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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 1.16 by root, Sat Aug 20 01:03:31 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 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#if CORO_SJLJ
52# include <stdio.h>
37#include <signal.h> 53# include <signal.h>
54#endif
38 55
39static volatile coro_func coro_init_func; 56static volatile coro_func coro_init_func;
40static volatile void *coro_init_arg; 57static volatile void *coro_init_arg;
41static volatile coro_context *new_coro, *create_coro; 58static volatile coro_context *new_coro, *create_coro;
42 59
… …
53 /* the new coro returned. bad. just abort() for now */ 70 /* the new coro returned. bad. just abort() for now */
54 abort (); 71 abort ();
55} 72}
56 73
57# if CORO_SJLJ 74# if CORO_SJLJ
58# define coro_save(ctx) (void)setjmp((ctx)->env)
59 75
60static volatile int trampoline_count; 76static volatile int trampoline_count;
61 77
62/* trampoline signal handler */ 78/* trampoline signal handler */
63static void 79static void
64trampoline(int sig) 80trampoline (int sig)
65{ 81{
66 if (setjmp (((coro_context *)new_coro)->env)) 82 if (setjmp (((coro_context *)new_coro)->env))
67 coro_init (); /* start it */ 83 coro_init (); /* start it */
68 else 84 else
69 trampoline_count++; 85 trampoline_count++;
70} 86}
71 87
72# endif 88# endif
73 89
74#elif CORO_UCONTEXT
75# define coro_save(ctx) getcontext(&((ctx)->uc))
76#endif 90#endif
77 91
78/* initialize a machine state */ 92/* initialize a machine state */
79void coro_create(coro_context *ctx, 93void coro_create(coro_context *ctx,
80 coro_func coro, void *arg, 94 coro_func coro, void *arg,
… …
82{ 96{
83#if CORO_UCONTEXT 97#if CORO_UCONTEXT
84 98
85 getcontext (&(ctx->uc)); 99 getcontext (&(ctx->uc));
86 100
87 ctx->uc.uc_link = 0; 101 ctx->uc.uc_link = 0;
88 ctx->uc.uc_stack.ss_sp = sptr; 102 ctx->uc.uc_stack.ss_sp = STACK_ADJUST_PTR (sptr,ssize);
89 ctx->uc.uc_stack.ss_size = (size_t) ssize; 103 ctx->uc.uc_stack.ss_size = (size_t) STACK_ADJUST_SIZE (sptr,ssize);
90 ctx->uc.uc_stack.ss_flags = 0; 104 ctx->uc.uc_stack.ss_flags = 0;
91 105
92 makecontext (&(ctx->uc), (void (*)()) coro, 1, arg); 106 makecontext (&(ctx->uc), (void (*)()) coro, 1, arg);
93 107
94#elif CORO_SJLJ || CORO_LOOSE 108#elif CORO_SJLJ || CORO_LOSER || CORO_LINUX || CORO_IRIX
95 109
96# if CORO_SJLJ 110# if CORO_SJLJ
97 stack_t ostk, nstk; 111 stack_t ostk, nstk;
98 struct sigaction osa, nsa; 112 struct sigaction osa, nsa;
99 sigset_t nsig, osig; 113 sigset_t nsig, osig;
… …
119 133
120 if (sigaction (SIGUSR2, &nsa, &osa)) 134 if (sigaction (SIGUSR2, &nsa, &osa))
121 perror ("sigaction"); 135 perror ("sigaction");
122 136
123 /* set the new stack */ 137 /* set the new stack */
124 nstk.ss_sp = sptr; 138 nstk.ss_sp = STACK_ADJUST_PTR (sptr,ssize); /* yes, some platforms (IRIX) get this wrong. */
125 nstk.ss_size = ssize; 139 nstk.ss_size = STACK_ADJUST_SIZE (sptr,ssize);
126 nstk.ss_flags = 0; 140 nstk.ss_flags = 0;
127 141
128 if (sigaltstack (&nstk, &ostk) < 0) 142 if (sigaltstack (&nstk, &ostk) < 0)
129 perror ("sigaltstack"); 143 perror ("sigaltstack");
130 144
… …
149 163
150 sigaction (SIGUSR1, &osa, 0); 164 sigaction (SIGUSR1, &osa, 0);
151 165
152 sigprocmask (SIG_SETMASK, &osig, 0); 166 sigprocmask (SIG_SETMASK, &osig, 0);
153 167
154# elif MS_LOOSE 168# elif CORO_LOSER
155 169
156 coro_save (ctx); 170 setjmp (ctx->env);
157 ctx->env[7] = (int)((char *)sptr + ssize); 171 ctx->env[7] = (long)((char *)sptr + ssize);
158 ctx->env[8] = (int)coro; 172 ctx->env[8] = (long)coro_init;
173
174# elif CORO_LINUX
175
176 setjmp (ctx->env);
177#if defined(__GLIBC__) && defined(__GLIBC_MINOR__) \
178 && __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined(JB_PC) && defined(JB_SP)
179 ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init;
180 ctx->env[0].__jmpbuf[JB_SP] = (long)STACK_ADJUST_PTR (sptr,ssize);
181#elif defined(__GLIBC__) && defined(__GLIBC_MINOR__) \
182 && __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined(__mc68000__)
183 ctx->env[0].__jmpbuf[0].__aregs[0] = (long int)coro_init;
184 ctx->env[0].__jmpbuf[0].__sp = (int *)((char *)sptr + ssize);
185#elif defined(__GNU_LIBRARY__) && defined(__i386__)
186 ctx->env[0].__jmpbuf[0].__pc = (char *)coro_init;
187 ctx->env[0].__jmpbuf[0].__sp = (void *)((char *)sptr + ssize);
188#elif defined(__GNU_LIBRARY__) && defined(__amd64__)
189 ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init;
190 ctx->env[0].__jmpbuf[JB_RSP] = (long)((char *)sptr + ssize);
191#else
192#error "linux libc or architecture not supported"
193#endif
194
195# elif CORO_IRIX
196
197 setjmp (ctx->env);
198 ctx->env[JB_PC] = (__uint64_t)coro_init;
199 ctx->env[JB_SP] = (__uint64_t)STACK_ADJUST_PTR (sptr,ssize);
159 200
160# endif 201# endif
161 202
162 coro_transfer ((coro_context *)create_coro, (coro_context *)new_coro); 203 coro_transfer ((coro_context *)create_coro, (coro_context *)new_coro);
163 204

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