78a9909aab
notrace signals that a function should not be traced. Most of the time this is used by tracers to annotate code that cannot be traced - it's in a volatile state (such as in user vdso context or NMI context) or it's in the tracer internals. Signed-off-by: Ingo Molnar <mingo@elte.hu>
62 lines
2.1 KiB
C
62 lines
2.1 KiB
C
#ifndef __ASM_LINKAGE_H
|
|
#define __ASM_LINKAGE_H
|
|
|
|
#undef notrace
|
|
#define notrace __attribute__((no_instrument_function))
|
|
|
|
#ifdef CONFIG_X86_64
|
|
#define __ALIGN .p2align 4,,15
|
|
#define __ALIGN_STR ".p2align 4,,15"
|
|
#endif
|
|
|
|
#ifdef CONFIG_X86_32
|
|
#define asmlinkage CPP_ASMLINKAGE __attribute__((regparm(0)))
|
|
/*
|
|
* For 32-bit UML - mark functions implemented in assembly that use
|
|
* regparm input parameters:
|
|
*/
|
|
#define asmregparm __attribute__((regparm(3)))
|
|
|
|
/*
|
|
* Make sure the compiler doesn't do anything stupid with the
|
|
* arguments on the stack - they are owned by the *caller*, not
|
|
* the callee. This just fools gcc into not spilling into them,
|
|
* and keeps it from doing tailcall recursion and/or using the
|
|
* stack slots for temporaries, since they are live and "used"
|
|
* all the way to the end of the function.
|
|
*
|
|
* NOTE! On x86-64, all the arguments are in registers, so this
|
|
* only matters on a 32-bit kernel.
|
|
*/
|
|
#define asmlinkage_protect(n, ret, args...) \
|
|
__asmlinkage_protect##n(ret, ##args)
|
|
#define __asmlinkage_protect_n(ret, args...) \
|
|
__asm__ __volatile__ ("" : "=r" (ret) : "0" (ret), ##args)
|
|
#define __asmlinkage_protect0(ret) \
|
|
__asmlinkage_protect_n(ret)
|
|
#define __asmlinkage_protect1(ret, arg1) \
|
|
__asmlinkage_protect_n(ret, "g" (arg1))
|
|
#define __asmlinkage_protect2(ret, arg1, arg2) \
|
|
__asmlinkage_protect_n(ret, "g" (arg1), "g" (arg2))
|
|
#define __asmlinkage_protect3(ret, arg1, arg2, arg3) \
|
|
__asmlinkage_protect_n(ret, "g" (arg1), "g" (arg2), "g" (arg3))
|
|
#define __asmlinkage_protect4(ret, arg1, arg2, arg3, arg4) \
|
|
__asmlinkage_protect_n(ret, "g" (arg1), "g" (arg2), "g" (arg3), \
|
|
"g" (arg4))
|
|
#define __asmlinkage_protect5(ret, arg1, arg2, arg3, arg4, arg5) \
|
|
__asmlinkage_protect_n(ret, "g" (arg1), "g" (arg2), "g" (arg3), \
|
|
"g" (arg4), "g" (arg5))
|
|
#define __asmlinkage_protect6(ret, arg1, arg2, arg3, arg4, arg5, arg6) \
|
|
__asmlinkage_protect_n(ret, "g" (arg1), "g" (arg2), "g" (arg3), \
|
|
"g" (arg4), "g" (arg5), "g" (arg6))
|
|
|
|
#endif
|
|
|
|
#ifdef CONFIG_X86_ALIGNMENT_16
|
|
#define __ALIGN .align 16,0x90
|
|
#define __ALIGN_STR ".align 16,0x90"
|
|
#endif
|
|
|
|
#endif
|
|
|