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Comparing libcoro/coro.c (file contents):
Revision 1.3 by root, Mon Jul 23 22:16:38 2001 UTC vs.
Revision 1.24 by root, Mon Feb 12 15:56:46 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 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;
42 69
… …
53 /* the new coro returned. bad. just abort() for now */ 80 /* the new coro returned. bad. just abort() for now */
54 abort (); 81 abort ();
55} 82}
56 83
57# if CORO_SJLJ 84# if CORO_SJLJ
58# define coro_save(ctx) (void)setjmp((ctx)->env)
59 85
60static volatile int trampoline_count; 86static volatile int trampoline_count;
61 87
62/* trampoline signal handler */ 88/* trampoline signal handler */
63static void 89static void
64trampoline(int sig) 90trampoline (int sig)
65{ 91{
66 if (setjmp (((coro_context *)new_coro)->env)) 92 if (setjmp (((coro_context *)new_coro)->env))
67 coro_init (); /* start it */ 93 coro_init (); /* start it */
68 else 94 else
69 trampoline_count++; 95 trampoline_count++;
70} 96}
71 97
72# endif 98# endif
73 99
74#elif CORO_UCONTEXT
75# define coro_save(ctx) getcontext(&((ctx)->uc))
76#endif 100#endif
77 101
78/* initialize a machine state */ 102/* initialize a machine state */
79void coro_create(coro_context *ctx, 103void coro_create (coro_context *ctx,
80 coro_func coro, void *arg, 104 coro_func coro, void *arg,
81 void *sptr, long ssize) 105 void *sptr, long ssize)
82{ 106{
83#if CORO_UCONTEXT 107#if CORO_UCONTEXT
84 108
85 getcontext (&(ctx->uc)); 109 getcontext (&(ctx->uc));
86 110
87 ctx->uc.uc_link = 0; 111 ctx->uc.uc_link = 0;
88 ctx->uc.uc_stack.ss_sp = sptr; 112 ctx->uc.uc_stack.ss_sp = STACK_ADJUST_PTR (sptr,ssize);
89 ctx->uc.uc_stack.ss_size = (size_t) ssize; 113 ctx->uc.uc_stack.ss_size = (size_t) STACK_ADJUST_SIZE (sptr,ssize);
90 ctx->uc.uc_stack.ss_flags = 0; 114 ctx->uc.uc_stack.ss_flags = 0;
91 115
92 makecontext (&(ctx->uc), (void (*)()) coro, 1, arg); 116 makecontext (&(ctx->uc), (void (*)()) coro, 1, arg);
93 117
94#elif CORO_SJLJ || CORO_LOOSE 118#elif CORO_SJLJ || CORO_LOSER || CORO_LINUX || CORO_IRIX
95 119
96# if CORO_SJLJ 120# if CORO_SJLJ
97 stack_t ostk, nstk; 121 stack_t ostk, nstk;
98 struct sigaction osa, nsa; 122 struct sigaction osa, nsa;
99 sigset_t nsig, osig; 123 sigset_t nsig, osig;
… …
116 nsa.sa_handler = trampoline; 140 nsa.sa_handler = trampoline;
117 sigemptyset (&nsa.sa_mask); 141 sigemptyset (&nsa.sa_mask);
118 nsa.sa_flags = SA_ONSTACK; 142 nsa.sa_flags = SA_ONSTACK;
119 143
120 if (sigaction (SIGUSR2, &nsa, &osa)) 144 if (sigaction (SIGUSR2, &nsa, &osa))
145 {
121 perror ("sigaction"); 146 perror ("sigaction");
147 abort ();
148 }
122 149
123 /* set the new stack */ 150 /* set the new stack */
124 nstk.ss_sp = sptr; 151 nstk.ss_sp = STACK_ADJUST_PTR (sptr,ssize); /* yes, some platforms (IRIX) get this wrong. */
125 nstk.ss_size = ssize; 152 nstk.ss_size = STACK_ADJUST_SIZE (sptr,ssize);
126 nstk.ss_flags = 0; 153 nstk.ss_flags = 0;
