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Commit | Line | Data |
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a87295e8 PB |
1 | /* |
2 | * m68k/ColdFire Semihosting syscall interface | |
5fafdf24 | 3 | * |
a87295e8 PB |
4 | * Copyright (c) 2005-2007 CodeSourcery. |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
8167ee88 | 17 | * along with this program; if not, see <http://www.gnu.org/licenses/>. |
a87295e8 PB |
18 | */ |
19 | ||
d8416665 | 20 | #include "qemu/osdep.h" |
a87295e8 PB |
21 | |
22 | #include "cpu.h" | |
23 | #if defined(CONFIG_USER_ONLY) | |
24 | #include "qemu.h" | |
25 | #define SEMIHOSTING_HEAP_SIZE (128 * 1024 * 1024) | |
26 | #else | |
87ecb68b | 27 | #include "qemu-common.h" |
022c62cb PB |
28 | #include "exec/gdbstub.h" |
29 | #include "exec/softmmu-semi.h" | |
a87295e8 | 30 | #endif |
9c17d615 | 31 | #include "sysemu/sysemu.h" |
a87295e8 PB |
32 | |
33 | #define HOSTED_EXIT 0 | |
34 | #define HOSTED_INIT_SIM 1 | |
35 | #define HOSTED_OPEN 2 | |
36 | #define HOSTED_CLOSE 3 | |
37 | #define HOSTED_READ 4 | |
38 | #define HOSTED_WRITE 5 | |
39 | #define HOSTED_LSEEK 6 | |
40 | #define HOSTED_RENAME 7 | |
41 | #define HOSTED_UNLINK 8 | |
42 | #define HOSTED_STAT 9 | |
43 | #define HOSTED_FSTAT 10 | |
44 | #define HOSTED_GETTIMEOFDAY 11 | |
45 | #define HOSTED_ISATTY 12 | |
46 | #define HOSTED_SYSTEM 13 | |
47 | ||
c227f099 AL |
48 | typedef uint32_t gdb_mode_t; |
49 | typedef uint32_t gdb_time_t; | |
a87295e8 PB |
50 | |
51 | struct m68k_gdb_stat { | |
52 | uint32_t gdb_st_dev; /* device */ | |
53 | uint32_t gdb_st_ino; /* inode */ | |
c227f099 | 54 | gdb_mode_t gdb_st_mode; /* protection */ |
a87295e8 PB |
55 | uint32_t gdb_st_nlink; /* number of hard links */ |
56 | uint32_t gdb_st_uid; /* user ID of owner */ | |
57 | uint32_t gdb_st_gid; /* group ID of owner */ | |
58 | uint32_t gdb_st_rdev; /* device type (if inode device) */ | |
59 | uint64_t gdb_st_size; /* total size, in bytes */ | |
60 | uint64_t gdb_st_blksize; /* blocksize for filesystem I/O */ | |
61 | uint64_t gdb_st_blocks; /* number of blocks allocated */ | |
c227f099 AL |
62 | gdb_time_t gdb_st_atime; /* time of last access */ |
63 | gdb_time_t gdb_st_mtime; /* time of last modification */ | |
64 | gdb_time_t gdb_st_ctime; /* time of last change */ | |
541dc0d4 | 65 | } QEMU_PACKED; |
a87295e8 PB |
66 | |
67 | struct gdb_timeval { | |
c227f099 | 68 | gdb_time_t tv_sec; /* second */ |
a87295e8 | 69 | uint64_t tv_usec; /* microsecond */ |
541dc0d4 | 70 | } QEMU_PACKED; |
a87295e8 PB |
71 | |
72 | #define GDB_O_RDONLY 0x0 | |
73 | #define GDB_O_WRONLY 0x1 | |
74 | #define GDB_O_RDWR 0x2 | |
75 | #define GDB_O_APPEND 0x8 | |
