diff options
author | cvs2svn <cvs2svn@FreeBSD.org> | 2008-05-16 15:34:08 +0000 |
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committer | cvs2svn <cvs2svn@FreeBSD.org> | 2008-05-16 15:34:08 +0000 |
commit | 63a8deb08bc8f0b2c0c29e16e71f1f663d5c6ac4 (patch) | |
tree | 4634b6346f1b23a4cd2910cc3daff372829f8953 /usr.bin/truss | |
parent | 143ec1117dc01c2ff3f08b7ed9c3bf2c9bfb3f6b (diff) |
Notes
Diffstat (limited to 'usr.bin/truss')
-rw-r--r-- | usr.bin/truss/amd64-fbsd32.c | 346 | ||||
-rw-r--r-- | usr.bin/truss/amd64-linux32.c | 316 | ||||
-rw-r--r-- | usr.bin/truss/amd64linux32.conf | 13 | ||||
-rw-r--r-- | usr.bin/truss/fbsd32.conf | 13 |
4 files changed, 688 insertions, 0 deletions
diff --git a/usr.bin/truss/amd64-fbsd32.c b/usr.bin/truss/amd64-fbsd32.c new file mode 100644 index 0000000000000..64157e30c7b6a --- /dev/null +++ b/usr.bin/truss/amd64-fbsd32.c @@ -0,0 +1,346 @@ +/* + * Copryight 1997 Sean Eric Fagan + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by Sean Eric Fagan + * 4. Neither the name of the author may be used to endorse or promote + * products derived from this software without specific prior written + * permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#ifndef lint +static const char rcsid[] = + "$FreeBSD$"; +#endif /* not lint */ + +/* + * FreeBSD/i386-specific system call handling. This is probably the most + * complex part of the entire truss program, although I've got lots of + * it handled relatively cleanly now. The system call names are generated + * automatically, thanks to /usr/src/sys/kern/syscalls.master. The + * names used for the various structures are confusing, I sadly admit. + */ + +#include <sys/types.h> +#include <sys/syscall.h> +#include <sys/ptrace.h> + +#include <machine/reg.h> +#include <machine/psl.h> + +#include <errno.h> +#include <fcntl.h> +#include <signal.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <time.h> +#include <unistd.h> + +#include "truss.h" +#include "syscall.h" +#include "extern.h" + +static int cpid = -1; + +#include "freebsd32_syscalls.h" + +static int nsyscalls = sizeof(freebsd32_syscallnames) / + sizeof(freebsd32_syscallnames[0]); + +/* + * This is what this particular file uses to keep track of a system call. + * It is probably not quite sufficient -- I can probably use the same + * structure for the various syscall personalities, and I also probably + * need to nest system calls (for signal handlers). + * + * 'struct syscall' describes the system call; it may be NULL, however, + * if we don't know about this particular system call yet. + */ +static struct freebsd32_syscall { + struct syscall *sc; + const char *name; + int number; + unsigned long *args; + unsigned int *args32; + int nargs; /* number of arguments -- *not* number of words! */ + char **s_args; /* the printable arguments */ +} fsc; + +/* Clear up and free parts of the fsc structure. */ +static __inline void +clear_fsc(void) { + if (fsc.args) { + free(fsc.args); + } + if (fsc.args32) { + free(fsc.args32); + } + if (fsc.s_args) { + int i; + for (i = 0; i < fsc.nargs; i++) + if (fsc.s_args[i]) + free(fsc.s_args[i]); + free(fsc.s_args); + } + memset(&fsc, 0, sizeof(fsc)); +} + +/* + * Called when a process has entered a system call. nargs is the + * number of words, not number of arguments (a necessary distinction + * in some cases). Note that if the STOPEVENT() code in i386/i386/trap.c + * is ever changed these functions need to keep up. + */ + +void +amd64_fbsd32_syscall_entry(struct trussinfo *trussinfo, int nargs) { + struct reg regs; + int syscall_num; + int