diff options
Diffstat (limited to 'arch/x86/entry/thunk_32.S')
| -rw-r--r-- | arch/x86/entry/thunk_32.S | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/arch/x86/entry/thunk_32.S b/arch/x86/entry/thunk_32.S new file mode 100644 index 0000000000..ff6e7003da --- /dev/null +++ b/arch/x86/entry/thunk_32.S @@ -0,0 +1,36 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * 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) + */ + #include <linux/linkage.h> + #include <asm/asm.h> + #include <asm/export.h> + + /* put return address in eax (arg1) */ + .macro THUNK name, func, put_ret_addr_in_eax=0 +SYM_CODE_START_NOALIGN(\name) + pushl %eax + pushl %ecx + pushl %edx + + .if \put_ret_addr_in_eax + /* Place EIP in the arg1 */ + movl 3*4(%esp), %eax + .endif + + call \func + popl %edx + popl %ecx + popl %eax + RET + _ASM_NOKPROBE(\name) +SYM_CODE_END(\name) + .endm + + THUNK preempt_schedule_thunk, preempt_schedule + THUNK preempt_schedule_notrace_thunk, preempt_schedule_notrace + EXPORT_SYMBOL(preempt_schedule_thunk) + EXPORT_SYMBOL(preempt_schedule_notrace_thunk) + |