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Comparing libcoro/coro.c (file contents):
Revision 1.19 by root, Wed Oct 19 19:04:24 2005 UTC vs.
Revision 1.26 by root, Fri Apr 27 19:35:28 2007 UTC

1/* 1/*
2 * Copyright (c) 2001-2005 Marc Alexander Lehmann <schmorp@schmorp.de> 2 * Copyright (c) 2001-2006 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,
… …
47# define STACK_ADJUST_PTR(sp,ss) (sp) 47# define STACK_ADJUST_PTR(sp,ss) (sp)
48# define STACK_ADJUST_SIZE(sp,ss) (ss) 48# define STACK_ADJUST_SIZE(sp,ss) (ss)
49# endif 49# endif
50#endif 50#endif
51 51
52#if CORO_UCONTEXT
53# include <stddef.h>
54#endif
55
52#if CORO_SJLJ || CORO_LOSER || CORO_LINUX || CORO_IRIX 56#if CORO_SJLJ || CORO_LOSER || CORO_LINUX || CORO_IRIX
53 57
54#include <stdlib.h> 58#include <stdlib.h>
55 59
56#if CORO_SJLJ 60#if CORO_SJLJ
… …
60#endif 64#endif
61 65
62static volatile coro_func coro_init_func; 66static volatile coro_func coro_init_func;
63static volatile void *coro_init_arg; 67static volatile void *coro_init_arg;
64static volatile coro_context *new_coro, *create_coro; 68static volatile coro_context *new_coro, *create_coro;
69
70/* what we really want to detect here is wether we use a new-enough version of GAS */
71/* instead, check for gcc 3 and ELF and hope for the best */
72#if __GNUC__ >= 3 && __ELF__
73# define HAVE_CFI 1
74#endif
65 75
66static void 76static void
67coro_init (void) 77coro_init (void)
68{ 78{
69 volatile coro_func func = coro_init_func; 79 volatile coro_func func = coro_init_func;
… …
84/* trampoline signal handler */ 94/* trampoline signal handler */
85static void 95static void
86trampoline (int sig) 96trampoline (int sig)
87{ 97{
88 if (setjmp (((coro_context *)new_coro)->env)) 98 if (setjmp (((coro_context *)new_coro)->env))
99 {
100#if HAVE_CFI
101 asm (".cfi_startproc");
102#endif
89 coro_init (); /* start it */ 103 coro_init (); /* start it */
104#if HAVE_CFI
105 asm (".cfi_endproc");
106#endif
107 }
90 else 108 else
91 trampoline_count++; 109 trampoline_count++;
92} 110}
93 111
94# endif 112# endif
95 113
96#endif 114#endif
97 115
98/* initialize a machine state */ 116/* initialize a machine state */
99void coro_create(coro_context *ctx, 117void coro_create (coro_context *ctx,
100 coro_func coro, void *arg, 118 coro_func coro, void *arg,
101 void *sptr, long ssize) 119 void *sptr, long ssize)
102{ 120{
103#if CORO_UCONTEXT 121#if CORO_UCONTEXT
104 122
105 getcontext (&(ctx->uc)); 123 getcontext (&(ctx->uc));
106 124
… …
136 nsa.sa_handler = trampoline; 154 nsa.sa_handler = trampoline;
137 sigemptyset (&nsa.sa_mask); 155 sigemptyset (&nsa.sa_mask);
138 nsa.sa_flags = SA_ONSTACK; 156 nsa.sa_flags = SA_ONSTACK;
139 157
140 if (sigaction (SIGUSR2, &nsa, &osa)) 158 if (sigaction (SIGUSR2, &nsa, &osa))
159 {
141 perror ("sigaction"); 160 perror ("sigaction");
161 abort ();
162 }
142 163
143 /* set the new stack */ 164 /* set the new stack */
144 nstk.ss_sp = STACK_ADJUST_PTR (sptr,ssize); /* yes, some platforms (IRIX) get this wrong. */ 165 nstk.ss_sp = STACK_ADJUST_PTR (sptr,ssize); /* yes, some platforms (IRIX) get this wrong. */
145 nstk.ss_size = STACK_ADJUST_SIZE (sptr,ssize); 166 nstk.ss_size = STACK_ADJUST_SIZE (sptr,ssize);
146 nstk.ss_flags = 0; 167 nstk.ss_flags = 0;
147 168
148 if (sigaltstack (&nstk, &ostk) < 0) 169 if (sigaltstack (&nstk, &ostk) < 0)
170 {
149 perror ("sigaltstack"); 171 perror ("sigaltstack");
172 abort ();
173 }
150 174
151 trampoline_count = 0; 175 trampoline_count = 0;
152 kill (getpid (), SIGUSR2); 176 kill (getpid (), SIGUSR2);
