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/cvs/libcoro/coro.c
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Comparing libcoro/coro.c (file contents):
Revision 1.41 by root, Sat Nov 8 13:32:18 2008 UTC vs.
Revision 1.49 by root, Fri Apr 2 19:04:04 2010 UTC

1/* 1/*
2 * Copyright (c) 2001-2008 Marc Alexander Lehmann <schmorp@schmorp.de> 2 * Copyright (c) 2001-2009 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,
… …
78 78
79static coro_func coro_init_func; 79static coro_func coro_init_func;
80static void *coro_init_arg; 80static void *coro_init_arg;
81static coro_context *new_coro, *create_coro; 81static coro_context *new_coro, *create_coro;
82 82
83/* what we really want to detect here is wether we use a new-enough version of GAS */
84/* with dwarf debug info. instead, check for gcc 3, ELF and GNU/Linux and hope for the best */
85# if __GNUC__ >= 3 && __ELF__ && __linux__
86# define HAVE_CFI 1
87# endif
88
89static void 83static void
90coro_init (void) 84coro_init (void)
91{ 85{
92 volatile coro_func func = coro_init_func; 86 volatile coro_func func = coro_init_func;
93 volatile void *arg = coro_init_arg; 87 volatile void *arg = coro_init_arg;
… …
106 100
107/* trampoline signal handler */ 101/* trampoline signal handler */
108static void 102static void
109trampoline (int sig) 103trampoline (int sig)
110{ 104{
111 if (
112 #if _XOPEN_UNIX > 0
113 _setjmp (new_coro->env) 105 if (coro_setjmp (new_coro->env))
114 #else
115 sigsetjmp (new_coro->env, 0)
116 #endif
117 ) {
118 #if HAVE_CFI
119 asm (".cfi_startproc");
120 #endif
121 coro_init (); /* start it */ 106 coro_init (); /* start it */
122 #if HAVE_CFI
123 asm (".cfi_endproc");
124 #endif
125 }
126 else 107 else
127 trampoline_done = 1; 108 trampoline_done = 1;
128} 109}
129 110
130# endif 111# endif
… …
135 ".text\n" 116 ".text\n"
136 ".globl coro_transfer\n" 117 ".globl coro_transfer\n"
137 ".type coro_transfer, @function\n" 118 ".type coro_transfer, @function\n"
138 "coro_transfer:\n" 119 "coro_transfer:\n"
139 #if __amd64 120 #if __amd64
121 #if CORO_WIN_TIB
122 #define NUM_SAVED 6+3
123 "\tpush %fs:0x0\n"
124 "\tpush %fs:0x8\n"
125 "\tpush %fs:0xc\n"
126 #else
140 #define NUM_SAVED 6 127 #define NUM_SAVED 6
128 #endif
141 "\tpush %rbp\n" 129 "\tpush %rbp\n"
142 "\tpush %rbx\n" 130 "\tpush %rbx\n"
143 "\tpush %r12\n" 131 "\tpush %r12\n"
144 "\tpush %r13\n" 132 "\tpush %r13\n"
145 "\tpush %r14\n" 133 "\tpush %r14\n"
… …
150 "\tpop %r14\n" 138 "\tpop %r14\n"
151 "\tpop %r13\n" 139 "\tpop %r13\n"
152 "\tpop %r12\n" 140 "\tpop %r12\n"
153 "\tpop %rbx\n" 141 "\tpop %rbx\n"
154 "\tpop %rbp\n" 142 "\tpop %rbp\n"
143 #if CORO_WIN_TIB
144 "\tpop %fs:0xc\n"
145 "\tpop %fs:0x8\n"
146 "\tpop %fs:0x0\n"
147 #endif
155 #elif __i386 148 #elif __i386
149 #if CORO_WIN_TIB
150 #define NUM_SAVED 4+3
151 "\tpush %fs:0x0\n"
152 "\tpush %fs:0x4\n"
153 "\tpush %fs:0x8\n"
154 #else
156 #define NUM_SAVED 4 155 #define NUM_SAVED 4
156 #endif
157 "\tpush %ebp\n" 157 "\tpush %ebp\n"
158 "\tpush %ebx\n" 158 "\tpush %ebx\n"
