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, |
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78 | |
78 | |
79 | static coro_func coro_init_func; |
79 | static coro_func coro_init_func; |
80 | static void *coro_init_arg; |
80 | static void *coro_init_arg; |
81 | static coro_context *new_coro, *create_coro; |
81 | static 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 */ |
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84 | /* with dwarf debug info. instead, check for gcc 3, ELF and GNU/Linux and hope for the best */ |
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85 | # if __GNUC__ >= 3 && __ELF__ && __linux__ |
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86 | # define HAVE_CFI 1 |
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87 | # endif |
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88 | |
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89 | static void |
83 | static void |
90 | coro_init (void) |
84 | coro_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; |
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106 | |
100 | |
107 | /* trampoline signal handler */ |
101 | /* trampoline signal handler */ |
108 | static void |
102 | static void |
109 | trampoline (int sig) |
103 | trampoline (int sig) |
110 | { |
104 | { |
111 | if ( |
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112 | #if _XOPEN_UNIX > 0 |
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113 | _setjmp (new_coro->env) |
105 | if (coro_setjmp (new_coro->env)) |
114 | #else |
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115 | sigsetjmp (new_coro->env, 0) |
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116 | #endif |
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117 | ) { |
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118 | #if HAVE_CFI |
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119 | asm (".cfi_startproc"); |
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120 | #endif |
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121 | coro_init (); /* start it */ |
106 | coro_init (); /* start it */ |
122 | #if HAVE_CFI |
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123 | asm (".cfi_endproc"); |
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124 | #endif |
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125 | } |
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126 | else |
107 | else |
127 | trampoline_done = 1; |
108 | trampoline_done = 1; |
128 | } |
109 | } |
129 | |
110 | |
130 | # endif |
111 | # endif |
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241 | sigaction (SIGUSR2, &osa, 0); |
222 | sigaction (SIGUSR2, &osa, 0); |
242 | sigprocmask (SIG_SETMASK, &osig, 0); |
223 | sigprocmask (SIG_SETMASK, &osig, 0); |
243 | |
224 | |
244 | # elif CORO_LOSER |
225 | # elif CORO_LOSER |
245 | |
226 | |
246 | setjmp (ctx->env); |
227 | coro_setjmp (ctx->env); |
247 | #if __CYGWIN__ |
228 | #if __CYGWIN__ && __i386 |
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229 | ctx->env[8] = (long) coro_init; |
248 | ctx->env[7] = (long)((char *)sptr + ssize) - sizeof (long); |
230 | ctx->env[7] = (long) ((char *)sptr + ssize) - sizeof (long); |
249 | ctx->env[8] = (long)coro_init; |
231 | #elif __CYGWIN__ && __x86_64 |
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232 | ctx->env[7] = (long) coro_init; |
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233 | ctx->env[6] = (long) ((char *)sptr + ssize) - sizeof (long); |
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234 | #elif defined(__MINGW32__) |
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235 | ctx->env[5] = (long) coro_init; |
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236 | ctx->env[4] = (long) ((char *)sptr + ssize) - sizeof (long); |
250 | #elif defined(_M_IX86) |
237 | #elif defined(_M_IX86) |
251 | ((_JUMP_BUFFER *)&ctx->env)->Eip = (long)coro_init; |
238 | ((_JUMP_BUFFER *)&ctx->env)->Eip = (long) coro_init; |
252 | ((_JUMP_BUFFER *)&ctx->env)->Esp = (long)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); |
239 | ((_JUMP_BUFFER *)&ctx->env)->Esp = (long) STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); |
253 | #elif defined(_M_AMD64) |
240 | #elif defined(_M_AMD64) |
254 | ((_JUMP_BUFFER *)&ctx->env)->Rip = (__int64)coro_init; |
241 | ((_JUMP_BUFFER *)&ctx->env)->Rip = (__int64) coro_init; |
255 | ((_JUMP_BUFFER *)&ctx->env)->Rsp = (__int64)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); |
