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 __GCC_HAVE_DWARF2_CFI_ASM && __amd64 |
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92 | asm (".cfi_undefined rip"); |
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93 | #endif |
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94 | |
91 | func ((void *)arg); |
95 | func ((void *)arg); |
92 | |
96 | |
93 | /* the new coro returned. bad. just abort() for now */ |
97 | /* the new coro returned. bad. just abort() for now */ |
94 | abort (); |
98 | abort (); |
95 | } |
99 | } |
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110 | |
114 | |
111 | # endif |
115 | # endif |
112 | |
116 | |
113 | # if CORO_ASM |
117 | # if CORO_ASM |
114 | |
118 | |
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119 | #if _WIN32 |
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120 | #define CORO_WIN_TIB 1 |
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121 | #endif |
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122 | |
115 | asm ( |
123 | asm ( |
116 | ".text\n" |
124 | "\t.text\n" |
117 | ".globl coro_transfer\n" |
125 | "\t.globl coro_transfer\n" |
118 | ".type coro_transfer, @function\n" |
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119 | "coro_transfer:\n" |
126 | "coro_transfer:\n" |
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127 | /* windows, of course, gives a shit on the amd64 ABI and uses different registers */ |
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128 | /* http://blogs.msdn.com/freik/archive/2005/03/17/398200.aspx */ |
120 | #if __amd64 |
129 | #if __amd64 |
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130 | #ifdef WIN32 |
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131 | /* TODO: xmm6..15 also would need to be saved. sigh. */ |
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132 | #define NUM_SAVED 8 |
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133 | "\tpushq %rsi\n" |
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134 | "\tpushq %rdi\n" |
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135 | "\tpushq %rbp\n" |
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136 | "\tpushq %rbx\n" |
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137 | "\tpushq %r12\n" |
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138 | "\tpushq %r13\n" |
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139 | "\tpushq %r14\n" |
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140 | "\tpushq %r15\n" |
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141 | #if CORO_WIN_TIB |
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142 | "\tpushq %fs:0x0\n" |
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143 | "\tpushq %fs:0x8\n" |
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144 | "\tpushq %fs:0xc\n" |
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145 | #endif |
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146 | "\tmovq %rsp, (%rcx)\n" |
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147 | "\tmovq (%rdx), %rsp\n" |
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148 | #if CORO_WIN_TIB |
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149 | "\tpopq %fs:0xc\n" |
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150 | "\tpopq %fs:0x8\n" |
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151 | "\tpopq %fs:0x0\n" |
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152 | #endif |
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153 | "\tpopq %r15\n" |
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154 | "\tpopq %r14\n" |
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155 | "\tpopq %r13\n" |
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156 | "\tpopq %r12\n" |
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157 | "\tpopq %rbx\n" |
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158 | "\tpopq %rbp\n" |
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159 | "\tpopq %rdi\n" |
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160 | "\tpopq %rsi\n" |
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161 | #else |
121 | #define NUM_SAVED 6 |
162 | #define NUM_SAVED 6 |
122 | "\tpush %rbp\n" |
163 | "\tpushq %rbp\n" |
123 | "\tpush %rbx\n" |
164 | "\tpushq %rbx\n" |
124 | "\tpush %r12\n" |
165 | "\tpushq %r12\n" |
125 | "\tpush %r13\n" |
166 | "\tpushq %r13\n" |
126 | "\tpush %r14\n" |
167 | "\tpushq %r14\n" |
127 | "\tpush %r15\n" |
168 | "\tpushq %r15\n" |
128 | "\tmov %rsp, (%rdi)\n" |
169 | "\tmovq %rsp, (%rdi)\n" |
129 | "\tmov (%rsi), %rsp\n" |
170 | "\tmovq (%rsi), %rsp\n" |
130 | "\tpop %r15\n" |
171 | "\tpopq %r15\n" |
131 | "\tpop %r14\n" |
172 | "\tpopq %r14\n" |
132 | "\tpop %r13\n" |
173 | "\tpopq %r13\n" |
133 | "\tpop %r12\n" |
174 | "\tpopq %r12\n" |
134 | "\tpop %rbx\n" |
175 | "\tpopq %rbx\n" |
135 | "\tpop %rbp\n" |
176 | "\tpopq %rbp\n" |
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177 | #endif |
