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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74 | # include <stdio.h> |
74 | # include <stdio.h> |
75 | # include <signal.h> |
75 | # include <signal.h> |
76 | # include <unistd.h> |
76 | # include <unistd.h> |
77 | # endif |
77 | # endif |
78 | |
78 | |
79 | static volatile coro_func coro_init_func; |
79 | static coro_func coro_init_func; |
80 | static volatile void *coro_init_arg; |
80 | static void *coro_init_arg; |
81 | static volatile coro_context *new_coro, *create_coro; |
81 | static coro_context *new_coro, *create_coro; |
82 | |
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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 | |
82 | |
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; |
94 | |
88 | |
95 | coro_transfer ((coro_context *)new_coro, (coro_context *)create_coro); |
89 | coro_transfer (new_coro, create_coro); |
96 | |
90 | |
97 | func ((void *)arg); |
91 | func ((void *)arg); |
98 | |
92 | |
99 | /* the new coro returned. bad. just abort() for now */ |
93 | /* the new coro returned. bad. just abort() for now */ |
100 | abort (); |
94 | abort (); |
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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 | setjmp (new_coro->env) |
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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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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 |
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121 | #if CORO_WIN_TIB |
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122 | #define NUM_SAVED 6+3 |
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123 | "\tpush %fs:0x0\n" |
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124 | "\tpush %fs:0x8\n" |
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125 | "\tpush %fs:0xc\n" |
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126 | #else |
140 | #define NUM_SAVED 6 |
127 | #define NUM_SAVED 6 |
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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" |
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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" |
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143 | #if CORO_WIN_TIB |
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144 | "\tpop %fs:0xc\n" |
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145 | "\tpop %fs:0x8\n" |
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146 | "\tpop %fs:0x0\n" |
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147 | #endif |
155 | #elif __i386 |
148 | #elif __i386 |
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149 | #if CORO_WIN_TIB |
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150 | #define NUM_SAVED 4+3 |
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151 | "\tpush %fs:0x0\n" |
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152 | "\tpush %fs:0x4\n" |
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153 | "\tpush %fs:0x8\n" |
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154 | #else |
156 | #define NUM_SAVED 4 |
155 | #define NUM_SAVED 4 |
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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" |
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167 | #if CORO_WIN_TIB |
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168 | "\tpop %fs:0x8\n" |
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169 | "\tpop %fs:0x4\n" |
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170 | "\tpop %fs:0x0\n" |
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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 | ); |
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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 |
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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 |
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256 | ctx->env[7] = (long) coro_init; |
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257 | ctx->env[6] = (long) ((char *)sptr + ssize) - sizeof (long); |
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258 | #elif defined(__MINGW32__) |
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259 | ctx->env[5] = (long) coro_init; |
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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 | setjmp (ctx->env); |
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 = (volatile 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 */ |
292 | *--ctx->sp = (void *)coro_init; |
303 | *--ctx->sp = (void *)coro_init; |
293 | ctx->sp -= NUM_SAVED; |
304 | ctx->sp -= NUM_SAVED; |
294 | |
305 | |
295 | # elif CORO_UCONTEXT |
306 | # elif CORO_UCONTEXT |
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306 | # endif |
317 | # endif |
307 | |
318 | |
308 | coro_transfer (create_coro, new_coro); |
319 | coro_transfer (create_coro, new_coro); |
309 | } |
320 | } |
310 | |
321 | |
311 | #endif |
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312 | |
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313 | /*****************************************************************************/ |
322 | /*****************************************************************************/ |
314 | /* pthread backend */ |
323 | /* pthread backend */ |
315 | /*****************************************************************************/ |
324 | /*****************************************************************************/ |
316 | |
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317 | #if CORO_PTHREAD |
325 | #elif CORO_PTHREAD |
318 | |
326 | |
319 | /* this mutex will be locked by the running coroutine */ |
327 | /* this mutex will be locked by the running coroutine */ |
320 | pthread_mutex_t coro_mutex = PTHREAD_MUTEX_INITIALIZER; |
328 | pthread_mutex_t coro_mutex = PTHREAD_MUTEX_INITIALIZER; |
321 | |
329 | |
322 | struct coro_init_args |
330 | struct coro_init_args |
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356 | void |
364 | void |
357 | coro_transfer (coro_context *prev, coro_context *next) |
365 | coro_transfer (coro_context *prev, coro_context *next) |
358 | { |
366 | { |
359 | pthread_cond_signal (&next->cv); |
367 | pthread_cond_signal (&next->cv); |
360 | pthread_cond_wait (&prev->cv, &coro_mutex); |
368 | pthread_cond_wait (&prev->cv, &coro_mutex); |
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369 | #if __FreeBSD__ /* freebsd is of course broken and needs manual testcancel calls... yay... */ |
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370 | pthread_testcancel (); |
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371 | #endif |
361 | } |
372 | } |
362 | |
373 | |
363 | void |
374 | void |
364 | coro_create (coro_context *ctx, coro_func coro, void *arg, void *sptr, long ssize) |
375 | coro_create (coro_context *ctx, coro_func coro, void *arg, void *sptr, long ssize) |
365 | { |
376 | { |
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410 | } |
421 | } |
411 | |
422 | |
412 | pthread_cond_destroy (&ctx->cv); |
423 | pthread_cond_destroy (&ctx->cv); |
413 | } |
424 | } |
414 | |
425 | |
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426 | #else |
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427 | # error unsupported backend |
415 | #endif |
428 | #endif |
416 | |
429 | |