| /* |
| * Copyright (c) 1991, 1992 Paul Kranenburg <pk@cs.few.eur.nl> |
| * Copyright (c) 1993 Branko Lankester <branko@hacktic.nl> |
| * Copyright (c) 1993, 1994, 1995, 1996 Rick Sladkey <jrs@world.std.com> |
| * Copyright (c) 1996-1999 Wichert Akkerman <wichert@cistron.nl> |
| * Copyright (c) 1999 IBM Deutschland Entwicklung GmbH, IBM Corporation |
| * Linux for s390 port by D.J. Barrow |
| * <barrow_dj@mail.yahoo.com,djbarrow@de.ibm.com> |
| * All rights reserved. |
| * |
| * 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. The name of the author may not be used to endorse or promote products |
| * derived from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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. |
| * |
| * $Id$ |
| */ |
| |
| #include "defs.h" |
| |
| #include <sys/user.h> |
| #include <sys/param.h> |
| |
| #ifdef HAVE_SYS_REG_H |
| # include <sys/reg.h> |
| # ifndef PTRACE_PEEKUSR |
| # define PTRACE_PEEKUSR PTRACE_PEEKUSER |
| # endif |
| #elif defined(HAVE_LINUX_PTRACE_H) |
| # undef PTRACE_SYSCALL |
| # ifdef HAVE_STRUCT_IA64_FPREG |
| # define ia64_fpreg XXX_ia64_fpreg |
| # endif |
| # ifdef HAVE_STRUCT_PT_ALL_USER_REGS |
| # define pt_all_user_regs XXX_pt_all_user_regs |
| # endif |
| # include <linux/ptrace.h> |
| # undef ia64_fpreg |
| # undef pt_all_user_regs |
| #endif |
| |
| #if defined(SPARC64) |
| # undef PTRACE_GETREGS |
| # define PTRACE_GETREGS PTRACE_GETREGS64 |
| # undef PTRACE_SETREGS |
| # define PTRACE_SETREGS PTRACE_SETREGS64 |
| #endif |
| |
| #if defined(IA64) |
| # include <asm/ptrace_offsets.h> |
| # include <asm/rse.h> |
| #endif |
| |
| #ifndef ERESTARTSYS |
| # define ERESTARTSYS 512 |
| #endif |
| # ifndef ERESTARTNOINTR |
| # define ERESTARTNOINTR 513 |
| #endif |
| # ifndef ERESTARTNOHAND |
| # define ERESTARTNOHAND 514 /* restart if no handler.. */ |
| #endif |
| # ifndef ENOIOCTLCMD |
| # define ENOIOCTLCMD 515 /* No ioctl command */ |
| #endif |
| # ifndef ERESTART_RESTARTBLOCK |
| # define ERESTART_RESTARTBLOCK 516 /* restart by calling sys_restart_syscall */ |
| #endif |
| |
| #ifndef NSIG |
| # warning: NSIG is not defined, using 32 |
| # define NSIG 32 |
| #endif |
| #ifdef ARM |
| /* Ugh. Is this really correct? ARM has no RT signals?! */ |
| # undef NSIG |
| # define NSIG 32 |
| #endif |
| |
| #include "syscall.h" |
| |
| /* Define these shorthand notations to simplify the syscallent files. */ |
| #define TD TRACE_DESC |
| #define TF TRACE_FILE |
| #define TI TRACE_IPC |
| #define TN TRACE_NETWORK |
| #define TP TRACE_PROCESS |
| #define TS TRACE_SIGNAL |
| #define NF SYSCALL_NEVER_FAILS |
| #define MA MAX_ARGS |
| |
| static const struct sysent sysent0[] = { |
| #include "syscallent.h" |
| }; |
| |
| #if SUPPORTED_PERSONALITIES >= 2 |
| static const struct sysent sysent1[] = { |
| # include "syscallent1.h" |
| }; |
| #endif |
| |
| #if SUPPORTED_PERSONALITIES >= 3 |
| static const struct sysent sysent2[] = { |
| # include "syscallent2.h" |
| }; |
| #endif |
| |
| /* Now undef them since short defines cause wicked namespace pollution. */ |
| #undef TD |
| #undef TF |
| #undef TI |
| #undef TN |
| #undef TP |
| #undef TS |
| #undef NF |
| #undef MA |
| |
| /* |
| * `ioctlent.h' may be generated from `ioctlent.raw' by the auxiliary |
| * program `ioctlsort', such that the list is sorted by the `code' field. |
| * This has the side-effect of resolving the _IO.. macros into |
| * plain integers, eliminating the need to include here everything |
| * in "/usr/include". |
| */ |
| |
| static const char *const errnoent0[] = { |
| #include "errnoent.h" |
| }; |
| static const char *const signalent0[] = { |
| #include "signalent.h" |
| }; |
| static const struct ioctlent ioctlent0[] = { |
| #include "ioctlent.h" |
| }; |
| enum { nsyscalls0 = ARRAY_SIZE(sysent0) }; |
| enum { nerrnos0 = ARRAY_SIZE(errnoent0) }; |
| enum { nsignals0 = ARRAY_SIZE(signalent0) }; |
| enum { nioctlents0 = ARRAY_SIZE(ioctlent0) }; |
| int qual_flags0[MAX_QUALS]; |
| |
| #if SUPPORTED_PERSONALITIES >= 2 |
| static const char *const errnoent1[] = { |
| # include "errnoent1.h" |
| }; |
| static const char *const signalent1[] = { |
| # include "signalent1.h" |
| }; |
| static const struct ioctlent ioctlent1[] = { |
| # include "ioctlent1.h" |
| }; |
| enum { nsyscalls1 = ARRAY_SIZE(sysent1) }; |
| enum { nerrnos1 = ARRAY_SIZE(errnoent1) }; |
| enum { nsignals1 = ARRAY_SIZE(signalent1) }; |
| enum { nioctlents1 = ARRAY_SIZE(ioctlent1) }; |
| int qual_flags1[MAX_QUALS]; |
| #endif |
| |
| #if SUPPORTED_PERSONALITIES >= 3 |
| static const char *const errnoent2[] = { |