i; + unsigned long parm_offset; + struct syscall *sc = NULL; + struct ptrace_io_desc iorequest; + cpid = trussinfo->curthread->tid; + + clear_fsc(); + + if (ptrace(PT_GETREGS, cpid, (caddr_t)®s, 0) < 0) + { + fprintf(trussinfo->outfile, "-- CANNOT READ REGISTERS --\n"); + return; + } + parm_offset = regs.r_rsp + sizeof(int); + + /* + * FreeBSD has two special kinds of system call redirctions -- + * SYS_syscall, and SYS___syscall. The former is the old syscall() + * routine, basicly; the latter is for quad-aligned arguments. + */ + syscall_num = regs.r_rax; + switch (syscall_num) { + case SYS_syscall: + syscall_num = ptrace(PT_READ_D, cpid, (caddr_t)parm_offset, 0); + parm_offset += sizeof(int); + break; + case SYS___syscall: + syscall_num = ptrace(PT_READ_D, cpid, (caddr_t)parm_offset, 0); + parm_offset += sizeof(quad_t); + break; + } + + fsc.number = syscall_num; + fsc.name = + (syscall_num < 0 || syscall_num > nsyscalls) ? NULL : + freebsd32_syscallnames[syscall_num]; + if (!fsc.name) { + fprintf(trussinfo->outfile, "-- UNKNOWN SYSCALL %d --\n", syscall_num); + } + + if (fsc.name && (trussinfo->flags & FOLLOWFORKS) + && ((!strcmp(fsc.name, "fork") + || !strcmp(fsc.name, "rfork") + || !strcmp(fsc.name, "vfork")))) + { + trussinfo->curthread->in_fork = 1; + } + + if (nargs == 0) + return; + + fsc.args32 = malloc((1+nargs) * sizeof(unsigned int)); + iorequest.piod_op = PIOD_READ_D; + iorequest.piod_offs = (void *)parm_offset; + iorequest.piod_addr = fsc.args32; + iorequest.piod_len = (1+nargs) * sizeof(unsigned int); + ptrace(PT_IO, cpid, (caddr_t)&iorequest, 0); + if (iorequest.piod_len == 0) + return; + + fsc.args = malloc((1+nargs) * sizeof(unsigned long)); + for (i = 0; i < nargs + 1; i++) + fsc.args[i] = fsc.args32[i]; + + if (fsc.name) + sc = get_syscall(fsc.name); + if (sc) { + fsc.nargs = sc->nargs; + } else { +#if DEBUG + fprintf(trussinfo->outfile, "unknown syscall %s -- setting args to %d\n", + fsc.name, nargs); +#endif + fsc.nargs = nargs; + } + + fsc.s_args = malloc((1+fsc.nargs) * sizeof(char*)); + memset(fsc.s_args, 0, fsc.nargs * sizeof(char*)); + fsc.sc = sc; + + /* + * At this point, we set up the system call arguments. + * We ignore any OUT ones, however -- those are arguments that + * are set by the system call, and so are probably meaningless + * now. This doesn't currently support arguments that are + * passed in *and* out, however. + */ + + if (fsc.name) { + +#if DEBUG + fprintf(stderr, "syscall %s(", fsc.name); +#endif + for (i = 0; i < fsc.nargs; i++) { +#if DEBUG + fprintf(stderr, "0x%x%s", + sc + ? fsc.args[sc->args[i].offset] + : fsc.args[i], + i < (fsc.nargs - 1) ? "," : ""); +#endif + if (sc && !(sc->args[i].type & OUT)) { + fsc.s_args[i] = print_arg(&sc->args[i], fsc.args, 0, trussinfo); + } + } +#if DEBUG + fprintf(stderr, ")\n"); +#endif + } + +#if DEBUG + fprintf(trussinfo->outfile, "\n"); +#endif + + if (fsc.name != NULL && + (!strcmp(fsc.name, "freebsd32_execve") || !strcmp(fsc.name, "exit"))) { + + /* XXX + * This could be done in a more general + * manner but it still wouldn't be very pretty. + */ + if (!strcmp(fsc.name, "freebsd32_execve")) { + if ((trussinfo->flags & EXECVEARGS) == 0) + if (fsc.s_args[1]) { + free(fsc.s_args[1]); + fsc.s_args[1] = NULL; + } + if ((trussinfo->flags & EXECVEENVS) == 0) + if (fsc.s_args[2]) { + free(fsc.s_args[2]); + fsc.s_args[2] = NULL; + } + } + + } + + return; +} + +/* + * And when the system call is done, we handle it here. + * Currently, no attempt is made to ensure that the system calls + * match -- this needs to be