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)
36 #include "qemu-common.h"
39 #include "softmmu-semi.h"
43 #define HOSTED_INIT_SIM 1
45 #define HOSTED_CLOSE 3
47 #define HOSTED_WRITE 5
48 #define HOSTED_LSEEK 6
49 #define HOSTED_RENAME 7
50 #define HOSTED_UNLINK 8
52 #define HOSTED_FSTAT 10
53 #define HOSTED_GETTIMEOFDAY 11
54 #define HOSTED_ISATTY 12
55 #define HOSTED_SYSTEM 13
57 typedef uint32_t gdb_mode_t
;
58 typedef uint32_t gdb_time_t
;
60 struct m68k_gdb_stat
{
61 uint32_t gdb_st_dev
; /* device */
62 uint32_t gdb_st_ino
; /* inode */
63 gdb_mode_t gdb_st_mode
; /* protection */
64 uint32_t gdb_st_nlink
; /* number of hard links */
65 uint32_t gdb_st_uid
; /* user ID of owner */
66 uint32_t gdb_st_gid
; /* group ID of owner */
67 uint32_t gdb_st_rdev
; /* device type (if inode device) */
68 uint64_t gdb_st_size
; /* total size, in bytes */
69 uint64_t gdb_st_blksize
; /* blocksize for filesystem I/O */
70 uint64_t gdb_st_blocks
; /* number of blocks allocated */
71 gdb_time_t gdb_st_atime
; /* time of last access */
72 gdb_time_t gdb_st_mtime
; /* time of last modification */
73 gdb_time_t gdb_st_ctime
; /* time of last change */
74 } __attribute__((packed
));
77 gdb_time_t tv_sec
; /* second */
78 uint64_t tv_usec
; /* microsecond */
79 } __attribute__((packed
));
81 #define GDB_O_RDONLY 0x0
82 #define GDB_O_WRONLY 0x1
83 #define GDB_O_RDWR 0x2
84 #define GDB_O_APPEND 0x8
85 #define GDB_O_CREAT 0x200
86 #define GDB_O_TRUNC 0x400
87 #define GDB_O_EXCL 0x800
89 static int translate_openflags(int flags
)
93 if (flags
& GDB_O_WRONLY
)
95 else if (flags
& GDB_O_RDWR
)
100 if (flags
& GDB_O_APPEND
) hf
|= O_APPEND
;
101 if (flags
& GDB_O_CREAT
) hf
|= O_CREAT
;
102 if (flags
& GDB_O_TRUNC
) hf
|= O_TRUNC
;
103 if (flags
& GDB_O_EXCL
) hf
|= O_EXCL
;
108 static void translate_stat(CPUState
*env
, target_ulong addr
, struct stat
*s
)
110 struct m68k_gdb_stat
*p
;
112 if (!(p
= lock_user(VERIFY_WRITE
, addr
, sizeof(struct m68k_gdb_stat
), 0)))
113 /* FIXME - should this return an error code? */
115 p
->gdb_st_dev
= cpu_to_be32(s
->st_dev
);
116 p
->gdb_st_ino
= cpu_to_be32(s
->st_ino
);
117 p
->gdb_st_mode
= cpu_to_be32(s
->st_mode
);
118 p
->gdb_st_nlink
= cpu_to_be32(s
->st_nlink
);
119 p
->gdb_st_uid
= cpu_to_be32(s
->st_uid
);
120 p
->gdb_st_gid
= cpu_to_be32(s
->st_gid
);
121 p
->gdb_st_rdev
= cpu_to_be32(s
->st_rdev
);
122 p
->gdb_st_size
= cpu_to_be64(s
->st_size
);
124 /* Windows stat is missing some fields. */
125 p
->gdb_st_blksize
= 0;
126 p
->gdb_st_blocks
= 0;
128 p
->gdb_st_blksize
= cpu_to_be64(s
->st_blksize
);
129 p
->gdb_st_blocks
= cpu_to_be64(s
->st_blocks
);
131 p
->gdb_st_atime
= cpu_to_be32(s
->st_atime
);
132 p
->gdb_st_mtime
= cpu_to_be32(s
->st_mtime
);
133 p
->gdb_st_ctime
= cpu_to_be32(s
->st_ctime
);
134 unlock_user(p
, addr
, sizeof(struct m68k_gdb_stat
));
137 static int m68k_semi_is_fseek
;
139 static void m68k_semi_cb(CPUState
*env
, target_ulong ret
, target_ulong err
)
143 args
= env
->dregs
[1];
144 if (m68k_semi_is_fseek
) {
145 /* FIXME: We've already lost the high bits of the fseek
147 /* FIXME - handle put_user() failure */
148 put_user_u32(0, args
);
150 m68k_semi_is_fseek
= 0;
152 /* FIXME - handle put_user() failure */
153 put_user_u32(ret
, args
);
154 put_user_u32(errno
, args
+ 4);
159 target_ulong __arg; \
160 /* FIXME - handle get_user() failure */ \
161 get_user_ual(__arg, args + (n) * 4); \
164 #define PARG(x) ((unsigned long)ARG(x))
165 void do_m68k_semihosting(CPUM68KState
*env
, int nr
)
173 args
= env
->dregs
[1];
178 if (use_gdb_syscalls()) {
179 gdb_do_syscall(m68k_semi_cb
, "open,%s,%x,%x", ARG(0), (int)ARG(1),
183 if (!(p
= lock_user_string(ARG(0)))) {
184 /* FIXME - check error code? */
187 result