| # include "errnoent2.h" |
| }; |
| static const char *const signalent2[] = { |
| # include "signalent2.h" |
| }; |
| static const struct ioctlent ioctlent2[] = { |
| # include "ioctlent2.h" |
| }; |
| enum { nsyscalls2 = ARRAY_SIZE(sysent2) }; |
| enum { nerrnos2 = ARRAY_SIZE(errnoent2) }; |
| enum { nsignals2 = ARRAY_SIZE(signalent2) }; |
| enum { nioctlents2 = ARRAY_SIZE(ioctlent2) }; |
| int qual_flags2[MAX_QUALS]; |
| #endif |
| |
| const struct sysent *sysent; |
| const char *const *errnoent; |
| const char *const *signalent; |
| const struct ioctlent *ioctlent; |
| unsigned nsyscalls; |
| unsigned nerrnos; |
| unsigned nsignals; |
| unsigned nioctlents; |
| int *qual_flags; |
| |
| int current_personality; |
| |
| #ifndef PERSONALITY0_WORDSIZE |
| # define PERSONALITY0_WORDSIZE sizeof(long) |
| #endif |
| const int personality_wordsize[SUPPORTED_PERSONALITIES] = { |
| PERSONALITY0_WORDSIZE, |
| #if SUPPORTED_PERSONALITIES > 1 |
| PERSONALITY1_WORDSIZE, |
| #endif |
| #if SUPPORTED_PERSONALITIES > 2 |
| PERSONALITY2_WORDSIZE, |
| #endif |
| }; |
| |
| void |
| set_personality(int personality) |
| { |
| switch (personality) { |
| case 0: |
| errnoent = errnoent0; |
| nerrnos = nerrnos0; |
| sysent = sysent0; |
| nsyscalls = nsyscalls0; |
| ioctlent = ioctlent0; |
| nioctlents = nioctlents0; |
| signalent = signalent0; |
| nsignals = nsignals0; |
| qual_flags = qual_flags0; |
| break; |
| |
| #if SUPPORTED_PERSONALITIES >= 2 |
| case 1: |
| errnoent = errnoent1; |
| nerrnos = nerrnos1; |
| sysent = sysent1; |
| nsyscalls = nsyscalls1; |
| ioctlent = ioctlent1; |
| nioctlents = nioctlents1; |
| signalent = signalent1; |
| nsignals = nsignals1; |
| qual_flags = qual_flags1; |
| break; |
| #endif |
| |
| #if SUPPORTED_PERSONALITIES >= 3 |
| case 2: |
| errnoent = errnoent2; |
| nerrnos = nerrnos2; |
| sysent = sysent2; |
| nsyscalls = nsyscalls2; |
| ioctlent = ioctlent2; |
| nioctlents = nioctlents2; |
| signalent = signalent2; |
| nsignals = nsignals2; |
| qual_flags = qual_flags2; |
| break; |
| #endif |
| } |
| |
| current_personality = personality; |
| } |
| |
| #if SUPPORTED_PERSONALITIES > 1 |
| static void |
| update_personality(struct tcb *tcp, int personality) |
| { |
| if (personality == current_personality) |
| return; |
| set_personality(personality); |
| |
| if (personality == tcp->currpers) |
| return; |
| tcp->currpers = personality; |
| |
| # if defined(POWERPC64) || defined(X86_64) |
| if (!qflag) { |
| static const char *const names[] = {"64 bit", "32 bit"}; |
| fprintf(stderr, "[ Process PID=%d runs in %s mode. ]\n", |
| tcp->pid, names[personality]); |
| } |
| # endif |
| } |
| #endif |
| |
| static int qual_syscall(), qual_signal(), qual_fault(), qual_desc(); |
| |
| static const struct qual_options { |
| int bitflag; |
| const char *option_name; |
| int (*qualify)(const char *, int, int); |
| const char *argument_name; |
| } qual_options[] = { |
| { QUAL_TRACE, "trace", qual_syscall, "system call" }, |
| { QUAL_TRACE, "t", qual_syscall, "system call" }, |
| { QUAL_ABBREV, "abbrev", qual_syscall, "system call" }, |
| { QUAL_ABBREV, "a", qual_syscall, "system call" }, |
| { QUAL_VERBOSE, "verbose", qual_syscall, "system call" }, |
| { QUAL_VERBOSE, "v", qual_syscall, "system call" }, |
| { QUAL_RAW, "raw", qual_syscall, "system call" }, |
| { QUAL_RAW, "x", qual_syscall, "system call" }, |
| { QUAL_SIGNAL, "signal", qual_signal, "signal" }, |
| { QUAL_SIGNAL, "signals", qual_signal, "signal" }, |
| { QUAL_SIGNAL, "s", qual_signal, "signal" }, |
| { QUAL_FAULT, "fault", qual_fault, "fault" }, |
| { QUAL_FAULT, "faults", qual_fault, "fault" }, |
| { QUAL_FAULT, "m", qual_fault, "fault" }, |
| { QUAL_READ, "read", qual_desc, "descriptor" }, |
| { QUAL_READ, "reads", qual_desc, "descriptor" }, |
| { QUAL_READ, "r", qual_desc, "descriptor" }, |
| { QUAL_WRITE, "write", qual_desc, "descriptor" }, |
| { QUAL_WRITE, "writes", qual_desc, "descriptor" }, |
| { QUAL_WRITE, "w", qual_desc, "descriptor" }, |
| { 0, NULL, NULL, NULL }, |
| }; |
| |
| static void |
| qualify_one(int n, int bitflag, int not, int pers) |
| { |
| if (pers == 0 || pers < 0) { |
| if (not) |
| qual_flags0[n] &= ~bitflag; |
| else |
| qual_flags0[n] |= bitflag; |
| } |
| |
| #if SUPPORTED_PERSONALITIES >= 2 |
| if (pers == 1 || pers < 0) { |
| if (not) |
| qual_flags1[n] &= ~bitflag; |
| else |
| qual_flags1[n] |= bitflag; |
| } |
| #endif |
| |
| #if SUPPORTED_PERSONALITIES >= 3 |
| if (pers == 2 || pers < 0) { |
| if (not) |
| qual_flags2[n] &= ~bitflag; |
| else |
| qual_flags2[n] |= bitflag; |
| } |
