contrib/libunwind/src/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(__powerpc64__)
  20 #define SEPARATOR ;
  21 #define PPC64_OFFS_SRR0   0
  22 #define PPC64_OFFS_CR     272
  23 #define PPC64_OFFS_XER    280
  24 #define PPC64_OFFS_LR     288
  25 #define PPC64_OFFS_CTR    296
  26 #define PPC64_OFFS_VRSAVE 304
  27 #define PPC64_OFFS_FP     312
  28 #define PPC64_OFFS_V      824
  29 #ifdef _ARCH_PWR8
  30 #define PPC64_HAS_VMX
  31 #endif
  32 #elif defined(__POWERPC__) || defined(__powerpc__) || defined(__ppc__)
  33 #define SEPARATOR @
  34 #elif defined(__arm64__)
  35 #define SEPARATOR %%
  36 #else
  37 #define SEPARATOR ;
  38 #endif
  39
  40 #define GLUE2(a, b) a ## b
  41 #define GLUE(a, b) GLUE2(a, b)
  42 #define SYMBOL_NAME(name) GLUE(__USER_LABEL_PREFIX__, name)
  43
  44 #if defined(__APPLE__)
  45
  46 #define SYMBOL_IS_FUNC(name)
  47 #define EXPORT_SYMBOL(name)
  48 #define HIDDEN_SYMBOL(name) .private_extern name
  49 #define NO_EXEC_STACK_DIRECTIVE
  50
  51 #elif defined(__ELF__)
  52
  53 #if defined(__arm__)
  54 #define SYMBOL_IS_FUNC(name) .type name,%function
  55 #else
  56 #define SYMBOL_IS_FUNC(name) .type name,@function
  57 #endif
  58 #define EXPORT_SYMBOL(name)
  59 #define HIDDEN_SYMBOL(name) .hidden name
  60
  61 #if defined(__GNU__) || defined(__FreeBSD__) || defined(__Fuchsia__) || \
  62     defined(__linux__)
  63 #define NO_EXEC_STACK_DIRECTIVE .section .note.GNU-stack,"",%progbits
  64 #else
  65 #define NO_EXEC_STACK_DIRECTIVE
  66 #endif
  67
  68 #elif defined(_WIN32)
  69
  70 #define SYMBOL_IS_FUNC(name)                                                   \
  71   .def name SEPARATOR                                                          \
  72     .scl 2 SEPARATOR                                                           \
  73     .type 32 SEPARATOR                                                         \
  74   .endef
  75 #define EXPORT_SYMBOL2(name)                              \
  76   .section .drectve,"yn" SEPARATOR                        \
  77   .ascii "-export:", #name, "\0" SEPARATOR                \
  78   .text
  79 #if defined(_LIBUNWIND_DISABLE_VISIBILITY_ANNOTATIONS)
  80 #define EXPORT_SYMBOL(name)
  81 #else
  82 #define EXPORT_SYMBOL(name) EXPORT_SYMBOL2(name)
  83 #endif
  84 #define HIDDEN_SYMBOL(name)
  85
  86 #define NO_EXEC_STACK_DIRECTIVE
  87
  88 #elif defined(__sparc__)
  89
  90 #else
  91
  92 #error Unsupported target
  93
  94 #endif
  95
  96 #define DEFINE_LIBUNWIND_FUNCTION(name)                   \
  97   .globl SYMBOL_NAME(name) SEPARATOR                      \
  98   EXPORT_SYMBOL(name) SEPARATOR                           \
  99   SYMBOL_IS_FUNC(SYMBOL_NAME(name)) SEPARATOR             \
 100   SYMBOL_NAME(name):
 101
 102 #define DEFINE_LIBUNWIND_PRIVATE_FUNCTION(name)           \
 103   .globl SYMBOL_NAME(name) SEPARATOR                      \
 104   HIDDEN_SYMBOL(SYMBOL_NAME(name)) SEPARATOR              \
 105   SYMBOL_IS_FUNC(SYMBOL_NAME(name)) SEPARATOR             \
 106   SYMBOL_NAME(name):
 107
 108 #if defined(__arm__)
 109 #if !defined(__ARM_ARCH)
 110 #define __ARM_ARCH 4
 111 #endif
 112
 113 #if defined(__ARM_ARCH_4T__) || __ARM_ARCH >= 5
 114 #define ARM_HAS_BX
 115 #endif
 116
 117 #ifdef ARM_HAS_BX
 118 #define JMP(r) bx r
 119 #else
 120 #define JMP(r) mov pc, r
 121 #endif
 122 #endif /* __arm__ */
 123
 124 #endif /* UNWIND_ASSEMBLY_H */