diff options
Diffstat (limited to 'bsd-user/strace.c')
| -rw-r--r-- | bsd-user/strace.c | 191 |
1 files changed, 191 insertions, 0 deletions
diff --git a/bsd-user/strace.c b/bsd-user/strace.c new file mode 100644 index 000000000..0998dc5ba --- /dev/null +++ b/bsd-user/strace.c @@ -0,0 +1,191 @@ +#include <stdio.h> +#include <errno.h> +#include <sys/select.h> +#include <sys/types.h> +#include <unistd.h> +#include <sys/syscall.h> +#include "qemu.h" + +int do_strace=0; + +struct syscallname { + int nr; + const char *name; + const char *format; + void (*call)(const struct syscallname *, + abi_long, abi_long, abi_long, + abi_long, abi_long, abi_long); + void (*result)(const struct syscallname *, abi_long); +}; + +/* + * Utility functions + */ + +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; + + if (!(s = lock_user_string(arg1))) + 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, s_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, s_addr, 0); + } + } + + gemu_log("NULL})"); +} + +/* + * 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)); +} |