| #endif |
| } |
| |
| static int |
| qual_syscall(const char *s, int bitflag, int not) |
| { |
| int i; |
| int rc = -1; |
| |
| if (isdigit((unsigned char)*s)) { |
| int i = atoi(s); |
| if (i < 0 || i >= MAX_QUALS) |
| return -1; |
| qualify_one(i, bitflag, not, -1); |
| return 0; |
| } |
| for (i = 0; i < nsyscalls0; i++) |
| if (strcmp(s, sysent0[i].sys_name) == 0) { |
| qualify_one(i, bitflag, not, 0); |
| rc = 0; |
| } |
| |
| #if SUPPORTED_PERSONALITIES >= 2 |
| for (i = 0; i < nsyscalls1; i++) |
| if (strcmp(s, sysent1[i].sys_name) == 0) { |
| qualify_one(i, bitflag, not, 1); |
| rc = 0; |
| } |
| #endif |
| |
| #if SUPPORTED_PERSONALITIES >= 3 |
| for (i = 0; i < nsyscalls2; i++) |
| if (strcmp(s, sysent2[i].sys_name) == 0) { |
| qualify_one(i, bitflag, not, 2); |
| rc = 0; |
| } |
| #endif |
| |
| return rc; |
| } |
| |
| static int |
| qual_signal(const char *s, int bitflag, int not) |
| { |
| int i; |
| char buf[32]; |
| |
| if (isdigit((unsigned char)*s)) { |
| int signo = atoi(s); |
| if (signo < 0 || signo >= MAX_QUALS) |
| return -1; |
| qualify_one(signo, bitflag, not, -1); |
| return 0; |
| } |
| if (strlen(s) >= sizeof buf) |
| return -1; |
| strcpy(buf, s); |
| s = buf; |
| if (strncasecmp(s, "SIG", 3) == 0) |
| s += 3; |
| for (i = 0; i <= NSIG; i++) |
| if (strcasecmp(s, signame(i) + 3) == 0) { |
| qualify_one(i, bitflag, not, -1); |
| return 0; |
| } |
| return -1; |
| } |
| |
| static int |
| qual_fault(const char *s, int bitflag, int not) |
| { |
| return -1; |
| } |
| |
| static int |
| qual_desc(const char *s, int bitflag, int not) |
| { |
| if (isdigit((unsigned char)*s)) { |
| int desc = atoi(s); |
| if (desc < 0 || desc >= MAX_QUALS) |
| return -1; |
| qualify_one(desc, bitflag, not, -1); |
| return 0; |
| } |
| return -1; |
| } |
| |
| static int |
| lookup_class(const char *s) |
| { |
| if (strcmp(s, "file") == 0) |
| return TRACE_FILE; |
| if (strcmp(s, "ipc") == 0) |
| return TRACE_IPC; |
| if (strcmp(s, "network") == 0) |
| return TRACE_NETWORK; |
| if (strcmp(s, "process") == 0) |
| return TRACE_PROCESS; |
| if (strcmp(s, "signal") == 0) |
| return TRACE_SIGNAL; |
| if (strcmp(s, "desc") == 0) |
| return TRACE_DESC; |
| return -1; |
| } |
| |
| void |
| qualify(const char *s) |
| { |
| const struct qual_options *opt; |
| int not; |
| char *copy; |
| const char *p; |
| int i, n; |
| |
| opt = &qual_options[0]; |
| for (i = 0; (p = qual_options[i].option_name); i++) { |
| n = strlen(p); |
| if (strncmp(s, p, n) == 0 && s[n] == '=') { |
| opt = &qual_options[i]; |
| s += n + 1; |
| break; |
| } |
| } |
| not = 0; |
| if (*s == '!') { |
| not = 1; |
| s++; |
| } |
| if (strcmp(s, "none") == 0) { |
| not = 1 - not; |
| s = "all"; |
| } |
| if (strcmp(s, "all") == 0) { |
| for (i = 0; i < MAX_QUALS; i++) { |
| qualify_one(i, opt->bitflag, not, -1); |
| } |
| return; |
| } |
| for (i = 0; i < MAX_QUALS; i++) { |
| qualify_one(i, opt->bitflag, !not, -1); |
| } |
| copy = strdup(s); |
| if (!copy) |
| die_out_of_memory(); |
| for (p = strtok(copy, ","); p; p = strtok(NULL, ",")) { |
| if (opt->bitflag == QUAL_TRACE && (n = lookup_class(p)) > 0) { |
| for (i = 0; i < nsyscalls0; i++) |
| if (sysent0[i].sys_flags & n) |
| qualify_one(i, opt->bitflag, not, 0); |
| |
| #if SUPPORTED_PERSONALITIES >= 2 |
| for (i = 0; i < nsyscalls1; i++) |
| if (sysent1[i].sys_flags & n) |
| qualify_one(i, opt->bitflag, not, 1); |
| #endif |
| |
| #if SUPPORTED_PERSONALITIES >= 3 |
| for (i = 0; i < nsyscalls2; i++) |
| if (sysent2[i].sys_flags & n) |
| qualify_one(i, opt->bitflag, not, 2); |
| #endif |
| |
| continue; |
| } |
| if (opt->qualify(p, opt->bitflag, not)) { |
| error_msg_and_die("invalid %s '%s'", |
| opt->argument_name, p); |
| } |
| } |
| free(copy); |
| return; |
| } |
| |
| enum subcall_style { shift_style, deref_style, mask_style, door_style }; |
| |
| #if !(defined(ALPHA) || defined(MIPS) || defined(__ARM_EABI__)) |
| |
| static void |
| decode_subcall(struct tcb *tcp, int subcall, int nsubcalls, enum subcall_style style) |
| { |
| unsigned long addr, mask; |
| int i, n; |
| int size = personality_wordsize[current_personality]; |
| |
| switch (style) { |
| case shift_style: |
| if (tcp->u_arg[0] < 0 || tcp->u_arg[0] >= nsubcalls) |
| return; |
| tcp->scno = subcall + tcp->u_arg[0]; |
| tcp->u_nargs = n = sysent[tcp->scno].nargs; |
| for (i = 0; i < n; i++) |
| tcp->u_arg[i] = tcp->u_arg[i + 1]; |
| break; |
| case deref_style: |
| if (tcp->u_arg[0] < 0 || tcp->u_arg[0] >= nsubcalls) |
| return; |
| tcp->scno = subcall + tcp->u_arg[0]; |
| addr = tcp->u_arg[1]; |
