include/wine/asm.h

   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(__clang__) && defined(__GNUC__) && !defined(__SEH__))
  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 #if !defined(__GNUC__) && !defined(__clang__)
  59 # define __ASM_BLOCK_BEGIN(name) void __asm_dummy_##name(void) {
  60 # define __ASM_BLOCK_END         }
  61 #else
  62 # define __ASM_BLOCK_BEGIN(name)
  63 # define __ASM_BLOCK_END
  64 #endif
  65
  66 #define __ASM_DEFINE_FUNC(name,code)  \
  67     __ASM_BLOCK_BEGIN(__LINE__) \
  68     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" \
  69         __ASM_CFI(".cfi_startproc\n\t") code __ASM_CFI("\n\t.cfi_endproc") __ASM_SEH("\n\t.seh_endproc") ); \
  70     __ASM_BLOCK_END
  71
  72 #define __ASM_GLOBAL_FUNC(name,code) __ASM_DEFINE_FUNC(__ASM_NAME(#name),code)
  73
  74 #define __ASM_STDCALL_FUNC(name,args,code) __ASM_DEFINE_FUNC(__ASM_STDCALL(#name,args),code)
  75
  76 /* fastcall support */
  77
  78 #if defined(__i386__) && !defined(_WIN32)
  79
  80 # define DEFINE_FASTCALL1_WRAPPER(func) \
  81     __ASM_STDCALL_FUNC( __fastcall_ ## func, 4, \
  82                         "popl %eax\n\t"  \
  83                         "pushl %ecx\n\t" \
  84                         "pushl %eax\n\t" \
  85                         "jmp " __ASM_STDCALL(#func,4) )
  86 # define DEFINE_FASTCALL_WRAPPER(func,args) \
  87     __ASM_STDCALL_FUNC( __fastcall_ ## func, args, \
  88                         "popl %eax\n\t"  \
  89                         "pushl %edx\n\t" \
  90                         "pushl %ecx\n\t" \
  91                         "pushl %eax\n\t" \
  92                         "jmp " __ASM_STDCALL(#func,args) )
  93
  94 #else  /* __i386__ */
  95
  96 # define DEFINE_FASTCALL1_WRAPPER(func) /* nothing */
  97 # define DEFINE_FASTCALL_WRAPPER(func,args) /* nothing */
  98
  99 #endif  /* __i386__ */
 100
 101 /* thiscall support */
 102
 103 #if defined(__i386__) && !defined(__MINGW32__) && (!defined(_MSC_VER) || !defined(__clang__))
 104
 105 #define __ASM_USE_THISCALL_WRAPPER
 106 # ifdef _MSC_VER
 107 #  define DEFINE_THISCALL_WRAPPER(func,args) \
 108     __declspec(naked) void __thiscall_##func(void) \
 109     { __asm { \
 110         pop eax \
 111         push ecx \
 112         push eax \
 113         jmp func \
 114     } }
 115 # else  /* _MSC_VER */
 116 #  define DEFINE_THISCALL_WRAPPER(func,args) \
 117     extern void __thiscall_ ## func(void);  \
 118     __ASM_STDCALL_FUNC( __thiscall_ ## func, args, \
 119                        "popl %eax\n\t"  \
 120                        "pushl %ecx\n\t" \
 121                        "pushl %eax\n\t" \
 122                         "jmp " __ASM_STDCALL(#func,args) )
 123 # endif  /* _MSC_VER */
 124
 125 # define THISCALL(func) (void *)__thiscall_ ## func
 126 # define THISCALL_NAME(func) __ASM_NAME("__thiscall_" #func)
 127
 128 #else  /* __i386__ */
 129
 130 # define DEFINE_THISCALL_WRAPPER(func,args) /* nothing */
 131 # define THISCALL(func) func
 132 # define THISCALL_NAME(func) __ASM_NAME(#func)
 133
 134 #endif  /* __i386__ */
 135
 136 #if defined(__GNUC__) && !defined(_WIN32) && !defined(__APPLE__) && !defined(__ANDROID__)
 137 #define __ASM_OBSOLETE(func) __asm__( ".symver " #func "_obsolete," #func "@WINE_1.0" )
 138 #else
 139 #undef __ASM_OBSOLETE
 140 #endif
 141
 142 #endif  /* __WINE_WINE_ASM_H */