136 | #elif __i386 |
178 | #elif __i386 |
137 | #define NUM_SAVED 4 |
179 | #define NUM_SAVED 4 |
138 | "\tpush %ebp\n" |
180 | "\tpushl %ebp\n" |
139 | "\tpush %ebx\n" |
181 | "\tpushl %ebx\n" |
140 | "\tpush %esi\n" |
182 | "\tpushl %esi\n" |
141 | "\tpush %edi\n" |
183 | "\tpushl %edi\n" |
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184 | #if CORO_WIN_TIB |
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185 | "\tpushl %fs:0\n" |
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186 | "\tpushl %fs:4\n" |
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187 | "\tpushl %fs:8\n" |
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188 | #endif |
142 | "\tmov %esp, (%eax)\n" |
189 | "\tmovl %esp, (%eax)\n" |
143 | "\tmov (%edx), %esp\n" |
190 | "\tmovl (%edx), %esp\n" |
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191 | #if CORO_WIN_TIB |
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192 | "\tpopl %fs:8\n" |
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193 | "\tpopl %fs:4\n" |
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194 | "\tpopl %fs:0\n" |
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195 | #endif |
144 | "\tpop %edi\n" |
196 | "\tpopl %edi\n" |
145 | "\tpop %esi\n" |
197 | "\tpopl %esi\n" |
146 | "\tpop %ebx\n" |
198 | "\tpopl %ebx\n" |
147 | "\tpop %ebp\n" |
199 | "\tpopl %ebp\n" |
148 | #else |
200 | #else |
149 | #error unsupported architecture |
201 | #error unsupported architecture |
150 | #endif |
202 | #endif |
151 | "\tret\n" |
203 | "\tret\n" |
152 | ); |
204 | ); |
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188 | perror ("sigaction"); |
240 | perror ("sigaction"); |
189 | abort (); |
241 | abort (); |
190 | } |
242 | } |
191 | |
243 | |
192 | /* set the new stack */ |
244 | /* set the new stack */ |
193 | nstk.ss_sp = STACK_ADJUST_PTR (sptr,ssize); /* yes, some platforms (IRIX) get this wrong. */ |
245 | nstk.ss_sp = STACK_ADJUST_PTR (sptr, ssize); /* yes, some platforms (IRIX) get this wrong. */ |
194 | nstk.ss_size = STACK_ADJUST_SIZE (sptr,ssize); |
246 | nstk.ss_size = STACK_ADJUST_SIZE (sptr, ssize); |
195 | nstk.ss_flags = 0; |
247 | nstk.ss_flags = 0; |
196 | |
248 | |
197 | if (sigaltstack (&nstk, &ostk) < 0) |
249 | if (sigaltstack (&nstk, &ostk) < 0) |
198 | { |
250 | { |
199 | perror ("sigaltstack"); |
251 | perror ("sigaltstack"); |
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275 | # elif CORO_ASM |
327 | # elif CORO_ASM |
276 | |
328 | |
277 | ctx->sp = (void **)(ssize + (char *)sptr); |
329 | ctx->sp = (void **)(ssize + (char *)sptr); |
278 | *--ctx->sp = (void *)abort; /* needed for alignment only */ |
330 | *--ctx->sp = (void *)abort; /* needed for alignment only */ |
279 | *--ctx->sp = (void *)coro_init; |
331 | *--ctx->sp = (void *)coro_init; |
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332 | |
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333 | #if CORO_WIN_TIB |
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334 | *--ctx->sp = 0; /* ExceptionList */ |
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335 | *--ctx->sp = (char *)sptr + ssize; /* StackBase */ |
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336 | *--ctx->sp = sptr; /* StackLimit */ |
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337 | #endif |
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338 | |
280 | ctx->sp -= NUM_SAVED; |
339 | ctx->sp -= NUM_SAVED; |
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340 | memset (ctx->sp, 0, sizeof (*ctx->sp) * NUM_SAVED); |
281 | |
341 | |
282 | # elif CORO_UCONTEXT |
342 | # elif CORO_UCONTEXT |
283 | |
343 | |
284 | getcontext (&(ctx->uc)); |
344 | getcontext (&(ctx->uc)); |
285 | |
345 | |
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373 | args.arg = arg; |
433 | args.arg = arg; |
374 | args.self = ctx; |
434 | args.self = ctx; |
375 | args.main = &nctx; |
435 | args.main = &nctx; |
376 | |
436 | |
377 | pthread_attr_init (&attr); |
437 | pthread_attr_init (&attr); |
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438 | #if __UCLIBC__ |
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439 | /* exists, but is borked */ |
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440 | /*pthread_attr_setstacksize (&attr, (size_t)ssize);*/ |
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441 | #else |
378 | pthread_attr_setstack (&attr, sptr, (size_t)ssize); |
442 | pthread_attr_setstack (&attr, sptr, (size_t)ssize); |
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443 | #endif |
379 | pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS); |
444 | pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS); |
380 | pthread_create (&ctx->id, &attr, coro_init, &args); |
445 | pthread_create (&ctx->id, &attr, coro_init, &args); |
381 | |
446 | |
382 | coro_transfer (args.main, args.self); |
447 | coro_transfer (args.main, args.self); |
383 | } |
448 | } |