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/cvs/cvsroot/libcoro/coro.c
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Comparing cvsroot/libcoro/coro.c (file contents):
Revision 1.14 by root, Mon Mar 21 14:17:44 2005 UTC vs.
Revision 1.25 by root, Fri Apr 27 19:26:18 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,
… …
38# define STACK_ADJUST_PTR(sp,ss) ((char *)(sp) + (ss) - 8) 38# define STACK_ADJUST_PTR(sp,ss) ((char *)(sp) + (ss) - 8)
39# define STACK_ADJUST_SIZE(sp,ss) ((ss) - 8) 39# define STACK_ADJUST_SIZE(sp,ss) ((ss) - 8)
40# elif __i386__ && CORO_LINUX 40# elif __i386__ && CORO_LINUX
41# define STACK_ADJUST_PTR(sp,ss) ((char *)(sp) + (ss)) 41# define STACK_ADJUST_PTR(sp,ss) ((char *)(sp) + (ss))
42# define STACK_ADJUST_SIZE(sp,ss) (ss) 42# define STACK_ADJUST_SIZE(sp,ss) (ss)
43# elif __amd64__ && CORO_LINUX
44# define STACK_ADJUST_PTR(sp,ss) ((char *)(sp) + (ss) - 8)
45# define STACK_ADJUST_SIZE(sp,ss) (ss)
43# else 46# else
44# define STACK_ADJUST_PTR(sp,ss) (sp) 47# define STACK_ADJUST_PTR(sp,ss) (sp)
45# define STACK_ADJUST_SIZE(sp,ss) (ss) 48# define STACK_ADJUST_SIZE(sp,ss) (ss)
46# endif 49# endif
47#endif 50#endif
48 51
52#if CORO_UCONTEXT
53# include <stddef.h>
54#endif
55
49#if CORO_SJLJ || CORO_LOOSE || CORO_LINUX || CORO_IRIX 56#if CORO_SJLJ || CORO_LOSER || CORO_LINUX || CORO_IRIX
57
58#include <stdlib.h>
50 59
51#if CORO_SJLJ 60#if CORO_SJLJ
61# include <stdio.h>
52# include <signal.h> 62# include <signal.h>
63# include <unistd.h>
53#endif 64#endif
54 65
55static volatile coro_func coro_init_func; 66static volatile coro_func coro_init_func;
56static volatile void *coro_init_arg; 67static volatile void *coro_init_arg;
57static 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
58 75
59static void 76static void
60coro_init (void) 77coro_init (void)
61{ 78{
62 volatile coro_func func = coro_init_func; 79 volatile coro_func func = coro_init_func;
63 volatile void *arg = coro_init_arg; 80 volatile void *arg = coro_init_arg;
64 81
65 coro_transfer ((coro_context *)new_coro, (coro_context *)create_coro); 82 coro_transfer ((coro_context *)new_coro, (coro_context *)create_coro);
66 83
84#if HAVE_CFI
85 asm (".cfi_startproc");
86#endif
67 func ((void *)arg); 87 func ((void *)arg);
88#if HAVE_CFI
89 asm (".cfi_endproc");
90#endif
68 91
69 /* the new coro returned. bad. just abort() for now */ 92 /* the new coro returned. bad. just abort() for now */
70 abort (); 93 abort ();
71} 94}
72 95
… …
87# endif 110# endif
88 111
89#endif 112#endif
90 113
91/* initialize a machine state */ 114/* initialize a machine state */
92void coro_create(coro_context *ctx, 115void coro_create (coro_context *ctx,
93 coro_func coro, void *arg, 116 coro_func coro, void *arg,
94 void *sptr, long ssize) 117 void *sptr, long ssize)
95{ 118{
96#if CORO_UCONTEXT 119#if CORO_UCONTEXT
