1 | /* |
1 | /* |
2 | * Copyright (c) 2001 Marc Alexander Lehmann <pcg@goof.com> |
2 | * Copyright (c) 2001-2005 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 | |
35 | #if CORO_LOOSE || CORO_SJLJ |
35 | #if !defined(STACK_ADJUST_PTR) |
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36 | /* IRIX is decidedly NON-unix */ |
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37 | # if __sgi |
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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 | # else |
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44 | # define STACK_ADJUST_PTR(sp,ss) (sp) |
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45 | # define STACK_ADJUST_SIZE(sp,ss) (ss) |
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46 | # endif |
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47 | #endif |
36 | |
48 | |
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49 | #if CORO_SJLJ || CORO_LOOSE || CORO_LINUX || CORO_IRIX |
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50 | |
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51 | #if CORO_SJLJ |
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52 | # include <stdio.h> |
37 | #include <signal.h> |
53 | # include <signal.h> |
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54 | #endif |
38 | |
55 | |
39 | static volatile coro_func coro_init_func; |
56 | static volatile coro_func coro_init_func; |
40 | static volatile void *coro_init_arg; |
57 | static volatile void *coro_init_arg; |
41 | static volatile coro_context *new_coro, *create_coro; |
58 | static volatile coro_context *new_coro, *create_coro; |
42 | |
59 | |
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53 | /* the new coro returned. bad. just abort() for now */ |
70 | /* the new coro returned. bad. just abort() for now */ |
54 | abort (); |
71 | abort (); |
55 | } |
72 | } |
56 | |
73 | |
57 | # if CORO_SJLJ |
74 | # if CORO_SJLJ |
58 | # define coro_save(ctx) (void)setjmp((ctx)->env) |
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59 | |
75 | |
60 | static volatile int trampoline_count; |
76 | static volatile int trampoline_count; |
61 | |
77 | |
62 | /* trampoline signal handler */ |
78 | /* trampoline signal handler */ |
63 | static void |
79 | static void |
64 | trampoline(int sig) |
80 | trampoline (int sig) |
65 | { |
81 | { |
66 | if (setjmp (((coro_context *)new_coro)->env)) |
82 | if (setjmp (((coro_context *)new_coro)->env)) |
67 | coro_init (); /* start it */ |
83 | coro_init (); /* start it */ |
68 | else |
84 | else |
69 | trampoline_count++; |
85 | trampoline_count++; |
70 | } |
86 | } |
71 | |
87 | |
72 | # endif |
88 | # endif |
73 | |
89 | |
74 | #elif CORO_UCONTEXT |
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75 | # define coro_save(ctx) getcontext(&((ctx)->uc)) |
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76 | #endif |
90 | #endif |
77 | |
91 | |
78 | /* initialize a machine state */ |
92 | /* initialize a machine state */ |
79 | void coro_create(coro_context *ctx, |
93 | void coro_create(coro_context *ctx, |
80 | coro_func coro, void *arg, |
94 | coro_func coro, void *arg, |
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82 | { |
96 | { |
83 | #if CORO_UCONTEXT |
97 | #if CORO_UCONTEXT |
84 | |
98 | |
85 | getcontext (&(ctx->uc)); |
99 | getcontext (&(ctx->uc)); |
86 | |
100 | |
87 | ctx->uc.uc_link = 0; |
101 | ctx->uc.uc_link = 0; |
88 | ctx->uc.uc_stack.ss_sp = sptr; |
102 | ctx->uc.uc_stack.ss_sp = STACK_ADJUST_PTR (sptr,ssize); |
89 | ctx->uc.uc_stack.ss_size = (size_t) ssize; |
103 | ctx->uc.uc_stack.ss_size = (size_t) STACK_ADJUST_SIZE (sptr,ssize); |
90 | ctx->uc.uc_stack.ss_flags = 0; |
104 | ctx->uc.uc_stack.ss_flags = 0; |
91 | |
105 | |
92 | makecontext (&(ctx->uc), (void (*)()) coro, 1, arg); |
106 | makecontext (&(ctx->uc), (void (*)()) coro, 1, arg); |
93 | |
107 | |
94 | #elif CORO_SJLJ || CORO_LOOSE |
108 | #elif CORO_SJLJ || CORO_LOOSE || CORO_LINUX || CORO_IRIX |
95 | |
109 | |
96 | # if CORO_SJLJ |
110 | # if CORO_SJLJ |
97 | stack_t ostk, nstk; |
111 | stack_t ostk, nstk; |
98 | struct sigaction osa, nsa; |
112 | struct sigaction osa, nsa; |
99 | sigset_t nsig, osig; |
113 | sigset_t nsig, osig; |
