1 | /* |
1 | /* |
2 | * Copyright (c) 2001 Marc Alexander Lehmann <pcg@goof.com> |
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, |
… | |
… | |
30 | * go to Ralf S. Engelschall <rse@engelschall.com>. |
30 | * go to Ralf S. Engelschall <rse@engelschall.com>. |
31 | */ |
31 | */ |
32 | |
32 | |
33 | #include "coro.h" |
33 | #include "coro.h" |
34 | |
34 | |
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35 | #if !defined(STACK_ADJUST_PTR) |
35 | /* IRIX is decidedly NON-unix */ |
36 | /* IRIX is decidedly NON-unix */ |
36 | #if __sgi |
37 | # if __sgi |
37 | # define STACK_ADJUST(sp,ss) ((char *)(sp) + (ss) - 8) |
38 | # define STACK_ADJUST_PTR(sp,ss) ((char *)(sp) + (ss) - 8) |
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39 | # define STACK_ADJUST_SIZE(sp,ss) ((ss) - 8) |
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40 | # elif __i386__ && CORO_LINUX |
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41 | # define STACK_ADJUST_PTR(sp,ss) ((char *)(sp) + (ss)) |
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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) |
38 | #else |
46 | # else |
39 | # define STACK_ADJUST(sp,ss) (sp) |
47 | # define STACK_ADJUST_PTR(sp,ss) (sp) |
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48 | # define STACK_ADJUST_SIZE(sp,ss) (ss) |
40 | #endif |
49 | # endif |
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50 | #endif |
41 | |
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 | |
42 | #if CORO_SJLJ || CORO_LOOSE || CORO_LINUX || CORO_IRIX |
56 | #if CORO_SJLJ || CORO_LOSER || CORO_LINUX || CORO_IRIX |
43 | |
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> |
44 | #include <signal.h> |
62 | # include <signal.h> |
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63 | # include <unistd.h> |
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64 | #endif |
45 | |
65 | |
46 | static volatile coro_func coro_init_func; |
66 | static volatile coro_func coro_init_func; |
47 | static volatile void *coro_init_arg; |
67 | static volatile void *coro_init_arg; |
48 | 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 |
49 | |
75 | |
50 | static void |
76 | static void |
51 | coro_init (void) |
77 | coro_init (void) |
52 | { |
78 | { |
53 | volatile coro_func func = coro_init_func; |
79 | volatile coro_func func = coro_init_func; |
54 | volatile void *arg = coro_init_arg; |
80 | volatile void *arg = coro_init_arg; |
55 | |
81 | |
56 | coro_transfer ((coro_context *)new_coro, (coro_context *)create_coro); |
82 | coro_transfer ((coro_context *)new_coro, (coro_context *)create_coro); |
57 | |
83 | |
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84 | #if HAVE_CFI |
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85 | asm (".cfi_startproc"); |
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86 | #endif |
58 | 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 |
59 | |
91 | |
60 | /* the new coro returned. bad. just abort() for now */ |
92 | /* the new coro returned. bad. just abort() for now */ |
61 | abort (); |
93 | abort (); |
62 | } |
94 | } |
63 | |
95 | |
… | |
… | |
65 | |
97 | |
66 | static volatile int trampoline_count; |
98 | static volatile int trampoline_count; |
67 | |
99 | |
68 | /* trampoline signal handler */ |
100 | /* trampoline signal handler */ |
69 | static void |
101 | static void |
70 | trampoline(int sig) |
102 | trampoline (int sig) |
71 | { |
103 | { |
