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- /*
- * Trampoline to trace irqs off. (otherwise CALLER_ADDR1 might crash)
- * Copyright 2008 by Steven Rostedt, Red Hat, Inc
- * (inspired by Andi Kleen's thunk_64.S)
- * Subject to the GNU public license, v.2. No warranty of any kind.
- */
- #include <linux/linkage.h>
- #include <asm/asm.h>
- #include <asm/dwarf2.h>
- /* put return address in eax (arg1) */
- .macro THUNK name, func, put_ret_addr_in_eax=0
- .globl \name
- \name:
- CFI_STARTPROC
- pushl_cfi %eax
- CFI_REL_OFFSET eax, 0
- pushl_cfi %ecx
- CFI_REL_OFFSET ecx, 0
- pushl_cfi %edx
- CFI_REL_OFFSET edx, 0
- .if \put_ret_addr_in_eax
- /* Place EIP in the arg1 */
- movl 3*4(%esp), %eax
- .endif
- call \func
- popl_cfi %edx
- CFI_RESTORE edx
- popl_cfi %ecx
- CFI_RESTORE ecx
- popl_cfi %eax
- CFI_RESTORE eax
- ret
- CFI_ENDPROC
- _ASM_NOKPROBE(\name)
- .endm
- #ifdef CONFIG_TRACE_IRQFLAGS
- THUNK trace_hardirqs_on_thunk,trace_hardirqs_on_caller,1
- THUNK trace_hardirqs_off_thunk,trace_hardirqs_off_caller,1
- #endif
- #ifdef CONFIG_PREEMPT
- THUNK ___preempt_schedule, preempt_schedule
- #ifdef CONFIG_CONTEXT_TRACKING
- THUNK ___preempt_schedule_context, preempt_schedule_context
- #endif
- #endif
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