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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 1.26 by root, Fri Apr 27 19:35:28 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;
69
70/* what we really want to detect here is wether we use a new-enough version of GAS */
71/* instead, check for gcc 3 and ELF and hope for the best */
72#if __GNUC__ >= 3 && __ELF__
73# define HAVE_CFI 1
74#endif
42 75
43static void 76static void
44coro_init (void) 77coro_init (void)
45{ 78{
46 volatile coro_func func = coro_init_func; 79 volatile coro_func func = coro_init_func;
… …
53 /* the new coro returned. bad. just abort() for now */ 86 /* the new coro returned. bad. just abort() for now */
54 abort (); 87 abort ();
55} 88}
56 89
57# if CORO_SJLJ 90# if CORO_SJLJ
58# define coro_save(ctx) (void)setjmp((ctx)->env)
59 91
60static volatile int trampoline_count; 92static volatile int trampoline_count;
61 93
62/* trampoline signal handler */ 94/* trampoline signal handler */
63static void 95static void
64trampoline(int sig) 96trampoline (int sig)
65{ 97{
66 if (setjmp (((coro_context *)new_coro)->env)) 98 if (setjmp (((coro_context *)new_coro)->env))
99 {
100#if HAVE_CFI
101 asm (".cfi_startproc");
102#endif
67 coro_init (); /* start it */ 103 coro_init (); /* start it */
104#if HAVE_CFI
105 asm (".cfi_endproc");
106#endif
107 }
68 else 108 else
69 trampoline_count++; 109 trampoline_count++;
70} 110}
71 111
72# endif 112# endif
73 113
74#elif CORO_UCONTEXT
75# define coro_save(ctx) getcontext(&((ctx)->uc))
76#endif 114#endif
77 115
78/* initialize a machine state */ 116/* initialize a machine state */
79void coro_create(coro_context *ctx, 117void coro_create (coro_context *ctx,
80 coro_func coro, void *arg, 118 coro_func coro, void *arg,
81 void *sptr, long ssize) 119 void *sptr, long ssize)
82{ 120{
83#if CORO_UCONTEXT 121#if CORO_UCONTEXT
84 122
85 getcontext (&(ctx->uc)); 123 getcontext (&(ctx->uc));
86 124
87 ctx->uc.uc_link = 0; 125 ctx->uc.uc_link = 0;
88 ctx->uc.uc_stack.ss_sp = sptr; 126 ctx->uc.uc_stack.ss_sp = STACK_ADJUST_PTR (sptr,ssize);
89 ctx->uc.uc_stack.ss_size = (size_t) ssize; 127 ctx->uc.uc_stack.ss_size = (size_t) STACK_ADJUST_SIZE (sptr,ssize);
90 ctx->uc.uc_stack.ss_flags = 0; 128 ctx->uc.uc_stack.ss_flags = 0;
91 129
92 makecontext (&(ctx->uc), (void (*)()) coro, 1, arg); 130 makecontext (&(ctx->uc), (void (*)()) coro, 1, arg);
93 131
94#elif CORO_SJLJ || CORO_LOOSE 132#elif CORO_SJLJ || CORO_LOSER || CORO_LINUX || CORO_IRIX
95 133
96# if CORO_SJLJ 134# if CORO_SJLJ
97 stack_t ostk, nstk; 135 stack_t ostk, nstk;
98 struct sigaction osa, nsa; 136 struct sigaction osa, nsa;
99 sigset_t nsig, osig; 137 sigset_t nsig, osig;
… …
116 nsa.sa_handler = trampoline; 154 nsa.sa_handler = trampoline;
117 sigemptyset (&nsa.sa_mask); 155 sigemptyset (&nsa.sa_mask);
118 nsa.sa_flags = SA_ONSTACK; 156 nsa.sa_flags = SA_ONSTACK;
119 157
120 if (sigaction (SIGUSR2, &nsa, &osa)) 158 if (sigaction (SIGUSR2, &nsa, &osa))
159 {
121 perror ("sigaction"); 160 perror ("sigaction");
161 abort ();
162 }
122 163
123 /* set the new stack */ 164 /* set the new stack */