| tcp->u_nargs = n = sysent[tcp->scno].nargs; |
| for (i = 0; i < n; i++) { |
| if (size == sizeof(int)) { |
| unsigned int arg; |
| if (umove(tcp, addr, &arg) < 0) |
| arg = 0; |
| tcp->u_arg[i] = arg; |
| } |
| else if (size == sizeof(long)) { |
| unsigned long arg; |
| if (umove(tcp, addr, &arg) < 0) |
| arg = 0; |
| tcp->u_arg[i] = arg; |
| } |
| else |
| abort(); |
| addr += size; |
| } |
| break; |
| case mask_style: |
| mask = (tcp->u_arg[0] >> 8) & 0xff; |
| for (i = 0; mask; i++) |
| mask >>= 1; |
| if (i >= nsubcalls) |
| return; |
| tcp->u_arg[0] &= 0xff; |
| tcp->scno = subcall + i; |
| tcp->u_nargs = sysent[tcp->scno].nargs; |
| break; |
| case door_style: |
| /* |
| * Oh, yuck. The call code is the *sixth* argument. |
| * (don't you mean the *last* argument? - JH) |
| */ |
| if (tcp->u_arg[5] < 0 || tcp->u_arg[5] >= nsubcalls) |
| return; |
| tcp->scno = subcall + tcp->u_arg[5]; |
| tcp->u_nargs = sysent[tcp->scno].nargs; |
| break; |
| } |
| } |
| #endif |
| |
| int |
| printargs(struct tcb *tcp) |
| { |
| if (entering(tcp)) { |
| int i; |
| |
| for (i = 0; i < tcp->u_nargs; i++) |
| tprintf("%s%#lx", i ? ", " : "", tcp->u_arg[i]); |
| } |
| return 0; |
| } |
| |
| int |
| printargs_lu(struct tcb *tcp) |
| { |
| if (entering(tcp)) { |
| int i; |
| |
| for (i = 0; i < tcp->u_nargs; i++) |
| tprintf("%s%lu", i ? ", " : "", tcp->u_arg[i]); |
| } |
| return 0; |
| } |
| |
| int |
| printargs_ld(struct tcb *tcp) |
| { |
| if (entering(tcp)) { |
| int i; |
| |
| for (i = 0; i < tcp->u_nargs; i++) |
| tprintf("%s%ld", i ? ", " : "", tcp->u_arg[i]); |
| } |
| return 0; |
| } |
| |
| long |
| getrval2(struct tcb *tcp) |
| { |
| long val = -1; |
| |
| #if defined(SPARC) || defined(SPARC64) |
| struct pt_regs regs; |
| if (ptrace(PTRACE_GETREGS, tcp->pid, (char *)®s, 0) < 0) |
| return -1; |
| val = regs.u_regs[U_REG_O1]; |
| #elif defined(SH) |
| if (upeek(tcp, 4*(REG_REG0+1), &val) < 0) |
| return -1; |
| #elif defined(IA64) |
| if (upeek(tcp, PT_R9, &val) < 0) |
| return -1; |
| #endif |
| |
| return val; |
| } |
| |
| int |
| is_restart_error(struct tcb *tcp) |
| { |
| switch (tcp->u_error) { |
| case ERESTARTSYS: |
| case ERESTARTNOINTR: |
| case ERESTARTNOHAND: |
| case ERESTART_RESTARTBLOCK: |
| return 1; |
| default: |
| break; |
| } |
| return 0; |
| } |
| |
| #if defined(I386) |
| struct pt_regs i386_regs; |
| #elif defined(X86_64) |
| /* |
| * On 32 bits, pt_regs and user_regs_struct are the same, |
| * but on 64 bits, user_regs_struct has six more fields: |
| * fs_base, gs_base, ds, es, fs, gs. |
| * PTRACE_GETREGS fills them too, so struct pt_regs would overflow. |
| */ |
| static struct user_regs_struct x86_64_regs; |
| #elif defined(IA64) |
| long r8, r10, psr; /* TODO: make static? */ |
| long ia32 = 0; /* not static */ |
| #elif defined(POWERPC) |
| static long result; |
| #elif defined(M68K) |
| static long d0; |
| #elif defined(BFIN) |
| static long r0; |
| #elif defined(ARM) |
| static struct pt_regs regs; |
| #elif defined(ALPHA) |
| static long r0; |
| static long a3; |
| #elif defined(AVR32) |
| static struct pt_regs regs; |
| #elif defined(SPARC) || defined(SPARC64) |
| static struct pt_regs regs; |
| static unsigned long trap; |
| #elif defined(LINUX_MIPSN32) |
| static long long a3; |
| static long long r2; |
| #elif defined(MIPS) |
| static long a3; |
| static long r2; |
| #elif defined(S390) || defined(S390X) |
| static long gpr2; |
| static long pc; |
| static long syscall_mode; |
| #elif defined(HPPA) |
| static long r28; |
| #elif defined(SH) |
| static long r0; |
| #elif defined(SH64) |
| static long r9; |
| #elif defined(CRISV10) || defined(CRISV32) |
| static long r10; |
| #elif defined(MICROBLAZE) |
| static long r3; |
| #endif |
| |
| /* Returns: |
| * 0: "ignore this ptrace stop", bail out of trace_syscall() silently. |
| * 1: ok, continue in trace_syscall(). |
| * other: error, trace_syscall() should print error indicator |
| * ("????" etc) and bail out. |
| */ |
| static |
| int |
| get_scno(struct tcb *tcp) |
| { |
| long scno = 0; |
| |
| #if defined(S390) || defined(S390X) |
| if (upeek(tcp, PT_GPR2, &syscall_mode) < 0) |
| return -1; |
| |
| if (syscall_mode != -ENOSYS) { |
| /* |
| * Since kernel version 2.5.44 the scno gets passed in gpr2. |
| */ |
| scno = syscall_mode; |
| } else { |
| /* |
| * Old style of "passing" the scno via the SVC instruction. |
| */ |
| long opcode, offset_reg, tmp; |
| void *svc_addr; |
| static const int gpr_offset[16] = { |
| PT_GPR0, PT_GPR1, PT_ORIGGPR2, PT_GPR3, |
| PT_GPR4, PT_GPR5, PT_GPR6, PT_GPR7, |
| PT_GPR8, PT_GPR9, PT_GPR10, PT_GPR11, |
