1 | /* |
1 | /* |
2 | * Copyright (c) 2001-2005 Marc Alexander Lehmann <schmorp@schmorp.de> |
2 | * Copyright (c) 2001-2006 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, |
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47 | # define STACK_ADJUST_PTR(sp,ss) (sp) |
47 | # define STACK_ADJUST_PTR(sp,ss) (sp) |
48 | # define STACK_ADJUST_SIZE(sp,ss) (ss) |
48 | # define STACK_ADJUST_SIZE(sp,ss) (ss) |
49 | # endif |
49 | # endif |
50 | #endif |
50 | #endif |
51 | |
51 | |
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52 | #if CORO_UCONTEXT |
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53 | # include <stddef.h> |
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54 | #endif |
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55 | |
52 | #if CORO_SJLJ || CORO_LOSER || CORO_LINUX || CORO_IRIX |
56 | #if CORO_SJLJ || CORO_LOSER || CORO_LINUX || CORO_IRIX |
53 | |
57 | |
54 | #include <stdlib.h> |
58 | #include <stdlib.h> |
55 | |
59 | |
56 | #if CORO_SJLJ |
60 | #if CORO_SJLJ |
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60 | #endif |
64 | #endif |
61 | |
65 | |
62 | static volatile coro_func coro_init_func; |
66 | static volatile coro_func coro_init_func; |
63 | static volatile void *coro_init_arg; |
67 | static volatile void *coro_init_arg; |
64 | static volatile coro_context *new_coro, *create_coro; |
68 | static volatile coro_context *new_coro, *create_coro; |
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69 | |
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70 | /* what we really want to detect here is wether we use a new-enough version of GAS */ |
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71 | /* instead, check for gcc 3 and ELF and hope for the best */ |
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72 | #if __GNUC__ >= 3 && __ELF__ |
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73 | # define HAVE_CFI 1 |
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74 | #endif |
65 | |
75 | |
66 | static void |
76 | static void |
67 | coro_init (void) |
77 | coro_init (void) |
68 | { |
78 | { |
69 | volatile coro_func func = coro_init_func; |
79 | volatile coro_func func = coro_init_func; |
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84 | /* trampoline signal handler */ |
94 | /* trampoline signal handler */ |
85 | static void |
95 | static void |
86 | trampoline (int sig) |
96 | trampoline (int sig) |
87 | { |
97 | { |
88 | 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 |
89 | 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 | } |
90 | else |
108 | else |
91 | trampoline_count++; |
109 | trampoline_count++; |
92 | } |
110 | } |
93 | |
111 | |
94 | # endif |
112 | # endif |
95 | |
113 | |
96 | #endif |
114 | #endif |
97 | |
115 | |
98 | /* initialize a machine state */ |
116 | /* initialize a machine state */ |
99 | void coro_create(coro_context *ctx, |
117 | void coro_create (coro_context *ctx, |
100 | coro_func coro, void *arg, |
118 | coro_func coro, void *arg, |
101 | void *sptr, long ssize) |
119 | void *sptr, long ssize) |
102 | { |
120 | { |
103 | #if CORO_UCONTEXT |
121 | #if CORO_UCONTEXT |
104 | |
122 | |
105 | getcontext (&(ctx->uc)); |
123 | getcontext (&(ctx->uc)); |
106 | |
124 | |
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136 | nsa.sa_handler = trampoline; |
154 | nsa.sa_handler = trampoline; |
137 | sigemptyset (&nsa.sa_mask); |
155 | sigemptyset (&nsa.sa_mask); |
138 | nsa.sa_flags = SA_ONSTACK; |
156 | nsa.sa_flags = SA_ONSTACK; |
139 | |
157 | |
140 | if (sigaction (SIGUSR2, &nsa, &osa)) |
158 | if (sigaction (SIGUSR2, &nsa, &osa)) |
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159 | { |
141 | perror ("sigaction"); |
160 | perror ("sigaction"); |
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161 | abort (); |
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162 | } |
142 | |
163 | |
143 | /* set the new stack */ |
164 | /* set the new stack */ |
144 | nstk.ss_sp = STACK_ADJUST_PTR (sptr,ssize); /* yes, some platforms (IRIX) get this wrong. */ |
165 | nstk.ss_sp = STACK_ADJUST_PTR (sptr,ssize); /* yes, some platforms (IRIX) get this wrong. */ |
145 | nstk.ss_size = STACK_ADJUST_SIZE (sptr,ssize); |
166 | nstk.ss_size = STACK_ADJUST_SIZE (sptr,ssize); |
146 | nstk.ss_flags = 0; |
167 | nstk.ss_flags = 0; |
147 | |
168 | |
148 | if (sigaltstack (&nstk, &ostk) < 0) |
169 | if (sigaltstack (&nstk, &ostk) < 0) |
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170 | { |
149 | perror ("sigaltstack"); |
171 | perror ("sigaltstack"); |
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172 | abort (); |
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173 | } |
150 | |
174 | |
151 | trampoline_count = 0; |
175 | trampoline_count = 0; |
152 | kill (getpid (), SIGUSR2); |
