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1.1 root 1: /*
2: * m68k simulator syscall interface
1.1.1.2 ! root 3: *
1.1 root 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 <time.h>
29:
30: #include "qemu.h"
31:
32: #define SYS_EXIT 1
33: #define SYS_READ 3
34: #define SYS_WRITE 4
35: #define SYS_OPEN 5
36: #define SYS_CLOSE 6
37: #define SYS_BRK 17
38: #define SYS_FSTAT 28
39: #define SYS_ISATTY 29
40: #define SYS_LSEEK 199
41:
42: struct m86k_sim_stat {
43: uint16_t sim_st_dev;
44: uint16_t sim_st_ino;
45: uint32_t sim_st_mode;
46: uint16_t sim_st_nlink;
47: uint16_t sim_st_uid;
48: uint16_t sim_st_gid;
49: uint16_t sim_st_rdev;
50: uint32_t sim_st_size;
51: uint32_t sim_st_atime;
52: uint32_t sim_st_mtime;
53: uint32_t sim_st_ctime;
54: uint32_t sim_st_blksize;
55: uint32_t sim_st_blocks;
56: };
57:
58: static inline uint32_t check_err(CPUM68KState *env, uint32_t code)
59: {
60: env->dregs[0] = code;
61: if (code == (uint32_t)-1) {
62: env->dregs[1] = errno;
63: } else {
64: env->dregs[1] = 0;
65: }
66: return code;
67: }
68:
69: #define SIM_O_APPEND 0x0008
70: #define SIM_O_CREAT 0x0200
71: #define SIM_O_TRUNC 0x0400
72: #define SIM_O_EXCL 0x0800
73: #define SIM_O_NONBLOCK 0x4000
74: #define SIM_O_NOCTTY 0x8000
75: #define SIM_O_SYNC 0x2000
76:
77: static int translate_openflags(int flags)
78: {
79: int hf;
80:
81: switch (flags & 3) {
82: case 0: hf = O_RDONLY; break;
83: case 1: hf = O_WRONLY; break;
84: case 2: hf = O_RDWR; break;
85: default: hf = O_RDWR; break;
86: }
87:
88: if (flags & SIM_O_APPEND) hf |= O_APPEND;
89: if (flags & SIM_O_CREAT) hf |= O_CREAT;
90: if (flags & SIM_O_TRUNC) hf |= O_TRUNC;
91: if (flags & SIM_O_EXCL) hf |= O_EXCL;
92: if (flags & SIM_O_NONBLOCK) hf |= O_NONBLOCK;
93: if (flags & SIM_O_NOCTTY) hf |= O_NOCTTY;
94: if (flags & SIM_O_SYNC) hf |= O_SYNC;
95:
96: return hf;
97: }
98:
99: #define ARG(x) tswap32(args[x])
100: void do_m68k_simcall(CPUM68KState *env, int nr)
101: {
102: uint32_t *args;
103:
104: args = (uint32_t *)(env->aregs[7] + 4);
105: switch (nr) {
106: case SYS_EXIT:
107: exit(ARG(0));
108: case SYS_READ:
109: check_err(env, read(ARG(0), (void *)ARG(1), ARG(2)));
110: break;
111: case SYS_WRITE:
112: check_err(env, write(ARG(0), (void *)ARG(1), ARG(2)));
113: break;
114: case SYS_OPEN:
115: check_err(env, open((char *)ARG(0), translate_openflags(ARG(1)),
116: ARG(2)));
117: break;
118: case SYS_CLOSE:
119: {
120: /* Ignore attempts to close stdin/out/err. */
121: int fd = ARG(0);
122: if (fd > 2)
123: check_err(env, close(fd));
124: else
125: check_err(env, 0);
126: break;
127: }
128: case SYS_BRK:
129: {
130: int32_t ret;
131:
1.1.1.2 ! root 132: ret = do_brk((abi_ulong)ARG(0));
1.1 root 133: if (ret == -ENOMEM)
134: ret = -1;
135: check_err(env, ret);
136: }
137: break;
138: case SYS_FSTAT:
139: {
140: struct stat s;
141: int rc;
142: struct m86k_sim_stat *p;
143: rc = check_err(env, fstat(ARG(0), &s));
144: if (rc == 0) {
145: p = (struct m86k_sim_stat *)ARG(1);
146: p->sim_st_dev = tswap16(s.st_dev);
147: p->sim_st_ino = tswap16(s.st_ino);
148: p->sim_st_mode = tswap32(s.st_mode);
149: p->sim_st_nlink = tswap16(s.st_nlink);
150: p->sim_st_uid = tswap16(s.st_uid);
151: p->sim_st_gid = tswap16(s.st_gid);
152: p->sim_st_rdev = tswap16(s.st_rdev);
153: p->sim_st_size = tswap32(s.st_size);
154: p->sim_st_atime = tswap32(s.st_atime);
155: p->sim_st_mtime = tswap32(s.st_mtime);
156: p->sim_st_ctime = tswap32(s.st_ctime);
157: p->sim_st_blksize = tswap32(s.st_blksize);
158: p->sim_st_blocks = tswap32(s.st_blocks);
159: }
160: }
161: break;
162: case SYS_ISATTY:
163: check_err(env, isatty(ARG(0)));
164: break;
165: case SYS_LSEEK:
166: check_err(env, lseek(ARG(0), (int32_t)ARG(1), ARG(2)));
167: break;
168: default:
169: cpu_abort(env, "Unsupported m68k sim syscall %d\n", nr);
170: }
171: }
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