97 120
98 getcontext (&(ctx->uc)); 121 getcontext (&(ctx->uc));
99 122
… …
102 ctx->uc.uc_stack.ss_size = (size_t) STACK_ADJUST_SIZE (sptr,ssize); 125 ctx->uc.uc_stack.ss_size = (size_t) STACK_ADJUST_SIZE (sptr,ssize);
103 ctx->uc.uc_stack.ss_flags = 0; 126 ctx->uc.uc_stack.ss_flags = 0;
104 127
105 makecontext (&(ctx->uc), (void (*)()) coro, 1, arg); 128 makecontext (&(ctx->uc), (void (*)()) coro, 1, arg);
106 129
107#elif CORO_SJLJ || CORO_LOOSE || CORO_LINUX || CORO_IRIX 130#elif CORO_SJLJ || CORO_LOSER || CORO_LINUX || CORO_IRIX
108 131
109# if CORO_SJLJ 132# if CORO_SJLJ
110 stack_t ostk, nstk; 133 stack_t ostk, nstk;
111 struct sigaction osa, nsa; 134 struct sigaction osa, nsa;
112 sigset_t nsig, osig; 135 sigset_t nsig, osig;
… …
129 nsa.sa_handler = trampoline; 152 nsa.sa_handler = trampoline;
130 sigemptyset (&nsa.sa_mask); 153 sigemptyset (&nsa.sa_mask);
131 nsa.sa_flags = SA_ONSTACK; 154 nsa.sa_flags = SA_ONSTACK;
132 155
133 if (sigaction (SIGUSR2, &nsa, &osa)) 156 if (sigaction (SIGUSR2, &nsa, &osa))
157 {
134 perror ("sigaction"); 158 perror ("sigaction");
159 abort ();
160 }
135 161
136 /* set the new stack */ 162 /* set the new stack */
137 nstk.ss_sp = STACK_ADJUST_PTR (sptr,ssize); /* yes, some platforms (IRIX) get this wrong. */ 163 nstk.ss_sp = STACK_ADJUST_PTR (sptr,ssize); /* yes, some platforms (IRIX) get this wrong. */
138 nstk.ss_size = STACK_ADJUST_SIZE (sptr,ssize); 164 nstk.ss_size = STACK_ADJUST_SIZE (sptr,ssize);
139 nstk.ss_flags = 0; 165 nstk.ss_flags = 0;
140 166
141 if (sigaltstack (&nstk, &ostk) < 0) 167 if (sigaltstack (&nstk, &ostk) < 0)
168 {
142 perror ("sigaltstack"); 169 perror ("sigaltstack");
170 abort ();
171 }
143 172
144 trampoline_count = 0; 173 trampoline_count = 0;
145 kill (getpid (), SIGUSR2); 174 kill (getpid (), SIGUSR2);
146 sigfillset (&nsig); sigdelset (&nsig, SIGUSR2); 175 sigfillset (&nsig); sigdelset (&nsig, SIGUSR2);
147 176
… …
158 abort (); 187 abort ();
159 188
160 if (~ostk.ss_flags & SS_DISABLE) 189 if (~ostk.ss_flags & SS_DISABLE)
161 sigaltstack (&ostk, 0); 190 sigaltstack (&ostk, 0);
162 191
163 sigaction (SIGUSR1, &osa, 0); 192 sigaction (SIGUSR2, &osa, 0);
164 193
165 sigprocmask (SIG_SETMASK, &osig, 0); 194 sigprocmask (SIG_SETMASK, &osig, 0);
166 195
167# elif CORO_LOOSE 196# elif CORO_LOSER
168 197
169 setjmp (ctx->env); 198 setjmp (ctx->env);
199#if __CYGWIN__
170 ctx->env[7] = (long)((char *)sptr + ssize); 200 ctx->env[7] = (long)((char *)sptr + ssize);
171 ctx->env[8] = (long)coro_init; 201 ctx->env[8] = (long)coro_init;
202#elif defined(_M_IX86)
203 ((_JUMP_BUFFER *)&ctx->env)->Eip = (long)coro_init;
204 ((_JUMP_BUFFER *)&ctx->env)->Esp = (long)STACK_ADJUST_PTR (sptr,ssize);
205#elif defined(_M_AMD64)
206 ((_JUMP_BUFFER *)&ctx->env)->Rip = (__int64)coro_init;