| PT_GPR12, PT_GPR13, PT_GPR14, PT_GPR15 |
| }; |
| |
| if (upeek(tcp, PT_PSWADDR, &pc) < 0) |
| return -1; |
| errno = 0; |
| opcode = ptrace(PTRACE_PEEKTEXT, tcp->pid, (char *)(pc-sizeof(long)), 0); |
| if (errno) { |
| perror("peektext(pc-oneword)"); |
| return -1; |
| } |
| |
| /* |
| * We have to check if the SVC got executed directly or via an |
| * EXECUTE instruction. In case of EXECUTE it is necessary to do |
| * instruction decoding to derive the system call number. |
| * Unfortunately the opcode sizes of EXECUTE and SVC are differently, |
| * so that this doesn't work if a SVC opcode is part of an EXECUTE |
| * opcode. Since there is no way to find out the opcode size this |
| * is the best we can do... |
| */ |
| if ((opcode & 0xff00) == 0x0a00) { |
| /* SVC opcode */ |
| scno = opcode & 0xff; |
| } |
| else { |
| /* SVC got executed by EXECUTE instruction */ |
| |
| /* |
| * Do instruction decoding of EXECUTE. If you really want to |
| * understand this, read the Principles of Operations. |
| */ |
| svc_addr = (void *) (opcode & 0xfff); |
| |
| tmp = 0; |
| offset_reg = (opcode & 0x000f0000) >> 16; |
| if (offset_reg && (upeek(tcp, gpr_offset[offset_reg], &tmp) < 0)) |
| return -1; |
| svc_addr += tmp; |
| |
| tmp = 0; |
| offset_reg = (opcode & 0x0000f000) >> 12; |
| if (offset_reg && (upeek(tcp, gpr_offset[offset_reg], &tmp) < 0)) |
| return -1; |
| svc_addr += tmp; |
| |
| scno = ptrace(PTRACE_PEEKTEXT, tcp->pid, svc_addr, 0); |
| if (errno) |
| return -1; |
| # if defined(S390X) |
| scno >>= 48; |
| # else |
| scno >>= 16; |
| # endif |
| tmp = 0; |
| offset_reg = (opcode & 0x00f00000) >> 20; |
| if (offset_reg && (upeek(tcp, gpr_offset[offset_reg], &tmp) < 0)) |
| return -1; |
| |
| scno = (scno | tmp) & 0xff; |
| } |
| } |
| #elif defined(POWERPC) |
| if (upeek(tcp, sizeof(unsigned long)*PT_R0, &scno) < 0) |
| return -1; |
| # ifdef POWERPC64 |
| /* TODO: speed up strace by not doing this at every syscall. |
| * We only need to do it after execve. |
| */ |
| int currpers; |
| long val; |
| |
| /* Check for 64/32 bit mode. */ |
| if (upeek(tcp, sizeof(unsigned long)*PT_MSR, &val) < 0) |
| return -1; |
| /* SF is bit 0 of MSR */ |
| if (val < 0) |
| currpers = 0; |
| else |
| currpers = 1; |
| update_personality(tcp, currpers); |
| # endif |
| #elif defined(AVR32) |
| /* Read complete register set in one go. */ |
| if (ptrace(PTRACE_GETREGS, tcp->pid, NULL, ®s) < 0) |
| return -1; |
| scno = regs.r8; |
| #elif defined(BFIN) |
| if (upeek(tcp, PT_ORIG_P0, &scno)) |
| return -1; |
| #elif defined(I386) |
| if (ptrace(PTRACE_GETREGS, tcp->pid, NULL, (long) &i386_regs) < 0) |
| return -1; |
| scno = i386_regs.orig_eax; |
| #elif defined(X86_64) |
| int currpers; |
| if (ptrace(PTRACE_GETREGS, tcp->pid, NULL, (long) &x86_64_regs) < 0) |
| return -1; |
| scno = x86_64_regs.orig_rax; |
| |
| /* Check CS register value. On x86-64 linux it is: |
| * 0x33 for long mode (64 bit) |
| * 0x23 for compatibility mode (32 bit) |
| */ |
| switch (x86_64_regs.cs) { |
| case 0x23: currpers = 1; break; |
| case 0x33: currpers = 0; break; |
| default: |
| fprintf(stderr, "Unknown value CS=0x%08X while " |
| "detecting personality of process " |
| "PID=%d\n", (int)x86_64_regs.cs, tcp->pid); |
| currpers = current_personality; |
| break; |
| } |
| # if 0 |
| /* This version analyzes the opcode of a syscall instruction. |
| * (int 0x80 on i386 vs. syscall on x86-64) |
| * It works, but is too complicated. |
| */ |
| unsigned long val, rip, i; |
| |
| rip = x86_64_regs.rip; |
| |
| /* sizeof(syscall) == sizeof(int 0x80) == 2 */ |
| rip -= 2; |
| errno = 0; |
| |
| call = ptrace(PTRACE_PEEKTEXT, tcp->pid, (char *)rip, (char *)0); |
| if (errno) |
| fprintf(stderr, "ptrace_peektext failed: %s\n", |
| strerror(errno)); |
| switch (call & 0xffff) { |
| /* x86-64: syscall = 0x0f 0x05 */ |
| case 0x050f: currpers = 0; break; |
| /* i386: int 0x80 = 0xcd 0x80 */ |
| case 0x80cd: currpers = 1; break; |
| default: |
| currpers = current_personality; |
| fprintf(stderr, |
| "Unknown syscall opcode (0x%04X) while " |
| "detecting personality of process " |
| "PID=%d\n", (int)call, tcp->pid); |
| break; |
| } |
| # endif |
| update_personality(tcp, currpers); |
| #elif defined(IA64) |
| # define IA64_PSR_IS ((long)1 << 34) |
| if (upeek(tcp, PT_CR_IPSR, &psr) >= 0) |
| ia32 = (psr & IA64_PSR_IS) != 0; |
| if (ia32) { |
| if (upeek(tcp, PT_R1, &scno) < 0) |
| return -1; |
| } else { |
| if (upeek(tcp, PT_R15, &scno) < 0) |
| return -1; |
| } |
| #elif defined(ARM) |
| /* Read complete register set in one go. */ |