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119 | |
133 | |
120 | if (sigaction (SIGUSR2, &nsa, &osa)) |
134 | if (sigaction (SIGUSR2, &nsa, &osa)) |
121 | perror ("sigaction"); |
135 | perror ("sigaction"); |
122 | |
136 | |
123 | /* set the new stack */ |
137 | /* set the new stack */ |
124 | nstk.ss_sp = sptr; |
138 | nstk.ss_sp = STACK_ADJUST_PTR (sptr,ssize); /* yes, some platforms (IRIX) get this wrong. */ |
125 | nstk.ss_size = ssize; |
139 | nstk.ss_size = STACK_ADJUST_SIZE (sptr,ssize); |
126 | nstk.ss_flags = 0; |
140 | nstk.ss_flags = 0; |
127 | |
141 | |
128 | if (sigaltstack (&nstk, &ostk) < 0) |
142 | if (sigaltstack (&nstk, &ostk) < 0) |
129 | perror ("sigaltstack"); |
143 | perror ("sigaltstack"); |
130 | |
144 | |
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149 | |
163 | |
150 | sigaction (SIGUSR1, &osa, 0); |
164 | sigaction (SIGUSR1, &osa, 0); |
151 | |
165 | |
152 | sigprocmask (SIG_SETMASK, &osig, 0); |
166 | sigprocmask (SIG_SETMASK, &osig, 0); |
153 | |
167 | |
154 | # elif MS_LOOSE |
168 | # elif CORO_LOOSE |
155 | |
169 | |
156 | coro_save (ctx); |
170 | setjmp (ctx->env); |
157 | ctx->env[7] = (int)((char *)sptr + ssize); |
171 | ctx->env[7] = (long)((char *)sptr + ssize); |
158 | ctx->env[8] = (int)coro; |
172 | ctx->env[8] = (long)coro_init; |
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173 | |
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174 | # elif CORO_LINUX |
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175 | |
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176 | setjmp (ctx->env); |
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177 | #if defined(__GLIBC__) && defined(__GLIBC_MINOR__) \ |
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178 | && __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined(JB_PC) && defined(JB_SP) |
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179 | ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init; |
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180 | ctx->env[0].__jmpbuf[JB_SP] = (long)STACK_ADJUST_PTR (sptr,ssize); |
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181 | #elif defined(__GLIBC__) && defined(__GLIBC_MINOR__) \ |
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182 | && __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined(__mc68000__) |
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183 | ctx->env[0].__jmpbuf[0].__aregs[0] = (long int)coro_init; |
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184 | ctx->env[0].__jmpbuf[0].__sp = (int *)((char *)sptr + ssize); |
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185 | #elif defined(__GNU_LIBRARY__) && defined(__i386__) |
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186 | ctx->env[0].__jmpbuf[0].__pc = (char *)coro_init; |
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187 | ctx->env[0].__jmpbuf[0].__sp = (void *)((char *)sptr + ssize); |
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188 | #elif defined(__GNU_LIBRARY__) && defined(__amd64__) |
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189 | ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init; |
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190 | ctx->env[0].__jmpbuf[JB_RSP] = (long)((char *)sptr + ssize); |
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191 | #else |
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192 | #error "linux libc or architecture not supported" |
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193 | #endif |
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194 | |
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195 | # elif CORO_IRIX |
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196 | |
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197 | setjmp (ctx->env); |
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198 | ctx->env[JB_PC] = (__uint64_t)coro_init; |
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199 | ctx->env[JB_SP] = (__uint64_t)STACK_ADJUST_PTR (sptr,ssize); |
159 | |
200 | |
160 | # endif |
201 | # endif |
161 | |
202 | |
162 | coro_transfer ((coro_context *)create_coro, (coro_context *)new_coro); |
203 | coro_transfer ((coro_context *)create_coro, (coro_context *)new_coro); |
163 | |
204 | |