1 | /* |
1 | /* |
2 | * Copyright (c) 2001-2009 Marc Alexander Lehmann <schmorp@schmorp.de> |
2 | * Copyright (c) 2001-2011 Marc Alexander Lehmann <schmorp@schmorp.de> |
3 | * |
3 | * |
4 | * Redistribution and use in source and binary forms, with or without modifica- |
4 | * Redistribution and use in source and binary forms, with or without modifica- |
5 | * tion, are permitted provided that the following conditions are met: |
5 | * tion, are permitted provided that the following conditions are met: |
6 | * |
6 | * |
7 | * 1. Redistributions of source code must retain the above copyright notice, |
7 | * 1. Redistributions of source code must retain the above copyright notice, |
… | |
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86 | volatile coro_func func = coro_init_func; |
86 | volatile coro_func func = coro_init_func; |
87 | volatile void *arg = coro_init_arg; |
87 | volatile void *arg = coro_init_arg; |
88 | |
88 | |
89 | coro_transfer (new_coro, create_coro); |
89 | coro_transfer (new_coro, create_coro); |
90 | |
90 | |
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91 | #if __linux && __amd64 |
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92 | /* we blindly assume on any __linux with __amd64 we have a new enough gas with .cfi_undefined support */ |
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93 | asm (".cfi_undefined rip"); |
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94 | #endif |
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95 | |
91 | func ((void *)arg); |
96 | func ((void *)arg); |
92 | |
97 | |
93 | /* the new coro returned. bad. just abort() for now */ |
98 | /* the new coro returned. bad. just abort() for now */ |
94 | abort (); |
99 | abort (); |
95 | } |
100 | } |
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110 | |
115 | |
111 | # endif |
116 | # endif |
112 | |
117 | |
113 | # if CORO_ASM |
118 | # if CORO_ASM |
114 | |
119 | |
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120 | #if _WIN32 |
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121 | #define CORO_WIN_TIB 1 |
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122 | #endif |
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123 | |
115 | asm ( |
124 | asm ( |
116 | ".text\n" |
125 | "\t.text\n" |
117 | ".globl coro_transfer\n" |
126 | "\t.globl coro_transfer\n" |
118 | ".type coro_transfer, @function\n" |
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119 | "coro_transfer:\n" |
127 | "coro_transfer:\n" |
120 | /* windows, of course, gives a shit on the amd64 ABI and uses different registers */ |
128 | /* windows, of course, gives a shit on the amd64 ABI and uses different registers */ |
121 | /* http://blogs.msdn.com/freik/archive/2005/03/17/398200.aspx */ |
129 | /* http://blogs.msdn.com/freik/archive/2005/03/17/398200.aspx */ |
122 | #if __amd64 |
130 | #if __amd64 |
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131 | #ifdef WIN32 |
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132 | /* TODO: xmm6..15 also would need to be saved. sigh. */ |
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133 | #define NUM_SAVED 8 |
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134 | "\tpushq %rsi\n" |
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135 | "\tpushq %rdi\n" |
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136 | "\tpushq %rbp\n" |
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137 | "\tpushq %rbx\n" |
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138 | "\tpushq %r12\n" |
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139 | "\tpushq %r13\n" |
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140 | "\tpushq %r14\n" |
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141 | "\tpushq %r15\n" |
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142 | #if CORO_WIN_TIB |
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143 | "\tpushq %fs:0x0\n" |
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144 | "\tpushq %fs:0x8\n" |
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145 | "\tpushq %fs:0xc\n" |
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146 | #endif |
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147 | "\tmovq %rsp, (%rcx)\n" |
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148 | "\tmovq (%rdx), %rsp\n" |
