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>
32 #if defined(CONFIG_USER_ONLY)
34 #define SEMIHOSTING_HEAP_SIZE (128 * 1024 * 1024)
37 #include "softmmu-semi.h"
41 #define HOSTED_INIT_SIM 1
43 #define HOSTED_CLOSE 3
45 #define HOSTED_WRITE 5
46 #define HOSTED_LSEEK 6
47 #define HOSTED_RENAME 7
48 #define HOSTED_UNLINK 8
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));
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)
91 if (flags & GDB_O_WRONLY)
93 else if (flags & GDB_O_RDWR)
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;
106 static void translate_stat(CPUState *env, target_ulong addr, struct stat *s)
108 struct m68k_gdb_stat *p;
110 if (!(p = lock_user(VERIFY_WRITE, addr, sizeof(struct m68k_gdb_stat), 0)))
111 /* FIXME - should this return an error code? */
113 p->gdb_st_dev = cpu_to_be32(s->st_dev);
114 p->gdb_st_ino = cpu_to_be32(s->st_ino);
115 p->gdb_st_mode = cpu_to_be32(s->st_mode);
116 p->gdb_st_nlink = cpu_to_be32(s->st_nlink);
117 p->gdb_st_uid = cpu_to_be32(s->st_uid);
118 p->gdb_st_gid = cpu_to_be32(s->st_gid);
119 p->gdb_st_rdev = cpu_to_be32(s->st_rdev);
120 p->gdb_st_size = cpu_to_be64(s->st_size);
122 /* Windows stat is missing some fields. */
123 p->gdb_st_blksize = 0;
124 p->gdb_st_blocks = 0;
126 p->gdb_st_blksize = cpu_to_be64(s->st_blksize);
127 p->gdb_st_blocks = cpu_to_be64(s->st_blocks);
129 p->gdb_st_atime = cpu_to_be32(s->st_atime);
130 p->gdb_st_mtime = cpu_to_be32(s->st_mtime);
131 p->gdb_st_ctime = cpu_to_be32(s->st_ctime);
132 unlock_user(p, addr, sizeof(struct m68k_gdb_stat));
135 static int m68k_semi_is_fseek;
137 static void m68k_semi_cb(CPUState *env, target_ulong ret, target_ulong err)
141 args = env->dregs[1];
142 if (m68k_semi_is_fseek) {
143 /* FIXME: We've already lost the high bits of the fseek
145 /* FIXME - handle put_user() failure */
146 put_user_u32(0, args);
148 m68k_semi_is_fseek = 0;
150 /* FIXME - handle put_user() failure */
151 put_user_u32(ret, args);
152 put_user_u32(errno, args + 4);
157 target_ulong __arg; \
158 /* FIXME - handle get_user() failure */ \
159 get_user_ual(__arg, args + (n) * 4); \
162 #define PARG(x) ((unsigned long)ARG(x))
163 void do_m68k_semihosting(CPUM68KState *env, int nr)
171 args = env->dregs[1];
176 if (use_gdb_syscalls()) {
177 gdb_do_syscall(m68k_semi_cb, "open,%s,%x,%x", ARG(0), (int)ARG(1),
181 if (!(p = lock_user_string(ARG(0)))) {
182 /* FIXME - check error code? */
185 result = open(p, translate_openflags(ARG(2)), ARG(3));
186 unlock_user(p, ARG(0), 0);
192 /* Ignore attempts to close stdin/out/err. */
195 if (use_gdb_syscalls()) {
196 gdb_do_syscall(m68k_semi_cb, "close,%x", ARG(0));
208 if (use_gdb_syscalls()) {
209 gdb_do_syscall(m68k_semi_cb, "read,%x,%x,%x",
210 ARG(0), ARG(1), len);
213 if (!(p = lock_user(VERIFY_WRITE, ARG(1), len, 0))) {
214 /* FIXME - check error code? */
217 result = read(ARG(0), p, len);
218 unlock_user(p, ARG(1), len);
224 if (use_gdb_syscalls()) {
225 gdb_do_syscall(m68k_semi_cb, "write,%x,%x,%x",
226 ARG(0), ARG(1), len);
