Merge branches 'arch-alpha', 'arch-arm', 'arch-arm64', 'arch-avr32', 'arch-blackfin', 'arch-c6x', 'arch-cris', 'arch-frv', 'arch-h8300', 'arch-hexagon', 'arch-ia64', 'arch-m32r', 'arch-m68k', 'arch-microblaze', 'arch-mips', 'arch-mn10300', 'arch-openrisc', 'arch-parisc', 'arch-powerpc', 'arch-s390', 'arch-score', 'arch-sh', 'arch-sparc', 'arch-tile', 'arch-unicore32', 'arch-x86' and 'arch-xtensa'

arch/arm/Kconfig

@@ -56,6 +56,9 @@ config ARM
 	select HAVE_MOD_ARCH_SPECIFIC if ARM_UNWIND
 	select MODULES_USE_ELF_REL
 	select CLONE_BACKWARDS
+	select GENERIC_SIGALTSTACK
+	select OLD_SIGSUSPEND3
+	select OLD_SIGACTION
 	help
 	  The ARM series is a line of low-power-consumption RISC chip designs
 	  licensed by ARM Ltd and targeted at embedded applications and

arch/arm/include/asm/signal.h

@@ -16,13 +16,6 @@ typedef struct {
 	unsigned long sig[_NSIG_WORDS];
 } sigset_t;
 
-struct old_sigaction {
-	__sighandler_t sa_handler;
-	old_sigset_t sa_mask;
-	unsigned long sa_flags;
-	__sigrestore_t sa_restorer;
-};
-
 #define __ARCH_HAS_SA_RESTORER
 
 #include <asm/sigcontext.h>

arch/arm/kernel/calls.S

@@ -195,7 +195,7 @@
 		CALL(sys_getcwd)
 		CALL(sys_capget)
 /* 185 */	CALL(sys_capset)
-		CALL(sys_sigaltstack_wrapper)
+		CALL(sys_sigaltstack)
 		CALL(sys_sendfile)
 		CALL(sys_ni_syscall)		/* getpmsg */
 		CALL(sys_ni_syscall)		/* putpmsg */

arch/arm/kernel/entry-common.S

@@ -514,11 +514,6 @@ sys_rt_sigreturn_wrapper:
 		b	sys_rt_sigreturn
 ENDPROC(sys_rt_sigreturn_wrapper)
 
-sys_sigaltstack_wrapper:
-		ldr	r2, [sp, #S_OFF + S_SP]
-		b	do_sigaltstack
-ENDPROC(sys_sigaltstack_wrapper)
-
 sys_statfs64_wrapper:
 		teq	r1, #88
 		moveq	r1, #84

arch/arm/kernel/signal.c

@@ -45,48 +45,6 @@ const unsigned long sigreturn_codes[7] = {
 	MOV_R7_NR_RT_SIGRETURN, SWI_SYS_RT_SIGRETURN, SWI_THUMB_RT_SIGRETURN,
 };
 
-/*
- * atomically swap in the new signal mask, and wait for a signal.
- */
-asmlinkage int sys_sigsuspend(int restart, unsigned long oldmask, old_sigset_t mask)
-{
-	sigset_t blocked;
-	siginitset(&blocked, mask);
-	return sigsuspend(&blocked);
-}
-
-asmlinkage int 
-sys_sigaction(int sig, const struct old_sigaction __user *act,
-	      struct old_sigaction __user *oact)
-{
-	struct k_sigaction new_ka, old_ka;
-	int ret;
-
-	if (act) {
-		old_sigset_t mask;
-		if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
-		    __get_user(new_ka.sa.sa_handler, &act->sa_handler) ||
-		    __get_user(new_ka.sa.sa_restorer, &act->sa_restorer) ||
-		    __get_user(new_ka.sa.sa_flags, &act->sa_flags) ||
-		    __get_user(mask, &act->sa_mask))
-			return -EFAULT;
-		siginitset(&new_ka.sa.sa_mask, mask);
-	}
-
-	ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
-
-	if (!ret && oact) {
-		if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
-		    __put_user(old_ka.sa.sa_handler, &oact->sa_handler) ||
-		    __put_user(old_ka.sa.sa_restorer, &oact->sa_restorer) ||
-		    __put_user(old_ka.sa.sa_flags, &oact->sa_flags) ||
-		    __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask))
-			return -EFAULT;
-	}
-
-	return ret;
-}
-
 #ifdef CONFIG_CRUNCH
 static int preserve_crunch_context(struct crunch_sigframe __user *frame)
 {
@@ -300,7 +258,7 @@ asmlinkage int sys_rt_sigreturn(struct pt_regs *regs)
 	if (restore_sigframe(regs, &frame->sig))
 		goto badframe;
 
-	if (do_sigaltstack(&frame->sig.uc.uc_stack, NULL, regs->ARM_sp) == -EFAULT)
+	if (restore_altstack(&frame->sig.uc.uc_stack))
 		goto badframe;
 
 	return regs->ARM_r0;
@@ -486,7 +444,6 @@ setup_rt_frame(int usig, struct k_sigaction *ka, siginfo_t *info,
 	       sigset_t *set, struct pt_regs *regs)
 {
 	struct rt_sigframe __user *frame = get_sigframe(ka, regs, sizeof(*frame));
-	stack_t stack;
 	int err = 0;
 
 	if (!frame)
@@ -497,12 +454,7 @@ setup_rt_frame(int usig, struct k_sigaction *ka, siginfo_t *info,
 	__put_user_error(0, &frame->sig.uc.uc_flags, err);
 	__put_user_error(NULL, &frame->sig.uc.uc_link, err);
 
-	memset(&stack, 0, sizeof(stack));
-	stack.ss_sp = (void __user *)current->sas_ss_sp;
-	stack.ss_flags = sas_ss_flags(regs->ARM_sp);
-	stack.ss_size = current->sas_ss_size;
-	err |= __copy_to_user(&frame->sig.uc.uc_stack, &stack, sizeof(stack));
-
+	err |= __save_altstack(&frame->sig.uc.uc_stack, regs->ARM_sp);
 	err |= setup_sigframe(&frame->sig, regs, set);
 	if (err == 0)
 		err = setup_return(regs, ka, frame->sig.retcode, frame, usig);

arch/arm64/Kconfig

@@ -6,10 +6,15 @@ config ARM64
 	select CLONE_BACKWARDS
 	select COMMON_CLK
 	select GENERIC_CLOCKEVENTS
+	select GENERIC_COMPAT_RT_SIGACTION
+	select GENERIC_COMPAT_RT_SIGPENDING
+	select GENERIC_COMPAT_RT_SIGPROCMASK
+	select GENERIC_COMPAT_RT_SIGQUEUEINFO
 	select GENERIC_HARDIRQS_NO_DEPRECATED
 	select GENERIC_IOMAP
 	select GENERIC_IRQ_PROBE
 	select GENERIC_IRQ_SHOW
+	select GENERIC_SIGALTSTACK
 	select GENERIC_SMP_IDLE_THREAD
 	select GENERIC_TIME_VSYSCALL
 	select HARDIRQS_SW_RESEND
@@ -204,6 +209,8 @@ config COMPAT
 	depends on !ARM64_64K_PAGES
 	select COMPAT_BINFMT_ELF
 	select HAVE_UID16
+	select OLD_SIGSUSPEND3
+	select COMPAT_OLD_SIGACTION
 	help
 	  This option enables support for a 32-bit EL0 running under a 64-bit
 	  kernel at EL1. AArch32-specific components such as system calls,

arch/arm64/include/asm/syscalls.h

@@ -24,8 +24,6 @@
  * System call wrappers implemented in kernel/entry.S.
  */
 asmlinkage long sys_rt_sigreturn_wrapper(void);
-asmlinkage long sys_sigaltstack_wrapper(const stack_t __user *uss,
-					stack_t __user *uoss);
 
 #include <asm-generic/syscalls.h>
 

arch/arm64/include/asm/unistd32.h

@@ -93,7 +93,7 @@ __SYSCALL(68,  sys_ni_syscall)			/* 68 was sys_sgetmask */
 __SYSCALL(69,  sys_ni_syscall)			/* 69 was sys_ssetmask */
 __SYSCALL(70,  sys_setreuid16)
 __SYSCALL(71,  sys_setregid16)
-__SYSCALL(72,  compat_sys_sigsuspend)
+__SYSCALL(72,  sys_sigsuspend)
 __SYSCALL(73,  compat_sys_sigpending)
 __SYSCALL(74,  sys_sethostname)
 __SYSCALL(75,  compat_sys_setrlimit)
@@ -207,7 +207,7 @@ __SYSCALL(182, sys_chown16)
 __SYSCALL(183, sys_getcwd)
 __SYSCALL(184, sys_capget)
 __SYSCALL(185, sys_capset)
-__SYSCALL(186, compat_sys_sigaltstack_wrapper)
+__SYSCALL(186, compat_sys_sigaltstack)
 __SYSCALL(187, compat_sys_sendfile)
 __SYSCALL(188, sys_ni_syscall)			/* 188 reserved */
 __SYSCALL(189, sys_ni_syscall)			/* 189 reserved */

arch/arm64/kernel/entry.S

@@ -677,10 +677,5 @@ ENTRY(sys_rt_sigreturn_wrapper)
 	b	sys_rt_sigreturn
 ENDPROC(sys_rt_sigreturn_wrapper)
 
-ENTRY(sys_sigaltstack_wrapper)
-	ldr	x2, [sp, #S_SP]
-	b	sys_sigaltstack
-ENDPROC(sys_sigaltstack_wrapper)
-
 ENTRY(handle_arch_irq)
 	.quad	0

arch/arm64/kernel/signal.c

@@ -149,8 +149,7 @@ asmlinkage long sys_rt_sigreturn(struct pt_regs *regs)
 	if (restore_sigframe(regs, frame))
 		goto badframe;
 
-	if (do_sigaltstack(&frame->uc.uc_stack,
-			   NULL, regs->sp) == -EFAULT)
+	if (restore_altstack(&frame->uc.uc_stack))
 		goto badframe;
 
 	return regs->regs[0];
@@ -164,12 +163,6 @@ badframe:
 	return 0;
 }
 
-asmlinkage long sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss,
-				unsigned long sp)
-{
-	return do_sigaltstack(uss, uoss, sp);
-}
-
 static int setup_sigframe(struct rt_sigframe __user *sf,
 			  struct pt_regs *regs, sigset_t *set)
 {
@@ -250,7 +243,6 @@ static int setup_rt_frame(int usig, struct k_sigaction *ka, siginfo_t *info,
 			  sigset_t *set, struct pt_regs *regs)
 {
 	struct rt_sigframe __user *frame;
-	stack_t stack;
 	int err = 0;
 
 	frame = get_sigframe(ka, regs);
@@ -260,12 +252,7 @@ static int setup_rt_frame(int usig, struct k_sigaction *ka, siginfo_t *info,
 	__put_user_error(0, &frame->uc.uc_flags, err);
 	__put_user_error(NULL, &frame->uc.uc_link, err);
 
-	memset(&stack, 0, sizeof(stack));
-	stack.ss_sp = (void __user *)current->sas_ss_sp;
-	stack.ss_flags = sas_ss_flags(regs->sp);
-	stack.ss_size = current->sas_ss_size;
-	err |= __copy_to_user(&frame->uc.uc_stack, &stack, sizeof(stack));
-
+	err |= __save_altstack(&frame->uc.uc_stack, regs->sp);
 	err |= setup_sigframe(frame, regs, set);
 	if (err == 0) {
 		setup_return(regs, ka, frame, usig);

arch/arm64/kernel/signal32.c

@@ -28,26 +28,6 @@
 #include <asm/uaccess.h>
 #include <asm/unistd32.h>
 
-struct compat_sigaction {
-	compat_uptr_t			sa_handler;
-	compat_ulong_t			sa_flags;
-	compat_uptr_t			sa_restorer;
-	compat_sigset_t			sa_mask;
-};
-
-struct compat_old_sigaction {
-	compat_uptr_t			sa_handler;
-	compat_old_sigset_t		sa_mask;
-	compat_ulong_t			sa_flags;
-	compat_uptr_t			sa_restorer;
-};
-
-typedef struct compat_sigaltstack {
-	compat_uptr_t			ss_sp;
-	int				ss_flags;
-	compat_size_t			ss_size;
-} compat_stack_t;
-
 struct compat_sigcontext {
 	/* We always set these two fields to 0 */
 	compat_ulong_t			trap_no;
@@ -339,127 +319,6 @@ static int compat_restore_vfp_context(struct compat_vfp_sigframe __user *frame)
 	return err ? -EFAULT : 0;
 }
 
-/*
- * atomically swap in the new signal mask, and wait for a signal.
- */
-asmlinkage int compat_sys_sigsuspend(int restart, compat_ulong_t oldmask,
-				     compat_old_sigset_t mask)
-{
-	sigset_t blocked;
-
-	siginitset(&current->blocked, mask);
-	return sigsuspend(&blocked);
-}
-
-asmlinkage int compat_sys_sigaction(int sig,
-				    const struct compat_old_sigaction __user *act,
-				    struct compat_old_sigaction __user *oact)
-{
-	struct k_sigaction new_ka, old_ka;
-	int ret;
-	compat_old_sigset_t mask;
-	compat_uptr_t handler, restorer;
-
-	if (act) {
-		if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
-		    __get_user(handler, &act->sa_handler) ||
-		    __get_user(restorer, &act->sa_restorer) ||
-		    __get_user(new_ka.sa.sa_flags, &act->sa_flags) ||
-		    __get_user(mask, &act->sa_mask))
-			return -EFAULT;
-
-		new_ka.sa.sa_handler = compat_ptr(handler);
-		new_ka.sa.sa_restorer = compat_ptr(restorer);
-		siginitset(&new_ka.sa.sa_mask, mask);
-	}
-
-	ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
-
-	if (!ret && oact) {
-		if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
-		    __put_user(ptr_to_compat(old_ka.sa.sa_handler),
-			       &oact->sa_handler) ||
-		    __put_user(ptr_to_compat(old_ka.sa.sa_restorer),
-			       &oact->sa_restorer) ||
-		    __put_user(old_ka.sa.sa_flags, &oact->sa_flags) ||
-		    __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask))
-			return -EFAULT;
-	}
-
-	return ret;
-}
-
-asmlinkage int compat_sys_rt_sigaction(int sig,
-				       const struct compat_sigaction __user *act,
-				       struct compat_sigaction __user *oact,
-				       compat_size_t sigsetsize)
-{
-	struct k_sigaction new_ka, old_ka;
-	int ret;
-
-	/* XXX: Don't preclude handling different sized sigset_t's.  */
-	if (sigsetsize != sizeof(compat_sigset_t))
-		return -EINVAL;
-
-	if (act) {
-		compat_uptr_t handler, restorer;
-
-		ret = get_user(handler, &act->sa_handler);
-		new_ka.sa.sa_handler = compat_ptr(handler);
-		ret |= get_user(restorer, &act->sa_restorer);
-		new_ka.sa.sa_restorer = compat_ptr(restorer);
-		ret |= get_sigset_t(&new_ka.sa.sa_mask, &act->sa_mask);
-		ret |= __get_user(new_ka.sa.sa_flags, &act->sa_flags);
-		if (ret)
-			return -EFAULT;
-	}
-
-	ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
-	if (!ret && oact) {
-		ret = put_user(ptr_to_compat(old_ka.sa.sa_handler), &oact->sa_handler);
-		ret |= put_sigset_t(&oact->sa_mask, &old_ka.sa.sa_mask);
-		ret |= __put_user(old_ka.sa.sa_flags, &oact->sa_flags);
-	}
-	return ret;
-}
-
-int compat_do_sigaltstack(compat_uptr_t compat_uss, compat_uptr_t compat_uoss,
-			  compat_ulong_t sp)
-{
-	compat_stack_t __user *newstack = compat_ptr(compat_uss);
-	compat_stack_t __user *oldstack = compat_ptr(compat_uoss);
-	compat_uptr_t ss_sp;
-	int ret;
-	mm_segment_t old_fs;
-	stack_t uss, uoss;
-
-	/* Marshall the compat new stack into a stack_t */
-	if (newstack) {
-		if (get_user(ss_sp, &newstack->ss_sp) ||
-		    __get_user(uss.ss_flags, &newstack->ss_flags) ||
-		    __get_user(uss.ss_size, &newstack->ss_size))
-			return -EFAULT;
-		uss.ss_sp = compat_ptr(ss_sp);
-	}
-
-	old_fs = get_fs();
-	set_fs(KERNEL_DS);
-	/* The __user pointer casts are valid because of the set_fs() */
-	ret = do_sigaltstack(
-		newstack ? (stack_t __user *) &uss : NULL,
-		oldstack ? (stack_t __user *) &uoss : NULL,
-		(unsigned long)sp);
-	set_fs(old_fs);
-
-	/* Convert the old stack_t into a compat stack. */
-	if (!ret && oldstack &&
-		(put_user(ptr_to_compat(uoss.ss_sp), &oldstack->ss_sp) ||
-		 __put_user(uoss.ss_flags, &oldstack->ss_flags) ||
-		 __put_user(uoss.ss_size, &oldstack->ss_size)))
-		return -EFAULT;
-	return ret;
-}
-
 static int compat_restore_sigframe(struct pt_regs *regs,
 				   struct compat_sigframe __user *sf)
 {
@@ -562,9 +421,7 @@ asmlinkage int compat_sys_rt_sigreturn(struct pt_regs *regs)
 	if (compat_restore_sigframe(regs, &frame->sig))
 		goto badframe;
 
-	if (compat_do_sigaltstack(ptr_to_compat(&frame->sig.uc.uc_stack),
-				 ptr_to_compat((void __user *)NULL),
-				 regs->compat_sp) == -EFAULT)
+	if (compat_restore_altstack(&frame->sig.uc.uc_stack))
 		goto badframe;
 
 	return regs->regs[0];
@@ -705,11 +562,7 @@ int compat_setup_rt_frame(int usig, struct k_sigaction *ka, siginfo_t *info,
 	__put_user_error(0, &frame->sig.uc.uc_flags, err);
 	__put_user_error(NULL, &frame->sig.uc.uc_link, err);
 
-	memset(&stack, 0, sizeof(stack));
-	stack.ss_sp = (compat_uptr_t)current->sas_ss_sp;
-	stack.ss_flags = sas_ss_flags(regs->compat_sp);
-	stack.ss_size = current->sas_ss_size;
-	err |= __copy_to_user(&frame->sig.uc.uc_stack, &stack, sizeof(stack));
+	err |= __compat_save_altstack(&frame->sig.uc.uc_stack, regs->compat_sp);
 
 	err |= compat_setup_sigframe(&frame->sig, regs, set);
 
@@ -742,75 +595,6 @@ int compat_setup_frame(int usig, struct k_sigaction *ka, sigset_t *set,
 	return err;
 }
 
-/*
- * RT signals don't have generic compat wrappers.
- * See arch/powerpc/kernel/signal_32.c
- */
-asmlinkage int compat_sys_rt_sigprocmask(int how, compat_sigset_t __user *set,
-					 compat_sigset_t __user *oset,
-					 compat_size_t sigsetsize)
-{
-	sigset_t s;
-	sigset_t __user *up;
-	int ret;
-	mm_segment_t old_fs = get_fs();
-
-	if (set) {
-		if (get_sigset_t(&s, set))
-			return -EFAULT;
-	}
-
-	set_fs(KERNEL_DS);
-	/* This is valid because of the set_fs() */
-	up = (sigset_t __user *) &s;
-	ret = sys_rt_sigprocmask(how, set ? up : NULL, oset ? up : NULL,
-				 sigsetsize);
-	set_fs(old_fs);
-	if (ret)
-		return ret;
-	if (oset) {
-		if (put_sigset_t(oset, &s))
-			return -EFAULT;
-	}
-	return 0;
-}
-
-asmlinkage int compat_sys_rt_sigpending(compat_sigset_t __user *set,
-					compat_size_t sigsetsize)
-{
-	sigset_t s;
-	int ret;
-	mm_segment_t old_fs = get_fs();
-
-	set_fs(KERNEL_DS);
-	/* The __user pointer cast is valid because of the set_fs() */
-	ret = sys_rt_sigpending((sigset_t __user *) &s, sigsetsize);
-	set_fs(old_fs);
-	if (!ret) {
-		if (put_sigset_t(set, &s))
-			return -EFAULT;
-	}
-	return ret;
-}
-
-asmlinkage int compat_sys_rt_sigqueueinfo(int pid, int sig,
-					  compat_siginfo_t __user *uinfo)
-{
-	siginfo_t info;
-	int ret;
-	mm_segment_t old_fs = get_fs();
-
-	ret = copy_siginfo_from_user32(&info, uinfo);
-	if (unlikely(ret))
-		return ret;
-
-	set_fs (KERNEL_DS);
-	/* The __user pointer cast is valid because of the set_fs() */
-	ret = sys_rt_sigqueueinfo(pid, sig, (siginfo_t __user *) &info);
-	set_fs (old_fs);
-	return ret;
-}
-
 void compat_setup_restart_syscall(struct pt_regs *regs)
 {
        regs->regs[7] = __NR_compat_restart_syscall;

arch/arm64/kernel/sys.c

@@ -40,7 +40,6 @@ asmlinkage long sys_mmap(unsigned long addr, unsigned long len,
  * Wrappers to pass the pt_regs argument.
  */
 #define sys_rt_sigreturn	sys_rt_sigreturn_wrapper
-#define sys_sigaltstack		sys_sigaltstack_wrapper
 
 #include <asm/syscalls.h>
 

arch/arm64/kernel/sys32.S

@@ -39,11 +39,6 @@ compat_sys_rt_sigreturn_wrapper:
 	b	compat_sys_rt_sigreturn
 ENDPROC(compat_sys_rt_sigreturn_wrapper)
 
-compat_sys_sigaltstack_wrapper:
-	ldr	x2, [sp, #S_COMPAT_SP]
-	b	compat_do_sigaltstack
-ENDPROC(compat_sys_sigaltstack_wrapper)
-
 compat_sys_statfs64_wrapper:
 	mov	w3, #84
 	cmp	w1, #88

arch/avr32/Kconfig

@@ -17,6 +17,7 @@ config AVR32
 	select GENERIC_CLOCKEVENTS
 	select HAVE_MOD_ARCH_SPECIFIC
 	select MODULES_USE_ELF_RELA
+	select GENERIC_SIGALTSTACK
 	help
 	  AVR32 is a high-performance 32-bit RISC microprocessor core,
 	  designed for cost-sensitive embedded applications, with particular

arch/avr32/kernel/signal.c

@@ -21,12 +21,6 @@
 #include <asm/ucontext.h>
 #include <asm/syscalls.h>
 
-asmlinkage int sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss,
-			       struct pt_regs *regs)
-{
-	return do_sigaltstack(uss, uoss, regs->sp);
-}
-
 struct rt_sigframe
 {
 	struct siginfo info;
@@ -91,7 +85,7 @@ asmlinkage int sys_rt_sigreturn(struct pt_regs *regs)
 	if (restore_sigcontext(regs, &frame->uc.uc_mcontext))
 		goto badframe;
 
-	if (do_sigaltstack(&frame->uc.uc_stack, NULL, regs->sp) == -EFAULT)
+	if (restore_altstack(&frame->uc.uc_stack))
 		goto badframe;
 
 	pr_debug("Context restored: pc = %08lx, lr = %08lx, sp = %08lx\n",
@@ -175,12 +169,7 @@ setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
 	/* Set up the ucontext */
 	err |= __put_user(0, &frame->uc.uc_flags);
 	err |= __put_user(NULL, &frame->uc.uc_link);
-	err |= __put_user((void __user *)current->sas_ss_sp,
-			  &frame->uc.uc_stack.ss_sp);
-	err |= __put_user(sas_ss_flags(regs->sp),
-			  &frame->uc.uc_stack.ss_flags);
-	err |= __put_user(current->sas_ss_size,
-			  &frame->uc.uc_stack.ss_size);
+	err |= __save_altstack(&frame->uc.uc_stack, regs->sp);
 	err |= setup_sigcontext(&frame->uc.uc_mcontext, regs);
 	err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));
 

arch/avr32/kernel/syscall-stubs.S

@@ -20,12 +20,6 @@ __sys_rt_sigsuspend:
 	mov	r10, sp
 	rjmp	sys_rt_sigsuspend
 
-	.global	__sys_sigaltstack
-	.type	__sys_sigaltstack,@function
-__sys_sigaltstack:
-	mov	r10, sp
-	rjmp	sys_sigaltstack
-
 	.global	__sys_rt_sigreturn
 	.type	__sys_rt_sigreturn,@function
 __sys_rt_sigreturn:

arch/avr32/kernel/syscall_table.S

@@ -115,7 +115,7 @@ sys_call_table:
 	.long	sys_statfs
 	.long	sys_fstatfs		/* 100 */
 	.long	sys_vhangup
-	.long	__sys_sigaltstack
+	.long	sys_sigaltstack
 	.long	sys_syslog
 	.long	sys_setitimer
 	.long	sys_getitimer		/* 105 */

arch/blackfin/Kconfig

@@ -45,6 +45,7 @@ config BLACKFIN
 	select ARCH_USES_GETTIMEOFFSET if !GENERIC_CLOCKEVENTS
 	select HAVE_MOD_ARCH_SPECIFIC
 	select MODULES_USE_ELF_RELA
+	select GENERIC_SIGALTSTACK
 
 config GENERIC_CSUM
 	def_bool y

arch/blackfin/kernel/signal.c

@@ -37,11 +37,6 @@ struct rt_sigframe {
 	struct ucontext uc;
 };
 
-asmlinkage int sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss)
-{
-	return do_sigaltstack(uss, uoss, rdusp());
-}
-
 static inline int
 rt_restore_sigcontext(struct pt_regs *regs, struct sigcontext __user *sc, int *pr0)
 {
@@ -100,7 +95,7 @@ asmlinkage int sys_rt_sigreturn(void)
 	if (rt_restore_sigcontext(regs, &frame->uc.uc_mcontext, &r0))
 		goto badframe;
 
-	if (do_sigaltstack(&frame->uc.uc_stack, NULL, regs->usp) == -EFAULT)
+	if (restore_altstack(&frame->uc.uc_stack))
 		goto badframe;
 
 	return r0;
@@ -178,10 +173,7 @@ setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t * info,
 	/* Create the ucontext.  */
 	err |= __put_user(0, &frame->uc.uc_flags);
 	err |= __put_user(0, &frame->uc.uc_link);
-	err |=
-	    __put_user((void *)current->sas_ss_sp, &frame->uc.uc_stack.ss_sp);
-	err |= __put_user(sas_ss_flags(rdusp()), &frame->uc.uc_stack.ss_flags);
-	err |= __put_user(current->sas_ss_size, &frame->uc.uc_stack.ss_size);
+	err |= __save_altstack(&frame->uc.uc_stack, rdusp());
 	err |= rt_setup_sigcontext(&frame->uc.uc_mcontext, regs);
 	err |= copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));
 

arch/c6x/Kconfig

@@ -18,6 +18,7 @@ config C6X
 	select OF_EARLY_FLATTREE
 	select GENERIC_CLOCKEVENTS
 	select MODULES_USE_ELF_RELA
+	select GENERIC_SIGALTSTACK
 
 config MMU
 	def_bool n

arch/c6x/kernel/entry.S

@@ -598,18 +598,6 @@ ENTRY(enable_exception)
 	NOP	5
 ENDPROC(enable_exception)
 
-ENTRY(sys_sigaltstack)
-#ifdef CONFIG_C6X_BIG_KERNEL
-	MVKL	.S1	do_sigaltstack,A0	; branch to do_sigaltstack
-	MVKH	.S1	do_sigaltstack,A0
-	B	.S2X	A0
-#else
-	B	.S2	do_sigaltstack
-#endif
-	LDW	.D2T1	*+SP(REGS_SP+8),A6
-	NOP	4
-ENDPROC(sys_sigaltstack)
-
 	;;
 	;; Special system calls
 	;; return address is in B3

arch/cris/Kconfig

@@ -50,6 +50,9 @@ config CRIS
 	select GENERIC_CMOS_UPDATE
 	select MODULES_USE_ELF_RELA
 	select CLONE_BACKWARDS2
+	select GENERIC_SIGALTSTACK
+	select OLD_SIGSUSPEND
+	select OLD_SIGACTION
 
 config HZ
 	int

arch/cris/arch-v10/kernel/signal.c

@@ -41,55 +41,6 @@
 
 void do_signal(int canrestart, struct pt_regs *regs);
 
