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Commit | Line | Data |
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a4f81979 FB |
1 | /* |
2 | * Arm "Angel" semihosting syscalls | |
5fafdf24 | 3 | * |
8e71621f PB |
4 | * Copyright (c) 2005, 2007 CodeSourcery. |
5 | * Written by Paul Brook. | |
a4f81979 FB |
6 | * |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program; if not, write to the Free Software | |
19 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
20 | */ | |
21 | ||
22 | #include <sys/types.h> | |
23 | #include <sys/stat.h> | |
24 | #include <fcntl.h> | |
25 | #include <unistd.h> | |
26 | #include <stdlib.h> | |
27 | #include <stdio.h> | |
28 | #include <time.h> | |
29 | ||
8e71621f PB |
30 | #include "cpu.h" |
31 | #ifdef CONFIG_USER_ONLY | |
a4f81979 FB |
32 | #include "qemu.h" |
33 | ||
34 | #define ARM_ANGEL_HEAP_SIZE (128 * 1024 * 1024) | |
8e71621f | 35 | #else |
87ecb68b PB |
36 | #include "qemu-common.h" |
37 | #include "sysemu.h" | |
38 | #include "gdbstub.h" | |
8e71621f | 39 | #endif |
a4f81979 FB |
40 | |
41 | #define SYS_OPEN 0x01 | |
42 | #define SYS_CLOSE 0x02 | |
43 | #define SYS_WRITEC 0x03 | |
44 | #define SYS_WRITE0 0x04 | |
45 | #define SYS_WRITE 0x05 | |
46 | #define SYS_READ 0x06 | |
47 | #define SYS_READC 0x07 | |
48 | #define SYS_ISTTY 0x09 | |
49 | #define SYS_SEEK 0x0a | |
50 | #define SYS_FLEN 0x0c | |
51 | #define SYS_TMPNAM 0x0d | |
52 | #define SYS_REMOVE 0x0e | |
53 | #define SYS_RENAME 0x0f | |
54 | #define SYS_CLOCK 0x10 | |
55 | #define SYS_TIME 0x11 | |
56 | #define SYS_SYSTEM 0x12 | |
57 | #define SYS_ERRNO 0x13 | |
58 | #define SYS_GET_CMDLINE 0x15 | |
59 | #define SYS_HEAPINFO 0x16 | |
60 | #define SYS_EXIT 0x18 | |
61 | ||
62 | #ifndef O_BINARY | |
63 | #define O_BINARY 0 | |
64 | #endif | |
65 | ||
a2d1ebaf PB |
66 | #define GDB_O_RDONLY 0x000 |
67 | #define GDB_O_WRONLY 0x001 | |
68 | #define GDB_O_RDWR 0x002 | |
69 | #define GDB_O_APPEND 0x008 | |
70 | #define GDB_O_CREAT 0x200 | |
71 | #define GDB_O_TRUNC 0x400 | |
72 | #define GDB_O_BINARY 0 | |
73 | ||
74 | static int gdb_open_modeflags[12] = { | |
75 | GDB_O_RDONLY, | |
76 | GDB_O_RDONLY | GDB_O_BINARY, | |
77 | GDB_O_RDWR, | |
78 | GDB_O_RDWR | GDB_O_BINARY, | |
79 | GDB_O_WRONLY | GDB_O_CREAT | GDB_O_TRUNC, | |
80 | GDB_O_WRONLY | GDB_O_CREAT | GDB_O_TRUNC | GDB_O_BINARY, | |
81 | GDB_O_RDWR | GDB_O_CREAT | GDB_O_TRUNC, | |
82 | GDB_O_RDWR | GDB_O_CREAT | GDB_O_TRUNC | GDB_O_BINARY, | |
83 | GDB_O_WRONLY | GDB_O_CREAT | GDB_O_APPEND, | |
84 | GDB_O_WRONLY | GDB_O_CREAT | GDB_O_APPEND | GDB_O_BINARY, | |
85 | GDB_O_RDWR | GDB_O_CREAT | GDB_O_APPEND, | |
86 | GDB_O_RDWR | GDB_O_CREAT | GDB_O_APPEND | GDB_O_BINARY | |
87 | }; | |
88 | ||
89 | static int open_modeflags[12] = { | |
