499bf01c |
1 | /* |
2 | * GINGE - GINGE Is Not Gp2x Emulator |
3 | * (C) notaz, 2010-2011 |
4 | * |
5 | * This work is licensed under the MAME license, see COPYING file for details. |
6 | */ |
7fd42181 |
7 | #include <stdio.h> |
8 | #include <stdlib.h> |
4d045184 |
9 | #include <stdarg.h> |
7fd42181 |
10 | #include <string.h> |
11 | #include <sys/types.h> |
12 | #include <sys/stat.h> |
13 | #include <fcntl.h> |
14 | #include <sys/mman.h> |
15 | #include <unistd.h> |
16 | #include <sys/ioctl.h> |
17 | #include <signal.h> |
18 | #include <termios.h> |
3ef07128 |
19 | #include <errno.h> |
7fd42181 |
20 | |
21 | #include "realfuncs.h" |
22 | #include "header.h" |
23 | |
24 | #if (DBG & 1) |
25 | #define strace printf |
26 | #else |
27 | #define strace(...) |
28 | #endif |
29 | |
30 | #define UNUSED __attribute__((unused)) |
31 | |
32 | static const struct dev_fd_t takeover_devs[] = { |
33 | { "/dev/mem", FAKEDEV_MEM }, |
34 | { "/dev/GPIO", FAKEDEV_GPIO }, |
35 | { "/dev/fb0", FAKEDEV_FB0 }, |
36 | { "/dev/fb/0", FAKEDEV_FB0 }, |
37 | { "/dev/fb1", FAKEDEV_FB1 }, |
38 | { "/dev/fb/1", FAKEDEV_FB1 }, |
39 | { "/dev/mmuhack", FAKEDEV_MMUHACK }, |
ac8e92a4 |
40 | { "/dev/tty", FAKEDEV_TTY0 }, |
7fd42181 |
41 | { "/dev/tty0", FAKEDEV_TTY0 }, |
7000b522 |
42 | #ifdef PND |
43 | { "/dev/input/event*", -1 }, // hide for now, may cause dupe events |
44 | #endif |
7fd42181 |
45 | }; |
46 | |
47 | static int w_open(const char *pathname, int flags, mode_t mode) |
48 | { |
49 | int i, ret; |
50 | |
51 | for (i = 0; i < ARRAY_SIZE(takeover_devs); i++) { |
7000b522 |
52 | const char *p, *oname; |
53 | int len; |
54 | |
55 | oname = takeover_devs[i].name; |
56 | p = strchr(oname, '*'); |
57 | if (p != NULL) |
58 | len = p - oname; |
59 | else |
60 | len = strlen(oname) + 1; |
61 | |
62 | if (strncmp(pathname, oname, len) == 0) { |
7fd42181 |
63 | ret = takeover_devs[i].fd; |
64 | break; |
65 | } |
66 | } |
67 | |
68 | if (i == ARRAY_SIZE(takeover_devs)) |
69 | ret = open(pathname, flags, mode); |
70 | |
71 | if (ret >= 0) { |
72 | for (i = 0; emu_interesting_fds[i].name != NULL; i++) { |
7000b522 |
73 | struct dev_fd_t *eifd = &emu_interesting_fds[i]; |
74 | if (strcmp(pathname, eifd->name) == 0) { |
75 | eifd->fd = ret; |
76 | if (eifd->open_cb != NULL) |
77 | eifd->open_cb(ret); |
7fd42181 |
78 | break; |
79 | } |
80 | } |
81 | } |
82 | |
83 | strace("open(%s) = %d\n", pathname, ret); |
84 | return ret; |
85 | } |
86 | |
87 | static void *w_mmap(void *addr, size_t length, int prot, int flags, int fd, off_t offset) |
88 | { |
89 | void *ret; |
90 | if (FAKEDEV_MEM <= fd && fd < FAKEDEV_FD_BOUNDARY) |
91 | ret = emu_do_mmap(length, prot, flags, fd, offset); |
92 | else |
93 | ret = mmap(addr, length, prot, flags, fd, offset); |
94 | |
95 | // threads are using heap before they mmap their stack |
96 | // printf needs valid stack for pthread/errno |
97 | if (((long)&ret & 0xf0000000) == 0xb0000000) |
98 | strace("mmap(%p, %x, %x, %x, %d, %lx) = %p\n", addr, length, prot, flags, fd, (long)offset, ret); |
99 | return ret; |