-/*
- * Atomically swap in the new signal mask, and wait for a signal.  Define
- * dummy arguments to be able to reach the regs argument.  (Note that this
- * arrangement relies on old_sigset_t occupying one register.)
- */
-int sys_sigsuspend(old_sigset_t mask)
-{
-	sigset_t blocked;
-	siginitset(&blocked, mask);
-	return sigsuspend(&blocked);
-}
-
-int sys_sigaction(int sig, const struct old_sigaction __user *act,
-	struct old_sigaction *oact)
-{
-	struct k_sigaction new_ka, old_ka;
-	int ret;
-
-	if (act) {
-		old_sigset_t mask;
-		if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
-		    __get_user(new_ka.sa.sa_handler, &act->sa_handler) ||
-		    __get_user(new_ka.sa.sa_restorer, &act->sa_restorer) ||
-		     __get_user(new_ka.sa.sa_flags, &act->sa_flags) ||
-		     __get_user(mask, &act->sa_mask))
-			return -EFAULT;
-		siginitset(&new_ka.sa.sa_mask, mask);
-	}
-
-	ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
-
-	if (!ret && oact) {
-		if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
-		    __put_user(old_ka.sa.sa_handler, &oact->sa_handler) ||
-		    __put_user(old_ka.sa.sa_restorer, &oact->sa_restorer) ||
-		    __put_user(old_ka.sa.sa_flags, &oact->sa_flags) ||
-		    __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask))
-			return -EFAULT;
-	}
-
-	return ret;
-}
-
-int sys_sigaltstack(const stack_t *uss, stack_t __user *uoss)
-{
-	return do_sigaltstack(uss, uoss, rdusp());
-}
-
-
 /*
  * Do a signal return; undo the signal stack.
  */
@@ -150,11 +101,9 @@ badframe:
 	return 1;
 }
 
-/* Define dummy arguments to be able to reach the regs argument.  */
-
-asmlinkage int sys_sigreturn(long r10, long r11, long r12, long r13, long mof,
-                             long srp, struct pt_regs *regs)
+asmlinkage int sys_sigreturn(void)
 {
+	struct pt_regs *regs = current_pt_regs();
 	struct sigframe __user *frame = (struct sigframe *)rdusp();
 	sigset_t set;
 
@@ -188,11 +137,9 @@ badframe:
 	return 0;
 }
 
-/* Define dummy arguments to be able to reach the regs argument.  */
-
-asmlinkage int sys_rt_sigreturn(long r10, long r11, long r12, long r13,
-                                long mof, long srp, struct pt_regs *regs)
+asmlinkage int sys_rt_sigreturn(void)
 {
+	struct pt_regs *regs = current_pt_regs();
 	struct rt_sigframe __user *frame = (struct rt_sigframe *)rdusp();
 	sigset_t set;
 
@@ -214,7 +161,7 @@ asmlinkage int sys_rt_sigreturn(long r10, long r11, long r12, long r13,
 	if (restore_sigcontext(regs, &frame->uc.uc_mcontext))
 		goto badframe;
 
-	if (do_sigaltstack(&frame->uc.uc_stack, NULL, rdusp()) == -EFAULT)
+	if (restore_altstack(&frame->uc.uc_stack))
 		goto badframe;
 
 	return regs->r10;
@@ -362,6 +309,8 @@ static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
 
 	err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));
 
+	err |= __save_altstack(&frame->uc.uc_stack, rdusp());
+
 	if (err)
 		goto give_sigsegv;
 

arch/cris/arch-v32/kernel/signal.c

@@ -51,59 +51,6 @@ struct rt_signal_frame {
 void do_signal(int restart, struct pt_regs *regs);
 void keep_debug_flags(unsigned long oldccs, unsigned long oldspc,
 		      struct pt_regs *regs);
-/*
- * Swap in the new signal mask, and wait for a signal. Define some
- * dummy arguments to be able to reach the regs argument.
- */
-int
-sys_sigsuspend(old_sigset_t mask)
-{
-	sigset_t blocked;
-	siginitset(&blocked, mask);
-	return sigsuspend(&blocked);
-}
-
-int
-sys_sigaction(int signal, const struct old_sigaction *act,
-	      struct old_sigaction *oact)
-{
-	int retval;
-	struct k_sigaction newk;
-	struct k_sigaction oldk;
-
-	if (act) {
-		old_sigset_t mask;
-
-		if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
-		    __get_user(newk.sa.sa_handler, &act->sa_handler) ||
-		    __get_user(newk.sa.sa_restorer, &act->sa_restorer) ||
-		    __get_user(newk.sa.sa_flags, &act->sa_flags) ||
-		    __get_user(mask, &act->sa_mask))
-			return -EFAULT;
-
-		siginitset(&newk.sa.sa_mask, mask);
-	}
-
-	retval = do_sigaction(signal, act ? &newk : NULL, oact ? &oldk : NULL);
-
-	if (!retval && oact) {
-		if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
-		    __put_user(oldk.sa.sa_handler, &oact->sa_handler) ||
-		    __put_user(oldk.sa.sa_restorer, &oact->sa_restorer) ||
-		    __put_user(oldk.sa.sa_flags, &oact->sa_flags) ||
-		    __put_user(oldk.sa.sa_mask.sig[0], &oact->sa_mask))
-			return -EFAULT;
-
-	}
-
-	return retval;
-}
-
-int
-sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss)
-{
-	return do_sigaltstack(uss, uoss, rdusp());
-}
 
 static int
 restore_sigcontext(struct pt_regs *regs, struct sigcontext __user *sc)
@@ -135,11 +82,9 @@ badframe:
 	return 1;
 }
 
-/* Define some dummy arguments to be able to reach the regs argument. */
-asmlinkage int
-sys_sigreturn(long r10, long r11, long r12, long r13, long mof, long srp,
-	      struct pt_regs *regs)
+asmlinkage int sys_sigreturn(void)
 {
+	struct pt_regs *regs = current_pt_regs();
 	sigset_t set;
 	struct signal_frame __user *frame;
 	unsigned long oldspc = regs->spc;
@@ -178,11 +123,9 @@ badframe:
 	return 0;
 }
 
-/* Define some dummy variables to be able to reach the regs argument. */
-asmlinkage int
-sys_rt_sigreturn(long r10, long r11, long r12, long r13, long mof, long srp,
-		 struct pt_regs *regs)
+asmlinkage int sys_rt_sigreturn(void)
 {
+	struct pt_regs *regs = current_pt_regs();
 	sigset_t set;
 	struct rt_signal_frame __user *frame;
 	unsigned long oldspc = regs->spc;
@@ -209,7 +152,7 @@ sys_rt_sigreturn(long r10, long r11, long r12, long r13, long mof, long srp,
 	if (restore_sigcontext(regs, &frame->uc.uc_mcontext))
 		goto badframe;
 
-	if (do_sigaltstack(&frame->uc.uc_stack, NULL, rdusp()) == -EFAULT)
+	if (restore_altstack(&frame->uc.uc_stack))
 		goto badframe;
 
 	keep_debug_flags(oldccs, oldspc, regs);
@@ -371,6 +314,7 @@ setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
 	err |= __clear_user(&frame->uc, offsetof(struct ucontext, uc_mcontext));
 	err |= setup_sigcontext(&frame->uc.uc_mcontext, regs, set->sig[0]);
 	err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));
+	err |= __save_altstack(&frame->uc.uc_stack, rdusp());
 
 	if (err)
 		goto give_sigsegv;

arch/cris/include/asm/signal.h

@@ -16,13 +16,6 @@ typedef struct {
 	unsigned long sig[_NSIG_WORDS];
 } sigset_t;
 
-struct old_sigaction {
-	__sighandler_t sa_handler;
-	old_sigset_t sa_mask;
-	unsigned long sa_flags;
-	void (*sa_restorer)(void);
-};
-
 #define __ARCH_HAS_SA_RESTORER
 
 #include <asm/sigcontext.h>

arch/frv/Kconfig

@@ -12,6 +12,9 @@ config FRV
 	select ARCH_HAVE_NMI_SAFE_CMPXCHG
 	select GENERIC_CPU_DEVICES
 	select ARCH_WANT_IPC_PARSE_VERSION
+	select GENERIC_SIGALTSTACK
+	select OLD_SIGSUSPEND3
+	select OLD_SIGACTION
 
 config ZONE_DMA
 	bool

arch/frv/include/asm/signal.h

@@ -3,11 +3,4 @@
 
 #include <uapi/asm/signal.h>
 
-struct old_sigaction {
-	__sighandler_t sa_handler;
-	old_sigset_t sa_mask;
-	unsigned long sa_flags;
-	__sigrestore_t sa_restorer;
-};
-
 #endif /* _ASM_SIGNAL_H */

arch/frv/kernel/signal.c

@@ -32,55 +32,6 @@ struct fdpic_func_descriptor {
 	unsigned long	GOT;
 };
 
-/*
- * Atomically swap in the new signal mask, and wait for a signal.
- */
-asmlinkage int sys_sigsuspend(int history0, int history1, old_sigset_t mask)
-{
-	sigset_t blocked;
-	siginitset(&blocked, mask);
-	return sigsuspend(&blocked);
-}
-
-asmlinkage int sys_sigaction(int sig,
-			     const struct old_sigaction __user *act,
-			     struct old_sigaction __user *oact)
-{
-	struct k_sigaction new_ka, old_ka;
-	int ret;
-
-	if (act) {
-		old_sigset_t mask;
-		if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
-		    __get_user(new_ka.sa.sa_handler, &act->sa_handler) ||
-		    __get_user(new_ka.sa.sa_restorer, &act->sa_restorer) ||
-		    __get_user(new_ka.sa.sa_flags, &act->sa_flags) ||
-		    __get_user(mask, &act->sa_mask))
-			return -EFAULT;
-		siginitset(&new_ka.sa.sa_mask, mask);
-	}
-
-	ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
-
-	if (!ret && oact) {
-		if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
-		    __put_user(old_ka.sa.sa_handler, &oact->sa_handler) ||
-		    __put_user(old_ka.sa.sa_restorer, &oact->sa_restorer) ||
-		    __put_user(old_ka.sa.sa_flags, &oact->sa_flags) ||
-		    __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask))
-			return -EFAULT;
-	}
-
-	return ret;
-}
-
-asmlinkage
-int sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss)
-{
-	return do_sigaltstack(uss, uoss, __frame->sp);
-}
-
-
 /*
  * Do a signal return; undo the signal stack.
  */
@@ -173,7 +124,7 @@ asmlinkage int sys_rt_sigreturn(void)
 	if (restore_sigcontext(&frame->uc.uc_mcontext, &gr8))
 		goto badframe;
 
-	if (do_sigaltstack(&frame->uc.uc_stack, NULL, __frame->sp) == -EFAULT)
+	if (restore_altstack(&frame->uc.uc_stack))
 		goto badframe;
 
 	return gr8;
@@ -345,9 +296,7 @@ static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
 	/* Create the ucontext.  */
 	if (__put_user(0, &frame->uc.uc_flags) ||
 	    __put_user(NULL, &frame->uc.uc_link) ||
-	    __put_user((void __user *)current->sas_ss_sp, &frame->uc.uc_stack.ss_sp) ||
-	    __put_user(sas_ss_flags(__frame->sp), &frame->uc.uc_stack.ss_flags) ||
-	    __put_user(current->sas_ss_size, &frame->uc.uc_stack.ss_size))
+	    __save_altstack(&frame->uc.uc_stack, __frame->sp))
 		goto give_sigsegv;
 
 	if (setup_sigcontext(&frame->uc.uc_mcontext, set->sig[0]))

arch/h8300/Kconfig

@@ -9,6 +9,9 @@ config H8300
 	select GENERIC_IRQ_SHOW
 	select GENERIC_CPU_DEVICES
 	select MODULES_USE_ELF_RELA
+	select GENERIC_SIGALTSTACK
+	select OLD_SIGSUSPEND3
+	select OLD_SIGACTION
 
 config SYMBOL_PREFIX
 	string

arch/h8300/include/asm/signal.h

@@ -16,13 +16,6 @@ typedef struct {
 	unsigned long sig[_NSIG_WORDS];
 } sigset_t;
 
-struct old_sigaction {
-	__sighandler_t sa_handler;
-	old_sigset_t sa_mask;
-	unsigned long sa_flags;
-	void (*sa_restorer)(void);
-};
-
 #define __ARCH_HAS_SA_RESTORER
 
 #include <asm/sigcontext.h>

arch/h8300/kernel/signal.c

@@ -46,56 +46,6 @@
 #include <asm/traps.h>
 #include <asm/ucontext.h>
 
-/*
- * Atomically swap in the new signal mask, and wait for a signal.
- */
-asmlinkage int
-sys_sigsuspend(int unused1, int unused2, old_sigset_t mask)
-{
-	sigset_t blocked;
-	siginitset(&blocked, mask);
-	return sigsuspend(&blocked);
-}
-
-asmlinkage int 
-sys_sigaction(int sig, const struct old_sigaction *act,
-	      struct old_sigaction *oact)
-{
-	struct k_sigaction new_ka, old_ka;
-	int ret;
-
-	if (act) {
-		old_sigset_t mask;
-		if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
-		    __get_user(new_ka.sa.sa_handler, &act->sa_handler) ||
-		    __get_user(new_ka.sa.sa_restorer, &act->sa_restorer) ||
-		    __get_user(new_ka.sa.sa_flags, &act->sa_flags) ||
-		    __get_user(mask, &act->sa_mask))
-			return -EFAULT;
-		siginitset(&new_ka.sa.sa_mask, mask);
-	}
-
-	ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
-
-	if (!ret && oact) {
-		if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
-		    __put_user(old_ka.sa.sa_handler, &oact->sa_handler) ||
-		    __put_user(old_ka.sa.sa_restorer, &oact->sa_restorer) ||
-		    __put_user(old_ka.sa.sa_flags, &oact->sa_flags) ||
-		    __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask))
-			return -EFAULT;
-	}
-
-	return ret;
-}
-
-asmlinkage int
-sys_sigaltstack(const stack_t *uss, stack_t *uoss)
-{
-	return do_sigaltstack(uss, uoss, rdusp());
-}
-
-
 /*
  * Do a signal return; undo the signal stack.
  *
@@ -136,9 +86,9 @@ struct rt_sigframe
 } __attribute__((aligned(2),packed));
 
 static inline int
-restore_sigcontext(struct pt_regs *regs, struct sigcontext *usc,
-		   int *pd0)
+restore_sigcontext(struct sigcontext *usc, int *pd0)
 {
+	struct pt_regs *regs = current_pt_regs();
 	int err = 0;
 	unsigned int ccr;
 	unsigned int usp;
@@ -167,9 +117,8 @@ restore_sigcontext(struct pt_regs *regs, struct sigcontext *usc,
 	return err;
 }
 
-asmlinkage int do_sigreturn(unsigned long __unused,...)
+asmlinkage int sys_sigreturn(void)
 {
-	struct pt_regs *regs = (struct pt_regs *) (&__unused - 1);
 	unsigned long usp = rdusp();
 	struct sigframe *frame = (struct sigframe *)(usp - 4);
 	sigset_t set;
@@ -185,7 +134,7 @@ asmlinkage int do_sigreturn(unsigned long __unused,...)
 
 	set_current_blocked(&set);
 	
-	if (restore_sigcontext(regs, &frame->sc, &er0))
+	if (restore_sigcontext(&frame->sc, &er0))
 		goto badframe;
 	return er0;
 
@@ -194,9 +143,8 @@ badframe:
 	return 0;
 }
 
-asmlinkage int do_rt_sigreturn(unsigned long __unused,...)
+asmlinkage int sys_rt_sigreturn(void)
 {
-	struct pt_regs *regs = (struct pt_regs *) &__unused;
 	unsigned long usp = rdusp();
 	struct rt_sigframe *frame = (struct rt_sigframe *)(usp - 4);
 	sigset_t set;
@@ -209,10 +157,10 @@ asmlinkage int do_rt_sigreturn(unsigned long __unused,...)
 
 	set_current_blocked(&set);
 	
-	if (restore_sigcontext(regs, &frame->uc.uc_mcontext, &er0))
+	if (restore_sigcontext(&frame->uc.uc_mcontext, &er0))
 		goto badframe;
 
-	if (do_sigaltstack(&frame->uc.uc_stack, NULL, usp) == -EFAULT)
+	if (restore_altstack(&frame->uc.uc_stack))
 		goto badframe;
 
 	return er0;
@@ -358,11 +306,7 @@ static int setup_rt_frame (int sig, struct k_sigaction *ka, siginfo_t *info,
 	/* Create the ucontext.  */
 	err |= __put_user(0, &frame->uc.uc_flags);
 	err |= __put_user(0, &frame->uc.uc_link);
-	err |= __put_user((void *)current->sas_ss_sp,
-			  &frame->uc.uc_stack.ss_sp);
-	err |= __put_user(sas_ss_flags(rdusp()),
-			  &frame->uc.uc_stack.ss_flags);
-	err |= __put_user(current->sas_ss_size, &frame->uc.uc_stack.ss_size);
+	err |= __save_altstack(&frame->uc.uc_stack, rdusp());
 	err |= setup_sigcontext(&frame->uc.uc_mcontext, regs, set->sig[0]);
 	err |= copy_to_user (&frame->uc.uc_sigmask, set, sizeof(*set));
 	if (err)

arch/h8300/kernel/syscalls.S

@@ -334,18 +334,3 @@ SYMBOL_NAME_LABEL(sys_call_table)
 	.long SYMBOL_NAME(sys_getcpu)
 	.long SYMBOL_NAME(sys_ni_syscall)	/* sys_epoll_pwait */
 	.long SYMBOL_NAME(sys_setns)		/* 320 */
-
-	.macro	call_sp addr
-	mov.l	#SYMBOL_NAME(\addr),er6
-	bra	SYMBOL_NAME(syscall_trampoline):8
-	.endm
-
-SYMBOL_NAME_LABEL(sys_sigreturn)
-	call_sp	do_sigreturn
-
-SYMBOL_NAME_LABEL(sys_rt_sigreturn)
-	call_sp	do_rt_sigreturn
-
-SYMBOL_NAME_LABEL(syscall_trampoline)
-	mov.l	sp,er0
-	jmp	@er6

arch/hexagon/Kconfig

@@ -31,6 +31,7 @@ config HEXAGON
 	select GENERIC_CLOCKEVENTS
 	select GENERIC_CLOCKEVENTS_BROADCAST
 	select MODULES_USE_ELF_RELA
+	select GENERIC_SIGALTSTACK
 	---help---
 	  Qualcomm Hexagon is a processor architecture designed for high
 	  performance and low power across a wide variety of applications.

arch/hexagon/kernel/signal.c

@@ -125,6 +125,7 @@ static int setup_rt_frame(int signr, struct k_sigaction *ka, siginfo_t *info,
 	err |= __put_user(0x5400c004, &frame->tramp[1]);
 	err |= setup_sigcontext(regs, &frame->uc.uc_mcontext);
 	err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));
+	err |= __save_altstack(&frame->uc.uc_stack, user_stack_pointer(regs));
 	if (err)
 		goto sigsegv;
 
@@ -247,12 +248,6 @@ void do_notify_resume(struct pt_regs *regs, unsigned long thread_info_flags)
 /*
  * Architecture-specific wrappers for signal-related system calls
  */
-asmlinkage int sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss)
-{
-	struct pt_regs *regs = current_pt_regs();
-
-	return do_sigaltstack(uss, uoss, regs->r29);
-}
 
 asmlinkage int sys_rt_sigreturn(void)
 {
@@ -288,14 +283,7 @@ asmlinkage int sys_rt_sigreturn(void)
 	 */
 	regs->syscall_nr = __NR_rt_sigreturn;
 
-	/*
-	 * If we were meticulous, we'd only call this if we knew that
-	 * we were actually going to use an alternate stack, and we'd
-	 * consider any error to be fatal.  What we do here, in common
-	 * with many other architectures, is call it blindly and only
-	 * consider the -EFAULT return case to be proof of a problem.
-	 */
-	if (do_sigaltstack(&frame->uc.uc_stack, NULL, pt_psp(regs)) == -EFAULT)
+	if (restore_altstack(&frame->uc.uc_stack))
 		goto badframe;
 
 	return 0;

arch/ia64/Kconfig

@@ -42,6 +42,7 @@ config IA64
 	select GENERIC_TIME_VSYSCALL_OLD
 	select HAVE_MOD_ARCH_SPECIFIC
 	select MODULES_USE_ELF_RELA
+	select GENERIC_SIGALTSTACK
 	default y
 	help
 	  The Itanium Processor Family is Intel's 64-bit successor to

arch/ia64/kernel/signal.c

@@ -39,14 +39,6 @@
 # define GET_SIGSET(k,u)	__get_user((k)->sig[0], &(u)->sig[0])
 #endif
 
-asmlinkage long
-sys_sigaltstack (const stack_t __user *uss, stack_t __user *uoss, long arg2,
-		 long arg3, long arg4, long arg5, long arg6, long arg7,
-		 struct pt_regs regs)
-{
-	return do_sigaltstack(uss, uoss, regs.r12);
-}
-
 static long
 restore_sigcontext (struct sigcontext __user *sc, struct sigscratch *scr)
 {
@@ -208,11 +200,8 @@ ia64_rt_sigreturn (struct sigscratch *scr)
 	printk("SIG return (%s:%d): sp=%lx ip=%lx\n",
 	       current->comm, current->pid, scr->pt.r12, scr->pt.cr_iip);
 #endif
-	/*
-	 * It is more difficult to avoid calling this function than to
-	 * call it and ignore errors.
-	 */
-	do_sigaltstack(&sc->sc_stack, NULL, scr->pt.r12);
+	if (restore_altstack(&sc->sc_stack))
+		goto give_sigsegv;
 	return retval;
 
   give_sigsegv:
@@ -376,9 +365,7 @@ setup_frame (int sig, struct k_sigaction *ka, siginfo_t *info, sigset_t *set,
 
 	err |= copy_siginfo_to_user(&frame->info, info);
 
-	err |= __put_user(current->sas_ss_sp, &frame->sc.sc_stack.ss_sp);
-	err |= __put_user(current->sas_ss_size, &frame->sc.sc_stack.ss_size);
-	err |= __put_user(sas_ss_flags(scr->pt.r12), &frame->sc.sc_stack.ss_flags);
+	err |= __save_altstack(&frame->sc.sc_stack, scr->pt.r12);
 	err |= setup_sigcontext(&frame->sc, set, scr);
 
 	if (unlikely(err))

arch/m32r/Kconfig

@@ -15,6 +15,7 @@ config M32R
 	select GENERIC_ATOMIC64
 	select ARCH_USES_GETTIMEOFFSET
 	select MODULES_USE_ELF_RELA
+	select GENERIC_SIGALTSTACK
 
 config SBUS
 	bool

arch/m32r/kernel/signal.c

@@ -27,15 +27,6 @@
 
 #define DEBUG_SIG 0
 
-asmlinkage int
-sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss,
-		unsigned long r2, unsigned long r3, unsigned long r4,
-		unsigned long r5, unsigned long r6, struct pt_regs *regs)
-{
-	return do_sigaltstack(uss, uoss, regs->spu);
-}
-
-
 /*
  * Do a signal return; undo the signal stack.
  */
@@ -113,7 +104,7 @@ sys_rt_sigreturn(unsigned long r0, unsigned long r1,
 	if (restore_sigcontext(regs, &frame->uc.uc_mcontext, &result))
 		goto badframe;
 
-	if (do_sigaltstack(&frame->uc.uc_stack, NULL, regs->spu) == -EFAULT)
+	if (restore_altstack(&frame->uc.uc_stack))
 		goto badframe;
 
 	return result;
@@ -213,10 +204,7 @@ static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
 	/* Create the ucontext.  */
 	err |= __put_user(0, &frame->uc.uc_flags);
 	err |= __put_user(0, &frame->uc.uc_link);
-	err |= __put_user(current->sas_ss_sp, &frame->uc.uc_stack.ss_sp);
-	err |= __put_user(sas_ss_flags(regs->spu),
-			  &frame->uc.uc_stack.ss_flags);
-	err |= __put_user(current->sas_ss_size, &frame->uc.uc_stack.ss_size);
+	err |= __save_altstack(&frame->uc.uc_stack, regs->spu);
 	err |= setup_sigcontext(&frame->uc.uc_mcontext, regs, set->sig[0]);
 	err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));
 	if (err)

arch/m68k/Kconfig

@@ -18,6 +18,9 @@ config M68K
 	select HAVE_MOD_ARCH_SPECIFIC
 	select MODULES_USE_ELF_REL
 	select MODULES_USE_ELF_RELA
+	select GENERIC_SIGALTSTACK
+	select OLD_SIGSUSPEND3
+	select OLD_SIGACTION
 
 config RWSEM_GENERIC_SPINLOCK
 	bool

arch/m68k/include/asm/signal.h

@@ -16,13 +16,6 @@ typedef struct {
 	unsigned long sig[_NSIG_WORDS];
 } sigset_t;
 
-struct old_sigaction {
-	__sighandler_t sa_handler;
-	old_sigset_t sa_mask;
-	unsigned long sa_flags;
-	__sigrestore_t sa_restorer;
-};
-
 #define __ARCH_HAS_SA_RESTORER
 
 #include <asm/sigcontext.h>

arch/m68k/kernel/signal.c

@@ -224,56 +224,6 @@ static inline void push_cache(unsigned long vaddr)
 
 #endif /* CONFIG_MMU */
 
-/*
- * Atomically swap in the new signal mask, and wait for a signal.
- */
-asmlinkage int
-sys_sigsuspend(int unused0, int unused1, old_sigset_t mask)
-{
-	sigset_t blocked;
-	siginitset(&blocked, mask);
-	return sigsuspend(&blocked);
-}
-
-asmlinkage int
-sys_sigaction(int sig, const struct old_sigaction __user *act,
-	      struct old_sigaction __user *oact)
-{
-	struct k_sigaction new_ka, old_ka;
-	int ret;
-
-	if (act) {
-		old_sigset_t mask;
-		if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
-		    __get_user(new_ka.sa.sa_handler, &act->sa_handler) ||
-		    __get_user(new_ka.sa.sa_restorer, &act->sa_restorer) ||
-		    __get_user(new_ka.sa.sa_flags, &act->sa_flags) ||
-		    __get_user(mask, &act->sa_mask))
-			return -EFAULT;
-		siginitset(&new_ka.sa.sa_mask, mask);
-	}
-
-	ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
-
-	if (!ret && oact) {
-		if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
-		    __put_user(old_ka.sa.sa_handler, &oact->sa_handler) ||
-		    __put_user(old_ka.sa.sa_restorer, &oact->sa_restorer) ||
-		    __put_user(old_ka.sa.sa_flags, &oact->sa_flags) ||
-		    __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask))
-			return -EFAULT;
-	}
-
-	return ret;
-}
-
-asmlinkage int
-sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss)
-{
-	return do_sigaltstack(uss, uoss, rdusp());
-}
-
-
 /*
  * Do a signal return; undo the signal stack.
  *
@@ -765,8 +715,9 @@ rt_restore_ucontext(struct pt_regs *regs, struct switch_stack *sw,
 	err |= __get_user(temp, &uc->uc_formatvec);
 
 	err |= rt_restore_fpu_state(uc);
+	err |= restore_altstack(&uc->uc_stack);
 
-	if (err || do_sigaltstack(&uc->uc_stack, NULL, usp) == -EFAULT)
+	if (err)
 		goto badframe;
 
 	if (mangle_kernel_stack(regs, temp, &uc->uc_extra))
@@ -1014,11 +965,7 @@ static int setup_rt_frame (int sig, struct k_sigaction *ka, siginfo_t *info,
 	/* Create the ucontext.  */
 	err |= __put_user(0, &frame->uc.uc_flags);
 	err |= __put_user(NULL, &frame->uc.uc_link);
-	err |= __put_user((void __user *)current->sas_ss_sp,
-			  &frame->uc.uc_stack.ss_sp);
-	err |= __put_user(sas_ss_flags(rdusp()),
-			  &frame->uc.uc_stack.ss_flags);
-	err |= __put_user(current->sas_ss_size, &frame->uc.uc_stack.ss_size);
+	err |= __save_altstack(&frame->uc.uc_stack, rdusp());
 	err |= rt_setup_ucontext(&frame->uc, regs);
 	err |= copy_to_user (&frame->uc.uc_sigmask, set, sizeof(*set));
 

arch/microblaze/Kconfig

@@ -27,6 +27,7 @@ config MICROBLAZE
 	select GENERIC_CLOCKEVENTS
 	select MODULES_USE_ELF_RELA
 	select CLONE_BACKWARDS
+	select GENERIC_SIGALTSTACK
 
 config SWAP
 	def_bool n

arch/microblaze/kernel/entry-nommu.S

@@ -124,6 +124,7 @@ ret_from_intr:
 	lwi	r11, r1, PT_MODE
 	bneid	r11, no_intr_resched
 