| if (ptrace(PTRACE_GETREGS, tcp->pid, NULL, (void *)®s) == -1) |
| return -1; |
| |
| /* |
| * We only need to grab the syscall number on syscall entry. |
| */ |
| if (regs.ARM_ip == 0) { |
| /* |
| * Note: we only deal with only 32-bit CPUs here. |
| */ |
| if (regs.ARM_cpsr & 0x20) { |
| /* |
| * Get the Thumb-mode system call number |
| */ |
| scno = regs.ARM_r7; |
| } else { |
| /* |
| * Get the ARM-mode system call number |
| */ |
| errno = 0; |
| scno = ptrace(PTRACE_PEEKTEXT, tcp->pid, (void *)(regs.ARM_pc - 4), NULL); |
| if (errno) |
| return -1; |
| |
| /* Handle the EABI syscall convention. We do not |
| bother converting structures between the two |
| ABIs, but basic functionality should work even |
| if strace and the traced program have different |
| ABIs. */ |
| if (scno == 0xef000000) { |
| scno = regs.ARM_r7; |
| } else { |
| if ((scno & 0x0ff00000) != 0x0f900000) { |
| fprintf(stderr, "syscall: unknown syscall trap 0x%08lx\n", |
| scno); |
| return -1; |
| } |
| |
| /* |
| * Fixup the syscall number |
| */ |
| scno &= 0x000fffff; |
| } |
| } |
| if (scno & 0x0f0000) { |
| /* |
| * Handle ARM specific syscall |
| */ |
| update_personality(tcp, 1); |
| scno &= 0x0000ffff; |
| } else |
| update_personality(tcp, 0); |
| |
| } else { |
| fprintf(stderr, "pid %d stray syscall entry\n", tcp->pid); |
| tcp->flags |= TCB_INSYSCALL; |
| } |
| #elif defined(M68K) |
| if (upeek(tcp, 4*PT_ORIG_D0, &scno) < 0) |
| return -1; |
| #elif defined(LINUX_MIPSN32) |
| unsigned long long regs[38]; |
| |
| if (ptrace(PTRACE_GETREGS, tcp->pid, NULL, (long) ®s) < 0) |
| return -1; |
| a3 = regs[REG_A3]; |
| r2 = regs[REG_V0]; |
| |
| scno = r2; |
| if (!SCNO_IN_RANGE(scno)) { |
| if (a3 == 0 || a3 == -1) { |
| if (debug_flag) |
| fprintf(stderr, "stray syscall exit: v0 = %ld\n", scno); |
| return 0; |
| } |
| } |
| #elif defined(MIPS) |
| if (upeek(tcp, REG_A3, &a3) < 0) |
| return -1; |
| if (upeek(tcp, REG_V0, &scno) < 0) |
| return -1; |
| |
| if (!SCNO_IN_RANGE(scno)) { |
| if (a3 == 0 || a3 == -1) { |
| if (debug_flag) |
| fprintf(stderr, "stray syscall exit: v0 = %ld\n", scno); |
| return 0; |
| } |
| } |
| #elif defined(ALPHA) |
| if (upeek(tcp, REG_A3, &a3) < 0) |
| return -1; |
| if (upeek(tcp, REG_R0, &scno) < 0) |
| return -1; |
| |
| /* |
| * Do some sanity checks to figure out if it's |
| * really a syscall entry |
| */ |
| if (!SCNO_IN_RANGE(scno)) { |
| if (a3 == 0 || a3 == -1) { |
| if (debug_flag) |
| fprintf(stderr, "stray syscall exit: r0 = %ld\n", scno); |
| return 0; |
| } |
| } |
| #elif defined(SPARC) || defined(SPARC64) |
| /* Everything we need is in the current register set. */ |
| if (ptrace(PTRACE_GETREGS, tcp->pid, (char *)®s, 0) < 0) |
| return -1; |
| |
| /* Disassemble the syscall trap. */ |
| /* Retrieve the syscall trap instruction. */ |
| errno = 0; |
| # if defined(SPARC64) |
| trap = ptrace(PTRACE_PEEKTEXT, tcp->pid, (char *)regs.tpc, 0); |
| trap >>= 32; |
| # else |
| trap = ptrace(PTRACE_PEEKTEXT, tcp->pid, (char *)regs.pc, 0); |
| # endif |
| if (errno) |
| return -1; |
| |
| /* Disassemble the trap to see what personality to use. */ |
| switch (trap) { |
| case 0x91d02010: |
| /* Linux/SPARC syscall trap. */ |
| update_personality(tcp, 0); |
| break; |
| case 0x91d0206d: |
| /* Linux/SPARC64 syscall trap. */ |
| update_personality(tcp, 2); |
| break; |
| case 0x91d02000: |
| /* SunOS syscall trap. (pers 1) */ |
| fprintf(stderr, "syscall: SunOS no support\n"); |
| return -1; |
| case 0x91d02008: |
| /* Solaris 2.x syscall trap. (per 2) */ |
| update_personality(tcp, 1); |
| break; |
| case 0x91d02009: |
| /* NetBSD/FreeBSD syscall trap. */ |
| fprintf(stderr, "syscall: NetBSD/FreeBSD not supported\n"); |
| return -1; |
| case 0x91d02027: |
| /* Solaris 2.x gettimeofday */ |
| update_personality(tcp, 1); |
| break; |
| default: |
| # if defined(SPARC64) |
| fprintf(stderr, "syscall: unknown syscall trap %08lx %016lx\n", trap, regs.tpc); |
| # else |
| fprintf(stderr, "syscall: unknown syscall trap %08lx %08lx\n", trap, regs.pc); |
| # endif |
| return -1; |
| } |
| |
| /* Extract the system call number from the registers. */ |
| if (trap == 0x91d02027) |
| scno = 156; |
| else |
| scno = regs.u_regs[U_REG_G1]; |
| if (scno == 0) { |
| scno = regs.u_regs[U_REG_O0]; |
| memmove(®s.u_regs[U_REG_O0], ®s.u_regs[U_REG_O1], 7*sizeof(regs.u_regs[0])); |
| } |
| #elif defined(HPPA) |
| if (upeek(tcp, PT_GR20, &scno) < 0) |
| return -1; |
| #elif defined(SH) |
| /* |
| * In the new syscall ABI, the system call number is in R3. |
| */ |
