include/asm-x86/linkage.h

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