207 ((_JUMP_BUFFER *)&ctx->env)->Rsp = (__int64)STACK_ADJUST_PTR (sptr,ssize);
208#elif defined(_M_IA64)
209 ((_JUMP_BUFFER *)&ctx->env)->StIIP = (__int64)coro_init;
210 ((_JUMP_BUFFER *)&ctx->env)->IntSp = (__int64)STACK_ADJUST_PTR (sptr,ssize);
211#else
212#error "microsoft libc or architecture not supported"
213#endif
172 214
173# elif CORO_LINUX 215# elif CORO_LINUX
174 216
175 setjmp (ctx->env); 217 _setjmp (ctx->env);
176#if defined(__GLIBC__) && defined(__GLIBC_MINOR__) \
177 && __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined(JB_PC) && defined(JB_SP) 218#if __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (JB_PC) && defined (JB_SP)
178 ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init; 219 ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init;
179 ctx->env[0].__jmpbuf[JB_SP] = (long)STACK_ADJUST_PTR (sptr,ssize); 220 ctx->env[0].__jmpbuf[JB_SP] = (long)STACK_ADJUST_PTR (sptr, ssize);
180#elif defined(__GLIBC__) && defined(__GLIBC_MINOR__) \
181 && __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined(__mc68000__) 221#elif __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (__mc68000__)
182 ctx->env[0].__jmpbuf[0].__aregs[0] = (long int)coro_init; 222 ctx->env[0].__jmpbuf[0].__aregs[0] = (long int)coro_init;
183 ctx->env[0].__jmpbuf[0].__sp = (int *)((char *)sptr + ssize); 223 ctx->env[0].__jmpbuf[0].__sp = (int *)((char *)sptr + ssize);
184#elif defined(__GNU_LIBRARY__) && defined(__i386__) 224#elif defined (__GNU_LIBRARY__) && defined (__i386__)
185 ctx->env[0].__jmpbuf[0].__pc = (char *)coro_init; 225 ctx->env[0].__jmpbuf[0].__pc = (char *)coro_init;
186 ctx->env[0].__jmpbuf[0].__sp = (void *)((char *)sptr + ssize); 226 ctx->env[0].__jmpbuf[0].__sp = (void *)((char *)sptr + ssize);
187#elif defined(__GNU_LIBRARY__) && defined(__amd64__) 227#elif defined (__GNU_LIBRARY__) && defined (__amd64__)
188 ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init; 228 ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init;
189 ctx->env[0].__jmpbuf[JB_RSP] = (long)((char *)sptr + ssize); 229 ctx->env[0].__jmpbuf[JB_RSP] = (long)STACK_ADJUST_PTR (sptr, ssize);
190#else 230#else
191#error "linux libc or architecture not supported" 231#error "linux libc or architecture not supported"
192#endif 232#endif
193 233
194# elif CORO_IRIX 234# elif CORO_IRIX
195 235
196 setjmp (ctx->env); 236 setjmp (ctx->env);
197 ctx->env[JB_PC] = (__uint64_t)coro_init; 237 ctx->env[JB_PC] = (__uint64_t)coro_init;
198 ctx->env[JB_SP] = (__uint64_t)STACK_ADJUST_PTR (sptr,ssize); 238 ctx->env[JB_SP] = (__uint64_t)STACK_ADJUST_PTR (sptr, ssize);
199 239
200# endif 240# endif
201 241
202 coro_transfer ((coro_context *)create_coro, (coro_context *)new_coro); 242 coro_transfer ((coro_context *)create_coro, (coro_context *)new_coro);
203 243

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