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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 1.13 by root, Thu Mar 3 17:20:31 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
48
49#if CORO_SJLJ || CORO_LOOSE || CORO_LINUX || CORO_IRIX
36 50
37#include <signal.h> 51#include <signal.h>
38 52
39static volatile coro_func coro_init_func; 53static volatile coro_func coro_init_func;
40static volatile void *coro_init_arg; 54static volatile void *coro_init_arg;
… …
44coro_init (void) 58coro_init (void)
45{ 59{
46 volatile coro_func func = coro_init_func; 60 volatile coro_func func = coro_init_func;
47 volatile void *arg = coro_init_arg; 61 volatile void *arg = coro_init_arg;
48 62
49 coro_transfer (new_coro, create_coro); 63 coro_transfer ((coro_context *)new_coro, (coro_context *)create_coro);
50 64
51 func (arg); 65 func ((void *)arg);
52 66
53 /* the new coro returned. bad. just abort() for now */ 67 /* the new coro returned. bad. just abort() for now */
54 abort (); 68 abort ();
55} 69}
56 70
57# if CORO_SJLJ 71# if CORO_SJLJ
58# define coro_save(ctx) (void)setjmp((ctx)->env)
59 72
60static volatile int trampoline_count; 73static volatile int trampoline_count;
61 74
62/* trampoline signal handler */ 75/* trampoline signal handler */
63static void 76static void
64trampoline(int sig) 77trampoline(int sig)
65{ 78{
66 if (setjmp (&(new_coro->env))) 79 if (setjmp (((coro_context *)new_coro)->env))
67 coro_init (); /* start it */ 80 coro_init (); /* start it */
68 else 81 else
69 trampoline_count++; 82 trampoline_count++;
70} 83}
71 84
72# endif 85# endif
73 86
74#elif CORO_UCONTEXT
75# define coro_save(ctx) getcontext(&((ctx)->uc))
76#endif 87#endif
77 88
78/* initialize a machine state */ 89/* initialize a machine state */
79void coro_create(coro_context *ctx, 90void coro_create(coro_context *ctx,
80 coro_func coro, void *arg, 91 coro_func coro, void *arg,
… …
82{ 93{
83#if CORO_UCONTEXT 94#if CORO_UCONTEXT
84 95
85 getcontext (&(ctx->uc)); 96 getcontext (&(ctx->uc));
86 97
87 ctx->uc.uc_link = 0; 98 ctx->uc.uc_link = 0;
88 ctx->uc.uc_stack.ss_sp = sptr; 99 ctx->uc.uc_stack.ss_sp = STACK_ADJUST_PTR (sptr,ssize);
89 ctx->uc.uc_stack.ss_size = (size_t) ssize; 100 ctx->uc.uc_stack.ss_size = (size_t) STACK_ADJUST_SIZE (sptr,ssize);
90 ctx->uc.uc_stack.ss_flags = 0; 101 ctx->uc.uc_stack.ss_flags = 0;
91 102
92 makecontext (&(ctx->uc), (void (*)()) coro, 1, arg); 103 makecontext (&(ctx->uc), (void (*)()) coro, 1, arg);
93 104
94#elif CORO_SJLJ || CORO_LOOSE 105#elif CORO_SJLJ || CORO_LOOSE || CORO_LINUX || CORO_IRIX
95 106
96# if CORO_SJLJ 107# if CORO_SJLJ
97 stack_t ostk, nstk; 108 stack_t ostk, nstk;
98 struct sigaction osa, nsa; 109 struct sigaction osa, nsa;
99 sigset_t nsig, osig; 110 sigset_t nsig, osig;
… …
119 130
120 if (sigaction (SIGUSR2, &nsa, &osa)) 131 if (sigaction (SIGUSR2, &nsa, &osa))
121 perror ("sigaction"); 132 perror ("sigaction");
122 133
123 /* set the new stack */ 134 /* set the new stack */
124 nstk.ss_sp = sptr; 135 nstk.ss_sp = STACK_ADJUST_PTR (sptr,ssize); /* yes, some platforms (IRIX) get this wrong. */
125 nstk.ss_size = ssize; 136 nstk.ss_size = STACK_ADJUST_SIZE (sptr,ssize);
126 nstk.ss_flags = 0; 137 nstk.ss_flags = 0;
127 138
128 if (sigaltstack (&nstk, &ostk) < 0) 139 if (sigaltstack (&nstk, &ostk) < 0)
129 perror ("sigaltstack"); 140 perror ("sigaltstack");
130 141
… …
149 160
150 sigaction (SIGUSR1, &osa, 0); 161 sigaction (SIGUSR1, &osa, 0);
151 162
152 sigprocmask (SIG_SETMASK, &osig, 0); 163 sigprocmask (SIG_SETMASK, &osig, 0);
153 164
154# elif MS_LOOSE 165# elif CORO_LOOSE
155 166
156 coro_save (ctx); 167 setjmp (ctx->env);
157 ctx->env[7] = (int)((char *)sptr + ssize); 168 ctx->env[7] = (long)((char *)sptr + ssize);
158 ctx->env[8] = (int)coro; 169 ctx->env[8] = (long)coro_init;
159 170
171# elif CORO_LINUX
172
173 setjmp (ctx->env);
174#if defined(__GLIBC__) && defined(__GLIBC_MINOR__) \
175 && __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined(JB_PC) && defined(JB_SP)
176 ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init;
177 ctx->env[0].__jmpbuf[JB_SP] = (long)STACK_ADJUST_PTR (sptr,ssize);
178#elif defined(__GLIBC__) && defined(__GLIBC_MINOR__) \
179 && __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined(__mc68000__)
180 ctx->env[0].__jmpbuf[0].__aregs[0] = (long int)coro_init;
181 ctx->env[0].__jmpbuf[0].__sp = (int *)((char *)sptr + ssize);
182#elif defined(__GNU_LIBRARY__) && defined(__i386__)
183 ctx->env[0].__jmpbuf[0].__pc = (char *)coro_init;
184 ctx->env[0].__jmpbuf[0].__sp = (void *)((char *)sptr + ssize);
185#elif defined(__GNU_LIBRARY__) && defined(__amd64__)
186 ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init;
187 ctx->env[0].__jmpbuf[JB_RSP] = (long)((char *)sptr + ssize);
188#else
189#error "linux libc or architecture not supported"
160# endif 190#endif
161 191
162 coro_transfer (create_coro, new_coro); 192# elif CORO_IRIX
193
194 setjmp (ctx->env);
195 ctx->env[JB_PC] = (__uint64_t)coro_init;
196 ctx->env[JB_SP] = (__uint64_t)STACK_ADJUST_PTR (sptr,ssize);
197
198# endif
199
200 coro_transfer ((coro_context *)create_coro, (coro_context *)new_coro);
163 201
164#else 202#else
165error unsupported architecture 203error unsupported architecture
166#endif 204#endif
167} 205}

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