76 | #define GDB_O_CREAT 0x200 | |
77 | #define GDB_O_TRUNC 0x400 | |
78 | #define GDB_O_EXCL 0x800 | |
79 | ||
80 | static int translate_openflags(int flags) | |
81 | { | |
82 | int hf; | |
83 | ||
84 | if (flags & GDB_O_WRONLY) | |
85 | hf = O_WRONLY; | |
86 | else if (flags & GDB_O_RDWR) | |
87 | hf = O_RDWR; | |
88 | else | |
89 | hf = O_RDONLY; | |
90 | ||
91 | if (flags & GDB_O_APPEND) hf |= O_APPEND; | |
92 | if (flags & GDB_O_CREAT) hf |= O_CREAT; | |
93 | if (flags & GDB_O_TRUNC) hf |= O_TRUNC; | |
94 | if (flags & GDB_O_EXCL) hf |= O_EXCL; | |
95 | ||
96 | return hf; | |
97 | } | |
98 | ||
71fc85e8 | 99 | static void translate_stat(CPUM68KState *env, target_ulong addr, struct stat *s) |
a87295e8 PB |
100 | { |
101 | struct m68k_gdb_stat *p; | |
102 | ||
579a97f7 FB |
103 | if (!(p = lock_user(VERIFY_WRITE, addr, sizeof(struct m68k_gdb_stat), 0))) |
104 | /* FIXME - should this return an error code? */ | |
105 | return; | |
a87295e8 PB |
106 | p->gdb_st_dev = cpu_to_be32(s->st_dev); |
107 | p->gdb_st_ino = cpu_to_be32(s->st_ino); | |
108 | p->gdb_st_mode = cpu_to_be32(s->st_mode); | |
109 | p->gdb_st_nlink = cpu_to_be32(s->st_nlink); | |
110 | p->gdb_st_uid = cpu_to_be32(s->st_uid); | |
111 | p->gdb_st_gid = cpu_to_be32(s->st_gid); | |
112 | p->gdb_st_rdev = cpu_to_be32(s->st_rdev); | |
113 | p->gdb_st_size = cpu_to_be64(s->st_size); | |
29b3a662 PB |
114 | #ifdef _WIN32 |
115 | /* Windows stat is missing some fields. */ | |
116 | p->gdb_st_blksize = 0; | |
117 | p->gdb_st_blocks = 0; | |
118 | #else | |
a87295e8 PB |
119 | p->gdb_st_blksize = cpu_to_be64(s->st_blksize); |
120 | p->gdb_st_blocks = cpu_to_be64(s->st_blocks); | |
29b3a662 | 121 | #endif |
a87295e8 PB |
122 | p->gdb_st_atime = cpu_to_be32(s->st_atime); |
123 | p->gdb_st_mtime = cpu_to_be32(s->st_mtime); | |
124 | p->gdb_st_ctime = cpu_to_be32(s->st_ctime); | |
125 | unlock_user(p, addr, sizeof(struct m68k_gdb_stat)); | |
126 | } | |
127 | ||
1073bfd8 PM |
128 | static void m68k_semi_return_u32(CPUM68KState *env, uint32_t ret, uint32_t err) |
129 | { | |
130 | target_ulong args = env->dregs[1]; | |
131 | if (put_user_u32(ret, args) || | |
132 | put_user_u32(err, args + 4)) { | |
133 | /* The m68k semihosting ABI does not provide any way to report this | |
134 | * error to the guest, so the best we can do is log it in qemu. | |
135 | * It is always a guest error not to pass us a valid argument block. | |
136 | */ | |
137 | qemu_log_mask(LOG_GUEST_ERROR, "m68k-semihosting: return value " | |
138 | "discarded because argument block not writable\n"); | |
139 | } | |
140 | } | |
141 | ||
142 | static void m68k_semi_return_u64(CPUM68KState *env, uint64_t ret, uint32_t err) | |
