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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> |
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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 |
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85 | asm (".cfi_startproc"); |
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86 | #endif |
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87 | func ((void *)arg); |
84 | func ((void *)arg); |
88 | #if HAVE_CFI |
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89 | asm (".cfi_endproc"); |
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90 | #endif |
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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 | |
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100 | /* trampoline signal handler */ |
94 | /* trampoline signal handler */ |
101 | static void |
95 | static void |
102 | trampoline (int sig) |
96 | trampoline (int sig) |
103 | { |
97 | { |
104 | if (setjmp (((coro_context *)new_coro)->env)) |
98 | if (setjmp (((coro_context *)new_coro)->env)) |
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99 | { |
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100 | #if HAVE_CFI |
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101 | asm (".cfi_startproc"); |
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102 | #endif |
105 | coro_init (); /* start it */ |
103 | coro_init (); /* start it */ |
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104 | #if HAVE_CFI |
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105 | asm (".cfi_endproc"); |
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106 | #endif |
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107 | } |
106 | else |
108 | else |
107 | trampoline_count++; |
109 | trampoline_count++; |
108 | } |
110 | } |
109 | |
111 | |
110 | # endif |
112 | # endif |
111 | |
113 | |
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114 | #endif |
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115 | |
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116 | #if CORO_ASM |
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117 | void __attribute__((__noinline__, __fastcall__)) |
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118 | coro_transfer (struct coro_context *prev, struct coro_context *next) |
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119 | { |
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120 | asm volatile ( |
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121 | #if __amd64 |
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122 | # define NUM_CLOBBERED 5 |
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123 | "push %%rbx\n\t" |
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124 | "push %%r12\n\t" |
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125 | "push %%r13\n\t" |
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126 | "push %%r14\n\t" |
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127 | "push %%r15\n\t" |
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128 | "mov %%rsp, %0\n\t" |
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129 | "mov %1, %%rsp\n\t" |
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130 | "pop %%r15\n\t" |
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131 | "pop %%r14\n\t" |
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132 | "pop %%r13\n\t" |
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133 | "pop %%r12\n\t" |
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134 | "pop %%rbx\n\t" |
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135 | #elif __i386 |
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136 | # define NUM_CLOBBERED 4 |
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137 | "push %%ebx\n\t" |
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138 | "push %%esi\n\t" |
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139 | "push %%edi\n\t" |
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140 | "push %%ebp\n\t" |
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141 | "mov %%esp, %0\n\t" |
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142 | "mov %1, %%esp\n\t" |
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143 | "pop %%ebp\n\t" |
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144 | "pop %%edi\n\t" |
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145 | "pop %%esi\n\t" |
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146 | "pop %%ebx\n\t" |
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147 | #else |
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148 | # error unsupported architecture |
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149 | #endif |
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150 | : "=m" (prev->sp) |
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151 | : "m" (next->sp) |
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152 | ); |
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153 | } |
112 | #endif |
154 | #endif |
113 | |
155 | |
114 | /* initialize a machine state */ |
156 | /* initialize a machine state */ |
115 | void coro_create (coro_context *ctx, |
157 | void coro_create (coro_context *ctx, |
116 | coro_func coro, void *arg, |
158 | coro_func coro, void *arg, |
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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; |
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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 | |
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282 | # elif CORO_ASM |
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283 | |
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284 | ctx->sp = (volatile void **)(ssize + (char *)sptr); |
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285 | *--ctx->sp = (void *)coro_init; |
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286 | *--ctx->sp = (void *)coro_init; // this is needed when the prologue saves ebp |
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287 | ctx->sp -= NUM_CLOBBERED; |
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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 |
245 | error unsupported architecture |
294 | # error unsupported architecture |
246 | #endif |
295 | #endif |
247 | } |
296 | } |
248 | |
297 | |