389 lines
11 KiB
C
389 lines
11 KiB
C
|
/*
|
||
|
|
* m68k/ColdFire Semihosting syscall interface
|
||
|
|
*
|
||
|
|
* Copyright (c) 2005-2007 CodeSourcery.
|
||
|
|
*
|
||
|
|
* 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 "cpu.h"
|
||
|
|
#include "exec/gdbstub.h"
|
||
|
|
#include "semihosting/softmmu-uaccess.h"
|
||
|
|
#include "hw/boards.h"
|
||
|
|
#include "qemu/log.h"
|
||
|
|
|
||
|
|
#define HOSTED_EXIT 0
|
||
|
|
#define HOSTED_INIT_SIM 1
|
||
|
|
#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
|
||
|
|
|
||
|
|
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(CPUM68KState *env, target_ulong addr, struct stat *s)
|
||
|
|
{
|
||
|
|
struct gdb_stat *p;
|
||
|
|
|
||
|
|
p = lock_user(VERIFY_WRITE, addr, sizeof(struct gdb_stat), 0);
|
||
|
|
if (!p) {
|
||
|
|
/* FIXME - should this return an error code? */
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
p->gdb_st_dev = cpu_to_be32(s->st_dev);
|
||
|
|
p->gdb_st_ino = cpu_to_be32(s->st_ino);
|
||
|
|
p->gdb_st_mode = cpu_to_be32(s->st_mode);
|
||
|
|
p->gdb_st_nlink = cpu_to_be32(s->st_nlink);
|
||
|
|
p->gdb_st_uid = cpu_to_be32(s->st_uid);
|
||
|
|
p->gdb_st_gid = cpu_to_be32(s->st_gid);
|
||
|
|
p->gdb_st_rdev = cpu_to_be32(s->st_rdev);
|
||
|
|
p->gdb_st_size = cpu_to_be64(s->st_size);
|
||
|
|
#ifdef _WIN32
|
||
|
|
/* Windows stat is missing some fields. */
|
||
|
|
p->gdb_st_blksize = 0;
|
||
|
|
p->gdb_st_blocks = 0;
|
||
|
|
#else
|
||
|
|
p->gdb_st_blksize = cpu_to_be64(s->st_blksize);
|
||
|
|
p->gdb_st_blocks = cpu_to_be64(s->st_blocks);
|
||
|
|
#endif
|
||
|
|
p->gdb_st_atime = cpu_to_be32(s->st_atime);
|
||
|
|
p->gdb_st_mtime = cpu_to_be32(s->st_mtime);
|
||
|
|
p->gdb_st_ctime = cpu_to_be32(s->st_ctime);
|
||
|
|
unlock_user(p, addr, sizeof(struct gdb_stat));
|
||
|
|
}
|
||
|
|
|
||
|
|
static void m68k_semi_u32_cb(CPUState *cs, uint64_t ret, int err)
|
||
|
|
{
|
||
|
|
M68kCPU *cpu = M68K_CPU(cs);
|
||
|
|
CPUM68KState *env = &cpu->env;
|
||
|
|
|
||
|
|
target_ulong args = env->dregs[1];
|
||
|
|
if (put_user_u32(ret, args) ||
|
||
|
|
put_user_u32(err, args + 4)) {
|
||
|
|
/*
|
||
|
|
* The m68k semihosting ABI does not provide any way to report this
|
||
|
|
* error to the guest, so the best we can do is log it in qemu.
|
||
|
|
* It is always a guest error not to pass us a valid argument block.
