![[BACK]](/cvsweb/icons/back.gif){kind=icon}
Return to m68k-semi.c CVS log ![[TXT]](/cvsweb/icons/text.gif){kind=icon}
![[DIR]](/cvsweb/icons/dir.gif){kind=icon}
Up to [Qemu by Fabrice Bellard] / qemu / linux-user|
Return to m68k-semi.c CVS log | Up to [Qemu by Fabrice Bellard] / qemu / linux-user |
1.1 root 1: /*
2: * m68k/ColdFire Semihosting ssycall interface
3: *
4: * Copyright (c) 2005 CodeSourcery, LLC. Written by Paul Brook.
5: *
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.
10: *
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.
15: *
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.
19: */
20:
21: #include <sys/types.h>
22: #include <sys/stat.h>
23: #include <errno.h>
24: #include <fcntl.h>
25: #include <unistd.h>
26: #include <stdlib.h>
27: #include <stdio.h>
28: #include <sys/time.h>
29: #include <time.h>
30:
31: #include "qemu.h"
32:
33: #define HOSTED_EXIT 0
34: #define HOSTED_PUTCHAR 1 /* Obsolete */
35: #define HOSTED_OPEN 2
36: #define HOSTED_CLOSE 3
37: #define HOSTED_READ 4
38: #define HOSTED_WRITE 5
39: #define HOSTED_LSEEK 6
40: #define HOSTED_RENAME 7
41: #define HOSTED_UNLINK 8
42: #define HOSTED_STAT 9
43: #define HOSTED_FSTAT 10
44: #define HOSTED_GETTIMEOFDAY 11
45: #define HOSTED_ISATTY 12
46: #define HOSTED_SYSTEM 13
47:
48: typedef uint32_t gdb_mode_t;
49: typedef uint32_t gdb_time_t;
50:
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 */
65: };
66:
67: struct gdb_timeval {
68: gdb_time_t tv_sec; /* second */
69: uint64_t tv_usec; /* microsecond */
70: };
71:
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
79:
80: static int translate_openflags(int flags)
81: {
82: int hf;
83:
84: if (flags & GDB_O_WRONLY)
85: hf = O_WRONLY;
86: else if (flags & GDB_O_RDWR)
87: hf = O_RDWR;
88: else
89: hf = O_RDONLY;
90:
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;
95:
96: return hf;
97: }
98:
99: static void translate_stat(struct m68k_gdb_stat *p, struct stat *s)
100: {
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);
114: }
115:
116: static inline uint32_t check_err(CPUM68KState *env, uint32_t code)
117: {
118: if (code == (uint32_t)-1) {
119: env->sr |= CCF_C;
120: } else {
121: env->sr &= ~CCF_C;
122: env->dregs[0] = code;
123: }
124: return code;
125: }
126:
127: #define ARG(x) tswap32(args[x])
128: void do_m68k_semihosting(CPUM68KState *env, int nr)
129: {
130: uint32_t *args;
131:
132: args = (uint32_t *)env->dregs[1];
133: switch (nr) {
134: case HOSTED_EXIT:
135: exit(env->dregs[0]);
136: case HOSTED_OPEN:
137: /* Assume name is NULL terminated. */
138: check_err(env, open((char *)ARG(0), translate_openflags(ARG(2)),
139: ARG(3)));
140: break;
141: case HOSTED_CLOSE:
142: {
143: /* Ignore attempts to close stdin/out/err. */
144: int fd = ARG(0);
145: if (fd > 2)
146: check_err(env, close(fd));
147: else
148: check_err(env, 0);
149: break;
150: }
151: case HOSTED_READ:
152: check_err(env, read(ARG(0), (void *)ARG(1), ARG(2)));
153: break;
154: case HOSTED_WRITE:
155: check_err(env, write(ARG(0), (void *)ARG(1), ARG(2)));
156: break;
157: case HOSTED_LSEEK:
158: {
159: uint64_t off;
160: off = (uint32_t)ARG(2) | ((uint64_t)ARG(1) << 32);
161: check_err(env, lseek(ARG(0), off, ARG(3)));
162: }
163: break;
164: case HOSTED_RENAME:
165: /* Assume names are NULL terminated. */
166: check_err(env, rename((char *)ARG(0), (char *)ARG(2)));
167: break;
168: case HOSTED_UNLINK:
169: /* Assume name is NULL terminated. */
170: check_err(env, unlink((char *)ARG(0)));
171: break;
172: case HOSTED_STAT:
173: /* Assume name is NULL terminated. */
174: {
175: struct stat s;
176: int rc;
177: rc = check_err(env, stat((char *)ARG(0), &s));
178: if (rc == 0) {
179: translate_stat((struct m68k_gdb_stat *)ARG(2), &s);
180: }
181: }
182: break;
183: case HOSTED_FSTAT:
184: {
185: struct stat s;
186: int rc;
187: rc = check_err(env, fstat(ARG(0), &s));
188: if (rc == 0) {
189: translate_stat((struct m68k_gdb_stat *)ARG(1), &s);
190: }
191: }
192: break;
193: case HOSTED_GETTIMEOFDAY:
194: {
195: struct timeval tv;
196: struct gdb_timeval *p;
197: int rc;
198: rc = check_err(env, gettimeofday(&tv, NULL));
199: if (rc != 0) {
200: p = (struct gdb_timeval *)ARG(0);
201: p->tv_sec = tswap32(tv.tv_sec);
202: p->tv_usec = tswap64(tv.tv_usec);
203: }
204: }
205: break;
206: case HOSTED_ISATTY:
207: check_err(env, isatty(ARG(0)));
208: break;
209: case HOSTED_SYSTEM:
210: /* Assume name is NULL terminated. */
211: check_err(env, system((char *)ARG(0)));
212: break;
213: default:
214: cpu_abort(env, "Unsupported semihosting syscall %d\n", nr);
215: }
216: }
This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.