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Comparing libcoro/coro.c (file contents):
Revision 1.4 by root, Tue Jul 24 19:52:55 2001 UTC vs.
Revision 1.25 by root, Fri Apr 27 19:26:18 2007 UTC

1/* 1/*
2 * Copyright (c) 2001 Marc Alexander Lehmann <pcg@goof.com> 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,
… …
30 * go to Ralf S. Engelschall <rse@engelschall.com>. 30 * go to Ralf S. Engelschall <rse@engelschall.com>.
31 */ 31 */
32 32
33#include "coro.h" 33#include "coro.h"
34 34
35#if CORO_LOOSE || CORO_SJLJ || CORO_LINUX 35#if !defined(STACK_ADJUST_PTR)
36/* IRIX is decidedly NON-unix */
37# if __sgi
38# define STACK_ADJUST_PTR(sp,ss) ((char *)(sp) + (ss) - 8)
39# define STACK_ADJUST_SIZE(sp,ss) ((ss) - 8)
40# elif __i386__ && CORO_LINUX
41# define STACK_ADJUST_PTR(sp,ss) ((char *)(sp) + (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)
46# else
47# define STACK_ADJUST_PTR(sp,ss) (sp)
48# define STACK_ADJUST_SIZE(sp,ss) (ss)
49# endif
50#endif
36 51
52#if CORO_UCONTEXT
53# include <stddef.h>
54#endif
55
56#if CORO_SJLJ || CORO_LOSER || CORO_LINUX || CORO_IRIX
57
58#include <stdlib.h>
59
60#if CORO_SJLJ
61# include <stdio.h>
37#include <signal.h> 62# include <signal.h>
63# include <unistd.h>
64#endif
38 65
39static volatile coro_func coro_init_func; 66static volatile coro_func coro_init_func;
40static volatile void *coro_init_arg; 67static volatile void *coro_init_arg;
41static 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
42 75
43static void 76static void
44coro_init (void) 77coro_init (void)
45{ 78{
46 volatile coro_func func = coro_init_func; 79 volatile coro_func func = coro_init_func;
47 volatile void *arg = coro_init_arg; 80 volatile void *arg = coro_init_arg;
48 81
49 coro_transfer ((coro_context *)new_coro, (coro_context *)create_coro); 82 coro_transfer ((coro_context *)new_coro, (coro_context *)create_coro);
50 83
84#if HAVE_CFI
85 asm (".cfi_startproc");
86#endif
51 func ((void *)arg); 87 func ((void *)arg);
88#if HAVE_CFI
89 asm (".cfi_endproc");
90#endif
52 91
53 /* the new coro returned. bad. just abort() for now */ 92 /* the new coro returned. bad. just abort() for now */
54 abort (); 93 abort ();
55} 94}
56 95
57# if CORO_SJLJ 96# if CORO_SJLJ
58# define coro_save(ctx) (void)setjmp((ctx)->env)
59 97
60static volatile int trampoline_count; 98static volatile int trampoline_count;
61 99
62/* trampoline signal handler */ 100/* trampoline signal handler */
63static void 101static void
64trampoline(int sig) 102trampoline (int sig)
65{ 103{
66 if (setjmp (((coro_context *)new_coro)->env)) 104 if (setjmp (((coro_context *)new_coro)->env))
67 coro_init (); /* start it */ 105 coro_init (); /* start it */
68 else 106 else
69 trampoline_count++; 107 trampoline_count++;
70} 108}
71 109
72# endif 110# endif
73 111
74#elif CORO_UCONTEXT
75# define coro_save(ctx) getcontext(&((ctx)->uc))
76#endif 112#endif
77 113
78/* initialize a machine state */ 114/* initialize a machine state */
79void coro_create(coro_context *ctx, 115void coro_create (coro_context *ctx,
80 coro_func coro, void *arg, 116 coro_func coro, void *arg,
81 void *sptr, long ssize) 117 void *sptr, long ssize)
82{ 118{
83#if CORO_UCONTEXT 119#if CORO_UCONTEXT
84 120
85 getcontext (&(ctx->uc)); 121 getcontext (&(ctx->uc));
86 122
87 ctx->uc.uc_link = 0; 123 ctx->uc.uc_link = 0;
88 ctx->uc.uc_stack.ss_sp = sptr; 124 ctx->uc.uc_stack.ss_sp = STACK_ADJUST_PTR (sptr,ssize);
89 ctx->uc.uc_stack.ss_size = (size_t) ssize; 125 ctx->uc.uc_stack.ss_size = (size_t) STACK_ADJUST_SIZE (sptr,ssize);
90 ctx->uc.uc_stack.ss_flags = 0; 126 ctx->uc.uc_stack.ss_flags = 0;
91 127
92 makecontext (&(ctx->uc), (void (*)()) coro, 1, arg); 128 makecontext (&(ctx->uc), (void (*)()) coro, 1, arg);
93 129
94#elif CORO_SJLJ || CORO_LOOSE || CORO_LINUX 130#elif CORO_SJLJ || CORO_LOSER || CORO_LINUX || CORO_IRIX
95 131
96# if CORO_SJLJ 132# if CORO_SJLJ
97 stack_t ostk, nstk; 133 stack_t ostk, nstk;
