include/linux/linkage.h

   1 #ifndef _LINUX_LINKAGE_H
   2 #define _LINUX_LINKAGE_H
   3
   4 #include <asm/linkage.h>
   5
   6 #ifdef __cplusplus
   7 #define CPP_ASMLINKAGE extern "C"
   8 #else
   9 #define CPP_ASMLINKAGE
  10 #endif
  11
  12 #ifndef asmlinkage
  13 #define asmlinkage CPP_ASMLINKAGE
  14 #endif
  15
  16 #ifndef asmregparm
  17 # define asmregparm
  18 #endif
  19
  20 #ifndef prevent_tail_call
  21 # define prevent_tail_call(ret) do { } while (0)
  22 #endif
  23
  24 #ifndef __ALIGN
  25 #define __ALIGN         .align 4,0x90
  26 #define __ALIGN_STR     ".align 4,0x90"
  27 #endif
  28
  29 #ifdef __ASSEMBLY__
  30
  31 #define ALIGN __ALIGN
  32 #define ALIGN_STR __ALIGN_STR
  33
  34 #ifndef ENTRY
  35 #define ENTRY(name) \
  36   .globl name; \
  37   ALIGN; \
  38   name:
  39 #endif
  40
  41 #ifndef WEAK
  42 #define WEAK(name)         \
  43         .weak name;        \
  44         name:
  45 #endif
  46
  47 #define KPROBE_ENTRY(name) \
  48   .pushsection .kprobes.text, "ax"; \
  49   ENTRY(name)
  50
  51 #define KPROBE_END(name) \
  52   END(name);             \
  53   .popsection
  54
  55 #ifndef END
  56 #define END(name) \
  57   .size name, .-name
  58 #endif
  59
  60 /* If symbol 'name' is treated as a subroutine (gets called, and returns)
  61  * then please use ENDPROC to mark 'name' as STT_FUNC for the benefit of
  62  * static analysis tools such as stack depth analyzer.
  63  */
  64 #ifndef ENDPROC
  65 #define ENDPROC(name) \
  66   .type name, @function; \
  67   END(name)
  68 #endif
  69
  70 #endif
  71
  72 #define NORET_TYPE    /**/
  73 #define ATTRIB_NORET  __attribute__((noreturn))
  74 #define NORET_AND     noreturn,
  75
  76 #endif