72 | if (setjmp (((coro_context *)new_coro)->env)) |
104 | if (setjmp (((coro_context *)new_coro)->env)) |
73 | coro_init (); /* start it */ |
105 | coro_init (); /* start it */ |
74 | else |
106 | else |
75 | trampoline_count++; |
107 | trampoline_count++; |
… | |
… | |
78 | # endif |
110 | # endif |
79 | |
111 | |
80 | #endif |
112 | #endif |
81 | |
113 | |
82 | /* initialize a machine state */ |
114 | /* initialize a machine state */ |
83 | void coro_create(coro_context *ctx, |
115 | void coro_create (coro_context *ctx, |
84 | coro_func coro, void *arg, |
116 | coro_func coro, void *arg, |
85 | void *sptr, long ssize) |
117 | void *sptr, long ssize) |
86 | { |
118 | { |
87 | #if CORO_UCONTEXT |
119 | #if CORO_UCONTEXT |
88 | |
120 | |
89 | getcontext (&(ctx->uc)); |
121 | getcontext (&(ctx->uc)); |
90 | |
122 | |
91 | ctx->uc.uc_link = 0; |
123 | ctx->uc.uc_link = 0; |
92 | ctx->uc.uc_stack.ss_sp = STACK_ADJUST(sptr,ssize); |
124 | ctx->uc.uc_stack.ss_sp = STACK_ADJUST_PTR (sptr,ssize); |
93 | ctx->uc.uc_stack.ss_size = (size_t) ssize; |
125 | ctx->uc.uc_stack.ss_size = (size_t) STACK_ADJUST_SIZE (sptr,ssize); |
94 | ctx->uc.uc_stack.ss_flags = 0; |
126 | ctx->uc.uc_stack.ss_flags = 0; |
95 | |
127 | |
96 | makecontext (&(ctx->uc), (void (*)()) coro, 1, arg); |
128 | makecontext (&(ctx->uc), (void (*)()) coro, 1, arg); |
97 | |
129 | |
98 | #elif CORO_SJLJ || CORO_LOOSE || CORO_LINUX || CORO_IRIX |
130 | #elif CORO_SJLJ || CORO_LOSER || CORO_LINUX || CORO_IRIX |
99 | |
131 | |
100 | # if CORO_SJLJ |
132 | # if CORO_SJLJ |
101 | stack_t ostk, nstk; |
133 | stack_t ostk, nstk; |
102 | struct sigaction osa, nsa; |
134 | struct sigaction osa, nsa; |
103 | sigset_t nsig, osig; |
135 | sigset_t nsig, osig; |
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120 | nsa.sa_handler = trampoline; |
152 | nsa.sa_handler = trampoline; |
121 | sigemptyset (&nsa.sa_mask); |
153 | sigemptyset (&nsa.sa_mask); |
122 | nsa.sa_flags = SA_ONSTACK; |
154 | nsa.sa_flags = SA_ONSTACK; |
123 | |
155 | |
124 | if (sigaction (SIGUSR2, &nsa, &osa)) |
156 | if (sigaction (SIGUSR2, &nsa, &osa)) |
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157 | { |
125 | perror ("sigaction"); |
158 | perror ("sigaction"); |
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159 | abort (); |
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160 | } |
126 | |
161 | |
127 | /* set the new stack */ |
162 | /* set the new stack */ |
128 | nstk.ss_sp = STACK_ADJUST(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. */ |
129 | nstk.ss_size = ssize; |
164 | nstk.ss_size = STACK_ADJUST_SIZE (sptr,ssize); |
130 | nstk.ss_flags = 0; |
165 | nstk.ss_flags = 0; |
131 | |
166 | |
132 | if (sigaltstack (&nstk, &ostk) < 0) |
167 | if (sigaltstack (&nstk, &ostk) < 0) |
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168 | { |
133 | perror ("sigaltstack"); |
169 | perror ("sigaltstack"); |
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170 | abort (); |
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171 | } |
134 | |
172 | |
135 | trampoline_count = 0; |
173 | trampoline_count = 0; |
136 | kill (getpid (), SIGUSR2); |
174 | kill (getpid (), SIGUSR2); |
137 | sigfillset (&nsig); sigdelset (&nsig, SIGUSR2); |
175 | sigfillset (&nsig); sigdelset (&nsig, SIGUSR2); |
138 | |
176 | |
… | |
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149 | abort (); |
187 | abort (); |
150 | |
188 | |
151 | if (~ostk.ss_flags & SS_DISABLE) |
189 | if (~ostk.ss_flags & SS_DISABLE) |