+3:
 	lwi	r6, r31, TS_THREAD_INFO	/* get thread info */
 	lwi	r19, r6, TI_FLAGS	/* get flags in thread info */
 				/* do an extra work if any bits are set */
@@ -132,11 +133,13 @@ ret_from_intr:
 	beqi	r11, 1f
 	bralid	r15, schedule
 	nop
+	bri	3b
 1:	andi	r11, r19, _TIF_SIGPENDING | _TIF_NOTIFY_RESUME
 	beqid	r11, no_intr_resched
 	addk	r5, r1, r0
 	bralid	r15, do_notify_resume
 	addk	r6, r0, r0
+	bri	3b
 
 no_intr_resched:
 	/* Disable interrupts, we are now committed to the state restore */
@@ -280,6 +283,7 @@ ENTRY(_user_exception)
 	/* Figure out which function to use for this system call. */
 	/* Note Microblaze barrel shift is optional, so don't rely on it */
 	add	r12, r12, r12			/* convert num -> ptr */
+	addik	r30, r0, 1			/* restarts allowed */
 	add	r12, r12, r12
 	lwi	r12, r12, sys_call_table	/* Get function pointer */
 	addik	r15, r0, ret_to_user-8		/* set return address */
@@ -369,6 +373,7 @@ ENTRY(_debug_exception)
 	bralid	r15, send_sig
 	add	r7, r0, r0			/* 3rd param zero */
 
+	addik	r30, r0, 1			/* restarts allowed ??? */
 	/* Restore r3/r4 to work around how ret_to_user works */
 	lwi	r3, r1, PT_R3
 	lwi	r4, r1, PT_R4
@@ -482,18 +487,26 @@ ENTRY(ret_from_kernel_thread)
 	addk	r3, r0, r0
 
 work_pending:
+	lwi	r11, r1, PT_MODE
+	bneid	r11, 2f
+3:
 	enable_irq
-
 	andi	r11, r19, _TIF_NEED_RESCHED
 	beqi	r11, 1f
 	bralid	r15, schedule
 	nop
+	bri	4f
 1:	andi	r11, r19, _TIF_SIGPENDING | _TIF_NOTIFY_RESUME
 	beqi	r11, no_work_pending
-	addk	r5, r1, r0
+	addk	r5, r30, r0
 	bralid	r15, do_notify_resume
 	addik	r6, r0, 1
-	bri	no_work_pending
+	addk	r30, r0, r0	/* no restarts from now on */
+4:
+	disable_irq
+	lwi	r6, r31, TS_THREAD_INFO /* get thread info */
+	lwi	r19, r6, TI_FLAGS /* get flags in thread info */
+	bri	3b
 
 ENTRY(ret_to_user)
 	disable_irq
@@ -507,6 +520,7 @@ ENTRY(ret_to_user)
 no_work_pending:
 	disable_irq
 
+2:
 	/* save r31 */
 	swi	r31, r0, PER_CPU(CURRENT_SAVE)
 	/* save mode indicator */
@@ -559,6 +573,7 @@ no_work_pending:
 	nop
 
 sys_rt_sigreturn_wrapper:
+	addk	r30, r0, r0		/* no restarts for this one */
 	brid	sys_rt_sigreturn
 	addk	r5, r1, r0
 

arch/microblaze/kernel/entry.S

@@ -354,6 +354,7 @@ C_ENTRY(_user_exception):
 	/* Note Microblaze barrel shift is optional, so don't rely on it */
 	add	r12, r12, r12;			/* convert num -> ptr */
 	add	r12, r12, r12;
+	addi	r30, r0, 1			/* restarts allowed */
 
 #ifdef DEBUG
 	/* Trac syscalls and stored them to syscall_debug_table */
@@ -401,26 +402,27 @@ C_ENTRY(ret_from_trap):
 	 * trigger rescheduling. */
 	/* get thread info from current task */
 	lwi	r11, CURRENT_TASK, TS_THREAD_INFO;
-	lwi	r11, r11, TI_FLAGS;		/* get flags in thread info */
-	andi	r11, r11, _TIF_NEED_RESCHED;
+	lwi	r19, r11, TI_FLAGS;		/* get flags in thread info */
+	andi	r11, r19, _TIF_NEED_RESCHED;
 	beqi	r11, 5f;
 
 	bralid	r15, schedule;	/* Call scheduler */
 	nop;				/* delay slot */
+	bri	1b
 
 	/* Maybe handle a signal */
-5:	/* get thread info from current task*/
-	lwi	r11, CURRENT_TASK, TS_THREAD_INFO;
-	lwi	r11, r11, TI_FLAGS;	/* get flags in thread info */
-	andi	r11, r11, _TIF_SIGPENDING | _TIF_NOTIFY_RESUME;
-	beqi	r11, 1f;		/* Signals to handle, handle them */
+5:	
+	andi	r11, r19, _TIF_SIGPENDING | _TIF_NOTIFY_RESUME;
+	beqi	r11, 4f;		/* Signals to handle, handle them */
 
 	addik	r5, r1, 0;		/* Arg 1: struct pt_regs *regs */
 	bralid	r15, do_notify_resume;	/* Handle any signals */
-	addi	r6, r0, 1;		/* Arg 2: int in_syscall */
+	add	r6, r30, r0;		/* Arg 2: int in_syscall */
+	add	r30, r0, r0		/* no more restarts */
+	bri	1b
 
 /* Finally, return to user state.  */
-1:	set_bip;			/*  Ints masked for state restore */
+4:	set_bip;			/*  Ints masked for state restore */
 	swi	CURRENT_TASK, r0, PER_CPU(CURRENT_SAVE); /* save current */
 	VM_OFF;
 	tophys(r1,r1);
@@ -464,6 +466,7 @@ C_ENTRY(ret_from_kernel_thread):
 	add	r3, r0, r0
 
 C_ENTRY(sys_rt_sigreturn_wrapper):
+	addik	r30, r0, 0		/* no restarts */
 	brid	sys_rt_sigreturn	/* Do real work */
 	addik	r5, r1, 0;		/* add user context as 1st arg */
 
@@ -571,20 +574,20 @@ C_ENTRY(ret_from_exc):
 
 	/* We're returning to user mode, so check for various conditions that
 	   trigger rescheduling. */
+1:
 	lwi	r11, CURRENT_TASK, TS_THREAD_INFO;	/* get thread info */
-	lwi	r11, r11, TI_FLAGS;	/* get flags in thread info */
-	andi	r11, r11, _TIF_NEED_RESCHED;
+	lwi	r19, r11, TI_FLAGS;	/* get flags in thread info */
+	andi	r11, r19, _TIF_NEED_RESCHED;
 	beqi	r11, 5f;
 
 /* Call the scheduler before returning from a syscall/trap. */
 	bralid	r15, schedule;	/* Call scheduler */
 	nop;				/* delay slot */
+	bri	1b
 
 	/* Maybe handle a signal */
-5:	lwi	r11, CURRENT_TASK, TS_THREAD_INFO;	/* get thread info */
-	lwi	r11, r11, TI_FLAGS;	/* get flags in thread info */
-	andi	r11, r11, _TIF_SIGPENDING | _TIF_NOTIFY_RESUME;
-	beqi	r11, 1f;		/* Signals to handle, handle them */
+5:	andi	r11, r19, _TIF_SIGPENDING | _TIF_NOTIFY_RESUME;
+	beqi	r11, 4f;		/* Signals to handle, handle them */
 
 	/*
 	 * Handle a signal return; Pending signals should be in r18.
@@ -600,9 +603,10 @@ C_ENTRY(ret_from_exc):
 	addik	r5, r1, 0;		/* Arg 1: struct pt_regs *regs */
 	bralid	r15, do_notify_resume;	/* Handle any signals */
 	addi	r6, r0, 0;		/* Arg 2: int in_syscall */
+	bri	1b
 
 /* Finally, return to user state.  */
-1:	set_bip;			/* Ints masked for state restore */
+4:	set_bip;			/* Ints masked for state restore */
 	swi	CURRENT_TASK, r0, PER_CPU(CURRENT_SAVE); /* save current */
 	VM_OFF;
 	tophys(r1,r1);
@@ -682,22 +686,23 @@ ret_from_irq:
 	lwi	r11, r1, PT_MODE;
 	bnei	r11, 2f;
 
+1:
 	lwi	r11, CURRENT_TASK, TS_THREAD_INFO;
-	lwi	r11, r11, TI_FLAGS; /* MS: get flags from thread info */
-	andi	r11, r11, _TIF_NEED_RESCHED;
+	lwi	r19, r11, TI_FLAGS; /* MS: get flags from thread info */
+	andi	r11, r19, _TIF_NEED_RESCHED;
 	beqi	r11, 5f
 	bralid	r15, schedule;
 	nop; /* delay slot */
+	bri	1b
 
     /* Maybe handle a signal */
-5:	lwi	r11, CURRENT_TASK, TS_THREAD_INFO; /* MS: get thread info */
-	lwi	r11, r11, TI_FLAGS; /* get flags in thread info */
-	andi	r11, r11, _TIF_SIGPENDING | _TIF_NOTIFY_RESUME;
+5:	andi	r11, r19, _TIF_SIGPENDING | _TIF_NOTIFY_RESUME;
 	beqid	r11, no_intr_resched
 /* Handle a signal return; Pending signals should be in r18. */
 	addik	r5, r1, 0; /* Arg 1: struct pt_regs *regs */
 	bralid	r15, do_notify_resume;	/* Handle any signals */
 	addi	r6, r0, 0; /* Arg 2: int in_syscall */
+	bri	1b
 
 /* Finally, return to user state. */
 no_intr_resched:
@@ -815,28 +820,29 @@ dbtrap_call: /* Return point for kernel/user entry + 8 because of rtsd r15, 8 */
 	lwi	r11, r1, PT_MODE;
 	bnei	r11, 2f;
 /* MS: Return to user space - gdb */
+1:
 	/* Get current task ptr into r11 */
 	lwi	r11, CURRENT_TASK, TS_THREAD_INFO;	/* get thread info */
-	lwi	r11, r11, TI_FLAGS;	/* get flags in thread info */
-	andi	r11, r11, _TIF_NEED_RESCHED;
+	lwi	r19, r11, TI_FLAGS;	/* get flags in thread info */
+	andi	r11, r19, _TIF_NEED_RESCHED;
 	beqi	r11, 5f;
 
 	/* Call the scheduler before returning from a syscall/trap. */
 	bralid	r15, schedule;	/* Call scheduler */
 	nop;				/* delay slot */
+	bri	1b
 
 	/* Maybe handle a signal */
-5:	lwi	r11, CURRENT_TASK, TS_THREAD_INFO;	/* get thread info */
-	lwi	r11, r11, TI_FLAGS;	/* get flags in thread info */
-	andi	r11, r11, _TIF_SIGPENDING | _TIF_NOTIFY_RESUME;
-	beqi	r11, 1f;		/* Signals to handle, handle them */
+5:	andi	r11, r19, _TIF_SIGPENDING | _TIF_NOTIFY_RESUME;
+	beqi	r11, 4f;		/* Signals to handle, handle them */
 
 	addik	r5, r1, 0;		/* Arg 1: struct pt_regs *regs */
 	bralid	r15, do_notify_resume;	/* Handle any signals */
 	addi  r6, r0, 0;	/* Arg 2: int in_syscall */
+	bri	1b
 
 /* Finally, return to user state.  */
-1:	swi	CURRENT_TASK, r0, PER_CPU(CURRENT_SAVE); /* save current */
+4:	swi	CURRENT_TASK, r0, PER_CPU(CURRENT_SAVE); /* save current */
 	VM_OFF;
 	tophys(r1,r1);
 	/* MS: Restore all regs */

arch/microblaze/kernel/ptrace.c

@@ -164,29 +164,6 @@ asmlinkage void do_syscall_trace_leave(struct pt_regs *regs)
 		tracehook_report_syscall_exit(regs, step);
 }
 
-#if 0
-static asmlinkage void syscall_trace(void)
-{
-	if (!test_thread_flag(TIF_SYSCALL_TRACE))
-		return;
-	if (!(current->ptrace & PT_PTRACED))
-		return;
-	/* The 0x80 provides a way for the tracing parent to distinguish
-	 between a syscall stop and SIGTRAP delivery */
-	ptrace_notify(SIGTRAP | ((current->ptrace & PT_TRACESYSGOOD)
-				? 0x80 : 0));
-	/*
-	 * this isn't the same as continuing with a signal, but it will do
-	 * for normal use. strace only continues with a signal if the
-	 * stopping signal is not SIGTRAP. -brl
-	 */
-	if (current->exit_code) {
-		send_sig(current->exit_code, current, 1);
-		current->exit_code = 0;
-	}
-}
-#endif
-
 void ptrace_disable(struct task_struct *child)
 {
 	/* nothing to do */

arch/microblaze/kernel/signal.c

@@ -41,13 +41,6 @@
 #include <asm/cacheflush.h>
 #include <asm/syscalls.h>
 
-asmlinkage long
-sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss,
-		struct pt_regs *regs)
-{
-	return do_sigaltstack(uss, uoss, regs->r1);
-}
-
 /*
  * Do a signal return; undo the signal stack.
  */
@@ -109,9 +102,7 @@ asmlinkage long sys_rt_sigreturn(struct pt_regs *regs)
 	if (restore_sigcontext(regs, &frame->uc.uc_mcontext, &rval))
 		goto badframe;
 
-	/* It is more difficult to avoid calling this function than to
-	 call it and ignore errors. */
-	if (do_sigaltstack(&frame->uc.uc_stack, NULL, regs->r1) == -EFAULT)
+	if (restore_altstack(&frame->uc.uc_stack))
 		goto badframe;
 
 	return rval;
@@ -194,11 +185,7 @@ static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
 	/* Create the ucontext. */
 	err |= __put_user(0, &frame->uc.uc_flags);
 	err |= __put_user(NULL, &frame->uc.uc_link);
-	err |= __put_user((void __user *)current->sas_ss_sp,
-			&frame->uc.uc_stack.ss_sp);
-	err |= __put_user(sas_ss_flags(regs->r1),
-			&frame->uc.uc_stack.ss_flags);
-	err |= __put_user(current->sas_ss_size, &frame->uc.uc_stack.ss_size);
+	err |= __save_altstack(&frame->uc.uc_stack, regs->r1);
 	err |= setup_sigcontext(&frame->uc.uc_mcontext,
 			regs, set->sig[0]);
 	err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));
@@ -356,15 +343,6 @@ static void do_signal(struct pt_regs *regs, int in_syscall)
 
 asmlinkage void do_notify_resume(struct pt_regs *regs, int in_syscall)
 {
-	/*
-	 * We want the common case to go fast, which
-	 * is why we may in certain cases get here from
-	 * kernel mode. Just return without doing anything
-	 * if so.
-	 */
-	if (kernel_mode(regs))
-		return;
-
 	if (test_thread_flag(TIF_SIGPENDING))
 		do_signal(regs, in_syscall);
 

arch/mips/Kconfig

@@ -41,6 +41,12 @@ config MIPS
 	select HAVE_MOD_ARCH_SPECIFIC
 	select MODULES_USE_ELF_REL if MODULES
 	select MODULES_USE_ELF_RELA if MODULES && 64BIT
+	select CLONE_BACKWARDS
+	select GENERIC_SIGALTSTACK
+	select GENERIC_COMPAT_RT_SIGACTION
+	select GENERIC_COMPAT_RT_SIGQUEUEINFO
+	select GENERIC_COMPAT_RT_SIGPROCMASK
+	select GENERIC_COMPAT_RT_SIGPENDING
 
 menu "Machine selection"
 

arch/mips/include/asm/compat.h

@@ -288,6 +288,14 @@ struct compat_shmid64_ds {
 	compat_ulong_t	__unused2;
 };
 
+/* MIPS has unusual order of fields in stack_t */
+typedef struct compat_sigaltstack {
+	compat_uptr_t			ss_sp;
+	compat_size_t			ss_size;
+	int				ss_flags;
+} compat_stack_t;
+#define compat_sigaltstack compat_sigaltstack
+
 static inline int is_compat_task(void)
 {
 	return test_thread_flag(TIF_32BIT_ADDR);

arch/mips/include/asm/sim.h

@@ -20,10 +20,10 @@
 #define save_static_function(symbol)					\
 __asm__(								\
 	".text\n\t"							\
-	".globl\t" #symbol "\n\t"					\
+	".globl\t__" #symbol "\n\t"					\
 	".align\t2\n\t"							\
-	".type\t" #symbol ", @function\n\t"				\
-	".ent\t" #symbol ", 0\n"					\
+	".type\t__" #symbol ", @function\n\t"				\
+	".ent\t__" #symbol ", 0\n__"					\
 	#symbol":\n\t"							\
 	".frame\t$29, 0, $31\n\t"					\
 	"sw\t$16,"__str(PT_R16)"($29)\t\t\t# save_static_function\n\t"	\
@@ -35,9 +35,9 @@ __asm__(								\
 	"sw\t$22,"__str(PT_R22)"($29)\n\t"				\
 	"sw\t$23,"__str(PT_R23)"($29)\n\t"				\
 	"sw\t$30,"__str(PT_R30)"($29)\n\t"				\
-	"j\t_" #symbol "\n\t"						\
-	".end\t" #symbol "\n\t"						\
-	".size\t" #symbol",. - " #symbol)
+	"j\t" #symbol "\n\t"						\
+	".end\t__" #symbol "\n\t"					\
+	".size\t__" #symbol",. - __" #symbol)
 
 #define nabi_no_regargs
 
@@ -48,10 +48,10 @@ __asm__(								\
 #define save_static_function(symbol)					\
 __asm__(								\
 	".text\n\t"							\
-	".globl\t" #symbol "\n\t"					\
+	".globl\t__" #symbol "\n\t"					\
 	".align\t2\n\t"							\
-	".type\t" #symbol ", @function\n\t"				\
-	".ent\t" #symbol ", 0\n"					\
+	".type\t__" #symbol ", @function\n\t"				\
+	".ent\t__" #symbol ", 0\n__"					\
 	#symbol":\n\t"							\
 	".frame\t$29, 0, $31\n\t"					\
 	"sd\t$16,"__str(PT_R16)"($29)\t\t\t# save_static_function\n\t"	\
@@ -63,9 +63,9 @@ __asm__(								\
 	"sd\t$22,"__str(PT_R22)"($29)\n\t"				\
 	"sd\t$23,"__str(PT_R23)"($29)\n\t"				\
 	"sd\t$30,"__str(PT_R30)"($29)\n\t"				\
-	"j\t_" #symbol "\n\t"						\
-	".end\t" #symbol "\n\t"						\
-	".size\t" #symbol",. - " #symbol)
+	"j\t" #symbol "\n\t"						\
+	".end\t__" #symbol "\n\t"					\
+	".size\t__" #symbol",. - __" #symbol)
 
 #define nabi_no_regargs							\
 	unsigned long __dummy0,						\

arch/mips/include/asm/unistd.h

@@ -43,6 +43,8 @@
 # ifdef CONFIG_MIPS32_O32
 #  define __ARCH_WANT_COMPAT_SYS_TIME
 # endif
+#define __ARCH_WANT_SYS_FORK
+#define __ARCH_WANT_SYS_CLONE
 
 /* whitelists for checksyscalls */
 #define __IGNORE_select

arch/mips/kernel/linux32.c

@@ -119,22 +119,6 @@ SYSCALL_DEFINE6(32_pwrite, unsigned int, fd, const char __user *, buf,
 	return sys_pwrite64(fd, buf, count, merge_64(a4, a5));
 }
 
-SYSCALL_DEFINE2(32_sched_rr_get_interval, compat_pid_t, pid,
-	struct compat_timespec __user *, interval)
-{
-	struct timespec t;
-	int ret;
-	mm_segment_t old_fs = get_fs();
-
-	set_fs(KERNEL_DS);
-	ret = sys_sched_rr_get_interval(pid, (struct timespec __user *)&t);
-	set_fs(old_fs);
-	if (put_user (t.tv_sec, &interval->tv_sec) ||
-	    __put_user(t.tv_nsec, &interval->tv_nsec))
-		return -EFAULT;
-	return ret;
-}
-
 #ifdef CONFIG_SYSVIPC
 
 SYSCALL_DEFINE6(32_ipc, u32, call, long, first, long, second, long, third,
@@ -295,27 +279,6 @@ asmlinkage long sys32_fallocate(int fd, int mode, unsigned offset_a2,
 	                     merge_64(len_a4, len_a5));
 }
 
-save_static_function(sys32_clone);
-static int noinline __used
-_sys32_clone(nabi_no_regargs struct pt_regs regs)
-{
-	unsigned long clone_flags;
-	unsigned long newsp;
-	int __user *parent_tidptr, *child_tidptr;
-
-	clone_flags = regs.regs[4];
-	newsp = regs.regs[5];
-	if (!newsp)
-		newsp = regs.regs[29];
-	parent_tidptr = (int __user *) regs.regs[6];
-
-	/* Use __dummy4 instead of getting it off the stack, so that
-	   syscall() works.  */
-	child_tidptr = (int __user *) __dummy4;
-	return do_fork(clone_flags, newsp, 0,
-	               parent_tidptr, child_tidptr);
-}
-
 asmlinkage long sys32_lookup_dcookie(u32 a0, u32 a1, char __user *buf,
 	size_t len)
 {
@@ -328,10 +291,3 @@ SYSCALL_DEFINE6(32_fanotify_mark, int, fanotify_fd, unsigned int, flags,
 	return sys_fanotify_mark(fanotify_fd, flags, merge_64(a3, a4),
 				 dfd, pathname);
 }
-
-SYSCALL_DEFINE6(32_futex, u32 __user *, uaddr, int, op, u32, val,
-		struct compat_timespec __user *, utime, u32 __user *, uaddr2,
-		u32, val3)
-{
-	return compat_sys_futex(uaddr, op, val, utime, uaddr2, val3);
-}

arch/mips/kernel/process.c

@@ -156,7 +156,8 @@ int copy_thread(unsigned long clone_flags, unsigned long usp,
 	*childregs = *regs;
 	childregs->regs[7] = 0;	/* Clear error flag */
 	childregs->regs[2] = 0;	/* Child gets zero as return value */
-	childregs->regs[29] = usp;
+	if (usp)
+		childregs->regs[29] = usp;
 	ti->addr_limit = USER_DS;
 
 	p->thread.reg29 = (unsigned long) childregs;

arch/mips/kernel/scall32-o32.S

@@ -226,7 +226,7 @@ einval:	li	v0, -ENOSYS
 	.macro	syscalltable
 	sys	sys_syscall		8	/* 4000 */
 	sys	sys_exit		1
-	sys	sys_fork		0
+	sys	__sys_fork		0
 	sys	sys_read		3
 	sys	sys_write		3
 	sys	sys_open		3	/* 4005 */
@@ -344,7 +344,7 @@ einval:	li	v0, -ENOSYS
 	sys	sys_ipc			6
 	sys	sys_fsync		1
 	sys	sys_sigreturn		0
-	sys	sys_clone		0	/* 4120 */
+	sys	__sys_clone		6	/* 4120 */
 	sys	sys_setdomainname	2
 	sys	sys_newuname		1
 	sys	sys_ni_syscall		0	/* sys_modify_ldt */

arch/mips/kernel/scall64-64.S

@@ -170,8 +170,8 @@ sys_call_table:
 	PTR	sys_socketpair
 	PTR	sys_setsockopt
 	PTR	sys_getsockopt
-	PTR	sys_clone			/* 5055 */
-	PTR	sys_fork
+	PTR	__sys_clone			/* 5055 */
+	PTR	__sys_fork
 	PTR	sys_execve
 	PTR	sys_exit
 	PTR	sys_wait4

arch/mips/kernel/scall64-n32.S

@@ -117,8 +117,8 @@ EXPORT(sysn32_call_table)
 	PTR	sys_mprotect			/* 6010 */
 	PTR	sys_munmap
 	PTR	sys_brk
-	PTR	sys_32_rt_sigaction
-	PTR	sys_32_rt_sigprocmask
+	PTR	compat_sys_rt_sigaction
+	PTR	compat_sys_rt_sigprocmask
 	PTR	compat_sys_ioctl		/* 6015 */
 	PTR	sys_pread64
 	PTR	sys_pwrite64
@@ -159,8 +159,8 @@ EXPORT(sysn32_call_table)
 	PTR	sys_socketpair
 	PTR	compat_sys_setsockopt
 	PTR	sys_getsockopt
-	PTR	sys_clone			/* 6055 */
-	PTR	sys_fork
+	PTR	__sys_clone			/* 6055 */
+	PTR	__sys_fork
 	PTR	compat_sys_execve
 	PTR	sys_exit
 	PTR	compat_sys_wait4
@@ -229,11 +229,11 @@ EXPORT(sysn32_call_table)
 	PTR	sys_getsid
 	PTR	sys_capget
 	PTR	sys_capset
-	PTR	sys_32_rt_sigpending		/* 6125 */
+	PTR	compat_sys_rt_sigpending	/* 6125 */
 	PTR	compat_sys_rt_sigtimedwait
-	PTR	sys_32_rt_sigqueueinfo
-	PTR	sysn32_rt_sigsuspend
-	PTR	sys32_sigaltstack
+	PTR	compat_sys_rt_sigqueueinfo
+	PTR	compat_sys_rt_sigsuspend
+	PTR	compat_sys_sigaltstack
 	PTR	compat_sys_utime		/* 6130 */
 	PTR	sys_mknod
 	PTR	sys_32_personality
@@ -249,7 +249,7 @@ EXPORT(sysn32_call_table)
 	PTR	sys_sched_getscheduler
 	PTR	sys_sched_get_priority_max
 	PTR	sys_sched_get_priority_min
-	PTR	sys_32_sched_rr_get_interval	/* 6145 */
+	PTR	compat_sys_sched_rr_get_interval	/* 6145 */
 	PTR	sys_mlock
 	PTR	sys_munlock
 	PTR	sys_mlockall
@@ -298,7 +298,7 @@ EXPORT(sysn32_call_table)
 	PTR	sys_fremovexattr
 	PTR	sys_tkill
 	PTR	sys_ni_syscall
-	PTR	sys_32_futex
+	PTR	compat_sys_futex
 	PTR	compat_sys_sched_setaffinity	/* 6195 */
 	PTR	compat_sys_sched_getaffinity
 	PTR	sys_cacheflush

arch/mips/kernel/scall64-o32.S

@@ -194,7 +194,7 @@ einval:	li	v0, -ENOSYS
 sys_call_table:
 	PTR	sys32_syscall			/* 4000 */
 	PTR	sys_exit
-	PTR	sys_fork
+	PTR	__sys_fork
 	PTR	sys_read
 	PTR	sys_write
 	PTR	compat_sys_open			/* 4005 */
@@ -312,7 +312,7 @@ sys_call_table:
 	PTR	sys_32_ipc
 	PTR	sys_fsync
 	PTR	sys32_sigreturn
-	PTR	sys32_clone			/* 4120 */
+	PTR	__sys_clone			/* 4120 */
 	PTR	sys_setdomainname
 	PTR	sys_newuname
 	PTR	sys_ni_syscall			/* sys_modify_ldt */
@@ -357,7 +357,7 @@ sys_call_table:
 	PTR	sys_sched_yield
 	PTR	sys_sched_get_priority_max
 	PTR	sys_sched_get_priority_min
-	PTR	sys_32_sched_rr_get_interval 	/* 4165 */
+	PTR	compat_sys_sched_rr_get_interval 	/* 4165 */
 	PTR	compat_sys_nanosleep
 	PTR	sys_mremap
 	PTR	sys_accept
@@ -386,19 +386,19 @@ sys_call_table:
 	PTR	sys_getresgid
 	PTR	sys_prctl
 	PTR	sys32_rt_sigreturn
-	PTR	sys_32_rt_sigaction
-	PTR	sys_32_rt_sigprocmask 		/* 4195 */
-	PTR	sys_32_rt_sigpending
+	PTR	compat_sys_rt_sigaction
+	PTR	compat_sys_rt_sigprocmask 	/* 4195 */
+	PTR	compat_sys_rt_sigpending
 	PTR	compat_sys_rt_sigtimedwait
-	PTR	sys_32_rt_sigqueueinfo
-	PTR	sys32_rt_sigsuspend
+	PTR	compat_sys_rt_sigqueueinfo
+	PTR	compat_sys_rt_sigsuspend
 	PTR	sys_32_pread			/* 4200 */
 	PTR	sys_32_pwrite
 	PTR	sys_chown
 	PTR	sys_getcwd
 	PTR	sys_capget
 	PTR	sys_capset			/* 4205 */
-	PTR	sys32_sigaltstack
+	PTR	compat_sys_sigaltstack
 	PTR	sys_32_sendfile
 	PTR	sys_ni_syscall
 	PTR	sys_ni_syscall
@@ -430,7 +430,7 @@ sys_call_table:
 	PTR	sys_fremovexattr		/* 4235 */
 	PTR	sys_tkill
 	PTR	sys_sendfile64
-	PTR	sys_32_futex
+	PTR	compat_sys_futex
 	PTR	compat_sys_sched_setaffinity
 	PTR	compat_sys_sched_getaffinity	/* 4240 */
 	PTR	compat_sys_io_setup
@@ -470,7 +470,7 @@ sys_call_table:
 	PTR	compat_sys_mq_notify		/* 4275 */
 	PTR	compat_sys_mq_getsetattr
 	PTR	sys_ni_syscall			/* sys_vserver */
-	PTR	sys_32_waitid
+	PTR	compat_sys_waitid
 	PTR	sys_ni_syscall			/* available, was setaltroot */
 	PTR	sys_add_key			/* 4280 */
 	PTR	sys_request_key

arch/mips/kernel/signal.c

@@ -247,31 +247,12 @@ void __user *get_sigframe(struct k_sigaction *ka, struct pt_regs *regs,
  */
 
