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Comparing libcoro/coro.c (file contents):
Revision 1.40 by root, Sat Nov 8 04:52:01 2008 UTC vs.
Revision 1.59 by root, Mon Jun 13 08:38:16 2011 UTC

1/* 1/*
2 * Copyright (c) 2001-2008 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,
… …
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;
94 88
95 coro_transfer (new_coro, create_coro); 89 coro_transfer (new_coro, create_coro);
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
96 95
97 func ((void *)arg); 96 func ((void *)arg);
98 97
99 /* the new coro returned. bad. just abort() for now */ 98 /* the new coro returned. bad. just abort() for now */
100 abort (); 99 abort ();
… …
106 105
107/* trampoline signal handler */ 106/* trampoline signal handler */
108static void 107static void
109trampoline (int sig) 108trampoline (int sig)
110{ 109{
111 if (
112 #if _XOPEN_UNIX > 0
113 _setjmp (new_coro->env) 110 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 */ 111 coro_init (); /* start it */
122 #if HAVE_CFI
123 asm (".cfi_endproc");
124 #endif
125 }
126 else 112 else
127 trampoline_done = 1; 113 trampoline_done = 1;
128} 114}
129 115
130# endif 116# endif
… …
134 asm ( 120 asm (
135 ".text\n" 121 ".text\n"
136 ".globl coro_transfer\n" 122 ".globl coro_transfer\n"
137 ".type coro_transfer, @function\n" 123 ".type coro_transfer, @function\n"
138 "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 */
139 #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
140 #define NUM_SAVED 6 151 #define NUM_SAVED 6
141 "\tpush %rbp\n" 152 "\tpushq %rbp\n"
142 "\tpush %rbx\n" 153 "\tpushq %rbx\n"
143 "\tpush %r12\n" 154 "\tpushq %r12\n"
144 "\tpush %r13\n" 155 "\tpushq %r13\n"
145 "\tpush %r14\n" 156 "\tpushq %r14\n"
146 "\tpush %r15\n" 157 "\tpushq %r15\n"
147 "\tmov %rsp, (%rdi)\n" 158 "\tmovq %rsp, (%rdi)\n"
148 "\tmov (%rsi), %rsp\n" 159 "\tmovq (%rsi), %rsp\n"
149 "\tpop %r15\n" 160 "\tpopq %r15\n"
150 "\tpop %r14\n" 161 "\tpopq %r14\n"
151 "\tpop %r13\n" 162 "\tpopq %r13\n"
152 "\tpop %r12\n" 163 "\tpopq %r12\n"
153 "\tpop %rbx\n" 164 "\tpopq %rbx\n"
154 "\tpop %rbp\n" 165 "\tpopq %rbp\n"
166 #endif
155 #elif __i386 167 #elif __i386
156 #define NUM_SAVED 4 168 #define NUM_SAVED 4
157 "\tpush %ebp\n" 169 "\tpushl %ebp\n"
158 "\tpush %ebx\n" 170 "\tpushl %ebx\n"
159 "\tpush %esi\n" 171 "\tpushl %esi\n"
160 "\tpush %edi\n" 172 "\tpushl %edi\n"
173 #if CORO_WIN_TIB
174 "\tpushl %fs:0\n"
175 "\tpushl %fs:4\n"
176 "\tpushl %fs:8\n"
177 #endif
161 "\tmov %esp, (%eax)\n" 178 "\tmovl %esp, (%eax)\n"
162 "\tmov (%edx), %esp\n" 179 "\tmovl (%edx), %esp\n"
180 #if CORO_WIN_TIB
181 "\tpopl %fs:8\n"
182 "\tpopl %fs:4\n"
183 "\tpopl %fs:0\n"
184 #endif
163 "\tpop %edi\n" 185 "\tpopl %edi\n"
164 "\tpop %esi\n" 186 "\tpopl %esi\n"
165 "\tpop %ebx\n" 187 "\tpopl %ebx\n"
166 "\tpop %ebp\n" 188 "\tpopl %ebp\n"
167 #else 189 #else
168 #error unsupported architecture 190 #error unsupported architecture
169 #endif 191 #endif
170 "\tret\n" 192 "\tret\n"
171 ); 193 );
… …
207 perror ("sigaction"); 229 perror ("sigaction");
208 abort (); 230 abort ();
209 } 231 }
210 232
211 /* set the new stack */ 233 /* set the new stack */
212 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. */
213 nstk.ss_size = STACK_ADJUST_SIZE (sptr,ssize); 235 nstk.ss_size = STACK_ADJUST_SIZE (sptr, ssize);
214 nstk.ss_flags = 0; 236 nstk.ss_flags = 0;