98 struct sigaction osa, nsa; 134 struct sigaction osa, nsa;
99 sigset_t nsig, osig; 135 sigset_t nsig, osig;
… …
116 nsa.sa_handler = trampoline; 152 nsa.sa_handler = trampoline;
117 sigemptyset (&nsa.sa_mask); 153 sigemptyset (&nsa.sa_mask);
118 nsa.sa_flags = SA_ONSTACK; 154 nsa.sa_flags = SA_ONSTACK;
119 155
120 if (sigaction (SIGUSR2, &nsa, &osa)) 156 if (sigaction (SIGUSR2, &nsa, &osa))
157 {
121 perror ("sigaction"); 158 perror ("sigaction");
159 abort ();
160 }
122 161
123 /* set the new stack */ 162 /* set the new stack */
124 nstk.ss_sp = sptr; 163 nstk.ss_sp = STACK_ADJUST_PTR (sptr,ssize); /* yes, some platforms (IRIX) get this wrong. */
125 nstk.ss_size = ssize; 164 nstk.ss_size = STACK_ADJUST_SIZE (sptr,ssize);
126 nstk.ss_flags = 0; 165 nstk.ss_flags = 0;
127 166
128 if (sigaltstack (&nstk, &ostk) < 0) 167 if (sigaltstack (&nstk, &ostk) < 0)
168 {
129 perror ("sigaltstack"); 169 perror ("sigaltstack");
170 abort ();
171 }
130 172
131 trampoline_count = 0; 173 trampoline_count = 0;
132 kill (getpid (), SIGUSR2); 174 kill (getpid (), SIGUSR2);
133 sigfillset (&nsig); sigdelset (&nsig, SIGUSR2); 175 sigfillset (&nsig); sigdelset (&nsig, SIGUSR2);
134 176
… …
145 abort (); 187 abort ();
146 188
147 if (~ostk.ss_flags & SS_DISABLE) 189 if (~ostk.ss_flags & SS_DISABLE)
148 sigaltstack (&ostk, 0); 190 sigaltstack (&ostk, 0);
149 191
150 sigaction (SIGUSR1, &osa, 0); 192 sigaction (SIGUSR2, &osa, 0);
151 193
152 sigprocmask (SIG_SETMASK, &osig, 0); 194 sigprocmask (SIG_SETMASK, &osig, 0);
153 195
154# elif CORO_LOOSE 196# elif CORO_LOSER
155 197
156 setjmp (ctx->env); 198 setjmp (ctx->env);
199#if __CYGWIN__
157 ctx->env[7] = (int)((char *)sptr + ssize); 200 ctx->env[7] = (long)((char *)sptr + ssize);
158 ctx->env[8] = (int)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
159 214
160# elif CORO_LINUX 215# elif CORO_LINUX
161 216
162 setjmp (ctx->env); 217 _setjmp (ctx->env);
163#if defined(__GLIBC__) && defined(__GLIBC_MINOR__) \
164 && __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined(JB_PC) && defined(JB_SP) 218#if __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (JB_PC) && defined (JB_SP)
165 ctx->env[0].__jmpbuf[JB_PC] = (int)coro_init; 219 ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init;
166 ctx->env[0].__jmpbuf[JB_SP] = (int)((char *)sptr + ssize); 220 ctx->env[0].__jmpbuf[JB_SP] = (long)STACK_ADJUST_PTR (sptr, ssize);
167#elif defined(__GLIBC__) && defined(__GLIBC_MINOR__) \
168 && __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined(__mc68000__) 221#elif __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (__mc68000__)
169 ctx->env[0].__jmpbuf[0].__aregs[0] = (long int)coro_init; 222 ctx->env[0].__jmpbuf[0].__aregs[0] = (long int)coro_init;
170 ctx->env[0].__jmpbuf[0].__sp = (int *)((char *)sptr + ssize); 223 ctx->env[0].__jmpbuf[0].__sp = (int *)((char *)sptr + ssize);
171#elif defined(__GNU_LIBRARY__) && defined(__i386__) 224#elif defined (__GNU_LIBRARY__) && defined (__i386__)
172 ctx->env[0].__jmpbuf[0].__pc = (char *)coro_init; 225 ctx->env[0].__jmpbuf[0].__pc = (char *)coro_init;
173 ctx->env[0].__jmpbuf[0].__sp = (void *)((char *)sptr + ssize); 226 ctx->env[0].__jmpbuf[0].__sp = (void *)((char *)sptr + ssize);
227#elif defined (__GNU_LIBRARY__) && defined (__amd64__)
228 ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init;
229 ctx->env[0].__jmpbuf[JB_RSP] = (long)STACK_ADJUST_PTR (sptr, ssize);
174#else 230#else
175#error "Unsupported Linux (g)libc version and/or platform" 231#error "linux libc or architecture not supported"
176#endif 232#endif
233
234# elif CORO_IRIX
235
236 setjmp (ctx->env);
237 ctx->env[JB_PC] = (__uint64_t)coro_init;
238 ctx->env[JB_SP] = (__uint64_t)STACK_ADJUST_PTR (sptr, ssize);
177 239
178# endif 240# endif
179 241
180 coro_transfer ((coro_context *)create_coro, (coro_context *)new_coro); 242 coro_transfer ((coro_context *)create_coro, (coro_context *)new_coro);
181 243

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