2 * m68k/ColdFire Semihosting ssycall interface
4 * Copyright (c) 2005 CodeSourcery, LLC. Written by Paul Brook.
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>
34 #define HOSTED_PUTCHAR 1 /* Obsolete */
36 #define HOSTED_CLOSE 3
38 #define HOSTED_WRITE 5
39 #define HOSTED_LSEEK 6
40 #define HOSTED_RENAME 7
41 #define HOSTED_UNLINK 8
43 #define HOSTED_FSTAT 10
44 #define HOSTED_GETTIMEOFDAY 11
45 #define HOSTED_ISATTY 12
46 #define HOSTED_SYSTEM 13
48 typedef uint32_t gdb_mode_t;
49 typedef uint32_t gdb_time_t;
51 struct m68k_gdb_stat {
52 uint32_t gdb_st_dev; /* device */
53 uint32_t gdb_st_ino; /* inode */
54 gdb_mode_t gdb_st_mode; /* protection */
55 uint32_t gdb_st_nlink; /* number of hard links */
56 uint32_t gdb_st_uid; /* user ID of owner */
57 uint32_t gdb_st_gid; /* group ID of owner */
58 uint32_t gdb_st_rdev; /* device type (if inode device) */
59 uint64_t gdb_st_size; /* total size, in bytes */
60 uint64_t gdb_st_blksize; /* blocksize for filesystem I/O */
61 uint64_t gdb_st_blocks; /* number of blocks allocated */
62 gdb_time_t gdb_st_atime; /* time of last access */
63 gdb_time_t gdb_st_mtime; /* time of last modification */
64 gdb_time_t gdb_st_ctime; /* time of last change */
68 gdb_time_t tv_sec; /* second */
69 uint64_t tv_usec; /* microsecond */
72 #define GDB_O_RDONLY 0x0
73 #define GDB_O_WRONLY 0x1
74 #define GDB_O_RDWR 0x2
75 #define GDB_O_APPEND 0x8
76 #define GDB_O_CREAT 0x200
77 #define GDB_O_TRUNC 0x400
78 #define GDB_O_EXCL 0x800
80 static int translate_openflags(int flags)
84 if (flags & GDB_O_WRONLY)
86 else if (flags & GDB_O_RDWR)
91 if (flags & GDB_O_APPEND) hf |= O_APPEND;
92 if (flags & GDB_O_CREAT) hf |= O_CREAT;
93 if (flags & GDB_O_TRUNC) hf |= O_TRUNC;
94 if (flags & GDB_O_EXCL) hf |= O_EXCL;
99 static void translate_stat(struct m68k_gdb_stat *p, struct stat *s)
101 p->gdb_st_dev = tswap16(s->st_dev);
102 p->gdb_st_ino = tswap16(s->st_ino);
103 p->gdb_st_mode = tswap32(s->st_mode);
104 p->gdb_st_nlink = tswap16(s->st_nlink);
105 p->gdb_st_uid = tswap16(s->st_uid);
106 p->gdb_st_gid = tswap16(s->st_gid);
107 p->gdb_st_rdev = tswap16(s->st_rdev);
108 p->gdb_st_size = tswap32(s->st_size);
109 p->gdb_st_atime = tswap32(s->st_atime);
110 p->gdb_st_mtime = tswap32(s->st_mtime);
111 p->gdb_st_ctime = tswap32(s->st_ctime);
112 p->gdb_st_blksize = tswap32(s->st_blksize);
113 p->gdb_st_blocks = tswap32(s->st_blocks);
116 static inline uint32_t check_err(CPUM68KState *env, uint32_t code)
118 if (code == (uint32_t)-1) {
122 env->dregs[0] = code;
127 #define ARG(x) tswap32(args[x])
128 void do_m68k_semihosting(CPUM68KState *env, int nr)
132 args = (uint32_t *)env->dregs[1];
137 /* Assume name is NULL terminated. */
138 check_err(env, open((char *)ARG(0), translate_openflags(ARG(2)),
143 /* Ignore attempts to close stdin/out/err. */
146 check_err(env, close(fd));
152 check_err(env, read(ARG(0), (void *)ARG(1), ARG(2)));
155 check_err(env, write(ARG(0), (void *)ARG(1), ARG(2)));
160 off = (uint32_t)ARG(2) | ((uint64_t)ARG(1) << 32);
161 check_err(env, lseek(ARG(0), off, ARG(3)));
165 /* Assume names are NULL terminated. */
166 check_err(env, rename((char *)ARG(0), (char *)ARG(2)));
169 /* Assume name is NULL terminated. */
170 check_err(env, unlink((char *)ARG(0)));
173 /* Assume name is NULL terminated. */
177 rc = check_err(env, stat((char *)ARG(0), &s));
179 translate_stat((struct m68k_gdb_stat *)ARG(2), &s);
187 rc = check_err(env, fstat(ARG(0), &s));
189 translate_stat((struct m68k_gdb_stat *)ARG(1), &s);
193 case HOSTED_GETTIMEOFDAY:
196 struct gdb_timeval *p;
198 rc = check_err(env, gettimeofday(&tv, NULL));
200 p = (struct gdb_timeval *)ARG(0);
201 p->tv_sec = tswap32(tv.tv_sec);
202 p->tv_usec = tswap64(tv.tv_usec);
207 check_err(env, isatty(ARG(0)));
210 /* Assume name is NULL terminated. */
211 check_err(env, system((char *)ARG(0)));
214 cpu_abort(env, "Unsupported semihosting syscall %d\n", nr);