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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 1.17 by root, Tue Aug 30 21:32:17 2005 UTC

1/* 1/*
2 * Copyright (c) 2001 Marc Alexander Lehmann <pcg@goof.com> 2 * Copyright (c) 2001-2005 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# else
44# define STACK_ADJUST_PTR(sp,ss) (sp)
45# define STACK_ADJUST_SIZE(sp,ss) (ss)
46# endif
47#endif
36 48
49#if CORO_SJLJ || CORO_LOSER || CORO_LINUX || CORO_IRIX
50
51#include <stdlib.h>
52
53#if CORO_SJLJ
54# include <stdio.h>
37#include <signal.h> 55# include <signal.h>
56# include <unistd.h>
57#endif
38 58
39static volatile coro_func coro_init_func; 59static volatile coro_func coro_init_func;
40static volatile void *coro_init_arg; 60static volatile void *coro_init_arg;
41static volatile coro_context *new_coro, *create_coro; 61static volatile coro_context *new_coro, *create_coro;
42 62
… …
53 /* the new coro returned. bad. just abort() for now */ 73 /* the new coro returned. bad. just abort() for now */
54 abort (); 74 abort ();
55} 75}
56 76
57# if CORO_SJLJ 77# if CORO_SJLJ
58# define coro_save(ctx) (void)setjmp((ctx)->env)
59 78
60static volatile int trampoline_count; 79static volatile int trampoline_count;
61 80
62/* trampoline signal handler */ 81/* trampoline signal handler */
63static void 82static void
64trampoline(int sig) 83trampoline (int sig)
65{ 84{
66 if (setjmp (((coro_context *)new_coro)->env)) 85 if (setjmp (((coro_context *)new_coro)->env))
67 coro_init (); /* start it */ 86 coro_init (); /* start it */
68 else 87 else
69 trampoline_count++; 88 trampoline_count++;
70} 89}
71 90
72# endif 91# endif
73 92
74#elif CORO_UCONTEXT
75# define coro_save(ctx) getcontext(&((ctx)->uc))
76#endif 93#endif
77 94
78/* initialize a machine state */ 95/* initialize a machine state */
79void coro_create(coro_context *ctx, 96void coro_create(coro_context *ctx,
80 coro_func coro, void *arg, 97 coro_func coro, void *arg,
… …
82{ 99{
83#if CORO_UCONTEXT 100#if CORO_UCONTEXT
84 101
85 getcontext (&(ctx->uc)); 102 getcontext (&(ctx->uc));
86 103
87 ctx->uc.uc_link = 0; 104 ctx->uc.uc_link = 0;
88 ctx->uc.uc_stack.ss_sp = sptr; 105 ctx->uc.uc_stack.ss_sp = STACK_ADJUST_PTR (sptr,ssize);
89 ctx->uc.uc_stack.ss_size = (size_t) ssize; 106 ctx->uc.uc_stack.ss_size = (size_t) STACK_ADJUST_SIZE (sptr,ssize);
90 ctx->uc.uc_stack.ss_flags = 0; 107 ctx->uc.uc_stack.ss_flags = 0;
91 108
92 makecontext (&(ctx->uc), (void (*)()) coro, 1, arg); 109 makecontext (&(ctx->uc), (void (*)()) coro, 1, arg);
93 110
94#elif CORO_SJLJ || CORO_LOOSE || CORO_LINUX 111#elif CORO_SJLJ || CORO_LOSER || CORO_LINUX || CORO_IRIX
95 112
96# if CORO_SJLJ 113# if CORO_SJLJ
97 stack_t ostk, nstk; 114 stack_t ostk, nstk;
98 struct sigaction osa, nsa; 115 struct sigaction osa, nsa;
99 sigset_t nsig, osig; 116 sigset_t nsig, osig;
… …
119 136
120 if (sigaction (SIGUSR2, &nsa, &osa)) 137 if (sigaction (SIGUSR2, &nsa, &osa))
121 perror ("sigaction"); 138 perror ("sigaction");
122 139
123 /* set the new stack */ 140 /* set the new stack */