fixed (and is, in fact, why S_SCX includes + * the sytem call number instead of, say, an error status). + */ + +long +amd64_fbsd32_syscall_exit(struct trussinfo *trussinfo, int syscall_num __unused) +{ + struct reg regs; + long retval; + int i; + int errorp; + struct syscall *sc; + + if (fsc.name == NULL) + return (-1); + cpid = trussinfo->curthread->tid; + + if (ptrace(PT_GETREGS, cpid, (caddr_t)®s, 0) < 0) + { + fprintf(trussinfo->outfile, "-- CANNOT READ REGISTERS --\n"); + return (-1); + } + + retval = regs.r_rax; + errorp = !!(regs.r_rflags & PSL_C); + + /* + * This code, while simpler than the initial versions I used, could + * stand some significant cleaning. + */ + + sc = fsc.sc; + if (!sc) { + for (i = 0; i < fsc.nargs; i++) + asprintf(&fsc.s_args[i], "0x%lx", fsc.args[i]); + } else { + /* + * Here, we only look for arguments that have OUT masked in -- + * otherwise, they were handled in the syscall_entry function. + */ + for (i = 0; i < sc->nargs; i++) { + char *temp; + if (sc->args[i].type & OUT) { + /* + * If an error occurred, then don't bother getting the data; + * it may not be valid. + */ + if (errorp) + asprintf(&temp, "0x%lx", fsc.args[sc->args[i].offset]); + else + temp = print_arg(&sc->args[i], fsc.args, retval, trussinfo); + fsc.s_args[i] = temp; + } + } + } + + /* + * The pipe syscall returns its fds in two registers and has assembly glue + * to provide the libc API, so it cannot be handled like regular syscalls. + * The nargs check is so we don't have to do yet another strcmp on every + * syscall. + */ + if (!errorp && fsc.nargs == 0 && fsc.name && strcmp(fsc.name, "pipe") == 0) { + fsc.nargs = 1; + fsc.s_args = malloc((1+fsc.nargs) * sizeof(char*)); + asprintf(&fsc.s_args[0], "[%d,%d]", (int)retval, (int)regs.r_rdx); + retval = 0; + } + + if (fsc.name != NULL && + (!strcmp(fsc.name, "freebsd32_execve") || !strcmp(fsc.name, "exit"))) { + trussinfo->curthread->in_syscall = 1; + } + + /* + * It would probably be a good idea to merge the error handling, + * but that complicates things considerably. + */ + + print_syscall_ret(trussinfo, fsc.name, fsc.nargs, fsc.s_args, errorp, retval); + clear_fsc(); + + return (retval); +} diff --git a/usr.bin/truss/amd64-linux32.c b/usr.bin/truss/amd64-linux32.c new file mode 100644 index 0000000000000..163b1417bd649 --- /dev/null +++ b/usr.bin/truss/amd64-linux32.c @@ -0,0 +1,316 @@ +/* + * Copryight 1997 Sean Eric Fagan + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by Sean Eric Fagan + * 4. Neither the name of the author may be used to endorse or promote + * products derived from this software without specific prior written + * permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#ifndef lint +static const char rcsid[] = + "$FreeBSD$"; +#endif /* not lint */ + +/* + * Linux/i386-specific system call handling. Given how much of this code + * is taken from the freebsd equivalent, I can probably put even more of + * it in support routines that can be used by any personality support. + */ + +#include <sys/types.h> +#include <sys/ptrace.h> + +#include <machine/reg.h> +#include <machine/psl.h> + +#include <errno.h> +#include <fcntl.h> +#include <signal.