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Comparing libcoro/coro.c (file contents):
Revision 1.1 by root, Mon Jul 23 17:13:08 2001 UTC vs.
Revision 1.19 by root, Wed Oct 19 19:04:24 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# 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_SJLJ || CORO_LOSER || CORO_LINUX || CORO_IRIX
53
54#include <stdlib.h>
55
56#if CORO_SJLJ
57# include <stdio.h>
37#include <signal.h> 58# include <signal.h>
59# include <unistd.h>
60#endif
38 61
39static volatile coro_func coro_init_func; 62static volatile coro_func coro_init_func;
40static volatile void *coro_init_arg; 63static volatile void *coro_init_arg;
41static volatile coro_context *new_coro, *create_coro; 64static volatile coro_context *new_coro, *create_coro;
42 65
… …
44coro_init (void) 67coro_init (void)
45{ 68{
46 volatile coro_func func = coro_init_func; 69 volatile coro_func func = coro_init_func;
47 volatile void *arg = coro_init_arg; 70 volatile void *arg = coro_init_arg;
48 71
49 coro_transfer (new_coro, create_coro); 72 coro_transfer ((coro_context *)new_coro, (coro_context *)create_coro);
50 73
51 func (arg); 74 func ((void *)arg);
52 75
53 /* the new coro returned. bad. just abort() for now */ 76 /* the new coro returned. bad. just abort() for now */
54 abort (); 77 abort ();
55} 78}
56 79
57# if CORO_SJLJ 80# if CORO_SJLJ
58# define coro_save(ctx) (void)setjmp((ctx)->env)
59 81
60static volatile int trampoline_count; 82static volatile int trampoline_count;
61 83
62/* trampoline signal handler */ 84/* trampoline signal handler */
63static void 85static void
64trampoline(int sig) 86trampoline (int sig)
65{ 87{
66 if (setjmp (&(new_coro->env))) 88 if (setjmp (((coro_context *)new_coro)->env))
67 coro_init (); /* start it */ 89 coro_init (); /* start it */
68 else 90 else
69 trampoline_count++; 91 trampoline_count++;
70} 92}
71 93
72# endif 94# endif
73 95
74#elif CORO_UCONTEXT
75# define coro_save(ctx) getcontext(&((ctx)->uc))
76#endif 96#endif
77 97
78/* initialize a machine state */ 98/* initialize a machine state */
79void coro_create(coro_context *ctx, 99void coro_create(coro_context *ctx,
80 coro_func coro, void *arg, 100 coro_func coro, void *arg,
… …
82{ 102{
83#if CORO_UCONTEXT 103#if CORO_UCONTEXT
84 104
85 getcontext (&(ctx->uc)); 105 getcontext (&(ctx->uc));
86 106
87 ctx->uc.uc_link = 0; 107 ctx->uc.uc_link = 0;
88 ctx->uc.uc_stack.ss_sp = sptr; 108 ctx->uc.uc_stack.ss_sp = STACK_ADJUST_PTR (sptr,ssize);
89 ctx->uc.uc_stack.ss_size = (size_t) ssize; 109 ctx->uc.uc_stack.ss_size = (size_t) STACK_ADJUST_SIZE (sptr,ssize);
90 ctx->uc.uc_stack.ss_flags = 0; 110 ctx->uc.uc_stack.ss_flags = 0;
91 111
92 makecontext (&(ctx->uc), (void (*)()) coro, 1, arg); 112 makecontext (&(ctx->uc), (void (*)()) coro, 1, arg);
93 113
94#elif CORO_SJLJ || CORO_LOOSE 114#elif CORO_SJLJ || CORO_LOSER || CORO_LINUX || CORO_IRIX
95 115
96# if CORO_SJLJ 116# if CORO_SJLJ
97 stack_t ostk, nstk; 117 stack_t ostk, nstk;
98 struct sigaction osa, nsa; 118 struct sigaction osa, nsa;
99 sigset_t nsig, osig; 119 sigset_t nsig, osig;
… …
119 139
120 if (sigaction (SIGUSR2, &nsa, &osa)) 140 if (sigaction (SIGUSR2, &nsa, &osa))
121 perror ("sigaction"); 141 perror ("sigaction");
122 142
123 /* set the new stack */ 143 /* set the new stack */
124 nstk.ss_sp = sptr; 144 nstk.ss_sp = STACK_ADJUST_PTR (sptr,ssize); /* yes, some platforms (IRIX) get this wrong. */
125 nstk.ss_size = ssize; 145 nstk.ss_size = STACK_ADJUST_SIZE (sptr,ssize);
126 nstk.ss_flags = 0; 146 nstk.ss_flags = 0;
127 147
128 if (sigaltstack (&nstk, &ostk) < 0) 148 if (sigaltstack (&nstk, &ostk) < 0)
129 perror ("sigaltstack"); 149 perror ("sigaltstack");
130 150
… …
145 abort (); 165 abort ();
146 166
147 if (~ostk.ss_flags & SS_DISABLE) 167 if (~ostk.ss_flags & SS_DISABLE)
148 sigaltstack (&ostk, 0); 168 sigaltstack (&ostk, 0);
149 169
150 sigaction (SIGUSR1, &osa, 0); 170 sigaction (SIGUSR2, &osa, 0);
151 171
152 sigprocmask (SIG_SETMASK, &osig, 0); 172 sigprocmask (SIG_SETMASK, &osig, 0);
153 173
154# elif MS_LOOSE 174# elif CORO_LOSER
155 175
156 coro_save (ctx); 176 setjmp (ctx->env);
157 ctx->env[7] = (int)((char *)sptr + ssize); 177 ctx->env[7] = (long)((char *)sptr + ssize);
158 ctx->env[8] = (int)coro; 178 ctx->env[8] = (long)coro_init;
159 179
180# elif CORO_LINUX
181
182 setjmp (ctx->env);
183#if defined(__GLIBC__) && defined(__GLIBC_MINOR__) \
184 && __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined(JB_PC) && defined(JB_SP)
185 ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init;
186 ctx->env[0].__jmpbuf[JB_SP] = (long)STACK_ADJUST_PTR (sptr,ssize);
187#elif defined(__GLIBC__) && defined(__GLIBC_MINOR__) \
188 && __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined(__mc68000__)
189 ctx->env[0].__jmpbuf[0].__aregs[0] = (long int)coro_init;
190 ctx->env[0].__jmpbuf[0].__sp = (int *)((char *)sptr + ssize);
191#elif defined(__GNU_LIBRARY__) && defined(__i386__)
192 ctx->env[0].__jmpbuf[0].__pc = (char *)coro_init;
193 ctx->env[0].__jmpbuf[0].__sp = (void *)((char *)sptr + ssize);
194#elif defined(__GNU_LIBRARY__) && defined(__amd64__)
195 ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init;
196 ctx->env[0].__jmpbuf[JB_RSP] = (long)STACK_ADJUST_PTR (sptr,ssize);
197#else
198#error "linux libc or architecture not supported"
160# endif 199#endif
161 200
162 coro_transfer (create_coro, new_coro); 201# elif CORO_IRIX
202
203 setjmp (ctx->env);
204 ctx->env[JB_PC] = (__uint64_t)coro_init;
205 ctx->env[JB_SP] = (__uint64_t)STACK_ADJUST_PTR (sptr,ssize);
206
207# endif
208
209 coro_transfer ((coro_context *)create_coro, (coro_context *)new_coro);
163 210
164#else 211#else
165error unsupported architecture 212error unsupported architecture
166#endif 213#endif
167} 214}

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