215 237
216 if (sigaltstack (&nstk, &ostk) < 0) 238 if (sigaltstack (&nstk, &ostk) < 0)
217 { 239 {
218 perror ("sigaltstack"); 240 perror ("sigaltstack");
… …
241 sigaction (SIGUSR2, &osa, 0); 263 sigaction (SIGUSR2, &osa, 0);
242 sigprocmask (SIG_SETMASK, &osig, 0); 264 sigprocmask (SIG_SETMASK, &osig, 0);
243 265
244# elif CORO_LOSER 266# elif CORO_LOSER
245 267
246 setjmp (ctx->env); 268 coro_setjmp (ctx->env);
247 #if __CYGWIN__ 269 #if __CYGWIN__ && __i386
270 ctx->env[8] = (long) coro_init;
248 ctx->env[7] = (long)((char *)sptr + ssize) - sizeof (long); 271 ctx->env[7] = (long) ((char *)sptr + ssize) - sizeof (long);
249 ctx->env[8] = (long)coro_init; 272 #elif __CYGWIN__ && __x86_64
273 ctx->env[7] = (long) coro_init;
274 ctx->env[6] = (long) ((char *)sptr + ssize) - sizeof (long);
275 #elif defined(__MINGW32__)
276 ctx->env[5] = (long) coro_init;
277 ctx->env[4] = (long) ((char *)sptr + ssize) - sizeof (long);
250 #elif defined(_M_IX86) 278 #elif defined(_M_IX86)
251 ((_JUMP_BUFFER *)&ctx->env)->Eip = (long)coro_init; 279 ((_JUMP_BUFFER *)&ctx->env)->Eip = (long) coro_init;
252 ((_JUMP_BUFFER *)&ctx->env)->Esp = (long)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); 280 ((_JUMP_BUFFER *)&ctx->env)->Esp = (long) STACK_ADJUST_PTR (sptr, ssize) - sizeof (long);
253 #elif defined(_M_AMD64) 281 #elif defined(_M_AMD64)
254 ((_JUMP_BUFFER *)&ctx->env)->Rip = (__int64)coro_init; 282 ((_JUMP_BUFFER *)&ctx->env)->Rip = (__int64) coro_init;
255 ((_JUMP_BUFFER *)&ctx->env)->Rsp = (__int64)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); 283 ((_JUMP_BUFFER *)&ctx->env)->Rsp = (__int64) STACK_ADJUST_PTR (sptr, ssize) - sizeof (__int64);
256 #elif defined(_M_IA64) 284 #elif defined(_M_IA64)
257 ((_JUMP_BUFFER *)&ctx->env)->StIIP = (__int64)coro_init; 285 ((_JUMP_BUFFER *)&ctx->env)->StIIP = (__int64) coro_init;
258 ((_JUMP_BUFFER *)&ctx->env)->IntSp = (__int64)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); 286 ((_JUMP_BUFFER *)&ctx->env)->IntSp = (__int64) STACK_ADJUST_PTR (sptr, ssize) - sizeof (__int64);
259 #else 287 #else
260 #error "microsoft libc or architecture not supported" 288 #error "microsoft libc or architecture not supported"
261 #endif 289 #endif
262 290
263# elif CORO_LINUX 291# elif CORO_LINUX
264 292
265 _setjmp (ctx->env); 293 coro_setjmp (ctx->env);
266 #if __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (JB_PC) && defined (JB_SP) 294 #if __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (JB_PC) && defined (JB_SP)
267 ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init; 295 ctx->env[0].__jmpbuf[JB_PC] = (long) coro_init;
268 ctx->env[0].__jmpbuf[JB_SP] = (long)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); 296 ctx->env[0].__jmpbuf[JB_SP] = (long) STACK_ADJUST_PTR (sptr, ssize) - sizeof (long);
269 #elif __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (__mc68000__) 297 #elif __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (__mc68000__)
270 ctx->env[0].__jmpbuf[0].__aregs[0] = (long int)coro_init; 298 ctx->env[0].__jmpbuf[0].__aregs[0] = (long int)coro_init;
271 ctx->env[0].__jmpbuf[0].__sp = (int *)((char *)sptr + ssize) - sizeof (long); 299 ctx->env[0].__jmpbuf[0].__sp = (int *) ((char *)sptr + ssize) - sizeof (long);
272 #elif defined (__GNU_LIBRARY__) && defined (__i386__) 300 #elif defined (__GNU_LIBRARY__) && defined (__i386__)
