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, see <http://www.gnu.org/licenses/>.
20 #include <sys/types.h>
31 #if defined(CONFIG_USER_ONLY)
33 #define SEMIHOSTING_HEAP_SIZE (128 * 1024 * 1024)
35 #include "qemu-common.h"
38 #include "softmmu-semi.h"
42 #define HOSTED_INIT_SIM 1
44 #define HOSTED_CLOSE 3
46 #define HOSTED_WRITE 5
47 #define HOSTED_LSEEK 6
48 #define HOSTED_RENAME 7
49 #define HOSTED_UNLINK 8
51 #define HOSTED_FSTAT 10
52 #define HOSTED_GETTIMEOFDAY 11
53 #define HOSTED_ISATTY 12
54 #define HOSTED_SYSTEM 13
56 typedef uint32_t gdb_mode_t;
57 typedef uint32_t gdb_time_t;
59 struct m68k_gdb_stat {
60 uint32_t gdb_st_dev; /* device */
61 uint32_t gdb_st_ino; /* inode */
62 gdb_mode_t gdb_st_mode; /* protection */
63 uint32_t gdb_st_nlink; /* number of hard links */
64 uint32_t gdb_st_uid; /* user ID of owner */
65 uint32_t gdb_st_gid; /* group ID of owner */
66 uint32_t gdb_st_rdev; /* device type (if inode device) */
67 uint64_t gdb_st_size; /* total size, in bytes */
68 uint64_t gdb_st_blksize; /* blocksize for filesystem I/O */
69 uint64_t gdb_st_blocks; /* number of blocks allocated */
70 gdb_time_t gdb_st_atime; /* time of last access */
71 gdb_time_t gdb_st_mtime; /* time of last modification */
72 gdb_time_t gdb_st_ctime; /* time of last change */
73 } __attribute__((packed));
76 gdb_time_t tv_sec; /* second */
77 uint64_t tv_usec; /* microsecond */
78 } __attribute__((packed));
80 #define GDB_O_RDONLY 0x0
81 #define GDB_O_WRONLY 0x1
82 #define GDB_O_RDWR 0x2
83 #define GDB_O_APPEND 0x8
84 #define GDB_O_CREAT 0x200
85 #define GDB_O_TRUNC 0x400
86 #define GDB_O_EXCL 0x800
88 static int translate_openflags(int flags)
92 if (flags & GDB_O_WRONLY)
94 else if (flags & GDB_O_RDWR)
99 if (flags & GDB_O_APPEND) hf |= O_APPEND;
100 if (flags & GDB_O_CREAT) hf |= O_CREAT;
101 if (flags & GDB_O_TRUNC) hf |= O_TRUNC;
102 if (flags & GDB_O_EXCL) hf |= O_EXCL;
107 static void translate_stat(CPUState *env, target_ulong addr, struct stat *s)
109 struct m68k_gdb_stat *p;
111 if (!(p = lock_user(VERIFY_WRITE, addr, sizeof(struct m68k_gdb_stat), 0)))
112 /* FIXME - should this return an error code? */
114 p->gdb_st_dev = cpu_to_be32(s->st_dev);
115 p->gdb_st_ino = cpu_to_be32(s->st_ino);
116 p->gdb_st_mode = cpu_to_be32(s->st_mode);
117 p->gdb_st_nlink = cpu_to_be32(s->st_nlink);
118 p->gdb_st_uid = cpu_to_be32(s->st_uid);
119 p->gdb_st_gid = cpu_to_be32(s->st_gid);
120 p->gdb_st_rdev = cpu_to_be32(s->st_rdev);
121 p->gdb_st_size = cpu_to_be64(s->st_size);
123 /* Windows stat is missing some fields. */
124 p->gdb_st_blksize = 0;
125 p->gdb_st_blocks = 0;
127 p->gdb_st_blksize = cpu_to_be64(s->st_blksize);
128 p->gdb_st_blocks = cpu_to_be64(s->st_blocks);
130 p->gdb_st_atime = cpu_to_be32(s->st_atime);
131 p->gdb_st_mtime = cpu_to_be32(s->st_mtime);
132 p->gdb_st_ctime = cpu_to_be32(s->st_ctime);
133 unlock_user(p, addr, sizeof(struct m68k_gdb_stat));
136 static int m68k_semi_is_fseek;
138 static void m68k_semi_cb(CPUState *env, target_ulong ret, target_ulong err)
142 args = env->dregs[1];
143 if (m68k_semi_is_fseek) {
144 /* FIXME: We've already lost the high bits of the fseek
146 /* FIXME - handle put_user() failure */
147 put_user_u32(0, args);
149 m68k_semi_is_fseek = 0;
151 /* FIXME - handle put_user() failure */
152 put_user_u32(ret, args);
153 put_user_u32(errno, args + 4);
158 target_ulong __arg; \
159 /* FIXME - handle get_user() failure */ \
160 get_user_ual(__arg, args + (n) * 4); \
163 #define PARG(x) ((unsigned long)ARG(x))
164 void do_m68k_semihosting(CPUM68KState *env, int nr)
172 args = env->dregs[1];
177 if (use_gdb_syscalls()) {
178 gdb_do_syscall(m68k_semi_cb, "open,%s,%x,%x", ARG(0), (int)ARG(1),
182 if (!(p = lock_user_string(ARG(0)))) {