242 | ((_JUMP_BUFFER *)&ctx->env)->Rsp = (__int64) STACK_ADJUST_PTR (sptr, ssize) - sizeof (__int64); |
256 | #elif defined(_M_IA64) |
243 | #elif defined(_M_IA64) |
257 | ((_JUMP_BUFFER *)&ctx->env)->StIIP = (__int64)coro_init; |
244 | ((_JUMP_BUFFER *)&ctx->env)->StIIP = (__int64) coro_init; |
258 | ((_JUMP_BUFFER *)&ctx->env)->IntSp = (__int64)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); |
245 | ((_JUMP_BUFFER *)&ctx->env)->IntSp = (__int64) STACK_ADJUST_PTR (sptr, ssize) - sizeof (__int64); |
259 | #else |
246 | #else |
260 | #error "microsoft libc or architecture not supported" |
247 | #error "microsoft libc or architecture not supported" |
261 | #endif |
248 | #endif |
262 | |
249 | |
263 | # elif CORO_LINUX |
250 | # elif CORO_LINUX |
264 | |
251 | |
265 | _setjmp (ctx->env); |
252 | coro_setjmp (ctx->env); |
266 | #if __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (JB_PC) && defined (JB_SP) |
253 | #if __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (JB_PC) && defined (JB_SP) |
267 | ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init; |
254 | ctx->env[0].__jmpbuf[JB_PC] = (long) coro_init; |
268 | ctx->env[0].__jmpbuf[JB_SP] = (long)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); |
255 | ctx->env[0].__jmpbuf[JB_SP] = (long) STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); |
269 | #elif __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (__mc68000__) |
256 | #elif __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (__mc68000__) |
270 | ctx->env[0].__jmpbuf[0].__aregs[0] = (long int)coro_init; |
257 | ctx->env[0].__jmpbuf[0].__aregs[0] = (long int)coro_init; |
271 | ctx->env[0].__jmpbuf[0].__sp = (int *)((char *)sptr + ssize) - sizeof (long); |
258 | ctx->env[0].__jmpbuf[0].__sp = (int *) ((char *)sptr + ssize) - sizeof (long); |
272 | #elif defined (__GNU_LIBRARY__) && defined (__i386__) |
259 | #elif defined (__GNU_LIBRARY__) && defined (__i386__) |
273 | ctx->env[0].__jmpbuf[0].__pc = (char *)coro_init; |
260 | ctx->env[0].__jmpbuf[0].__pc = (char *) coro_init; |
274 | ctx->env[0].__jmpbuf[0].__sp = (void *)((char *)sptr + ssize) - sizeof (long); |
261 | ctx->env[0].__jmpbuf[0].__sp = (void *) ((char *)sptr + ssize) - sizeof (long); |
275 | #elif defined (__GNU_LIBRARY__) && defined (__amd64__) |
262 | #elif defined (__GNU_LIBRARY__) && defined (__amd64__) |
276 | ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init; |
263 | ctx->env[0].__jmpbuf[JB_PC] = (long) coro_init; |
277 | ctx->env[0].__jmpbuf[0].__sp = (void *)((char *)sptr + ssize) - sizeof (long); |
264 | ctx->env[0].__jmpbuf[0].__sp = (void *) ((char *)sptr + ssize) - sizeof (long); |
278 | #else |
265 | #else |
279 | #error "linux libc or architecture not supported" |
266 | #error "linux libc or architecture not supported" |
280 | #endif |
267 | #endif |
281 | |
268 | |
282 | # elif CORO_IRIX |
269 | # elif CORO_IRIX |
283 | |
270 | |
284 | sigsetjmp (ctx->env, 0); |
271 | coro_setjmp (ctx->env, 0); |
285 | ctx->env[JB_PC] = (__uint64_t)coro_init; |
272 | ctx->env[JB_PC] = (__uint64_t)coro_init; |
286 | ctx->env[JB_SP] = (__uint64_t)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); |
273 | ctx->env[JB_SP] = (__uint64_t)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); |
287 | |
274 | |
288 | # elif CORO_ASM |
275 | # elif CORO_ASM |
289 | |
276 | |
290 | ctx->sp = (void **)(ssize + (char *)sptr); |
277 | ctx->sp = (void **)(ssize + (char *)sptr); |
291 | *--ctx->sp = (void *)abort; /* needed for alignment only */ |
278 | *--ctx->sp = (void *)abort; /* needed for alignment only */ |
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353 | void |
340 | void |
354 | coro_transfer (coro_context *prev, coro_context *next) |
341 | coro_transfer (coro_context *prev, coro_context *next) |
355 | { |
342 | { |
356 | pthread_cond_signal (&next->cv); |
343 | pthread_cond_signal (&next->cv); |
357 | pthread_cond_wait (&prev->cv, &coro_mutex); |
344 | pthread_cond_wait (&prev->cv, &coro_mutex); |
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345 | #if __FreeBSD__ /* freebsd is of course broken and needs manual testcancel calls... yay... */ |
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346 | pthread_testcancel (); |
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347 | #endif |
358 | } |
348 | } |
359 | |
349 | |
360 | void |
350 | void |
361 | coro_create (coro_context *ctx, coro_func coro, void *arg, void *sptr, long ssize) |
351 | coro_create (coro_context *ctx, coro_func coro, void *arg, void *sptr, long ssize) |
362 | { |
352 | { |