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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
1.1.1.4 root 17: * along with this program; if not, see <http://www.gnu.org/licenses/>.
1.1 root 18: */
19:
20: #include <sys/types.h>
21: #include <sys/stat.h>
22: #include <errno.h>
23: #include <fcntl.h>
24: #include <unistd.h>
25: #include <stdlib.h>
26: #include <stdio.h>
27: #include <time.h>
28:
29: #include "qemu.h"
30:
31: #define SYS_EXIT 1
32: #define SYS_READ 3
33: #define SYS_WRITE 4
34: #define SYS_OPEN 5
35: #define SYS_CLOSE 6
36: #define SYS_BRK 17
37: #define SYS_FSTAT 28
38: #define SYS_ISATTY 29
39: #define SYS_LSEEK 199
40:
1.1.1.5 ! root 41: struct m68k_sim_stat {
1.1 root 42: uint16_t sim_st_dev;
43: uint16_t sim_st_ino;
44: uint32_t sim_st_mode;
45: uint16_t sim_st_nlink;
46: uint16_t sim_st_uid;
47: uint16_t sim_st_gid;
48: uint16_t sim_st_rdev;
49: uint32_t sim_st_size;
50: uint32_t sim_st_atime;
51: uint32_t sim_st_mtime;
52: uint32_t sim_st_ctime;
53: uint32_t sim_st_blksize;
54: uint32_t sim_st_blocks;
55: };
56:
57: static inline uint32_t check_err(CPUM68KState *env, uint32_t code)
58: {
59: env->dregs[0] = code;
60: if (code == (uint32_t)-1) {
61: env->dregs[1] = errno;
62: } else {
63: env->dregs[1] = 0;
64: }
65: return code;
66: }
67:
68: #define SIM_O_APPEND 0x0008
69: #define SIM_O_CREAT 0x0200
70: #define SIM_O_TRUNC 0x0400
71: #define SIM_O_EXCL 0x0800
72: #define SIM_O_NONBLOCK 0x4000
73: #define SIM_O_NOCTTY 0x8000
74: #define SIM_O_SYNC 0x2000
75:
76: static int translate_openflags(int flags)
77: {
78: int hf;
79:
80: switch (flags & 3) {
81: case 0: hf = O_RDONLY; break;
82: case 1: hf = O_WRONLY; break;
83: case 2: hf = O_RDWR; break;
84: default: hf = O_RDWR; break;
85: }
86:
87: if (flags & SIM_O_APPEND) hf |= O_APPEND;
88: if (flags & SIM_O_CREAT) hf |= O_CREAT;
89: if (flags & SIM_O_TRUNC) hf |= O_TRUNC;
90: if (flags & SIM_O_EXCL) hf |= O_EXCL;
91: if (flags & SIM_O_NONBLOCK) hf |= O_NONBLOCK;
92: if (flags & SIM_O_NOCTTY) hf |= O_NOCTTY;
93: if (flags & SIM_O_SYNC) hf |= O_SYNC;
94:
95: return hf;
96: }
97:
98: #define ARG(x) tswap32(args[x])
99: void do_m68k_simcall(CPUM68KState *env, int nr)
100: {
101: uint32_t *args;
102:
1.1.1.3 root 103: args = (uint32_t *)(unsigned long)(env->aregs[7] + 4);
1.1 root 104: switch (nr) {
105: case SYS_EXIT:
106: exit(ARG(0));
107: case SYS_READ:
1.1.1.3 root 108: check_err(env, read(ARG(0), (void *)(unsigned long)ARG(1), ARG(2)));
1.1 root 109: break;
110: case SYS_WRITE:
1.1.1.3 root 111: check_err(env, write(ARG(0), (void *)(unsigned long)ARG(1), ARG(2)));
1.1 root 112: break;
113: case SYS_OPEN:
1.1.1.3 root 114: check_err(env, open((char *)(unsigned long)ARG(0),
115: translate_openflags(ARG(1)), ARG(2)));
1.1 root 116: break;
117: case SYS_CLOSE:
118: {
119: /* Ignore attempts to close stdin/out/err. */
120: int fd = ARG(0);
121: if (fd > 2)
122: check_err(env, close(fd));
123: else
124: check_err(env, 0);
125: break;
126: }
127: case SYS_BRK:
128: {
129: int32_t ret;
130:
1.1.1.2 root 131: ret = do_brk((abi_ulong)ARG(0));
1.1 root 132: if (ret == -ENOMEM)
133: ret = -1;
134: check_err(env, ret);
135: }
136: break;
137: case SYS_FSTAT:
138: {
139: struct stat s;
140: int rc;
1.1.1.5 ! root 141: struct m68k_sim_stat *p;
1.1 root 142: rc = check_err(env, fstat(ARG(0), &s));
143: if (rc == 0) {
1.1.1.5 ! root 144: p = (struct m68k_sim_stat *)(unsigned long)ARG(1);
1.1 root 145: p->sim_st_dev = tswap16(s.st_dev);
146: p->sim_st_ino = tswap16(s.st_ino);
147: p->sim_st_mode = tswap32(s.st_mode);
148: p->sim_st_nlink = tswap16(s.st_nlink);
149: p->sim_st_uid = tswap16(s.st_uid);
150: p->sim_st_gid = tswap16(s.st_gid);
151: p->sim_st_rdev = tswap16(s.st_rdev);
152: p->sim_st_size = tswap32(s.st_size);
153: p->sim_st_atime = tswap32(s.st_atime);
154: p->sim_st_mtime = tswap32(s.st_mtime);
155: p->sim_st_ctime = tswap32(s.st_ctime);
156: p->sim_st_blksize = tswap32(s.st_blksize);
157: p->sim_st_blocks = tswap32(s.st_blocks);
158: }
159: }
160: break;
161: case SYS_ISATTY:
162: check_err(env, isatty(ARG(0)));
163: break;
164: case SYS_LSEEK:
165: check_err(env, lseek(ARG(0), (int32_t)ARG(1), ARG(2)));
166: break;
167: default:
168: cpu_abort(env, "Unsupported m68k sim syscall %d\n", nr);
169: }
170: }
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