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/*
* 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 "qemu/osdep.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);
}
}
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