100 | } |
101 | #define w_mmap2 w_mmap |
102 | |
3ef07128 |
103 | static int w_munmap(void *addr, size_t length) |
104 | { |
105 | int ret; |
106 | ret = emu_do_munmap(addr, length); |
107 | if (ret == -EAGAIN) |
108 | ret = munmap(addr, length); |
109 | |
110 | if (((long)&ret & 0xf0000000) == 0xb0000000) |
111 | strace("munmap(%p, %x) = %d\n", addr, length, ret); |
112 | return ret; |
113 | } |
114 | |
7fd42181 |
115 | static ssize_t w_read(int fd, void *buf, size_t count) |
116 | { |
117 | ssize_t ret; |
118 | if (fd == FAKEDEV_GPIO) |
119 | ret = emu_read_gpiodev(buf, count); |
120 | else |
121 | ret = read(fd, buf, count); |
122 | |
123 | //strace("read(%d, %p, %d) = %d\n", fd, buf, count, ret); |
124 | return ret; |
125 | } |
126 | |
127 | static int w_ioctl(int fd, int request, void *argp) |
128 | { |
129 | int ret; |
130 | |
131 | if ((FAKEDEV_MEM <= fd && fd < FAKEDEV_FD_BOUNDARY) || |
132 | fd == emu_interesting_fds[IFD_SOUND].fd) |
133 | ret = emu_do_ioctl(fd, request, argp); |
134 | else |
135 | ret = ioctl(fd, request, argp); |
136 | |
137 | strace("ioctl(%d, %08x, %p) = %d\n", fd, request, argp, ret); |
138 | return ret; |
139 | } |
140 | |
141 | static int w_sigaction(int signum, const void *act, void *oldact) |
142 | { |
143 | strace("sigaction(%d, %p, %p) = %d\n", signum, act, oldact, 0); |
144 | return 0; |
145 | } |
146 | |
147 | /* dynamic only */ |
148 | static UNUSED int w_tcgetattr(int fd, struct termios *termios_p) |
149 | { |
150 | int ret; |
151 | if (fd != FAKEDEV_TTY0) |
152 | ret = tcgetattr(fd, termios_p); |
153 | else |
154 | ret = 0; |
155 | |
156 | strace("tcgetattr(%d, %p) = %d\n", fd, termios_p, ret); |
157 | return ret; |
158 | } |
159 | |
160 | static UNUSED int w_tcsetattr(int fd, int optional_actions, |
161 | const struct termios *termios_p) |
162 | { |
163 | int ret; |
164 | if (fd != FAKEDEV_TTY0) |
165 | ret = tcsetattr(fd, optional_actions, termios_p); |
166 | else |
167 | ret = 0; |
168 | |
169 | strace("tcsetattr(%d, %x, %p) = %d\n", fd, optional_actions, termios_p, ret); |
170 | return ret; |
171 | } |
172 | |
173 | static UNUSED FILE *w_fopen(const char *path, const char *mode) |
174 | { |
175 | FILE *ret = emu_do_fopen(path, mode); |
176 | strace("fopen(%s, %s) = %p\n", path, mode, ret); |
177 | return ret; |
178 | } |
179 | |
180 | static UNUSED int w_system(const char *command) |
181 | { |
182 | int ret = emu_do_system(command); |
183 | strace("system(%s) = %d\n", command, ret); |
184 | return ret; |
185 | } |
186 | |
7000b522 |
187 | extern char **environ; |
188 | |
db9191ed |
189 | static UNUSED int w_execl(const char *path, const char *arg, ...) |
190 | { |
191 | // don't allow exec (for now) |
192 | strace("execl(%s, %s, ...) = ?\n", path, arg); |
7000b522 |
193 | exit(1); |
db9191ed |
194 | } |
195 | |
196 | static UNUSED int w_execlp(const char *file, const char *arg, ...) |
197 | { |
198 | strace("execlp(%s, %s, ...) = ?\n", file, arg); |
7000b522 |
199 | exit(1); |
200 | } |
201 | |
202 | static UNUSED int w_execle(const char *path, const char *arg, ...) |