 #ifdef CONFIG_TRAD_SIGNALS
-asmlinkage int sys_sigsuspend(nabi_no_regargs struct pt_regs regs)
+SYSCALL_DEFINE1(sigsuspend, sigset_t __user *, uset)
 {
-	sigset_t newset;
-	sigset_t __user *uset;
-
-	uset = (sigset_t __user *) regs.regs[4];
-	if (copy_from_user(&newset, uset, sizeof(sigset_t)))
-		return -EFAULT;
-	return sigsuspend(&newset);
+	return sys_rt_sigsuspend(uset, sizeof(sigset_t));
 }
 #endif
 
-SYSCALL_DEFINE2(rt_sigsuspend, sigset_t __user *,unewset, size_t, sigsetsize)
-{
-	sigset_t newset;
-
-	/* XXX Don't preclude handling different sized sigset_t's.  */
-	if (sigsetsize != sizeof(sigset_t))
-		return -EINVAL;
-
-	if (copy_from_user(&newset, unewset, sizeof(newset)))
-		return -EFAULT;
-	return sigsuspend(&newset);
-}
-
 #ifdef CONFIG_TRAD_SIGNALS
 SYSCALL_DEFINE3(sigaction, int, sig, const struct sigaction __user *, act,
 	struct sigaction __user *, oact)
@@ -313,15 +294,6 @@ SYSCALL_DEFINE3(sigaction, int, sig, const struct sigaction __user *, act,
 }
 #endif
 
-asmlinkage int sys_sigaltstack(nabi_no_regargs struct pt_regs regs)
-{
-	const stack_t __user *uss = (const stack_t __user *) regs.regs[4];
-	stack_t __user *uoss = (stack_t __user *) regs.regs[5];
-	unsigned long usp = regs.regs[29];
-
-	return do_sigaltstack(uss, uoss, usp);
-}
-
 #ifdef CONFIG_TRAD_SIGNALS
 asmlinkage void sys_sigreturn(nabi_no_regargs struct pt_regs regs)
 {
@@ -378,9 +350,8 @@ asmlinkage void sys_rt_sigreturn(nabi_no_regargs struct pt_regs regs)
 	else if (sig)
 		force_sig(sig, current);
 
-	/* It is more difficult to avoid calling this function than to
-	   call it and ignore errors.  */
-	do_sigaltstack(&frame->rs_uc.uc_stack, NULL, regs.regs[29]);
+	if (restore_altstack(&frame->rs_uc.uc_stack))
+		goto badframe;
 
 	/*
 	 * Don't let your children do this ...
@@ -457,12 +428,7 @@ static int setup_rt_frame(void *sig_return, struct k_sigaction *ka,
 	/* Create the ucontext.  */
 	err |= __put_user(0, &frame->rs_uc.uc_flags);
 	err |= __put_user(NULL, &frame->rs_uc.uc_link);
-	err |= __put_user((void __user *)current->sas_ss_sp,
-	                  &frame->rs_uc.uc_stack.ss_sp);
-	err |= __put_user(sas_ss_flags(regs->regs[29]),
-	                  &frame->rs_uc.uc_stack.ss_flags);
-	err |= __put_user(current->sas_ss_size,
-	                  &frame->rs_uc.uc_stack.ss_size);
+	err |= __save_altstack(&frame->rs_uc.uc_stack, regs->regs[29]);
 	err |= setup_sigcontext(regs, &frame->rs_uc.uc_mcontext);
 	err |= __copy_to_user(&frame->rs_uc.uc_sigmask, set, sizeof(*set));
 

arch/mips/kernel/signal32.c

@@ -55,23 +55,10 @@ extern asmlinkage int fpu_emulator_restore_context32(struct sigcontext32 __user
 typedef unsigned int __sighandler32_t;
 typedef void (*vfptr_t)(void);
 
-struct sigaction32 {
-	unsigned int		sa_flags;
-	__sighandler32_t	sa_handler;
-	compat_sigset_t		sa_mask;
-};
-
-/* IRIX compatible stack_t  */
-typedef struct sigaltstack32 {
-	s32 ss_sp;
-	compat_size_t ss_size;
-	int ss_flags;
-} stack32_t;
-
 struct ucontext32 {
 	u32                 uc_flags;
 	s32                 uc_link;
-	stack32_t           uc_stack;
+	compat_stack_t      uc_stack;
 	struct sigcontext32 uc_mcontext;
 	compat_sigset_t     uc_sigmask;   /* mask last for extensibility */
 };
@@ -280,36 +267,13 @@ static inline int get_sigset(sigset_t *kbuf, const compat_sigset_t __user *ubuf)
  * Atomically swap in the new signal mask, and wait for a signal.
  */
 
-asmlinkage int sys32_sigsuspend(nabi_no_regargs struct pt_regs regs)
+asmlinkage int sys32_sigsuspend(compat_sigset_t __user *uset)
 {
-	compat_sigset_t __user *uset;
-	sigset_t newset;
-
-	uset = (compat_sigset_t __user *) regs.regs[4];
-	if (get_sigset(&newset, uset))
-		return -EFAULT;
-	return sigsuspend(&newset);
-}
-
-asmlinkage int sys32_rt_sigsuspend(nabi_no_regargs struct pt_regs regs)
-{
-	compat_sigset_t __user *uset;
-	sigset_t newset;
-	size_t sigsetsize;
-
-	/* XXX Don't preclude handling different sized sigset_t's.  */
-	sigsetsize = regs.regs[5];
-	if (sigsetsize != sizeof(compat_sigset_t))
-		return -EINVAL;
-
-	uset = (compat_sigset_t __user *) regs.regs[4];
-	if (get_sigset(&newset, uset))
-		return -EFAULT;
-	return sigsuspend(&newset);
+	return compat_sys_rt_sigsuspend(uset, sizeof(compat_sigset_t));
 }
 
-SYSCALL_DEFINE3(32_sigaction, long, sig, const struct sigaction32 __user *, act,
-	struct sigaction32 __user *, oact)
+SYSCALL_DEFINE3(32_sigaction, long, sig, const struct compat_sigaction __user *, act,
+	struct compat_sigaction __user *, oact)
 {
 	struct k_sigaction new_ka, old_ka;
 	int ret;
@@ -350,45 +314,6 @@ SYSCALL_DEFINE3(32_sigaction, long, sig, const struct sigaction32 __user *, act,
 	return ret;
 }
 
-asmlinkage int sys32_sigaltstack(nabi_no_regargs struct pt_regs regs)
-{
-	const stack32_t __user *uss = (const stack32_t __user *) regs.regs[4];
-	stack32_t __user *uoss = (stack32_t __user *) regs.regs[5];
-	unsigned long usp = regs.regs[29];
-	stack_t kss, koss;
-	int ret, err = 0;
-	mm_segment_t old_fs = get_fs();
-	s32 sp;
-
-	if (uss) {
-		if (!access_ok(VERIFY_READ, uss, sizeof(*uss)))
-			return -EFAULT;
-		err |= __get_user(sp, &uss->ss_sp);
-		kss.ss_sp = (void __user *) (long) sp;
-		err |= __get_user(kss.ss_size, &uss->ss_size);
-		err |= __get_user(kss.ss_flags, &uss->ss_flags);
-		if (err)
-			return -EFAULT;
-	}
-
-	set_fs(KERNEL_DS);
-	ret = do_sigaltstack(uss ? (stack_t __user *)&kss : NULL,
-			     uoss ? (stack_t __user *)&koss : NULL, usp);
-	set_fs(old_fs);
-
-	if (!ret && uoss) {
-		if (!access_ok(VERIFY_WRITE, uoss, sizeof(*uoss)))
-			return -EFAULT;
-		sp = (int) (unsigned long) koss.ss_sp;
-		err |= __put_user(sp, &uoss->ss_sp);
-		err |= __put_user(koss.ss_size, &uoss->ss_size);
-		err |= __put_user(koss.ss_flags, &uoss->ss_flags);
-		if (err)
-			return -EFAULT;
-	}
-	return ret;
-}
-
 int copy_siginfo_to_user32(compat_siginfo_t __user *to, siginfo_t *from)
 {
 	int err;
@@ -490,10 +415,7 @@ badframe:
 asmlinkage void sys32_rt_sigreturn(nabi_no_regargs struct pt_regs regs)
 {
 	struct rt_sigframe32 __user *frame;
-	mm_segment_t old_fs;
 	sigset_t set;
-	stack_t st;
-	s32 sp;
 	int sig;
 
 	frame = (struct rt_sigframe32 __user *) regs.regs[29];
@@ -510,22 +432,9 @@ asmlinkage void sys32_rt_sigreturn(nabi_no_regargs struct pt_regs regs)
 	else if (sig)
 		force_sig(sig, current);
 
-	/* The ucontext contains a stack32_t, so we must convert!  */
-	if (__get_user(sp, &frame->rs_uc.uc_stack.ss_sp))
-		goto badframe;
-	st.ss_sp = (void __user *)(long) sp;
-	if (__get_user(st.ss_size, &frame->rs_uc.uc_stack.ss_size))
-		goto badframe;
-	if (__get_user(st.ss_flags, &frame->rs_uc.uc_stack.ss_flags))
+	if (compat_restore_altstack(&frame->rs_uc.uc_stack))
 		goto badframe;
 
-	/* It is more difficult to avoid calling this function than to
-	   call it and ignore errors.  */
-	old_fs = get_fs();
-	set_fs(KERNEL_DS);
-	do_sigaltstack((stack_t __user *)&st, NULL, regs.regs[29]);
-	set_fs(old_fs);
-
 	/*
 	 * Don't let your children do this ...
 	 */
@@ -590,7 +499,6 @@ static int setup_rt_frame_32(void *sig_return, struct k_sigaction *ka,
 {
 	struct rt_sigframe32 __user *frame;
 	int err = 0;
-	s32 sp;
 
 	frame = get_sigframe(ka, regs, sizeof(*frame));
 	if (!access_ok(VERIFY_WRITE, frame, sizeof (*frame)))
@@ -602,13 +510,7 @@ static int setup_rt_frame_32(void *sig_return, struct k_sigaction *ka,
 	/* Create the ucontext.  */
 	err |= __put_user(0, &frame->rs_uc.uc_flags);
 	err |= __put_user(0, &frame->rs_uc.uc_link);
-	sp = (int) (long) current->sas_ss_sp;
-	err |= __put_user(sp,
-	                  &frame->rs_uc.uc_stack.ss_sp);
-	err |= __put_user(sas_ss_flags(regs->regs[29]),
-	                  &frame->rs_uc.uc_stack.ss_flags);
-	err |= __put_user(current->sas_ss_size,
-	                  &frame->rs_uc.uc_stack.ss_size);
+	err |= __compat_save_altstack(&frame->rs_uc.uc_stack, regs->regs[29]);
 	err |= setup_sigcontext32(regs, &frame->rs_uc.uc_mcontext);
 	err |= __copy_conv_sigset_to_user(&frame->rs_uc.uc_sigmask, set);
 
@@ -656,131 +558,6 @@ struct mips_abi mips_abi_32 = {
 	.restart	= __NR_O32_restart_syscall
 };
 
-SYSCALL_DEFINE4(32_rt_sigaction, int, sig,
-	const struct sigaction32 __user *, act,
-	struct sigaction32 __user *, oact, unsigned int, sigsetsize)
-{
-	struct k_sigaction new_sa, old_sa;
-	int ret = -EINVAL;
-
-	/* XXX: Don't preclude handling different sized sigset_t's.  */
-	if (sigsetsize != sizeof(sigset_t))
-		goto out;
-
-	if (act) {
-		s32 handler;
-		int err = 0;
-
-		if (!access_ok(VERIFY_READ, act, sizeof(*act)))
-			return -EFAULT;
-		err |= __get_user(handler, &act->sa_handler);
-		new_sa.sa.sa_handler = (void __user *)(s64)handler;
-		err |= __get_user(new_sa.sa.sa_flags, &act->sa_flags);
-		err |= get_sigset(&new_sa.sa.sa_mask, &act->sa_mask);
-		if (err)
-			return -EFAULT;
-	}
-
-	ret = do_sigaction(sig, act ? &new_sa : NULL, oact ? &old_sa : NULL);
-
-	if (!ret && oact) {
-		int err = 0;
-
-		if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)))
-			return -EFAULT;
-
-		err |= __put_user((u32)(u64)old_sa.sa.sa_handler,
-		                   &oact->sa_handler);
-		err |= __put_user(old_sa.sa.sa_flags, &oact->sa_flags);
-		err |= put_sigset(&old_sa.sa.sa_mask, &oact->sa_mask);
-		if (err)
-			return -EFAULT;
-	}
-out:
-	return ret;
-}
-
-SYSCALL_DEFINE4(32_rt_sigprocmask, int, how, compat_sigset_t __user *, set,
-	compat_sigset_t __user *, oset, unsigned int, sigsetsize)
-{
-	sigset_t old_set, new_set;
-	int ret;
-	mm_segment_t old_fs = get_fs();
-
-	if (set && get_sigset(&new_set, set))
-		return -EFAULT;
-
-	set_fs(KERNEL_DS);
-	ret = sys_rt_sigprocmask(how, set ? (sigset_t __user *)&new_set : NULL,
-				 oset ? (sigset_t __user *)&old_set : NULL,
-				 sigsetsize);
-	set_fs(old_fs);
-
-	if (!ret && oset && put_sigset(&old_set, oset))
-		return -EFAULT;
-
-	return ret;
-}
-
-SYSCALL_DEFINE2(32_rt_sigpending, compat_sigset_t __user *, uset,
-	unsigned int, sigsetsize)
-{
-	int ret;
-	sigset_t set;
-	mm_segment_t old_fs = get_fs();
-
-	set_fs(KERNEL_DS);
-	ret = sys_rt_sigpending((sigset_t __user *)&set, sigsetsize);
-	set_fs(old_fs);
-
-	if (!ret && put_sigset(&set, uset))
-		return -EFAULT;
-
-	return ret;
-}
-
-SYSCALL_DEFINE3(32_rt_sigqueueinfo, int, pid, int, sig,
-	compat_siginfo_t __user *, uinfo)
-{
-	siginfo_t info;
-	int ret;
-	mm_segment_t old_fs = get_fs();
-
-	if (copy_from_user(&info, uinfo, 3*sizeof(int)) ||
-	    copy_from_user(info._sifields._pad, uinfo->_sifields._pad, SI_PAD_SIZE))
-		return -EFAULT;
-	set_fs(KERNEL_DS);
-	ret = sys_rt_sigqueueinfo(pid, sig, (siginfo_t __user *)&info);
-	set_fs(old_fs);
-	return ret;
-}
-
-SYSCALL_DEFINE5(32_waitid, int, which, compat_pid_t, pid,
-	     compat_siginfo_t __user *, uinfo, int, options,
-	     struct compat_rusage __user *, uru)
-{
-	siginfo_t info;
-	struct rusage ru;
-	long ret;
-	mm_segment_t old_fs = get_fs();
-
-	info.si_signo = 0;
-	set_fs(KERNEL_DS);
-	ret = sys_waitid(which, pid, (siginfo_t __user *) &info, options,
-			 uru ? (struct rusage __user *) &ru : NULL);
-	set_fs(old_fs);
-
-	if (ret < 0 || info.si_signo == 0)
-		return ret;
-
-	if (uru && (ret = put_compat_rusage(&ru, uru)))
-		return ret;
-
-	BUG_ON(info.si_code & __SI_MASK);
-	info.si_code |= __SI_CHLD;
-	return copy_siginfo_to_user32(uinfo, &info);
-}
-
 static int signal32_init(void)
 {
 	if (cpu_has_fpu) {

arch/mips/kernel/signal_n32.c

@@ -50,18 +50,10 @@
 extern int setup_sigcontext(struct pt_regs *, struct sigcontext __user *);
 extern int restore_sigcontext(struct pt_regs *, struct sigcontext __user *);
 
-
-/* IRIX compatible stack_t  */
-typedef struct sigaltstack32 {
-	s32 ss_sp;
-	compat_size_t ss_size;
-	int ss_flags;
-} stack32_t;
-
 struct ucontextn32 {
 	u32                 uc_flags;
 	s32                 uc_link;
-	stack32_t           uc_stack;
+	compat_stack_t      uc_stack;
 	struct sigcontext   uc_mcontext;
 	compat_sigset_t     uc_sigmask;   /* mask last for extensibility */
 };
@@ -73,34 +65,10 @@ struct rt_sigframe_n32 {
 	struct ucontextn32 rs_uc;
 };
 
-extern void sigset_from_compat(sigset_t *set, compat_sigset_t *compat);
-
-asmlinkage int sysn32_rt_sigsuspend(nabi_no_regargs struct pt_regs regs)
-{
-	compat_sigset_t __user *unewset;
-	compat_sigset_t uset;
-	size_t sigsetsize;
-	sigset_t newset;
-
-	/* XXX Don't preclude handling different sized sigset_t's.  */
-	sigsetsize = regs.regs[5];
-	if (sigsetsize != sizeof(sigset_t))
-		return -EINVAL;
-
-	unewset = (compat_sigset_t __user *) regs.regs[4];
-	if (copy_from_user(&uset, unewset, sizeof(uset)))
-		return -EFAULT;
-	sigset_from_compat(&newset, &uset);
-	return sigsuspend(&newset);
-}
-
 asmlinkage void sysn32_rt_sigreturn(nabi_no_regargs struct pt_regs regs)
 {
 	struct rt_sigframe_n32 __user *frame;
-	mm_segment_t old_fs;
 	sigset_t set;
-	stack_t st;
-	s32 sp;
 	int sig;
 
 	frame = (struct rt_sigframe_n32 __user *) regs.regs[29];
@@ -117,23 +85,9 @@ asmlinkage void sysn32_rt_sigreturn(nabi_no_regargs struct pt_regs regs)
 	else if (sig)
 		force_sig(sig, current);
 
-	/* The ucontext contains a stack32_t, so we must convert!  */
-	if (__get_user(sp, &frame->rs_uc.uc_stack.ss_sp))
-		goto badframe;
-	st.ss_sp = (void __user *)(long) sp;
-	if (__get_user(st.ss_size, &frame->rs_uc.uc_stack.ss_size))
-		goto badframe;
-	if (__get_user(st.ss_flags, &frame->rs_uc.uc_stack.ss_flags))
+	if (compat_restore_altstack(&frame->rs_uc.uc_stack))
 		goto badframe;
 
-	/* It is more difficult to avoid calling this function than to
-	   call it and ignore errors.  */
-	old_fs = get_fs();
-	set_fs(KERNEL_DS);
-	do_sigaltstack((stack_t __user *)&st, NULL, regs.regs[29]);
-	set_fs(old_fs);
-
-
 	/*
 	 * Don't let your children do this ...
 	 */
@@ -153,7 +107,6 @@ static int setup_rt_frame_n32(void *sig_return, struct k_sigaction *ka,
 {
 	struct rt_sigframe_n32 __user *frame;
 	int err = 0;
-	s32 sp;
 
 	frame = get_sigframe(ka, regs, sizeof(*frame));
 	if (!access_ok(VERIFY_WRITE, frame, sizeof (*frame)))
@@ -165,13 +118,7 @@ static int setup_rt_frame_n32(void *sig_return, struct k_sigaction *ka,
 	/* Create the ucontext.  */
 	err |= __put_user(0, &frame->rs_uc.uc_flags);
 	err |= __put_user(0, &frame->rs_uc.uc_link);
-	sp = (int) (long) current->sas_ss_sp;
-	err |= __put_user(sp,
-	                  &frame->rs_uc.uc_stack.ss_sp);
-	err |= __put_user(sas_ss_flags(regs->regs[29]),
-	                  &frame->rs_uc.uc_stack.ss_flags);
-	err |= __put_user(current->sas_ss_size,
-	                  &frame->rs_uc.uc_stack.ss_size);
+	err |= __compat_save_altstack(&frame->rs_uc.uc_stack, regs->regs[29]);
 	err |= setup_sigcontext(regs, &frame->rs_uc.uc_mcontext);
 	err |= __copy_conv_sigset_to_user(&frame->rs_uc.uc_sigmask, set);
 

arch/mips/kernel/syscall.c

@@ -46,20 +46,14 @@
  * argument.  Historically that used to be expensive in Linux.  These days
  * the performance advantage is negligible.
  */
-asmlinkage int sysm_pipe(nabi_no_regargs volatile struct pt_regs regs)
+asmlinkage int sysm_pipe(void)
 {
 	int fd[2];
-	int error, res;
-
-	error = do_pipe_flags(fd, 0);
-	if (error) {
-		res = error;
-		goto out;
-	}
-	regs.regs[3] = fd[1];
-	res = fd[0];
-out:
-	return res;
+	int error = do_pipe_flags(fd, 0);
+	if (error)
+		return error;
+	current_pt_regs()->regs[3] = fd[1];
+	return fd[0];
 }
 
 SYSCALL_DEFINE6(mips_mmap, unsigned long, addr, unsigned long, len,
@@ -89,43 +83,7 @@ SYSCALL_DEFINE6(mips_mmap2, unsigned long, addr, unsigned long, len,
 }
 
 save_static_function(sys_fork);
-static int __used noinline
-_sys_fork(nabi_no_regargs struct pt_regs regs)
-{
-	return do_fork(SIGCHLD, regs.regs[29], 0, NULL, NULL);
-}
-
 save_static_function(sys_clone);
-static int __used noinline
-_sys_clone(nabi_no_regargs struct pt_regs regs)
-{
-	unsigned long clone_flags;
-	unsigned long newsp;
-	int __user *parent_tidptr, *child_tidptr;
-
-	clone_flags = regs.regs[4];
-	newsp = regs.regs[5];
-	if (!newsp)
-		newsp = regs.regs[29];
-	parent_tidptr = (int __user *) regs.regs[6];
-#ifdef CONFIG_32BIT
-	/* We need to fetch the fifth argument off the stack.  */
-	child_tidptr = NULL;
-	if (clone_flags & (CLONE_CHILD_SETTID | CLONE_CHILD_CLEARTID)) {
-		int __user *__user *usp = (int __user *__user *) regs.regs[29];
-		if (regs.regs[2] == __NR_syscall) {
-			if (get_user (child_tidptr, &usp[5]))
-				return -EFAULT;
-		}
-		else if (get_user (child_tidptr, &usp[4]))
-			return -EFAULT;
-	}
-#else
-	child_tidptr = (int __user *) regs.regs[8];
-#endif
-	return do_fork(clone_flags, newsp, 0,
-	               parent_tidptr, child_tidptr);
-}
 
 SYSCALL_DEFINE1(set_thread_area, unsigned long, addr)
 {
@@ -138,10 +96,10 @@ SYSCALL_DEFINE1(set_thread_area, unsigned long, addr)
 	return 0;
 }
 
-static inline int mips_atomic_set(struct pt_regs *regs,
-	unsigned long addr, unsigned long new)
+static inline int mips_atomic_set(unsigned long addr, unsigned long new)
 {
 	unsigned long old, tmp;
+	struct pt_regs *regs;
 	unsigned int err;
 
 	if (unlikely(addr & 3))
@@ -222,6 +180,7 @@ static inline int mips_atomic_set(struct pt_regs *regs,
 	if (unlikely(err))
 		return err;
 
+	regs = current_pt_regs();
 	regs->regs[2] = old;
 	regs->regs[7] = 0;	/* No error */
 
@@ -235,22 +194,14 @@ static inline int mips_atomic_set(struct pt_regs *regs,
 	: "r" (regs));
 
 	/* unreached.  Honestly.  */
-	while (1);
+	unreachable();
 }
 
-save_static_function(sys_sysmips);
-static int __used noinline
-_sys_sysmips(nabi_no_regargs struct pt_regs regs)
+SYSCALL_DEFINE3(sysmips, long, cmd, long, arg1, long, arg2)
 {
-	long cmd, arg1, arg2;
-
-	cmd = regs.regs[4];
-	arg1 = regs.regs[5];
-	arg2 = regs.regs[6];
-
 	switch (cmd) {
 	case MIPS_ATOMIC_SET:
-		return mips_atomic_set(&regs, arg1, arg2);
+		return mips_atomic_set(arg1, arg2);
 
 	case MIPS_FIXADE:
 		if (arg1 & ~3)

arch/mn10300/Kconfig

@@ -10,6 +10,9 @@ config MN10300
 	select HAVE_NMI_WATCHDOG if MN10300_WD_TIMER
 	select GENERIC_CLOCKEVENTS
 	select MODULES_USE_ELF_RELA
+	select GENERIC_SIGALTSTACK
+	select OLD_SIGSUSPEND3
+	select OLD_SIGACTION
 
 config AM33_2
 	def_bool n

arch/mn10300/include/asm/signal.h

@@ -26,13 +26,6 @@ typedef struct {
 	unsigned long	sig[_NSIG_WORDS];
 } sigset_t;
 
-struct old_sigaction {
-	__sighandler_t sa_handler;
-	old_sigset_t sa_mask;
-	unsigned long sa_flags;
-	__sigrestore_t sa_restorer;
-};
-
 #define __ARCH_HAS_SA_RESTORER
 
 #include <asm/sigcontext.h>

arch/mn10300/kernel/signal.c

@@ -31,59 +31,6 @@
 
 #define DEBUG_SIG 0
 
-/*
- * atomically swap in the new signal mask, and wait for a signal.
- */
-asmlinkage long sys_sigsuspend(int history0, int history1, old_sigset_t mask)
-{
-	sigset_t blocked;
-	siginitset(&blocked, mask);
-	return sigsuspend(&blocked);
-}
-
-/*
- * set signal action syscall
- */
-asmlinkage long sys_sigaction(int sig,
-			      const struct old_sigaction __user *act,
-			      struct old_sigaction __user *oact)
-{
-	struct k_sigaction new_ka, old_ka;
-	int ret;
-
-	if (act) {
-		old_sigset_t mask;
-		if (verify_area(VERIFY_READ, act, sizeof(*act)) ||
-		    __get_user(new_ka.sa.sa_handler, &act->sa_handler) ||
-		    __get_user(new_ka.sa.sa_restorer, &act->sa_restorer) ||
-		    __get_user(new_ka.sa.sa_flags, &act->sa_flags) ||
-		    __get_user(mask, &act->sa_mask))
-			return -EFAULT;
-		siginitset(&new_ka.sa.sa_mask, mask);
-	}
-
-	ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
-
-	if (!ret && oact) {
-		if (verify_area(VERIFY_WRITE, oact, sizeof(*oact)) ||
-		    __put_user(old_ka.sa.sa_handler, &oact->sa_handler) ||
-		    __put_user(old_ka.sa.sa_restorer, &oact->sa_restorer) ||
-		    __put_user(old_ka.sa.sa_flags, &oact->sa_flags) ||
-		    __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask))
-			return -EFAULT;
-	}
-
-	return ret;
-}
-
-/*
- * set alternate signal stack syscall
- */
-asmlinkage long sys_sigaltstack(const stack_t __user *uss, stack_t *uoss)
-{
-	return do_sigaltstack(uss, uoss, current_frame()->sp);
-}
-
 /*
  * do a signal return; undo the signal stack.
  */
@@ -193,8 +140,7 @@ asmlinkage long sys_rt_sigreturn(void)
 	if (restore_sigcontext(current_frame(), &frame->uc.uc_mcontext, &d0))
 		goto badframe;
 
