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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 1.61 by root, Sun Jul 3 10:51:42 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 __GCC_HAVE_DWARF2_CFI_ASM && __amd64
92 asm (".cfi_undefined rip");
93#endif
96 94
97 func ((void *)arg); 95 func ((void *)arg);
98 96
99 /* the new coro returned. bad. just abort() for now */ 97 /* the new coro returned. bad. just abort() for now */
100 abort (); 98 abort ();
… …
106 104
107/* trampoline signal handler */ 105/* trampoline signal handler */
108static void 106static void
109trampoline (int sig) 107trampoline (int sig)
110{ 108{
111 if (
112 #if _XOPEN_UNIX > 0
113 _setjmp (new_coro->env) 109 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 */ 110 coro_init (); /* start it */
122 #if HAVE_CFI
123 asm (".cfi_endproc");
124 #endif
125 }
126 else 111 else
127 trampoline_done = 1; 112 trampoline_done = 1;
128} 113}
129 114
130# endif 115# endif
131 116
132# if CORO_ASM 117# if CORO_ASM
133 118
119 #if _WIN32
120 #define CORO_WIN_TIB 1
121 #endif
122
134 asm ( 123 asm (
135 ".text\n" 124 "\t.text\n"
136 ".globl coro_transfer\n" 125 "\t.globl coro_transfer\n"
137 ".type coro_transfer, @function\n"
138 "coro_transfer:\n" 126 "coro_transfer:\n"
127 /* windows, of course, gives a shit on the amd64 ABI and uses different registers */
128 /* http://blogs.msdn.com/freik/archive/2005/03/17/398200.aspx */
139 #if __amd64 129 #if __amd64
130 #ifdef WIN32
131 /* TODO: xmm6..15 also would need to be saved. sigh. */
132 #define NUM_SAVED 8
133 "\tpushq %rsi\n"
134 "\tpushq %rdi\n"
135 "\tpushq %rbp\n"
136 "\tpushq %rbx\n"
137 "\tpushq %r12\n"
138 "\tpushq %r13\n"
139 "\tpushq %r14\n"
140 "\tpushq %r15\n"
141 #if CORO_WIN_TIB
142 "\tpushq %fs:0x0\n"
143 "\tpushq %fs:0x8\n"
144 "\tpushq %fs:0xc\n"
145 #endif
146 "\tmovq %rsp, (%rcx)\n"
147 "\tmovq (%rdx), %rsp\n"
148 #if CORO_WIN_TIB
149 "\tpopq %fs:0xc\n"
150 "\tpopq %fs:0x8\n"
151 "\tpopq %fs:0x0\n"
152 #endif
153 "\tpopq %r15\n"
154 "\tpopq %r14\n"
155 "\tpopq %r13\n"
156 "\tpopq %r12\n"
157 "\tpopq %rbx\n"
158 "\tpopq %rbp\n"
159 "\tpopq %rdi\n"
160 "\tpopq %rsi\n"
161 #else
140 #define NUM_SAVED 6 162 #define NUM_SAVED 6
141 "\tpush %rbp\n" 163 "\tpushq %rbp\n"
142 "\tpush %rbx\n" 164 "\tpushq %rbx\n"
143 "\tpush %r12\n" 165 "\tpushq %r12\n"
144 "\tpush %r13\n" 166 "\tpushq %r13\n"
145 "\tpush %r14\n" 167 "\tpushq %r14\n"
146 "\tpush %r15\n" 168 "\tpushq %r15\n"
147 "\tmov %rsp, (%rdi)\n" 169 "\tmovq %rsp, (%rdi)\n"
148 "\tmov (%rsi), %rsp\n" 170 "\tmovq (%rsi), %rsp\n"
149 "\tpop %r15\n" 171 "\tpopq %r15\n"
150 "\tpop %r14\n" 172 "\tpopq %r14\n"
151 "\tpop %r13\n" 173 "\tpopq %r13\n"
152 "\tpop %r12\n" 174 "\tpopq %r12\n"
153 "\tpop %rbx\n" 175 "\tpopq %rbx\n"
154 "\tpop %rbp\n" 176 "\tpopq %rbp\n"
177 #endif
155 #elif __i386 178 #elif __i386
156 #define NUM_SAVED 4 179 #define NUM_SAVED 4
157 "\tpush %ebp\n" 180 "\tpushl %ebp\n"
158 "\tpush %ebx\n" 181 "\tpushl %ebx\n"
159 "\tpush %esi\n" 182 "\tpushl %esi\n"
160 "\tpush %edi\n" 183 "\tpushl %edi\n"
184 #if CORO_WIN_TIB
185 "\tpushl %fs:0\n"
186 "\tpushl %fs:4\n"
187 "\tpushl %fs:8\n"
188 #endif
161 "\tmov %esp, (%eax)\n" 189 "\tmovl %esp, (%eax)\n"
162 "\tmov (%edx), %esp\n" 190 "\tmovl (%edx), %esp\n"
191 #if CORO_WIN_TIB
192 "\tpopl %fs:8\n"
193 "\tpopl %fs:4\n"
194 "\tpopl %fs:0\n"
195 #endif
163 "\tpop %edi\n" 196 "\tpopl %edi\n"
164 "\tpop %esi\n" 197 "\tpopl %esi\n"
165 "\tpop %ebx\n" 198 "\tpopl %ebx\n"
166 "\tpop %ebp\n" 199 "\tpopl %ebp\n"
167 #else 200 #else
168 #error unsupported architecture 201 #error unsupported architecture
169 #endif 202 #endif
170 "\tret\n" 203 "\tret\n"
171 ); 204 );
… …
