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Comparing libcoro/coro.c (file contents):
Revision 1.26 by root, Fri Apr 27 19:35:28 2007 UTC vs.
Revision 1.28 by root, Sun Jan 20 17:30:24 2008 UTC

1/* 1/*
2 * Copyright (c) 2001-2006 Marc Alexander Lehmann <schmorp@schmorp.de> 2 * Copyright (c) 2001-2008 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,
… …
51 51
52#if CORO_UCONTEXT 52#if CORO_UCONTEXT
53# include <stddef.h> 53# include <stddef.h>
54#endif 54#endif
55 55
56#if CORO_SJLJ || CORO_LOSER || CORO_LINUX || CORO_IRIX 56#if CORO_SJLJ || CORO_LOSER || CORO_LINUX || CORO_IRIX || CORO_ASM
57 57
58#include <stdlib.h> 58#include <stdlib.h>
59 59
60#if CORO_SJLJ 60#if CORO_SJLJ
61# include <stdio.h> 61# include <stdio.h>
… …
66static volatile coro_func coro_init_func; 66static volatile coro_func coro_init_func;
67static volatile void *coro_init_arg; 67static volatile void *coro_init_arg;
68static volatile coro_context *new_coro, *create_coro; 68static volatile coro_context *new_coro, *create_coro;
69 69
70/* what we really want to detect here is wether we use a new-enough version of GAS */ 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 */ 71/* instead, check for gcc 3, ELF and GNU/Linux and hope for the best */
72#if __GNUC__ >= 3 && __ELF__ 72#if __GNUC__ >= 3 && __ELF__ && __linux__
73# define HAVE_CFI 1 73# define HAVE_CFI 1
74#endif 74#endif
75 75
76static void 76static void
77coro_init (void) 77coro_init (void)
… …
111 111
112# endif 112# endif
113 113
114#endif 114#endif
115 115
116#if CORO_ASM
117void __attribute__((__noinline__, __fastcall__))
118coro_transfer (struct coro_context *prev, struct coro_context *next)
119{
120 asm volatile (
121#if __amd64
122# define NUM_CLOBBERED 5
123 "push %%rbx\n\t"
124 "push %%r12\n\t"
125 "push %%r13\n\t"
126 "push %%r14\n\t"
127 "push %%r15\n\t"
128 "mov %%rsp, %0\n\t"
129 "mov %1, %%rsp\n\t"
130 "pop %%r15\n\t"
131 "pop %%r14\n\t"
132 "pop %%r13\n\t"
133 "pop %%r12\n\t"
134 "pop %%rbx\n\t"
135#elif __i386
136# define NUM_CLOBBERED 4
137 "push %%ebx\n\t"
138 "push %%esi\n\t"
139 "push %%edi\n\t"
140 "push %%ebp\n\t"
141 "mov %%esp, %0\n\t"
142 "mov %1, %%esp\n\t"
143 "pop %%ebp\n\t"
144 "pop %%edi\n\t"
145 "pop %%esi\n\t"
146 "pop %%ebx\n\t"
147#else
148# error unsupported architecture
149#endif
150 : "=m" (prev->sp)
151 : "m" (next->sp)
152 );
153}
154#endif
155
116/* initialize a machine state */ 156/* initialize a machine state */
117void coro_create (coro_context *ctx, 157void coro_create (coro_context *ctx,
118 coro_func coro, void *arg, 158 coro_func coro, void *arg,
119 void *sptr, long ssize) 159 void *sptr, long ssize)
120{ 160{
… …
127 ctx->uc.uc_stack.ss_size = (size_t) STACK_ADJUST_SIZE (sptr,ssize); 167 ctx->uc.uc_stack.ss_size = (size_t) STACK_ADJUST_SIZE (sptr,ssize);
128 ctx->uc.uc_stack.ss_flags = 0; 168 ctx->uc.uc_stack.ss_flags = 0;
129 169
130 makecontext (&(ctx->uc), (void (*)()) coro, 1, arg); 170 makecontext (&(ctx->uc), (void (*)()) coro, 1, arg);
131 171
132#elif CORO_SJLJ || CORO_LOSER || CORO_LINUX || CORO_IRIX 172#elif CORO_SJLJ || CORO_LOSER || CORO_LINUX || CORO_IRIX || CORO_ASM
133 173
134# if CORO_SJLJ 174# if CORO_SJLJ
135 stack_t ostk, nstk; 175 stack_t ostk, nstk;
136 struct sigaction osa, nsa; 176 struct sigaction osa, nsa;
137 sigset_t nsig, osig; 177 sigset_t nsig, osig;
… …
228 ctx->env[0].__jmpbuf[0].__sp = (void *)((char *)sptr + ssize); 268 ctx->env[0].__jmpbuf[0].__sp = (void *)((char *)sptr + ssize);
229#elif defined (__GNU_LIBRARY__) && defined (__amd64__) 269#elif defined (__GNU_LIBRARY__) && defined (__amd64__)
230 ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init; 270 ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init;
231 ctx->env[0].__jmpbuf[JB_RSP] = (long)STACK_ADJUST_PTR (sptr, ssize); 271 ctx->env[0].__jmpbuf[JB_RSP] = (long)STACK_ADJUST_PTR (sptr, ssize);
232#else 272#else
233#error "linux libc or architecture not supported" 273# error "linux libc or architecture not supported"
234#endif 274#endif
235 275
236# elif CORO_IRIX 276# elif CORO_IRIX
237 277
238 setjmp (ctx->env); 278 setjmp (ctx->env);
239 ctx->env[JB_PC] = (__uint64_t)coro_init; 279 ctx->env[JB_PC] = (__uint64_t)coro_init;
240 ctx->env[JB_SP] = (__uint64_t)STACK_ADJUST_PTR (sptr, ssize); 280 ctx->env[JB_SP] = (__uint64_t)STACK_ADJUST_PTR (sptr, ssize);
241 281
282# elif CORO_ASM
283
284 ctx->sp = (volatile void **)(ssize + (char *)sptr);
285 *--ctx->sp = (void *)coro_init;
286 *--ctx->sp = (void *)coro_init; // this is needed when the prologue saves ebp
287 ctx->sp -= NUM_CLOBBERED;
288
242# endif 289# endif
243 290
244 coro_transfer ((coro_context *)create_coro, (coro_context *)new_coro); 291 coro_transfer ((coro_context *)create_coro, (coro_context *)new_coro);
245 292
246#else 293#else
247error unsupported architecture 294# error unsupported architecture
248#endif 295#endif
249} 296}
250 297

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