| if (upeek(tcp, 4*(REG_REG0+3), &scno) < 0) |
| return -1; |
| |
| if (scno < 0) { |
| /* Odd as it may seem, a glibc bug has been known to cause |
| glibc to issue bogus negative syscall numbers. So for |
| our purposes, make strace print what it *should* have been */ |
| long correct_scno = (scno & 0xff); |
| if (debug_flag) |
| fprintf(stderr, |
| "Detected glibc bug: bogus system call" |
| " number = %ld, correcting to %ld\n", |
| scno, |
| correct_scno); |
| scno = correct_scno; |
| } |
| #elif defined(SH64) |
| if (upeek(tcp, REG_SYSCALL, &scno) < 0) |
| return -1; |
| scno &= 0xFFFF; |
| #elif defined(CRISV10) || defined(CRISV32) |
| if (upeek(tcp, 4*PT_R9, &scno) < 0) |
| return -1; |
| #elif defined(TILE) |
| if (upeek(tcp, PTREGS_OFFSET_REG(10), &scno) < 0) |
| return -1; |
| #elif defined(MICROBLAZE) |
| if (upeek(tcp, 0, &scno) < 0) |
| return -1; |
| #endif |
| |
| #if defined(SH) |
| /* new syscall ABI returns result in R0 */ |
| if (upeek(tcp, 4*REG_REG0, (long *)&r0) < 0) |
| return -1; |
| #elif defined(SH64) |
| /* ABI defines result returned in r9 */ |
| if (upeek(tcp, REG_GENERAL(9), (long *)&r9) < 0) |
| return -1; |
| #endif |
| |
| tcp->scno = scno; |
| return 1; |
| } |
| |
| /* Called at each syscall entry. |
| * Returns: |
| * 0: "ignore this ptrace stop", bail out of trace_syscall() silently. |
| * 1: ok, continue in trace_syscall(). |
| * other: error, trace_syscall() should print error indicator |
| * ("????" etc) and bail out. |
| */ |
| static int |
| syscall_fixup_on_sysenter(struct tcb *tcp) |
| { |
| /* A common case of "not a syscall entry" is post-execve SIGTRAP */ |
| #if defined(I386) |
| if (i386_regs.eax != -ENOSYS) { |
| if (debug_flag) |
| fprintf(stderr, "not a syscall entry (eax = %ld)\n", i386_regs.eax); |
| return 0; |
| } |
| #elif defined(X86_64) |
| { |
| long rax = x86_64_regs.rax; |
| if (current_personality == 1) |
| rax = (int)rax; /* sign extend from 32 bits */ |
| if (rax != -ENOSYS) { |
| if (debug_flag) |
| fprintf(stderr, "not a syscall entry (rax = %ld)\n", rax); |
| return 0; |
| } |
| } |
| #elif defined(S390) || defined(S390X) |
| /* TODO: we already fetched PT_GPR2 in get_scno |
| * and stored it in syscall_mode, reuse it here |
| * instead of re-fetching? |
| */ |
| if (upeek(tcp, PT_GPR2, &gpr2) < 0) |
| return -1; |
| if (syscall_mode != -ENOSYS) |
| syscall_mode = tcp->scno; |
| if (gpr2 != syscall_mode) { |
| if (debug_flag) |
| fprintf(stderr, "not a syscall entry (gpr2 = %ld)\n", gpr2); |
| return 0; |
| } |
| #elif defined(M68K) |
| /* TODO? Eliminate upeek's in arches below like we did in x86 */ |
| if (upeek(tcp, 4*PT_D0, &d0) < 0) |
| return -1; |
| if (d0 != -ENOSYS) { |
| if (debug_flag) |
| fprintf(stderr, "not a syscall entry (d0 = %ld)\n", d0); |
| return 0; |
| } |
| #elif defined(IA64) |
| if (upeek(tcp, PT_R10, &r10) < 0) |
| return -1; |
| if (upeek(tcp, PT_R8, &r8) < 0) |
| return -1; |
| if (ia32 && r8 != -ENOSYS) { |
| if (debug_flag) |
| fprintf(stderr, "not a syscall entry (r8 = %ld)\n", r8); |
| return 0; |
| } |
| #elif defined(CRISV10) || defined(CRISV32) |
| if (upeek(tcp, 4*PT_R10, &r10) < 0) |
| return -1; |
| if (r10 != -ENOSYS) { |
| if (debug_flag) |
| fprintf(stderr, "not a syscall entry (r10 = %ld)\n", r10); |
| return 0; |
| } |
| #elif defined(MICROBLAZE) |
| if (upeek(tcp, 3 * 4, &r3) < 0) |
| return -1; |
| if (r3 != -ENOSYS) { |
| if (debug_flag) |
| fprintf(stderr, "not a syscall entry (r3 = %ld)\n", r3); |
| return 0; |
| } |
| #endif |
| return 1; |
| } |
| |
| static int |
| internal_syscall(struct tcb *tcp) |
| { |
| /* |
| * We must always trace a few critical system calls in order to |
| * correctly support following forks in the presence of tracing |
| * qualifiers. |
| */ |
| int (*func)(); |
| |
| if (!SCNO_IN_RANGE(tcp->scno)) |
| return 0; |
| |
| func = sysent[tcp->scno].sys_func; |
| |
| if ( sys_fork == func |
| || sys_vfork == func |
| || sys_clone == func |
| ) |
| return internal_fork(tcp); |
| |
| #if defined(TCB_WAITEXECVE) |
| if ( sys_execve == func |
| # if defined(SPARC) || defined(SPARC64) |
| || sys_execv == func |
| # endif |
| ) |
| return internal_exec(tcp); |
| #endif |
| |
| return 0; |
| } |
| |
| static int |
| syscall_enter(struct tcb *tcp) |
| { |
| int i, nargs; |
| |
| if (SCNO_IN_RANGE(tcp->scno)) |
| nargs = tcp->u_nargs = sysent[tcp->scno].nargs; |
| else |
| nargs = tcp->u_nargs = MAX_ARGS; |
| |
| #if defined(S390) || defined(S390X) |
| for (i = 0; i < nargs; ++i) |
| if (upeek(tcp, i==0 ? PT_ORIGGPR2 : PT_GPR2 + i*sizeof(long), &tcp->u_arg[i]) < 0) |
| return -1; |
