arch/x86/include/asm/linkage.h

   1 #ifndef _ASM_X86_LINKAGE_H
   2 #define _ASM_X86_LINKAGE_H
   3
   4 #undef notrace
   5 #define notrace __attribute__((no_instrument_function))
   6
   7 #ifdef CONFIG_X86_32
   8 #define asmlinkage CPP_ASMLINKAGE __attribute__((regparm(0)))
   9 /*
  10  * For 32-bit UML - mark functions implemented in assembly that use
  11  * regparm input parameters:
  12  */
  13 #define asmregparm __attribute__((regparm(3)))
  14
  15 /*
  16  * Make sure the compiler doesn't do anything stupid with the
  17  * arguments on the stack - they are owned by the *caller*, not
  18  * the callee. This just fools gcc into not spilling into them,
  19  * and keeps it from doing tailcall recursion and/or using the
  20  * stack slots for temporaries, since they are live and "used"
  21  * all the way to the end of the function.
  22  *
  23  * NOTE! On x86-64, all the arguments are in registers, so this
  24  * only matters on a 32-bit kernel.
  25  */
  26 #define asmlinkage_protect(n, ret, args...) \
  27         __asmlinkage_protect##n(ret, ##args)
  28 #define __asmlinkage_protect_n(ret, args...) \
  29         __asm__ __volatile__ ("" : "=r" (ret) : "0" (ret), ##args)
  30 #define __asmlinkage_protect0(ret) \
  31         __asmlinkage_protect_n(ret)
  32 #define __asmlinkage_protect1(ret, arg1) \
  33         __asmlinkage_protect_n(ret, "g" (arg1))
  34 #define __asmlinkage_protect2(ret, arg1, arg2) \
  35         __asmlinkage_protect_n(ret, "g" (arg1), "g" (arg2))
  36 #define __asmlinkage_protect3(ret, arg1, arg2, arg3) \
  37         __asmlinkage_protect_n(ret, "g" (arg1), "g" (arg2), "g" (arg3))
  38 #define __asmlinkage_protect4(ret, arg1, arg2, arg3, arg4) \
  39         __asmlinkage_protect_n(ret, "g" (arg1), "g" (arg2), "g" (arg3), \
  40                               "g" (arg4))
  41 #define __asmlinkage_protect5(ret, arg1, arg2, arg3, arg4, arg5) \
  42         __asmlinkage_protect_n(ret, "g" (arg1), "g" (arg2), "g" (arg3), \
  43                               "g" (arg4), "g" (arg5))
  44 #define __asmlinkage_protect6(ret, arg1, arg2, arg3, arg4, arg5, arg6) \
  45         __asmlinkage_protect_n(ret, "g" (arg1), "g" (arg2), "g" (arg3), \
  46                               "g" (arg4), "g" (arg5), "g" (arg6))
  47
  48 #endif /* CONFIG_X86_32 */
  49
  50 #ifdef __ASSEMBLY__
  51
  52 #define GLOBAL(name)    \
  53         .globl name;    \
  54         name:
  55
  56 #ifdef CONFIG_X86_64
  57 #define __ALIGN .p2align 4,,15
  58 #define __ALIGN_STR ".p2align 4,,15"
  59 #endif
  60
  61 #ifdef CONFIG_X86_ALIGNMENT_16
  62 #define __ALIGN .align 16,0x90
  63 #define __ALIGN_STR ".align 16,0x90"
  64 #endif
  65
  66 #endif /* __ASSEMBLY__ */
  67
  68 #endif /* _ASM_X86_LINKAGE_H */
  69