a4f81979 FB |
90 | O_RDONLY, |
91 | O_RDONLY | O_BINARY, | |
92 | O_RDWR, | |
93 | O_RDWR | O_BINARY, | |
94 | O_WRONLY | O_CREAT | O_TRUNC, | |
95 | O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, | |
96 | O_RDWR | O_CREAT | O_TRUNC, | |
97 | O_RDWR | O_CREAT | O_TRUNC | O_BINARY, | |
98 | O_WRONLY | O_CREAT | O_APPEND, | |
99 | O_WRONLY | O_CREAT | O_APPEND | O_BINARY, | |
100 | O_RDWR | O_CREAT | O_APPEND, | |
101 | O_RDWR | O_CREAT | O_APPEND | O_BINARY | |
102 | }; | |
103 | ||
8e71621f | 104 | #ifdef CONFIG_USER_ONLY |
a4f81979 FB |
105 | static inline uint32_t set_swi_errno(TaskState *ts, uint32_t code) |
106 | { | |
8e71621f PB |
107 | if (code == (uint32_t)-1) |
108 | ts->swi_errno = errno; | |
109 | return code; | |
110 | } | |
111 | #else | |
112 | static inline uint32_t set_swi_errno(CPUState *env, uint32_t code) | |
113 | { | |
114 | return code; | |
115 | } | |
116 | ||
a87295e8 | 117 | #include "softmmu-semi.h" |
8e71621f | 118 | #endif |
a4f81979 | 119 | |
a2d1ebaf PB |
120 | static target_ulong arm_semi_syscall_len; |
121 | ||
33d9cc8a PB |
122 | #if !defined(CONFIG_USER_ONLY) |
123 | static target_ulong syscall_err; | |
124 | #endif | |
125 | ||
a2d1ebaf PB |
126 | static void arm_semi_cb(CPUState *env, target_ulong ret, target_ulong err) |
127 | { | |
128 | #ifdef CONFIG_USER_ONLY | |
129 | TaskState *ts = env->opaque; | |
130 | #endif | |
33d9cc8a | 131 | |
a2d1ebaf PB |
132 | if (ret == (target_ulong)-1) { |
133 | #ifdef CONFIG_USER_ONLY | |
134 | ts->swi_errno = err; | |
33d9cc8a PB |
135 | #else |
136 | syscall_err = err; | |
a2d1ebaf PB |
137 | #endif |
138 | env->regs[0] = ret; | |
139 | } else { | |
140 | /* Fixup syscalls that use nonstardard return conventions. */ | |
141 | switch (env->regs[0]) { | |
142 | case SYS_WRITE: | |
143 | case SYS_READ: | |
144 | env->regs[0] = arm_semi_syscall_len - ret; | |
145 | break; | |
146 | case SYS_SEEK: | |
147 | env->regs[0] = 0; | |
148 | break; | |
149 | default: | |
150 | env->regs[0] = ret; | |
151 | break; | |
152 | } | |
153 | } | |
154 | } | |
155 | ||
33d9cc8a PB |
156 | static void arm_semi_flen_cb(CPUState *env, target_ulong ret, target_ulong err) |
157 | { | |
158 | /* The size is always stored in big-endian order, extract | |
159 | the value. We assume the size always fit in 32 bits. */ | |
160 | uint32_t size; | |
161 | cpu_memory_rw_debug(env, env->regs[13]-64+32, (uint8_t *)&size, 4, 0); | |
162 | env->regs[0] = be32_to_cpu(size); | |
163 | #ifdef CONFIG_USER_ONLY | |
164 | ((TaskState *)env->opaque)->swi_errno = err; | |
165 | #else | |
166 | syscall_err = err; | |
167 | #endif | |
168 | } | |
169 | ||
2f619698 FB |
170 | #define ARG(n) \ |
171 | ({ \ | |
172 | target_ulong __arg; \ | |
