Remove the target dependency introduced by previous patch
[qemu/qemu_0_9_1_stable.git] / m68k-semi.c
blobfc033a163570db28e14c2e3c8425293d4b2a60f6
1 /*
2 * m68k/ColdFire Semihosting syscall interface
4 * Copyright (c) 2005-2007 CodeSourcery.
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.
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.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21 #include <sys/types.h>
22 #include <sys/stat.h>
23 #include <errno.h>
24 #include <fcntl.h>
25 #include <unistd.h>
26 #include <stdlib.h>
27 #include <stdio.h>
28 #include <sys/time.h>
29 #include <time.h>
31 #include "cpu.h"
32 #if defined(CONFIG_USER_ONLY)
33 #include "qemu.h"
34 #define SEMIHOSTING_HEAP_SIZE (128 * 1024 * 1024)
35 #else
36 #include "vl.h"
37 #include "softmmu-semi.h"
38 #endif
40 #define HOSTED_EXIT 0
41 #define HOSTED_INIT_SIM 1
42 #define HOSTED_OPEN 2
43 #define HOSTED_CLOSE 3
44 #define HOSTED_READ 4
45 #define HOSTED_WRITE 5
46 #define HOSTED_LSEEK 6
47 #define HOSTED_RENAME 7
48 #define HOSTED_UNLINK 8
49 #define HOSTED_STAT 9
50 #define HOSTED_FSTAT 10
51 #define HOSTED_GETTIMEOFDAY 11
52 #define HOSTED_ISATTY 12
53 #define HOSTED_SYSTEM 13
55 typedef uint32_t gdb_mode_t;
56 typedef uint32_t gdb_time_t;
58 struct m68k_gdb_stat {
59 uint32_t gdb_st_dev; /* device */
60 uint32_t gdb_st_ino; /* inode */
61 gdb_mode_t gdb_st_mode; /* protection */
62 uint32_t gdb_st_nlink; /* number of hard links */
63 uint32_t gdb_st_uid; /* user ID of owner */
64 uint32_t gdb_st_gid; /* group ID of owner */
65 uint32_t gdb_st_rdev; /* device type (if inode device) */
66 uint64_t gdb_st_size; /* total size, in bytes */
67 uint64_t gdb_st_blksize; /* blocksize for filesystem I/O */
68 uint64_t gdb_st_blocks; /* number of blocks allocated */
69 gdb_time_t gdb_st_atime; /* time of last access */
70 gdb_time_t gdb_st_mtime; /* time of last modification */
71 gdb_time_t gdb_st_ctime; /* time of last change */
72 } __attribute__((packed));
74 struct gdb_timeval {
75 gdb_time_t tv_sec; /* second */
76 uint64_t tv_usec; /* microsecond */
77 } __attribute__((packed));
79 #define GDB_O_RDONLY 0x0
80 #define GDB_O_WRONLY 0x1
81 #define GDB_O_RDWR 0x2
82 #define GDB_O_APPEND 0x8
83 #define GDB_O_CREAT 0x200
84 #define GDB_O_TRUNC 0x400
85 #define GDB_O_EXCL 0x800
87 static int translate_openflags(int flags)
89 int hf;
91 if (flags & GDB_O_WRONLY)
92 hf = O_WRONLY;
93 else if (flags & GDB_O_RDWR)
94 hf = O_RDWR;
95 else
96 hf = O_RDONLY;
98 if (flags & GDB_O_APPEND) hf |= O_APPEND;
99 if (flags & GDB_O_CREAT) hf |= O_CREAT;
100 if (flags & GDB_O_TRUNC) hf |= O_TRUNC;
101 if (flags & GDB_O_EXCL) hf |= O_EXCL;
103 return hf;
106 static void translate_stat(CPUState *env, target_ulong addr, struct stat *s)
108 struct m68k_gdb_stat *p;
110 p = lock_user(addr, sizeof(struct m68k_gdb_stat), 0);
111 p->gdb_st_dev = cpu_to_be32(s->st_dev);
112 p->gdb_st_ino = cpu_to_be32(s->st_ino);
113 p->gdb_st_mode = cpu_to_be32(s->st_mode);
