src/third_party/libc++abi/trunk/src/Unwind/assembly.h

   1 /* ===-- assembly.h - libUnwind 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 libUnwind assembler source.
  11  * This file is not part of the interface of this library.
  12  *
  13  * ===----------------------------------------------------------------------===
  14  */
  15
  16 #ifndef UNWIND_ASSEMBLY_H
  17 #define UNWIND_ASSEMBLY_H
  18
  19 #if defined(__POWERPC__) || defined(__powerpc__) || defined(__ppc__)
  20 #define SEPARATOR @
  21 #elif defined(__arm64__)
  22 #define SEPARATOR %%
  23 #else
  24 #define SEPARATOR ;
  25 #endif
  26
  27 #if defined(__APPLE__)
  28 #define HIDDEN_DIRECTIVE .private_extern
  29 #else
  30 #define HIDDEN_DIRECTIVE .hidden
  31 #endif
  32
  33 #define GLUE2(a, b) a ## b
  34 #define GLUE(a, b) GLUE2(a, b)
  35 #define SYMBOL_NAME(name) GLUE(__USER_LABEL_PREFIX__, name)
  36
  37 #if defined(__APPLE__)
  38 #define SYMBOL_IS_FUNC(name)
  39 #elif defined(__ELF__)
  40 #if defined(__arm__)
  41 #define SYMBOL_IS_FUNC(name) .type name,%function
  42 #else
  43 #define SYMBOL_IS_FUNC(name) .type name,@function
  44 #endif
  45 #else
  46 #define SYMBOL_IS_FUNC(name)                                                   \
  47   .def name SEPARATOR                                                          \
  48     .scl 2 SEPARATOR                                                           \
  49     .type 32 SEPARATOR                                                         \
  50   .endef
  51 #endif
  52
  53 #define DEFINE_LIBUNWIND_FUNCTION(name)                   \
  54   .globl SYMBOL_NAME(name) SEPARATOR                      \
  55   SYMBOL_IS_FUNC(SYMBOL_NAME(name)) SEPARATOR             \
  56   SYMBOL_NAME(name):
  57
  58 #define DEFINE_LIBUNWIND_PRIVATE_FUNCTION(name)           \
  59   .globl SYMBOL_NAME(name) SEPARATOR                      \
  60   HIDDEN_DIRECTIVE SYMBOL_NAME(name) SEPARATOR            \
  61   SYMBOL_IS_FUNC(SYMBOL_NAME(name)) SEPARATOR             \
  62   SYMBOL_NAME(name):
  63
  64 #endif /* UNWIND_ASSEMBLY_H */