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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38 | # define STACK_ADJUST_PTR(sp,ss) ((char *)(sp) + (ss) - 8) |
38 | # define STACK_ADJUST_PTR(sp,ss) ((char *)(sp) + (ss) - 8) |
39 | # define STACK_ADJUST_SIZE(sp,ss) ((ss) - 8) |
39 | # define STACK_ADJUST_SIZE(sp,ss) ((ss) - 8) |
40 | # elif __i386__ && CORO_LINUX |
40 | # elif __i386__ && CORO_LINUX |
41 | # define STACK_ADJUST_PTR(sp,ss) ((char *)(sp) + (ss)) |
41 | # define STACK_ADJUST_PTR(sp,ss) ((char *)(sp) + (ss)) |
42 | # define STACK_ADJUST_SIZE(sp,ss) (ss) |
42 | # define STACK_ADJUST_SIZE(sp,ss) (ss) |
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43 | # elif __amd64__ && CORO_LINUX |
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44 | # define STACK_ADJUST_PTR(sp,ss) ((char *)(sp) + (ss) - 8) |
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45 | # define STACK_ADJUST_SIZE(sp,ss) (ss) |
43 | # else |
46 | # else |
44 | # define STACK_ADJUST_PTR(sp,ss) (sp) |
47 | # define STACK_ADJUST_PTR(sp,ss) (sp) |
45 | # define STACK_ADJUST_SIZE(sp,ss) (ss) |
48 | # define STACK_ADJUST_SIZE(sp,ss) (ss) |
46 | # endif |
49 | # endif |
47 | #endif |
50 | #endif |
48 | |
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 | |
49 | #if CORO_SJLJ || CORO_LOOSE || CORO_LINUX || CORO_IRIX |
56 | #if CORO_SJLJ || CORO_LOSER || CORO_LINUX || CORO_IRIX |
50 | |
57 | |
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58 | #include <stdlib.h> |
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59 | |
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60 | #if CORO_SJLJ |
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61 | # include <stdio.h> |
51 | #include <signal.h> |
62 | # include <signal.h> |
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63 | # include <unistd.h> |
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64 | #endif |
52 | |
65 | |
53 | static volatile coro_func coro_init_func; |
66 | static volatile coro_func coro_init_func; |
54 | static volatile void *coro_init_arg; |
67 | static volatile void *coro_init_arg; |
55 | 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 |
56 | |
75 | |
57 | static void |
76 | static void |
58 | coro_init (void) |
77 | coro_init (void) |
59 | { |
78 | { |
60 | volatile coro_func func = coro_init_func; |
79 | volatile coro_func func = coro_init_func; |
61 | volatile void *arg = coro_init_arg; |
80 | volatile void *arg = coro_init_arg; |
62 | |
81 | |
63 | coro_transfer ((coro_context *)new_coro, (coro_context *)create_coro); |
82 | coro_transfer ((coro_context *)new_coro, (coro_context *)create_coro); |
64 | |
83 | |
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84 | #if HAVE_CFI |
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85 | asm (".cfi_startproc"); |
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86 | #endif |
65 | func ((void *)arg); |
87 | func ((void *)arg); |
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88 | #if HAVE_CFI |
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89 | asm (".cfi_endproc"); |
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90 | #endif |
66 | |
91 | |
67 | /* the new coro returned. bad. just abort() for now */ |
92 | /* the new coro returned. bad. just abort() for now */ |
68 | abort (); |
93 | abort (); |
69 | } |
94 | } |
70 | |
95 | |
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72 | |
97 | |
73 | static volatile int trampoline_count; |
98 | static volatile int trampoline_count; |
74 | |
99 | |
75 | /* trampoline signal handler */ |
100 | /* trampoline signal handler */ |
76 | static void |
101 | static void |
77 | trampoline(int sig) |
102 | trampoline (int sig) |
78 | { |
103 | { |
79 | if (setjmp (((coro_context *)new_coro)->env)) |
104 | if (setjmp (((coro_context *)new_coro)->env)) |
80 | coro_init (); /* start it */ |
105 | coro_init (); /* start it */ |
81 | else |
106 | else |
82 | trampoline_count++; |
107 | trampoline_count++; |
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85 | # endif |