143 | { | |
144 | target_ulong args = env->dregs[1]; | |
145 | if (put_user_u32(ret >> 32, args) || | |
146 | put_user_u32(ret, args + 4) || | |
147 | put_user_u32(err, args + 8)) { | |
148 | /* No way to report this via m68k semihosting ABI; just log it */ | |
149 | qemu_log_mask(LOG_GUEST_ERROR, "m68k-semihosting: return value " | |
150 | "discarded because argument block not writable\n"); | |
151 | } | |
152 | } | |
153 | ||
a87295e8 PB |
154 | static int m68k_semi_is_fseek; |
155 | ||
9e0c5422 | 156 | static void m68k_semi_cb(CPUState *cs, target_ulong ret, target_ulong err) |
a87295e8 | 157 | { |
9e0c5422 AF |
158 | M68kCPU *cpu = M68K_CPU(cs); |
159 | CPUM68KState *env = &cpu->env; | |
160 | ||
a87295e8 PB |
161 | if (m68k_semi_is_fseek) { |
162 | /* FIXME: We've already lost the high bits of the fseek | |
163 | return value. */ | |
1073bfd8 | 164 | m68k_semi_return_u64(env, ret, err); |
a87295e8 | 165 | m68k_semi_is_fseek = 0; |
1073bfd8 PM |
166 | } else { |
167 | m68k_semi_return_u32(env, ret, err); | |
a87295e8 | 168 | } |
a87295e8 PB |
169 | } |
170 | ||
7ba6c104 PM |
171 | /* Read the input value from the argument block; fail the semihosting |
172 | * call if the memory read fails. | |
173 | */ | |
174 | #define GET_ARG(n) do { \ | |
175 | if (get_user_ual(arg ## n, args + (n) * 4)) { \ | |
176 | result = -1; \ | |
177 | errno = EFAULT; \ | |
178 | goto failed; \ | |
179 | } \ | |
180 | } while (0) | |
181 | ||
a87295e8 PB |
182 | void do_m68k_semihosting(CPUM68KState *env, int nr) |
183 | { | |
184 | uint32_t args; | |
7ba6c104 | 185 | target_ulong arg0, arg1, arg2, arg3; |
a87295e8 PB |
186 | void *p; |
187 | void *q; | |
188 | uint32_t len; | |
189 | uint32_t result; | |
190 | ||
191 | args = env->dregs[1]; | |
192 | switch (nr) { | |
193 | case HOSTED_EXIT: | |
0e1c9c54 | 194 | gdb_exit(env, env->dregs[0]); |
a87295e8 PB |
195 | exit(env->dregs[0]); |
196 | case HOSTED_OPEN: | |
7ba6c104 PM |
197 | GET_ARG(0); |
198 | GET_ARG(1); | |
199 | GET_ARG(2); | |
200 | GET_ARG(3); | |
a87295e8 | 201 | if (use_gdb_syscalls()) { |
7ba6c104 PM |
202 | gdb_do_syscall(m68k_semi_cb, "open,%s,%x,%x", arg0, (int)arg1, |
203 | arg2, arg3); | |
a87295e8 PB |
204 | return; |
205 | } else { | |
7ba6c104 PM |
206 | p = lock_user_string(arg0); |
207 | if (!p) { | |
579a97f7 FB |
208 | /* FIXME - check error code? */ |
209 | result = -1; | |
210 | } else { | |
7ba6c104 PM |
211 | result = open(p, translate_openflags(arg2), arg3); |
212 | unlock_user(p, arg0, 0); | |
579a97f7 | 213 | } |
a87295e8 PB |
214 | } |
215 | break; | |
216 | case HOSTED_CLOSE: | |
217 | { | |
218 | /* Ignore attempts to close stdin/out/err. */ | |
