diff options
Diffstat (limited to 'arch/x86/entry/thunk_64.S')
| -rw-r--r-- | arch/x86/entry/thunk_64.S | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/arch/x86/entry/thunk_64.S b/arch/x86/entry/thunk_64.S new file mode 100644 index 000000000..be36bf4e0 --- /dev/null +++ b/arch/x86/entry/thunk_64.S @@ -0,0 +1,73 @@ +/* + * Save registers before calling assembly functions. This avoids + * disturbance of register allocation in some inline assembly constructs. + * Copyright 2001,2002 by Andi Kleen, SuSE Labs. + * Added trace_hardirqs callers - Copyright 2007 Steven Rostedt, Red Hat, Inc. + * Subject to the GNU public license, v.2. No warranty of any kind. + */ +#include <linux/linkage.h> +#include "calling.h" +#include <asm/asm.h> +#include <asm/export.h> + + /* rdi: arg1 ... normal C conventions. rax is saved/restored. */ + .macro THUNK name, func, put_ret_addr_in_rdi=0 + .globl \name + .type \name, @function +\name: + pushq %rbp + movq %rsp, %rbp + + pushq %rdi + pushq %rsi + pushq %rdx + pushq %rcx + pushq %rax + pushq %r8 + pushq %r9 + pushq %r10 + pushq %r11 + + .if \put_ret_addr_in_rdi + /* 8(%rbp) is return addr on stack */ + movq 8(%rbp), %rdi + .endif + + call \func + jmp .L_restore + _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_DEBUG_LOCK_ALLOC + THUNK lockdep_sys_exit_thunk,lockdep_sys_exit +#endif + +#ifdef CONFIG_PREEMPT + THUNK ___preempt_schedule, preempt_schedule + THUNK ___preempt_schedule_notrace, preempt_schedule_notrace + EXPORT_SYMBOL(___preempt_schedule) + EXPORT_SYMBOL(___preempt_schedule_notrace) +#endif + +#if defined(CONFIG_TRACE_IRQFLAGS) \ + || defined(CONFIG_DEBUG_LOCK_ALLOC) \ + || defined(CONFIG_PREEMPT) +.L_restore: + popq %r11 + popq %r10 + popq %r9 + popq %r8 + popq %rax + popq %rcx + popq %rdx + popq %rsi + popq %rdi + popq %rbp + ret + _ASM_NOKPROBE(.L_restore) +#endif |