159 "\tpush %esi\n" 159 "\tpush %esi\n"
160 "\tpush %edi\n" 160 "\tpush %edi\n"
161 "\tmov %esp, (%eax)\n" 161 "\tmov %esp, (%eax)\n"
162 "\tmov (%edx), %esp\n" 162 "\tmov (%edx), %esp\n"
163 "\tpop %edi\n" 163 "\tpop %edi\n"
164 "\tpop %esi\n" 164 "\tpop %esi\n"
165 "\tpop %ebx\n" 165 "\tpop %ebx\n"
166 "\tpop %ebp\n" 166 "\tpop %ebp\n"
167 #if CORO_WIN_TIB
168 "\tpop %fs:0x8\n"
169 "\tpop %fs:0x4\n"
170 "\tpop %fs:0x0\n"
171 #endif
167 #else 172 #else
168 #error unsupported architecture 173 #error unsupported architecture
169 #endif 174 #endif
170 "\tret\n" 175 "\tret\n"
171 ); 176 );
… …
241 sigaction (SIGUSR2, &osa, 0); 246 sigaction (SIGUSR2, &osa, 0);
242 sigprocmask (SIG_SETMASK, &osig, 0); 247 sigprocmask (SIG_SETMASK, &osig, 0);
243 248
244# elif CORO_LOSER 249# elif CORO_LOSER
245 250
246 setjmp (ctx->env); 251 coro_setjmp (ctx->env);
247 #if __CYGWIN__ 252 #if __CYGWIN__ && __i386
253 ctx->env[8] = (long) coro_init;
248 ctx->env[7] = (long)((char *)sptr + ssize) - sizeof (long); 254 ctx->env[7] = (long) ((char *)sptr + ssize) - sizeof (long);
249 ctx->env[8] = (long)coro_init; 255 #elif __CYGWIN__ && __x86_64
256 ctx->env[7] = (long) coro_init;
257 ctx->env[6] = (long) ((char *)sptr + ssize) - sizeof (long);
258 #elif defined(__MINGW32__)
259 ctx->env[5] = (long) coro_init;
260 ctx->env[4] = (long) ((char *)sptr + ssize) - sizeof (long);
250 #elif defined(_M_IX86) 261 #elif defined(_M_IX86)
251 ((_JUMP_BUFFER *)&ctx->env)->Eip = (long)coro_init; 262 ((_JUMP_BUFFER *)&ctx->env)->Eip = (long) coro_init;
252 ((_JUMP_BUFFER *)&ctx->env)->Esp = (long)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); 263 ((_JUMP_BUFFER *)&ctx->env)->Esp = (long) STACK_ADJUST_PTR (sptr, ssize) - sizeof (long);
253 #elif defined(_M_AMD64) 264 #elif defined(_M_AMD64)
254 ((_JUMP_BUFFER *)&ctx->env)->Rip = (__int64)coro_init; 265 ((_JUMP_BUFFER *)&ctx->env)->Rip = (__int64) coro_init;
255 ((_JUMP_BUFFER *)&ctx->env)->Rsp = (__int64)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); 266 ((_JUMP_BUFFER *)&ctx->env)->Rsp = (__int64) STACK_ADJUST_PTR (sptr, ssize) - sizeof (__int64);
256 #elif defined(_M_IA64) 267 #elif defined(_M_IA64)
257 ((_JUMP_BUFFER *)&ctx->env)->StIIP = (__int64)coro_init; 268 ((_JUMP_BUFFER *)&ctx->env)->StIIP = (__int64) coro_init;
258 ((_JUMP_BUFFER *)&ctx->env)->IntSp = (__int64)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); 269 ((_JUMP_BUFFER *)&ctx->env)->IntSp = (__int64) STACK_ADJUST_PTR (sptr, ssize) - sizeof (__int64);
259 #else 270 #else
260 #error "microsoft libc or architecture not supported" 271 #error "microsoft libc or architecture not supported"
261 #endif 272 #endif
262 273
263# elif CORO_LINUX 274# elif CORO_LINUX
264 275
265 _setjmp (ctx->env); 276 coro_setjmp (ctx->env);
266 #if __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (JB_PC) && defined (JB_SP) 277 #if __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (JB_PC) && defined (JB_SP)
267 ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init; 278 ctx->env[0].__jmpbuf[JB_PC] = (long) coro_init;
