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);