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Comparing libcoro/coro.c (file contents):
Revision 1.2 by root, Mon Jul 23 22:09:39 2001 UTC vs.
Revision 1.14 by root, Mon Mar 21 14:17:44 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_LOOSE || CORO_LINUX || CORO_IRIX
50
51#if CORO_SJLJ
37#include <signal.h> 52# include <signal.h>
53#endif
38 54
39static volatile coro_func coro_init_func; 55static volatile coro_func coro_init_func;
40static volatile void *coro_init_arg; 56static volatile void *coro_init_arg;
41static volatile coro_context *new_coro, *create_coro; 57static volatile coro_context *new_coro, *create_coro;
42 58
… …
46 volatile coro_func func = coro_init_func; 62 volatile coro_func func = coro_init_func;
47 volatile void *arg = coro_init_arg; 63 volatile void *arg = coro_init_arg;
48 64
49 coro_transfer ((coro_context *)new_coro, (coro_context *)create_coro); 65 coro_transfer ((coro_context *)new_coro, (coro_context *)create_coro);
50 66
51 func (arg); 67 func ((void *)arg);
52 68
53 /* the new coro returned. bad. just abort() for now */ 69 /* the new coro returned. bad. just abort() for now */
54 abort (); 70 abort ();
55} 71}
56 72
57# if CORO_SJLJ 73# if CORO_SJLJ
58# define coro_save(ctx) (void)setjmp((ctx)->env)
59 74
60static volatile int trampoline_count; 75static volatile int trampoline_count;
61 76
62/* trampoline signal handler */ 77/* trampoline signal handler */
63static void 78static void
64trampoline(int sig) 79trampoline (int sig)
65{ 80{
66 if (setjmp (&(((coro_context *)new_coro)->env))) 81 if (setjmp (((coro_context *)new_coro)->env))
67 coro_init (); /* start it */ 82 coro_init (); /* start it */
68 else 83 else
69 trampoline_count++; 84 trampoline_count++;
70} 85}
71 86
72# endif 87# endif
73 88
74#elif CORO_UCONTEXT
75# define coro_save(ctx) getcontext(&((ctx)->uc))
76#endif 89#endif
77 90
78/* initialize a machine state */ 91/* initialize a machine state */
79void coro_create(coro_context *ctx, 92void coro_create(coro_context *ctx,
80 coro_func coro, void *arg, 93 coro_func coro, void *arg,
… …
82{ 95{
83#if CORO_UCONTEXT 96#if CORO_UCONTEXT
84 97
85 getcontext (&(ctx->uc)); 98 getcontext (&(ctx->uc));
86 99
87 ctx->uc.uc_link = 0; 100 ctx->uc.uc_link = 0;
88 ctx->uc.uc_stack.ss_sp = sptr; 101 ctx->uc.uc_stack.ss_sp = STACK_ADJUST_PTR (sptr,ssize);
89 ctx->uc.uc_stack.ss_size = (size_t) ssize; 102 ctx->uc.uc_stack.ss_size = (size_t) STACK_ADJUST_SIZE (sptr,ssize);
90 ctx->uc.uc_stack.ss_flags = 0; 103 ctx->uc.uc_stack.ss_flags = 0;
91 104
92 makecontext (&(ctx->uc), (void (*)()) coro, 1, arg); 105 makecontext (&(ctx->uc), (void (*)()) coro, 1, arg);
93 106
94#elif CORO_SJLJ || CORO_LOOSE 107#elif CORO_SJLJ || CORO_LOOSE || CORO_LINUX || CORO_IRIX
95 108
96# if CORO_SJLJ 109# if CORO_SJLJ
97 stack_t ostk, nstk; 110 stack_t ostk, nstk;
98 struct sigaction osa, nsa; 111 struct sigaction osa, nsa;
99 sigset_t nsig, osig; 112 sigset_t nsig, osig;
… …
119 132
120 if (sigaction (SIGUSR2, &nsa, &osa)) 133 if (sigaction (SIGUSR2, &nsa, &osa))
121 perror ("sigaction"); 134 perror ("sigaction");
122 135
123 /* set the new stack */ 136 /* set the new stack */
124 nstk.ss_sp = sptr; 137 nstk.ss_sp = STACK_ADJUST_PTR (sptr,ssize); /* yes, some platforms (IRIX) get this wrong. */
125 nstk.ss_size = ssize; 138 nstk.ss_size = STACK_ADJUST_SIZE (sptr,ssize);
126 nstk.ss_flags = 0; 139 nstk.ss_flags = 0;
127 140
128 if (sigaltstack (&nstk, &ostk) < 0) 141 if (sigaltstack (&nstk, &ostk) < 0)
129 perror ("sigaltstack"); 142 perror ("sigaltstack");
130 143
… …
149 162
150 sigaction (SIGUSR1, &osa, 0); 163 sigaction (SIGUSR1, &osa, 0);
151 164
152 sigprocmask (SIG_SETMASK, &osig, 0); 165 sigprocmask (SIG_SETMASK, &osig, 0);
153 166
154# elif MS_LOOSE 167# elif CORO_LOOSE
155 168
156 coro_save (ctx); 169 setjmp (ctx->env);
157 ctx->env[7] = (int)((char *)sptr + ssize); 170 ctx->env[7] = (long)((char *)sptr + ssize);
158 ctx->env[8] = (int)coro; 171 ctx->env[8] = (long)coro_init;
172
173# elif CORO_LINUX
174
175 setjmp (ctx->env);
176#if defined(__GLIBC__) && defined(__GLIBC_MINOR__) \
177 && __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined(JB_PC) && defined(JB_SP)
178 ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init;
179 ctx->env[0].__jmpbuf[JB_SP] = (long)STACK_ADJUST_PTR (sptr,ssize);
180#elif defined(__GLIBC__) && defined(__GLIBC_MINOR__) \
181 && __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined(__mc68000__)
182 ctx->env[0].__jmpbuf[0].__aregs[0] = (long int)coro_init;
183 ctx->env[0].__jmpbuf[0].__sp = (int *)((char *)sptr + ssize);
184#elif defined(__GNU_LIBRARY__) && defined(__i386__)
185 ctx->env[0].__jmpbuf[0].__pc = (char *)coro_init;
186 ctx->env[0].__jmpbuf[0].__sp = (void *)((char *)sptr + ssize);
187#elif defined(__GNU_LIBRARY__) && defined(__amd64__)
188 ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init;
189 ctx->env[0].__jmpbuf[JB_RSP] = (long)((char *)sptr + ssize);
190#else
191#error "linux libc or architecture not supported"
192#endif
193
194# elif CORO_IRIX
195
196 setjmp (ctx->env);
197 ctx->env[JB_PC] = (__uint64_t)coro_init;
198 ctx->env[JB_SP] = (__uint64_t)STACK_ADJUST_PTR (sptr,ssize);
159 199
160# endif 200# endif
161 201
162 coro_transfer ((coro_context *)create_coro, (coro_context *)new_coro); 202 coro_transfer ((coro_context *)create_coro, (coro_context *)new_coro);
163 203

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