124 nstk.ss_sp = sptr; 165 nstk.ss_sp = STACK_ADJUST_PTR (sptr,ssize); /* yes, some platforms (IRIX) get this wrong. */
125 nstk.ss_size = ssize; 166 nstk.ss_size = STACK_ADJUST_SIZE (sptr,ssize);
126 nstk.ss_flags = 0; 167 nstk.ss_flags = 0;
127 168
128 if (sigaltstack (&nstk, &ostk) < 0) 169 if (sigaltstack (&nstk, &ostk) < 0)
170 {
129 perror ("sigaltstack"); 171 perror ("sigaltstack");
172 abort ();
173 }
130 174
131 trampoline_count = 0; 175 trampoline_count = 0;
132 kill (getpid (), SIGUSR2); 176 kill (getpid (), SIGUSR2);
133 sigfillset (&nsig); sigdelset (&nsig, SIGUSR2); 177 sigfillset (&nsig); sigdelset (&nsig, SIGUSR2);
134 178
… …
145 abort (); 189 abort ();
146 190
147 if (~ostk.ss_flags & SS_DISABLE) 191 if (~ostk.ss_flags & SS_DISABLE)
148 sigaltstack (&ostk, 0); 192 sigaltstack (&ostk, 0);
149 193
150 sigaction (SIGUSR1, &osa, 0); 194 sigaction (SIGUSR2, &osa, 0);
151 195
152 sigprocmask (SIG_SETMASK, &osig, 0); 196 sigprocmask (SIG_SETMASK, &osig, 0);
153 197
154# elif MS_LOOSE 198# elif CORO_LOSER
155 199
156 coro_save (ctx); 200 setjmp (ctx->env);
201#if __CYGWIN__
157 ctx->env[7] = (int)((char *)sptr + ssize); 202 ctx->env[7] = (long)((char *)sptr + ssize);
158 ctx->env[8] = (int)coro; 203 ctx->env[8] = (long)coro_init;
204#elif defined(_M_IX86)
205 ((_JUMP_BUFFER *)&ctx->env)->Eip = (long)coro_init;
206 ((_JUMP_BUFFER *)&ctx->env)->Esp = (long)STACK_ADJUST_PTR (sptr,ssize);
207#elif defined(_M_AMD64)
208 ((_JUMP_BUFFER *)&ctx->env)->Rip = (__int64)coro_init;
209 ((_JUMP_BUFFER *)&ctx->env)->Rsp = (__int64)STACK_ADJUST_PTR (sptr,ssize);
210#elif defined(_M_IA64)
211 ((_JUMP_BUFFER *)&ctx->env)->StIIP = (__int64)coro_init;
212 ((_JUMP_BUFFER *)&ctx->env)->IntSp = (__int64)STACK_ADJUST_PTR (sptr,ssize);
213#else
214#error "microsoft libc or architecture not supported"
215#endif
216
217# elif CORO_LINUX
218
219 _setjmp (ctx->env);
220#if __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (JB_PC) && defined (JB_SP)
221 ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init;
222 ctx->env[0].__jmpbuf[JB_SP] = (long)STACK_ADJUST_PTR (sptr, ssize);
223#elif __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (__mc68000__)
224 ctx->env[0].__jmpbuf[0].__aregs[0] = (long int)coro_init;
225 ctx->env[0].__jmpbuf[0].__sp = (int *)((char *)sptr + ssize);
226#elif defined (__GNU_LIBRARY__) && defined (__i386__)
227 ctx->env[0].__jmpbuf[0].__pc = (char *)coro_init;
228 ctx->env[0].__jmpbuf[0].__sp = (void *)((char *)sptr + ssize);
229#elif defined (__GNU_LIBRARY__) && defined (__amd64__)
230 ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init;
231 ctx->env[0].__jmpbuf[JB_RSP] = (long)STACK_ADJUST_PTR (sptr, ssize);
232#else
233#error "linux libc or architecture not supported"
234#endif
235
236# elif CORO_IRIX
237
238 setjmp (ctx->env);
239 ctx->env[JB_PC] = (__uint64_t)coro_init;
240 ctx->env[JB_SP] = (__uint64_t)STACK_ADJUST_PTR (sptr, ssize);
159 241
160# endif 242# endif
161 243
162 coro_transfer ((coro_context *)create_coro, (coro_context *)new_coro); 244 coro_transfer ((coro_context *)create_coro, (coro_context *)new_coro);
163 245

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