152 | sigaltstack (&ostk, 0); |
190 | sigaltstack (&ostk, 0); |
153 | |
191 | |
154 | sigaction (SIGUSR1, &osa, 0); |
192 | sigaction (SIGUSR2, &osa, 0); |
155 | |
193 | |
156 | sigprocmask (SIG_SETMASK, &osig, 0); |
194 | sigprocmask (SIG_SETMASK, &osig, 0); |
157 | |
195 | |
158 | # elif CORO_LOOSE |
196 | # elif CORO_LOSER |
159 | |
197 | |
160 | setjmp (ctx->env); |
198 | setjmp (ctx->env); |
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199 | #if __CYGWIN__ |
161 | ctx->env[7] = (int)((char *)sptr + ssize); |
200 | ctx->env[7] = (long)((char *)sptr + ssize); |
162 | ctx->env[8] = (int)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 |
163 | |
214 | |
164 | # elif CORO_LINUX |
215 | # elif CORO_LINUX |
165 | |
216 | |
166 | setjmp (ctx->env); |
217 | _setjmp (ctx->env); |
167 | #if defined(__GLIBC__) && defined(__GLIBC_MINOR__) \ |
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168 | && __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined(JB_PC) && defined(JB_SP) |
218 | #if __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (JB_PC) && defined (JB_SP) |
169 | ctx->env[0].__jmpbuf[JB_PC] = (int)coro_init; |
219 | ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init; |
170 | ctx->env[0].__jmpbuf[JB_SP] = (int)((char *)sptr + ssize); |
220 | ctx->env[0].__jmpbuf[JB_SP] = (long)STACK_ADJUST_PTR (sptr, ssize); |
171 | #elif defined(__GLIBC__) && defined(__GLIBC_MINOR__) \ |
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172 | && __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined(__mc68000__) |
221 | #elif __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (__mc68000__) |
173 | ctx->env[0].__jmpbuf[0].__aregs[0] = (long int)coro_init; |
222 | ctx->env[0].__jmpbuf[0].__aregs[0] = (long int)coro_init; |
174 | ctx->env[0].__jmpbuf[0].__sp = (int *)((char *)sptr + ssize); |
223 | ctx->env[0].__jmpbuf[0].__sp = (int *)((char *)sptr + ssize); |
175 | #elif defined(__GNU_LIBRARY__) && defined(__i386__) |
224 | #elif defined (__GNU_LIBRARY__) && defined (__i386__) |
176 | ctx->env[0].__jmpbuf[0].__pc = (char *)coro_init; |
225 | ctx->env[0].__jmpbuf[0].__pc = (char *)coro_init; |
177 | ctx->env[0].__jmpbuf[0].__sp = (void *)((char *)sptr + ssize); |
226 | ctx->env[0].__jmpbuf[0].__sp = (void *)((char *)sptr + ssize); |
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227 | #elif defined (__GNU_LIBRARY__) && defined (__amd64__) |
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228 | ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init; |
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229 | ctx->env[0].__jmpbuf[JB_RSP] = (long)STACK_ADJUST_PTR (sptr, ssize); |
178 | #else |
230 | #else |
179 | #error "linux libc or architecture not supported" |
231 | #error "linux libc or architecture not supported" |
180 | #endif |
232 | #endif |
181 | |
233 | |
182 | # elif CORO_IRIX |
234 | # elif CORO_IRIX |
183 | |
235 | |
184 | setjmp (ctx->env); |
236 | setjmp (ctx->env); |
185 | ctx->env[JB_PC] = (__uint64_t)coro_init; |
237 | ctx->env[JB_PC] = (__uint64_t)coro_init; |
186 | ctx->env[JB_SP] = (__uint64_t)STACK_ADJUST(sptr,ssize); |
238 | ctx->env[JB_SP] = (__uint64_t)STACK_ADJUST_PTR (sptr, ssize); |
187 | |
239 | |
188 | # endif |
240 | # endif |
189 | |
241 | |
190 | coro_transfer ((coro_context *)create_coro, (coro_context *)new_coro); |
242 | coro_transfer ((coro_context *)create_coro, (coro_context *)new_coro); |
191 | |
243 | |