-	if (do_sigaltstack(&frame->uc.uc_stack, NULL, current_frame()->sp) ==
-	    -EFAULT)
+	if (restore_altstack(&frame->uc.uc_stack))
 		goto badframe;
 
 	return d0;
@@ -359,9 +305,7 @@ static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
 	/* create the ucontext.  */
 	if (__put_user(0, &frame->uc.uc_flags) ||
 	    __put_user(0, &frame->uc.uc_link) ||
-	    __put_user((void *)current->sas_ss_sp, &frame->uc.uc_stack.ss_sp) ||
-	    __put_user(sas_ss_flags(regs->sp), &frame->uc.uc_stack.ss_flags) ||
-	    __put_user(current->sas_ss_size, &frame->uc.uc_stack.ss_size) ||
+	    __save_altstack(&frame->uc.uc_stack, regs->sp) ||
 	    setup_sigcontext(&frame->uc.uc_mcontext,
 			     &frame->fpuctx, regs, set->sig[0]) ||
 	    __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set)))

arch/openrisc/Kconfig

@@ -22,6 +22,7 @@ config OPENRISC
 	select GENERIC_STRNCPY_FROM_USER
 	select GENERIC_STRNLEN_USER
 	select MODULES_USE_ELF_RELA
+	select GENERIC_SIGALTSTACK
 
 config MMU
 	def_bool y

arch/openrisc/kernel/entry.S

@@ -1083,10 +1083,6 @@ ENTRY(__sys_fork)
 	l.j	_fork_save_extra_regs_and_call
 	 l.addi	r3,r1,0
 
-ENTRY(sys_sigaltstack)
-	l.j	_sys_sigaltstack
-	 l.addi	r5,r1,0
-
 ENTRY(sys_rt_sigreturn)
 	l.j	_sys_rt_sigreturn
 	 l.addi	r3,r1,0

arch/openrisc/kernel/signal.c

@@ -33,12 +33,6 @@
 
 #define DEBUG_SIG 0
 
-asmlinkage long
-_sys_sigaltstack(const stack_t *uss, stack_t *uoss, struct pt_regs *regs)
-{
-	return do_sigaltstack(uss, uoss, regs->sp);
-}
-
 struct rt_sigframe {
 	struct siginfo *pinfo;
 	void *puc;
@@ -103,9 +97,7 @@ asmlinkage long _sys_rt_sigreturn(struct pt_regs *regs)
 	if (restore_sigcontext(regs, &frame->uc.uc_mcontext))
 		goto badframe;
 
-	/* It is more difficult to avoid calling this function than to
-	   call it and ignore errors.  */
-	if (do_sigaltstack(&frame->uc.uc_stack, NULL, regs->sp) == -EFAULT)
+	if (restore_altstack(&frame->uc.uc_stack))
 		goto badframe;
 
 	return regs->gpr[11];
@@ -205,10 +197,7 @@ static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
 	err |= __clear_user(&frame->uc, offsetof(struct ucontext, uc_mcontext));
 	err |= __put_user(0, &frame->uc.uc_flags);
 	err |= __put_user(NULL, &frame->uc.uc_link);
-	err |= __put_user((void *)current->sas_ss_sp,
-			  &frame->uc.uc_stack.ss_sp);
-	err |= __put_user(sas_ss_flags(regs->sp), &frame->uc.uc_stack.ss_flags);
-	err |= __put_user(current->sas_ss_size, &frame->uc.uc_stack.ss_size);
+	err |= __save_altstack(&frame->uc.uc_stack, regs->sp);
 	err |= setup_sigcontext(&frame->uc.uc_mcontext, regs, set->sig[0]);
 
 	err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));

arch/parisc/Kconfig

@@ -23,6 +23,11 @@ config PARISC
 	select HAVE_MOD_ARCH_SPECIFIC
 	select MODULES_USE_ELF_RELA
 	select CLONE_BACKWARDS
+	select GENERIC_SIGALTSTACK
+	select GENERIC_COMPAT_RT_SIGACTION
+	select GENERIC_COMPAT_RT_SIGQUEUEINFO
+	select GENERIC_COMPAT_RT_SIGPROCMASK
+	select GENERIC_COMPAT_RT_SIGPENDING
 
 	help
 	  The PA-RISC microprocessor is designed by Hewlett-Packard and used

arch/parisc/kernel/entry.S

@@ -1748,44 +1748,6 @@ ENTRY(sys_rt_sigreturn_wrapper)
 	LDREG	PT_GR28(%r1),%r28  /* reload original r28 for syscall_exit */
 ENDPROC(sys_rt_sigreturn_wrapper)
 
-ENTRY(sys_sigaltstack_wrapper)
-	/* Get the user stack pointer */
-	LDREG	TI_TASK-THREAD_SZ_ALGN-FRAME_SIZE(%r30),%r1
-	ldo	TASK_REGS(%r1),%r24	/* get pt regs */
-	LDREG	TASK_PT_GR30(%r24),%r24
-	STREG	%r2, -RP_OFFSET(%r30)
-#ifdef CONFIG_64BIT
-	ldo	FRAME_SIZE(%r30), %r30
-	BL	do_sigaltstack,%r2
-	ldo	-16(%r30),%r29		/* Reference param save area */
-#else
-	BL	do_sigaltstack,%r2
-	ldo	FRAME_SIZE(%r30), %r30
-#endif
-
-	ldo	-FRAME_SIZE(%r30), %r30
-	LDREG	-RP_OFFSET(%r30), %r2
-	bv	%r0(%r2)
-	nop
-ENDPROC(sys_sigaltstack_wrapper)
-
-#ifdef CONFIG_64BIT
-ENTRY(sys32_sigaltstack_wrapper)
-	/* Get the user stack pointer */
-	LDREG	TI_TASK-THREAD_SZ_ALGN-FRAME_SIZE(%r30),%r24
-	LDREG	TASK_PT_GR30(%r24),%r24
-	STREG	%r2, -RP_OFFSET(%r30)
-	ldo	FRAME_SIZE(%r30), %r30
-	BL	do_sigaltstack32,%r2
-	ldo	-16(%r30),%r29		/* Reference param save area */
-
-	ldo	-FRAME_SIZE(%r30), %r30
-	LDREG	-RP_OFFSET(%r30), %r2
-	bv	%r0(%r2)
-	nop
-ENDPROC(sys32_sigaltstack_wrapper)
-#endif
-
 ENTRY(syscall_exit)
 	/* NOTE: HP-UX syscalls also come through here
 	 * after hpux_syscall_exit fixes up return

arch/parisc/kernel/signal.c

@@ -143,7 +143,7 @@ sys_rt_sigreturn(struct pt_regs *regs, int in_syscall)
 			goto give_sigsegv;
 		DBG(1,"sys_rt_sigreturn: usp %#08lx stack 0x%p\n", 
 				usp, &compat_frame->uc.uc_stack);
-		if (do_sigaltstack32(&compat_frame->uc.uc_stack, NULL, usp) == -EFAULT)
+		if (compat_restore_altstack(&compat_frame->uc.uc_stack))
 			goto give_sigsegv;
 	} else
 #endif
@@ -154,7 +154,7 @@ sys_rt_sigreturn(struct pt_regs *regs, int in_syscall)
 			goto give_sigsegv;
 		DBG(1,"sys_rt_sigreturn: usp %#08lx stack 0x%p\n", 
 				usp, &frame->uc.uc_stack);
-		if (do_sigaltstack(&frame->uc.uc_stack, NULL, usp) == -EFAULT)
+		if (restore_altstack(&frame->uc.uc_stack))
 			goto give_sigsegv;
 	}
 		
@@ -260,15 +260,7 @@ setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
 	if (is_compat_task()) {
 		DBG(1,"setup_rt_frame: frame->info = 0x%p\n", &compat_frame->info);
 		err |= copy_siginfo_to_user32(&compat_frame->info, info);
-		DBG(1,"SETUP_RT_FRAME: 1\n");
-		compat_val = (compat_int_t)current->sas_ss_sp;
-		err |= __put_user(compat_val, &compat_frame->uc.uc_stack.ss_sp);
-		DBG(1,"SETUP_RT_FRAME: 2\n");
-		compat_val = (compat_int_t)current->sas_ss_size;
-		err |= __put_user(compat_val, &compat_frame->uc.uc_stack.ss_size);
-		DBG(1,"SETUP_RT_FRAME: 3\n");
-		compat_val = sas_ss_flags(regs->gr[30]);		
-		err |= __put_user(compat_val, &compat_frame->uc.uc_stack.ss_flags);		
+		err |= __compat_save_altstack( &compat_frame->uc.uc_stack, regs->gr[30]);
 		DBG(1,"setup_rt_frame: frame->uc = 0x%p\n", &compat_frame->uc);
 		DBG(1,"setup_rt_frame: frame->uc.uc_mcontext = 0x%p\n", &compat_frame->uc.uc_mcontext);
 		err |= setup_sigcontext32(&compat_frame->uc.uc_mcontext, 
@@ -280,10 +272,7 @@ setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
 	{	
 		DBG(1,"setup_rt_frame: frame->info = 0x%p\n", &frame->info);
 		err |= copy_siginfo_to_user(&frame->info, info);
-		err |= __put_user(current->sas_ss_sp, &frame->uc.uc_stack.ss_sp);
-		err |= __put_user(current->sas_ss_size, &frame->uc.uc_stack.ss_size);
-		err |= __put_user(sas_ss_flags(regs->gr[30]),
-				  &frame->uc.uc_stack.ss_flags);
+		err |= __save_altstack(&frame->uc.uc_stack, regs->gr[30]);
 		DBG(1,"setup_rt_frame: frame->uc = 0x%p\n", &frame->uc);
 		DBG(1,"setup_rt_frame: frame->uc.uc_mcontext = 0x%p\n", &frame->uc.uc_mcontext);
 		err |= setup_sigcontext(&frame->uc.uc_mcontext, regs, in_syscall);

arch/parisc/kernel/signal32.c

@@ -60,129 +60,6 @@ sigset_64to32(compat_sigset_t *s32, sigset_t *s64)
 	s32->sig[1] = (s64->sig[0] >> 32) & 0xffffffffUL;
 }
 
-static int
-put_sigset32(compat_sigset_t __user *up, sigset_t *set, size_t sz)
-{
-	compat_sigset_t s;
-
-	if (sz != sizeof *set)
-		return -EINVAL;
-	sigset_64to32(&s, set);
-
-	return copy_to_user(up, &s, sizeof s);
-}
-
-static int
-get_sigset32(compat_sigset_t __user *up, sigset_t *set, size_t sz)
-{
-	compat_sigset_t s;
-	int r;
-
-	if (sz != sizeof *set)
-		return -EINVAL;
-
-	if ((r = copy_from_user(&s, up, sz)) == 0) {
-		sigset_32to64(set, &s);
-	}
-
-	return r;
-}
-
-int sys32_rt_sigprocmask(int how, compat_sigset_t __user *set, compat_sigset_t __user *oset,
-				    unsigned int sigsetsize)
-{
-	sigset_t old_set, new_set;
-	int ret;
-
-	if (set && get_sigset32(set, &new_set, sigsetsize))
-		return -EFAULT;
-	
-	KERNEL_SYSCALL(ret, sys_rt_sigprocmask, how, set ? (sigset_t __user *)&new_set : NULL,
-				 oset ? (sigset_t __user *)&old_set : NULL, sigsetsize);
-
-	if (!ret && oset && put_sigset32(oset, &old_set, sigsetsize))
-		return -EFAULT;
-
-	return ret;
-}
-
-
-int sys32_rt_sigpending(compat_sigset_t __user *uset, unsigned int sigsetsize)
-{
-	int ret;
-	sigset_t set;
-
-	KERNEL_SYSCALL(ret, sys_rt_sigpending, (sigset_t __user *)&set, sigsetsize);
-
-	if (!ret && put_sigset32(uset, &set, sigsetsize))
-		return -EFAULT;
-
-	return ret;
-}
-
-long
-sys32_rt_sigaction(int sig, const struct sigaction32 __user *act, struct sigaction32 __user *oact,
-                 size_t sigsetsize)
-{
-	struct k_sigaction32 new_sa32, old_sa32;
-	struct k_sigaction new_sa, old_sa;
-	int ret = -EINVAL;
-
-	if (act) {
-		if (copy_from_user(&new_sa32.sa, act, sizeof new_sa32.sa))
-			return -EFAULT;
-		new_sa.sa.sa_handler = (__sighandler_t)(unsigned long)new_sa32.sa.sa_handler;
-		new_sa.sa.sa_flags = new_sa32.sa.sa_flags;
-		sigset_32to64(&new_sa.sa.sa_mask, &new_sa32.sa.sa_mask);
-	}
-
-	ret = do_sigaction(sig, act ? &new_sa : NULL, oact ? &old_sa : NULL);
-
-	if (!ret && oact) {
-		sigset_64to32(&old_sa32.sa.sa_mask, &old_sa.sa.sa_mask);
-		old_sa32.sa.sa_flags = old_sa.sa.sa_flags;
-		old_sa32.sa.sa_handler = (__sighandler_t32)(unsigned long)old_sa.sa.sa_handler;
-		if (copy_to_user(oact, &old_sa32.sa, sizeof old_sa32.sa))
-			return -EFAULT;
-	}
-	return ret;
-}
-
-int 
-do_sigaltstack32 (const compat_stack_t __user *uss32, compat_stack_t __user *uoss32, unsigned long sp)
-{
-	compat_stack_t ss32, oss32;
-	stack_t ss, oss;
-	stack_t *ssp = NULL, *ossp = NULL;
-	int ret;
-
-	if (uss32) {
-		if (copy_from_user(&ss32, uss32, sizeof ss32))
-			return -EFAULT;
-
-		ss.ss_sp = (void __user *)(unsigned long)ss32.ss_sp;
-		ss.ss_flags = ss32.ss_flags;
-		ss.ss_size = ss32.ss_size;
-
-		ssp = &ss;
-	}
-
-	if (uoss32)
-		ossp = &oss;
-
-	KERNEL_SYSCALL(ret, do_sigaltstack, (const stack_t __user *)ssp, (stack_t __user *)ossp, sp);
-
-	if (!ret && uoss32) {
-		oss32.ss_sp = (unsigned int)(unsigned long)oss.ss_sp;
-		oss32.ss_flags = oss.ss_flags;
-		oss32.ss_size = oss.ss_size;
-		if (copy_to_user(uoss32, &oss32, sizeof *uoss32))
-			return -EFAULT;
-	}
-
-	return ret;
-}
-
 long
 restore_sigcontext32(struct compat_sigcontext __user *sc, struct compat_regfile __user * rf,
 		struct pt_regs *regs)
@@ -499,22 +376,3 @@ copy_siginfo_to_user32 (compat_siginfo_t __user *to, siginfo_t *from)
 	}
 	return err;
 }
-
-asmlinkage long compat_sys_rt_sigqueueinfo(int pid, int sig,
-	struct compat_siginfo __user *uinfo)
-{
-	siginfo_t info;
-
-	if (copy_siginfo_from_user32(&info, uinfo))
-		return -EFAULT;
-
-	/* Not even root can pretend to send signals from the kernel.
-	   Nor can they impersonate a kill(), which adds source info.  */
-	if (info.si_code >= 0)
-		return -EPERM;
-	info.si_signo = sig;
-
-	/* POSIX.1b doesn't mention process groups.  */
-	return kill_proc_info(sig, &info, pid);
-}
-

arch/parisc/kernel/signal32.h

@@ -21,23 +21,6 @@
 
 #include <linux/compat.h>
 
-typedef compat_uptr_t compat_sighandler_t;
-
-typedef struct compat_sigaltstack {
-        compat_uptr_t ss_sp;
-        compat_int_t ss_flags;
-        compat_size_t ss_size;
-} compat_stack_t;
-
-/* Most things should be clean enough to redefine this at will, if care
-   is taken to make libc match.  */
-
-struct compat_sigaction {
-        compat_sighandler_t sa_handler;
-        compat_uint_t sa_flags;
-        compat_sigset_t sa_mask;               /* mask last for extensibility */
-};
-
 /* 32-bit ucontext as seen from an 64-bit kernel */
 struct compat_ucontext {
         compat_uint_t uc_flags;
@@ -51,10 +34,6 @@ struct compat_ucontext {
 
 /* ELF32 signal handling */
 
-struct k_sigaction32 {
-	struct compat_sigaction sa;
-};
-
 int copy_siginfo_to_user32 (compat_siginfo_t __user *to, siginfo_t *from);
 int copy_siginfo_from_user32 (siginfo_t *to, compat_siginfo_t __user *from);
 
@@ -102,8 +81,6 @@ struct compat_rt_sigframe {
 
 void sigset_32to64(sigset_t *s64, compat_sigset_t *s32);
 void sigset_64to32(compat_sigset_t *s32, sigset_t *s64);
-int do_sigaltstack32 (const compat_stack_t __user *uss32, 
-		compat_stack_t __user *uoss32, unsigned long sp);
 long restore_sigcontext32(struct compat_sigcontext __user *sc, 
 		struct compat_regfile __user *rf,
 		struct pt_regs *regs);

arch/parisc/kernel/sys32.h

@@ -33,16 +33,4 @@
     set_fs (old_fs); \
 }
 
-#ifdef CONFIG_COMPAT
-
-typedef __u32 __sighandler_t32;
-
-struct sigaction32 {
-	__sighandler_t32 sa_handler;
-	unsigned int sa_flags;
-	compat_sigset_t sa_mask;		/* mask last for extensibility */
-};
-
-#endif
-
 #endif

arch/parisc/kernel/sys_parisc32.c

@@ -61,18 +61,6 @@ asmlinkage long sys32_unimplemented(int r26, int r25, int r24, int r23,
     return -ENOSYS;
 }
 
-asmlinkage long sys32_sched_rr_get_interval(pid_t pid,
-	struct compat_timespec __user *interval)
-{
-	struct timespec t;
-	int ret;
-
-	KERNEL_SYSCALL(ret, sys_sched_rr_get_interval, pid, (struct timespec __user *)&t);
-	if (put_compat_timespec(&t, interval))
-		return -EFAULT;
-	return ret;
-}
-
 struct msgbuf32 {
     int mtype;
     char mtext[1];

arch/parisc/kernel/syscall_table.S

@@ -250,12 +250,12 @@
 	/* These 2 would've worked if someone had defined struct timespec
 	 * carefully, like timeval for example (which is about the same).
 	 * Unfortunately it contains a long :-( */
-	ENTRY_DIFF(sched_rr_get_interval)
+	ENTRY_COMP(sched_rr_get_interval)
 	ENTRY_COMP(nanosleep)
 	ENTRY_SAME(mremap)
 	ENTRY_SAME(setresuid)
 	ENTRY_SAME(getresuid)		/* 165 */
-	ENTRY_DIFF(sigaltstack_wrapper)
+	ENTRY_COMP(sigaltstack)
 	ENTRY_SAME(ni_syscall)		/* query_module */
 	ENTRY_SAME(poll)
 	/* structs contain pointers and an in_addr... */
@@ -265,9 +265,9 @@
 	ENTRY_SAME(prctl)
 	/* signals need a careful review */
 	ENTRY_SAME(rt_sigreturn_wrapper)
-	ENTRY_DIFF(rt_sigaction)
-	ENTRY_DIFF(rt_sigprocmask)	/* 175 */
-	ENTRY_DIFF(rt_sigpending)
+	ENTRY_COMP(rt_sigaction)
+	ENTRY_COMP(rt_sigprocmask)	/* 175 */
+	ENTRY_COMP(rt_sigpending)
 	ENTRY_COMP(rt_sigtimedwait)
 	/* even though the struct siginfo_t is different, it appears like
 	 * all the paths use values which should be same wide and narrow.

arch/powerpc/Kconfig

@@ -144,6 +144,13 @@ config PPC
 	select HAVE_MOD_ARCH_SPECIFIC
 	select MODULES_USE_ELF_RELA
 	select CLONE_BACKWARDS
+	select GENERIC_SIGALTSTACK
+	select GENERIC_COMPAT_RT_SIGACTION
+	select GENERIC_COMPAT_RT_SIGQUEUEINFO
+	select GENERIC_COMPAT_RT_SIGPROCMASK
+	select GENERIC_COMPAT_RT_SIGPENDING
+	select OLD_SIGSUSPEND
+	select OLD_SIGACTION if PPC32
 
 config EARLY_PRINTK
 	bool
@@ -154,6 +161,7 @@ config COMPAT
 	default y if PPC64
 	select COMPAT_BINFMT_ELF
 	select ARCH_WANT_OLD_COMPAT_IPC
+	select COMPAT_OLD_SIGACTION
 
 config SYSVIPC_COMPAT
 	bool

arch/powerpc/include/asm/syscalls.h

@@ -5,9 +5,7 @@
 #include <linux/compiler.h>
 #include <linux/linkage.h>
 #include <linux/types.h>
-#include <asm/signal.h>
 
-struct pt_regs;
 struct rtas_args;
 
 asmlinkage unsigned long sys_mmap(unsigned long addr, size_t len,
@@ -16,15 +14,8 @@ asmlinkage unsigned long sys_mmap(unsigned long addr, size_t len,
 asmlinkage unsigned long sys_mmap2(unsigned long addr, size_t len,
 		unsigned long prot, unsigned long flags,
 		unsigned long fd, unsigned long pgoff);
-asmlinkage long sys_pipe(int __user *fildes);
-asmlinkage long sys_pipe2(int __user *fildes, int flags);
 asmlinkage long ppc64_personality(unsigned long personality);
 asmlinkage int ppc_rtas(struct rtas_args __user *uargs);
-asmlinkage time_t sys64_time(time_t __user * tloc);
-
-asmlinkage long sys_sigaltstack(const stack_t __user *uss,
-		stack_t __user *uoss, unsigned long r5, unsigned long r6,
-		unsigned long r7, unsigned long r8, struct pt_regs *regs);
 
 #endif /* __KERNEL__ */
 #endif /* __ASM_POWERPC_SYSCALLS_H */

arch/powerpc/include/asm/systbl.h

@@ -10,8 +10,8 @@ SYSCALL_SPU(read)
 SYSCALL_SPU(write)
 COMPAT_SYS_SPU(open)
 SYSCALL_SPU(close)
-COMPAT_SYS_SPU(waitpid)
-COMPAT_SYS_SPU(creat)
+SYSCALL_SPU(waitpid)
+SYSCALL_SPU(creat)
 SYSCALL_SPU(link)
 SYSCALL_SPU(unlink)
 COMPAT_SYS(execve)
@@ -36,13 +36,13 @@ SYSCALL(pause)
 COMPAT_SYS(utime)
 SYSCALL(ni_syscall)
 SYSCALL(ni_syscall)
-COMPAT_SYS_SPU(access)
-COMPAT_SYS_SPU(nice)
+SYSCALL_SPU(access)
+SYSCALL_SPU(nice)
 SYSCALL(ni_syscall)
 SYSCALL_SPU(sync)
-COMPAT_SYS_SPU(kill)
+SYSCALL_SPU(kill)
 SYSCALL_SPU(rename)
-COMPAT_SYS_SPU(mkdir)
+SYSCALL_SPU(mkdir)
 SYSCALL_SPU(rmdir)
 SYSCALL_SPU(dup)
 SYSCALL_SPU(pipe)
@@ -60,10 +60,10 @@ SYSCALL(ni_syscall)
 COMPAT_SYS_SPU(ioctl)
 COMPAT_SYS_SPU(fcntl)
 SYSCALL(ni_syscall)
-COMPAT_SYS_SPU(setpgid)
+SYSCALL_SPU(setpgid)
 SYSCALL(ni_syscall)
 SYSX(sys_ni_syscall,sys_olduname, sys_olduname)
-COMPAT_SYS_SPU(umask)
+SYSCALL_SPU(umask)
 SYSCALL_SPU(chroot)
 COMPAT_SYS(ustat)
 SYSCALL_SPU(dup2)
@@ -72,23 +72,24 @@ SYSCALL_SPU(getpgrp)
 SYSCALL_SPU(setsid)
 SYS32ONLY(sigaction)
 SYSCALL_SPU(sgetmask)
-COMPAT_SYS_SPU(ssetmask)
+SYSCALL_SPU(ssetmask)
 SYSCALL_SPU(setreuid)
 SYSCALL_SPU(setregid)
+#define compat_sys_sigsuspend sys_sigsuspend
 SYS32ONLY(sigsuspend)
 COMPAT_SYS(sigpending)
-COMPAT_SYS_SPU(sethostname)
+SYSCALL_SPU(sethostname)
 COMPAT_SYS_SPU(setrlimit)
 COMPAT_SYS(old_getrlimit)
 COMPAT_SYS_SPU(getrusage)
 COMPAT_SYS_SPU(gettimeofday)
 COMPAT_SYS_SPU(settimeofday)
-COMPAT_SYS_SPU(getgroups)
-COMPAT_SYS_SPU(setgroups)
+SYSCALL_SPU(getgroups)
+SYSCALL_SPU(setgroups)
 SYSX(sys_ni_syscall,sys_ni_syscall,ppc_select)
 SYSCALL_SPU(symlink)
 OLDSYS(lstat)
-COMPAT_SYS_SPU(readlink)
+SYSCALL_SPU(readlink)
 SYSCALL(uselib)
 SYSCALL(swapon)
 SYSCALL(reboot)
@@ -99,14 +100,14 @@ COMPAT_SYS_SPU(truncate)
 COMPAT_SYS_SPU(ftruncate)
 SYSCALL_SPU(fchmod)
 SYSCALL_SPU(fchown)
-COMPAT_SYS_SPU(getpriority)
-COMPAT_SYS_SPU(setpriority)
+SYSCALL_SPU(getpriority)
+SYSCALL_SPU(setpriority)
 SYSCALL(ni_syscall)
 COMPAT_SYS(statfs)
 COMPAT_SYS(fstatfs)
 SYSCALL(ni_syscall)
 COMPAT_SYS_SPU(socketcall)
-COMPAT_SYS_SPU(syslog)
+SYSCALL_SPU(syslog)
 COMPAT_SYS_SPU(setitimer)
 COMPAT_SYS_SPU(getitimer)
 COMPAT_SYS_SPU(newstat)
@@ -124,7 +125,7 @@ COMPAT_SYS(ipc)
 SYSCALL_SPU(fsync)
 SYS32ONLY(sigreturn)
 PPC_SYS(clone)
-COMPAT_SYS_SPU(setdomainname)
+SYSCALL_SPU(setdomainname)
 SYSCALL_SPU(newuname)
 SYSCALL(ni_syscall)
 COMPAT_SYS_SPU(adjtimex)
@@ -135,10 +136,10 @@ SYSCALL(init_module)
 SYSCALL(delete_module)
 SYSCALL(ni_syscall)
 SYSCALL(quotactl)
-COMPAT_SYS_SPU(getpgid)
+SYSCALL_SPU(getpgid)
 SYSCALL_SPU(fchdir)
 SYSCALL_SPU(bdflush)
-COMPAT_SYS(sysfs)
+SYSCALL_SPU(sysfs)
 SYSX_SPU(ppc64_personality,ppc64_personality,sys_personality)
 SYSCALL(ni_syscall)
 SYSCALL_SPU(setfsuid)
@@ -150,21 +151,21 @@ SYSCALL_SPU(flock)
 SYSCALL_SPU(msync)
 COMPAT_SYS_SPU(readv)
 COMPAT_SYS_SPU(writev)
-COMPAT_SYS_SPU(getsid)
+SYSCALL_SPU(getsid)
 SYSCALL_SPU(fdatasync)
 COMPAT_SYS(sysctl)
 SYSCALL_SPU(mlock)
 SYSCALL_SPU(munlock)
 SYSCALL_SPU(mlockall)
 SYSCALL_SPU(munlockall)
-COMPAT_SYS_SPU(sched_setparam)
-COMPAT_SYS_SPU(sched_getparam)
-COMPAT_SYS_SPU(sched_setscheduler)
-COMPAT_SYS_SPU(sched_getscheduler)
+SYSCALL_SPU(sched_setparam)
+SYSCALL_SPU(sched_getparam)
+SYSCALL_SPU(sched_setscheduler)
+SYSCALL_SPU(sched_getscheduler)
 SYSCALL_SPU(sched_yield)
-COMPAT_SYS_SPU(sched_get_priority_max)
-COMPAT_SYS_SPU(sched_get_priority_min)
-SYSX_SPU(sys_sched_rr_get_interval,compat_sys_sched_rr_get_interval_wrapper,sys_sched_rr_get_interval)
+SYSCALL_SPU(sched_get_priority_max)
+SYSCALL_SPU(sched_get_priority_min)
+COMPAT_SYS_SPU(sched_rr_get_interval)
 COMPAT_SYS_SPU(nanosleep)
 SYSCALL_SPU(mremap)
 SYSCALL_SPU(setresuid)
@@ -174,7 +175,7 @@ SYSCALL_SPU(poll)
 SYSCALL(ni_syscall)
 SYSCALL_SPU(setresgid)
 SYSCALL_SPU(getresgid)
-COMPAT_SYS_SPU(prctl)
+SYSCALL_SPU(prctl)
 COMPAT_SYS(rt_sigreturn)
 COMPAT_SYS(rt_sigaction)
 COMPAT_SYS(rt_sigprocmask)
@@ -253,7 +254,7 @@ COMPAT_SYS_SPU(clock_gettime)
 COMPAT_SYS_SPU(clock_getres)
 COMPAT_SYS_SPU(clock_nanosleep)
 SYSX(ppc64_swapcontext,ppc32_swapcontext,ppc_swapcontext)
-COMPAT_SYS_SPU(tgkill)
+SYSCALL_SPU(tgkill)
 COMPAT_SYS_SPU(utimes)
 COMPAT_SYS_SPU(statfs64)
 COMPAT_SYS_SPU(fstatfs64)
@@ -276,8 +277,8 @@ COMPAT_SYS(add_key)
 COMPAT_SYS(request_key)
 COMPAT_SYS(keyctl)
 COMPAT_SYS(waitid)
-COMPAT_SYS(ioprio_set)
-COMPAT_SYS(ioprio_get)
+SYSCALL(ioprio_set)
+SYSCALL(ioprio_get)
 SYSCALL(inotify_init)
 SYSCALL(inotify_add_watch)
 SYSCALL(inotify_rm_watch)

arch/powerpc/include/uapi/asm/signal.h

@@ -90,6 +90,7 @@ typedef struct {
 
 #include <asm-generic/signal-defs.h>
 
+#ifndef __KERNEL__
 struct old_sigaction {
 	__sighandler_t sa_handler;
 	old_sigset_t sa_mask;
@@ -97,7 +98,6 @@ struct old_sigaction {
 	__sigrestore_t sa_restorer;
 };
 
