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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 1.20 by root, Thu Oct 26 05:20:47 2006 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;
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,
… …
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 || CORO_LINUX 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;
… …
119 143
120 if (sigaction (SIGUSR2, &nsa, &osa)) 144 if (sigaction (SIGUSR2, &nsa, &osa))
121 perror ("sigaction"); 145 perror ("sigaction");
122 146
123 /* set the new stack */ 147 /* set the new stack */
124 nstk.ss_sp = sptr; 148 nstk.ss_sp = STACK_ADJUST_PTR (sptr,ssize); /* yes, some platforms (IRIX) get this wrong. */
125 nstk.ss_size = ssize; 149 nstk.ss_size = STACK_ADJUST_SIZE (sptr,ssize);
126 nstk.ss_flags = 0; 150 nstk.ss_flags = 0;
127 151
128 if (sigaltstack (&nstk, &ostk) < 0) 152 if (sigaltstack (&nstk, &ostk) < 0)
129 perror ("sigaltstack"); 153 perror ("sigaltstack");
130 154
… …
145 abort (); 169 abort ();
146 170
147 if (~ostk.ss_flags & SS_DISABLE) 171 if (~ostk.ss_flags & SS_DISABLE)
148 sigaltstack (&ostk, 0); 172 sigaltstack (&ostk, 0);
149 173
150 sigaction (SIGUSR1, &osa, 0); 174 sigaction (SIGUSR2, &osa, 0);
151 175
152 sigprocmask (SIG_SETMASK, &osig, 0); 176 sigprocmask (SIG_SETMASK, &osig, 0);
153 177
154# elif CORO_LOOSE 178# elif CORO_LOSER
155 179
156 setjmp (ctx->env); 180 setjmp (ctx->env);
157 ctx->env[7] = (int)((char *)sptr + ssize); 181 ctx->env[7] = (long)((char *)sptr + ssize);
158 ctx->env[8] = (int)coro_init; 182 ctx->env[8] = (long)coro_init;
159 183
160# elif CORO_LINUX 184# elif CORO_LINUX
161 185
162 setjmp (ctx->env); 186 setjmp (ctx->env);
163#if defined(__GLIBC__) && defined(__GLIBC_MINOR__) \ 187#if defined(__GLIBC__) && defined(__GLIBC_MINOR__) \
164 && __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined(JB_PC) && defined(JB_SP) 188 && __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined(JB_PC) && defined(JB_SP)
165 ctx->env[0].__jmpbuf[JB_PC] = (int)coro_init; 189 ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init;
166 ctx->env[0].__jmpbuf[JB_SP] = (int)((char *)sptr + ssize); 190 ctx->env[0].__jmpbuf[JB_SP] = (long)STACK_ADJUST_PTR (sptr,ssize);
167#elif defined(__GLIBC__) && defined(__GLIBC_MINOR__) \ 191#elif defined(__GLIBC__) && defined(__GLIBC_MINOR__) \
168 && __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined(__mc68000__) 192 && __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined(__mc68000__)
169 ctx->env[0].__jmpbuf[0].__aregs[0] = (long int)coro_init; 193 ctx->env[0].__jmpbuf[0].__aregs[0] = (long int)coro_init;
170 ctx->env[0].__jmpbuf[0].__sp = (int *)((char *)sptr + ssize); 194 ctx->env[0].__jmpbuf[0].__sp = (int *)((char *)sptr + ssize);
171#elif defined(__GNU_LIBRARY__) && defined(__i386__) 195#elif defined(__GNU_LIBRARY__) && defined(__i386__)
172 ctx->env[0].__jmpbuf[0].__pc = (char *)coro_init; 196 ctx->env[0].__jmpbuf[0].__pc = (char *)coro_init;
173 ctx->env[0].__jmpbuf[0].__sp = (void *)((char *)sptr + ssize); 197 ctx->env[0].__jmpbuf[0].__sp = (void *)((char *)sptr + ssize);
198#elif defined(__GNU_LIBRARY__) && defined(__amd64__)
199 ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init;
200 ctx->env[0].__jmpbuf[JB_RSP] = (long)STACK_ADJUST_PTR (sptr,ssize);
174#else 201#else
175#error "Unsupported Linux (g)libc version and/or platform" 202#error "linux libc or architecture not supported"
176#endif 203#endif
204
205# elif CORO_IRIX
206
207 setjmp (ctx->env);
208 ctx->env[JB_PC] = (__uint64_t)coro_init;
209 ctx->env[JB_SP] = (__uint64_t)STACK_ADJUST_PTR (sptr,ssize);
177 210
178# endif 211# endif
179 212
180 coro_transfer ((coro_context *)create_coro, (coro_context *)new_coro); 213 coro_transfer ((coro_context *)create_coro, (coro_context *)new_coro);
181 214

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