7ba6c104 PM |
219 | GET_ARG(0); |
220 | int fd = arg0; | |
a87295e8 PB |
221 | if (fd > 2) { |
222 | if (use_gdb_syscalls()) { | |
7ba6c104 | 223 | gdb_do_syscall(m68k_semi_cb, "close,%x", arg0); |
a87295e8 PB |
224 | return; |
225 | } else { | |
226 | result = close(fd); | |
227 | } | |
228 | } else { | |
229 | result = 0; | |
230 | } | |
231 | break; | |
232 | } | |
233 | case HOSTED_READ: | |
7ba6c104 PM |
234 | GET_ARG(0); |
235 | GET_ARG(1); | |
236 | GET_ARG(2); | |
237 | len = arg2; | |
a87295e8 PB |
238 | if (use_gdb_syscalls()) { |
239 | gdb_do_syscall(m68k_semi_cb, "read,%x,%x,%x", | |
7ba6c104 | 240 | arg0, arg1, len); |
a87295e8 PB |
241 | return; |
242 | } else { | |
7ba6c104 PM |
243 | p = lock_user(VERIFY_WRITE, arg1, len, 0); |
244 | if (!p) { | |
579a97f7 FB |
245 | /* FIXME - check error code? */ |
246 | result = -1; | |
247 | } else { | |
7ba6c104 PM |
248 | result = read(arg0, p, len); |
249 | unlock_user(p, arg1, len); | |
579a97f7 | 250 | } |
a87295e8 PB |
251 | } |
252 | break; | |
253 | case HOSTED_WRITE: | |
7ba6c104 PM |
254 | GET_ARG(0); |
255 | GET_ARG(1); | |
256 | GET_ARG(2); | |
257 | len = arg2; | |
a87295e8 PB |
258 | if (use_gdb_syscalls()) { |
259 | gdb_do_syscall(m68k_semi_cb, "write,%x,%x,%x", | |
7ba6c104 | 260 | arg0, arg1, len); |
a87295e8 PB |
261 | return; |
262 | } else { | |
7ba6c104 PM |
263 | p = lock_user(VERIFY_READ, arg1, len, 1); |
264 | if (!p) { | |
579a97f7 FB |
265 | /* FIXME - check error code? */ |
266 | result = -1; | |
267 | } else { | |
7ba6c104 PM |
268 | result = write(arg0, p, len); |
269 | unlock_user(p, arg0, 0); | |
579a97f7 | 270 | } |
a87295e8 PB |
271 | } |
272 | break; | |
273 | case HOSTED_LSEEK: | |
274 | { | |
275 | uint64_t off; | |
7ba6c104 PM |
276 | GET_ARG(0); |
277 | GET_ARG(1); | |
278 | GET_ARG(2); | |
279 | GET_ARG(3); | |
280 | off = (uint32_t)arg2 | ((uint64_t)arg1 << 32); | |
a87295e8 PB |
281 | if (use_gdb_syscalls()) { |
282 | m68k_semi_is_fseek = 1; | |
283 | gdb_do_syscall(m68k_semi_cb, "fseek,%x,%lx,%x", | |
7ba6c104 | 284 | arg0, off, arg3); |
a87295e8 | 285 | } else { |
7ba6c104 | 286 | off = lseek(arg0, off, arg3); |
1073bfd8 | 287 | m68k_semi_return_u64(env, off, errno); |
a87295e8 PB |
288 | } |
289 | return; | |
290 | } | |
291 | case HOSTED_RENAME: | |
7ba6c104 PM |
292 | GET_ARG(0); |
293 | GET_ARG(1); | |
294 | GET_ARG(2); | |
295 | GET_ARG(3); | |
a87295e8 | 296 | if (use_gdb_syscalls()) { |
5fafdf24 | 297 | gdb_do_syscall(m68k_semi_cb, "rename,%s,%s", |
7ba6c104 | 298 | arg0, (int)arg1, arg2, (int)arg3); |
a87295e8 PB |
299 | return; |
300 | } else { | |
7ba6c104 PM |
301 | p = lock_user_string(arg0); |