183 /* FIXME - check error code? */
186 result = open(p, translate_openflags(ARG(2)), ARG(3));
187 unlock_user(p, ARG(0), 0);
193 /* Ignore attempts to close stdin/out/err. */
196 if (use_gdb_syscalls()) {
197 gdb_do_syscall(m68k_semi_cb, "close,%x", ARG(0));
209 if (use_gdb_syscalls()) {
210 gdb_do_syscall(m68k_semi_cb, "read,%x,%x,%x",
211 ARG(0), ARG(1), len);
214 if (!(p = lock_user(VERIFY_WRITE, ARG(1), len, 0))) {
215 /* FIXME - check error code? */
218 result = read(ARG(0), p, len);
219 unlock_user(p, ARG(1), len);
225 if (use_gdb_syscalls()) {
226 gdb_do_syscall(m68k_semi_cb, "write,%x,%x,%x",
227 ARG(0), ARG(1), len);
230 if (!(p = lock_user(VERIFY_READ, ARG(1), len, 1))) {
231 /* FIXME - check error code? */
234 result = write(ARG(0), p, len);
235 unlock_user(p, ARG(0), 0);
242 off = (uint32_t)ARG(2) | ((uint64_t)ARG(1) << 32);
243 if (use_gdb_syscalls()) {
244 m68k_semi_is_fseek = 1;
245 gdb_do_syscall(m68k_semi_cb, "fseek,%x,%lx,%x",
246 ARG(0), off, ARG(3));
248 off = lseek(ARG(0), off, ARG(3));
249 /* FIXME - handle put_user() failure */
250 put_user_u32(off >> 32, args);
251 put_user_u32(off, args + 4);
252 put_user_u32(errno, args + 8);
257 if (use_gdb_syscalls()) {
258 gdb_do_syscall(m68k_semi_cb, "rename,%s,%s",
259 ARG(0), (int)ARG(1), ARG(2), (int)ARG(3));
262 p = lock_user_string(ARG(0));
263 q = lock_user_string(ARG(2));
265 /* FIXME - check error code? */
268 result = rename(p, q);
270 unlock_user(p, ARG(0), 0);
271 unlock_user(q, ARG(2), 0);
275 if (use_gdb_syscalls()) {
276 gdb_do_syscall(m68k_semi_cb, "unlink,%s",
277 ARG(0), (int)ARG(1));
280 if (!(p = lock_user_string(ARG(0)))) {
281 /* FIXME - check error code? */
285 unlock_user(p, ARG(0), 0);
290 if (use_gdb_syscalls()) {
291 gdb_do_syscall(m68k_semi_cb, "stat,%s,%x",
292 ARG(0), (int)ARG(1), ARG(2));
296 if (!(p = lock_user_string(ARG(0)))) {
297 /* FIXME - check error code? */
300 result = stat(p, &s);
301 unlock_user(p, ARG(0), 0);
304 translate_stat(env, ARG(2), &s);
309 if (use_gdb_syscalls()) {
310 gdb_do_syscall(m68k_semi_cb, "fstat,%x,%x",
315 result = fstat(ARG(0), &s);
317 translate_stat(env, ARG(1), &s);
321 case HOSTED_GETTIMEOFDAY:
322 if (use_gdb_syscalls()) {
323 gdb_do_syscall(m68k_semi_cb, "gettimeofday,%x,%x",
328 struct gdb_timeval *p;
329 result = qemu_gettimeofday(&tv);
331 if (!(p = lock_user(VERIFY_WRITE,
332 ARG(0), sizeof(struct gdb_timeval), 0))) {
333 /* FIXME - check error code? */
336 p->tv_sec = cpu_to_be32(tv.tv_sec);
337 p->tv_usec = cpu_to_be64(tv.tv_usec);
338 unlock_user(p, ARG(0), sizeof(struct gdb_timeval));
344 if (use_gdb_syscalls()) {
345 gdb_do_syscall(m68k_semi_cb, "isatty,%x", ARG(0));
348 result = isatty(ARG(0));
352 if (use_gdb_syscalls()) {
353 gdb_do_syscall(m68k_semi_cb, "system,%s",
354 ARG(0), (int)ARG(1));
357 if (!(p = lock_user_string(ARG(0)))) {
358 /* FIXME - check error code? */
362 unlock_user(p, ARG(0), 0);
366 case HOSTED_INIT_SIM:
367 #if defined(CONFIG_USER_ONLY)
369 TaskState *ts = env->opaque;
370 /* Allocate the heap using sbrk. */
371 if (!ts->heap_limit) {
377 size = SEMIHOSTING_HEAP_SIZE;
378 /* Try a big heap, and reduce the size if that fails. */
380 ret = do_brk(base + size);
385 ts->heap_limit = base + size;
387 /* This call may happen before we have writable memory, so return
388 values directly in registers. */
389 env->dregs[1] = ts->heap_limit;
390 env->aregs[7] = ts->stack_base;
393 /* FIXME: This is wrong for boards where RAM does not start at
395 env->dregs[1] = ram_size;
396 env->aregs[7] = ram_size;
400 cpu_abort(env, "Unsupported semihosting syscall %d\n", nr);
403 /* FIXME - handle put_user() failure */
404 put_user_u32(result, args);
405 put_user_u32(errno, args + 4);