summaryrefslogtreecommitdiffstats
path: root/linux-user/m68k-semi.c
blob: 7f6dddaee48aeb0c93cdc66e4e016de62a71aca0 (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
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
/*
 *  m68k/ColdFire Semihosting ssycall 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, write to the Free Software
 *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

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

#include "qemu.h"

#define HOSTED_EXIT  0
#define HOSTED_PUTCHAR 1 /* Obsolete */
#define HOSTED_OPEN 2
#define HOSTED_CLOSE 3
#define HOSTED_READ 4
#define HOSTED_WRITE 5
#define HOSTED_LSEEK 6
#define HOSTED_RENAME 7
#define HOSTED_UNLINK 8
#define HOSTED_STAT 9
#define HOSTED_FSTAT 10
#define HOSTED_GETTIMEOFDAY 11
#define HOSTED_ISATTY 12
#define HOSTED_SYSTEM 13

typedef uint32_t gdb_mode_t;
typedef uint32_t gdb_time_t;

struct m68k_gdb_stat {
  uint32_t    gdb_st_dev;     /* device */
  uint32_t    gdb_st_ino;     /* inode */
  gdb_mode_t  gdb_st_mode;    /* protection */
  uint32_t    gdb_st_nlink;   /* number of hard links */
  uint32_t    gdb_st_uid;     /* user ID of owner */
  uint32_t    gdb_st_gid;     /* group ID of owner */
  uint32_t    gdb_st_rdev;    /* device type (if inode device) */
  uint64_t    gdb_st_size;    /* total size, in bytes */
  uint64_t    gdb_st_blksize; /* blocksize for filesystem I/O */
  uint64_t    gdb_st_blocks;  /* number of blocks allocated */
  gdb_time_t  gdb_st_atime;   /* time of last access */
  gdb_time_t  gdb_st_mtime;   /* time of last modification */
  gdb_time_t  gdb_st_ctime;   /* time of last change */
};

struct gdb_timeval {
  gdb_time_t tv_sec;  /* second */
  uint64_t tv_usec;   /* microsecond */
};

#define GDB_O_RDONLY   0x0
#define GDB_O_WRONLY   0x1
#define GDB_O_RDWR     0x2
#define GDB_O_APPEND   0x8
#define GDB_O_CREAT  0x200
#define GDB_O_TRUNC  0x400
#define GDB_O_EXCL   0x800

static int translate_openflags(int flags)
{
    int hf;

    if (flags & GDB_O_WRONLY)
        hf = O_WRONLY;
    else if (flags & GDB_O_RDWR)
        hf = O_RDWR;
    else
        hf = O_RDONLY;

    if (flags & GDB_O_APPEND) hf |= O_APPEND;
    if (flags & GDB_O_CREAT) hf |= O_CREAT;
    if (flags & GDB_O_TRUNC) hf |= O_TRUNC;
    if (flags & GDB_O_EXCL) hf |= O_EXCL;

    return hf;
}

static void translate_stat(struct m68k_gdb_stat *p, struct stat *s)
{
    p->gdb_st_dev = tswap16(s->st_dev);
    p->gdb_st_ino = tswap16(s->st_ino);
    p->gdb_st_mode = tswap32(s->st_mode);
    p->gdb_st_nlink = tswap16(s->st_nlink);
    p->gdb_st_uid = tswap16(s->st_uid);
    p->gdb_st_gid = tswap16(s->st_gid);
    p->gdb_st_rdev = tswap16(s->st_rdev);
    p->gdb_st_size = tswap32(s->st_size);
    p->gdb_st_atime = tswap32(s->st_atime);
    p->gdb_st_mtime = tswap32(s->st_mtime);
    p->gdb_st_ctime = tswap32(s->st_ctime);
    p->gdb_st_blksize = tswap32(s->st_blksize);
    p->gdb_st_blocks = tswap32(s->st_blocks);
}

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

#define ARG(x) tswap32(args[x])
void do_m68k_semihosting(CPUM68KState *env, int nr)
{
    uint32_t *args;

    args = (uint32_t *)env->dregs[1];
    switch (nr) {
    case HOSTED_EXIT:
        exit(env->dregs[0]);
    case HOSTED_OPEN:
        /* Assume name is NULL terminated.  */
        check_err(env, open((char *)ARG(0), translate_openflags(ARG(2)),
                            ARG(3)));
        break;
    case HOSTED_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 HOSTED_READ:
        check_err(env, read(ARG(0), (void *)ARG(1), ARG(2)));
        break;
    case HOSTED_WRITE:
        check_err(env, write(ARG(0), (void *)ARG(1), ARG(2)));
        break;
    case HOSTED_LSEEK:
        {
            uint64_t off;
            off = (uint32_t)ARG(2) | ((uint64_t)ARG(1) << 32);
            check_err(env, lseek(ARG(0), off, ARG(3)));
        }
        break;
    case HOSTED_RENAME:
        /* Assume names are NULL terminated.  */
        check_err(env, rename((char *)ARG(0), (char *)ARG(2)));
        break;
    case HOSTED_UNLINK:
        /* Assume name is NULL terminated.  */
        check_err(env, unlink((char *)ARG(0)));
        break;
    case HOSTED_STAT:
        /* Assume name is NULL terminated.  */
        {
            struct stat s;
            int rc;
            rc = check_err(env, stat((char *)ARG(0), &s));
            if (rc == 0) {
                translate_stat((struct m68k_gdb_stat *)ARG(2), &s);
            }
        }
        break;
    case HOSTED_FSTAT:
        {
            struct stat s;
            int rc;
            rc = check_err(env, fstat(ARG(0), &s));
            if (rc == 0) {
                translate_stat((struct m68k_gdb_stat *)ARG(1), &s);
            }
        }
        break;
    case HOSTED_GETTIMEOFDAY:
        {
            struct timeval tv;
            struct gdb_timeval *p;
            int rc;
            rc = check_err(env, gettimeofday(&tv, NULL));
            if (rc != 0) {
                p = (struct gdb_timeval *)ARG(0);
                p->tv_sec = tswap32(tv.tv_sec);
                p->tv_usec = tswap64(tv.tv_usec);
            }
        }
        break;
    case HOSTED_ISATTY:
        check_err(env, isatty(ARG(0)));
        break;
    case HOSTED_SYSTEM:
        /* Assume name is NULL terminated.  */
        check_err(env, system((char *)ARG(0)));
        break;
    default:
        cpu_abort(env, "Unsupported semihosting syscall %d\n", nr);
    }
}
OpenPOWER on IntegriCloud