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review.trustedfirmware.org / TF-A / tf-a-tests / 3cd87d77947ec4fc04440268ed122b4ed81c7781 / . / lib / compiler-rt / builtins / assembly.h
blob: 3f5e59b25442a91d2b21fbd331f84d4bfc635dd3 [file] [log] [blame]
Sandrine Bailleux3cd87d72018-10-09 11:12:55 +0200[diff] [blame^]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(name) .private_extern name
27#define LOCAL_LABEL(name) L_##name
28// tell linker it can break up file at label boundaries
29#define FILE_LEVEL_DIRECTIVE .subsections_via_symbols
30#define SYMBOL_IS_FUNC(name)
31#define CONST_SECTION .const
32
33#define NO_EXEC_STACK_DIRECTIVE
34
35#elif defined(__ELF__)
36
37#define HIDDEN(name) .hidden name
38#define LOCAL_LABEL(name) .L_##name
39#define FILE_LEVEL_DIRECTIVE
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#define CONST_SECTION .section .rodata
46
47#if defined(__GNU__) || defined(__FreeBSD__) || defined(__Fuchsia__) || \
48 defined(__linux__)
49#define NO_EXEC_STACK_DIRECTIVE .section .note.GNU-stack,"",%progbits
50#else
51#define NO_EXEC_STACK_DIRECTIVE
52#endif
53
54#else // !__APPLE__ && !__ELF__
55
56#define HIDDEN(name)
57#define LOCAL_LABEL(name) .L ## name
58#define FILE_LEVEL_DIRECTIVE
59#define SYMBOL_IS_FUNC(name) \
60 .def name SEPARATOR \
61 .scl 2 SEPARATOR \
62 .type 32 SEPARATOR \
63 .endef
64#define CONST_SECTION .section .rdata,"rd"
65
66#define NO_EXEC_STACK_DIRECTIVE
67
68#endif
69
70#if defined(__arm__)
71
72/*
73 * Determine actual [ARM][THUMB[1][2]] ISA using compiler predefined macros:
74 * - for '-mthumb -march=armv6' compiler defines '__thumb__'
75 * - for '-mthumb -march=armv7' compiler defines '__thumb__' and '__thumb2__'
76 */
77#if defined(__thumb2__) || defined(__thumb__)
78#define DEFINE_CODE_STATE .thumb SEPARATOR
79#define DECLARE_FUNC_ENCODING .thumb_func SEPARATOR
80#if defined(__thumb2__)
81#define USE_THUMB_2
82#define IT(cond) it cond
83#define ITT(cond) itt cond
84#define ITE(cond) ite cond
85#else
86#define USE_THUMB_1
87#define IT(cond)
88#define ITT(cond)
89#define ITE(cond)
90#endif // defined(__thumb__2)
91#else // !defined(__thumb2__) && !defined(__thumb__)
92#define DEFINE_CODE_STATE .arm SEPARATOR
93#define DECLARE_FUNC_ENCODING
94#define IT(cond)
95#define ITT(cond)
96#define ITE(cond)
97#endif
98
99#if defined(USE_THUMB_1) && defined(USE_THUMB_2)
100#error "USE_THUMB_1 and USE_THUMB_2 can't be defined together."
