assembly.h revision 302408 
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#if defined(__arm__)
65#if !defined(__ARM_ARCH)
66#define __ARM_ARCH 4
67#endif
68
69#if defined(__ARM_ARCH_4T__) || __ARM_ARCH >= 5
70#define ARM_HAS_BX
71#endif
72
73#ifdef ARM_HAS_BX
74#define JMP(r) bx r
75#else
76#define JMP(r) mov pc, r
77#endif
78#endif /* __arm__ */
79
80#endif /* UNWIND_ASSEMBLY_H */
81