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/cvs/libcoro/coro.c
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Comparing libcoro/coro.c (file contents):
Revision 1.51 by root, Fri Apr 2 19:18:01 2010 UTC vs.
Revision 1.59 by root, Mon Jun 13 08:38:16 2011 UTC

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,
… …
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
91#if __linux && __amd64
92 /* we blindly assume on any __linux with __amd64 we have a new enough gas with .cfi_undefined support */
93 asm (".cfi_undefined rip");
94#endif
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}
… …
115 asm ( 120 asm (
116 ".text\n" 121 ".text\n"
117 ".globl coro_transfer\n" 122 ".globl coro_transfer\n"
118 ".type coro_transfer, @function\n" 123 ".type coro_transfer, @function\n"
119 "coro_transfer:\n" 124 "coro_transfer:\n"
125 /* windows, of course, gives a shit on the amd64 ABI and uses different registers */
126 /* http://blogs.msdn.com/freik/archive/2005/03/17/398200.aspx */
120 #if __amd64 127 #if __amd64
128 #ifdef _WIN32
129 /* TODO: xmm6..15 also would need to be saved. sigh. */
130 #define NUM_SAVED 8
131 #undef CORO_WIN_TIB
132 "\tpushq %rsi\n"
133 "\tpushq %rdi\n"
134 "\tpushq %rbp\n"
135 "\tpushq %rbx\n"
136 "\tpushq %r12\n"
137 "\tpushq %r13\n"
138 "\tpushq %r14\n"
139 "\tpushq %r15\n"
140 "\tmovq %rsp, (%rcx)\n"
141 "\tmovq (%rdx), %rsp\n"
142 "\tpopq %r15\n"
143 "\tpopq %r14\n"
144 "\tpopq %r13\n"
145 "\tpopq %r12\n"
146 "\tpopq %rbx\n"
147 "\tpopq %rbp\n"
148 "\tpopq %rdi\n"
149 "\tpopq %rsi\n"
150 #else
121 #define NUM_SAVED 6 151 #define NUM_SAVED 6
122 "\tpush %rbp\n" 152 "\tpushq %rbp\n"
123 "\tpush %rbx\n" 153 "\tpushq %rbx\n"
124 "\tpush %r12\n" 154 "\tpushq %r12\n"
125 "\tpush %r13\n" 155 "\tpushq %r13\n"
126 "\tpush %r14\n" 156 "\tpushq %r14\n"
127 "\tpush %r15\n" 157 "\tpushq %r15\n"
128 #if CORO_WIN_TIB 158 "\tmovq %rsp, (%rdi)\n"
159 "\tmovq (%rsi), %rsp\n"
160 "\tpopq %r15\n"
161 "\tpopq %r14\n"
162 "\tpopq %r13\n"
163 "\tpopq %r12\n"
129 "\tpush %fs:0x0\n" 164 "\tpopq %rbx\n"
130 "\tpush %fs:0x8\n" 165 "\tpopq %rbp\n"
131 "\tpush %fs:0xc\n"
132 #endif 166 #endif
133 "\tmov %rsp, (%rdi)\n"
134 "\tmov (%rsi), %rsp\n"
135 #if CORO_WIN_TIB
136 "\tpop %fs:0xc\n"
137 "\tpop %fs:0x8\n"
138 "\tpop %fs:0x0\n"
139 #endif
140 "\tpop %r15\n"
141 "\tpop %r14\n"
142 "\tpop %r13\n"
143 "\tpop %r12\n"
144 "\tpop %rbx\n"
145 "\tpop %rbp\n"
146 #elif __i386 167 #elif __i386
147 #define NUM_SAVED 4 168 #define NUM_SAVED 4
148 "\tpush %ebp\n" 169 "\tpushl %ebp\n"
149 "\tpush %ebx\n" 170 "\tpushl %ebx\n"
150 "\tpush %esi\n" 171 "\tpushl %esi\n"
151 "\tpush %edi\n" 172 "\tpushl %edi\n"
152 #if CORO_WIN_TIB 173 #if CORO_WIN_TIB
