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 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 p
->gdb_st_blksize
= cpu_to_be64(s
->st_blksize
);
120 p
->gdb_st_blocks
= cpu_to_be64(s
->st_blocks
);
121 p
->gdb_st_atime
= cpu_to_be32(s
->st_atime
);
122 p
->gdb_st_mtime
= cpu_to_be32(s
->st_mtime
);
123 p
->gdb_st_ctime
= cpu_to_be32(s
->st_ctime
);
124 unlock_user(p
, addr
, sizeof(struct m68k_gdb_stat
));
127 static int m68k_semi_is_fseek
;
129 static void m68k_semi_cb(CPUState
*env
, target_ulong ret
, target_ulong err
)
133 args
= env
->dregs
[1];
134 if (m68k_semi_is_fseek
) {
135 /* FIXME: We've already lost the high bits of the fseek
139 m68k_semi_is_fseek
= 0;
142 tput32(args
+ 4, errno
);
145 #define ARG(x) tget32(args + (x) * 4)
146 #define PARG(x) ((unsigned long)ARG(x))
147 void do_m68k_semihosting(CPUM68KState
*env
, int nr
)
155 args
= env
->dregs
[1];
160 if (use_gdb_syscalls()) {
161 gdb_do_syscall(m68k_semi_cb
, "open,%s,%x,%x", ARG(0), (int)ARG(1),
165 p
= lock_user_string(ARG(0));
166 result
= open(p
, translate_openflags(ARG(2)), ARG(3));
167 unlock_user(p
, ARG(0), 0);
172 /* Ignore attempts to close stdin/out/err. */
175 if (use_gdb_syscalls()) {
176 gdb_do_syscall(m68k_semi_cb
, "close,%x", ARG(0));
188 if (use_gdb_syscalls()) {
189 gdb_do_syscall(m68k_semi_cb
, "read,%x,%x,%x",
190 ARG(0), ARG(1), len
);
193 p
= lock_user(ARG(1), len
, 0);
194 result
= read(ARG(0), p
, len
);
195 unlock_user(p
, ARG(1), len
);
200 if (use_gdb_syscalls()) {
201 gdb_do_syscall(m68k_semi_cb
, "write,%x,%x,%x",
202 ARG(0), ARG(1), len
);
205 p
= lock_user(ARG(1), len
, 1);
206 result
= write(ARG(0), p
, len
);
207 unlock_user(p
, ARG(0), 0);
213 off
= (uint32_t)ARG(2) | ((uint64_t)ARG(1) << 32);
214 if (use_gdb_syscalls()) {
215 m68k_semi_is_fseek
= 1;
216 gdb_do_syscall(m68k_semi_cb
, "fseek,%x,%lx,%x",
217 ARG(0), off
, ARG(3));
219 off
= lseek(ARG(0), off
, ARG(3));
220 tput32(args
, off
>> 32);
221 tput32(args
+ 4, off
);
222 tput32(args
+ 8, errno
);
227 if (use_gdb_syscalls()) {
228 gdb_do_syscall(m68k_semi_cb
, "rename,%s,%s",
229 ARG(0), (int)ARG(1), ARG(2), (int)ARG(3));
232 p
= lock_user_string(ARG(0));
233 q
= lock_user_string(ARG(2));
234 result
= rename(p
, q
);
235 unlock_user(p
, ARG(0), 0);
236 unlock_user(q
, ARG(2), 0);
240 if (use_gdb_syscalls()) {
241 gdb_do_syscall(m68k_semi_cb
, "unlink,%s",
242 ARG(0), (int)ARG(1));
245 p
= lock_user_string(ARG(0));
247 unlock_user(p
, ARG(0), 0);
251 if (use_gdb_syscalls()) {
252 gdb_do_syscall(m68k_semi_cb
, "stat,%s,%x",
253 ARG(0), (int)ARG(1), ARG(2));
257 p
= lock_user_string(ARG(0));
258 result
= stat(p
, &s
);
259 unlock_user(p
, ARG(0), 0);
261 translate_stat(env
, ARG(2), &s
);
266 if (use_gdb_syscalls()) {
267 gdb_do_syscall(m68k_semi_cb
, "fstat,%x,%x",
272 result
= fstat(ARG(0), &s
);
274 translate_stat(env
, ARG(1), &s
);
278 case HOSTED_GETTIMEOFDAY
:
279 if (use_gdb_syscalls()) {
280 gdb_do_syscall(m68k_semi_cb
, "gettimeofday,%x,%x",
285 struct gdb_timeval
*p
;
286 result
= gettimeofday(&tv
, NULL
);
288 p
= lock_user(ARG(0), sizeof(struct gdb_timeval
), 0);
289 p
->tv_sec
= cpu_to_be32(tv
.tv_sec
);
290 p
->tv_usec
= cpu_to_be64(tv
.tv_usec
);
291 unlock_user(p
, ARG(0), sizeof(struct gdb_timeval
));
296 if (use_gdb_syscalls()) {
297 gdb_do_syscall(m68k_semi_cb
, "isatty,%x", ARG(0));
300 result
= isatty(ARG(0));
304 if (use_gdb_syscalls()) {
305 gdb_do_syscall(m68k_semi_cb
, "system,%s",
306 ARG(0), (int)ARG(1));
309 p
= lock_user_string(ARG(0));
311 unlock_user(p
, ARG(0), 0);
314 case HOSTED_INIT_SIM
:
315 #if defined(CONFIG_USER_ONLY)
317 TaskState
*ts
= env
->opaque
;
318 /* Allocate the heap using sbrk. */
319 if (!ts
->heap_limit
) {
325 size
= SEMIHOSTING_HEAP_SIZE
;
326 /* Try a big heap, and reduce the size if that fails. */
328 ret
= do_brk(base
+ size
);
333 ts
->heap_limit
= base
+ size
;
335 /* This call may happen before we have writable memory, so return
336 values directly in registers. */
337 env
->dregs
[1] = ts
->heap_limit
;
338 env
->aregs
[7] = ts
->stack_base
;
341 /* FIXME: This is wrong for boards where RAM does not start at
343 env
->dregs
[1] = ram_size
;
344 env
->aregs
[7] = ram_size
;
348 cpu_abort(env
, "Unsupported semihosting syscall %d\n", nr
);
351 tput32(args
, result
);
352 tput32(args
+ 4, errno
);