/*
* System call tracing and debugging
*
*
* 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 <stdio.h>
#include <errno.h>
#include <sys/select.h>
#include <sys/types.h>
#include <unistd.h>
#include <sys/syscall.h>
#include <sys/ioccom.h>
#include <ctype.h>
#include "qemu.h"
int do_strace;
/*
* Utility functions
*/
static void print_sysctl(const struct syscallname *name, abi_long arg1,
abi_long arg2, abi_long arg3, abi_long arg4, abi_long arg5,
abi_long arg6)
{
uint32_t i;
int32_t *namep;
gemu_log("%s({ ", name->name);
namep = lock_user(VERIFY_READ, arg1, sizeof(int32_t) * arg2, 1);
if (namep) {
int32_t *p = namep;
for (i = 0; i < (uint32_t)arg2; i++) {
gemu_log("%d ", tswap32(*p++));
}
unlock_user(namep, arg1, 0);
}
gemu_log("}, %u, 0x" TARGET_ABI_FMT_lx ", 0x" TARGET_ABI_FMT_lx ", 0x"
TARGET_ABI_FMT_lx ", 0x" TARGET_ABI_FMT_lx ")",
(uint32_t)arg2, arg3, arg4, arg5, arg6);
}
static void print_execve(const struct syscallname *name, abi_long arg1,
abi_long arg2, abi_long arg3, abi_long arg4, abi_long arg5,
abi_long arg6)
{
abi_ulong arg_ptr_addr;
char *s;
s = lock_user_string(arg1);
if (s == NULL) {
return;
}
gemu_log("%s(\"%s\",{", name->name, s);
unlock_user(s, arg1, 0);
for (arg_ptr_addr = arg2; ; arg_ptr_addr += sizeof(abi_ulong)) {
abi_ulong *arg_ptr, arg_addr;
arg_ptr = lock_user(VERIFY_READ, arg_ptr_addr, sizeof(abi_ulong), 1);
if (!arg_ptr) {
return;
}
arg_addr = tswapl(*arg_ptr);
unlock_user(arg_ptr, arg_ptr_addr, 0);
if (!arg_addr) {
break;
}
if ((s = lock_user_string(arg_addr))) {
gemu_log("\"%s\",", s);
unlock_user(s, arg_addr, 0);
}
}
gemu_log("NULL})");
}
static void print_ioctl(const struct syscallname *name,
abi_long arg1, abi_long arg2, abi_long arg3, abi_long arg4,
abi_long arg5, abi_long arg6)
{
/* Decode the ioctl request */
gemu_log("%s(%d, 0x%0lx { IO%s%s GRP:0x%x('%c') CMD:%d LEN:%d }, 0x"
TARGET_ABI_FMT_lx ", ...)",
name->name,
(int)arg1,
(unsigned long)arg2,
arg2 & IOC_OUT ? "R" : "",
arg2 & IOC_IN ? "W" : "",
(unsigned)IOCGROUP(arg2),
isprint(IOCGROUP(arg2)) ? (char)IOCGROUP(arg2) : '?',
(int)arg2 & 0xFF,
(int)IOCPARM_LEN(arg2),
arg3);
}
/*
* Variants for the return value output function
*/
static void print_syscall_ret_addr(const struct syscallname *name, abi_long ret)
{
if (ret == -1) {
gemu_log(" = -1 errno=%d (%s)\n", errno, strerror(errno));
} else {
gemu_log(" = 0x" TARGET_ABI_FMT_lx "\n", ret);
}
}
#if 0 /* currently unused */
static void
print_syscall_ret_raw(struct syscallname *name, abi_long ret)
{
gemu_log(" = 0x" TARGET_ABI_FMT_lx "\n", ret);
}
#endif
/*
* An array of all of the syscalls we know about
*/
static const struct syscallname freebsd_scnames[] = {
#include "freebsd/strace.list"
};
static const struct syscallname netbsd_scnames[] = {
#include "netbsd/strace.list"
};
static const struct syscallname openbsd_scnames[] = {
#include "openbsd/strace.list"
};
static void print_syscall(int num, const struct syscallname *scnames,
unsigned int nscnames, abi_long arg1, abi_long arg2, abi_long arg3,
abi_long arg4, abi_long arg5, abi_long arg6)
{
unsigned int i;
const char *format="%s(" TARGET_ABI_FMT_ld "," TARGET_ABI_FMT_ld ","
TARGET_ABI_FMT_ld "," TARGET_ABI_FMT_ld "," TARGET_ABI_FMT_ld ","
TARGET_ABI_FMT_ld ")";
gemu_log("%d ", getpid() );
for (i = 0; i < nscnames; i++) {
if (scnames[i].nr == num) {
if (scnames[i].call != NULL) {
scnames[i].call(&scnames[i], arg1, arg2, arg3, arg4, arg5,
arg6);
} else {
/* XXX: this format system is broken because it uses
host types and host pointers for strings */
if (scnames[i].format != NULL) {
format = scnames[i].format;
}
gemu_log(format, scnames[i].name, arg1, arg2, arg3, arg4, arg5,
arg6);
}
return;
}
}
gemu_log("Unknown syscall %d\n", num);
}
static void print_syscall_ret(int num, abi_long ret,
const struct syscallname *scnames, unsigned int nscnames)
{
unsigned int i;
for (i = 0; i < nscnames; i++) {
if (scnames[i].nr == num) {
if (scnames[i].result != NULL) {
scnames[i].result(&scnames[i], ret);
} else {
if (ret < 0) {
gemu_log(" = -1 errno=" TARGET_ABI_FMT_ld " (%s)\n", -ret,
strerror(-ret));
} else {
gemu_log(" = " TARGET_ABI_FMT_ld "\n", ret);
}
}
break;
}
}
}
/*
* The public interface to this module.
*/
void print_freebsd_syscall(int num, abi_long arg1, abi_long arg2, abi_long arg3,
abi_long arg4, abi_long arg5, abi_long arg6)
{
print_syscall(num, freebsd_scnames, ARRAY_SIZE(freebsd_scnames), arg1, arg2,
arg3, arg4, arg5, arg6);
}
void print_freebsd_syscall_ret(int num, abi_long ret)
{
print_syscall_ret(num, ret, freebsd_scnames, ARRAY_SIZE(freebsd_scnames));
}
void print_netbsd_syscall(int num, abi_long arg1, abi_long arg2, abi_long arg3,
abi_long arg4, abi_long arg5, abi_long arg6)
{
print_syscall(num, netbsd_scnames, ARRAY_SIZE(netbsd_scnames),
arg1, arg2, arg3, arg4, arg5, arg6);
}
void print_netbsd_syscall_ret(int num, abi_long ret)
{
print_syscall_ret(num, ret, netbsd_scnames, ARRAY_SIZE(netbsd_scnames));
}
void print_openbsd_syscall(int num, abi_long arg1, abi_long arg2, abi_long arg3,
abi_long arg4, abi_long arg5, abi_long arg6)
{
print_syscall(num, openbsd_scnames, ARRAY_SIZE(openbsd_scnames), arg1, arg2,
arg3, arg4, arg5, arg6);
}
void print_openbsd_syscall_ret(int num, abi_long ret)
{
print_syscall_ret(num, ret, openbsd_scnames, ARRAY_SIZE(openbsd_scnames));
}
