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author | Al Viro <viro@zeniv.linux.org.uk> | 2008-08-17 21:05:42 -0400 |
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committer | H. Peter Anvin <hpa@zytor.com> | 2008-10-22 22:55:20 -0700 |
commit | bb8985586b7a906e116db835c64773b7a7d51663 (patch) | |
tree | de93ae58e88cc563d95cc124a73f3930594c6100 /arch/x86/include/asm/linkage.h | |
parent | 8ede0bdb63305d3353efd97e9af6210afb05734e (diff) | |
download | linux-stable-bb8985586b7a906e116db835c64773b7a7d51663.tar.gz linux-stable-bb8985586b7a906e116db835c64773b7a7d51663.tar.bz2 linux-stable-bb8985586b7a906e116db835c64773b7a7d51663.zip |
x86, um: ... and asm-x86 move
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Diffstat (limited to 'arch/x86/include/asm/linkage.h')
-rw-r--r-- | arch/x86/include/asm/linkage.h | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/arch/x86/include/asm/linkage.h b/arch/x86/include/asm/linkage.h new file mode 100644 index 000000000000..42d8b62ee8ab --- /dev/null +++ b/arch/x86/include/asm/linkage.h @@ -0,0 +1,61 @@ +#ifndef ASM_X86__LINKAGE_H +#define ASM_X86__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 /* ASM_X86__LINKAGE_H */ + |