124 nstk.ss_sp = sptr; 141 nstk.ss_sp = STACK_ADJUST_PTR (sptr,ssize); /* yes, some platforms (IRIX) get this wrong. */
125 nstk.ss_size = ssize; 142 nstk.ss_size = STACK_ADJUST_SIZE (sptr,ssize);
126 nstk.ss_flags = 0; 143 nstk.ss_flags = 0;
127 144
128 if (sigaltstack (&nstk, &ostk) < 0) 145 if (sigaltstack (&nstk, &ostk) < 0)
129 perror ("sigaltstack"); 146 perror ("sigaltstack");
130 147
… …
149 166
150 sigaction (SIGUSR1, &osa, 0); 167 sigaction (SIGUSR1, &osa, 0);
151 168
152 sigprocmask (SIG_SETMASK, &osig, 0); 169 sigprocmask (SIG_SETMASK, &osig, 0);
153 170
154# elif CORO_LOOSE 171# elif CORO_LOSER
155 172
156 setjmp (ctx->env); 173 setjmp (ctx->env);
157 ctx->env[7] = (int)((char *)sptr + ssize); 174 ctx->env[7] = (long)((char *)sptr + ssize);
158 ctx->env[8] = (int)coro_init; 175 ctx->env[8] = (long)coro_init;
159 176
160# elif CORO_LINUX 177# elif CORO_LINUX
161 178
162 setjmp (ctx->env); 179 setjmp (ctx->env);
163#if defined(__GLIBC__) && defined(__GLIBC_MINOR__) \ 180#if defined(__GLIBC__) && defined(__GLIBC_MINOR__) \
164 && __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined(JB_PC) && defined(JB_SP) 181 && __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined(JB_PC) && defined(JB_SP)
165 ctx->env[0].__jmpbuf[JB_PC] = (int)coro_init; 182 ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init;
166 ctx->env[0].__jmpbuf[JB_SP] = (int)((char *)sptr + ssize); 183 ctx->env[0].__jmpbuf[JB_SP] = (long)STACK_ADJUST_PTR (sptr,ssize);
167#elif defined(__GLIBC__) && defined(__GLIBC_MINOR__) \ 184#elif defined(__GLIBC__) && defined(__GLIBC_MINOR__) \
168 && __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined(__mc68000__) 185 && __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined(__mc68000__)
169 ctx->env[0].__jmpbuf[0].__aregs[0] = (long int)coro_init; 186 ctx->env[0].__jmpbuf[0].__aregs[0] = (long int)coro_init;
170 ctx->env[0].__jmpbuf[0].__sp = (int *)((char *)sptr + ssize); 187 ctx->env[0].__jmpbuf[0].__sp = (int *)((char *)sptr + ssize);
171#elif defined(__GNU_LIBRARY__) && defined(__i386__) 188#elif defined(__GNU_LIBRARY__) && defined(__i386__)
172 ctx->env[0].__jmpbuf[0].__pc = (char *)coro_init; 189 ctx->env[0].__jmpbuf[0].__pc = (char *)coro_init;
173 ctx->env[0].__jmpbuf[0].__sp = (void *)((char *)sptr + ssize); 190 ctx->env[0].__jmpbuf[0].__sp = (void *)((char *)sptr + ssize);
191#elif defined(__GNU_LIBRARY__) && defined(__amd64__)
192 ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init;
193 ctx->env[0].__jmpbuf[JB_RSP] = (long)((char *)sptr + ssize);
174#else 194#else
175#error "Unsupported Linux (g)libc version and/or platform" 195#error "linux libc or architecture not supported"
176#endif 196#endif
197
198# elif CORO_IRIX
199
200 setjmp (ctx->env);
201 ctx->env[JB_PC] = (__uint64_t)coro_init;
202 ctx->env[JB_SP] = (__uint64_t)STACK_ADJUST_PTR (sptr,ssize);
177 203
178# endif 204# endif
179 205
180 coro_transfer ((coro_context *)create_coro, (coro_context *)new_coro); 206 coro_transfer ((coro_context *)create_coro, (coro_context *)new_coro);
181 207

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