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);