243 lines
6.8 KiB
C
243 lines
6.8 KiB
C
/*
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* System call tracing and debugging
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*
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stdio.h>
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#include <errno.h>
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#include <sys/select.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include <sys/syscall.h>
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#include <sys/ioccom.h>
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#include <ctype.h>
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#include "qemu.h"
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int do_strace;
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/*
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* Utility functions
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*/
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static void print_sysctl(const struct syscallname *name, abi_long arg1,
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abi_long arg2, abi_long arg3, abi_long arg4, abi_long arg5,
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abi_long arg6)
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{
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uint32_t i;
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int32_t *namep;
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gemu_log("%s({ ", name->name);
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namep = lock_user(VERIFY_READ, arg1, sizeof(int32_t) * arg2, 1);
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if (namep) {
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int32_t *p = namep;
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for (i = 0; i < (uint32_t)arg2; i++) {
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gemu_log("%d ", tswap32(*p++));
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}
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unlock_user(namep, arg1, 0);
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}
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gemu_log("}, %u, 0x" TARGET_ABI_FMT_lx ", 0x" TARGET_ABI_FMT_lx ", 0x"
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TARGET_ABI_FMT_lx ", 0x" TARGET_ABI_FMT_lx ")",
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(uint32_t)arg2, arg3, arg4, arg5, arg6);
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}
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static void print_execve(const struct syscallname *name, abi_long arg1,
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abi_long arg2, abi_long arg3, abi_long arg4, abi_long arg5,
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abi_long arg6)
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{
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abi_ulong arg_ptr_addr;
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char *s;
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s = lock_user_string(arg1);
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if (s == NULL) {
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return;
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}
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gemu_log("%s(\"%s\",{", name->name, s);
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unlock_user(s, arg1, 0);
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for (arg_ptr_addr = arg2; ; arg_ptr_addr += sizeof(abi_ulong)) {
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abi_ulong *arg_ptr, arg_addr;
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arg_ptr = lock_user(VERIFY_READ, arg_ptr_addr, sizeof(abi_ulong), 1);
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if (!arg_ptr) {
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return;
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}
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arg_addr = tswapl(*arg_ptr);
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unlock_user(arg_ptr, arg_ptr_addr, 0);
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if (!arg_addr) {
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break;
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}
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if ((s = lock_user_string(arg_addr))) {
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gemu_log("\"%s\",", s);
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unlock_user(s, arg_addr, 0);
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}
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}
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gemu_log("NULL})");
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}
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static void print_ioctl(const struct syscallname *name,
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abi_long arg1, abi_long arg2, abi_long arg3, abi_long arg4,
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abi_long arg5, abi_long arg6)
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{
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/* Decode the ioctl request */
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gemu_log("%s(%d, 0x%0lx { IO%s%s GRP:0x%x('%c') CMD:%d LEN:%d }, 0x"
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TARGET_ABI_FMT_lx ", ...)",
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name->name,
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(int)arg1,
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(unsigned long)arg2,
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arg2 & IOC_OUT ? "R" : "",
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arg2 & IOC_IN ? "W" : "",
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(unsigned)IOCGROUP(arg2),
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isprint(IOCGROUP(arg2)) ? (char)IOCGROUP(arg2) : '?',
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(int)arg2 & 0xFF,
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(int)IOCPARM_LEN(arg2),
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arg3);
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}
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/*
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* Variants for the return value output function
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*/
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static void print_syscall_ret_addr(const struct syscallname *name, abi_long ret)
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{
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if (ret == -1) {
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gemu_log(" = -1 errno=%d (%s)\n", errno, strerror(errno));
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} else {
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gemu_log(" = 0x" TARGET_ABI_FMT_lx "\n", ret);
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}
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}
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#if 0 /* currently unused */
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static void
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print_syscall_ret_raw(struct syscallname *name, abi_long ret)
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{
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gemu_log(" = 0x" TARGET_ABI_FMT_lx "\n", ret);
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}
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#endif