110 | # endif |
86 | |
111 | |
87 | #endif |
112 | #endif |
88 | |
113 | |
89 | /* initialize a machine state */ |
114 | /* initialize a machine state */ |
90 | void coro_create(coro_context *ctx, |
115 | void coro_create (coro_context *ctx, |
91 | coro_func coro, void *arg, |
116 | coro_func coro, void *arg, |
92 | void *sptr, long ssize) |
117 | void *sptr, long ssize) |
93 | { |
118 | { |
94 | #if CORO_UCONTEXT |
119 | #if CORO_UCONTEXT |
95 | |
120 | |
96 | getcontext (&(ctx->uc)); |
121 | getcontext (&(ctx->uc)); |
97 | |
122 | |
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100 | ctx->uc.uc_stack.ss_size = (size_t) STACK_ADJUST_SIZE (sptr,ssize); |
125 | ctx->uc.uc_stack.ss_size = (size_t) STACK_ADJUST_SIZE (sptr,ssize); |
101 | ctx->uc.uc_stack.ss_flags = 0; |
126 | ctx->uc.uc_stack.ss_flags = 0; |
102 | |
127 | |
103 | makecontext (&(ctx->uc), (void (*)()) coro, 1, arg); |
128 | makecontext (&(ctx->uc), (void (*)()) coro, 1, arg); |
104 | |
129 | |
105 | #elif CORO_SJLJ || CORO_LOOSE || CORO_LINUX || CORO_IRIX |
130 | #elif CORO_SJLJ || CORO_LOSER || CORO_LINUX || CORO_IRIX |
106 | |
131 | |
107 | # if CORO_SJLJ |
132 | # if CORO_SJLJ |
108 | stack_t ostk, nstk; |
133 | stack_t ostk, nstk; |
109 | struct sigaction osa, nsa; |
134 | struct sigaction osa, nsa; |
110 | sigset_t nsig, osig; |
135 | sigset_t nsig, osig; |
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127 | nsa.sa_handler = trampoline; |
152 | nsa.sa_handler = trampoline; |
128 | sigemptyset (&nsa.sa_mask); |
153 | sigemptyset (&nsa.sa_mask); |
129 | nsa.sa_flags = SA_ONSTACK; |
154 | nsa.sa_flags = SA_ONSTACK; |
130 | |
155 | |
131 | if (sigaction (SIGUSR2, &nsa, &osa)) |
156 | if (sigaction (SIGUSR2, &nsa, &osa)) |
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157 | { |
132 | perror ("sigaction"); |
158 | perror ("sigaction"); |
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159 | abort (); |
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160 | } |
133 | |
161 | |
134 | /* set the new stack */ |
162 | /* set the new stack */ |
135 | nstk.ss_sp = STACK_ADJUST_PTR (sptr,ssize); /* yes, some platforms (IRIX) get this wrong. */ |
163 | nstk.ss_sp = STACK_ADJUST_PTR (sptr,ssize); /* yes, some platforms (IRIX) get this wrong. */ |
136 | nstk.ss_size = STACK_ADJUST_SIZE (sptr,ssize); |
164 | nstk.ss_size = STACK_ADJUST_SIZE (sptr,ssize); |
137 | nstk.ss_flags = 0; |
165 | nstk.ss_flags = 0; |
138 | |
166 | |
139 | if (sigaltstack (&nstk, &ostk) < 0) |
167 | if (sigaltstack (&nstk, &ostk) < 0) |
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168 | { |
140 | perror ("sigaltstack"); |
169 | perror ("sigaltstack"); |
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170 | abort (); |
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171 | } |
141 | |
172 | |
142 | trampoline_count = 0; |
173 | trampoline_count = 0; |
143 | kill (getpid (), SIGUSR2); |
174 | kill (getpid (), SIGUSR2); |
144 | sigfillset (&nsig); sigdelset (&nsig, SIGUSR2); |
175 | sigfillset (&nsig); sigdelset (&nsig, SIGUSR2); |
145 | |
176 | |
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156 | abort (); |
187 | abort (); |
157 | |
188 | |
158 | if (~ostk.ss_flags & SS_DISABLE) |
189 | if (~ostk.ss_flags & SS_DISABLE) |
159 | sigaltstack (&ostk, 0); |
190 | sigaltstack (&ostk, 0); |
160 | |
191 | |
161 | sigaction (SIGUSR1, &osa, 0); |
192 | sigaction (SIGUSR2, &osa, 0); |
162 | |
193 | |
163 | sigprocmask (SIG_SETMASK, &osig, 0); |
194 | sigprocmask (SIG_SETMASK, &osig, 0); |
164 | |
195 | |
165 | # elif CORO_LOOSE |
196 | # elif CORO_LOSER |
166 | |
197 | |
167 | setjmp (ctx->env); |
198 | setjmp (ctx->env); |
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199 | #if __CYGWIN__ |
168 | ctx->env[7] = (long)((char *)sptr + ssize); |
200 | ctx->env[7] = (long)((char *)sptr + ssize); |
169 | ctx->env[8] = (long)coro_init; |
201 | ctx->env[8] = (long)coro_init; |
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202 | #elif defined(_M_IX86) |