203 | { |
204 | strace("execle(%s, %s, ...) = ?\n", path, arg); |
205 | exit(1); |
206 | } |
207 | |
208 | static UNUSED int w_execv(const char *path, char *const argv[]) |
209 | { |
210 | strace("execv(%s, %p) = ?\n", path, argv); |
211 | return emu_do_execve(path, argv, environ); |
212 | } |
213 | |
214 | static UNUSED int w_execvp(const char *file, char *const argv[]) |
215 | { |
216 | strace("execvp(%s, %p) = ?\n", file, argv); |
217 | return emu_do_execve(file, argv, environ); |
db9191ed |
218 | } |
219 | |
220 | // static note: this can't safely return because of the way it's patched in |
221 | // static note2: can't be used, execve hangs? |
222 | static UNUSED int w_execve(const char *filename, char *const argv[], |
223 | char *const envp[]) |
224 | { |
225 | strace("execve(%s, %p, %p) = ?\n", filename, argv, envp); |
7000b522 |
226 | return emu_do_execve(filename, argv, envp); |
db9191ed |
227 | } |
228 | |
229 | static int w_chdir(const char *path) |
230 | { |
231 | int ret; |
232 | if (path != NULL && strstr(path, "/usr/gp2x") != NULL) |
233 | ret = 0; |
234 | else |
235 | ret = chdir(path); |
236 | strace("chdir(%s) = %d\n", path, ret); |
237 | return ret; |
238 | } |
239 | |
7fd42181 |
240 | #undef open |
241 | #undef fopen |
242 | #undef mmap |
3ef07128 |
243 | #undef munmap |
7fd42181 |
244 | #undef read |
245 | #undef ioctl |
246 | #undef sigaction |
247 | #undef tcgetattr |
248 | #undef tcsetattr |
249 | #undef system |
db9191ed |
250 | #undef execl |
251 | #undef execlp |
7000b522 |
252 | #undef execle |
253 | #undef execv |
254 | #undef execvp |
db9191ed |
255 | #undef execve |
256 | #undef chdir |
7fd42181 |
257 | |
258 | #ifdef DL |
259 | |
db9191ed |
260 | #define MAKE_WRAP_SYM_N(sym) \ |
7fd42181 |
261 | /* alias wrap symbols to real names */ \ |
db9191ed |
262 | typeof(sym) sym __attribute__((alias("w_" #sym))) |
263 | |
264 | #define MAKE_WRAP_SYM(sym) \ |
265 | MAKE_WRAP_SYM_N(sym); \ |
7fd42181 |
266 | /* wrapper to real functions, to be set up on load */ \ |
267 | static typeof(sym) *p_real_##sym |
268 | |
4d045184 |
269 | // note: update symver too |
7fd42181 |
270 | MAKE_WRAP_SYM(open); |
271 | MAKE_WRAP_SYM(fopen); |
272 | MAKE_WRAP_SYM(mmap); |
3ef07128 |
273 | MAKE_WRAP_SYM(munmap); |
7fd42181 |
274 | MAKE_WRAP_SYM(read); |
275 | MAKE_WRAP_SYM(ioctl); |
276 | MAKE_WRAP_SYM(sigaction); |
277 | MAKE_WRAP_SYM(tcgetattr); |
278 | MAKE_WRAP_SYM(tcsetattr); |
279 | MAKE_WRAP_SYM(system); |
db9191ed |
280 | MAKE_WRAP_SYM_N(execl); |
281 | MAKE_WRAP_SYM_N(execlp); |
7000b522 |
282 | MAKE_WRAP_SYM_N(execle); |
283 | MAKE_WRAP_SYM_N(execv); |
284 | MAKE_WRAP_SYM_N(execvp); |
db9191ed |
285 | MAKE_WRAP_SYM(execve); |
286 | MAKE_WRAP_SYM(chdir); |
7fd42181 |
287 | typeof(mmap) mmap2 __attribute__((alias("w_mmap"))); |
288 | |
289 | #define REAL_FUNC_NP(name) \ |
290 | { #name, (void **)&p_real_##name } |
291 | |
292 | static const struct { |
293 | const char *name; |
294 | void **func_ptr; |
295 | } real_funcs_np[] = { |
296 | REAL_FUNC_NP(open), |