114 p->gdb_st_nlink = cpu_to_be32(s->st_nlink);
115 p->gdb_st_uid = cpu_to_be32(s->st_uid);
116 p->gdb_st_gid = cpu_to_be32(s->st_gid);
117 p->gdb_st_rdev = cpu_to_be32(s->st_rdev);
118 p->gdb_st_size = cpu_to_be64(s->st_size);
119 #ifdef _WIN32
120 /* Windows stat is missing some fields. */
121 p->gdb_st_blksize = 0;
122 p->gdb_st_blocks = 0;
123 #else
124 p->gdb_st_blksize = cpu_to_be64(s->st_blksize);
125 p->gdb_st_blocks = cpu_to_be64(s->st_blocks);
126 #endif
127 p->gdb_st_atime = cpu_to_be32(s->st_atime);
128 p->gdb_st_mtime = cpu_to_be32(s->st_mtime);
129 p->gdb_st_ctime = cpu_to_be32(s->st_ctime);
130 unlock_user(p, addr, sizeof(struct m68k_gdb_stat));
133 static int m68k_semi_is_fseek;
135 static void m68k_semi_cb(CPUState *env, target_ulong ret, target_ulong err)
137 target_ulong args;
139 args = env->dregs[1];
140 if (m68k_semi_is_fseek) {
141 /* FIXME: We've already lost the high bits of the fseek
142 return value. */
143 tput32(args, 0);
144 args += 4;
145 m68k_semi_is_fseek = 0;
147 tput32(args, ret);
148 tput32(args + 4, errno);
151 #define ARG(x) tget32(args + (x) * 4)
152 #define PARG(x) ((unsigned long)ARG(x))
153 void do_m68k_semihosting(CPUM68KState *env, int nr)
155 uint32_t args;
156 void *p;
157 void *q;
158 uint32_t len;
159 uint32_t result;
161 args = env->dregs[1];
162 switch (nr) {
163 case HOSTED_EXIT:
164 exit(env->dregs[0]);
165 case HOSTED_OPEN:
166 if (use_gdb_syscalls()) {
167 gdb_do_syscall(m68k_semi_cb, "open,%s,%x,%x", ARG(0), (int)ARG(1),
168 ARG(2), ARG(3));
169 return;
170 } else {
171 p = lock_user_string(ARG(0));
172 result = open(p, translate_openflags(ARG(2)), ARG(3));
173 unlock_user(p, ARG(0), 0);
175 break;
176 case HOSTED_CLOSE:
178 /* Ignore attempts to close stdin/out/err. */
179 int fd = ARG(0);
180 if (fd > 2) {
181 if (use_gdb_syscalls()) {
182 gdb_do_syscall(m68k_semi_cb, "close,%x", ARG(0));
183 return;
184 } else {
185 result = close(fd);
187 } else {
188 result = 0;
190 break;
192 case HOSTED_READ:
193 len = ARG(2);
194 if (use_gdb_syscalls()) {
195 gdb_do_syscall(m68k_semi_cb, "read,%x,%x,%x",
196 ARG(0), ARG(1), len);
197 return;
198 } else {
199 p = lock_user(ARG(1), len, 0);
200 result = read(ARG(0), p, len);
201 unlock_user(p, ARG(1), len);
203 break;
204 case HOSTED_WRITE:
205 len = ARG(2);
206 if (use_gdb_syscalls()) {
207 gdb_do_syscall(m68k_semi_cb, "write,%x,%x,%x",
208 ARG(0), ARG(1), len);
209 return;
210 } else {
211 p = lock_user(ARG(1), len, 1);
212 result = write(ARG(0), p, len);
213 unlock_user(p, ARG(0), 0);
215 break;
216 case HOSTED_LSEEK:
218 uint64_t off;
219 off = (uint32_t)ARG(2) | ((uint64_t)ARG(1) << 32);
220 if (use_gdb_syscalls()) {
221 m68k_semi_is_fseek = 1;
222 gdb_do_syscall(m68k_semi_cb, "fseek,%x,%lx,%x",
223 ARG(0), off, ARG(3));
224 } else {
225 off = lseek(ARG(0), off, ARG(3));
226 tput32(args, off >> 32);
227 tput32(args + 4, off);
228 tput32(args + 8, errno);
230 return;
232 case HOSTED_RENAME:
233 if (use_gdb_syscalls()) {
234 gdb_do_syscall(m68k_semi_cb, "rename,%s,%s",
