ReactOS  0.4.15-dev-4853-g3a72a52
asm.h
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1 /*
2  * Inline assembly support
3  *
4  * Copyright 2019 Alexandre Julliard
5  *
6  * This library is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * This library is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with this library; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
19  */
20 
21 #ifndef __WINE_WINE_ASM_H
22 #define __WINE_WINE_ASM_H
23 
24 #if defined(__APPLE__) || (defined(_WIN32) && defined(__i386__))
25 # define __ASM_NAME(name) "_" name
26 #else
27 # define __ASM_NAME(name) name
28 #endif
29 
30 #if defined(_WIN32) && defined(__i386__)
31 # define __ASM_STDCALL(name,args) __ASM_NAME(name) "@" #args
32 #else
33 # define __ASM_STDCALL(name,args) __ASM_NAME(name)
34 #endif
35 
36 #if defined(__GCC_HAVE_DWARF2_CFI_ASM) || defined(__APPLE__)
37 # define __ASM_CFI(str) str
38 #else
39 # define __ASM_CFI(str)
40 #endif
41 
42 #ifdef __SEH__
43 # define __ASM_SEH(str) str
44 #else
45 # define __ASM_SEH(str)
46 #endif
47 
48 #ifdef _WIN32
49 # define __ASM_FUNC_TYPE(name) ".def " name "; .scl 2; .type 32; .endef"
50 #elif defined(__APPLE__)
51 # define __ASM_FUNC_TYPE(name) ""
52 #elif defined(__arm__) || defined(__arm64__)
53 # define __ASM_FUNC_TYPE(name) ".type " name ",%function"
54 #else
55 # define __ASM_FUNC_TYPE(name) ".type " name ",@function"
56 #endif
57 
58 /* ReactOS */
59 #if defined(_MSC_VER)
60 # define __ASM_DEFINE_FUNC(name,code)
61 #elif defined(__GNUC__)
62 # define __ASM_DEFINE_FUNC(name,code) \
63  asm(".text\n\t.align 4\n\t.globl " name "\n\t" __ASM_FUNC_TYPE(name) __ASM_SEH("\n\t.seh_proc " name) "\n" name ":\n\t" \
64  __ASM_CFI(".cfi_startproc\n\t") code __ASM_CFI("\n\t.cfi_endproc") __ASM_SEH("\n\t.seh_endproc") );
65 #else
66 # define __ASM_DEFINE_FUNC(name,code) void __asm_dummy_##__LINE__(void) { \
67  asm(".text\n\t.align 4\n\t.globl " name "\n\t" __ASM_FUNC_TYPE(name) __ASM_SEH("\n\t.seh_proc " name) "\n" name ":\n\t" \
68  __ASM_CFI(".cfi_startproc\n\t") code __ASM_CFI("\n\t.cfi_endproc") __ASM_SEH("\n\t.seh_endproc") ); }
69 #endif
70 
71 #define __ASM_GLOBAL_FUNC(name,code) __ASM_DEFINE_FUNC(__ASM_NAME(#name),code)
72 
73 #define __ASM_STDCALL_FUNC(name,args,code) __ASM_DEFINE_FUNC(__ASM_STDCALL(#name,args),code)
74 
75 /* fastcall support */
76 
77 #if defined(__i386__) && !defined(_WIN32)
78 
79 # define DEFINE_FASTCALL1_WRAPPER(func) \
80  __ASM_STDCALL_FUNC( __fastcall_ ## func, 4, \
81  "popl %eax\n\t" \
82  "pushl %ecx\n\t" \
83  "pushl %eax\n\t" \
84  "jmp " __ASM_STDCALL(#func,4) )
85 # define DEFINE_FASTCALL_WRAPPER(func,args) \
86  __ASM_STDCALL_FUNC( __fastcall_ ## func, args, \
87  "popl %eax\n\t" \
88  "pushl %edx\n\t" \
89  "pushl %ecx\n\t" \
90  "pushl %eax\n\t" \
91  "jmp " __ASM_STDCALL(#func,args) )
92 
93 #else /* __i386__ */
94 
95 # define DEFINE_FASTCALL1_WRAPPER(func) /* nothing */
96 # define DEFINE_FASTCALL_WRAPPER(func,args) /* nothing */
97 
98 #endif /* __i386__ */
99 
100 /* thiscall support */
101 
102 #ifdef _MSC_VER
103 #define __thiscall __stdcall
104 #endif
105 
106 #if defined(__i386__) && !defined(__MINGW32__)
107 
108 # ifdef _MSC_VER
109 
110 #ifdef __REACTOS__
111 # define DEFINE_THISCALL_WRAPPER(func,args) \
112  __declspec(naked) void __thiscall_##func(void) \
113  { \
114  __asm pop eax \
115  __asm push ecx \
116  __asm push eax \
117  __asm jmp func \
118  }
119 #else
120 # define DEFINE_THISCALL_WRAPPER(func,args) \
121  __declspec(naked) void __thiscall_##func(void) \
122  { __asm { \
123  pop eax \
124  push ecx \
125  push eax \
126  jmp func \
127  } }
128 #endif
129 # else /* _MSC_VER */
130 # define DEFINE_THISCALL_WRAPPER(func,args) \
131  extern void __thiscall_ ## func(void); \
132  __ASM_STDCALL_FUNC( __thiscall_ ## func, args, \
133  "popl %eax\n\t" \
134  "pushl %ecx\n\t" \
135  "pushl %eax\n\t" \
136  "jmp " __ASM_STDCALL(#func,args) )
137 # endif /* _MSC_VER */
138 
139 # define THISCALL(func) (void *)__thiscall_ ## func
140 # define THISCALL_NAME(func) __ASM_NAME("__thiscall_" #func)
141 
142 #else /* __i386__ */
143 
144 # define DEFINE_THISCALL_WRAPPER(func,args) /* nothing */
145 # define THISCALL(func) func
146 # define THISCALL_NAME(func) __ASM_NAME(#func)
147 
148 #endif /* __i386__ */
149 
150 #endif /* __WINE_WINE_ASM_H */