297 | REAL_FUNC_NP(fopen), |
298 | REAL_FUNC_NP(mmap), |
3ef07128 |
299 | REAL_FUNC_NP(munmap), |
7fd42181 |
300 | REAL_FUNC_NP(read), |
301 | REAL_FUNC_NP(ioctl), |
302 | REAL_FUNC_NP(sigaction), |
303 | REAL_FUNC_NP(tcgetattr), |
304 | REAL_FUNC_NP(tcsetattr), |
305 | REAL_FUNC_NP(system), |
db9191ed |
306 | // exec* - skipped |
307 | REAL_FUNC_NP(execve), |
308 | REAL_FUNC_NP(chdir), |
7fd42181 |
309 | }; |
310 | |
311 | #define open p_real_open |
312 | #define fopen p_real_fopen |
313 | #define mmap p_real_mmap |
3ef07128 |
314 | #define munmap p_real_munmap |
7fd42181 |
315 | #define read p_real_read |
316 | #define ioctl p_real_ioctl |
317 | #define sigaction p_real_sigaction |
318 | #define tcgetattr p_real_tcgetattr |
319 | #define tcsetattr p_real_tcsetattr |
320 | #define system p_real_system |
db9191ed |
321 | #define execve p_real_execve |
322 | #define chdir p_real_chdir |
7fd42181 |
323 | |
324 | #undef MAKE_WRAP_SYM |
325 | #undef REAL_FUNC_NP |
326 | |
327 | #endif |
328 | |
329 | // just call real funcs for static, pointer for dynamic |
4d045184 |
330 | int real_open(const char *pathname, int flags, ...) |
7fd42181 |
331 | { |
4d045184 |
332 | va_list ap; |
333 | mode_t mode; |
334 | |
335 | va_start(ap, flags); |
336 | mode = va_arg(ap, mode_t); |
337 | va_end(ap); |
7fd42181 |
338 | return open(pathname, flags, mode); |
339 | } |
340 | |
341 | FILE *real_fopen(const char *path, const char *mode) |
342 | { |
343 | return fopen(path, mode); |
344 | } |
345 | |
346 | void *real_mmap(void *addr, size_t length, int prot, int flags, int fd, off_t offset) |
347 | { |
348 | return mmap(addr, length, prot, flags, fd, offset); |
349 | } |
350 | |
3ef07128 |
351 | int real_munmap(void *addr, size_t length) |
352 | { |
353 | return munmap(addr, length); |
354 | } |
355 | |
7fd42181 |
356 | int real_read(int fd, void *buf, size_t count) |
357 | { |
358 | return read(fd, buf, count); |
359 | } |
360 | |
361 | int real_ioctl(int d, int request, void *argp) |
362 | { |
363 | return ioctl(d, request, argp); |
364 | } |
365 | |
366 | int real_sigaction(int signum, const sigaction_t *act, sigaction_t *oldact) |
367 | { |
368 | return sigaction(signum, act, oldact); |
369 | } |
370 | |
371 | int real_tcgetattr(int fd, struct termios *termios_p) |
372 | { |
373 | return tcgetattr(fd, termios_p); |
374 | } |
375 | |
376 | int real_tcsetattr(int fd, int optional_actions, |
377 | const struct termios *termios_p) |
378 | { |
379 | return tcsetattr(fd, optional_actions, termios_p); |
380 | } |
381 | |
382 | int real_system(const char *command) |
383 | { |
384 | return system(command); |
385 | } |
db9191ed |
386 | |
387 | // real_exec* is missing intentionally - we don't need them |
388 | |
389 | int real_execve(const char *filename, char *const argv[], |
390 | char *const envp[]) |
391 | { |
392 | return execve(filename, argv, envp); |
393 | } |
394 | |
395 | int real_chdir(const char *path) |
396 | { |
397 | return chdir(path); |
398 | } |
499bf01c |
399 | |
400 | // vim:shiftwidth=2:expandtab |