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 #define SYMBOL_NAME_STR(X) #X
  17 #define SYMBOL_NAME(X) X
  18 #ifdef __STDC__
  19 #define SYMBOL_NAME_LABEL(X) X##:
  20 #else
  21 #define SYMBOL_NAME_LABEL(X) X/**/:
  22 #endif
  23
  24 #ifdef __arm__
  25 #define __ALIGN .align 0
  26 #define __ALIGN_STR ".align 0"
  27 #else
  28 #ifdef __mc68000__
  29 #define __ALIGN .align 4
  30 #define __ALIGN_STR ".align 4"
  31 #else
  32 #if !defined(__i486__) && !defined(__i586__)
  33 #define __ALIGN .align 4,0x90
  34 #define __ALIGN_STR ".align 4,0x90"
  35 #else  /* __i486__/__i586__ */
  36 #define __ALIGN .align 16,0x90
  37 #define __ALIGN_STR ".align 16,0x90"
  38 #endif /* __i486__/__i586__ */
  39 #endif /* __mc68000__ */
  40 #endif /* __arm__ */
  41
  42 #ifdef __ASSEMBLY__
  43
  44 #define ALIGN __ALIGN
  45 #define ALIGN_STR __ALIGN_STR
  46
  47 #define ENTRY(name) \
  48   .globl SYMBOL_NAME(name); \
  49   ALIGN; \
  50   SYMBOL_NAME_LABEL(name)
  51
  52 #endif
  53
  54 #endif