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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
1.1.1.3 ! root 18: * Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
! 19: * MA 02110-1301, USA.
1.1 root 20: */
21:
22: #include <sys/types.h>
23: #include <sys/stat.h>
24: #include <errno.h>
25: #include <fcntl.h>
26: #include <unistd.h>
27: #include <stdlib.h>
28: #include <stdio.h>
29: #include <time.h>
30:
31: #include "qemu.h"
32:
33: #define SYS_EXIT 1
34: #define SYS_READ 3
35: #define SYS_WRITE 4
36: #define SYS_OPEN 5
37: #define SYS_CLOSE 6
38: #define SYS_BRK 17
39: #define SYS_FSTAT 28
40: #define SYS_ISATTY 29
41: #define SYS_LSEEK 199
42:
43: struct m86k_sim_stat {
44: uint16_t sim_st_dev;
45: uint16_t sim_st_ino;
46: uint32_t sim_st_mode;
47: uint16_t sim_st_nlink;
48: uint16_t sim_st_uid;
49: uint16_t sim_st_gid;
50: uint16_t sim_st_rdev;
51: uint32_t sim_st_size;
52: uint32_t sim_st_atime;
53: uint32_t sim_st_mtime;
54: uint32_t sim_st_ctime;
55: uint32_t sim_st_blksize;
56: uint32_t sim_st_blocks;
57: };
58:
59: static inline uint32_t check_err(CPUM68KState *env, uint32_t code)
60: {
61: env->dregs[0] = code;
62: if (code == (uint32_t)-1) {
63: env->dregs[1] = errno;
64: } else {
65: env->dregs[1] = 0;
66: }
67: return code;
68: }
69:
70: #define SIM_O_APPEND 0x0008
71: #define SIM_O_CREAT 0x0200
72: #define SIM_O_TRUNC 0x0400
73: #define SIM_O_EXCL 0x0800
74: #define SIM_O_NONBLOCK 0x4000
75: #define SIM_O_NOCTTY 0x8000
76: #define SIM_O_SYNC 0x2000
77:
78: static int translate_openflags(int flags)
79: {
80: int hf;
81:
82: switch (flags & 3) {
83: case 0: hf = O_RDONLY; break;
84: case 1: hf = O_WRONLY; break;
85: case 2: hf = O_RDWR; break;
86: default: hf = O_RDWR; break;
87: }
88:
89: if (flags & SIM_O_APPEND) hf |= O_APPEND;
90: if (flags & SIM_O_CREAT) hf |= O_CREAT;
91: if (flags & SIM_O_TRUNC) hf |= O_TRUNC;
92: if (flags & SIM_O_EXCL) hf |= O_EXCL;
93: if (flags & SIM_O_NONBLOCK) hf |= O_NONBLOCK;
94: if (flags & SIM_O_NOCTTY) hf |= O_NOCTTY;
95: if (flags & SIM_O_SYNC) hf |= O_SYNC;
96:
97: return hf;
98: }
99:
100: #define ARG(x) tswap32(args[x])
101: void do_m68k_simcall(CPUM68KState *env, int nr)
102: {
103: uint32_t *args;
104:
1.1.1.3 ! root 105: args = (uint32_t *)(unsigned long)(env->aregs[7] + 4);
1.1 root 106: switch (nr) {
107: case SYS_EXIT:
108: exit(ARG(0));
109: case SYS_READ:
1.1.1.3 ! root 110: check_err(env, read(ARG(0), (void *)(unsigned long)ARG(1), ARG(2)));
1.1 root 111: break;
112: case SYS_WRITE:
1.1.1.3 ! root 113: check_err(env, write(ARG(0), (void *)(unsigned long)ARG(1), ARG(2)));
1.1 root 114: break;
115: case SYS_OPEN:
1.1.1.3 ! root 116: check_err(env, open((char *)(unsigned long)ARG(0),
! 117: translate_openflags(ARG(1)), ARG(2)));
1.1 root 118: break;
119: case SYS_CLOSE:
120: {
121: /* Ignore attempts to close stdin/out/err. */
122: int fd = ARG(0);
123: if (fd > 2)
124: check_err(env, close(fd));
125: else
126: check_err(env, 0);
127: break;
128: }
129: case SYS_BRK:
130: {
131: int32_t ret;
132:
1.1.1.2 root 133: ret = do_brk((abi_ulong)ARG(0));
1.1 root 134: if (ret == -ENOMEM)
135: ret = -1;
136: check_err(env, ret);
137: }
138: break;
139: case SYS_FSTAT:
140: {
141: struct stat s;
142: int rc;
143: struct m86k_sim_stat *p;
144: rc = check_err(env, fstat(ARG(0), &s));
145: if (rc == 0) {
1.1.1.3 ! root 146: p = (struct m86k_sim_stat *)(unsigned long)ARG(1);
1.1 root 147: p->sim_st_dev = tswap16(s.st_dev);
148: p->sim_st_ino = tswap16(s.st_ino);
149: p->sim_st_mode = tswap32(s.st_mode);
150: p->sim_st_nlink = tswap16(s.st_nlink);
151: p->sim_st_uid = tswap16(s.st_uid);
152: p->sim_st_gid = tswap16(s.st_gid);
153: p->sim_st_rdev = tswap16(s.st_rdev);
154: p->sim_st_size = tswap32(s.st_size);
155: p->sim_st_atime = tswap32(s.st_atime);
156: p->sim_st_mtime = tswap32(s.st_mtime);
157: p->sim_st_ctime = tswap32(s.st_ctime);
158: p->sim_st_blksize = tswap32(s.st_blksize);
159: p->sim_st_blocks = tswap32(s.st_blocks);
160: }
161: }
162: break;
163: case SYS_ISATTY:
164: check_err(env, isatty(ARG(0)));
165: break;
166: case SYS_LSEEK:
167: check_err(env, lseek(ARG(0), (int32_t)ARG(1), ARG(2)));
168: break;
169: default:
170: cpu_abort(env, "Unsupported m68k sim syscall %d\n", nr);
171: }
172: }
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