153 sigfillset (&nsig); sigdelset (&nsig, SIGUSR2); 177 sigfillset (&nsig); sigdelset (&nsig, SIGUSR2);
154 178
… …
172 sigprocmask (SIG_SETMASK, &osig, 0); 196 sigprocmask (SIG_SETMASK, &osig, 0);
173 197
174# elif CORO_LOSER 198# elif CORO_LOSER
175 199
176 setjmp (ctx->env); 200 setjmp (ctx->env);
201#if __CYGWIN__
177 ctx->env[7] = (long)((char *)sptr + ssize); 202 ctx->env[7] = (long)((char *)sptr + ssize);
178 ctx->env[8] = (long)coro_init; 203 ctx->env[8] = (long)coro_init;
204#elif defined(_M_IX86)
205 ((_JUMP_BUFFER *)&ctx->env)->Eip = (long)coro_init;
206 ((_JUMP_BUFFER *)&ctx->env)->Esp = (long)STACK_ADJUST_PTR (sptr,ssize);
207#elif defined(_M_AMD64)
208 ((_JUMP_BUFFER *)&ctx->env)->Rip = (__int64)coro_init;
209 ((_JUMP_BUFFER *)&ctx->env)->Rsp = (__int64)STACK_ADJUST_PTR (sptr,ssize);
210#elif defined(_M_IA64)
211 ((_JUMP_BUFFER *)&ctx->env)->StIIP = (__int64)coro_init;
212 ((_JUMP_BUFFER *)&ctx->env)->IntSp = (__int64)STACK_ADJUST_PTR (sptr,ssize);
213#else
214#error "microsoft libc or architecture not supported"
215#endif
179 216
180# elif CORO_LINUX 217# elif CORO_LINUX
181 218
182 setjmp (ctx->env); 219 _setjmp (ctx->env);
183#if defined(__GLIBC__) && defined(__GLIBC_MINOR__) \
184 && __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined(JB_PC) && defined(JB_SP) 220#if __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (JB_PC) && defined (JB_SP)
185 ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init; 221 ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init;
186 ctx->env[0].__jmpbuf[JB_SP] = (long)STACK_ADJUST_PTR (sptr,ssize); 222 ctx->env[0].__jmpbuf[JB_SP] = (long)STACK_ADJUST_PTR (sptr, ssize);
187#elif defined(__GLIBC__) && defined(__GLIBC_MINOR__) \
188 && __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined(__mc68000__) 223#elif __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (__mc68000__)
189 ctx->env[0].__jmpbuf[0].__aregs[0] = (long int)coro_init; 224 ctx->env[0].__jmpbuf[0].__aregs[0] = (long int)coro_init;
190 ctx->env[0].__jmpbuf[0].__sp = (int *)((char *)sptr + ssize); 225 ctx->env[0].__jmpbuf[0].__sp = (int *)((char *)sptr + ssize);
191#elif defined(__GNU_LIBRARY__) && defined(__i386__) 226#elif defined (__GNU_LIBRARY__) && defined (__i386__)
192 ctx->env[0].__jmpbuf[0].__pc = (char *)coro_init; 227 ctx->env[0].__jmpbuf[0].__pc = (char *)coro_init;
193 ctx->env[0].__jmpbuf[0].__sp = (void *)((char *)sptr + ssize); 228 ctx->env[0].__jmpbuf[0].__sp = (void *)((char *)sptr + ssize);
194#elif defined(__GNU_LIBRARY__) && defined(__amd64__) 229#elif defined (__GNU_LIBRARY__) && defined (__amd64__)
195 ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init; 230 ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init;
196 ctx->env[0].__jmpbuf[JB_RSP] = (long)STACK_ADJUST_PTR (sptr,ssize); 231 ctx->env[0].__jmpbuf[JB_RSP] = (long)STACK_ADJUST_PTR (sptr, ssize);
197#else 232#else
198#error "linux libc or architecture not supported" 233#error "linux libc or architecture not supported"
199#endif 234#endif
200 235
201# elif CORO_IRIX 236# elif CORO_IRIX
202 237
203 setjmp (ctx->env); 238 setjmp (ctx->env);
204 ctx->env[JB_PC] = (__uint64_t)coro_init; 239 ctx->env[JB_PC] = (__uint64_t)coro_init;
205 ctx->env[JB_SP] = (__uint64_t)STACK_ADJUST_PTR (sptr,ssize); 240 ctx->env[JB_SP] = (__uint64_t)STACK_ADJUST_PTR (sptr, ssize);
206 241
207# endif 242# endif
208 243
209 coro_transfer ((coro_context *)create_coro, (coro_context *)new_coro); 244 coro_transfer ((coro_context *)create_coro, (coro_context *)new_coro);
210 245

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