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/cvs/libcoro/coro.c
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Comparing libcoro/coro.c (file contents):
Revision 1.25 by root, Fri Apr 27 19:26:18 2007 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>
… …
79 volatile coro_func func = coro_init_func; 79 volatile coro_func func = coro_init_func;
80 volatile void *arg = coro_init_arg; 80 volatile void *arg = coro_init_arg;
81 81
82 coro_transfer ((coro_context *)new_coro, (coro_context *)create_coro); 82 coro_transfer ((coro_context *)new_coro, (coro_context *)create_coro);
83 83
84#if HAVE_CFI
85 asm (".cfi_startproc");
86#endif
87 func ((void *)arg); 84 func ((void *)arg);
88#if HAVE_CFI
89 asm (".cfi_endproc");
90#endif
91 85
92 /* the new coro returned. bad. just abort() for now */ 86 /* the new coro returned. bad. just abort() for now */
93 abort (); 87 abort ();
94} 88}
95 89
… …
100/* trampoline signal handler */ 94/* trampoline signal handler */
101static void 95static void
102trampoline (int sig) 96trampoline (int sig)
103{ 97{
104 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
105 coro_init (); /* start it */ 103 coro_init (); /* start it */
104#if HAVE_CFI
105 asm (".cfi_endproc");
106#endif
107 }
106 else 108 else
107 trampoline_count++; 109 trampoline_count++;
108} 110}
109 111
110# endif 112# endif
111 113
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}
112#endif 154#endif
113 155
114/* initialize a machine state */ 156/* initialize a machine state */
115void coro_create (coro_context *ctx, 157void coro_create (coro_context *ctx,
116 coro_func coro, void *arg, 158 coro_func coro, void *arg,
… …
125 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);
126 ctx->uc.uc_stack.ss_flags = 0; 168 ctx->uc.uc_stack.ss_flags = 0;
127 169
128 makecontext (&(ctx->uc), (void (*)()) coro, 1, arg); 170 makecontext (&(ctx->uc), (void (*)()) coro, 1, arg);
129 171
130#elif CORO_SJLJ || CORO_LOSER || CORO_LINUX || CORO_IRIX 172#elif CORO_SJLJ || CORO_LOSER || CORO_LINUX || CORO_IRIX || CORO_ASM
131 173
132# if CORO_SJLJ 174# if CORO_SJLJ
133 stack_t ostk, nstk; 175 stack_t ostk, nstk;
134 struct sigaction osa, nsa; 176 struct sigaction osa, nsa;
135 sigset_t nsig, osig; 177 sigset_t nsig, osig;
… …
226 ctx->env[0].__jmpbuf[0].__sp = (void *)((char *)sptr + ssize); 268 ctx->env[0].__jmpbuf[0].__sp = (void *)((char *)sptr + ssize);
227#elif defined (__GNU_LIBRARY__) && defined (__amd64__) 269#elif defined (__GNU_LIBRARY__) && defined (__amd64__)
228 ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init; 270 ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init;
229 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);
230#else 272#else
231#error "linux libc or architecture not supported" 273# error "linux libc or architecture not supported"
232#endif 274#endif
233 275
234# elif CORO_IRIX 276# elif CORO_IRIX
235 277
236 setjmp (ctx->env); 278 setjmp (ctx->env);
237 ctx->env[JB_PC] = (__uint64_t)coro_init; 279 ctx->env[JB_PC] = (__uint64_t)coro_init;
238 ctx->env[JB_SP] = (__uint64_t)STACK_ADJUST_PTR (sptr, ssize); 280 ctx->env[JB_SP] = (__uint64_t)STACK_ADJUST_PTR (sptr, ssize);
239 281
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
240# endif 289# endif
241 290
242 coro_transfer ((coro_context *)create_coro, (coro_context *)new_coro); 291 coro_transfer ((coro_context *)create_coro, (coro_context *)new_coro);
243 292
244#else 293#else
245error unsupported architecture 294# error unsupported architecture
246#endif 295#endif
247} 296}
248 297

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