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <time.h> +#include <unistd.h> + +#include "truss.h" +#include "syscall.h" +#include "extern.h" + +static int cpid = -1; + +#include "linux32_syscalls.h" + +static int nsyscalls = + sizeof(linux32_syscallnames) / sizeof(linux32_syscallnames[0]); + +/* + * This is what this particular file uses to keep track of a system call. + * It is probably not quite sufficient -- I can probably use the same + * structure for the various syscall personalities, and I also probably + * need to nest system calls (for signal handlers). + * + * 'struct syscall' describes the system call; it may be NULL, however, + * if we don't know about this particular system call yet. + */ +static struct linux_syscall { + struct syscall *sc; + const char *name; + int number; + unsigned long args[5]; + int nargs; /* number of arguments -- *not* number of words! */ + char **s_args; /* the printable arguments */ +} fsc; + +/* Clear up and free parts of the fsc structure. */ +static __inline void +clear_fsc(void) { + if (fsc.s_args) { + int i; + for (i = 0; i < fsc.nargs; i++) + if (fsc.s_args[i]) + free(fsc.s_args[i]); + free(fsc.s_args); + } + memset(&fsc, 0, sizeof(fsc)); +} + +/* + * Called when a process has entered a system call. nargs is the + * number of words, not number of arguments (a necessary distinction + * in some cases). Note that if the STOPEVENT() code in i386/i386/trap.c + * is ever changed these functions need to keep up. + */ + +void +amd64_linux32_syscall_entry(struct trussinfo *trussinfo, int nargs) { + struct reg regs; + int syscall_num; + int i; + struct syscall *sc; + + cpid = trussinfo->curthread->tid; + + clear_fsc(); + + if (ptrace(PT_GETREGS, cpid, (caddr_t)®s, 0) < 0) + { + fprintf(trussinfo->outfile, "-- CANNOT READ REGISTERS --\n"); + return; + } + syscall_num = regs.r_rax; + + fsc.number = syscall_num; + fsc.name = + (syscall_num < 0 || syscall_num > nsyscalls) ? NULL : linux32_syscallnames[syscall_num]; + if (!fsc.name) { + fprintf(trussinfo->outfile, "-- UNKNOWN SYSCALL %d --\n", syscall_num); + } + + if (fsc.name && (trussinfo->flags & FOLLOWFORKS) + && ((!strcmp(fsc.name, "linux_fork") + || !strcmp(fsc.name, "linux_vfork")))) + { + trussinfo->curthread->in_fork = 1; + } + + if (nargs == 0) + return; + + /* + * Linux passes syscall arguments in registers, not + * on the stack. Fortunately, we've got access to the + * register set. Note that we don't bother checking the + * number of arguments. And what does linux do for syscalls + * that have more than five arguments? + */ + + fsc.args[0] = regs.r_rbx; + fsc.args[1] = regs.r_rcx; + fsc.args[2] = regs.r_rdx; + fsc.args[3] = regs.r_rsi; + fsc.args[4] = regs.r_rdi; + + sc = get_syscall(fsc.name); + if (sc) { + fsc.nargs = sc->nargs; + } else { +#if DEBUG + fprintf(trussinfo->outfile, "unknown syscall %s -- setting args to %d\n", + fsc.name, nargs); +#endif + fsc.nargs = nargs; + } + + fsc.s_args = malloc((1+fsc.nargs) * sizeof(char*)); + memset(fsc.s_args, 0, fsc.nargs * sizeof(char*)); + fsc.sc = sc; + + /* + * At this point, we set up the system call arguments. + * We ignore any OUT ones, however -- those are arguments that + * are set by the system call, and so are probably meaningless + * now. This doesn't currently support arguments that are + * passed in *and* out, however. + */ + + if (fsc.name) { + +#if DEBUG + fprintf(stderr, "syscall %s(", fsc.name); +#endif + for (i = 0; i < fsc.nargs; i++) { +#if DEBUG + fprintf(stderr, "0x%x%s", + sc + ? fsc.args[sc->args[i].offset] + : fsc.args[i], + i < (fsc.nargs - 1) ? "," : ""); +#endif + if (sc && !