lib/assembly.h

   1 /* ===-- assembly.h - compiler-rt assembler support macros -----------------===
   2  *
   3  *                     The LLVM Compiler Infrastructure
   4  *
   5  * This file is dual licensed under the MIT and the University of Illinois Open
   6  * Source Licenses. See LICENSE.TXT for details.
   7  *
   8  * ===----------------------------------------------------------------------===
   9  *
  10  * This file defines macros for use in compiler-rt assembler source.
  11  * This file is not part of the interface of this library.
  12  *
  13  * ===----------------------------------------------------------------------===
  14  */
  15
  16 #ifndef COMPILERRT_ASSEMBLY_H
  17 #define COMPILERRT_ASSEMBLY_H
  18
  19 #if defined(__POWERPC__) || defined(__powerpc__) || defined(__ppc__)
  20 #define SEPARATOR @
  21 #else
  22 #define SEPARATOR ;
  23 #endif
  24
  25 #if defined(__APPLE__)
  26 #define HIDDEN_DIRECTIVE .private_extern
  27 #define LOCAL_LABEL(name) L_##name
  28 #define FILE_LEVEL_DIRECTIVE  .subsections_via_symbols
  29 #else
  30 #define HIDDEN_DIRECTIVE .hidden
  31 #define LOCAL_LABEL(name) .L_##name
  32 #define FILE_LEVEL_DIRECTIVE
  33 #endif
  34
  35 #define GLUE2(a, b) a ## b
  36 #define GLUE(a, b) GLUE2(a, b)
  37 #define SYMBOL_NAME(name) GLUE(__USER_LABEL_PREFIX__, name)
  38
  39 #ifdef VISIBILITY_HIDDEN
  40 #define DECLARE_SYMBOL_VISIBILITY(name)                    \
  41   HIDDEN_DIRECTIVE SYMBOL_NAME(name) SEPARATOR
  42 #else
  43 #define DECLARE_SYMBOL_VISIBILITY(name)
  44 #endif
  45
  46 #define DEFINE_COMPILERRT_FUNCTION(name)                   \
  47   FILE_LEVEL_DIRECTIVE     SEPARATOR                       \
  48   .globl SYMBOL_NAME(name) SEPARATOR                       \
  49   DECLARE_SYMBOL_VISIBILITY(name)                          \
  50   SYMBOL_NAME(name):
  51
  52 #define DEFINE_COMPILERRT_PRIVATE_FUNCTION(name)           \
  53   .globl SYMBOL_NAME(name) SEPARATOR                       \
  54   HIDDEN_DIRECTIVE SYMBOL_NAME(name) SEPARATOR             \
  55   SYMBOL_NAME(name):
  56
  57 #define DEFINE_COMPILERRT_PRIVATE_FUNCTION_UNMANGLED(name) \
  58   .globl name SEPARATOR                                    \
  59   HIDDEN_DIRECTIVE name SEPARATOR                          \
  60   name:
  61
  62 #define DEFINE_COMPILERRT_FUNCTION_ALIAS(name, target)     \
  63   .globl SYMBOL_NAME(name) SEPARATOR                       \
  64   .set SYMBOL_NAME(name), SYMBOL_NAME(target) SEPARATOR
  65
  66 #if defined (__ARM_EABI__)
  67 # define DEFINE_AEABI_FUNCTION_ALIAS(aeabi_name, name)      \
  68   DEFINE_COMPILERRT_FUNCTION_ALIAS(aeabi_name, name)
  69 #else
  70 # define DEFINE_AEABI_FUNCTION_ALIAS(aeabi_name, name)
  71 #endif
  72
  73 #endif /* COMPILERRT_ASSEMBLY_H */