173 | /* FIXME - handle get_user() failure */ \ | |
174 | get_user_ual(__arg, args + (n) * 4); \ | |
175 | __arg; \ | |
176 | }) | |
177 | #define SET_ARG(n, val) put_user_ual(val, args + (n) * 4) | |
a4f81979 FB |
178 | uint32_t do_arm_semihosting(CPUState *env) |
179 | { | |
53a5960a | 180 | target_ulong args; |
a4f81979 FB |
181 | char * s; |
182 | int nr; | |
183 | uint32_t ret; | |
8e71621f PB |
184 | uint32_t len; |
185 | #ifdef CONFIG_USER_ONLY | |
a4f81979 | 186 | TaskState *ts = env->opaque; |
8e71621f PB |
187 | #else |
188 | CPUState *ts = env; | |
189 | #endif | |
a4f81979 FB |
190 | |
191 | nr = env->regs[0]; | |
53a5960a | 192 | args = env->regs[1]; |
a4f81979 FB |
193 | switch (nr) { |
194 | case SYS_OPEN: | |
579a97f7 FB |
195 | if (!(s = lock_user_string(ARG(0)))) |
196 | /* FIXME - should this error code be -TARGET_EFAULT ? */ | |
197 | return (uint32_t)-1; | |
a4f81979 | 198 | if (ARG(1) >= 12) |
579a97f7 | 199 | return (uint32_t)-1; |
a4f81979 FB |
200 | if (strcmp(s, ":tt") == 0) { |
201 | if (ARG(1) < 4) | |
202 | return STDIN_FILENO; | |
203 | else | |
204 | return STDOUT_FILENO; | |
205 | } | |
a2d1ebaf | 206 | if (use_gdb_syscalls()) { |
5fafdf24 | 207 | gdb_do_syscall(arm_semi_cb, "open,%s,%x,1a4", ARG(0), |
33d9cc8a | 208 | (int)ARG(2)+1, gdb_open_modeflags[ARG(1)]); |
a2d1ebaf PB |
209 | return env->regs[0]; |
210 | } else { | |
211 | ret = set_swi_errno(ts, open(s, open_modeflags[ARG(1)], 0644)); | |
212 | } | |
8e71621f PB |
213 | unlock_user(s, ARG(0), 0); |
214 | return ret; | |
a4f81979 | 215 | case SYS_CLOSE: |
a2d1ebaf PB |
216 | if (use_gdb_syscalls()) { |
217 | gdb_do_syscall(arm_semi_cb, "close,%x", ARG(0)); | |
218 | return env->regs[0]; | |
219 | } else { | |
220 | return set_swi_errno(ts, close(ARG(0))); | |
221 | } | |
a4f81979 | 222 | case SYS_WRITEC: |
53a5960a | 223 | { |
2f619698 FB |
224 | char c; |
225 | ||
226 | if (get_user_u8(c, args)) | |
227 | /* FIXME - should this error code be -TARGET_EFAULT ? */ | |
228 | return (uint32_t)-1; | |
53a5960a | 229 | /* Write to debug console. stderr is near enough. */ |
a2d1ebaf PB |
230 | if (use_gdb_syscalls()) { |
231 | gdb_do_syscall(arm_semi_cb, "write,2,%x,1", args); | |
232 | return env->regs[0]; | |
233 | } else { | |
234 | return write(STDERR_FILENO, &c, 1); | |
235 | } | |
53a5960a | 236 | } |
a4f81979 | 237 | case SYS_WRITE0: |
579a97f7 FB |
238 | if (!(s = lock_user_string(args))) |
239 | /* FIXME - should this error code be -TARGET_EFAULT ? */ | |
240 | return (uint32_t)-1; | |
a2d1ebaf PB |
241 | len = strlen(s); |
242 | if (use_gdb_syscalls()) { | |
243 | gdb_do_syscall(arm_semi_cb, "write,2,%x,%x\n", args, len); | |
244 | ret = env->regs[0]; | |
245 | } else { | |
246 | ret = write(STDERR_FILENO, s, len); | |