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149 | #if CORO_WIN_TIB |
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150 | "\tpopq %fs:0xc\n" |
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151 | "\tpopq %fs:0x8\n" |
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152 | "\tpopq %fs:0x0\n" |
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153 | #endif |
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154 | "\tpopq %r15\n" |
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155 | "\tpopq %r14\n" |
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156 | "\tpopq %r13\n" |
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157 | "\tpopq %r12\n" |
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158 | "\tpopq %rbx\n" |
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159 | "\tpopq %rbp\n" |
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160 | "\tpopq %rdi\n" |
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161 | "\tpopq %rsi\n" |
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162 | #else |
123 | #define NUM_SAVED 6 |
163 | #define NUM_SAVED 6 |
124 | "\tpush %rbp\n" |
164 | "\tpushq %rbp\n" |
125 | "\tpush %rbx\n" |
165 | "\tpushq %rbx\n" |
126 | "\tpush %r12\n" |
166 | "\tpushq %r12\n" |
127 | "\tpush %r13\n" |
167 | "\tpushq %r13\n" |
128 | "\tpush %r14\n" |
168 | "\tpushq %r14\n" |
129 | "\tpush %r15\n" |
169 | "\tpushq %r15\n" |
130 | #if CORO_WIN_TIB |
170 | "\tmovq %rsp, (%rdi)\n" |
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171 | "\tmovq (%rsi), %rsp\n" |
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172 | "\tpopq %r15\n" |
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173 | "\tpopq %r14\n" |
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174 | "\tpopq %r13\n" |
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175 | "\tpopq %r12\n" |
131 | "\tpush %gs:0x0\n" |
176 | "\tpopq %rbx\n" |
132 | "\tpush %gs:0x8\n" |
177 | "\tpopq %rbp\n" |
133 | "\tpush %gs:0xc\n" |
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134 | #endif |
178 | #endif |
135 | "\tmov %rsp, (%rdi)\n" |
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136 | "\tmov (%rsi), %rsp\n" |
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137 | #if CORO_WIN_TIB |
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138 | "\tpop %gs:0xc\n" |
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139 | "\tpop %gs:0x8\n" |
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140 | "\tpop %gs:0x0\n" |
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141 | #endif |
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142 | "\tpop %r15\n" |
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143 | "\tpop %r14\n" |
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144 | "\tpop %r13\n" |
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145 | "\tpop %r12\n" |
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146 | "\tpop %rbx\n" |
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147 | "\tpop %rbp\n" |
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148 | #elif __i386 |
179 | #elif __i386 |
149 | #define NUM_SAVED 4 |
180 | #define NUM_SAVED 4 |
150 | "\tpush %ebp\n" |
181 | "\tpushl %ebp\n" |
151 | "\tpush %ebx\n" |
182 | "\tpushl %ebx\n" |
152 | "\tpush %esi\n" |
183 | "\tpushl %esi\n" |
153 | "\tpush %edi\n" |
184 | "\tpushl %edi\n" |
154 | #if CORO_WIN_TIB |
185 | #if CORO_WIN_TIB |
155 | "\tpush %fs:0\n" |
186 | "\tpushl %fs:0\n" |
156 | "\tpush %fs:4\n" |
187 | "\tpushl %fs:4\n" |
157 | "\tpush %fs:8\n" |
188 | "\tpushl %fs:8\n" |
158 | #endif |
189 | #endif |
159 | "\tmov %esp, (%eax)\n" |
190 | "\tmovl %esp, (%eax)\n" |
160 | "\tmov (%edx), %esp\n" |
191 | "\tmovl (%edx), %esp\n" |
161 | #if CORO_WIN_TIB |
192 | #if CORO_WIN_TIB |
162 | "\tpop %fs:8\n" |
193 | "\tpopl %fs:8\n" |
163 | "\tpop %fs:4\n" |
194 | "\tpopl %fs:4\n" |
164 | "\tpop %fs:0\n" |
195 | "\tpopl %fs:0\n" |
165 | #endif |
196 | #endif |
166 | "\tpop %edi\n" |
197 | "\tpopl %edi\n" |
167 | "\tpop %esi\n" |
198 | "\tpopl %esi\n" |
168 | "\tpop %ebx\n" |
199 | "\tpopl %ebx\n" |
169 | "\tpop %ebp\n" |
200 | "\tpopl %ebp\n" |
170 | #else |
201 | #else |
171 | #error unsupported architecture |
202 | #error unsupported architecture |
172 | #endif |
203 | #endif |
173 | "\tret\n" |
204 | "\tret\n" |
174 | ); |
205 | ); |