| /* |
| * 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 "qemu/osdep.h" |
| #include <sys/select.h> |
| #include <sys/syscall.h> |
| #include <sys/ioccom.h> |
| #include <ctype.h> |
| |
| #include "qemu.h" |
| |
| #include "os-strace.h" /* OS dependent strace print functions */ |
| |
| int do_strace; |
| |
| /* |
| * Utility functions |
| */ |
| static const char * |
| get_comma(int last) |
| { |
| return (last) ? "" : ","; |
| } |
| |
| /* |
| * Prints out raw parameter using given format. Caller needs |
| * to do byte swapping if needed. |
| */ |
| static void |
| print_raw_param(const char *fmt, abi_long param, int last) |
| { |
| char format[64]; |
| |
| (void)snprintf(format, sizeof(format), "%s%s", fmt, get_comma(last)); |
| gemu_log(format, param); |
| } |
| |
| 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); |
| } |
| |
| static void print_sysarch(const struct syscallname *name, abi_long arg1, |
| abi_long arg2, abi_long arg3, abi_long arg4, abi_long arg5, |
| abi_long arg6) |
| { |
| /* This is os dependent. */ |
| do_os_print_sysarch(name, arg1, arg2, arg3, arg4, arg5, arg6); |
| } |
| |
| /* |
| * 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); |
| } |
| } |
| |
| /* |
| * 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)); |
| } |
| |
| static void |
| print_signal(abi_ulong arg, int last) |
| { |
| const char *signal_name = NULL; |
| switch (arg) { |
| case TARGET_SIGHUP: |
| signal_name = "SIGHUP"; |
| break; |
| case TARGET_SIGINT: |
| signal_name = "SIGINT"; |
| break; |
| case TARGET_SIGQUIT: |
| signal_name = "SIGQUIT"; |
| break; |
| case TARGET_SIGILL: |
| signal_name = "SIGILL"; |
| break; |
| case TARGET_SIGABRT: |
| signal_name = "SIGABRT"; |
| break; |
| case TARGET_SIGFPE: |
| signal_name = "SIGFPE"; |
| break; |
| case TARGET_SIGKILL: |
| signal_name = "SIGKILL"; |
| break; |
| case TARGET_SIGSEGV: |
| signal_name = "SIGSEGV"; |
| break; |
| case TARGET_SIGPIPE: |
| signal_name = "SIGPIPE"; |
| break; |
| case TARGET_SIGALRM: |
| signal_name = "SIGALRM"; |
| break; |
| case TARGET_SIGTERM: |
| signal_name = "SIGTERM"; |
| break; |
| case TARGET_SIGUSR1: |
| signal_name = "SIGUSR1"; |
| break; |
| case TARGET_SIGUSR2: |
| signal_name = "SIGUSR2"; |
| break; |
| case TARGET_SIGCHLD: |
| signal_name = "SIGCHLD"; |
| break; |
| case TARGET_SIGCONT: |
| signal_name = "SIGCONT"; |
| break; |
| case TARGET_SIGSTOP: |
| signal_name = "SIGSTOP"; |
| break; |
| case TARGET_SIGTTIN: |
| signal_name = "SIGTTIN"; |
| break; |
| case TARGET_SIGTTOU: |
| signal_name = "SIGTTOU"; |
| break; |
| } |
| if (signal_name == NULL) { |
| print_raw_param("%ld", arg, last); |
| return; |
| } |
| gemu_log("%s%s", signal_name, get_comma(last)); |
| } |
| |
| void print_taken_signal(int target_signum, const target_siginfo_t *tinfo) |
| { |
| /* |
| * Print the strace output for a signal being taken: |
| * --- SIGSEGV {si_signo=SIGSEGV, si_code=SI_KERNEL, si_addr=0} --- |
| */ |
| gemu_log("%d ", getpid()); |
| gemu_log("--- "); |
| print_signal(target_signum, 1); |
| gemu_log(" ---\n"); |
| } |