273 ctx->env[0].__jmpbuf[0].__pc = (char *)coro_init; 301 ctx->env[0].__jmpbuf[0].__pc = (char *) coro_init;
274 ctx->env[0].__jmpbuf[0].__sp = (void *)((char *)sptr + ssize) - sizeof (long); 302 ctx->env[0].__jmpbuf[0].__sp = (void *) ((char *)sptr + ssize) - sizeof (long);
275 #elif defined (__GNU_LIBRARY__) && defined (__amd64__) 303 #elif defined (__GNU_LIBRARY__) && defined (__amd64__)
276 ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init; 304 ctx->env[0].__jmpbuf[JB_PC] = (long) coro_init;
277 ctx->env[0].__jmpbuf[0].__sp = (void *)((char *)sptr + ssize) - sizeof (long); 305 ctx->env[0].__jmpbuf[0].__sp = (void *) ((char *)sptr + ssize) - sizeof (long);
278 #else 306 #else
279 #error "linux libc or architecture not supported" 307 #error "linux libc or architecture not supported"
280 #endif 308 #endif
281 309
282# elif CORO_IRIX 310# elif CORO_IRIX
283 311
284 sigsetjmp (ctx->env, 0); 312 coro_setjmp (ctx->env, 0);
285 ctx->env[JB_PC] = (__uint64_t)coro_init; 313 ctx->env[JB_PC] = (__uint64_t)coro_init;
286 ctx->env[JB_SP] = (__uint64_t)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); 314 ctx->env[JB_SP] = (__uint64_t)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long);
287 315
288# elif CORO_ASM 316# elif CORO_ASM
289 317
290 ctx->sp = (volatile void **)(ssize + (char *)sptr); 318 ctx->sp = (void **)(ssize + (char *)sptr);
291 *--ctx->sp = (void *)abort; /* needed for alignment only */ 319 *--ctx->sp = (void *)abort; /* needed for alignment only */
292 *--ctx->sp = (void *)coro_init; 320 *--ctx->sp = (void *)coro_init;
321
322 #if CORO_WIN_TIB
323 *--ctx->sp = 0; /* ExceptionList */
324 *--ctx->sp = (char *)sptr + ssize; /* StackBase */
325 *--ctx->sp = sptr; /* StackLimit */
326 #endif
327
293 ctx->sp -= NUM_SAVED; 328 ctx->sp -= NUM_SAVED;
329 memset (ctx->sp, 0, sizeof (*ctx->sp) * NUM_SAVED);
294 330
295# elif CORO_UCONTEXT 331# elif CORO_UCONTEXT
296 332
297 getcontext (&(ctx->uc)); 333 getcontext (&(ctx->uc));
298 334
… …
353void 389void
354coro_transfer (coro_context *prev, coro_context *next) 390coro_transfer (coro_context *prev, coro_context *next)
355{ 391{
356 pthread_cond_signal (&next->cv); 392 pthread_cond_signal (&next->cv);
357 pthread_cond_wait (&prev->cv, &coro_mutex); 393 pthread_cond_wait (&prev->cv, &coro_mutex);
394#if __FreeBSD__ /* freebsd is of course broken and needs manual testcancel calls... yay... */
395 pthread_testcancel ();
396#endif
358} 397}
359 398
360void 399void
361coro_create (coro_context *ctx, coro_func coro, void *arg, void *sptr, long ssize) 400coro_create (coro_context *ctx, coro_func coro, void *arg, void *sptr, long ssize)
362{ 401{
… …
383 args.arg = arg; 422 args.arg = arg;
384 args.self = ctx; 423 args.self = ctx;
385 args.main = &nctx; 424 args.main = &nctx;
386 425
387 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
388 pthread_attr_setstack (&attr, sptr, (size_t)ssize); 431 pthread_attr_setstack (&attr, sptr, (size_t)ssize);
432#endif
389 pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS); 433 pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS);
390 pthread_create (&ctx->id, &attr, coro_init, &args); 434 pthread_create (&ctx->id, &attr, coro_init, &args);
391 435
392 coro_transfer (args.main, args.self); 436 coro_transfer (args.main, args.self);
393 } 437 }

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