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/*
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* An array of all of the syscalls we know about
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*/
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static const struct syscallname freebsd_scnames[] = {
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#include "freebsd/strace.list"
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};
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static const struct syscallname netbsd_scnames[] = {
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#include "netbsd/strace.list"
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};
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static const struct syscallname openbsd_scnames[] = {
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#include "openbsd/strace.list"
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};
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static void print_syscall(int num, const struct syscallname *scnames,
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unsigned int nscnames, abi_long arg1, abi_long arg2, abi_long arg3,
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abi_long arg4, abi_long arg5, abi_long arg6)
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{
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unsigned int i;
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const char *format="%s(" TARGET_ABI_FMT_ld "," TARGET_ABI_FMT_ld ","
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TARGET_ABI_FMT_ld "," TARGET_ABI_FMT_ld "," TARGET_ABI_FMT_ld ","
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TARGET_ABI_FMT_ld ")";
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gemu_log("%d ", getpid() );
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for (i = 0; i < nscnames; i++) {
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if (scnames[i].nr == num) {
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if (scnames[i].call != NULL) {
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scnames[i].call(&scnames[i], arg1, arg2, arg3, arg4, arg5,
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arg6);
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} else {
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/* XXX: this format system is broken because it uses
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host types and host pointers for strings */
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if (scnames[i].format != NULL) {
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format = scnames[i].format;
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}
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gemu_log(format, scnames[i].name, arg1, arg2, arg3, arg4, arg5,
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arg6);
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}
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return;
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}
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}
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gemu_log("Unknown syscall %d\n", num);
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}
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static void print_syscall_ret(int num, abi_long ret,
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const struct syscallname *scnames, unsigned int nscnames)
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{
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unsigned int i;
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for (i = 0; i < nscnames; i++) {
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if (scnames[i].nr == num) {
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if (scnames[i].result != NULL) {
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scnames[i].result(&scnames[i], ret);
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} else {
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if (ret < 0) {
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gemu_log(" = -1 errno=" TARGET_ABI_FMT_ld " (%s)\n", -ret,
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strerror(-ret));
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} else {
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gemu_log(" = " TARGET_ABI_FMT_ld "\n", ret);
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}
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}
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break;
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}
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}
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}
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/*
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* The public interface to this module.
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*/
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void print_freebsd_syscall(int num, abi_long arg1, abi_long arg2, abi_long arg3,
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abi_long arg4, abi_long arg5, abi_long arg6)
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{
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print_syscall(num, freebsd_scnames, ARRAY_SIZE(freebsd_scnames), arg1, arg2,
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arg3, arg4, arg5, arg6);
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}
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void print_freebsd_syscall_ret(int num, abi_long ret)
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{
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print_syscall_ret(num, ret, freebsd_scnames, ARRAY_SIZE(freebsd_scnames));
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}
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void print_netbsd_syscall(int num, abi_long arg1, abi_long arg2, abi_long arg3,
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abi_long arg4, abi_long arg5, abi_long arg6)
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{
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print_syscall(num, netbsd_scnames, ARRAY_SIZE(netbsd_scnames),
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arg1, arg2, arg3, arg4, arg5, arg6);
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}
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void print_netbsd_syscall_ret(int num, abi_long ret)
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{
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print_syscall_ret(num, ret, netbsd_scnames, ARRAY_SIZE(netbsd_scnames));
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}
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void print_openbsd_syscall(int num, abi_long arg1, abi_long arg2, abi_long arg3,
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abi_long arg4, abi_long arg5, abi_long arg6)
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{
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print_syscall(num, openbsd_scnames, ARRAY_SIZE(openbsd_scnames), arg1, arg2,
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arg3, arg4, arg5, arg6);
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}
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void print_openbsd_syscall_ret(int num, abi_long ret)
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{
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print_syscall_ret(num, ret, openbsd_scnames, ARRAY_SIZE(openbsd_scnames));
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}
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