= open(p
, translate_openflags(ARG(2)), ARG(3));
188 unlock_user(p
, ARG(0), 0);
194 /* Ignore attempts to close stdin/out/err. */
197 if (use_gdb_syscalls()) {
198 gdb_do_syscall(m68k_semi_cb
, "close,%x", ARG(0));
210 if (use_gdb_syscalls()) {
211 gdb_do_syscall(m68k_semi_cb
, "read,%x,%x,%x",
212 ARG(0), ARG(1), len
);
215 if (!(p
= lock_user(VERIFY_WRITE
, ARG(1), len
, 0))) {
216 /* FIXME - check error code? */
219 result
= read(ARG(0), p
, len
);
220 unlock_user(p
, ARG(1), len
);
226 if (use_gdb_syscalls()) {
227 gdb_do_syscall(m68k_semi_cb
, "write,%x,%x,%x",
228 ARG(0), ARG(1), len
);
231 if (!(p
= lock_user(VERIFY_READ
, ARG(1), len
, 1))) {
232 /* FIXME - check error code? */
235 result
= write(ARG(0), p
, len
);
236 unlock_user(p
, ARG(0), 0);
243 off
= (uint32_t)ARG(2) | ((uint64_t)ARG(1) << 32);
244 if (use_gdb_syscalls()) {
245 m68k_semi_is_fseek
= 1;
246 gdb_do_syscall(m68k_semi_cb
, "fseek,%x,%lx,%x",
247 ARG(0), off
, ARG(3));
249 off
= lseek(ARG(0), off
, ARG(3));
250 /* FIXME - handle put_user() failure */
251 put_user_u32(off
>> 32, args
);
252 put_user_u32(off
, args
+ 4);
253 put_user_u32(errno
, args
+ 8);
258 if (use_gdb_syscalls()) {
259 gdb_do_syscall(m68k_semi_cb
, "rename,%s,%s",
260 ARG(0), (int)ARG(1), ARG(2), (int)ARG(3));
263 p
= lock_user_string(ARG(0));
264 q
= lock_user_string(ARG(2));
266 /* FIXME - check error code? */
269 result
= rename(p
, q
);
271 unlock_user(p
, ARG(0), 0);
272 unlock_user(q
, ARG(2), 0);
276 if (use_gdb_syscalls()) {
277 gdb_do_syscall(m68k_semi_cb
, "unlink,%s",
278 ARG(0), (int)ARG(1));
281 if (!(p
= lock_user_string(ARG(0)))) {
282 /* FIXME - check error code? */
286 unlock_user(p
, ARG(0), 0);
291 if (use_gdb_syscalls()) {
292 gdb_do_syscall(m68k_semi_cb
, "stat,%s,%x",
293 ARG(0), (int)ARG(1), ARG(2));
297 if (!(p
= lock_user_string(ARG(0)))) {
298 /* FIXME - check error code? */
301 result
= stat(p
, &s
);
302 unlock_user(p
, ARG(0), 0);
305 translate_stat(env
, ARG(2), &s
);
310 if (use_gdb_syscalls()) {
311 gdb_do_syscall(m68k_semi_cb
, "fstat,%x,%x",
316 result
= fstat(ARG(0), &s
);
318 translate_stat(env
, ARG(1), &s
);
322 case HOSTED_GETTIMEOFDAY
:
323 if (use_gdb_syscalls()) {
324 gdb_do_syscall(m68k_semi_cb
, "gettimeofday,%x,%x",
329 struct gdb_timeval
*p
;
330 result
= qemu_gettimeofday(&tv
);
332 if (!(p
= lock_user(VERIFY_WRITE
,
333 ARG(0), sizeof(struct gdb_timeval
), 0))) {
334 /* FIXME - check error code? */
337 p
->tv_sec
= cpu_to_be32(tv
.tv_sec
);
338 p
->tv_usec
= cpu_to_be64(tv
.tv_usec
);
339 unlock_user(p
, ARG(0), sizeof(struct gdb_timeval
));
345 if (use_gdb_syscalls()) {
346 gdb_do_syscall(m68k_semi_cb
, "isatty,%x", ARG(0));
349 result
= isatty(ARG(0));
353 if (use_gdb_syscalls()) {
354 gdb_do_syscall(m68k_semi_cb
, "system,%s",
355 ARG(0), (int)ARG(1));
358 if (!(p
= lock_user_string(ARG(0)))) {
359 /* FIXME - check error code? */
363 unlock_user(p
, ARG(0), 0);
367 case HOSTED_INIT_SIM
:
368 #if defined(CONFIG_USER_ONLY)
370 TaskState
*ts
= env
->opaque
;
371 /* Allocate the heap using sbrk. */
372 if (!ts
->heap_limit
) {
378 size
= SEMIHOSTING_HEAP_SIZE
;
379 /* Try a big heap, and reduce the size if that fails. */
381 ret
= do_brk(base
+ size
);
386 ts
->heap_limit
= base
+ size
;
388 /* This call may happen before we have writable memory, so return
389 values directly in registers. */
390 env
->dregs
[1] = ts
->heap_limit
;
391 env
->aregs
[7] = ts
->stack_base
;
394 /* FIXME: This is wrong for boards where RAM does not start at
396 env
->dregs
[1] = ram_size
;
397 env
->aregs
[7] = ram_size
;
401 cpu_abort(env
, "Unsupported semihosting syscall %d\n", nr
);
404 /* FIXME - handle put_user() failure */
405 put_user_u32(result
, args
);
406 put_user_u32(errno
, args
+ 4);