-#ifndef __KERNEL__
 struct sigaction {
 	__sighandler_t sa_handler;
 	unsigned long sa_flags;

arch/powerpc/kernel/ppc32.h

@@ -16,30 +16,6 @@
 
 /* These are here to support 32-bit syscalls on a 64-bit kernel. */
 
-#define __old_sigaction32	old_sigaction32
-
-struct __old_sigaction32 {
-	compat_uptr_t		sa_handler;
-	compat_old_sigset_t  	sa_mask;
-	unsigned int    	sa_flags;
-	compat_uptr_t		sa_restorer;     /* not used by Linux/SPARC yet */
-};
-
-
-
-struct sigaction32 {
-       compat_uptr_t  sa_handler;	/* Really a pointer, but need to deal with 32 bits */
-       unsigned int sa_flags;
-       compat_uptr_t sa_restorer;	/* Another 32 bit pointer */
-       compat_sigset_t sa_mask;		/* A 32 bit mask */
-};
-
-typedef struct sigaltstack_32 {
-	unsigned int ss_sp;
-	int ss_flags;
-	compat_size_t ss_size;
-} stack_32_t;
-
 struct pt_regs32 {
 	unsigned int gpr[32];
 	unsigned int nip;
@@ -75,7 +51,7 @@ struct mcontext32 {
 struct ucontext32 { 
 	unsigned int	  	uc_flags;
 	unsigned int 	  	uc_link;
-	stack_32_t	 	uc_stack;
+	compat_stack_t	 	uc_stack;
 	int		 	uc_pad[7];
 	compat_uptr_t		uc_regs;	/* points to uc_mcontext field */
 	compat_sigset_t	 	uc_sigmask;	/* mask last for extensibility */

arch/powerpc/kernel/signal.c

@@ -169,10 +169,3 @@ void do_notify_resume(struct pt_regs *regs, unsigned long thread_info_flags)
 		tracehook_notify_resume(regs);
 	}
 }
-
-long sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss,
-		unsigned long r5, unsigned long r6, unsigned long r7,
-		unsigned long r8, struct pt_regs *regs)
-{
-	return do_sigaltstack(uss, uoss, regs->gpr[1]);
-}

arch/powerpc/kernel/signal_32.c

@@ -56,9 +56,7 @@
 #undef DEBUG_SIG
 
 #ifdef CONFIG_PPC64
-#define sys_sigsuspend	compat_sys_sigsuspend
 #define sys_rt_sigreturn	compat_sys_rt_sigreturn
-#define sys_sigaction	compat_sys_sigaction
 #define sys_swapcontext	compat_sys_swapcontext
 #define sys_sigreturn	compat_sys_sigreturn
 
@@ -67,6 +65,8 @@
 #define mcontext	mcontext32
 #define ucontext	ucontext32
 
+#define __save_altstack __compat_save_altstack
+
 /*
  * Userspace code may pass a ucontext which doesn't include VSX added
  * at the end.  We need to check for this case.
@@ -129,23 +129,6 @@ static inline int get_sigset_t(sigset_t *set,
 	return 0;
 }
 
-static inline int get_old_sigaction(struct k_sigaction *new_ka,
-		struct old_sigaction __user *act)
-{
-	compat_old_sigset_t mask;
-	compat_uptr_t handler, restorer;
-
-	if (get_user(handler, &act->sa_handler) ||
-	    __get_user(restorer, &act->sa_restorer) ||
-	    __get_user(new_ka->sa.sa_flags, &act->sa_flags) ||
-	    __get_user(mask, &act->sa_mask))
-		return -EFAULT;
-	new_ka->sa.sa_handler = compat_ptr(handler);
-	new_ka->sa.sa_restorer = compat_ptr(restorer);
-	siginitset(&new_ka->sa.sa_mask, mask);
-	return 0;
-}
-
 #define to_user_ptr(p)		ptr_to_compat(p)
 #define from_user_ptr(p)	compat_ptr(p)
 
@@ -195,21 +178,6 @@ static inline int get_sigset_t(sigset_t *set, const sigset_t __user *uset)
 	return copy_from_user(set, uset, sizeof(*uset));
 }
 
-static inline int get_old_sigaction(struct k_sigaction *new_ka,
-		struct old_sigaction __user *act)
-{
-	old_sigset_t mask;
-
-	if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
-			__get_user(new_ka->sa.sa_handler, &act->sa_handler) ||
-			__get_user(new_ka->sa.sa_restorer, &act->sa_restorer) ||
-			__get_user(new_ka->sa.sa_flags, &act->sa_flags) ||
-			__get_user(mask, &act->sa_mask))
-		return -EFAULT;
-	siginitset(&new_ka->sa.sa_mask, mask);
-	return 0;
-}
-
 #define to_user_ptr(p)		((unsigned long)(p))
 #define from_user_ptr(p)	((void __user *)(p))
 
@@ -233,50 +201,8 @@ static inline int restore_general_regs(struct pt_regs *regs,
 		return -EFAULT;
 	return 0;
 }
-
-#endif /* CONFIG_PPC64 */
-
-/*
- * Atomically swap in the new signal mask, and wait for a signal.
- */
-long sys_sigsuspend(old_sigset_t mask)
-{
-	sigset_t blocked;
-	siginitset(&blocked, mask);
-	return sigsuspend(&blocked);
-}
-
-long sys_sigaction(int sig, struct old_sigaction __user *act,
-		struct old_sigaction __user *oact)
-{
-	struct k_sigaction new_ka, old_ka;
-	int ret;
-
-#ifdef CONFIG_PPC64
-	if (sig < 0)
-		sig = -sig;
 #endif
 
-	if (act) {
-		if (get_old_sigaction(&new_ka, act))
-			return -EFAULT;
-	}
-
-	ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
-	if (!ret && oact) {
-		if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
-		    __put_user(to_user_ptr(old_ka.sa.sa_handler),
-			    &oact->sa_handler) ||
-		    __put_user(to_user_ptr(old_ka.sa.sa_restorer),
-			    &oact->sa_restorer) ||
-		    __put_user(old_ka.sa.sa_flags, &oact->sa_flags) ||
-		    __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask))
-			return -EFAULT;
-	}
-
-	return ret;
-}
-
 /*
  * When we have signals to deliver, we set up on the
  * user stack, going down from the original stack pointer:
@@ -588,89 +514,6 @@ static long restore_user_regs(struct pt_regs *regs,
 }
 
 #ifdef CONFIG_PPC64
-long compat_sys_rt_sigaction(int sig, const struct sigaction32 __user *act,
-		struct sigaction32 __user *oact, size_t sigsetsize)
-{
-	struct k_sigaction new_ka, old_ka;
-	int ret;
-
-	/* XXX: Don't preclude handling different sized sigset_t's.  */
-	if (sigsetsize != sizeof(compat_sigset_t))
-		return -EINVAL;
-
-	if (act) {
-		compat_uptr_t handler;
-
-		ret = get_user(handler, &act->sa_handler);
-		new_ka.sa.sa_handler = compat_ptr(handler);
-		ret |= get_sigset_t(&new_ka.sa.sa_mask, &act->sa_mask);
-		ret |= __get_user(new_ka.sa.sa_flags, &act->sa_flags);
-		if (ret)
-			return -EFAULT;
-	}
-
-	ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
-	if (!ret && oact) {
-		ret = put_user(to_user_ptr(old_ka.sa.sa_handler), &oact->sa_handler);
-		ret |= put_sigset_t(&oact->sa_mask, &old_ka.sa.sa_mask);
-		ret |= __put_user(old_ka.sa.sa_flags, &oact->sa_flags);
-	}
-	return ret;
-}
-
-/*
- * Note: it is necessary to treat how as an unsigned int, with the
- * corresponding cast to a signed int to insure that the proper
- * conversion (sign extension) between the register representation
- * of a signed int (msr in 32-bit mode) and the register representation
- * of a signed int (msr in 64-bit mode) is performed.
- */
-long compat_sys_rt_sigprocmask(u32 how, compat_sigset_t __user *set,
-		compat_sigset_t __user *oset, size_t sigsetsize)
-{
-	sigset_t s;
-	sigset_t __user *up;
-	int ret;
-	mm_segment_t old_fs = get_fs();
-
-	if (set) {
-		if (get_sigset_t(&s, set))
-			return -EFAULT;
-	}
-
-	set_fs(KERNEL_DS);
-	/* This is valid because of the set_fs() */
-	up = (sigset_t __user *) &s;
-	ret = sys_rt_sigprocmask((int)how, set ? up : NULL, oset ? up : NULL,
-				 sigsetsize);
-	set_fs(old_fs);
-	if (ret)
-		return ret;
-	if (oset) {
-		if (put_sigset_t(oset, &s))
-			return -EFAULT;
-	}
-	return 0;
-}
-
-long compat_sys_rt_sigpending(compat_sigset_t __user *set, compat_size_t sigsetsize)
-{
-	sigset_t s;
-	int ret;
-	mm_segment_t old_fs = get_fs();
-
-	set_fs(KERNEL_DS);
-	/* The __user pointer cast is valid because of the set_fs() */
-	ret = sys_rt_sigpending((sigset_t __user *) &s, sigsetsize);
-	set_fs(old_fs);
-	if (!ret) {
-		if (put_sigset_t(set, &s))
-			return -EFAULT;
-	}
-	return ret;
-}
-
-
 int copy_siginfo_to_user32(struct compat_siginfo __user *d, siginfo_t *s)
 {
 	int err;
@@ -739,79 +582,6 @@ int copy_siginfo_from_user32(siginfo_t *to, struct compat_siginfo __user *from)
 
 	return 0;
 }
-
-/*
- * Note: it is necessary to treat pid and sig as unsigned ints, with the
- * corresponding cast to a signed int to insure that the proper conversion
- * (sign extension) between the register representation of a signed int
- * (msr in 32-bit mode) and the register representation of a signed int
- * (msr in 64-bit mode) is performed.
- */
-long compat_sys_rt_sigqueueinfo(u32 pid, u32 sig, compat_siginfo_t __user *uinfo)
-{
-	siginfo_t info;
-	int ret;
-	mm_segment_t old_fs = get_fs();
-
-	ret = copy_siginfo_from_user32(&info, uinfo);
-	if (unlikely(ret))
-		return ret;
-
-	set_fs (KERNEL_DS);
-	/* The __user pointer cast is valid becasuse of the set_fs() */
-	ret = sys_rt_sigqueueinfo((int)pid, (int)sig, (siginfo_t __user *) &info);
-	set_fs (old_fs);
-	return ret;
-}
-/*
- *  Start Alternate signal stack support
- *
- *  System Calls
- *       sigaltatck               compat_sys_sigaltstack
- */
-
-int compat_sys_sigaltstack(u32 __new, u32 __old, int r5,
-		      int r6, int r7, int r8, struct pt_regs *regs)
-{
-	stack_32_t __user * newstack = compat_ptr(__new);
-	stack_32_t __user * oldstack = compat_ptr(__old);
-	stack_t uss, uoss;
-	int ret;
-	mm_segment_t old_fs;
-	unsigned long sp;
-	compat_uptr_t ss_sp;
-
-	/*
-	 * set sp to the user stack on entry to the system call
-	 * the system call router sets R9 to the saved registers
-	 */
-	sp = regs->gpr[1];
-
-	/* Put new stack info in local 64 bit stack struct */
-	if (newstack) {
-		if (get_user(ss_sp, &newstack->ss_sp) ||
-		    __get_user(uss.ss_flags, &newstack->ss_flags) ||
-		    __get_user(uss.ss_size, &newstack->ss_size))
-			return -EFAULT;
-		uss.ss_sp = compat_ptr(ss_sp);
-	}
-
-	old_fs = get_fs();
-	set_fs(KERNEL_DS);
-	/* The __user pointer casts are valid because of the set_fs() */
-	ret = do_sigaltstack(
-		newstack ? (stack_t __user *) &uss : NULL,
-		oldstack ? (stack_t __user *) &uoss : NULL,
-		sp);
-	set_fs(old_fs);
-	/* Copy the stack information to the user output buffer */
-	if (!ret && oldstack  &&
-		(put_user(ptr_to_compat(uoss.ss_sp), &oldstack->ss_sp) ||
-		 __put_user(uoss.ss_flags, &oldstack->ss_flags) ||
-		 __put_user(uoss.ss_size, &oldstack->ss_size)))
-		return -EFAULT;
-	return ret;
-}
 #endif /* CONFIG_PPC64 */
 
 /*
@@ -838,10 +608,7 @@ int handle_rt_signal32(unsigned long sig, struct k_sigaction *ka,
 	if (copy_siginfo_to_user(&rt_sf->info, info)
 	    || __put_user(0, &rt_sf->uc.uc_flags)
 	    || __put_user(0, &rt_sf->uc.uc_link)
-	    || __put_user(current->sas_ss_sp, &rt_sf->uc.uc_stack.ss_sp)
-	    || __put_user(sas_ss_flags(regs->gpr[1]),
-			  &rt_sf->uc.uc_stack.ss_flags)
-	    || __put_user(current->sas_ss_size, &rt_sf->uc.uc_stack.ss_size)
+	    || __save_altstack(&rt_sf->uc.uc_stack, regs->gpr[1])
 	    || __put_user(to_user_ptr(&rt_sf->uc.uc_mcontext),
 		    &rt_sf->uc.uc_regs)
 	    || put_sigset_t(&rt_sf->uc.uc_sigmask, oldset))
@@ -1038,14 +805,11 @@ long sys_rt_sigreturn(int r3, int r4, int r5, int r6, int r7, int r8,
 	 * change it.  -- paulus
 	 */
 #ifdef CONFIG_PPC64
-	/*
-	 * We use the compat_sys_ version that does the 32/64 bits conversion
-	 * and takes userland pointer directly. What about error checking ?
-	 * nobody does any...
-	 */
-	compat_sys_sigaltstack((u32)(u64)&rt_sf->uc.uc_stack, 0, 0, 0, 0, 0, regs);
+	if (compat_restore_altstack(&rt_sf->uc.uc_stack))
+		goto bad;
 #else
-	do_sigaltstack(&rt_sf->uc.uc_stack, NULL, regs->gpr[1]);
+	if (restore_altstack(&rt_sf->uc.uc_stack))
+		goto bad;
 #endif
 	set_thread_flag(TIF_RESTOREALL);
 	return 0;
@@ -1161,7 +925,7 @@ int sys_debug_setcontext(struct ucontext __user *ctx,
 	 * always done it up until now so it is probably better not to
 	 * change it.  -- paulus
 	 */
-	do_sigaltstack(&ctx->uc_stack, NULL, regs->gpr[1]);
+	restore_altstack(&ctx->uc_stack);
 
 	set_thread_flag(TIF_RESTOREALL);
  out:

arch/powerpc/kernel/signal_64.c

@@ -368,10 +368,8 @@ int sys_rt_sigreturn(unsigned long r3, unsigned long r4, unsigned long r5,
 	if (restore_sigcontext(regs, NULL, 1, &uc->uc_mcontext))
 		goto badframe;
 
-	/* do_sigaltstack expects a __user pointer and won't modify
-	 * what's in there anyway
-	 */
-	do_sigaltstack(&uc->uc_stack, NULL, regs->gpr[1]);
+	if (restore_altstack(&uc->uc_stack))
+		goto badframe;
 
 	set_thread_flag(TIF_RESTOREALL);
 	return 0;
@@ -416,10 +414,7 @@ int handle_rt_signal64(int signr, struct k_sigaction *ka, siginfo_t *info,
 	/* Create the ucontext.  */
 	err |= __put_user(0, &frame->uc.uc_flags);
 	err |= __put_user(0, &frame->uc.uc_link);
-	err |= __put_user(current->sas_ss_sp, &frame->uc.uc_stack.ss_sp);
-	err |= __put_user(sas_ss_flags(regs->gpr[1]),
-			  &frame->uc.uc_stack.ss_flags);
-	err |= __put_user(current->sas_ss_size, &frame->uc.uc_stack.ss_size);
+	err |= __save_altstack(&frame->uc.uc_stack, regs->gpr[1]);
 	err |= setup_sigcontext(&frame->uc.uc_mcontext, regs, signr, NULL,
 				(unsigned long)ka->sa.sa_handler, 1);
 	err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));

arch/powerpc/kernel/sys_ppc32.c

@@ -61,16 +61,6 @@ asmlinkage long ppc32_select(u32 n, compat_ulong_t __user *inp,
 	return compat_sys_select((int)n, inp, outp, exp, compat_ptr(tvp_x));
 }
 
-/* Note: it is necessary to treat option as an unsigned int,
- * with the corresponding cast to a signed int to insure that the 
- * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
- * and the register representation of a signed int (msr in 64-bit mode) is performed.
- */
-asmlinkage long compat_sys_sysfs(u32 option, u32 arg1, u32 arg2)
-{
-	return sys_sysfs((int)option, arg1, arg2);
-}
-
 #ifdef CONFIG_SYSVIPC
 long compat_sys_ipc(u32 call, u32 first, u32 second, u32 third, compat_uptr_t ptr,
 	       u32 fifth)
@@ -156,125 +146,6 @@ asmlinkage long compat_sys_sendfile64_wrapper(u32 out_fd, u32 in_fd,
 			    (off_t __user *)offset, count);
 }
 
-/* Note: it is necessary to treat option as an unsigned int, 
- * with the corresponding cast to a signed int to insure that the 
- * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
- * and the register representation of a signed int (msr in 64-bit mode) is performed.
- */
-asmlinkage long compat_sys_prctl(u32 option, u32 arg2, u32 arg3, u32 arg4, u32 arg5)
-{
-	return sys_prctl((int)option,
-			 (unsigned long) arg2,
-			 (unsigned long) arg3,
-			 (unsigned long) arg4,
-			 (unsigned long) arg5);
-}
-
-/* Note: it is necessary to treat pid as an unsigned int, 
- * with the corresponding cast to a signed int to insure that the 
- * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
- * and the register representation of a signed int (msr in 64-bit mode) is performed.
- */
-asmlinkage long compat_sys_sched_rr_get_interval_wrapper(u32 pid,
-							 struct compat_timespec __user *interval)
-{
-	return compat_sys_sched_rr_get_interval((int)pid, interval);
-}
-
-/* Note: it is necessary to treat mode as an unsigned int,
- * with the corresponding cast to a signed int to insure that the 
- * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
- * and the register representation of a signed int (msr in 64-bit mode) is performed.
- */
-asmlinkage long compat_sys_access(const char __user * filename, u32 mode)
-{
-	return sys_access(filename, (int)mode);
-}
-
-
-/* Note: it is necessary to treat mode as an unsigned int,
- * with the corresponding cast to a signed int to insure that the 
- * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
- * and the register representation of a signed int (msr in 64-bit mode) is performed.
- */
-asmlinkage long compat_sys_creat(const char __user * pathname, u32 mode)
-{
-	return sys_creat(pathname, (int)mode);
-}
-
-
-/* Note: it is necessary to treat pid and options as unsigned ints,
- * with the corresponding cast to a signed int to insure that the 
- * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
- * and the register representation of a signed int (msr in 64-bit mode) is performed.
- */
-asmlinkage long compat_sys_waitpid(u32 pid, unsigned int __user * stat_addr, u32 options)
-{
-	return sys_waitpid((int)pid, stat_addr, (int)options);
-}
-
-
-/* Note: it is necessary to treat gidsetsize as an unsigned int,
- * with the corresponding cast to a signed int to insure that the 
- * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
- * and the register representation of a signed int (msr in 64-bit mode) is performed.
- */
-asmlinkage long compat_sys_getgroups(u32 gidsetsize, gid_t __user *grouplist)
-{
-	return sys_getgroups((int)gidsetsize, grouplist);
-}
-
-
-/* Note: it is necessary to treat pid as an unsigned int,
- * with the corresponding cast to a signed int to insure that the 
- * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
- * and the register representation of a signed int (msr in 64-bit mode) is performed.
- */
-asmlinkage long compat_sys_getpgid(u32 pid)
-{
-	return sys_getpgid((int)pid);
-}
-
-
-
-/* Note: it is necessary to treat pid as an unsigned int,
- * with the corresponding cast to a signed int to insure that the 
- * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
- * and the register representation of a signed int (msr in 64-bit mode) is performed.
- */
-asmlinkage long compat_sys_getsid(u32 pid)
-{
-	return sys_getsid((int)pid);
-}
-
-
-/* Note: it is necessary to treat pid and sig as unsigned ints,
- * with the corresponding cast to a signed int to insure that the 
- * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
- * and the register representation of a signed int (msr in 64-bit mode) is performed.
- */
-asmlinkage long compat_sys_kill(u32 pid, u32 sig)
-{
-	return sys_kill((int)pid, (int)sig);
-}
-
-
-/* Note: it is necessary to treat mode as an unsigned int,
- * with the corresponding cast to a signed int to insure that the 
- * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
- * and the register representation of a signed int (msr in 64-bit mode) is performed.
- */
-asmlinkage long compat_sys_mkdir(const char __user * pathname, u32 mode)
-{
-	return sys_mkdir(pathname, (int)mode);
-}
-
-long compat_sys_nice(u32 increment)
-{
-	/* sign extend increment */
-	return sys_nice((int)increment);
-}
-
 off_t ppc32_lseek(unsigned int fd, u32 offset, unsigned int origin)
 {
 	/* sign extend n */
@@ -293,172 +164,6 @@ long compat_sys_ftruncate(int fd, u32 length)
 	return sys_ftruncate(fd, (int)length);
 }
 
-/* Note: it is necessary to treat bufsiz as an unsigned int,
- * with the corresponding cast to a signed int to insure that the 
- * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
- * and the register representation of a signed int (msr in 64-bit mode) is performed.
- */
-asmlinkage long compat_sys_readlink(const char __user * path, char __user * buf, u32 bufsiz)
-{
-	return sys_readlink(path, buf, (int)bufsiz);
-}
-
-/* Note: it is necessary to treat option as an unsigned int,
- * with the corresponding cast to a signed int to insure that the 
- * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
- * and the register representation of a signed int (msr in 64-bit mode) is performed.
- */
-asmlinkage long compat_sys_sched_get_priority_max(u32 policy)
-{
-	return sys_sched_get_priority_max((int)policy);
-}
-
-
-/* Note: it is necessary to treat policy as an unsigned int,
- * with the corresponding cast to a signed int to insure that the 
- * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
- * and the register representation of a signed int (msr in 64-bit mode) is performed.
- */
-asmlinkage long compat_sys_sched_get_priority_min(u32 policy)
-{
-	return sys_sched_get_priority_min((int)policy);
-}
-
-
-/* Note: it is necessary to treat pid as an unsigned int,
- * with the corresponding cast to a signed int to insure that the 
- * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
- * and the register representation of a signed int (msr in 64-bit mode) is performed.
- */
-asmlinkage long compat_sys_sched_getparam(u32 pid, struct sched_param __user *param)
-{
-	return sys_sched_getparam((int)pid, param);
-}
-
-
-/* Note: it is necessary to treat pid as an unsigned int,
- * with the corresponding cast to a signed int to insure that the 
- * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
- * and the register representation of a signed int (msr in 64-bit mode) is performed.
- */
-asmlinkage long compat_sys_sched_getscheduler(u32 pid)
-{
-	return sys_sched_getscheduler((int)pid);
-}
-
-
-/* Note: it is necessary to treat pid as an unsigned int,
- * with the corresponding cast to a signed int to insure that the 
- * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
- * and the register representation of a signed int (msr in 64-bit mode) is performed.
- */
-asmlinkage long compat_sys_sched_setparam(u32 pid, struct sched_param __user *param)
-{
-	return sys_sched_setparam((int)pid, param);
-}
-
-
-/* Note: it is necessary to treat pid and policy as unsigned ints,
- * with the corresponding cast to a signed int to insure that the 
- * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
- * and the register representation of a signed int (msr in 64-bit mode) is performed.
- */
-asmlinkage long compat_sys_sched_setscheduler(u32 pid, u32 policy, struct sched_param __user *param)
-{
-	return sys_sched_setscheduler((int)pid, (int)policy, param);
-}
-
-
-/* Note: it is necessary to treat len as an unsigned int,
- * with the corresponding cast to a signed int to insure that the 
- * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
- * and the register representation of a signed int (msr in 64-bit mode) is performed.
- */
-asmlinkage long compat_sys_setdomainname(char __user *name, u32 len)
-{
-	return sys_setdomainname(name, (int)len);
-}
-
-
-/* Note: it is necessary to treat gidsetsize as an unsigned int,
- * with the corresponding cast to a signed int to insure that the 
- * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
- * and the register representation of a signed int (msr in 64-bit mode) is performed.
- */
-asmlinkage long compat_sys_setgroups(u32 gidsetsize, gid_t __user *grouplist)
-{
-	return sys_setgroups((int)gidsetsize, grouplist);
-}
-
-
-asmlinkage long compat_sys_sethostname(char __user *name, u32 len)
-{
-	/* sign extend len */
-	return sys_sethostname(name, (int)len);
-}
-
-
-/* Note: it is necessary to treat pid and pgid as unsigned ints,
- * with the corresponding cast to a signed int to insure that the 
- * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
- * and the register representation of a signed int (msr in 64-bit mode) is performed.
- */
-asmlinkage long compat_sys_setpgid(u32 pid, u32 pgid)
-{
-	return sys_setpgid((int)pid, (int)pgid);
-}
-
-long compat_sys_getpriority(u32 which, u32 who)
-{
-	/* sign extend which and who */
-	return sys_getpriority((int)which, (int)who);
-}
-
-long compat_sys_setpriority(u32 which, u32 who, u32 niceval)
-{
-	/* sign extend which, who and niceval */
-	return sys_setpriority((int)which, (int)who, (int)niceval);
-}
-
-long compat_sys_ioprio_get(u32 which, u32 who)
-{
-	/* sign extend which and who */
-	return sys_ioprio_get((int)which, (int)who);
-}
-
-long compat_sys_ioprio_set(u32 which, u32 who, u32 ioprio)
-{
-	/* sign extend which, who and ioprio */
-	return sys_ioprio_set((int)which, (int)who, (int)ioprio);
-}
-
-/* Note: it is necessary to treat newmask as an unsigned int,
- * with the corresponding cast to a signed int to insure that the 
- * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
- * and the register representation of a signed int (msr in 64-bit mode) is performed.
- */
-asmlinkage long compat_sys_ssetmask(u32 newmask)
-{
-	return sys_ssetmask((int) newmask);
-}
-
-asmlinkage long compat_sys_syslog(u32 type, char __user * buf, u32 len)
-{
-	/* sign extend len */
-	return sys_syslog(type, buf, (int)len);
-}
-
-
-/* Note: it is necessary to treat mask as an unsigned int,
- * with the corresponding cast to a signed int to insure that the 
- * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
- * and the register representation of a signed int (msr in 64-bit mode) is performed.
- */
-asmlinkage long compat_sys_umask(u32 mask)
-{
-	return sys_umask((int)mask);
-}
-
 unsigned long compat_sys_mmap2(unsigned long addr, size_t len,
 			  unsigned long prot, unsigned long flags,
 			  unsigned long fd, unsigned long pgoff)
@@ -467,12 +172,6 @@ unsigned long compat_sys_mmap2(unsigned long addr, size_t len,
 	return sys_mmap(addr, len, prot, flags, fd, pgoff << 12);
 }
 