302 | q = lock_user_string(arg2); | |
579a97f7 FB |
303 | if (!p || !q) { |
304 | /* FIXME - check error code? */ | |
305 | result = -1; | |
306 | } else { | |
307 | result = rename(p, q); | |
308 | } | |
7ba6c104 PM |
309 | unlock_user(p, arg0, 0); |
310 | unlock_user(q, arg2, 0); | |
a87295e8 PB |
311 | } |
312 | break; | |
313 | case HOSTED_UNLINK: | |
7ba6c104 PM |
314 | GET_ARG(0); |
315 | GET_ARG(1); | |
a87295e8 PB |
316 | if (use_gdb_syscalls()) { |
317 | gdb_do_syscall(m68k_semi_cb, "unlink,%s", | |
7ba6c104 | 318 | arg0, (int)arg1); |
a87295e8 PB |
319 | return; |
320 | } else { | |
7ba6c104 PM |
321 | p = lock_user_string(arg0); |
322 | if (!p) { | |
579a97f7 FB |
323 | /* FIXME - check error code? */ |
324 | result = -1; | |
325 | } else { | |
326 | result = unlink(p); | |
7ba6c104 | 327 | unlock_user(p, arg0, 0); |
579a97f7 | 328 | } |
a87295e8 PB |
329 | } |
330 | break; | |
331 | case HOSTED_STAT: | |
7ba6c104 PM |
332 | GET_ARG(0); |
333 | GET_ARG(1); | |
334 | GET_ARG(2); | |
a87295e8 PB |
335 | if (use_gdb_syscalls()) { |
336 | gdb_do_syscall(m68k_semi_cb, "stat,%s,%x", | |
7ba6c104 | 337 | arg0, (int)arg1, arg2); |
a87295e8 PB |
338 | return; |
339 | } else { | |
340 | struct stat s; | |
7ba6c104 PM |
341 | p = lock_user_string(arg0); |
342 | if (!p) { | |
579a97f7 FB |
343 | /* FIXME - check error code? */ |
344 | result = -1; | |
345 | } else { | |
346 | result = stat(p, &s); | |
7ba6c104 | 347 | unlock_user(p, arg0, 0); |
579a97f7 | 348 | } |
a87295e8 | 349 | if (result == 0) { |
7ba6c104 | 350 | translate_stat(env, arg2, &s); |
a87295e8 PB |
351 | } |
352 | } | |
353 | break; | |
354 | case HOSTED_FSTAT: | |
7ba6c104 PM |
355 | GET_ARG(0); |
356 | GET_ARG(1); | |
a87295e8 PB |
357 | if (use_gdb_syscalls()) { |
358 | gdb_do_syscall(m68k_semi_cb, "fstat,%x,%x", | |
7ba6c104 | 359 | arg0, arg1); |
a87295e8 PB |
360 | return; |
361 | } else { | |
362 | struct stat s; | |
7ba6c104 | 363 | result = fstat(arg0, &s); |
a87295e8 | 364 | if (result == 0) { |
7ba6c104 | 365 | translate_stat(env, arg1, &s); |
a87295e8 PB |
366 | } |
367 | } | |
368 | break; | |
369 | case HOSTED_GETTIMEOFDAY: | |
7ba6c104 PM |
370 | GET_ARG(0); |
371 | GET_ARG(1); | |
a87295e8 PB |
372 | if (use_gdb_syscalls()) { |
373 | gdb_do_syscall(m68k_semi_cb, "gettimeofday,%x,%x", | |
7ba6c104 | 374 | arg0, arg1); |
a87295e8 PB |
375 | return; |
376 | } else { | |
29b3a662 | 377 | qemu_timeval tv; |
a87295e8 | 378 | struct gdb_timeval *p; |
29b3a662 | 379 | result = qemu_gettimeofday(&tv); |
a87295e8 | 380 | if (result != 0) { |
579a97f7 | 381 | if (!(p = lock_user(VERIFY_WRITE, |
7ba6c104 | 382 | arg0, sizeof(struct gdb_timeval), 0))) { |
579a97f7 FB |