247 | } | |
53a5960a PB |
248 | unlock_user(s, args, 0); |
249 | return ret; | |
a4f81979 | 250 | case SYS_WRITE: |
8e71621f | 251 | len = ARG(2); |
a2d1ebaf PB |
252 | if (use_gdb_syscalls()) { |
253 | arm_semi_syscall_len = len; | |
254 | gdb_do_syscall(arm_semi_cb, "write,%x,%x,%x", ARG(0), ARG(1), len); | |
255 | return env->regs[0]; | |
256 | } else { | |
579a97f7 FB |
257 | if (!(s = lock_user(VERIFY_READ, ARG(1), len, 1))) |
258 | /* FIXME - should this error code be -TARGET_EFAULT ? */ | |
259 | return (uint32_t)-1; | |
a2d1ebaf PB |
260 | ret = set_swi_errno(ts, write(ARG(0), s, len)); |
261 | unlock_user(s, ARG(1), 0); | |
262 | if (ret == (uint32_t)-1) | |
263 | return -1; | |
264 | return len - ret; | |
265 | } | |
a4f81979 | 266 | case SYS_READ: |
8e71621f | 267 | len = ARG(2); |
a2d1ebaf PB |
268 | if (use_gdb_syscalls()) { |
269 | arm_semi_syscall_len = len; | |
270 | gdb_do_syscall(arm_semi_cb, "read,%x,%x,%x", ARG(0), ARG(1), len); | |
271 | return env->regs[0]; | |
272 | } else { | |
579a97f7 FB |
273 | if (!(s = lock_user(VERIFY_WRITE, ARG(1), len, 0))) |
274 | /* FIXME - should this error code be -TARGET_EFAULT ? */ | |
275 | return (uint32_t)-1; | |
a2d1ebaf PB |
276 | do |
277 | ret = set_swi_errno(ts, read(ARG(0), s, len)); | |
278 | while (ret == -1 && errno == EINTR); | |
279 | unlock_user(s, ARG(1), len); | |
280 | if (ret == (uint32_t)-1) | |
281 | return -1; | |
282 | return len - ret; | |
283 | } | |
a4f81979 FB |
284 | case SYS_READC: |
285 | /* XXX: Read from debug cosole. Not implemented. */ | |
286 | return 0; | |
287 | case SYS_ISTTY: | |
a2d1ebaf PB |
288 | if (use_gdb_syscalls()) { |
289 | gdb_do_syscall(arm_semi_cb, "isatty,%x", ARG(0)); | |
290 | return env->regs[0]; | |
291 | } else { | |
292 | return isatty(ARG(0)); | |
293 | } | |
a4f81979 | 294 | case SYS_SEEK: |
a2d1ebaf | 295 | if (use_gdb_syscalls()) { |
33d9cc8a | 296 | gdb_do_syscall(arm_semi_cb, "lseek,%x,%x,0", ARG(0), ARG(1)); |
a2d1ebaf PB |
297 | return env->regs[0]; |
298 | } else { | |
299 | ret = set_swi_errno(ts, lseek(ARG(0), ARG(1), SEEK_SET)); | |
300 | if (ret == (uint32_t)-1) | |
301 | return -1; | |
302 | return 0; | |
303 | } | |
a4f81979 | 304 | case SYS_FLEN: |
a2d1ebaf | 305 | if (use_gdb_syscalls()) { |
5fafdf24 | 306 | gdb_do_syscall(arm_semi_flen_cb, "fstat,%x,%x", |
33d9cc8a PB |
307 | ARG(0), env->regs[13]-64); |
308 | return env->regs[0]; | |
a2d1ebaf | 309 | } else { |
a4f81979 FB |
310 | struct stat buf; |
311 | ret = set_swi_errno(ts, fstat(ARG(0), &buf)); | |
312 | if (ret == (uint32_t)-1) | |
313 | return -1; | |
314 | return buf.st_size; | |
315 | } | |
316 | case SYS_TMPNAM: | |
317 | /* XXX: Not implemented. */ | |
318 | return -1; | |
319 | case SYS_REMOVE: | |
