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Comparing libcoro/coro.c (file contents):
Revision 1.7 by root, Mon Sep 3 03:42:13 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 !defined(STACK_ADJUST_PTR)
35/* IRIX is decidedly NON-unix */ 36/* IRIX is decidedly NON-unix */
36#if __sgi 37# if __sgi
37# define STACK_ADJUST(sp,ss) ((char *)(sp) + (ss) - 8) 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)
38#else 46# else
39# define STACK_ADJUST(sp,ss) (sp) 47# define STACK_ADJUST_PTR(sp,ss) (sp)
48# define STACK_ADJUST_SIZE(sp,ss) (ss)
40#endif 49# endif
50#endif
41 51
52#if CORO_UCONTEXT
53# include <stddef.h>
54#endif
55
42#if CORO_SJLJ || CORO_LOOSE || CORO_LINUX || CORO_IRIX 56#if CORO_SJLJ || CORO_LOSER || CORO_LINUX || CORO_IRIX
43 57
58#include <stdlib.h>
59
60#if CORO_SJLJ
61# include <stdio.h>
44#include <signal.h> 62# include <signal.h>
63# include <unistd.h>
64#endif
45 65
46static volatile coro_func coro_init_func; 66static volatile coro_func coro_init_func;
47static volatile void *coro_init_arg; 67static volatile void *coro_init_arg;
48static 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
49 75
50static void 76static void
51coro_init (void) 77coro_init (void)
52{ 78{
53 volatile coro_func func = coro_init_func; 79 volatile coro_func func = coro_init_func;
65 91
66static volatile int trampoline_count; 92static volatile int trampoline_count;
67 93
68/* trampoline signal handler */ 94/* trampoline signal handler */
69static void 95static void
70trampoline(int sig) 96trampoline (int sig)
71{ 97{
72 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
73 coro_init (); /* start it */ 103 coro_init (); /* start it */
104#if HAVE_CFI
105 asm (".cfi_endproc");
106#endif
107 }
74 else 108 else
75 trampoline_count++; 109 trampoline_count++;
76} 110}
77 111
78# endif 112# endif
79 113
80#endif 114#endif
81 115
82/* initialize a machine state */ 116/* initialize a machine state */
83void coro_create(coro_context *ctx, 117void coro_create (coro_context *ctx,
84 coro_func coro, void *arg, 118 coro_func coro, void *arg,
85 void *sptr, long ssize) 119 void *sptr, long ssize)
86{ 120{
87#if CORO_UCONTEXT 121#if CORO_UCONTEXT
88 122
89 getcontext (&(ctx->uc)); 123 getcontext (&(ctx->uc));
90 124
91 ctx->uc.uc_link = 0; 125 ctx->uc.uc_link = 0;
92 ctx->uc.uc_stack.ss_sp = STACK_ADJUST(sptr,ssize); 126 ctx->uc.uc_stack.ss_sp = STACK_ADJUST_PTR (sptr,ssize);
93 ctx->uc.uc_stack.ss_size = (size_t) ssize; 127 ctx->uc.uc_stack.ss_size = (size_t) STACK_ADJUST_SIZE (sptr,ssize);
94 ctx->uc.uc_stack.ss_flags = 0; 128 ctx->uc.uc_stack.ss_flags = 0;
95 129
96 makecontext (&(ctx->uc), (void (*)()) coro, 1, arg); 130 makecontext (&(ctx->uc), (void (*)()) coro, 1, arg);
97 131
98#elif CORO_SJLJ || CORO_LOOSE || CORO_LINUX || CORO_IRIX 132#elif CORO_SJLJ || CORO_LOSER || CORO_LINUX || CORO_IRIX
99 133
100# if CORO_SJLJ 134# if CORO_SJLJ
101 stack_t ostk, nstk; 135 stack_t ostk, nstk;
102 struct sigaction osa, nsa; 136 struct sigaction osa, nsa;
103 sigset_t nsig, osig; 137 sigset_t nsig, osig;
120 nsa.sa_handler = trampoline; 154 nsa.sa_handler = trampoline;
121 sigemptyset (&nsa.sa_mask); 155 sigemptyset (&nsa.sa_mask);
122 nsa.sa_flags = SA_ONSTACK; 156 nsa.sa_flags = SA_ONSTACK;
123 157
124 if (sigaction (SIGUSR2, &nsa, &osa)) 158 if (sigaction (SIGUSR2, &nsa, &osa))
159 {
125 perror ("sigaction"); 160 perror ("sigaction");
161 abort ();
162 }
126 163
127 /* set the new stack */ 164 /* set the new stack */