229 if (!(p = lock_user(VERIFY_READ, ARG(1), len, 1))) {
230 /* FIXME - check error code? */
233 result = write(ARG(0), p, len);
234 unlock_user(p, ARG(0), 0);
241 off = (uint32_t)ARG(2) | ((uint64_t)ARG(1) << 32);
242 if (use_gdb_syscalls()) {
243 m68k_semi_is_fseek = 1;
244 gdb_do_syscall(m68k_semi_cb, "fseek,%x,%lx,%x",
245 ARG(0), off, ARG(3));
247 off = lseek(ARG(0), off, ARG(3));
248 /* FIXME - handle put_user() failure */
249 put_user_u32(off >> 32, args);
250 put_user_u32(off, args + 4);
251 put_user_u32(errno, args + 8);
256 if (use_gdb_syscalls()) {
257 gdb_do_syscall(m68k_semi_cb, "rename,%s,%s",
258 ARG(0), (int)ARG(1), ARG(2), (int)ARG(3));
261 p = lock_user_string(ARG(0));
262 q = lock_user_string(ARG(2));
264 /* FIXME - check error code? */
267 result = rename(p, q);
269 unlock_user(p, ARG(0), 0);
270 unlock_user(q, ARG(2), 0);
274 if (use_gdb_syscalls()) {
275 gdb_do_syscall(m68k_semi_cb, "unlink,%s",
276 ARG(0), (int)ARG(1));
279 if (!(p = lock_user_string(ARG(0)))) {
280 /* FIXME - check error code? */
284 unlock_user(p, ARG(0), 0);
289 if (use_gdb_syscalls()) {
290 gdb_do_syscall(m68k_semi_cb, "stat,%s,%x",
291 ARG(0), (int)ARG(1), ARG(2));
295 if (!(p = lock_user_string(ARG(0)))) {
296 /* FIXME - check error code? */
299 result = stat(p, &s);
300 unlock_user(p, ARG(0), 0);
303 translate_stat(env, ARG(2), &s);
308 if (use_gdb_syscalls()) {
309 gdb_do_syscall(m68k_semi_cb, "fstat,%x,%x",
314 result = fstat(ARG(0), &s);
316 translate_stat(env, ARG(1), &s);
320 case HOSTED_GETTIMEOFDAY:
321 if (use_gdb_syscalls()) {
322 gdb_do_syscall(m68k_semi_cb, "gettimeofday,%x,%x",
327 struct gdb_timeval *p;
328 result = qemu_gettimeofday(&tv);
330 if (!(p = lock_user(VERIFY_WRITE,
331 ARG(0), sizeof(struct gdb_timeval), 0))) {
332 /* FIXME - check error code? */
335 p->tv_sec = cpu_to_be32(tv.tv_sec);
336 p->tv_usec = cpu_to_be64(tv.tv_usec);
337 unlock_user(p, ARG(0), sizeof(struct gdb_timeval));
343 if (use_gdb_syscalls()) {
344 gdb_do_syscall(m68k_semi_cb, "isatty,%x", ARG(0));
347 result = isatty(ARG(0));
351 if (use_gdb_syscalls()) {
352 gdb_do_syscall(m68k_semi_cb, "system,%s",
353 ARG(0), (int)ARG(1));
356 if (!(p = lock_user_string(ARG(0)))) {
357 /* FIXME - check error code? */
361 unlock_user(p, ARG(0), 0);
365 case HOSTED_INIT_SIM:
366 #if defined(CONFIG_USER_ONLY)
368 TaskState *ts = env->opaque;
369 /* Allocate the heap using sbrk. */
370 if (!ts->heap_limit) {
376 size = SEMIHOSTING_HEAP_SIZE;
377 /* Try a big heap, and reduce the size if that fails. */
379 ret = do_brk(base + size);
384 ts->heap_limit = base + size;
386 /* This call may happen before we have writable memory, so return
387 values directly in registers. */
388 env->dregs[1] = ts->heap_limit;
389 env->aregs[7] = ts->stack_base;
392 /* FIXME: This is wrong for boards where RAM does not start at
394 env->dregs[1] = ram_size;
395 env->aregs[7] = ram_size;
399 cpu_abort(env, "Unsupported semihosting syscall %d\n", nr);
402 /* FIXME - handle put_user() failure */
403 put_user_u32(result, args);
404 put_user_u32(errno, args + 4);