a2d1ebaf | 320 | if (use_gdb_syscalls()) { |
33d9cc8a | 321 | gdb_do_syscall(arm_semi_cb, "unlink,%s", ARG(0), (int)ARG(1)+1); |
a2d1ebaf PB |
322 | ret = env->regs[0]; |
323 | } else { | |
579a97f7 FB |
324 | if (!(s = lock_user_string(ARG(0)))) |
325 | /* FIXME - should this error code be -TARGET_EFAULT ? */ | |
326 | return (uint32_t)-1; | |
a2d1ebaf PB |
327 | ret = set_swi_errno(ts, remove(s)); |
328 | unlock_user(s, ARG(0), 0); | |
329 | } | |
8e71621f | 330 | return ret; |
a4f81979 | 331 | case SYS_RENAME: |
a2d1ebaf PB |
332 | if (use_gdb_syscalls()) { |
333 | gdb_do_syscall(arm_semi_cb, "rename,%s,%s", | |
33d9cc8a | 334 | ARG(0), (int)ARG(1)+1, ARG(2), (int)ARG(3)+1); |
a2d1ebaf PB |
335 | return env->regs[0]; |
336 | } else { | |
8e71621f PB |
337 | char *s2; |
338 | s = lock_user_string(ARG(0)); | |
339 | s2 = lock_user_string(ARG(2)); | |
579a97f7 FB |
340 | if (!s || !s2) |
341 | /* FIXME - should this error code be -TARGET_EFAULT ? */ | |
342 | ret = (uint32_t)-1; | |
343 | else | |
344 | ret = set_swi_errno(ts, rename(s, s2)); | |
345 | if (s2) | |
346 | unlock_user(s2, ARG(2), 0); | |
347 | if (s) | |
348 | unlock_user(s, ARG(0), 0); | |
8e71621f PB |
349 | return ret; |
350 | } | |
a4f81979 FB |
351 | case SYS_CLOCK: |
352 | return clock() / (CLOCKS_PER_SEC / 100); | |
353 | case SYS_TIME: | |
354 | return set_swi_errno(ts, time(NULL)); | |
355 | case SYS_SYSTEM: | |
a2d1ebaf | 356 | if (use_gdb_syscalls()) { |
33d9cc8a | 357 | gdb_do_syscall(arm_semi_cb, "system,%s", ARG(0), (int)ARG(1)+1); |
a2d1ebaf PB |
358 | return env->regs[0]; |
359 | } else { | |
579a97f7 FB |
360 | if (!(s = lock_user_string(ARG(0)))) |
361 | /* FIXME - should this error code be -TARGET_EFAULT ? */ | |
362 | return (uint32_t)-1; | |
a2d1ebaf PB |
363 | ret = set_swi_errno(ts, system(s)); |
364 | unlock_user(s, ARG(0), 0); | |
a982b531 | 365 | return ret; |
a2d1ebaf | 366 | } |
a4f81979 | 367 | case SYS_ERRNO: |
8e71621f | 368 | #ifdef CONFIG_USER_ONLY |
a4f81979 | 369 | return ts->swi_errno; |
8e71621f | 370 | #else |
33d9cc8a | 371 | return syscall_err; |
8e71621f | 372 | #endif |
a4f81979 | 373 | case SYS_GET_CMDLINE: |
8e71621f | 374 | #ifdef CONFIG_USER_ONLY |
38d0662a PB |
375 | /* Build a commandline from the original argv. */ |
376 | { | |
377 | char **arg = ts->info->host_argv; | |
378 | int len = ARG(1); | |
379 | /* lock the buffer on the ARM side */ | |
579a97f7 FB |
380 | char *cmdline_buffer = (char*)lock_user(VERIFY_WRITE, ARG(0), len, 0); |
381 | ||
382 | if (!cmdline_buffer) | |
383 | /* FIXME - should this error code be -TARGET_EFAULT ? */ | |
384 | return (uint32_t)-1; | |
38d0662a PB |
385 | |
386 | s = cmdline_buffer; | |
387 | while (*arg && len > 2) { | |