|
||
|
|
*/
|
||
|
|
qemu_log_mask(LOG_GUEST_ERROR, "m68k-semihosting: return value "
|
||
|
|
"discarded because argument block not writable\n");
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
static void m68k_semi_u64_cb(CPUState *cs, uint64_t ret, int err)
|
||
|
|
{
|
||
|
|
M68kCPU *cpu = M68K_CPU(cs);
|
||
|
|
CPUM68KState *env = &cpu->env;
|
||
|
|
|
||
|
|
target_ulong args = env->dregs[1];
|
||
|
|
if (put_user_u32(ret >> 32, args) ||
|
||
|
|
put_user_u32(ret, args + 4) ||
|
||
|
|
put_user_u32(err, args + 8)) {
|
||
|
|
/* No way to report this via m68k semihosting ABI; just log it */
|
||
|
|
qemu_log_mask(LOG_GUEST_ERROR, "m68k-semihosting: return value "
|
||
|
|
"discarded because argument block not writable\n");
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Read the input value from the argument block; fail the semihosting
|
||
|
|
* call if the memory read fails.
|
||
|
|
*/
|
||
|
|
#define GET_ARG(n) do { \
|
||
|
|
if (get_user_ual(arg ## n, args + (n) * 4)) { \
|
||
|
|
result = -1; \
|
||
|
|
errno = EFAULT; \
|
||
|
|
goto failed; \
|
||
|
|
} \
|
||
|
|
} while (0)
|
||
|
|
|
||
|
|
void do_m68k_semihosting(CPUM68KState *env, int nr)
|
||
|
|
{
|
||
|
|
CPUState *cs = env_cpu(env);
|
||
|
|
uint32_t args;
|
||
|
|
target_ulong arg0, arg1, arg2, arg3;
|
||
|
|
void *p;
|
||
|
|
void *q;
|
||
|
|
uint32_t len;
|
||
|
|
uint32_t result;
|
||
|
|
|
||
|
|
args = env->dregs[1];
|
||
|
|
switch (nr) {
|
||
|
|
case HOSTED_EXIT:
|
||
|
|
gdb_exit(env->dregs[0]);
|
||
|
|
exit(env->dregs[0]);
|
||
|
|
case HOSTED_OPEN:
|
||
|
|
GET_ARG(0);
|
||
|
|
GET_ARG(1);
|
||
|
|
GET_ARG(2);
|
||
|
|
GET_ARG(3);
|
||
|
|
if (use_gdb_syscalls()) {
|
||
|
|
gdb_do_syscall(m68k_semi_u32_cb, "open,%s,%x,%x", arg0, (int)arg1,
|
||
|
|
arg2, arg3);
|
||
|
|
return;
|
||
|
|
} else {
|
||
|
|
p = lock_user_string(arg0);
|
||
|
|
if (!p) {
|
||
|
|
/* FIXME - check error code? */
|
||
|
|
result = -1;
|
||
|
|
} else {
|
||
|
|
result = open(p, translate_openflags(arg2), arg3);
|
||
|
|
unlock_user(p, arg0, 0);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
case HOSTED_CLOSE:
|
||
|
|
{
|
||
|
|
/* Ignore attempts to close stdin/out/err. */
|
||
|
|
GET_ARG(0);
|
||
|
|
int fd = arg0;
|
||
|
|
if (fd > 2) {
|
||
|
|
if (use_gdb_syscalls()) {
|
||
|
|
gdb_do_syscall(m68k_semi_u32_cb, "close,%x", arg0);
|
||
|
|
return;
|
||
|
|
} else {
|
||
|
|
result = close(fd);
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
result = 0;
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
case HOSTED_READ:
|
||
|
|
GET_ARG(0);
|
||
|
|
GET_ARG(1);
|
||
|
|
GET_ARG(2);
|
||
|
|
len = arg2;
|
||
|
|
if (use_gdb_syscalls()) {
|
||
|
|