-long compat_sys_tgkill(u32 tgid, u32 pid, int sig)
-{
-	/* sign extend tgid, pid */
-	return sys_tgkill((int)tgid, (int)pid, sig);
-}
-
 /* 
  * long long munging:
  * The 32 bit ABI passes long longs in an odd even register pair.

arch/s390/Kconfig

@@ -140,6 +140,13 @@ config S390
 	select HAVE_MOD_ARCH_SPECIFIC
 	select MODULES_USE_ELF_RELA
 	select CLONE_BACKWARDS2
+	select GENERIC_SIGALTSTACK
+	select GENERIC_COMPAT_RT_SIGACTION
+	select GENERIC_COMPAT_RT_SIGQUEUEINFO
+	select GENERIC_COMPAT_RT_SIGPROCMASK
+	select GENERIC_COMPAT_RT_SIGPENDING
+	select OLD_SIGSUSPEND3
+	select OLD_SIGACTION
 
 config SCHED_OMIT_FRAME_POINTER
 	def_bool y
@@ -249,6 +256,7 @@ config COMPAT
 	depends on 64BIT
 	select COMPAT_BINFMT_ELF if BINFMT_ELF
 	select ARCH_WANT_OLD_COMPAT_IPC
+	select COMPAT_OLD_SIGACTION
 	help
 	  Select this option if you want to enable your system kernel to
 	  handle system-calls from ELF binaries for 31 bit ESA.  This option

arch/s390/include/asm/signal.h

@@ -21,12 +21,5 @@ typedef struct {
         unsigned long sig[_NSIG_WORDS];
 } sigset_t;
 
-struct old_sigaction {
-        __sighandler_t sa_handler;
-        old_sigset_t sa_mask;
-        unsigned long sa_flags;
-        void (*sa_restorer)(void);
-};
-
 #define __ARCH_HAS_SA_RESTORER
 #endif

arch/s390/kernel/compat_linux.c

@@ -352,86 +352,6 @@ asmlinkage long sys32_ftruncate64(unsigned int fd, unsigned long high, unsigned
 		return sys_ftruncate(fd, (high << 32) | low);
 }
 
-asmlinkage long sys32_sched_rr_get_interval(compat_pid_t pid,
-				struct compat_timespec __user *interval)
-{
-	struct timespec t;
-	int ret;
-	mm_segment_t old_fs = get_fs ();
-	
-	set_fs (KERNEL_DS);
-	ret = sys_sched_rr_get_interval(pid,
-					(struct timespec __force __user *) &t);
-	set_fs (old_fs);
-	if (put_compat_timespec(&t, interval))
-		return -EFAULT;
-	return ret;
-}
-
-asmlinkage long sys32_rt_sigprocmask(int how, compat_sigset_t __user *set,
-			compat_sigset_t __user *oset, size_t sigsetsize)
-{
-	sigset_t s;
-	compat_sigset_t s32;
-	int ret;
-	mm_segment_t old_fs = get_fs();
-	
-	if (set) {
-		if (copy_from_user (&s32, set, sizeof(compat_sigset_t)))
-			return -EFAULT;
-		s.sig[0] = s32.sig[0] | (((long)s32.sig[1]) << 32);
-	}
-	set_fs (KERNEL_DS);
-	ret = sys_rt_sigprocmask(how,
-				 set ? (sigset_t __force __user *) &s : NULL,
-				 oset ? (sigset_t __force __user *) &s : NULL,
-				 sigsetsize);
-	set_fs (old_fs);
-	if (ret) return ret;
-	if (oset) {
-		s32.sig[1] = (s.sig[0] >> 32);
-		s32.sig[0] = s.sig[0];
-		if (copy_to_user (oset, &s32, sizeof(compat_sigset_t)))
-			return -EFAULT;
-	}
-	return 0;
-}
-
-asmlinkage long sys32_rt_sigpending(compat_sigset_t __user *set,
-				size_t sigsetsize)
-{
-	sigset_t s;
-	compat_sigset_t s32;
-	int ret;
-	mm_segment_t old_fs = get_fs();
-		
-	set_fs (KERNEL_DS);
-	ret = sys_rt_sigpending((sigset_t __force __user *) &s, sigsetsize);
-	set_fs (old_fs);
-	if (!ret) {
-		s32.sig[1] = (s.sig[0] >> 32);
-		s32.sig[0] = s.sig[0];
-		if (copy_to_user (set, &s32, sizeof(compat_sigset_t)))
-			return -EFAULT;
-	}
-	return ret;
-}
-
-asmlinkage long
-sys32_rt_sigqueueinfo(int pid, int sig, compat_siginfo_t __user *uinfo)
-{
-	siginfo_t info;
-	int ret;
-	mm_segment_t old_fs = get_fs();
-	
-	if (copy_siginfo_from_user32(&info, uinfo))
-		return -EFAULT;
-	set_fs (KERNEL_DS);
-	ret = sys_rt_sigqueueinfo(pid, sig, (siginfo_t __force __user *) &info);
-	set_fs (old_fs);
-	return ret;
-}
-
 asmlinkage long sys32_pread64(unsigned int fd, char __user *ubuf,
 				size_t count, u32 poshi, u32 poslo)
 {

arch/s390/kernel/compat_linux.h

@@ -17,13 +17,6 @@ struct ipc_kludge_32 {
         __s32   msgtyp;
 };
 
-struct old_sigaction32 {
-       __u32			sa_handler;	/* Really a pointer, but need to deal with 32 bits */
-       compat_old_sigset_t	sa_mask;	/* A 32 bit mask */
-       __u32			sa_flags;
-       __u32			sa_restorer;	/* Another 32 bit pointer */
-};
-
 /* asm/sigcontext.h */
 typedef union
 {
@@ -68,24 +61,12 @@ struct sigcontext32
 };
 
 /* asm/signal.h */
-struct sigaction32 {
-	__u32		sa_handler;		/* pointer */
-	__u32		sa_flags;
-        __u32		sa_restorer;		/* pointer */
-	compat_sigset_t	sa_mask;        /* mask last for extensibility */
-};
-
-typedef struct {
-	__u32			ss_sp;		/* pointer */
-	int			ss_flags;
-	compat_size_t		ss_size;
-} stack_t32;
 
 /* asm/ucontext.h */
 struct ucontext32 {
 	__u32			uc_flags;
 	__u32			uc_link;	/* pointer */	
-	stack_t32		uc_stack;
+	compat_stack_t		uc_stack;
 	_sigregs32		uc_mcontext;
 	compat_sigset_t		uc_sigmask;	/* mask last for extensibility */
 };
@@ -93,8 +74,6 @@ struct ucontext32 {
 struct stat64_emu31;
 struct mmap_arg_struct_emu31;
 struct fadvise64_64_args;
-struct old_sigaction32;
-struct old_sigaction32;
 
 long sys32_chown16(const char __user * filename, u16 user, u16 group);
 long sys32_lchown16(const char __user * filename, u16 user, u16 group);
@@ -119,12 +98,6 @@ long sys32_ipc(u32 call, int first, int second, int third, u32 ptr);
 long sys32_truncate64(const char __user * path, unsigned long high,
 		      unsigned long low);
 long sys32_ftruncate64(unsigned int fd, unsigned long high, unsigned long low);
-long sys32_sched_rr_get_interval(compat_pid_t pid,
-				 struct compat_timespec __user *interval);
-long sys32_rt_sigprocmask(int how, compat_sigset_t __user *set,
-			  compat_sigset_t __user *oset, size_t sigsetsize);
-long sys32_rt_sigpending(compat_sigset_t __user *set, size_t sigsetsize);
-long sys32_rt_sigqueueinfo(int pid, int sig, compat_siginfo_t __user *uinfo);
 long sys32_init_module(void __user *umod, unsigned long len,
 		       const char __user *uargs);
 long sys32_delete_module(const char __user *name_user, unsigned int flags);
@@ -149,9 +122,4 @@ long sys32_read(unsigned int fd, char __user * buf, size_t count);
 long sys32_write(unsigned int fd, const char __user * buf, size_t count);
 long sys32_fadvise64(int fd, loff_t offset, size_t len, int advise);
 long sys32_fadvise64_64(struct fadvise64_64_args __user *args);
-long sys32_sigaction(int sig, const struct old_sigaction32 __user *act,
-		     struct old_sigaction32 __user *oact);
-long sys32_rt_sigaction(int sig, const struct sigaction32 __user *act,
-			struct sigaction32 __user *oact, size_t sigsetsize);
-long sys32_sigaltstack(const stack_t32 __user *uss, stack_t32 __user *uoss);
 #endif /* _ASM_S390X_S390_H */

arch/s390/kernel/compat_signal.c

@@ -157,122 +157,6 @@ int copy_siginfo_from_user32(siginfo_t *to, compat_siginfo_t __user *from)
 	return err;
 }
 
-asmlinkage long
-sys32_sigaction(int sig, const struct old_sigaction32 __user *act,
-		 struct old_sigaction32 __user *oact)
-{
-        struct k_sigaction new_ka, old_ka;
-	unsigned long sa_handler, sa_restorer;
-        int ret;
-
-        if (act) {
-		compat_old_sigset_t mask;
-		if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
-		    __get_user(sa_handler, &act->sa_handler) ||
-		    __get_user(sa_restorer, &act->sa_restorer) ||
-		    __get_user(new_ka.sa.sa_flags, &act->sa_flags) ||
-		    __get_user(mask, &act->sa_mask))
-			return -EFAULT;
-		new_ka.sa.sa_handler = (__sighandler_t) sa_handler;
-		new_ka.sa.sa_restorer = (void (*)(void)) sa_restorer;
-		siginitset(&new_ka.sa.sa_mask, mask);
-        }
-
-        ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
-
-	if (!ret && oact) {
-		sa_handler = (unsigned long) old_ka.sa.sa_handler;
-		sa_restorer = (unsigned long) old_ka.sa.sa_restorer;
-		if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
-		    __put_user(sa_handler, &oact->sa_handler) ||
-		    __put_user(sa_restorer, &oact->sa_restorer) ||
-		    __put_user(old_ka.sa.sa_flags, &oact->sa_flags) ||
-		    __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask))
-			return -EFAULT;
-        }
-
-	return ret;
-}
-
-asmlinkage long
-sys32_rt_sigaction(int sig, const struct sigaction32 __user *act,
-	   struct sigaction32 __user *oact,  size_t sigsetsize)
-{
-	struct k_sigaction new_ka, old_ka;
-	unsigned long sa_handler;
-	int ret;
-	compat_sigset_t set32;
-
-	/* XXX: Don't preclude handling different sized sigset_t's.  */
-	if (sigsetsize != sizeof(compat_sigset_t))
-		return -EINVAL;
-
-	if (act) {
-		ret = get_user(sa_handler, &act->sa_handler);
-		ret |= __copy_from_user(&set32, &act->sa_mask,
-					sizeof(compat_sigset_t));
-		new_ka.sa.sa_mask.sig[0] =
-			set32.sig[0] | (((long)set32.sig[1]) << 32);
-		ret |= __get_user(new_ka.sa.sa_flags, &act->sa_flags);
-		
-		if (ret)
-			return -EFAULT;
-		new_ka.sa.sa_handler = (__sighandler_t) sa_handler;
-	}
-
-	ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
-
-	if (!ret && oact) {
-		set32.sig[1] = (old_ka.sa.sa_mask.sig[0] >> 32);
-		set32.sig[0] = old_ka.sa.sa_mask.sig[0];
-		ret = put_user((unsigned long)old_ka.sa.sa_handler, &oact->sa_handler);
-		ret |= __copy_to_user(&oact->sa_mask, &set32,
-				      sizeof(compat_sigset_t));
-		ret |= __put_user(old_ka.sa.sa_flags, &oact->sa_flags);
-	}
-
-	return ret;
-}
-
-asmlinkage long
-sys32_sigaltstack(const stack_t32 __user *uss, stack_t32 __user *uoss)
-{
-	struct pt_regs *regs = task_pt_regs(current);
-	stack_t kss, koss;
-	unsigned long ss_sp;
-	int ret, err = 0;
-	mm_segment_t old_fs = get_fs();
-
-	if (uss) {
-		if (!access_ok(VERIFY_READ, uss, sizeof(*uss)))
-			return -EFAULT;
-		err |= __get_user(ss_sp, &uss->ss_sp);
-		err |= __get_user(kss.ss_size, &uss->ss_size);
-		err |= __get_user(kss.ss_flags, &uss->ss_flags);
-		if (err)
-			return -EFAULT;
-		kss.ss_sp = (void __user *) ss_sp;
-	}
-
-	set_fs (KERNEL_DS);
-	ret = do_sigaltstack((stack_t __force __user *) (uss ? &kss : NULL),
-			     (stack_t __force __user *) (uoss ? &koss : NULL),
-			     regs->gprs[15]);
-	set_fs (old_fs);
-
-	if (!ret && uoss) {
-		if (!access_ok(VERIFY_WRITE, uoss, sizeof(*uoss)))
-			return -EFAULT;
-		ss_sp = (unsigned long) koss.ss_sp;
-		err |= __put_user(ss_sp, &uoss->ss_sp);
-		err |= __put_user(koss.ss_size, &uoss->ss_size);
-		err |= __put_user(koss.ss_flags, &uoss->ss_flags);
-		if (err)
-			return -EFAULT;
-	}
-	return ret;
-}
-
 static int save_sigregs32(struct pt_regs *regs, _sigregs32 __user *sregs)
 {
 	_s390_regs_common32 regs32;
@@ -380,10 +264,6 @@ asmlinkage long sys32_rt_sigreturn(void)
 	struct pt_regs *regs = task_pt_regs(current);
 	rt_sigframe32 __user *frame = (rt_sigframe32 __user *)regs->gprs[15];
 	sigset_t set;
-	stack_t st;
-	__u32 ss_sp;
-	int err;
-	mm_segment_t old_fs = get_fs();
 
 	if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
 		goto badframe;
@@ -394,15 +274,8 @@ asmlinkage long sys32_rt_sigreturn(void)
 		goto badframe;
 	if (restore_sigregs_gprs_high(regs, frame->gprs_high))
 		goto badframe;
-	err = __get_user(ss_sp, &frame->uc.uc_stack.ss_sp);
-	st.ss_sp = compat_ptr(ss_sp);
-	err |= __get_user(st.ss_size, &frame->uc.uc_stack.ss_size);
-	err |= __get_user(st.ss_flags, &frame->uc.uc_stack.ss_flags);
-	if (err)
+	if (compat_restore_altstack(&frame->uc.uc_stack))
 		goto badframe; 
-	set_fs (KERNEL_DS);
-	do_sigaltstack((stack_t __force __user *)&st, NULL, regs->gprs[15]);
-	set_fs (old_fs);
 	return regs->gprs[2];
 badframe:
 	force_sig(SIGSEGV, current);
@@ -530,10 +403,7 @@ static int setup_rt_frame32(int sig, struct k_sigaction *ka, siginfo_t *info,
 	/* Create the ucontext.  */
 	err |= __put_user(UC_EXTENDED, &frame->uc.uc_flags);
 	err |= __put_user(0, &frame->uc.uc_link);
-	err |= __put_user(current->sas_ss_sp, &frame->uc.uc_stack.ss_sp);
-	err |= __put_user(sas_ss_flags(regs->gprs[15]),
-	                  &frame->uc.uc_stack.ss_flags);
-	err |= __put_user(current->sas_ss_size, &frame->uc.uc_stack.ss_size);
+	err |= __compat_save_altstack(&frame->uc.uc_stack, regs->gprs[15]);
 	err |= save_sigregs32(regs, &frame->uc.uc_mcontext);
 	err |= save_sigregs_gprs_high(regs, frame->gprs_high);
 	err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));

arch/s390/kernel/compat_wrapper.S

@@ -24,12 +24,6 @@ ENTRY(sys32_write_wrapper)
 	llgfr	%r4,%r4			# size_t
 	jg	sys32_write		# branch to system call
 
-ENTRY(sys32_open_wrapper)
-	llgtr	%r2,%r2			# const char *
-	lgfr	%r3,%r3			# int
-	lgfr	%r4,%r4			# int
-	jg	compat_sys_open		# branch to system call
-
 ENTRY(sys32_close_wrapper)
 	llgfr	%r2,%r2			# unsigned int
 	jg	sys_close		# branch to system call
@@ -226,12 +220,6 @@ ENTRY(sys32_dup2_wrapper)
 
 #sys32_setsid_wrapper			# void
 
-ENTRY(sys32_sigaction_wrapper)
-	lgfr	%r2,%r2			# int
-	llgtr	%r3,%r3			# const struct old_sigaction *
-	llgtr	%r4,%r4			# struct old_sigaction32 *
-	jg	sys32_sigaction		# branch to system call
-
 ENTRY(sys32_setreuid16_wrapper)
 	llgfr	%r2,%r2			# __kernel_old_uid_emu31_t
 	llgfr	%r3,%r3			# __kernel_old_uid_emu31_t
@@ -396,17 +384,6 @@ ENTRY(sys32_syslog_wrapper)
 	lgfr	%r4,%r4			# int
 	jg	sys_syslog		# branch to system call
 
-ENTRY(compat_sys_setitimer_wrapper)
-	lgfr	%r2,%r2			# int
-	llgtr	%r3,%r3			# struct itimerval_emu31 *
-	llgtr	%r4,%r4			# struct itimerval_emu31 *
-	jg	compat_sys_setitimer	# branch to system call
-
-ENTRY(compat_sys_getitimer_wrapper)
-	lgfr	%r2,%r2			# int
-	llgtr	%r3,%r3			# struct itimerval_emu31 *
-	jg	compat_sys_getitimer	# branch to system call
-
 ENTRY(compat_sys_newstat_wrapper)
 	llgtr	%r2,%r2			# char *
 	llgtr	%r3,%r3			# struct stat_emu31 *
@@ -424,13 +401,6 @@ ENTRY(compat_sys_newfstat_wrapper)
 
 #sys32_vhangup_wrapper			# void
 
-ENTRY(compat_sys_wait4_wrapper)
-	lgfr	%r2,%r2			# pid_t
-	llgtr	%r3,%r3			# unsigned int *
-	lgfr	%r4,%r4			# int
-	llgtr	%r5,%r5			# struct rusage *
-	jg	compat_sys_wait4	# branch to system call
-
 ENTRY(sys32_swapoff_wrapper)
 	llgtr	%r2,%r2			# const char *
 	jg	sys_swapoff		# branch to system call
@@ -474,12 +444,6 @@ ENTRY(sys32_mprotect_wrapper)
 	llgfr	%r4,%r4			# unsigned long
 	jg	sys_mprotect		# branch to system call
 
-ENTRY(compat_sys_sigprocmask_wrapper)
-	lgfr	%r2,%r2			# int
-	llgtr	%r3,%r3			# compat_old_sigset_t *
-	llgtr	%r4,%r4			# compat_old_sigset_t *
-	jg	compat_sys_sigprocmask		# branch to system call
-
 ENTRY(sys_init_module_wrapper)
 	llgtr	%r2,%r2			# void *
 	llgfr	%r3,%r3			# unsigned long
@@ -628,11 +592,6 @@ ENTRY(sys32_sched_get_priority_min_wrapper)
 	lgfr	%r2,%r2			# int
 	jg	sys_sched_get_priority_min	# branch to system call
 
-ENTRY(sys32_sched_rr_get_interval_wrapper)
-	lgfr	%r2,%r2			# pid_t
-	llgtr	%r3,%r3			# struct compat_timespec *
-	jg	sys32_sched_rr_get_interval	# branch to system call
-
 ENTRY(compat_sys_nanosleep_wrapper)
 	llgtr	%r2,%r2			# struct compat_timespec *
 	llgtr	%r3,%r3			# struct compat_timespec *
@@ -686,43 +645,6 @@ ENTRY(sys32_prctl_wrapper)
 
 #sys32_rt_sigreturn_wrapper		# done in rt_sigreturn_glue
 
-ENTRY(sys32_rt_sigaction_wrapper)
-	lgfr	%r2,%r2			# int
-	llgtr	%r3,%r3			# const struct sigaction_emu31 *
-	llgtr	%r4,%r4			# const struct sigaction_emu31 *
-	llgfr	%r5,%r5			# size_t
-	jg	sys32_rt_sigaction	# branch to system call
-
-ENTRY(sys32_rt_sigprocmask_wrapper)
-	lgfr	%r2,%r2			# int
-	llgtr	%r3,%r3			# old_sigset_emu31 *
-	llgtr	%r4,%r4			# old_sigset_emu31 *
-	llgfr	%r5,%r5			# size_t
-	jg	sys32_rt_sigprocmask	# branch to system call
-
-ENTRY(sys32_rt_sigpending_wrapper)
-	llgtr	%r2,%r2			# sigset_emu31 *
-	llgfr	%r3,%r3			# size_t
-	jg	sys32_rt_sigpending	# branch to system call
-
-ENTRY(compat_sys_rt_sigtimedwait_wrapper)
-	llgtr	%r2,%r2			# const sigset_emu31_t *
-	llgtr	%r3,%r3			# siginfo_emu31_t *
-	llgtr	%r4,%r4			# const struct compat_timespec *
-	llgfr	%r5,%r5			# size_t
-	jg	compat_sys_rt_sigtimedwait	# branch to system call
-
-ENTRY(sys32_rt_sigqueueinfo_wrapper)
-	lgfr	%r2,%r2			# int
-	lgfr	%r3,%r3			# int
-	llgtr	%r4,%r4			# siginfo_emu31_t *
-	jg	sys32_rt_sigqueueinfo	# branch to system call
-
-ENTRY(compat_sys_rt_sigsuspend_wrapper)
-	llgtr	%r2,%r2			# compat_sigset_t *
-	llgfr	%r3,%r3			# compat_size_t
-	jg	compat_sys_rt_sigsuspend
-
 ENTRY(sys32_pread64_wrapper)
 	llgfr	%r2,%r2			# unsigned int
 	llgtr	%r3,%r3			# char *
@@ -760,11 +682,6 @@ ENTRY(sys32_capset_wrapper)
 	llgtr	%r3,%r3			# const cap_user_data_t
 	jg	sys_capset		# branch to system call
 
-ENTRY(sys32_sigaltstack_wrapper)
-	llgtr	%r2,%r2			# const stack_emu31_t *
-	llgtr	%r3,%r3			# stack_emu31_t *
-	jg	sys32_sigaltstack
-
 ENTRY(sys32_sendfile_wrapper)
 	lgfr	%r2,%r2			# int
 	lgfr	%r3,%r3			# int
@@ -921,16 +838,6 @@ ENTRY(sys32_fstat64_wrapper)
 	llgtr	%r3,%r3			# struct stat64 *
 	jg	sys32_fstat64		# branch to system call
 
-ENTRY(compat_sys_futex_wrapper)
-	llgtr	%r2,%r2			# u32 *
-	lgfr	%r3,%r3			# int
-	lgfr	%r4,%r4			# int
-	llgtr	%r5,%r5			# struct compat_timespec *
-	llgtr	%r6,%r6			# u32 *
-	lgf	%r0,164(%r15)		# int
-	stg	%r0,160(%r15)
-	jg	compat_sys_futex	# branch to system call
-
 ENTRY(sys32_setxattr_wrapper)
 	llgtr	%r2,%r2			# char *
 	llgtr	%r3,%r3			# char *
@@ -1216,14 +1123,6 @@ ENTRY(sys32_remap_file_pages_wrapper)
 	llgfr	%r6,%r6			# unsigned long
 	jg	sys_remap_file_pages
 
-ENTRY(compat_sys_waitid_wrapper)
-	lgfr	%r2,%r2			# int
-	lgfr	%r3,%r3			# pid_t
-	llgtr	%r4,%r4			# siginfo_emu31_t *
-	lgfr	%r5,%r5			# int
-	llgtr	%r6,%r6			# struct rusage_emu31 *
-	jg	compat_sys_waitid
-
 ENTRY(compat_sys_kexec_load_wrapper)
 	llgfr	%r2,%r2			# unsigned long
 	llgfr	%r3,%r3			# unsigned long
@@ -1253,13 +1152,6 @@ ENTRY(sys_inotify_rm_watch_wrapper)
 	llgfr	%r3,%r3			# u32
 	jg	sys_inotify_rm_watch
 
-ENTRY(compat_sys_openat_wrapper)
-	llgfr	%r2,%r2			# unsigned int
-	llgtr	%r3,%r3			# const char *
-	lgfr	%r4,%r4			# int
-	lgfr	%r5,%r5			# int
-	jg	compat_sys_openat
-
 ENTRY(sys_mkdirat_wrapper)
 	lgfr	%r2,%r2			# int
 	llgtr	%r3,%r3			# const char *
@@ -1362,17 +1254,6 @@ ENTRY(sys_unshare_wrapper)
 	llgfr	%r2,%r2			# unsigned long
 	jg	sys_unshare
 
-ENTRY(compat_sys_set_robust_list_wrapper)
-	llgtr	%r2,%r2			# struct compat_robust_list_head *
-	llgfr	%r3,%r3			# size_t
-	jg	compat_sys_set_robust_list
-
-ENTRY(compat_sys_get_robust_list_wrapper)
-	lgfr	%r2,%r2			# int
-	llgtr	%r3,%r3			# compat_uptr_t_t *
-	llgtr	%r4,%r4			# compat_size_t *
-	jg	compat_sys_get_robust_list
-
 ENTRY(sys_splice_wrapper)
 	lgfr	%r2,%r2			# int
 	llgtr	%r3,%r3			# loff_t *
@@ -1458,18 +1339,6 @@ ENTRY(sys_timerfd_create_wrapper)
 	lgfr	%r3,%r3			# int
 	jg	sys_timerfd_create
 
-ENTRY(compat_sys_timerfd_settime_wrapper)
-	lgfr	%r2,%r2			# int
-	lgfr	%r3,%r3			# int
-	llgtr	%r4,%r4			# struct compat_itimerspec *
-	llgtr	%r5,%r5			# struct compat_itimerspec *
-	jg	compat_sys_timerfd_settime
-
-ENTRY(compat_sys_timerfd_gettime_wrapper)
-	lgfr	%r2,%r2			# int
-	llgtr	%r3,%r3			# struct compat_itimerspec *
-	jg	compat_sys_timerfd_gettime
-
 ENTRY(compat_sys_signalfd4_wrapper)
 	lgfr	%r2,%r2			# int
 	llgtr	%r3,%r3			# compat_sigset_t *
@@ -1550,13 +1419,6 @@ ENTRY(compat_sys_pwritev_wrapper)
 	llgfr	%r6,%r6			# u32
 	jg	compat_sys_pwritev	# branch to system call
 
