aboutsummaryrefslogtreecommitdiff
path: root/linux-user/m68k-sim.c
blob: 1994e400003567cb81000a7fee04d50fd91e0c10 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
/*
 *  m68k simulator syscall interface
 *
 *  Copyright (c) 2005 CodeSourcery, LLC. Written by Paul Brook.
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, see <http://www.gnu.org/licenses/>.
 */

#include <sys/types.h>
#include <sys/stat.h>
#include <errno.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <time.h>

#include "qemu.h"

#define SYS_EXIT        1
#define SYS_READ        3
#define SYS_WRITE       4
#define SYS_OPEN        5
#define SYS_CLOSE       6
#define SYS_BRK         17
#define SYS_FSTAT       28
#define SYS_ISATTY      29
#define SYS_LSEEK       199

struct m68k_sim_stat {
    uint16_t sim_st_dev;
    uint16_t sim_st_ino;
    uint32_t sim_st_mode;
    uint16_t sim_st_nlink;
    uint16_t sim_st_uid;
    uint16_t sim_st_gid;
    uint16_t sim_st_rdev;
    uint32_t sim_st_size;
    uint32_t sim_st_atime;
    uint32_t sim_st_mtime;
    uint32_t sim_st_ctime;
    uint32_t sim_st_blksize;
    uint32_t sim_st_blocks;
};

static inline uint32_t check_err(CPUM68KState *env, uint32_t code)
{
  env->dregs[0] = code;
  if (code == (uint32_t)-1) {
      env->dregs[1] = errno;
  } else {
      env->dregs[1] = 0;
  }
  return code;
}

#define SIM_O_APPEND    0x0008
#define SIM_O_CREAT     0x0200
#define SIM_O_TRUNC     0x0400
#define SIM_O_EXCL      0x0800
#define SIM_O_NONBLOCK  0x4000
#define SIM_O_NOCTTY    0x8000
#define SIM_O_SYNC      0x2000

static int translate_openflags(int flags)
{
    int hf;

    switch (flags & 3) {
    case 0: hf = O_RDONLY; break;
    case 1: hf = O_WRONLY; break;
    case 2: hf = O_RDWR; break;
    default: hf = O_RDWR; break;
    }

    if (flags & SIM_O_APPEND) hf |= O_APPEND;
    if (flags & SIM_O_CREAT) hf |= O_CREAT;
    if (flags & SIM_O_TRUNC) hf |= O_TRUNC;
    if (flags & SIM_O_EXCL) hf |= O_EXCL;
    if (flags & SIM_O_NONBLOCK) hf |= O_NONBLOCK;
    if (flags & SIM_O_NOCTTY) hf |= O_NOCTTY;
    if (flags & SIM_O_SYNC) hf |= O_SYNC;

    return hf;
}

#define ARG(x) tswap32(args[x])
void do_m68k_simcall(CPUM68KState *env, int nr)
{
    M68kCPU *cpu = m68k_env_get_cpu(env);
    uint32_t *args;

    args = (uint32_t *)(unsigned long)(env->aregs[7] + 4);
    switch (nr) {
    case SYS_EXIT:
        exit(ARG(0));
    case SYS_READ:
        check_err(env, read(ARG(0), (void *)(unsigned long)ARG(1), ARG(2)));
        break;
    case SYS_WRITE:
        check_err(env, write(ARG(0), (void *)(unsigned long)ARG(1), ARG(2)));
        break;
    case SYS_OPEN:
        check_err(env, open((char *)(unsigned long)ARG(0),
                            translate_openflags(ARG(1)), ARG(2)));
        break;
    case SYS_CLOSE:
        {
            /* Ignore attempts to close stdin/out/err.  */
            int fd = ARG(0);
            if (fd > 2)
              check_err(env, close(fd));
            else
              check_err(env, 0);
            break;
        }
    case SYS_BRK:
        {
            int32_t ret;

            ret = do_brk((abi_ulong)ARG(0));
            if (ret == -ENOMEM)
                ret = -1;
            check_err(env, ret);
        }
        break;
    case SYS_FSTAT:
        {
            struct stat s;
            int rc;
            struct m68k_sim_stat *p;
            rc = check_err(env, fstat(ARG(0), &s));
            if (rc == 0) {
                p = (struct m68k_sim_stat *)(unsigned long)ARG(1);
                p->sim_st_dev = tswap16(s.st_dev);
                p->sim_st_ino = tswap16(s.st_ino);
                p->sim_st_mode = tswap32(s.st_mode);
                p->sim_st_nlink = tswap16(s.st_nlink);
                p->sim_st_uid = tswap16(s.st_uid);
                p->sim_st_gid = tswap16(s.st_gid);
                p->sim_st_rdev = tswap16(s.st_rdev);
                p->sim_st_size = tswap32(s.st_size);
                p->sim_st_atime = tswap32(s.st_atime);
                p->sim_st_mtime = tswap32(s.st_mtime);
                p->sim_st_ctime = tswap32(s.st_ctime);
                p->sim_st_blksize = tswap32(s.st_blksize);
                p->sim_st_blocks = tswap32(s.st_blocks);
            }
        }
        break;
    case SYS_ISATTY:
        check_err(env, isatty(ARG(0)));
        break;
    case SYS_LSEEK:
        check_err(env, lseek(ARG(0), (int32_t)ARG(1), ARG(2)));
        break;
    default:
        cpu_abort(CPU(cpu), "Unsupported m68k sim syscall %d\n", nr);
    }
}