268 ctx->env[0].__jmpbuf[JB_SP] = (long)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); 279 ctx->env[0].__jmpbuf[JB_SP] = (long) STACK_ADJUST_PTR (sptr, ssize) - sizeof (long);
269 #elif __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (__mc68000__) 280 #elif __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (__mc68000__)
270 ctx->env[0].__jmpbuf[0].__aregs[0] = (long int)coro_init; 281 ctx->env[0].__jmpbuf[0].__aregs[0] = (long int)coro_init;
271 ctx->env[0].__jmpbuf[0].__sp = (int *)((char *)sptr + ssize) - sizeof (long); 282 ctx->env[0].__jmpbuf[0].__sp = (int *) ((char *)sptr + ssize) - sizeof (long);
272 #elif defined (__GNU_LIBRARY__) && defined (__i386__) 283 #elif defined (__GNU_LIBRARY__) && defined (__i386__)
273 ctx->env[0].__jmpbuf[0].__pc = (char *)coro_init; 284 ctx->env[0].__jmpbuf[0].__pc = (char *) coro_init;
274 ctx->env[0].__jmpbuf[0].__sp = (void *)((char *)sptr + ssize) - sizeof (long); 285 ctx->env[0].__jmpbuf[0].__sp = (void *) ((char *)sptr + ssize) - sizeof (long);
275 #elif defined (__GNU_LIBRARY__) && defined (__amd64__) 286 #elif defined (__GNU_LIBRARY__) && defined (__amd64__)
276 ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init; 287 ctx->env[0].__jmpbuf[JB_PC] = (long) coro_init;
277 ctx->env[0].__jmpbuf[0].__sp = (void *)((char *)sptr + ssize) - sizeof (long); 288 ctx->env[0].__jmpbuf[0].__sp = (void *) ((char *)sptr + ssize) - sizeof (long);
278 #else 289 #else
279 #error "linux libc or architecture not supported" 290 #error "linux libc or architecture not supported"
280 #endif 291 #endif
281 292
282# elif CORO_IRIX 293# elif CORO_IRIX
283 294
284 sigsetjmp (ctx->env, 0); 295 coro_setjmp (ctx->env, 0);
285 ctx->env[JB_PC] = (__uint64_t)coro_init; 296 ctx->env[JB_PC] = (__uint64_t)coro_init;
286 ctx->env[JB_SP] = (__uint64_t)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); 297 ctx->env[JB_SP] = (__uint64_t)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long);
287 298
288# elif CORO_ASM 299# elif CORO_ASM
289 300
290 ctx->sp = (void **)(ssize + (char *)sptr); 301 ctx->sp = (void **)(ssize + (char *)sptr);
291 *--ctx->sp = (void *)abort; /* needed for alignment only */ 302 *--ctx->sp = (void *)abort; /* needed for alignment only */
… …
353void 364void
354coro_transfer (coro_context *prev, coro_context *next) 365coro_transfer (coro_context *prev, coro_context *next)
355{ 366{
356 pthread_cond_signal (&next->cv); 367 pthread_cond_signal (&next->cv);
357 pthread_cond_wait (&prev->cv, &coro_mutex); 368 pthread_cond_wait (&prev->cv, &coro_mutex);
369#if __FreeBSD__ /* freebsd is of course broken and needs manual testcancel calls... yay... */
370 pthread_testcancel ();
371#endif
358} 372}
359 373
360void 374void
361coro_create (coro_context *ctx, coro_func coro, void *arg, void *sptr, long ssize) 375coro_create (coro_context *ctx, coro_func coro, void *arg, void *sptr, long ssize)
362{ 376{

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