diff options
Diffstat (limited to 'usr.bin/truss/syscalls.c')
| -rw-r--r-- | usr.bin/truss/syscalls.c | 176 |
1 files changed, 95 insertions, 81 deletions
diff --git a/usr.bin/truss/syscalls.c b/usr.bin/truss/syscalls.c index 638ce5a..f46a2e1 100644 --- a/usr.bin/truss/syscalls.c +++ b/usr.bin/truss/syscalls.c @@ -29,10 +29,8 @@ * SUCH DAMAGE. */ -#ifndef lint -static const char rcsid[] = - "$FreeBSD$"; -#endif /* not lint */ +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); /* * This file has routines used to print out system calls and their @@ -40,23 +38,20 @@ static const char rcsid[] = */ #include <sys/types.h> +#include <sys/event.h> +#include <sys/ioccom.h> #include <sys/mman.h> #include <sys/procctl.h> #include <sys/ptrace.h> +#include <sys/resource.h> #include <sys/socket.h> -#include <sys/time.h> +#include <sys/stat.h> +#include <sys/umtx.h> #include <sys/un.h> #include <sys/wait.h> +#include <machine/sysarch.h> #include <netinet/in.h> #include <arpa/inet.h> -#include <sys/ioccom.h> -#include <machine/atomic.h> -#include <errno.h> -#include <sys/umtx.h> -#include <sys/event.h> -#include <sys/stat.h> -#include <sys/resource.h> -#include <machine/sysarch.h> #include <ctype.h> #include <err.h> @@ -95,26 +90,16 @@ static const char rcsid[] = static struct syscall syscalls[] = { { .name = "fcntl", .ret_type = 1, .nargs = 3, .args = { { Int, 0 }, { Fcntl, 1 }, { Fcntlflag, 2 } } }, - { .name = "fork", .ret_type = 1, .nargs = 0 }, - { .name = "vfork", .ret_type = 1, .nargs = 0 }, { .name = "rfork", .ret_type = 1, .nargs = 1, .args = { { Rforkflags, 0 } } }, - { .name = "getegid", .ret_type = 1, .nargs = 0 }, - { .name = "geteuid", .ret_type = 1, .nargs = 0 }, { .name = "linux_readlink", .ret_type = 1, .nargs = 3, .args = { { Name, 0 }, { Name | OUT, 1 }, { Int, 2 } } }, { .name = "linux_socketcall", .ret_type = 1, .nargs = 2, .args = { { Int, 0 }, { LinuxSockArgs, 1 } } }, - { .name = "getgid", .ret_type = 1, .nargs = 0 }, - { .name = "getpid", .ret_type = 1, .nargs = 0 }, { .name = "getpgid", .ret_type = 1, .nargs = 1, .args = { { Int, 0 } } }, - { .name = "getpgrp", .ret_type = 1, .nargs = 0 }, - { .name = "getppid", .ret_type = 1, .nargs = 0 }, { .name = "getsid", .ret_type = 1, .nargs = 1, .args = { { Int, 0 } } }, - { .name = "getuid", .ret_type = 1, .nargs = 0 }, - { .name = "issetugid", .ret_type = 1, .nargs = 0 }, { .name = "readlink", .ret_type = 1, .nargs = 3, .args = { { Name, 0 }, { Readlinkres | OUT, 1 }, { Int, 2 } } }, { .name = "readlinkat", .ret_type = 1, .nargs = 4, @@ -125,7 +110,7 @@ static struct syscall syscalls[] = { { Whence, 1 + QUAD_SLOTS + QUAD_ALIGN } } }, { .name = "linux_lseek", .ret_type = 2, .nargs = 3, .args = { { Int, 0 }, { Int, 1 }, { Whence, 2 } } }, - { .name = "mmap", .ret_type = 2, .nargs = 6, + { .name = "mmap", .ret_type = 1, .nargs = 6, .args = { { Ptr, 