235 ARG(0), (int)ARG(1), ARG(2), (int)ARG(3));
236 return;
237 } else {
238 p = lock_user_string(ARG(0));
239 q = lock_user_string(ARG(2));
240 result = rename(p, q);
241 unlock_user(p, ARG(0), 0);
242 unlock_user(q, ARG(2), 0);
244 break;
245 case HOSTED_UNLINK:
246 if (use_gdb_syscalls()) {
247 gdb_do_syscall(m68k_semi_cb, "unlink,%s",
248 ARG(0), (int)ARG(1));
249 return;
250 } else {
251 p = lock_user_string(ARG(0));
252 result = unlink(p);
253 unlock_user(p, ARG(0), 0);
255 break;
256 case HOSTED_STAT:
257 if (use_gdb_syscalls()) {
258 gdb_do_syscall(m68k_semi_cb, "stat,%s,%x",
259 ARG(0), (int)ARG(1), ARG(2));
260 return;
261 } else {
262 struct stat s;
263 p = lock_user_string(ARG(0));
264 result = stat(p, &s);
265 unlock_user(p, ARG(0), 0);
266 if (result == 0) {
267 translate_stat(env, ARG(2), &s);
270 break;
271 case HOSTED_FSTAT:
272 if (use_gdb_syscalls()) {
273 gdb_do_syscall(m68k_semi_cb, "fstat,%x,%x",
274 ARG(0), ARG(1));
275 return;
276 } else {
277 struct stat s;
278 result = fstat(ARG(0), &s);
279 if (result == 0) {
280 translate_stat(env, ARG(1), &s);
283 break;
284 case HOSTED_GETTIMEOFDAY:
285 if (use_gdb_syscalls()) {
286 gdb_do_syscall(m68k_semi_cb, "gettimeofday,%x,%x",
287 ARG(0), ARG(1));
288 return;
289 } else {
290 qemu_timeval tv;
291 struct gdb_timeval *p;
292 result = qemu_gettimeofday(&tv);
293 if (result != 0) {
294 p = lock_user(ARG(0), sizeof(struct gdb_timeval), 0);
295 p->tv_sec = cpu_to_be32(tv.tv_sec);
296 p->tv_usec = cpu_to_be64(tv.tv_usec);
297 unlock_user(p, ARG(0), sizeof(struct gdb_timeval));
300 break;
301 case HOSTED_ISATTY:
302 if (use_gdb_syscalls()) {
303 gdb_do_syscall(m68k_semi_cb, "isatty,%x", ARG(0));
304 return;
305 } else {
306 result = isatty(ARG(0));
308 break;
309 case HOSTED_SYSTEM:
310 if (use_gdb_syscalls()) {
311 gdb_do_syscall(m68k_semi_cb, "system,%s",
312 ARG(0), (int)ARG(1));
313 return;
314 } else {
315 p = lock_user_string(ARG(0));
316 result = system(p);
317 unlock_user(p, ARG(0), 0);
319 break;
320 case HOSTED_INIT_SIM:
321 #if defined(CONFIG_USER_ONLY)
323 TaskState *ts = env->opaque;
324 /* Allocate the heap using sbrk. */
325 if (!ts->heap_limit) {
326 long ret;
327 uint32_t size;
328 uint32_t base;
330 base = do_brk(0);
331 size = SEMIHOSTING_HEAP_SIZE;
332 /* Try a big heap, and reduce the size if that fails. */
333 for (;;) {
334 ret = do_brk(base + size);
335 if (ret != -1)
336 break;
337 size >>= 1;
339 ts->heap_limit = base + size;
341 /* This call may happen before we have writable memory, so return
342 values directly in registers. */
343 env->dregs[1] = ts->heap_limit;
344 env->aregs[7] = ts->stack_base;
346 #else
347 /* FIXME: This is wrong for boards where RAM does not start at
348 address zero. */
349 env->dregs[1] = ram_size;
350 env->aregs[7] = ram_size;
351 #endif
352 return;
353 default:
354 cpu_abort(env, "Unsupported semihosting syscall %d\n", nr);
355 result = 0;
357 tput32(args, result);
358 tput32(args + 4, errno);