388 | int n = strlen(*arg); | |
389 | ||
390 | if (s != cmdline_buffer) { | |
391 | *(s++) = ' '; | |
392 | len--; | |
393 | } | |
394 | if (n >= len) | |
395 | n = len - 1; | |
396 | memcpy(s, *arg, n); | |
397 | s += n; | |
398 | len -= n; | |
399 | arg++; | |
400 | } | |
401 | /* Null terminate the string. */ | |
402 | *s = 0; | |
403 | len = s - cmdline_buffer; | |
404 | ||
405 | /* Unlock the buffer on the ARM side. */ | |
406 | unlock_user(cmdline_buffer, ARG(0), len); | |
407 | ||
408 | /* Adjust the commandline length argument. */ | |
409 | SET_ARG(1, len); | |
410 | ||
411 | /* Return success if commandline fit into buffer. */ | |
412 | return *arg ? -1 : 0; | |
413 | } | |
8e71621f PB |
414 | #else |
415 | return -1; | |
416 | #endif | |
a4f81979 FB |
417 | case SYS_HEAPINFO: |
418 | { | |
419 | uint32_t *ptr; | |
420 | uint32_t limit; | |
421 | ||
8e71621f PB |
422 | #ifdef CONFIG_USER_ONLY |
423 | /* Some C libraries assume the heap immediately follows .bss, so | |
a4f81979 FB |
424 | allocate it using sbrk. */ |
425 | if (!ts->heap_limit) { | |
426 | long ret; | |
427 | ||
53a5960a | 428 | ts->heap_base = do_brk(0); |
a4f81979 FB |
429 | limit = ts->heap_base + ARM_ANGEL_HEAP_SIZE; |
430 | /* Try a big heap, and reduce the size if that fails. */ | |
431 | for (;;) { | |
53a5960a | 432 | ret = do_brk(limit); |
a4f81979 FB |
433 | if (ret != -1) |
434 | break; | |
435 | limit = (ts->heap_base >> 1) + (limit >> 1); | |
436 | } | |
437 | ts->heap_limit = limit; | |
438 | } | |
3b46e624 | 439 | |
579a97f7 FB |
440 | if (!(ptr = lock_user(VERIFY_WRITE, ARG(0), 16, 0))) |
441 | /* FIXME - should this error code be -TARGET_EFAULT ? */ | |
442 | return (uint32_t)-1; | |
a4f81979 FB |
443 | ptr[0] = tswap32(ts->heap_base); |
444 | ptr[1] = tswap32(ts->heap_limit); | |
445 | ptr[2] = tswap32(ts->stack_base); | |
446 | ptr[3] = tswap32(0); /* Stack limit. */ | |
8e71621f PB |
447 | unlock_user(ptr, ARG(0), 16); |
448 | #else | |
449 | limit = ram_size; | |
579a97f7 FB |
450 | if (!(ptr = lock_user(VERIFY_WRITE, ARG(0), 16, 0))) |
451 | /* FIXME - should this error code be -TARGET_EFAULT ? */ | |
452 | return (uint32_t)-1; | |
8e71621f PB |
453 | /* TODO: Make this use the limit of the loaded application. */ |
454 | ptr[0] = tswap32(limit / 2); | |
455 | ptr[1] = tswap32(limit); | |
456 | ptr[2] = tswap32(limit); /* Stack base */ | |
457 | ptr[3] = tswap32(0); /* Stack limit. */ | |
458 | unlock_user(ptr, ARG(0), 16); | |
459 | #endif | |
a4f81979 FB |
460 | return 0; |
461 | } | |
462 | case SYS_EXIT: | |
463 | exit(0); | |
464 | default: | |
465 | fprintf(stderr, "qemu: Unsupported SemiHosting SWI 0x%02x\n", nr); | |
466 | cpu_dump_state(env, stderr, fprintf, 0); | |
467 | abort(); | |
468 | } | |
469 | } |