383 | /* FIXME - check error code? */ |
384 | result = -1; | |
385 | } else { | |
386 | p->tv_sec = cpu_to_be32(tv.tv_sec); | |
387 | p->tv_usec = cpu_to_be64(tv.tv_usec); | |
7ba6c104 | 388 | unlock_user(p, arg0, sizeof(struct gdb_timeval)); |
579a97f7 | 389 | } |
a87295e8 PB |
390 | } |
391 | } | |
392 | break; | |
393 | case HOSTED_ISATTY: | |
7ba6c104 | 394 | GET_ARG(0); |
a87295e8 | 395 | if (use_gdb_syscalls()) { |
7ba6c104 | 396 | gdb_do_syscall(m68k_semi_cb, "isatty,%x", arg0); |
a87295e8 PB |
397 | return; |
398 | } else { | |
7ba6c104 | 399 | result = isatty(arg0); |
a87295e8 PB |
400 | } |
401 | break; | |
402 | case HOSTED_SYSTEM: | |
7ba6c104 PM |
403 | GET_ARG(0); |
404 | GET_ARG(1); | |
a87295e8 PB |
405 | if (use_gdb_syscalls()) { |
406 | gdb_do_syscall(m68k_semi_cb, "system,%s", | |
7ba6c104 | 407 | arg0, (int)arg1); |
a87295e8 PB |
408 | return; |
409 | } else { | |
7ba6c104 PM |
410 | p = lock_user_string(arg0); |
411 | if (!p) { | |
579a97f7 FB |
412 | /* FIXME - check error code? */ |
413 | result = -1; | |
414 | } else { | |
415 | result = system(p); | |
7ba6c104 | 416 | unlock_user(p, arg0, 0); |
579a97f7 | 417 | } |
a87295e8 PB |
418 | } |
419 | break; | |
420 | case HOSTED_INIT_SIM: | |
421 | #if defined(CONFIG_USER_ONLY) | |
422 | { | |
0429a971 AF |
423 | CPUState *cs = CPU(m68k_env_get_cpu(env)); |
424 | TaskState *ts = cs->opaque; | |
a87295e8 PB |
425 | /* Allocate the heap using sbrk. */ |
426 | if (!ts->heap_limit) { | |
5382a012 | 427 | abi_ulong ret; |
a87295e8 PB |
428 | uint32_t size; |
429 | uint32_t base; | |
430 | ||
431 | base = do_brk(0); | |
432 | size = SEMIHOSTING_HEAP_SIZE; | |
433 | /* Try a big heap, and reduce the size if that fails. */ | |
434 | for (;;) { | |
435 | ret = do_brk(base + size); | |
5382a012 | 436 | if (ret >= (base + size)) { |
a87295e8 | 437 | break; |
5382a012 | 438 | } |
a87295e8 PB |
439 | size >>= 1; |
440 | } | |
441 | ts->heap_limit = base + size; | |
442 | } | |
443 | /* This call may happen before we have writable memory, so return | |
444 | values directly in registers. */ | |
445 | env->dregs[1] = ts->heap_limit; | |
446 | env->aregs[7] = ts->stack_base; | |
447 | } | |
448 | #else | |
449 | /* FIXME: This is wrong for boards where RAM does not start at | |
450 | address zero. */ | |
451 | env->dregs[1] = ram_size; | |
452 | env->aregs[7] = ram_size; | |
453 | #endif | |
454 | return; | |
455 | default: | |
a47dddd7 | 456 | cpu_abort(CPU(m68k_env_get_cpu(env)), "Unsupported semihosting syscall %d\n", nr); |
a87295e8 PB |
457 | result = 0; |
458 | } | |
7ba6c104 | 459 | failed: |
1073bfd8 | 460 | m68k_semi_return_u32(env, result, errno); |
a87295e8 | 461 | } |