127 154
128 if (sigaltstack (&nstk, &ostk) < 0) 155 if (sigaltstack (&nstk, &ostk) < 0)
156 {
129 perror ("sigaltstack"); 157 perror ("sigaltstack");
158 abort ();
159 }
130 160
131 trampoline_count = 0; 161 trampoline_count = 0;
132 kill (getpid (), SIGUSR2); 162 kill (getpid (), SIGUSR2);
133 sigfillset (&nsig); sigdelset (&nsig, SIGUSR2); 163 sigfillset (&nsig); sigdelset (&nsig, SIGUSR2);
134 164
… …
145 abort (); 175 abort ();
146 176
147 if (~ostk.ss_flags & SS_DISABLE) 177 if (~ostk.ss_flags & SS_DISABLE)
148 sigaltstack (&ostk, 0); 178 sigaltstack (&ostk, 0);
149 179
150 sigaction (SIGUSR1, &osa, 0); 180 sigaction (SIGUSR2, &osa, 0);
151 181
152 sigprocmask (SIG_SETMASK, &osig, 0); 182 sigprocmask (SIG_SETMASK, &osig, 0);
153 183
154# elif MS_LOOSE 184# elif CORO_LOSER
155 185
156 coro_save (ctx); 186 setjmp (ctx->env);
187#if __CYGWIN__
157 ctx->env[7] = (int)((char *)sptr + ssize); 188 ctx->env[7] = (long)((char *)sptr + ssize);
158 ctx->env[8] = (int)coro; 189 ctx->env[8] = (long)coro_init;
190#elif defined(_M_IX86)
191 ((_JUMP_BUFFER *)&ctx->env)->Eip = (long)coro_init;
192 ((_JUMP_BUFFER *)&ctx->env)->Esp = (long)STACK_ADJUST_PTR (sptr,ssize);
193#elif defined(_M_AMD64)
194 ((_JUMP_BUFFER *)&ctx->env)->Rip = (__int64)coro_init;
195 ((_JUMP_BUFFER *)&ctx->env)->Rsp = (__int64)STACK_ADJUST_PTR (sptr,ssize);
196#elif defined(_M_IA64)
197 ((_JUMP_BUFFER *)&ctx->env)->StIIP = (__int64)coro_init;
198 ((_JUMP_BUFFER *)&ctx->env)->IntSp = (__int64)STACK_ADJUST_PTR (sptr,ssize);
199#else
200#error "microsoft libc or architecture not supported"
201#endif
202
203# elif CORO_LINUX
204
205 _setjmp (ctx->env);
206#if __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (JB_PC) && defined (JB_SP)
207 ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init;
208 ctx->env[0].__jmpbuf[JB_SP] = (long)STACK_ADJUST_PTR (sptr, ssize);
209#elif __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (__mc68000__)
210 ctx->env[0].__jmpbuf[0].__aregs[0] = (long int)coro_init;
211 ctx->env[0].__jmpbuf[0].__sp = (int *)((char *)sptr + ssize);
212#elif defined (__GNU_LIBRARY__) && defined (__i386__)
213 ctx->env[0].__jmpbuf[0].__pc = (char *)coro_init;
214 ctx->env[0].__jmpbuf[0].__sp = (void *)((char *)sptr + ssize);
215#elif defined (__GNU_LIBRARY__) && defined (__amd64__)
216 ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init;
217 ctx->env[0].__jmpbuf[JB_RSP] = (long)STACK_ADJUST_PTR (sptr, ssize);
218#else
219#error "linux libc or architecture not supported"
220#endif
221
222# elif CORO_IRIX
223
224 setjmp (ctx->env);
225 ctx->env[JB_PC] = (__uint64_t)coro_init;
226 ctx->env[JB_SP] = (__uint64_t)STACK_ADJUST_PTR (sptr, ssize);
159 227
160# endif 228# endif
161 229
162 coro_transfer ((coro_context *)create_coro, (coro_context *)new_coro); 230 coro_transfer ((coro_context *)create_coro, (coro_context *)new_coro);
163 231

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