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/cvs/libcoro/coro.c
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Comparing libcoro/coro.c (file contents):
Revision 1.23 by root, Thu Nov 30 18:21:14 2006 UTC vs.
Revision 1.27 by root, Wed May 2 05:53:26 2007 UTC

… …
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>
… …
65 65
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 */
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
75
70static void 76static void
71coro_init (void) 77coro_init (void)
72{ 78{
73 volatile coro_func func = coro_init_func; 79 volatile coro_func func = coro_init_func;
74 volatile void *arg = coro_init_arg; 80 volatile void *arg = coro_init_arg;
… …
88/* trampoline signal handler */ 94/* trampoline signal handler */
89static void 95static void
90trampoline (int sig) 96trampoline (int sig)
91{ 97{
92 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
93 coro_init (); /* start it */ 103 coro_init (); /* start it */
104#if HAVE_CFI
105 asm (".cfi_endproc");
106#endif
107 }
94 else 108 else
95 trampoline_count++; 109 trampoline_count++;
96} 110}
97 111
98# endif 112# endif
99 113
114#endif
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}
100#endif 154#endif
101 155
102/* initialize a machine state */ 156/* initialize a machine state */
103void coro_create (coro_context *ctx, 157void coro_create (coro_context *ctx,
104 coro_func coro, void *arg, 158 coro_func coro, void *arg,
… …
113 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);
114 ctx->uc.uc_stack.ss_flags = 0; 168 ctx->uc.uc_stack.ss_flags = 0;
115 169
116 makecontext (&(ctx->uc), (void (*)()) coro, 1, arg); 170 makecontext (&(ctx->uc), (void (*)()) coro, 1, arg);
117 171
118#elif CORO_SJLJ || CORO_LOSER || CORO_LINUX || CORO_IRIX 172#elif CORO_SJLJ || CORO_LOSER || CORO_LINUX || CORO_IRIX || CORO_ASM
119 173
120# if CORO_SJLJ 174# if CORO_SJLJ
121 stack_t ostk, nstk; 175 stack_t ostk, nstk;
122 struct sigaction osa, nsa; 176 struct sigaction osa, nsa;
123 sigset_t nsig, osig; 177 sigset_t nsig, osig;
… …
201#endif 255#endif
202 256
203# elif CORO_LINUX 257# elif CORO_LINUX
204 258
205 _setjmp (ctx->env); 259 _setjmp (ctx->env);
206#if defined(__GLIBC__) && defined(__GLIBC_MINOR__) \
207 && __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined(JB_PC) && defined(JB_SP) 260#if __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (JB_PC) && defined (JB_SP)
208 ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init; 261 ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init;
209 ctx->env[0].__jmpbuf[JB_SP] = (long)STACK_ADJUST_PTR (sptr,ssize); 262 ctx->env[0].__jmpbuf[JB_SP] = (long)STACK_ADJUST_PTR (sptr, ssize);
210#elif defined(__GLIBC__) && defined(__GLIBC_MINOR__) \
211 && __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined(__mc68000__) 263#elif __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (__mc68000__)
212 ctx->env[0].__jmpbuf[0].__aregs[0] = (long int)coro_init; 264 ctx->env[0].__jmpbuf[0].__aregs[0] = (long int)coro_init;
213 ctx->env[0].__jmpbuf[0].__sp = (int *)((char *)sptr + ssize); 265 ctx->env[0].__jmpbuf[0].__sp = (int *)((char *)sptr + ssize);
214#elif defined(__GNU_LIBRARY__) && defined(__i386__) 266#elif defined (__GNU_LIBRARY__) && defined (__i386__)
215 ctx->env[0].__jmpbuf[0].__pc = (char *)coro_init; 267 ctx->env[0].__jmpbuf[0].__pc = (char *)coro_init;
216 ctx->env[0].__jmpbuf[0].__sp = (void *)((char *)sptr + ssize); 268 ctx->env[0].__jmpbuf[0].__sp = (void *)((char *)sptr + ssize);
217#elif defined(__GNU_LIBRARY__) && defined(__amd64__) 269#elif defined (__GNU_LIBRARY__) && defined (__amd64__)
218 ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init; 270 ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init;
219 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);
220#else 272#else
221#error "linux libc or architecture not supported" 273# error "linux libc or architecture not supported"
222#endif 274#endif
223 275
224# elif CORO_IRIX 276# elif CORO_IRIX
225 277
226 setjmp (ctx->env); 278 setjmp (ctx->env);
227 ctx->env[JB_PC] = (__uint64_t)coro_init; 279 ctx->env[JB_PC] = (__uint64_t)coro_init;
228 ctx->env[JB_SP] = (__uint64_t)STACK_ADJUST_PTR (sptr,ssize); 280 ctx->env[JB_SP] = (__uint64_t)STACK_ADJUST_PTR (sptr, ssize);
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;
229 288
230# endif 289# endif
231 290
232 coro_transfer ((coro_context *)create_coro, (coro_context *)new_coro); 291 coro_transfer ((coro_context *)create_coro, (coro_context *)new_coro);
233 292
234#else 293#else
235error unsupported architecture 294# error unsupported architecture
236#endif 295#endif
237} 296}
238 297

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