176 | kill (getpid (), SIGUSR2); |
153 | sigfillset (&nsig); sigdelset (&nsig, SIGUSR2); |
177 | sigfillset (&nsig); sigdelset (&nsig, SIGUSR2); |
154 | |
178 | |
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172 | sigprocmask (SIG_SETMASK, &osig, 0); |
196 | sigprocmask (SIG_SETMASK, &osig, 0); |
173 | |
197 | |
174 | # elif CORO_LOSER |
198 | # elif CORO_LOSER |
175 | |
199 | |
176 | setjmp (ctx->env); |
200 | setjmp (ctx->env); |
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201 | #if __CYGWIN__ |
177 | ctx->env[7] = (long)((char *)sptr + ssize); |
202 | ctx->env[7] = (long)((char *)sptr + ssize); |
178 | ctx->env[8] = (long)coro_init; |
203 | ctx->env[8] = (long)coro_init; |
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204 | #elif defined(_M_IX86) |
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205 | ((_JUMP_BUFFER *)&ctx->env)->Eip = (long)coro_init; |
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206 | ((_JUMP_BUFFER *)&ctx->env)->Esp = (long)STACK_ADJUST_PTR (sptr,ssize); |
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207 | #elif defined(_M_AMD64) |
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208 | ((_JUMP_BUFFER *)&ctx->env)->Rip = (__int64)coro_init; |
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209 | ((_JUMP_BUFFER *)&ctx->env)->Rsp = (__int64)STACK_ADJUST_PTR (sptr,ssize); |
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210 | #elif defined(_M_IA64) |
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211 | ((_JUMP_BUFFER *)&ctx->env)->StIIP = (__int64)coro_init; |
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212 | ((_JUMP_BUFFER *)&ctx->env)->IntSp = (__int64)STACK_ADJUST_PTR (sptr,ssize); |
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213 | #else |
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214 | #error "microsoft libc or architecture not supported" |
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215 | #endif |
179 | |
216 | |
180 | # elif CORO_LINUX |
217 | # elif CORO_LINUX |
181 | |
218 | |
182 | setjmp (ctx->env); |
219 | _setjmp (ctx->env); |
183 | #if defined(__GLIBC__) && defined(__GLIBC_MINOR__) \ |
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184 | && __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined(JB_PC) && defined(JB_SP) |
220 | #if __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (JB_PC) && defined (JB_SP) |
185 | ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init; |
221 | ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init; |
186 | ctx->env[0].__jmpbuf[JB_SP] = (long)STACK_ADJUST_PTR (sptr,ssize); |
222 | ctx->env[0].__jmpbuf[JB_SP] = (long)STACK_ADJUST_PTR (sptr, ssize); |
187 | #elif defined(__GLIBC__) && defined(__GLIBC_MINOR__) \ |
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188 | && __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined(__mc68000__) |
223 | #elif __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (__mc68000__) |
189 | ctx->env[0].__jmpbuf[0].__aregs[0] = (long int)coro_init; |
224 | ctx->env[0].__jmpbuf[0].__aregs[0] = (long int)coro_init; |
190 | ctx->env[0].__jmpbuf[0].__sp = (int *)((char *)sptr + ssize); |
225 | ctx->env[0].__jmpbuf[0].__sp = (int *)((char *)sptr + ssize); |
191 | #elif defined(__GNU_LIBRARY__) && defined(__i386__) |
226 | #elif defined (__GNU_LIBRARY__) && defined (__i386__) |
192 | ctx->env[0].__jmpbuf[0].__pc = (char *)coro_init; |
227 | ctx->env[0].__jmpbuf[0].__pc = (char *)coro_init; |
193 | ctx->env[0].__jmpbuf[0].__sp = (void *)((char *)sptr + ssize); |
228 | ctx->env[0].__jmpbuf[0].__sp = (void *)((char *)sptr + ssize); |
194 | #elif defined(__GNU_LIBRARY__) && defined(__amd64__) |
229 | #elif defined (__GNU_LIBRARY__) && defined (__amd64__) |
195 | ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init; |
230 | ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init; |
196 | ctx->env[0].__jmpbuf[JB_RSP] = (long)STACK_ADJUST_PTR (sptr,ssize); |
231 | ctx->env[0].__jmpbuf[JB_RSP] = (long)STACK_ADJUST_PTR (sptr, ssize); |
197 | #else |
232 | #else |
198 | #error "linux libc or architecture not supported" |
233 | #error "linux libc or architecture not supported" |
199 | #endif |
234 | #endif |
200 | |
235 | |
201 | # elif CORO_IRIX |
236 | # elif CORO_IRIX |
202 | |
237 | |
203 | setjmp (ctx->env); |
238 | setjmp (ctx->env); |
204 | ctx->env[JB_PC] = (__uint64_t)coro_init; |
239 | ctx->env[JB_PC] = (__uint64_t)coro_init; |
205 | ctx->env[JB_SP] = (__uint64_t)STACK_ADJUST_PTR (sptr,ssize); |
240 | ctx->env[JB_SP] = (__uint64_t)STACK_ADJUST_PTR (sptr, ssize); |
206 | |
241 | |
207 | # endif |
242 | # endif |
208 | |
243 | |
209 | coro_transfer ((coro_context *)create_coro, (coro_context *)new_coro); |
244 | coro_transfer ((coro_context *)create_coro, (coro_context *)new_coro); |
210 | |
245 | |