(sc->args[i].type & OUT)) { + fsc.s_args[i] = print_arg(&sc->args[i], fsc.args, 0, trussinfo); + } + } +#if DEBUG + fprintf(stderr, ")\n"); +#endif + } + +#if DEBUG + fprintf(trussinfo->outfile, "\n"); +#endif + + if (fsc.name != NULL && + (!strcmp(fsc.name, "linux_execve") || !strcmp(fsc.name, "exit"))) { + + /* XXX + * This could be done in a more general + * manner but it still wouldn't be very pretty. + */ + if (!strcmp(fsc.name, "linux_execve")) { + if ((trussinfo->flags & EXECVEARGS) == 0) + if (fsc.s_args[1]) { + free(fsc.s_args[1]); + fsc.s_args[1] = NULL; + } + if ((trussinfo->flags & EXECVEENVS) == 0) + if (fsc.s_args[2]) { + free(fsc.s_args[2]); + fsc.s_args[2] = NULL; + } + } + } + + return; +} + +/* + * Linux syscalls return negative errno's, we do positive and map them + */ +const int bsd_to_linux_errno[] = { + -0, -1, -2, -3, -4, -5, -6, -7, -8, -9, + -10, -35, -12, -13, -14, -15, -16, -17, -18, -19, + -20, -21, -22, -23, -24, -25, -26, -27, -28, -29, + -30, -31, -32, -33, -34, -11,-115,-114, -88, -89, + -90, -91, -92, -93, -94, -95, -96, -97, -98, -99, + -100,-101,-102,-103,-104,-105,-106,-107,-108,-109, + -110,-111, -40, -36,-112,-113, -39, -11, -87,-122, + -116, -66, -6, -6, -6, -6, -6, -37, -38, -9, + -6, +}; + +long +amd64_linux32_syscall_exit(struct trussinfo *trussinfo, int syscall_num __unused) +{ + struct reg regs; + long retval; + int i; + int errorp; + struct syscall *sc; + + if (fsc.name == NULL) + return (-1); + + cpid = trussinfo->curthread->tid; + if (ptrace(PT_GETREGS, cpid, (caddr_t)®s, 0) < 0) + { + fprintf(trussinfo->outfile, "-- CANNOT READ REGISTERS --\n"); + return (-1); + } + + retval = regs.r_rax; + errorp = !!(regs.r_rflags & PSL_C); + + /* + * This code, while simpler than the initial versions I used, could + * stand some significant cleaning. + */ + + sc = fsc.sc; + if (!sc) { + for (i = 0; i < fsc.nargs; i++) + asprintf(&fsc.s_args[i], "0x%lx", fsc.args[i]); + } else { + /* + * Here, we only look for arguments that have OUT masked in -- + * otherwise, they were handled in the syscall_entry function. + */ + for (i = 0; i < sc->nargs; i++) { + char *temp; + if (sc->args[i].type & OUT) { + /* + * If an error occurred, than don't bothe getting the data; + * it may not be valid. + */ + if (errorp) + asprintf(&temp, "0x%lx", fsc.args[sc->args[i].offset]); + else + temp = print_arg(&sc->args[i], fsc.args, retval, trussinfo); + fsc.s_args[i] = temp; + } + } + } + + /* + * It would probably be a good idea to merge the error handling, + * but that complicates things considerably. + */ + if (errorp) { + for (i = 0; (size_t)i < sizeof(bsd_to_linux_errno) / sizeof(int); i++) + if (retval == bsd_to_linux_errno[i]) + break; + } + + if (fsc.name != NULL && + (!strcmp(fsc.name, "linux_execve") || !strcmp(fsc.name, "exit"))) { + trussinfo->curthread->in_syscall = 1; + } + + print_syscall_ret(trussinfo, fsc.name, fsc.nargs, fsc.s_args, errorp, + errorp ? i : retval); + clear_fsc(); + + return (retval); +} diff --git a/usr.bin/truss/amd64linux32.conf b/usr.bin/truss/amd64linux32.conf new file mode 100644 index 0000000000000..7f5e8bd268fef --- /dev/null +++ b/usr.bin/truss/amd64linux32.conf @@ -0,0 +1,13 @@ +# $FreeBSD$ + +sysnames="linux32_syscalls.h" +sysproto="/dev/null" +sysproto_h="/dev/null" +syshdr="/dev/null" +sysmk="/dev/null" +syssw="/dev/null" +syshide="/dev/null" +syscallprefix="SYS_" +switchname="sysent" +namesname="linux32_syscallnames" +systrace="/dev/null" diff --git a/usr.bin/truss/fbsd32.conf b/usr.bin/truss/fbsd32.conf new file mode 100644 index 0000000000000..3323f115ee18c --- /dev/null +++ b/usr.bin/truss/fbsd32.conf @@ -0,0 +1,13 @@ +# $FreeBSD$ + +sysnames="freebsd32_syscalls.h" +sysproto="/dev/null" +sysproto_h="/dev/null" +syshdr="/dev/null" +sysmk="/dev/null" +syssw="/dev/null" +syshide="/dev/null" +syscallprefix="SYS_" +switchname="sysent" +namesname="freebsd32_syscallnames" +systrace="/dev/null" |