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203 | ((_JUMP_BUFFER *)&ctx->env)->Eip = (long)coro_init; |
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204 | ((_JUMP_BUFFER *)&ctx->env)->Esp = (long)STACK_ADJUST_PTR (sptr,ssize); |
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205 | #elif defined(_M_AMD64) |
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206 | ((_JUMP_BUFFER *)&ctx->env)->Rip = (__int64)coro_init; |
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207 | ((_JUMP_BUFFER *)&ctx->env)->Rsp = (__int64)STACK_ADJUST_PTR (sptr,ssize); |
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208 | #elif defined(_M_IA64) |
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209 | ((_JUMP_BUFFER *)&ctx->env)->StIIP = (__int64)coro_init; |
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210 | ((_JUMP_BUFFER *)&ctx->env)->IntSp = (__int64)STACK_ADJUST_PTR (sptr,ssize); |
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211 | #else |
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212 | #error "microsoft libc or architecture not supported" |
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213 | #endif |
170 | |
214 | |
171 | # elif CORO_LINUX |
215 | # elif CORO_LINUX |
172 | |
216 | |
173 | setjmp (ctx->env); |
217 | _setjmp (ctx->env); |
174 | #if defined(__GLIBC__) && defined(__GLIBC_MINOR__) \ |
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175 | && __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined(JB_PC) && defined(JB_SP) |
218 | #if __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (JB_PC) && defined (JB_SP) |
176 | ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init; |
219 | ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init; |
177 | ctx->env[0].__jmpbuf[JB_SP] = (long)STACK_ADJUST_PTR (sptr,ssize); |
220 | ctx->env[0].__jmpbuf[JB_SP] = (long)STACK_ADJUST_PTR (sptr, ssize); |
178 | #elif defined(__GLIBC__) && defined(__GLIBC_MINOR__) \ |
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179 | && __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined(__mc68000__) |
221 | #elif __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (__mc68000__) |
180 | ctx->env[0].__jmpbuf[0].__aregs[0] = (long int)coro_init; |
222 | ctx->env[0].__jmpbuf[0].__aregs[0] = (long int)coro_init; |
181 | ctx->env[0].__jmpbuf[0].__sp = (int *)((char *)sptr + ssize); |
223 | ctx->env[0].__jmpbuf[0].__sp = (int *)((char *)sptr + ssize); |
182 | #elif defined(__GNU_LIBRARY__) && defined(__i386__) |
224 | #elif defined (__GNU_LIBRARY__) && defined (__i386__) |
183 | ctx->env[0].__jmpbuf[0].__pc = (char *)coro_init; |
225 | ctx->env[0].__jmpbuf[0].__pc = (char *)coro_init; |
184 | ctx->env[0].__jmpbuf[0].__sp = (void *)((char *)sptr + ssize); |
226 | ctx->env[0].__jmpbuf[0].__sp = (void *)((char *)sptr + ssize); |
185 | #elif defined(__GNU_LIBRARY__) && defined(__amd64__) |
227 | #elif defined (__GNU_LIBRARY__) && defined (__amd64__) |
186 | ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init; |
228 | ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init; |
187 | ctx->env[0].__jmpbuf[JB_RSP] = (long)((char *)sptr + ssize); |
229 | ctx->env[0].__jmpbuf[JB_RSP] = (long)STACK_ADJUST_PTR (sptr, ssize); |
188 | #else |
230 | #else |
189 | #error "linux libc or architecture not supported" |
231 | #error "linux libc or architecture not supported" |
190 | #endif |
232 | #endif |
191 | |
233 | |
192 | # elif CORO_IRIX |
234 | # elif CORO_IRIX |
193 | |
235 | |
194 | setjmp (ctx->env); |
236 | setjmp (ctx->env); |
195 | ctx->env[JB_PC] = (__uint64_t)coro_init; |
237 | ctx->env[JB_PC] = (__uint64_t)coro_init; |
196 | ctx->env[JB_SP] = (__uint64_t)STACK_ADJUST_PTR (sptr,ssize); |
238 | ctx->env[JB_SP] = (__uint64_t)STACK_ADJUST_PTR (sptr, ssize); |
197 | |
239 | |
198 | # endif |
240 | # endif |
199 | |
241 | |
200 | coro_transfer ((coro_context *)create_coro, (coro_context *)new_coro); |
242 | coro_transfer ((coro_context *)create_coro, (coro_context *)new_coro); |
201 | |
243 | |