217 lines
6.2 KiB
C
217 lines
6.2 KiB
C
/*
|
|
* 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);
|
|
}
|
|
}
|