gdb_do_syscall(m68k_semi_u32_cb, "read,%x,%x,%x",
|
||
|
|
arg0, arg1, len);
|
||
|
|
return;
|
||
|
|
} else {
|
||
|
|
p = lock_user(VERIFY_WRITE, arg1, len, 0);
|
||
|
|
if (!p) {
|
||
|
|
/* FIXME - check error code? */
|
||
|
|
result = -1;
|
||
|
|
} else {
|
||
|
|
result = read(arg0, p, len);
|
||
|
|
unlock_user(p, arg1, len);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
case HOSTED_WRITE:
|
||
|
|
GET_ARG(0);
|
||
|
|
GET_ARG(1);
|
||
|
|
GET_ARG(2);
|
||
|
|
len = arg2;
|
||
|
|
if (use_gdb_syscalls()) {
|
||
|
|
gdb_do_syscall(m68k_semi_u32_cb, "write,%x,%x,%x",
|
||
|
|
arg0, arg1, len);
|
||
|
|
return;
|
||
|
|
} else {
|
||
|
|
p = lock_user(VERIFY_READ, arg1, len, 1);
|
||
|
|
if (!p) {
|
||
|
|
/* FIXME - check error code? */
|
||
|
|
result = -1;
|
||
|
|
} else {
|
||
|
|
result = write(arg0, p, len);
|
||
|
|
unlock_user(p, arg0, 0);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
case HOSTED_LSEEK:
|
||
|
|
{
|
||
|
|
uint64_t off;
|
||
|
|
GET_ARG(0);
|
||
|
|
GET_ARG(1);
|
||
|
|
GET_ARG(2);
|
||
|
|
GET_ARG(3);
|
||
|
|
off = (uint32_t)arg2 | ((uint64_t)arg1 << 32);
|
||
|
|
if (use_gdb_syscalls()) {
|
||
|
|
gdb_do_syscall(m68k_semi_u64_cb, "fseek,%x,%lx,%x",
|
||
|
|
arg0, off, arg3);
|
||
|
|
} else {
|
||
|
|
off = lseek(arg0, off, arg3);
|
||
|
|
m68k_semi_u64_cb(cs, off, errno);
|
||
|
|
}
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
case HOSTED_RENAME:
|
||
|
|
GET_ARG(0);
|
||
|
|
GET_ARG(1);
|
||
|
|
GET_ARG(2);
|
||
|
|
GET_ARG(3);
|
||
|
|
if (use_gdb_syscalls()) {
|
||
|
|
gdb_do_syscall(m68k_semi_u32_cb, "rename,%s,%s",
|
||
|
|
arg0, (int)arg1, arg2, (int)arg3);
|
||
|
|
return;
|
||
|
|
} else {
|
||
|
|
p = lock_user_string(arg0);
|
||
|
|
q = lock_user_string(arg2);
|
||
|
|
if (!p || !q) {
|
||
|
|
/* FIXME - check error code? */
|
||
|
|
result = -1;
|
||
|
|
} else {
|
||
|
|
result = rename(p, q);
|
||
|
|
}
|
||
|
|
unlock_user(p, arg0, 0);
|
||
|
|
unlock_user(q, arg2, 0);
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
case HOSTED_UNLINK:
|
||
|
|
GET_ARG(0);
|
||
|
|
GET_ARG(1);
|
||
|
|
if (use_gdb_syscalls()) {
|
||
|
|
gdb_do_syscall(m68k_semi_u32_cb, "unlink,%s",
|
||
|
|
arg0, (int)arg1);
|
||
|
|
return;
|
||
|
|
} else {
|
||
|
|
p = lock_user_string(arg0);
|
||
|
|
if (!p) {
|
||
|
|
/* FIXME - check error code? */
|
||
|
|
result = -1;
|
||
|
|
} else {
|
||
|
|
result = unlink(p);
|
||
|
|
unlock_user(p, arg0, 0);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
case HOSTED_STAT:
|
||
|
|
GET_ARG(0);
|
||
|
|
GET_ARG(1);
|
||
|
|
GET_ARG(2);
|
||
|
|
if (use_gdb_syscalls()) {
|
||
|
|
gdb_do_syscall(m68k_semi_u32_cb, "stat,%s,%x",
|
||
|
|
arg0, (int)arg1, arg2);
|
||