0 }, { Int, 1 }, { Mprot, 2 }, { Mmapflags, 3 }, { Int, 4 }, { Quad, 5 + QUAD_ALIGN } } }, { .name = "linux_mkdir", .ret_type = 1, .nargs = 2, @@ -145,49 +130,49 @@ static struct syscall syscalls[] = { .args = { { Name, 0 }, { Hex, 1 }, { Octal, 2 } } }, { .name = "close", .ret_type = 1, .nargs = 1, .args = { { Int, 0 } } }, - { .name = "link", .ret_type = 0, .nargs = 2, + { .name = "link", .ret_type = 1, .nargs = 2, .args = { { Name, 0 }, { Name, 1 } } }, - { .name = "linkat", .ret_type = 0, .nargs = 5, + { .name = "linkat", .ret_type = 1, .nargs = 5, .args = { { Atfd, 0 }, { Name, 1 }, { Atfd, 2 }, { Name, 3 }, { Atflags, 4 } } }, - { .name = "unlink", .ret_type = 0, .nargs = 1, + { .name = "unlink", .ret_type = 1, .nargs = 1, .args = { { Name, 0 } } }, - { .name = "unlinkat", .ret_type = 0, .nargs = 3, + { .name = "unlinkat", .ret_type = 1, .nargs = 3, .args = { { Atfd, 0 }, { Name, 1 }, { Atflags, 2 } } }, - { .name = "chdir", .ret_type = 0, .nargs = 1, + { .name = "chdir", .ret_type = 1, .nargs = 1, .args = { { Name, 0 } } }, - { .name = "chroot", .ret_type = 0, .nargs = 1, + { .name = "chroot", .ret_type = 1, .nargs = 1, .args = { { Name, 0 } } }, - { .name = "mkfifo", .ret_type = 0, .nargs = 2, + { .name = "mkfifo", .ret_type = 1, .nargs = 2, .args = { { Name, 0 }, { Octal, 1 } } }, - { .name = "mkfifoat", .ret_type = 0, .nargs = 3, + { .name = "mkfifoat", .ret_type = 1, .nargs = 3, .args = { { Atfd, 0 }, { Name, 1 }, { Octal, 2 } } }, - { .name = "mknod", .ret_type = 0, .nargs = 3, + { .name = "mknod", .ret_type = 1, .nargs = 3, .args = { { Name, 0 }, { Octal, 1 }, { Int, 2 } } }, - { .name = "mknodat", .ret_type = 0, .nargs = 4, + { .name = "mknodat", .ret_type = 1, .nargs = 4, .args = { { Atfd, 0 }, { Name, 1 }, { Octal, 2 }, { Int, 3 } } }, - { .name = "chmod", .ret_type = 0, .nargs = 2, + { .name = "chmod", .ret_type = 1, .nargs = 2, .args = { { Name, 0 }, { Octal, 1 } } }, - { .name = "fchmod", .ret_type = 0, .nargs = 2, + { .name = "fchmod", .ret_type = 1, .nargs = 2, .args = { { Int, 0 }, { Octal, 1 } } }, - { .name = "lchmod", .ret_type = 0, .nargs = 2, + { .name = "lchmod", .ret_type = 1, .nargs = 2, .args = { { Name, 0 }, { Octal, 1 } } }, - { .name = "fchmodat", .ret_type = 0, .nargs = 4, + { .name = "fchmodat", .ret_type = 1, .nargs = 4, .args = { { Atfd, 0 }, { Name, 1 }, { Octal, 2 }, { Atflags, 3 } } }, - { .name = "chown", .ret_type = 0, .nargs = 3, + { .name = "chown", .ret_type = 1, .nargs = 3, .args = { { Name, 0 }, { Int, 1 }, { Int, 2 } } }, - { .name = "fchown", .ret_type = 0, .nargs = 3, + { .name = "fchown", .ret_type = 1, .nargs = 3, .args = { { Int, 0 }, { Int, 1 }, { Int, 2 } } }, - { .name = "lchown", .ret_type = 0, .nargs = 3, + { .name = "lchown", .ret_type = 1, .nargs = 3, .args = { { Name, 0 }, { Int, 1 }, { Int, 2 } } }, - { .name = "fchownat", .ret_type = 0, .nargs = 5, + { .name = "fchownat", .ret_type = 1, .nargs = 5, .args = { { Atfd, 0 }, { Name, 1 }, { Int, 2 }, { Int, 3 }, { Atflags, 4 } } }, { .name = "linux_stat64", .ret_type = 1, .nargs = 3, .args = { { Name | IN, 0 }, { Ptr | OUT, 1 }, { Ptr | IN, 1 } } }, - { .name = "mount", .ret_type = 0, .nargs = 4, + { .name = "mount", .ret_type = 1, .nargs = 4, .args = { { Name, 0 }, { Name, 1 }, { Int, 2 }, { Ptr, 3 } } }, - { .name = "umount", .ret_type = 0, .nargs = 2, + { .name = "umount", .ret_type = 1, .nargs = 2, .args = { { Name, 0 }, { Int, 2 } } }, { .name = "fstat", .ret_type = 1, .nargs = 2, .args = { { Int, 0 }, { Stat | OUT, 1 } } }, @@ -250,19 +235,19 @@ static struct syscall syscalls[] = { { .name = "linux_execve", .ret_type = 1, .nargs = 3, .args = { { Name | IN, 0 }, { ExecArgs | IN, 1 }, { ExecEnv | IN, 2 } } }, - { .name = "kldload", .ret_type = 0, .nargs = 1, + { .name = "kldload", .ret_type = 1, .nargs = 1, .args = { { Name | IN, 0 } } }, - { .name = "kldunload", .ret_type = 0, .nargs = 1, + { .name = "kldunload", .ret_type = 1, .nargs = 1, .args = { { Int, 0 } } }, - { .name = "kldfind", .ret_type = 0, .nargs = 1, + { .name = "kldfind", .ret_type = 1, .nargs = 1, .args = { { Name | IN, 0 } } }, - { .name = "kldnext", .ret_type = 0, .nargs = 1, + { .name = "kldnext", .ret_type = 1, .nargs = 1, .args = { { Int, 0 } } }, - { .name = "kldstat", .ret_type = 0, .nargs = 2, + { .name = "kldstat", .ret_type = 1, .nargs = 2, .args = { { Int, 0 }, { Ptr, 1 } } }, - { .name = "kldfirstmod", .ret_type = 0, .nargs = 1, + { .name = "kldfirstmod", .ret_type = 1, .nargs = 1, .args = { { Int, 0 } } }, - { .name = "nanosleep", .ret_type = 0, .nargs = 1, + { .name = "nanosleep", .ret_type = 1, .nargs = 1, .args = { { Timespec, 0 } } }, { .name = "select", .ret_type = 1, .nargs = 5, .args = { { Int, 0 }, { Fd_set, 1 }, { Fd_set, 2 }, { Fd_set, 3 }, @@ -279,18 +264,18 @@ static struct syscall syscalls[] = { .args = { { Int, 0 }, { Itimerval, 1 }, { Itimerval | OUT, 2 } } }, { .name = "kse_release", .ret_type = 0, .nargs = 1, .args = { { Timespec, 0 } } }, - { .name = "kevent", .ret_type = 0, .nargs = 6, + { .name = "kevent", .ret_type = 1, .nargs = 6, .args = { { Int, 0 }, { Kevent, 1 }, { Int, 2 }, { Kevent | OUT, 3 }, { Int, 4 }, { Timespec, 5 } } }, - { .name = "sigpending", .ret_type = 0, .nargs = 1, + { .name = "sigpending", .ret_type = 1, .nargs = 1, .args = { { Sigset | OUT, 0 } } }, - { .name = "sigprocmask", .ret_type = 0, .nargs = 3, + { .name = "sigprocmask", .ret_type = 1, .nargs = 3, .args = { { Sigprocmask, 0 }, { Sigset, 1 }, { Sigset | OUT, 2 } } }, - { .name = "sigqueue", .ret_type = 0, .nargs = 3, + { .name = "sigqueue", .ret_type = 1, .nargs = 3, .args = { { Int, 0 }, { Signal, 1 }, { LongHex, 2 } } }, - { .name = "sigreturn", .ret_type = 0, .nargs = 1, + { .name = "sigreturn", .ret_type = 1, .nargs = 1, .args = { { Ptr, 0 } } }, - { .name = "sigsuspend", .ret_type = 0, .nargs = 1, + { .name = "sigsuspend", .ret_type = 1, .nargs = 1, .args = { { Sigset | IN, 0 } } }, { .name = "sigtimedwait", .ret_type = 1, .nargs = 3, .args = { { Sigset | IN, 0 }, { Ptr, 1 }, { Timespec | IN, 2 } } }, @@ -332,7 +317,7 @@ static struct syscall syscalls[] = { { .name = "pathconf", .ret_type = 1, .nargs = 2, .args = { { Name | IN, 0 }, { Pathconf, 1 } } }, { .name = "pipe", .ret_type = 1, .nargs = 1, - .args = { { Ptr, 0 } } }, + .args = { { PipeFds | OUT, 0 } } }, { .name = "pipe2", .ret_type = 1, .nargs = 2, .args = { { Ptr, 0 }, { Open, 1 } } }, { .name = "truncate", .ret_type = 1, .nargs = 3, @@ -368,9 +353,9 @@ static struct syscall syscalls[] = { { .name = "_umtx_op", .ret_type = 1, .nargs = 5, .args = { { Ptr, 0 }, { Umtxop, 1 }, { LongHex, 2 }, { Ptr, 3 }, { Ptr, 4 } } }, - { .name = "thr_kill", .ret_type = 0, .nargs = 2, + { .name = "thr_kill", .ret_type = 1, .nargs = 2, .args = { { Long, 0 }, { Signal, 1 } } }, - { .name = "thr_self", .ret_type = 0, .nargs = 1, + { .name = "thr_self", .ret_type = 1, .nargs = 1, .args = { { Ptr, 0 } } }, { .name = 0 }, }; @@ -836,7 +821,7 @@ print_kevent(FILE *fp, struct kevent *ke, int input) * an array of all of the system call arguments. */ char * -print_arg(struct syscall_args *sc, unsigned long *args, long retval, +print_arg(struct syscall_args *sc, unsigned long *args, long *retval, struct trussinfo *trussinfo) { FILE *fp; @@ -845,7 +830,7 @@ print_arg(struct syscall_args *sc, unsigned long *args, long retval, pid_t pid; fp = open_memstream(&tmp, &tmplen); - pid = trussinfo->pid; + pid = trussinfo->curthread->proc->pid; switch (sc->type & ARG_MASK) { case Hex: fprintf(fp, "0x%x", (int)args[sc->offset]); @@ -884,7 +869,7 @@ print_arg(struct syscall_args *sc, unsigned long *args, long retval, int truncated = 0; if (sc->type & OUT) - len = retval; + len = retval[0]; else len = args[sc->offset + 1]; @@ -924,7 +909,7 @@ print_arg(struct syscall_args *sc, unsigned long *args, long retval, } u; char *string; size_t len; - int first, i; + u_int first, i; /* * Only parse argv[] and environment arrays from exec calls @@ -987,7 +972,13 @@ print_arg(struct syscall_args *sc, unsigned long *args, long retval, case Quad: { unsigned long long ll; - ll = *(unsigned long long *)(args + sc->offset); +#if _BYTE_ORDER == _LITTLE_ENDIAN + ll = (unsigned long long)args[sc->offset + 1] << 32 | + args[sc->offset]; +#else + ll = (unsigned long long)args[sc->offset] << 32 | + args[sc->offset + 1]; +#endif fprintf(fp, "0x%llx", ll); break; } @@ -998,9 +989,9 @@ print_arg(struct syscall_args *sc, unsigned long *args, long retval, case Readlinkres: { char *tmp2; - if (retval == -1) + if (retval[0] == -1) break; - tmp2 = get_string(pid, (void*)args[sc->offset], retval); + tmp2 = get_string(pid, (void*)args[sc->offset], retval[0]); fprintf(fp, "\"%s\"", tmp2); free(tmp2); break; @@ -1397,8 +1388,8 @@ print_arg(struct syscall_args *sc, unsigned long *args, long retval, if (sc->offset == 1) numevents = args[sc->offset+1]; - else if (sc->offset == 3 && retval != -1) - numevents = retval; + else if (sc->offset == 3 && retval[0] != -1) + numevents = retval[0]; if (numevents >= 0) { bytes = sizeof(struct kevent) * numevents; @@ -1517,6 +1508,21 @@ print_arg(struct syscall_args *sc, unsigned long *args, long retval, case Sysarch: fputs(xlookup(sysarch_ops, args[sc->offset]), fp); break; + case PipeFds: + /* + * The pipe() system call in the kernel returns its + * two file descriptors via return values. However, + * the interface exposed by libc is that pipe() + * accepts a pointer to an array of descriptors. + * Format the output to match the libc API by printing + * the returned file descriptors as a fake argument. + * + * Overwrite the first retval to signal a successful + * return as well. + */ + fprintf(fp, "{ %ld, %ld }", retval[0], retval[1]); + retval[0] = 0; + break; default: errx(1, "Invalid argument type %d\n", sc->type & ARG_MASK); } @@ -1538,7 +1544,8 @@ print_syscall(struct trussinfo *trussinfo, const char *name, int nargs, len = 0; if (trussinfo->flags & FOLLOWFORKS) - len += fprintf(trussinfo->outfile, "%5d: ", trussinfo->pid); + len += fprintf(trussinfo->outfile, "%5d: ", + trussinfo->curthread->proc->pid); if (name != NULL && (strcmp(name, "execve") == 0 || strcmp(name, "exit") == 0)) { @@ -1577,7 +1584,7 @@ print_syscall(struct trussinfo *trussinfo, const char *name, int nargs, void print_syscall_ret(struct trussinfo *trussinfo, const char *name, int nargs, - char **s_args, int errorp, long retval, struct syscall *sc) + char **s_args, int errorp, long *retval, struct syscall *sc) { struct timespec timediff; @@ -1597,17 +1604,24 @@ print_syscall_ret(struct trussinfo *trussinfo, const char *name, int nargs, print_syscall(trussinfo, name, nargs, s_args); fflush(trussinfo->outfile); if (errorp) - fprintf(trussinfo->outfile, " ERR#%ld '%s'\n", retval, - strerror(retval)); - else { - /* - * Because pipe(2) has a special assembly glue to provide the - * libc API, we have to adjust retval. - */ - if (name != NULL && strcmp(name, "pipe") == 0) - retval = 0; - fprintf(trussinfo->outfile, " = %ld (0x%lx)\n", retval, retval); + fprintf(trussinfo->outfile, " ERR#%ld '%s'\n", retval[0], + strerror(retval[0])); +#ifndef __LP64__ + else if (sc != NULL && sc->ret_type == 2) { + off_t off; + +#if _BYTE_ORDER == _LITTLE_ENDIAN + off = (off_t)retval[1] << 32 | retval[0]; +#else + off = (off_t)retval[0] << 32 | retval[1]; +#endif + fprintf(trussinfo->outfile, " = %jd (0x%jx)\n", (intmax_t)off, + (intmax_t)off); } +#endif + else + fprintf(trussinfo->outfile, " = %ld (0x%lx)\n", retval[0], + retval[0]); } void |