101#endif
102
103#if defined(__ARM_ARCH_4T__) || __ARM_ARCH >= 5
104#define ARM_HAS_BX
105#endif
106#if !defined(__ARM_FEATURE_CLZ) && !defined(USE_THUMB_1) && \
107 (__ARM_ARCH >= 6 || (__ARM_ARCH == 5 && !defined(__ARM_ARCH_5__)))
108#define __ARM_FEATURE_CLZ
109#endif
110
111#ifdef ARM_HAS_BX
112#define JMP(r) bx r
113#define JMPc(r, c) bx##c r
114#else
115#define JMP(r) mov pc, r
116#define JMPc(r, c) mov##c pc, r
117#endif
118
119// pop {pc} can't switch Thumb mode on ARMv4T
120#if __ARM_ARCH >= 5
121#define POP_PC() pop {pc}
122#else
123#define POP_PC() \
124 pop {ip}; \
125 JMP(ip)
126#endif
127
128#if defined(USE_THUMB_2)
129#define WIDE(op) op.w
130#else
131#define WIDE(op) op
132#endif
133#else // !defined(__arm)
134#define DECLARE_FUNC_ENCODING
135#define DEFINE_CODE_STATE
136#endif
137
138#define GLUE2(a, b) a##b
139#define GLUE(a, b) GLUE2(a, b)
140#define SYMBOL_NAME(name) GLUE(__USER_LABEL_PREFIX__, name)
141
142#ifdef VISIBILITY_HIDDEN
143#define DECLARE_SYMBOL_VISIBILITY(name) \
144 HIDDEN(SYMBOL_NAME(name)) SEPARATOR
145#else
146#define DECLARE_SYMBOL_VISIBILITY(name)
147#endif
148
149#define DEFINE_COMPILERRT_FUNCTION(name) \
150 DEFINE_CODE_STATE \
151 FILE_LEVEL_DIRECTIVE SEPARATOR \
152 .globl SYMBOL_NAME(name) SEPARATOR \
153 SYMBOL_IS_FUNC(SYMBOL_NAME(name)) SEPARATOR \
154 DECLARE_SYMBOL_VISIBILITY(name) \
155 DECLARE_FUNC_ENCODING \
156 SYMBOL_NAME(name):
157
158#define DEFINE_COMPILERRT_THUMB_FUNCTION(name) \
159 DEFINE_CODE_STATE \
160 FILE_LEVEL_DIRECTIVE SEPARATOR \
161 .globl SYMBOL_NAME(name) SEPARATOR \
162 SYMBOL_IS_FUNC(SYMBOL_NAME(name)) SEPARATOR \
163 DECLARE_SYMBOL_VISIBILITY(name) SEPARATOR \
164 .thumb_func SEPARATOR \
165 SYMBOL_NAME(name):
166
167#define DEFINE_COMPILERRT_PRIVATE_FUNCTION(name) \
168 DEFINE_CODE_STATE \
169 FILE_LEVEL_DIRECTIVE SEPARATOR \
170 .globl SYMBOL_NAME(name) SEPARATOR \
171 SYMBOL_IS_FUNC(SYMBOL_NAME(name)) SEPARATOR \
172 HIDDEN(SYMBOL_NAME(name)) SEPARATOR \
173 DECLARE_FUNC_ENCODING \
174 SYMBOL_NAME(name):
175
176#define DEFINE_COMPILERRT_PRIVATE_FUNCTION_UNMANGLED(name) \
177 DEFINE_CODE_STATE \
178 .globl name SEPARATOR \
179 SYMBOL_IS_FUNC(name) SEPARATOR \
180 HIDDEN(name) SEPARATOR \
181 DECLARE_FUNC_ENCODING \
182 name:
183
184#define DEFINE_COMPILERRT_FUNCTION_ALIAS(name, target) \
185 .globl SYMBOL_NAME(name) SEPARATOR \
186 SYMBOL_IS_FUNC(SYMBOL_NAME(name)) SEPARATOR \
187 DECLARE_SYMBOL_VISIBILITY(SYMBOL_NAME(name)) SEPARATOR \
188 .set SYMBOL_NAME(name), SYMBOL_NAME(target) SEPARATOR
189
190#if defined(__ARM_EABI__)
191#define DEFINE_AEABI_FUNCTION_ALIAS(aeabi_name, name) \
192 DEFINE_COMPILERRT_FUNCTION_ALIAS(aeabi_name, name)
193#else
194#define DEFINE_AEABI_FUNCTION_ALIAS(aeabi_name, name)
195#endif
196
197#ifdef __ELF__
198#define END_COMPILERRT_FUNCTION(name) \
199 .size SYMBOL_NAME(name), . - SYMBOL_NAME(name)
200#else
201#define END_COMPILERRT_FUNCTION(name)
202#endif
203
204#endif /* COMPILERRT_ASSEMBLY_H */