-ENTRY(compat_sys_rt_tgsigqueueinfo_wrapper)
-	lgfr	%r2,%r2			# compat_pid_t
-	lgfr	%r3,%r3			# compat_pid_t
-	lgfr	%r4,%r4			# int
-	llgtr	%r5,%r5			# struct compat_siginfo *
-	jg	compat_sys_rt_tgsigqueueinfo_wrapper # branch to system call
-
 ENTRY(sys_perf_event_open_wrapper)
 	llgtr	%r2,%r2			# const struct perf_event_attr *
 	lgfr	%r3,%r3			# pid_t
@@ -1607,12 +1469,6 @@ ENTRY(sys_name_to_handle_at_wrapper)
 	lgfr	%r6,%r6			# int
 	jg	sys_name_to_handle_at
 
-ENTRY(compat_sys_open_by_handle_at_wrapper)
-	lgfr	%r2,%r2			# int
-	llgtr	%r3,%r3			# struct file_handle __user *
-	lgfr	%r4,%r4			# int
-	jg	compat_sys_open_by_handle_at
-
 ENTRY(compat_sys_clock_adjtime_wrapper)
 	lgfr	%r2,%r2			# clockid_t (int)
 	llgtr	%r3,%r3			# struct compat_timex __user *

arch/s390/kernel/entry.h

@@ -73,10 +73,6 @@ long sys_s390_fadvise64(int fd, u32 offset_high, u32 offset_low,
 long sys_s390_fadvise64_64(struct fadvise64_64_args __user *args);
 long sys_s390_fallocate(int fd, int mode, loff_t offset, u32 len_high,
 			u32 len_low);
-long sys_sigsuspend(int history0, int history1, old_sigset_t mask);
-long sys_sigaction(int sig, const struct old_sigaction __user *act,
-		   struct old_sigaction __user *oact);
-long sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss);
 long sys_sigreturn(void);
 long sys_rt_sigreturn(void);
 long sys32_sigreturn(void);

arch/s390/kernel/signal.c

@@ -48,54 +48,6 @@ typedef struct
 	struct ucontext uc;
 } rt_sigframe;
 
-/*
- * Atomically swap in the new signal mask, and wait for a signal.
- */
-SYSCALL_DEFINE3(sigsuspend, int, history0, int, history1, old_sigset_t, mask)
-{
-	sigset_t blocked;
-	siginitset(&blocked, mask);
-	return sigsuspend(&blocked);
-}
-
-SYSCALL_DEFINE3(sigaction, int, sig, const struct old_sigaction __user *, act,
-		struct old_sigaction __user *, oact)
-{
-	struct k_sigaction new_ka, old_ka;
-	int ret;
-
-	if (act) {
-		old_sigset_t mask;
-		if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
-		    __get_user(new_ka.sa.sa_handler, &act->sa_handler) ||
-		    __get_user(new_ka.sa.sa_restorer, &act->sa_restorer) ||
-		    __get_user(new_ka.sa.sa_flags, &act->sa_flags) ||
-		    __get_user(mask, &act->sa_mask))
-			return -EFAULT;
-		siginitset(&new_ka.sa.sa_mask, mask);
-	}
-
-	ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
-
-	if (!ret && oact) {
-		if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
-		    __put_user(old_ka.sa.sa_handler, &oact->sa_handler) ||
-		    __put_user(old_ka.sa.sa_restorer, &oact->sa_restorer) ||
-		    __put_user(old_ka.sa.sa_flags, &oact->sa_flags) ||
-		    __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask))
-			return -EFAULT;
-	}
-
-	return ret;
-}
-
-SYSCALL_DEFINE2(sigaltstack, const stack_t __user *, uss,
-		stack_t __user *, uoss)
-{
-	struct pt_regs *regs = task_pt_regs(current);
-	return do_sigaltstack(uss, uoss, regs->gprs[15]);
-}
-
 /* Returns non-zero on fault. */
 static int save_sigregs(struct pt_regs *regs, _sigregs __user *sregs)
 {
@@ -190,8 +142,7 @@ SYSCALL_DEFINE0(rt_sigreturn)
 	set_current_blocked(&set);
 	if (restore_sigregs(regs, &frame->uc.uc_mcontext))
 		goto badframe;
-	if (do_sigaltstack(&frame->uc.uc_stack, NULL,
-			   regs->gprs[15]) == -EFAULT)
+	if (restore_altstack(&frame->uc.uc_stack))
 		goto badframe;
 	return regs->gprs[2];
 badframe:
@@ -325,10 +276,7 @@ static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
 	/* Create the ucontext.  */
 	err |= __put_user(0, &frame->uc.uc_flags);
 	err |= __put_user(NULL, &frame->uc.uc_link);
-	err |= __put_user((void __user *)current->sas_ss_sp, &frame->uc.uc_stack.ss_sp);
-	err |= __put_user(sas_ss_flags(regs->gprs[15]),
-			  &frame->uc.uc_stack.ss_flags);
-	err |= __put_user(current->sas_ss_size, &frame->uc.uc_stack.ss_size);
+	err |= __save_altstack(&frame->uc.uc_stack, regs->gprs[15]);
 	err |= save_sigregs(regs, &frame->uc.uc_mcontext);
 	err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));
 	if (err)

arch/s390/kernel/syscalls.S

@@ -13,7 +13,7 @@ SYSCALL(sys_exit,sys_exit,sys32_exit_wrapper)
 SYSCALL(sys_fork,sys_fork,sys_fork)
 SYSCALL(sys_read,sys_read,sys32_read_wrapper)
 SYSCALL(sys_write,sys_write,sys32_write_wrapper)
-SYSCALL(sys_open,sys_open,sys32_open_wrapper)			/* 5 */
+SYSCALL(sys_open,sys_open,compat_sys_open)			/* 5 */
 SYSCALL(sys_close,sys_close,sys32_close_wrapper)
 SYSCALL(sys_restart_syscall,sys_restart_syscall,sys_restart_syscall)
 SYSCALL(sys_creat,sys_creat,sys32_creat_wrapper)
@@ -75,7 +75,7 @@ SYSCALL(sys_dup2,sys_dup2,sys32_dup2_wrapper)
 SYSCALL(sys_getppid,sys_getppid,sys_getppid)
 SYSCALL(sys_getpgrp,sys_getpgrp,sys_getpgrp)			/* 65 */
 SYSCALL(sys_setsid,sys_setsid,sys_setsid)
-SYSCALL(sys_sigaction,sys_sigaction,sys32_sigaction_wrapper)
+SYSCALL(sys_sigaction,sys_sigaction,compat_sys_sigaction)
 NI_SYSCALL							/* old sgetmask syscall*/
 NI_SYSCALL							/* old ssetmask syscall*/
 SYSCALL(sys_setreuid16,sys_ni_syscall,sys32_setreuid16_wrapper)	/* old setreuid16 syscall */
@@ -112,8 +112,8 @@ SYSCALL(sys_fstatfs,sys_fstatfs,compat_sys_fstatfs_wrapper)	/* 100 */
 NI_SYSCALL							/* ioperm for i386 */
 SYSCALL(sys_socketcall,sys_socketcall,compat_sys_socketcall_wrapper)
 SYSCALL(sys_syslog,sys_syslog,sys32_syslog_wrapper)
-SYSCALL(sys_setitimer,sys_setitimer,compat_sys_setitimer_wrapper)
-SYSCALL(sys_getitimer,sys_getitimer,compat_sys_getitimer_wrapper)	/* 105 */
+SYSCALL(sys_setitimer,sys_setitimer,compat_sys_setitimer)
+SYSCALL(sys_getitimer,sys_getitimer,compat_sys_getitimer)	/* 105 */
 SYSCALL(sys_newstat,sys_newstat,compat_sys_newstat_wrapper)
 SYSCALL(sys_newlstat,sys_newlstat,compat_sys_newlstat_wrapper)
 SYSCALL(sys_newfstat,sys_newfstat,compat_sys_newfstat_wrapper)
@@ -122,7 +122,7 @@ SYSCALL(sys_lookup_dcookie,sys_lookup_dcookie,sys32_lookup_dcookie_wrapper)	/* 1
 SYSCALL(sys_vhangup,sys_vhangup,sys_vhangup)
 NI_SYSCALL							/* old "idle" system call */
 NI_SYSCALL							/* vm86old for i386 */
-SYSCALL(sys_wait4,sys_wait4,compat_sys_wait4_wrapper)
+SYSCALL(sys_wait4,sys_wait4,compat_sys_wait4)
 SYSCALL(sys_swapoff,sys_swapoff,sys32_swapoff_wrapper)		/* 115 */
 SYSCALL(sys_sysinfo,sys_sysinfo,compat_sys_sysinfo_wrapper)
 SYSCALL(sys_s390_ipc,sys_s390_ipc,sys32_ipc_wrapper)
@@ -134,7 +134,7 @@ SYSCALL(sys_newuname,sys_newuname,sys32_newuname_wrapper)
 NI_SYSCALL							/* modify_ldt for i386 */
 SYSCALL(sys_adjtimex,sys_adjtimex,compat_sys_adjtimex_wrapper)
 SYSCALL(sys_mprotect,sys_mprotect,sys32_mprotect_wrapper)	/* 125 */
-SYSCALL(sys_sigprocmask,sys_sigprocmask,compat_sys_sigprocmask_wrapper)
+SYSCALL(sys_sigprocmask,sys_sigprocmask,compat_sys_sigprocmask)
 NI_SYSCALL							/* old "create module" */
 SYSCALL(sys_init_module,sys_init_module,sys_init_module_wrapper)
 SYSCALL(sys_delete_module,sys_delete_module,sys_delete_module_wrapper)
@@ -169,7 +169,7 @@ SYSCALL(sys_sched_getscheduler,sys_sched_getscheduler,sys32_sched_getscheduler_w
 SYSCALL(sys_sched_yield,sys_sched_yield,sys_sched_yield)
 SYSCALL(sys_sched_get_priority_max,sys_sched_get_priority_max,sys32_sched_get_priority_max_wrapper)
 SYSCALL(sys_sched_get_priority_min,sys_sched_get_priority_min,sys32_sched_get_priority_min_wrapper)	/* 160 */
-SYSCALL(sys_sched_rr_get_interval,sys_sched_rr_get_interval,sys32_sched_rr_get_interval_wrapper)
+SYSCALL(sys_sched_rr_get_interval,sys_sched_rr_get_interval,compat_sys_sched_rr_get_interval)
 SYSCALL(sys_nanosleep,sys_nanosleep,compat_sys_nanosleep_wrapper)
 SYSCALL(sys_mremap,sys_mremap,sys32_mremap_wrapper)
 SYSCALL(sys_setresuid16,sys_ni_syscall,sys32_setresuid16_wrapper)	/* old setresuid16 syscall */
@@ -182,19 +182,19 @@ SYSCALL(sys_setresgid16,sys_ni_syscall,sys32_setresgid16_wrapper)	/* 170 old set
 SYSCALL(sys_getresgid16,sys_ni_syscall,sys32_getresgid16_wrapper)	/* old getresgid16 syscall */
 SYSCALL(sys_prctl,sys_prctl,sys32_prctl_wrapper)
 SYSCALL(sys_rt_sigreturn,sys_rt_sigreturn,sys32_rt_sigreturn)
-SYSCALL(sys_rt_sigaction,sys_rt_sigaction,sys32_rt_sigaction_wrapper)
-SYSCALL(sys_rt_sigprocmask,sys_rt_sigprocmask,sys32_rt_sigprocmask_wrapper)	/* 175 */
-SYSCALL(sys_rt_sigpending,sys_rt_sigpending,sys32_rt_sigpending_wrapper)
-SYSCALL(sys_rt_sigtimedwait,sys_rt_sigtimedwait,compat_sys_rt_sigtimedwait_wrapper)
-SYSCALL(sys_rt_sigqueueinfo,sys_rt_sigqueueinfo,sys32_rt_sigqueueinfo_wrapper)
-SYSCALL(sys_rt_sigsuspend,sys_rt_sigsuspend,compat_sys_rt_sigsuspend_wrapper)
+SYSCALL(sys_rt_sigaction,sys_rt_sigaction,compat_sys_rt_sigaction)
+SYSCALL(sys_rt_sigprocmask,sys_rt_sigprocmask,compat_sys_rt_sigprocmask) /* 175 */
+SYSCALL(sys_rt_sigpending,sys_rt_sigpending,compat_sys_rt_sigpending)
+SYSCALL(sys_rt_sigtimedwait,sys_rt_sigtimedwait,compat_sys_rt_sigtimedwait)
+SYSCALL(sys_rt_sigqueueinfo,sys_rt_sigqueueinfo,compat_sys_rt_sigqueueinfo)
+SYSCALL(sys_rt_sigsuspend,sys_rt_sigsuspend,compat_sys_rt_sigsuspend)
 SYSCALL(sys_pread64,sys_pread64,sys32_pread64_wrapper)		/* 180 */
 SYSCALL(sys_pwrite64,sys_pwrite64,sys32_pwrite64_wrapper)
 SYSCALL(sys_chown16,sys_ni_syscall,sys32_chown16_wrapper)	/* old chown16 syscall */
 SYSCALL(sys_getcwd,sys_getcwd,sys32_getcwd_wrapper)
 SYSCALL(sys_capget,sys_capget,sys32_capget_wrapper)
 SYSCALL(sys_capset,sys_capset,sys32_capset_wrapper)		/* 185 */
-SYSCALL(sys_sigaltstack,sys_sigaltstack,sys32_sigaltstack_wrapper)
+SYSCALL(sys_sigaltstack,sys_sigaltstack,compat_sys_sigaltstack)
 SYSCALL(sys_sendfile,sys_sendfile64,sys32_sendfile_wrapper)
 NI_SYSCALL							/* streams1 */
 NI_SYSCALL							/* streams2 */
@@ -246,7 +246,7 @@ SYSCALL(sys_lremovexattr,sys_lremovexattr,sys32_lremovexattr_wrapper)
 SYSCALL(sys_fremovexattr,sys_fremovexattr,sys32_fremovexattr_wrapper)	/* 235 */
 SYSCALL(sys_gettid,sys_gettid,sys_gettid)
 SYSCALL(sys_tkill,sys_tkill,sys_tkill_wrapper)
-SYSCALL(sys_futex,sys_futex,compat_sys_futex_wrapper)
+SYSCALL(sys_futex,sys_futex,compat_sys_futex)
 SYSCALL(sys_sched_setaffinity,sys_sched_setaffinity,sys32_sched_setaffinity_wrapper)
 SYSCALL(sys_sched_getaffinity,sys_sched_getaffinity,sys32_sched_getaffinity_wrapper)	/* 240 */
 SYSCALL(sys_tgkill,sys_tgkill,sys_tgkill_wrapper)
@@ -289,14 +289,14 @@ SYSCALL(sys_kexec_load,sys_kexec_load,compat_sys_kexec_load_wrapper)
 SYSCALL(sys_add_key,sys_add_key,compat_sys_add_key_wrapper)
 SYSCALL(sys_request_key,sys_request_key,compat_sys_request_key_wrapper)
 SYSCALL(sys_keyctl,sys_keyctl,compat_sys_keyctl_wrapper)		/* 280 */
-SYSCALL(sys_waitid,sys_waitid,compat_sys_waitid_wrapper)
+SYSCALL(sys_waitid,sys_waitid,compat_sys_waitid)
 SYSCALL(sys_ioprio_set,sys_ioprio_set,sys_ioprio_set_wrapper)
 SYSCALL(sys_ioprio_get,sys_ioprio_get,sys_ioprio_get_wrapper)
 SYSCALL(sys_inotify_init,sys_inotify_init,sys_inotify_init)
 SYSCALL(sys_inotify_add_watch,sys_inotify_add_watch,sys_inotify_add_watch_wrapper)	/* 285 */
 SYSCALL(sys_inotify_rm_watch,sys_inotify_rm_watch,sys_inotify_rm_watch_wrapper)
 NI_SYSCALL							/* 287 sys_migrate_pages */
-SYSCALL(sys_openat,sys_openat,compat_sys_openat_wrapper)
+SYSCALL(sys_openat,sys_openat,compat_sys_openat)
 SYSCALL(sys_mkdirat,sys_mkdirat,sys_mkdirat_wrapper)
 SYSCALL(sys_mknodat,sys_mknodat,sys_mknodat_wrapper)	/* 290 */
 SYSCALL(sys_fchownat,sys_fchownat,sys_fchownat_wrapper)
@@ -312,8 +312,8 @@ SYSCALL(sys_faccessat,sys_faccessat,sys_faccessat_wrapper)	/* 300 */
 SYSCALL(sys_pselect6,sys_pselect6,compat_sys_pselect6_wrapper)
 SYSCALL(sys_ppoll,sys_ppoll,compat_sys_ppoll_wrapper)
 SYSCALL(sys_unshare,sys_unshare,sys_unshare_wrapper)
-SYSCALL(sys_set_robust_list,sys_set_robust_list,compat_sys_set_robust_list_wrapper)
-SYSCALL(sys_get_robust_list,sys_get_robust_list,compat_sys_get_robust_list_wrapper)
+SYSCALL(sys_set_robust_list,sys_set_robust_list,compat_sys_set_robust_list)
+SYSCALL(sys_get_robust_list,sys_get_robust_list,compat_sys_get_robust_list)
 SYSCALL(sys_splice,sys_splice,sys_splice_wrapper)
 SYSCALL(sys_sync_file_range,sys_sync_file_range,sys_sync_file_range_wrapper)
 SYSCALL(sys_tee,sys_tee,sys_tee_wrapper)
@@ -328,8 +328,8 @@ SYSCALL(sys_signalfd,sys_signalfd,compat_sys_signalfd_wrapper)
 NI_SYSCALL						/* 317 old sys_timer_fd */
 SYSCALL(sys_eventfd,sys_eventfd,sys_eventfd_wrapper)
 SYSCALL(sys_timerfd_create,sys_timerfd_create,sys_timerfd_create_wrapper)
-SYSCALL(sys_timerfd_settime,sys_timerfd_settime,compat_sys_timerfd_settime_wrapper) /* 320 */
-SYSCALL(sys_timerfd_gettime,sys_timerfd_gettime,compat_sys_timerfd_gettime_wrapper)
+SYSCALL(sys_timerfd_settime,sys_timerfd_settime,compat_sys_timerfd_settime) /* 320 */
+SYSCALL(sys_timerfd_gettime,sys_timerfd_gettime,compat_sys_timerfd_gettime)
 SYSCALL(sys_signalfd4,sys_signalfd4,compat_sys_signalfd4_wrapper)
 SYSCALL(sys_eventfd2,sys_eventfd2,sys_eventfd2_wrapper)
 SYSCALL(sys_inotify_init1,sys_inotify_init1,sys_inotify_init1_wrapper)
@@ -338,13 +338,13 @@ SYSCALL(sys_dup3,sys_dup3,sys_dup3_wrapper)
 SYSCALL(sys_epoll_create1,sys_epoll_create1,sys_epoll_create1_wrapper)
 SYSCALL(sys_preadv,sys_preadv,compat_sys_preadv_wrapper)
 SYSCALL(sys_pwritev,sys_pwritev,compat_sys_pwritev_wrapper)
-SYSCALL(sys_rt_tgsigqueueinfo,sys_rt_tgsigqueueinfo,compat_sys_rt_tgsigqueueinfo_wrapper) /* 330 */
+SYSCALL(sys_rt_tgsigqueueinfo,sys_rt_tgsigqueueinfo,compat_sys_rt_tgsigqueueinfo) /* 330 */
 SYSCALL(sys_perf_event_open,sys_perf_event_open,sys_perf_event_open_wrapper)
 SYSCALL(sys_fanotify_init,sys_fanotify_init,sys_fanotify_init_wrapper)
 SYSCALL(sys_fanotify_mark,sys_fanotify_mark,sys_fanotify_mark_wrapper)
 SYSCALL(sys_prlimit64,sys_prlimit64,sys_prlimit64_wrapper)
 SYSCALL(sys_name_to_handle_at,sys_name_to_handle_at,sys_name_to_handle_at_wrapper) /* 335 */
-SYSCALL(sys_open_by_handle_at,sys_open_by_handle_at,compat_sys_open_by_handle_at_wrapper)
+SYSCALL(sys_open_by_handle_at,sys_open_by_handle_at,compat_sys_open_by_handle_at)
 SYSCALL(sys_clock_adjtime,sys_clock_adjtime,compat_sys_clock_adjtime_wrapper)
 SYSCALL(sys_syncfs,sys_syncfs,sys_syncfs_wrapper)
 SYSCALL(sys_setns,sys_setns,sys_setns_wrapper)

arch/score/Kconfig

@@ -14,6 +14,7 @@ config SCORE
        select HAVE_MOD_ARCH_SPECIFIC
 	select MODULES_USE_ELF_REL
 	select CLONE_BACKWARDS
+	select GENERIC_SIGALTSTACK
 
 choice
 	prompt "System type"

arch/score/include/asm/syscalls.h

@@ -1,7 +1,6 @@
 #ifndef _ASM_SCORE_SYSCALLS_H
 #define _ASM_SCORE_SYSCALLS_H
 
-asmlinkage long score_sigaltstack(struct pt_regs *regs);
 asmlinkage long score_rt_sigreturn(struct pt_regs *regs);
 
 #include <asm-generic/syscalls.h>

arch/score/kernel/entry.S

@@ -491,8 +491,3 @@ ENTRY(sys_rt_sigreturn)
 	mv	r4, r0
 	la	r8, score_rt_sigreturn
 	br	r8
-
-ENTRY(sys_sigaltstack)
-	mv	r4, r0
-	la	r8, score_sigaltstack
-	br	r8

arch/score/kernel/signal.c

@@ -133,16 +133,6 @@ static void __user *get_sigframe(struct k_sigaction *ka,
 	return (void __user*)((sp - frame_size) & ~7);
 }
 
-asmlinkage long
-score_sigaltstack(struct pt_regs *regs)
-{
-	const stack_t __user *uss = (const stack_t __user *) regs->regs[4];
-	stack_t __user *uoss = (stack_t __user *) regs->regs[5];
-	unsigned long usp = regs->regs[0];
-
-	return do_sigaltstack(uss, uoss, usp);
-}
-
 asmlinkage long
 score_rt_sigreturn(struct pt_regs *regs)
 {
@@ -167,9 +157,7 @@ score_rt_sigreturn(struct pt_regs *regs)
 	else if (sig)
 		force_sig(sig, current);
 
-	/* It is more difficult to avoid calling this function than to
-	   call it and ignore errors.  */
-	if (do_sigaltstack(&frame->rs_uc.uc_stack, NULL, regs->regs[0]) == -EFAULT)
+	if (restore_altstack(&frame->rs_uc.uc_stack))
 		goto badframe;
 	regs->is_syscall = 0;
 
@@ -209,12 +197,7 @@ static int setup_rt_frame(struct k_sigaction *ka, struct pt_regs *regs,
 	err |= copy_siginfo_to_user(&frame->rs_info, info);
 	err |= __put_user(0, &frame->rs_uc.uc_flags);
 	err |= __put_user(NULL, &frame->rs_uc.uc_link);
-	err |= __put_user((void __user *)current->sas_ss_sp,
-				&frame->rs_uc.uc_stack.ss_sp);
-	err |= __put_user(sas_ss_flags(regs->regs[0]),
-				&frame->rs_uc.uc_stack.ss_flags);
-	err |= __put_user(current->sas_ss_size,
-				&frame->rs_uc.uc_stack.ss_size);
+	err |= __save_altstack(&frame->rs_uc.uc_stack, regs->regs[0]);
 	err |= setup_sigcontext(regs, &frame->rs_uc.uc_mcontext);
 	err |= __copy_to_user(&frame->rs_uc.uc_sigmask, set, sizeof(*set));
 

arch/sh/Kconfig

@@ -40,6 +40,9 @@ config SUPERH
 	select GENERIC_STRNLEN_USER
 	select HAVE_MOD_ARCH_SPECIFIC if DWARF_UNWINDER
 	select MODULES_USE_ELF_RELA
+	select GENERIC_SIGALTSTACK
+	select OLD_SIGSUSPEND
+	select OLD_SIGACTION
 	help
 	  The SuperH is a RISC processor targeted for use in embedded systems
 	  and consumer electronics; it was also used in the Sega Dreamcast

arch/sh/include/asm/syscalls_32.h

@@ -9,12 +9,6 @@
 
 struct pt_regs;
 
-asmlinkage int sys_sigsuspend(old_sigset_t mask);
-asmlinkage int sys_sigaction(int sig, const struct old_sigaction __user *act,
-			     struct old_sigaction __user *oact);
-asmlinkage int sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss,
-			       unsigned long r6, unsigned long r7,
-			       struct pt_regs __regs);
 asmlinkage int sys_sigreturn(unsigned long r4, unsigned long r5,
 			     unsigned long r6, unsigned long r7,
 			     struct pt_regs __regs);

arch/sh/include/uapi/asm/signal.h

@@ -5,11 +5,13 @@
 
 #include <asm-generic/signal.h>
 
+#ifndef __KERNEL__
 struct old_sigaction {
 	__sighandler_t sa_handler;
 	old_sigset_t sa_mask;
 	unsigned long sa_flags;
 	void (*sa_restorer)(void);
 };
+#endif
 
 #endif /* __ASM_SH_SIGNAL_H */

arch/sh/kernel/signal_32.c

@@ -46,60 +46,6 @@ struct fdpic_func_descriptor {
  */
 #define UNWINDGUARD 64
 
-/*
- * Atomically swap in the new signal mask, and wait for a signal.
- */
-asmlinkage int
-sys_sigsuspend(old_sigset_t mask)
-{
-	sigset_t blocked;
-	siginitset(&blocked, mask);
-	return sigsuspend(&blocked);
-}
-
-asmlinkage int
-sys_sigaction(int sig, const struct old_sigaction __user *act,
-	      struct old_sigaction __user *oact)
-{
-	struct k_sigaction new_ka, old_ka;
-	int ret;
-
-	if (act) {
-		old_sigset_t mask;
-		if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
-		    __get_user(new_ka.sa.sa_handler, &act->sa_handler) ||
-		    __get_user(new_ka.sa.sa_restorer, &act->sa_restorer) ||
-		    __get_user(new_ka.sa.sa_flags, &act->sa_flags) ||
-		    __get_user(mask, &act->sa_mask))
-			return -EFAULT;
-		siginitset(&new_ka.sa.sa_mask, mask);
-	}
-
-	ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
-
-	if (!ret && oact) {
-		if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
-		    __put_user(old_ka.sa.sa_handler, &oact->sa_handler) ||
-		    __put_user(old_ka.sa.sa_restorer, &oact->sa_restorer) ||
-		    __put_user(old_ka.sa.sa_flags, &oact->sa_flags) ||
-		    __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask))
-			return -EFAULT;
-	}
-
-	return ret;
-}
-
-asmlinkage int
-sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss,
-		unsigned long r6, unsigned long r7,
-		struct pt_regs __regs)
-{
-	struct pt_regs *regs = RELOC_HIDE(&__regs, 0);
-
-	return do_sigaltstack(uss, uoss, regs->regs[15]);
-}
-
-
 /*
  * Do a signal return; undo the signal stack.
  */
@@ -257,8 +203,7 @@ asmlinkage int sys_rt_sigreturn(unsigned long r4, unsigned long r5,
 	if (restore_sigcontext(regs, &frame->uc.uc_mcontext, &r0))
 		goto badframe;
 
-	if (do_sigaltstack(&frame->uc.uc_stack, NULL,
-			   regs->regs[15]) == -EFAULT)
+	if (restore_altstack(&frame->uc.uc_stack))
 		goto badframe;
 
 	return r0;
@@ -423,11 +368,7 @@ static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
 	/* Create the ucontext.  */
 	err |= __put_user(0, &frame->uc.uc_flags);
 	err |= __put_user(NULL, &frame->uc.uc_link);
-	err |= __put_user((void *)current->sas_ss_sp,
-			  &frame->uc.uc_stack.ss_sp);
-	err |= __put_user(sas_ss_flags(regs->regs[15]),
-			  &frame->uc.uc_stack.ss_flags);
-	err |= __put_user(current->sas_ss_size, &frame->uc.uc_stack.ss_size);
+	err |= __save_altstack(&frame->uc.uc_stack, regs->regs[15]);
 	err |= setup_sigcontext(&frame->uc.uc_mcontext,
 			        regs, set->sig[0]);
 	err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));