include/linux/linkage.h

   1 #ifndef _LINUX_LINKAGE_H
   2 #define _LINUX_LINKAGE_H
   3
   4 #ifdef __cplusplus
   5 #define CPP_ASMLINKAGE extern "C"
   6 #else
   7 #define CPP_ASMLINKAGE
   8 #endif
   9
  10 #if defined __i386__ && (__GNUC__ > 2 || __GNUC_MINOR__ > 7)
  11 #define asmlinkage CPP_ASMLINKAGE __attribute__((regparm(0)))
  12 #else
  13 #define asmlinkage CPP_ASMLINKAGE
  14 #endif
  15
  16 #ifdef __sh__
  17 #define STRINGIFY(X) #X
  18 #define SYMBOL_NAME_STR(X) STRINGIFY(SYMBOL_NAME(X))
  19 #ifdef __STDC__
  20 #define SYMBOL_NAME(X) _##X
  21 #define SYMBOL_NAME_LABEL(X) _##X##:
  22 #else
  23 #define SYMBOL_NAME(X) _/**/X
  24 #define SYMBOL_NAME_LABEL(X) _/**/X/**/:
  25 #endif
  26 #else
  27 #define SYMBOL_NAME_STR(X) #X
  28 #define SYMBOL_NAME(X) X
  29 #ifdef __STDC__
  30 #define SYMBOL_NAME_LABEL(X) X##:
  31 #else
  32 #define SYMBOL_NAME_LABEL(X) X/**/:
  33 #endif
  34 #endif
  35
  36 #ifdef __arm__
  37 #define __ALIGN .align 0
  38 #define __ALIGN_STR ".align 0"
  39 #else
  40 #ifdef __mc68000__
  41 #define __ALIGN .align 4
  42 #define __ALIGN_STR ".align 4"
  43 #else
  44 #ifdef __sh__
  45 #define __ALIGN .balign 4
  46 #define __ALIGN_STR ".balign 4"
  47 #else
  48 #if !defined(__i486__) && !defined(__i586__)
  49 #define __ALIGN .align 4,0x90
  50 #define __ALIGN_STR ".align 4,0x90"
  51 #else  /* __i486__/__i586__ */
  52 #define __ALIGN .align 16,0x90
  53 #define __ALIGN_STR ".align 16,0x90"
  54 #endif /* __i486__/__i586__ */
  55 #endif /* __sh__ */
  56 #endif /* __mc68000__ */
  57 #endif /* __arm__ */
  58
  59 #ifdef __ASSEMBLY__
  60
  61 #define ALIGN __ALIGN
  62 #define ALIGN_STR __ALIGN_STR
  63
  64 #define ENTRY(name) \
  65   .globl SYMBOL_NAME(name); \
  66   ALIGN; \
  67   SYMBOL_NAME_LABEL(name)
  68
  69 #endif
  70
  71 #endif