153 "\tpush %fs:0\n" 174 "\tpushl %fs:0\n"
154 "\tpush %fs:4\n" 175 "\tpushl %fs:4\n"
155 "\tpush %fs:8\n" 176 "\tpushl %fs:8\n"
156 #endif 177 #endif
157 "\tmov %esp, (%eax)\n" 178 "\tmovl %esp, (%eax)\n"
158 "\tmov (%edx), %esp\n" 179 "\tmovl (%edx), %esp\n"
159 #if CORO_WIN_TIB 180 #if CORO_WIN_TIB
160 "\tpop %fs:8\n" 181 "\tpopl %fs:8\n"
161 "\tpop %fs:4\n" 182 "\tpopl %fs:4\n"
162 "\tpop %fs:0\n" 183 "\tpopl %fs:0\n"
163 #endif 184 #endif
164 "\tpop %edi\n" 185 "\tpopl %edi\n"
165 "\tpop %esi\n" 186 "\tpopl %esi\n"
166 "\tpop %ebx\n" 187 "\tpopl %ebx\n"
167 "\tpop %ebp\n" 188 "\tpopl %ebp\n"
168 #else 189 #else
169 #error unsupported architecture 190 #error unsupported architecture
170 #endif 191 #endif
171 "\tret\n" 192 "\tret\n"
172 ); 193 );
… …
208 perror ("sigaction"); 229 perror ("sigaction");
209 abort (); 230 abort ();
210 } 231 }
211 232
212 /* set the new stack */ 233 /* set the new stack */
213 nstk.ss_sp = STACK_ADJUST_PTR (sptr,ssize); /* yes, some platforms (IRIX) get this wrong. */ 234 nstk.ss_sp = STACK_ADJUST_PTR (sptr, ssize); /* yes, some platforms (IRIX) get this wrong. */
214 nstk.ss_size = STACK_ADJUST_SIZE (sptr,ssize); 235 nstk.ss_size = STACK_ADJUST_SIZE (sptr, ssize);
215 nstk.ss_flags = 0; 236 nstk.ss_flags = 0;
216 237
217 if (sigaltstack (&nstk, &ostk) < 0) 238 if (sigaltstack (&nstk, &ostk) < 0)
218 { 239 {
219 perror ("sigaltstack"); 240 perror ("sigaltstack");
… …
303 *--ctx->sp = (char *)sptr + ssize; /* StackBase */ 324 *--ctx->sp = (char *)sptr + ssize; /* StackBase */
304 *--ctx->sp = sptr; /* StackLimit */ 325 *--ctx->sp = sptr; /* StackLimit */
305 #endif 326 #endif
306 327
307 ctx->sp -= NUM_SAVED; 328 ctx->sp -= NUM_SAVED;
329 memset (ctx->sp, 0, sizeof (*ctx->sp) * NUM_SAVED);
308 330
309# elif CORO_UCONTEXT 331# elif CORO_UCONTEXT
310 332
311 getcontext (&(ctx->uc)); 333 getcontext (&(ctx->uc));
312 334
… …
400 args.arg = arg; 422 args.arg = arg;
401 args.self = ctx; 423 args.self = ctx;
402 args.main = &nctx; 424 args.main = &nctx;
403 425
404 pthread_attr_init (&attr); 426 pthread_attr_init (&attr);
427#if __UCLIBC__
428 /* exists, but is borked */
429 /*pthread_attr_setstacksize (&attr, (size_t)ssize);*/
430#else
405 pthread_attr_setstack (&attr, sptr, (size_t)ssize); 431 pthread_attr_setstack (&attr, sptr, (size_t)ssize);
432#endif
406 pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS); 433 pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS);
407 pthread_create (&ctx->id, &attr, coro_init, &args); 434 pthread_create (&ctx->id, &attr, coro_init, &args);
408 435
409 coro_transfer (args.main, args.self); 436 coro_transfer (args.main, args.self);
410 } 437 }

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