|
|
return;
|
||
|
|
} else {
|
||
|
|
struct stat s;
|
||
|
|
p = lock_user_string(arg0);
|
||
|
|
if (!p) {
|
||
|
|
/* FIXME - check error code? */
|
||
|
|
result = -1;
|
||
|
|
} else {
|
||
|
|
result = stat(p, &s);
|
||
|
|
unlock_user(p, arg0, 0);
|
||
|
|
}
|
||
|
|
if (result == 0) {
|
||
|
|
translate_stat(env, arg2, &s);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
case HOSTED_FSTAT:
|
||
|
|
GET_ARG(0);
|
||
|
|
GET_ARG(1);
|
||
|
|
if (use_gdb_syscalls()) {
|
||
|
|
gdb_do_syscall(m68k_semi_u32_cb, "fstat,%x,%x",
|
||
|
|
arg0, arg1);
|
||
|
|
return;
|
||
|
|
} else {
|
||
|
|
struct stat s;
|
||
|
|
result = fstat(arg0, &s);
|
||
|
|
if (result == 0) {
|
||
|
|
translate_stat(env, arg1, &s);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
case HOSTED_GETTIMEOFDAY:
|
||
|
|
GET_ARG(0);
|
||
|
|
GET_ARG(1);
|
||
|
|
if (use_gdb_syscalls()) {
|
||
|
|
gdb_do_syscall(m68k_semi_u32_cb, "gettimeofday,%x,%x",
|
||
|
|
arg0, arg1);
|
||
|
|
return;
|
||
|
|
} else {
|
||
|
|
struct gdb_timeval *p;
|
||
|
|
int64_t rt = g_get_real_time();
|
||
|
|
p = lock_user(VERIFY_WRITE, arg0, sizeof(struct gdb_timeval), 0);
|
||
|
|
if (!p) {
|
||
|
|
/* FIXME - check error code? */
|
||
|
|
result = -1;
|
||
|
|
} else {
|
||
|
|
result = 0;
|
||
|
|
p->tv_sec = cpu_to_be32(rt / G_USEC_PER_SEC);
|
||
|
|
p->tv_usec = cpu_to_be64(rt % G_USEC_PER_SEC);
|
||
|
|
unlock_user(p, arg0, sizeof(struct gdb_timeval));
|
||
|
|
}
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
case HOSTED_ISATTY:
|
||
|
|
GET_ARG(0);
|
||
|
|
if (use_gdb_syscalls()) {
|
||
|
|
gdb_do_syscall(m68k_semi_u32_cb, "isatty,%x", arg0);
|
||
|
|
return;
|
||
|
|
} else {
|
||
|
|
result = isatty(arg0);
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
case HOSTED_SYSTEM:
|
||
|
|
GET_ARG(0);
|
||
|
|
GET_ARG(1);
|
||
|
|
if (use_gdb_syscalls()) {
|
||
|
|
gdb_do_syscall(m68k_semi_u32_cb, "system,%s",
|
||
|
|
arg0, (int)arg1);
|
||
|
|
return;
|
||
|
|
} else {
|
||
|
|
p = lock_user_string(arg0);
|
||
|
|
if (!p) {
|
||
|
|
/* FIXME - check error code? */
|
||
|
|
result = -1;
|
||
|
|
} else {
|
||
|
|
result = system(p);
|
||
|
|
unlock_user(p, arg0, 0);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
case HOSTED_INIT_SIM:
|
||
|
|
/*
|
||
|
|
* FIXME: This is wrong for boards where RAM does not start at
|
||
|
|
* address zero.
|
||
|
|
*/
|
||
|
|
env->dregs[1] = current_machine->ram_size;
|
||
|
|
env->aregs[7] = current_machine->ram_size;
|
||
|
|
return;
|
||
|
|
default:
|
||
|
|
cpu_abort(env_cpu(env), "Unsupported semihosting syscall %d\n", nr);
|
||
|
|
result = 0;
|
||
|
|
}
|
||
|
|
failed:
|
||
|
|
m68k_semi_u32_cb(cs, result, errno);
|
||
|
|
}
|