include/linux/linkage.h

   1 #ifndef _LINUX_LINKAGE_H
   2 #define _LINUX_LINKAGE_H
   3
   4 #include <linux/config.h>
   5
   6 #ifdef __cplusplus
   7 #define CPP_ASMLINKAGE extern "C"
   8 #else
   9 #define CPP_ASMLINKAGE
  10 #endif
  11
  12 #if defined __i386__
  13 #define asmlinkage CPP_ASMLINKAGE __attribute__((regparm(0)))
  14 #elif defined __ia64__
  15 #define asmlinkage CPP_ASMLINKAGE __attribute__((syscall_linkage))
  16 #else
  17 #define asmlinkage CPP_ASMLINKAGE
  18 #endif
  19
  20 #define SYMBOL_NAME_STR(X) #X
  21 #define SYMBOL_NAME(X) X
  22 #ifdef __STDC__
  23 #define SYMBOL_NAME_LABEL(X) X##:
  24 #else
  25 #define SYMBOL_NAME_LABEL(X) X/**/:
  26 #endif
  27
  28 #ifdef __arm__
  29 #define __ALIGN .align 0
  30 #define __ALIGN_STR ".align 0"
  31 #else
  32 #ifdef __mc68000__
  33 #define __ALIGN .align 4
  34 #define __ALIGN_STR ".align 4"
  35 #else
  36 #ifdef __sh__
  37 #define __ALIGN .balign 4
  38 #define __ALIGN_STR ".balign 4"
  39 #else
  40 #if defined(__i386__) && defined(CONFIG_X86_ALIGNMENT_16)
  41 #define __ALIGN .align 16,0x90
  42 #define __ALIGN_STR ".align 16,0x90"
  43 #else
  44 #define __ALIGN .align 4,0x90
  45 #define __ALIGN_STR ".align 4,0x90"
  46 #endif
  47 #endif /* __sh__ */
  48 #endif /* __mc68000__ */
  49 #endif /* __arm__ */
  50
  51 #ifdef __ASSEMBLY__
  52
  53 #define ALIGN __ALIGN
  54 #define ALIGN_STR __ALIGN_STR
  55
  56 #define ENTRY(name) \
  57   .globl SYMBOL_NAME(name); \
  58   ALIGN; \
  59   SYMBOL_NAME_LABEL(name)
  60
  61 #endif
  62
  63 #endif