/* * 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_reg eax pushl_cfi_reg ecx pushl_cfi_reg edx .if \put_ret_addr_in_eax /* Place EIP in the arg1 */ movl 3*4(%esp), %eax .endif call \func popl_cfi_reg edx popl_cfi_reg ecx popl_cfi_reg 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