include/linux/linkage.h

   1 #ifndef _LINUX_LINKAGE_H
   2 #define _LINUX_LINKAGE_H
   3
   4 #include <asm/linkage.h>
   5
   6 #define notrace __attribute__((no_instrument_function))
   7
   8 #ifdef __cplusplus
   9 #define CPP_ASMLINKAGE extern "C"
  10 #else
  11 #define CPP_ASMLINKAGE
  12 #endif
  13
  14 #ifndef asmlinkage
  15 #define asmlinkage CPP_ASMLINKAGE
  16 #endif
  17
  18 #ifndef asmregparm
  19 # define asmregparm
  20 #endif
  21
  22 /*
  23  * This is used by architectures to keep arguments on the stack
  24  * untouched by the compiler by keeping them live until the end.
  25  * The argument stack may be owned by the assembly-language
  26  * caller, not the callee, and gcc doesn't always understand
  27  * that.
  28  *
  29  * We have the return value, and a maximum of six arguments.
  30  *
  31  * This should always be followed by a "return ret" for the
  32  * protection to work (ie no more work that the compiler might
  33  * end up needing stack temporaries for).
  34  */
  35 /* Assembly files may be compiled with -traditional .. */
  36 #ifndef __ASSEMBLY__
  37 #ifndef asmlinkage_protect
  38 # define asmlinkage_protect(n, ret, args...)    do { } while (0)
  39 #endif
  40 #endif
  41
  42 #ifndef __ALIGN
  43 #define __ALIGN         .align 4,0x90
  44 #define __ALIGN_STR     ".align 4,0x90"
  45 #endif
  46
  47 #ifdef __ASSEMBLY__
  48
  49 #define ALIGN __ALIGN
  50 #define ALIGN_STR __ALIGN_STR
  51
  52 #ifndef ENTRY
  53 #define ENTRY(name) \
  54   .globl name; \
  55   ALIGN; \
  56   name:
  57 #endif
  58
  59 #ifndef WEAK
  60 #define WEAK(name)         \
  61         .weak name;        \
  62         name:
  63 #endif
  64
  65 #define KPROBE_ENTRY(name) \
  66   .pushsection .kprobes.text, "ax"; \
  67   ENTRY(name)
  68
  69 #define KPROBE_END(name) \
  70   END(name);             \
  71   .popsection
  72
  73 #ifndef END
  74 #define END(name) \
  75   .size name, .-name
  76 #endif
  77
  78 /* If symbol 'name' is treated as a subroutine (gets called, and returns)
  79  * then please use ENDPROC to mark 'name' as STT_FUNC for the benefit of
  80  * static analysis tools such as stack depth analyzer.
  81  */
  82 #ifndef ENDPROC
  83 #define ENDPROC(name) \
  84   .type name, @function; \
  85   END(name)
  86 #endif
  87
  88 #endif
  89
  90 #define NORET_TYPE    /**/
  91 #define ATTRIB_NORET  __attribute__((noreturn))
  92 #define NORET_AND     noreturn,
  93
  94 #endif