207 perror ("sigaction"); 240 perror ("sigaction");
208 abort (); 241 abort ();
209 } 242 }
210 243
211 /* set the new stack */ 244 /* set the new stack */
212 nstk.ss_sp = STACK_ADJUST_PTR (sptr,ssize); /* yes, some platforms (IRIX) get this wrong. */ 245 nstk.ss_sp = STACK_ADJUST_PTR (sptr, ssize); /* yes, some platforms (IRIX) get this wrong. */
213 nstk.ss_size = STACK_ADJUST_SIZE (sptr,ssize); 246 nstk.ss_size = STACK_ADJUST_SIZE (sptr, ssize);
214 nstk.ss_flags = 0; 247 nstk.ss_flags = 0;
215 248
216 if (sigaltstack (&nstk, &ostk) < 0) 249 if (sigaltstack (&nstk, &ostk) < 0)
217 { 250 {
218 perror ("sigaltstack"); 251 perror ("sigaltstack");
… …
241 sigaction (SIGUSR2, &osa, 0); 274 sigaction (SIGUSR2, &osa, 0);
242 sigprocmask (SIG_SETMASK, &osig, 0); 275 sigprocmask (SIG_SETMASK, &osig, 0);
243 276
244# elif CORO_LOSER 277# elif CORO_LOSER
245 278
246 setjmp (ctx->env); 279 coro_setjmp (ctx->env);
247 #if __CYGWIN__ 280 #if __CYGWIN__ && __i386
281 ctx->env[8] = (long) coro_init;
248 ctx->env[7] = (long)((char *)sptr + ssize) - sizeof (long); 282 ctx->env[7] = (long) ((char *)sptr + ssize) - sizeof (long);
249 ctx->env[8] = (long)coro_init; 283 #elif __CYGWIN__ && __x86_64
284 ctx->env[7] = (long) coro_init;
285 ctx->env[6] = (long) ((char *)sptr + ssize) - sizeof (long);
286 #elif defined(__MINGW32__)
287 ctx->env[5] = (long) coro_init;
288 ctx->env[4] = (long) ((char *)sptr + ssize) - sizeof (long);
250 #elif defined(_M_IX86) 289 #elif defined(_M_IX86)
251 ((_JUMP_BUFFER *)&ctx->env)->Eip = (long)coro_init; 290 ((_JUMP_BUFFER *)&ctx->env)->Eip = (long) coro_init;
252 ((_JUMP_BUFFER *)&ctx->env)->Esp = (long)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); 291 ((_JUMP_BUFFER *)&ctx->env)->Esp = (long) STACK_ADJUST_PTR (sptr, ssize) - sizeof (long);
253 #elif defined(_M_AMD64) 292 #elif defined(_M_AMD64)
254 ((_JUMP_BUFFER *)&ctx->env)->Rip = (__int64)coro_init; 293 ((_JUMP_BUFFER *)&ctx->env)->Rip = (__int64) coro_init;
255 ((_JUMP_BUFFER *)&ctx->env)->Rsp = (__int64)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); 294 ((_JUMP_BUFFER *)&ctx->env)->Rsp = (__int64) STACK_ADJUST_PTR (sptr, ssize) - sizeof (__int64);
256 #elif defined(_M_IA64) 295 #elif defined(_M_IA64)
257 ((_JUMP_BUFFER *)&ctx->env)->StIIP = (__int64)coro_init; 296 ((_JUMP_BUFFER *)&ctx->env)->StIIP = (__int64) coro_init;
258 ((_JUMP_BUFFER *)&ctx->env)->IntSp = (__int64)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); 297 ((_JUMP_BUFFER *)&ctx->env)->IntSp = (__int64) STACK_ADJUST_PTR (sptr, ssize) - sizeof (__int64);
259 #else 298 #else
260 #error "microsoft libc or architecture not supported" 299 #error "microsoft libc or architecture not supported"
261 #endif 300 #endif
262 301
263# elif CORO_LINUX 302# elif CORO_LINUX
264 303
265 _setjmp (ctx->env); 304 coro_setjmp (ctx->env);
266 #if __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (JB_PC) && defined (JB_SP) 305 #if __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (JB_PC) && defined (JB_SP)
267 ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init; 306 ctx->env[0].__jmpbuf[JB_PC] = (long) coro_init;
268 ctx->env[0].__jmpbuf[JB_SP] = (long)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); 307 ctx->env[0].__jmpbuf[JB_SP] = (long) STACK_ADJUST_PTR (sptr, ssize) - sizeof (long);
269 #elif __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (__mc68000__) 308 #elif __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (__mc68000__)
270 ctx->env[0].__jmpbuf[0].__aregs[0] = (long int)coro_init; 309 ctx->env[0].__jmpbuf[0].__aregs[0] = (long int)coro_init;
271 ctx->env[0].__jmpbuf[0].__sp = (int *)((char *)sptr + ssize) - sizeof (long); 310 ctx->env[0].__jmpbuf[0].__sp = (int *) ((char *)sptr + ssize) - sizeof (long);
