diff options
Diffstat (limited to 'src/bsd-user/strace.c')
| -rw-r--r-- | src/bsd-user/strace.c | 242 |
1 files changed, 242 insertions, 0 deletions
diff --git a/src/bsd-user/strace.c b/src/bsd-user/strace.c new file mode 100644 index 0000000..e33dd4d --- /dev/null +++ b/src/bsd-user/strace.c @@ -0,0 +1,242 @@ +/* + * 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)); +} |
