MIPS: Move register dump routines out of ptrace code

Current register dump methods for MIPS are implemented inside ptrace
methods, but there will be other uses in the kernel for them, so keep
them separately in process.c and use those definitions for ptrace
instead.

Signed-off-by: Marcin Nowakowski <marcin.nowakowski@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/14587/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/include/asm/elf.h

@@ -210,6 +210,9 @@ typedef elf_greg_t elf_gregset_t[ELF_NGREG];
 typedef double elf_fpreg_t;
 typedef elf_fpreg_t elf_fpregset_t[ELF_NFPREG];
 
+void mips_dump_regs32(u32 *uregs, const struct pt_regs *regs);
+void mips_dump_regs64(u64 *uregs, const struct pt_regs *regs);
+
 #ifdef CONFIG_32BIT
 /*
  * This is used to ensure we don't load something for the wrong architecture.

arch/mips/kernel/process.c

@@ -729,3 +729,47 @@ int mips_set_process_fp_mode(struct task_struct *task, unsigned int value)
 
 	return 0;
 }
+
+#if defined(CONFIG_32BIT) || defined(CONFIG_MIPS32_O32)
+void mips_dump_regs32(u32 *uregs, const struct pt_regs *regs)
+{
+	unsigned int i;
+
+	for (i = MIPS32_EF_R1; i <= MIPS32_EF_R31; i++) {
+		/* k0/k1 are copied as zero. */
+		if (i == MIPS32_EF_R26 || i == MIPS32_EF_R27)
+			uregs[i] = 0;
+		else
+			uregs[i] = regs->regs[i - MIPS32_EF_R0];
+	}
+
+	uregs[MIPS32_EF_LO] = regs->lo;
+	uregs[MIPS32_EF_HI] = regs->hi;
+	uregs[MIPS32_EF_CP0_EPC] = regs->cp0_epc;
+	uregs[MIPS32_EF_CP0_BADVADDR] = regs->cp0_badvaddr;
+	uregs[MIPS32_EF_CP0_STATUS] = regs->cp0_status;
+	uregs[MIPS32_EF_CP0_CAUSE] = regs->cp0_cause;
+}
+#endif /* CONFIG_32BIT || CONFIG_MIPS32_O32 */
+
+#ifdef CONFIG_64BIT
+void mips_dump_regs64(u64 *uregs, const struct pt_regs *regs)
+{
+	unsigned int i;
+
+	for (i = MIPS64_EF_R1; i <= MIPS64_EF_R31; i++) {
+		/* k0/k1 are copied as zero. */
+		if (i == MIPS64_EF_R26 || i == MIPS64_EF_R27)
+			uregs[i] = 0;
+		else
+			uregs[i] = regs->regs[i - MIPS64_EF_R0];
+	}
+
+	uregs[MIPS64_EF_LO] = regs->lo;
+	uregs[MIPS64_EF_HI] = regs->hi;
+	uregs[MIPS64_EF_CP0_EPC] = regs->cp0_epc;
+	uregs[MIPS64_EF_CP0_BADVADDR] = regs->cp0_badvaddr;
+	uregs[MIPS64_EF_CP0_STATUS] = regs->cp0_status;
+	uregs[MIPS64_EF_CP0_CAUSE] = regs->cp0_cause;
+}
+#endif /* CONFIG_64BIT */

arch/mips/kernel/ptrace.c

@@ -294,23 +294,8 @@ static int gpr32_get(struct task_struct *target,
 {
 	struct pt_regs *regs = task_pt_regs(target);
 	u32 uregs[ELF_NGREG] = {};
-	unsigned i;
-
-	for (i = MIPS32_EF_R1; i <= MIPS32_EF_R31; i++) {
-		/* k0/k1 are copied as zero. */
-		if (i == MIPS32_EF_R26 || i == MIPS32_EF_R27)
-			continue;
-
-		uregs[i] = regs->regs[i - MIPS32_EF_R0];
-	}
-
-	uregs[MIPS32_EF_LO] = regs->lo;
-	uregs[MIPS32_EF_HI] = regs->hi;
-	uregs[MIPS32_EF_CP0_EPC] = regs->cp0_epc;
-	uregs[MIPS32_EF_CP0_BADVADDR] = regs->cp0_badvaddr;
-	uregs[MIPS32_EF_CP0_STATUS] = regs->cp0_status;
-	uregs[MIPS32_EF_CP0_CAUSE] = regs->cp0_cause;
 
+	mips_dump_regs32(uregs, regs);
 	return user_regset_copyout(&pos, &count, &kbuf, &ubuf, uregs, 0,
 				   sizeof(uregs));
 }
@@ -373,23 +358,8 @@ static int gpr64_get(struct task_struct *target,
 {
 	struct pt_regs *regs = task_pt_regs(target);
 	u64 uregs[ELF_NGREG] = {};
-	unsigned i;
-
-	for (i = MIPS64_EF_R1; i <= MIPS64_EF_R31; i++) {
-		/* k0/k1 are copied as zero. */
-		if (i == MIPS64_EF_R26 || i == MIPS64_EF_R27)
-			continue;
-
-		uregs[i] = regs->regs[i - MIPS64_EF_R0];
-	}
-
-	uregs[MIPS64_EF_LO] = regs->lo;
-	uregs[MIPS64_EF_HI] = regs->hi;
-	uregs[MIPS64_EF_CP0_EPC] = regs->cp0_epc;
-	uregs[MIPS64_EF_CP0_BADVADDR] = regs->cp0_badvaddr;
-	uregs[MIPS64_EF_CP0_STATUS] = regs->cp0_status;
-	uregs[MIPS64_EF_CP0_CAUSE] = regs->cp0_cause;
 
+	mips_dump_regs64(uregs, regs);
 	return user_regset_copyout(&pos, &count, &kbuf, &ubuf, uregs, 0,
 				   sizeof(uregs));
 }