272 #elif defined (__GNU_LIBRARY__) && defined (__i386__) 311 #elif defined (__GNU_LIBRARY__) && defined (__i386__)
273 ctx->env[0].__jmpbuf[0].__pc = (char *)coro_init; 312 ctx->env[0].__jmpbuf[0].__pc = (char *) coro_init;
274 ctx->env[0].__jmpbuf[0].__sp = (void *)((char *)sptr + ssize) - sizeof (long); 313 ctx->env[0].__jmpbuf[0].__sp = (void *) ((char *)sptr + ssize) - sizeof (long);
275 #elif defined (__GNU_LIBRARY__) && defined (__amd64__) 314 #elif defined (__GNU_LIBRARY__) && defined (__amd64__)
276 ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init; 315 ctx->env[0].__jmpbuf[JB_PC] = (long) coro_init;
277 ctx->env[0].__jmpbuf[0].__sp = (void *)((char *)sptr + ssize) - sizeof (long); 316 ctx->env[0].__jmpbuf[0].__sp = (void *) ((char *)sptr + ssize) - sizeof (long);
278 #else 317 #else
279 #error "linux libc or architecture not supported" 318 #error "linux libc or architecture not supported"
280 #endif 319 #endif
281 320
282# elif CORO_IRIX 321# elif CORO_IRIX
283 322
284 sigsetjmp (ctx->env, 0); 323 coro_setjmp (ctx->env, 0);
285 ctx->env[JB_PC] = (__uint64_t)coro_init; 324 ctx->env[JB_PC] = (__uint64_t)coro_init;
286 ctx->env[JB_SP] = (__uint64_t)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); 325 ctx->env[JB_SP] = (__uint64_t)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long);
287 326
288# elif CORO_ASM 327# elif CORO_ASM
289 328
290 ctx->sp = (volatile void **)(ssize + (char *)sptr); 329 ctx->sp = (void **)(ssize + (char *)sptr);
291 *--ctx->sp = (void *)abort; /* needed for alignment only */ 330 *--ctx->sp = (void *)abort; /* needed for alignment only */
292 *--ctx->sp = (void *)coro_init; 331 *--ctx->sp = (void *)coro_init;
332
333 #if CORO_WIN_TIB
334 *--ctx->sp = 0; /* ExceptionList */
335 *--ctx->sp = (char *)sptr + ssize; /* StackBase */
336 *--ctx->sp = sptr; /* StackLimit */
337 #endif
338
293 ctx->sp -= NUM_SAVED; 339 ctx->sp -= NUM_SAVED;
340 memset (ctx->sp, 0, sizeof (*ctx->sp) * NUM_SAVED);
294 341
295# elif CORO_UCONTEXT 342# elif CORO_UCONTEXT
296 343
297 getcontext (&(ctx->uc)); 344 getcontext (&(ctx->uc));
298 345
… …
353void 400void
354coro_transfer (coro_context *prev, coro_context *next) 401coro_transfer (coro_context *prev, coro_context *next)
355{ 402{
356 pthread_cond_signal (&next->cv); 403 pthread_cond_signal (&next->cv);
357 pthread_cond_wait (&prev->cv, &coro_mutex); 404 pthread_cond_wait (&prev->cv, &coro_mutex);
405#if __FreeBSD__ /* freebsd is of course broken and needs manual testcancel calls... yay... */
406 pthread_testcancel ();
407#endif
358} 408}
359 409
360void 410void
361coro_create (coro_context *ctx, coro_func coro, void *arg, void *sptr, long ssize) 411coro_create (coro_context *ctx, coro_func coro, void *arg, void *sptr, long ssize)
362{ 412{
… …
383 args.arg = arg; 433 args.arg = arg;
384 args.self = ctx; 434 args.self = ctx;
385 args.main = &nctx; 435 args.main = &nctx;
386 436
387 pthread_attr_init (&attr); 437 pthread_attr_init (&attr);
438#if __UCLIBC__
439 /* exists, but is borked */
440 /*pthread_attr_setstacksize (&attr, (size_t)ssize);*/
441#else
388 pthread_attr_setstack (&attr, sptr, (size_t)ssize); 442 pthread_attr_setstack (&attr, sptr, (size_t)ssize);
443#endif
389 pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS); 444 pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS);
390 pthread_create (&ctx->id, &attr, coro_init, &args); 445 pthread_create (&ctx->id, &attr, coro_init, &args);
391 446
392 coro_transfer (args.main, args.self); 447 coro_transfer (args.main, args.self);
393 } 448 }

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