128 nstk.ss_sp = STACK_ADJUST(sptr,ssize); /* yes, some platforms (IRIX) get this wrong. */ 165 nstk.ss_sp = STACK_ADJUST_PTR (sptr,ssize); /* yes, some platforms (IRIX) get this wrong. */
129 nstk.ss_size = ssize; 166 nstk.ss_size = STACK_ADJUST_SIZE (sptr,ssize);
130 nstk.ss_flags = 0; 167 nstk.ss_flags = 0;
131 168
132 if (sigaltstack (&nstk, &ostk) < 0) 169 if (sigaltstack (&nstk, &ostk) < 0)
170 {
133 perror ("sigaltstack"); 171 perror ("sigaltstack");
172 abort ();
173 }
134 174
135 trampoline_count = 0; 175 trampoline_count = 0;
136 kill (getpid (), SIGUSR2); 176 kill (getpid (), SIGUSR2);
137 sigfillset (&nsig); sigdelset (&nsig, SIGUSR2); 177 sigfillset (&nsig); sigdelset (&nsig, SIGUSR2);
138 178
149 abort (); 189 abort ();
150 190
151 if (~ostk.ss_flags & SS_DISABLE) 191 if (~ostk.ss_flags & SS_DISABLE)
152 sigaltstack (&ostk, 0); 192 sigaltstack (&ostk, 0);
153 193
154 sigaction (SIGUSR1, &osa, 0); 194 sigaction (SIGUSR2, &osa, 0);
155 195
156 sigprocmask (SIG_SETMASK, &osig, 0); 196 sigprocmask (SIG_SETMASK, &osig, 0);
157 197
158# elif CORO_LOOSE 198# elif CORO_LOSER
159 199
160 setjmp (ctx->env); 200 setjmp (ctx->env);
201#if __CYGWIN__
161 ctx->env[7] = (int)((char *)sptr + ssize); 202 ctx->env[7] = (long)((char *)sptr + ssize);
162 ctx->env[8] = (int)coro_init; 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
163 216
164# elif CORO_LINUX 217# elif CORO_LINUX
165 218
166 setjmp (ctx->env); 219 _setjmp (ctx->env);
167#if defined(__GLIBC__) && defined(__GLIBC_MINOR__) \
168 && __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined(JB_PC) && defined(JB_SP) 220#if __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (JB_PC) && defined (JB_SP)
169 ctx->env[0].__jmpbuf[JB_PC] = (int)coro_init; 221 ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init;
170 ctx->env[0].__jmpbuf[JB_SP] = (int)((char *)sptr + ssize); 222 ctx->env[0].__jmpbuf[JB_SP] = (long)STACK_ADJUST_PTR (sptr, ssize);
171#elif defined(__GLIBC__) && defined(__GLIBC_MINOR__) \
172 && __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined(__mc68000__) 223#elif __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (__mc68000__)
173 ctx->env[0].__jmpbuf[0].__aregs[0] = (long int)coro_init; 224 ctx->env[0].__jmpbuf[0].__aregs[0] = (long int)coro_init;
174 ctx->env[0].__jmpbuf[0].__sp = (int *)((char *)sptr + ssize); 225 ctx->env[0].__jmpbuf[0].__sp = (int *)((char *)sptr + ssize);
175#elif defined(__GNU_LIBRARY__) && defined(__i386__) 226#elif defined (__GNU_LIBRARY__) && defined (__i386__)
176 ctx->env[0].__jmpbuf[0].__pc = (char *)coro_init; 227 ctx->env[0].__jmpbuf[0].__pc = (char *)coro_init;
177 ctx->env[0].__jmpbuf[0].__sp = (void *)((char *)sptr + ssize); 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);
178#else 232#else
179#error "linux libc or architecture not supported" 233#error "linux libc or architecture not supported"
180#endif 234#endif
181 235
182# elif CORO_IRIX 236# elif CORO_IRIX
183 237
184 setjmp (ctx->env); 238 setjmp (ctx->env);
185 ctx->env[JB_PC] = (__uint64_t)coro_init; 239 ctx->env[JB_PC] = (__uint64_t)coro_init;
186 ctx->env[JB_SP] = (__uint64_t)STACK_ADJUST(sptr,ssize); 240 ctx->env[JB_SP] = (__uint64_t)STACK_ADJUST_PTR (sptr, ssize);
187 241
188# endif 242# endif
189 243
190 coro_transfer ((coro_context *)create_coro, (coro_context *)new_coro); 244 coro_transfer ((coro_context *)create_coro, (coro_context *)new_coro);
191 245

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