| #elif defined(ALPHA) |
| for (i = 0; i < nargs; ++i) |
| if (upeek(tcp, REG_A0+i, &tcp->u_arg[i]) < 0) |
| return -1; |
| #elif defined(IA64) |
| if (!ia32) { |
| unsigned long *out0, cfm, sof, sol; |
| long rbs_end; |
| /* be backwards compatible with kernel < 2.4.4... */ |
| # ifndef PT_RBS_END |
| # define PT_RBS_END PT_AR_BSP |
| # endif |
| |
| if (upeek(tcp, PT_RBS_END, &rbs_end) < 0) |
| return -1; |
| if (upeek(tcp, PT_CFM, (long *) &cfm) < 0) |
| return -1; |
| |
| sof = (cfm >> 0) & 0x7f; |
| sol = (cfm >> 7) & 0x7f; |
| out0 = ia64_rse_skip_regs((unsigned long *) rbs_end, -sof + sol); |
| |
| for (i = 0; i < nargs; ++i) { |
| if (umoven(tcp, (unsigned long) ia64_rse_skip_regs(out0, i), |
| sizeof(long), (char *) &tcp->u_arg[i]) < 0) |
| return -1; |
| } |
| } else { |
| static const int argreg[MAX_ARGS] = { PT_R11 /* EBX = out0 */, |
| PT_R9 /* ECX = out1 */, |
| PT_R10 /* EDX = out2 */, |
| PT_R14 /* ESI = out3 */, |
| PT_R15 /* EDI = out4 */, |
| PT_R13 /* EBP = out5 */}; |
| |
| for (i = 0; i < nargs; ++i) { |
| if (upeek(tcp, argreg[i], &tcp->u_arg[i]) < 0) |
| return -1; |
| /* truncate away IVE sign-extension */ |
| tcp->u_arg[i] &= 0xffffffff; |
| } |
| } |
| #elif defined(LINUX_MIPSN32) || defined(LINUX_MIPSN64) |
| /* N32 and N64 both use up to six registers. */ |
| unsigned long long regs[38]; |
| |
| if (ptrace(PTRACE_GETREGS, tcp->pid, NULL, (long) ®s) < 0) |
| return -1; |
| |
| for (i = 0; i < nargs; ++i) { |
| tcp->u_arg[i] = regs[REG_A0 + i]; |
| # if defined(LINUX_MIPSN32) |
| tcp->ext_arg[i] = regs[REG_A0 + i]; |
| # endif |
| } |
| #elif defined(MIPS) |
| if (nargs > 4) { |
| long sp; |
| |
| if (upeek(tcp, REG_SP, &sp) < 0) |
| return -1; |
| for (i = 0; i < 4; ++i) |
| if (upeek(tcp, REG_A0 + i, &tcp->u_arg[i]) < 0) |
| return -1; |
| umoven(tcp, sp + 16, (nargs - 4) * sizeof(tcp->u_arg[0]), |
| (char *)(tcp->u_arg + 4)); |
| } else { |
| for (i = 0; i < nargs; ++i) |
| if (upeek(tcp, REG_A0 + i, &tcp->u_arg[i]) < 0) |
| return -1; |
| } |
| #elif defined(POWERPC) |
| # ifndef PT_ORIG_R3 |
| # define PT_ORIG_R3 34 |
| # endif |
| for (i = 0; i < nargs; ++i) { |
| if (upeek(tcp, (i==0) ? |
| (sizeof(unsigned long) * PT_ORIG_R3) : |
| ((i+PT_R3) * sizeof(unsigned long)), |
| &tcp->u_arg[i]) < 0) |
| return -1; |
| } |
| #elif defined(SPARC) || defined(SPARC64) |
| for (i = 0; i < nargs; ++i) |
| tcp->u_arg[i] = regs.u_regs[U_REG_O0 + i]; |
| #elif defined(HPPA) |
| for (i = 0; i < nargs; ++i) |
| if (upeek(tcp, PT_GR26-4*i, &tcp->u_arg[i]) < 0) |
| return -1; |
| #elif defined(ARM) |
| for (i = 0; i < nargs; ++i) |
| tcp->u_arg[i] = regs.uregs[i]; |
| #elif defined(AVR32) |
| (void)i; |
| (void)nargs; |
| tcp->u_arg[0] = regs.r12; |
| tcp->u_arg[1] = regs.r11; |
| tcp->u_arg[2] = regs.r10; |
| tcp->u_arg[3] = regs.r9; |
| tcp->u_arg[4] = regs.r5; |
| tcp->u_arg[5] = regs.r3; |
| #elif defined(BFIN) |
| static const int argreg[MAX_ARGS] = { PT_R0, PT_R1, PT_R2, PT_R3, PT_R4, PT_R5 }; |
| |
| for (i = 0; i < nargs; ++i) |
| if (upeek(tcp, argreg[i], &tcp->u_arg[i]) < 0) |
| return -1; |
| #elif defined(SH) |
| static const int syscall_regs[MAX_ARGS] = { |
| 4 * (REG_REG0+4), 4 * (REG_REG0+5), 4 * (REG_REG0+6), |
| 4 * (REG_REG0+7), 4 * (REG_REG0 ), 4 * (REG_REG0+1) |
| }; |
| |
| for (i = 0; i < nargs; ++i) |
| if (upeek(tcp, syscall_regs[i], &tcp->u_arg[i]) < 0) |
| return -1; |
| #elif defined(SH64) |
| int i; |
| /* Registers used by SH5 Linux system calls for parameters */ |
| static const int syscall_regs[MAX_ARGS] = { 2, 3, 4, 5, 6, 7 }; |
| |
| for (i = 0; i < nargs; ++i) |
| if (upeek(tcp, REG_GENERAL(syscall_regs[i]), &tcp->u_arg[i]) < 0) |
| return -1; |
| #elif defined(X86_64) |
| (void)i; |
| (void)nargs; |
| if (current_personality == 0) { /* x86-64 ABI */ |
| tcp->u_arg[0] = x86_64_regs.rdi; |
| tcp->u_arg[1] = x86_64_regs.rsi; |
| tcp->u_arg[2] = x86_64_regs.rdx; |
| tcp->u_arg[3] = x86_64_regs.r10; |
| tcp->u_arg[4] = x86_64_regs.r8; |
| tcp->u_arg[5] = x86_64_regs.r9; |
| } else { /* i386 ABI */ |
| /* Sign-extend lower 32 bits */ |
| tcp->u_arg[0] = (long)(int)x86_64_regs.rbx; |
| tcp->u_arg[1] = (long)(int)x86_64_regs.rcx; |
| tcp->u_arg[2] = (long)(int)x86_64_regs.rdx; |
| tcp->u_arg[3] = (long)(int)x86_64_regs.rsi; |
| tcp->u_arg[4] = (long)(int)x86_64_regs.rdi; |
| tcp->u_arg[5] = (long)(int)x86_64_regs.rbp; |
| } |
| #elif defined(MICROBLAZE) |
| for (i = 0; i < nargs; ++i) |
| if (upeek(tcp, (5 + i) * 4, &tcp->u_arg[i]) < 0) |
| return -1; |
| #elif defined(CRISV10) || defined(CRISV32) |
| static const int crisregs[MAX_ARGS] = { |
| 4*PT_ORIG_R10, 4*PT_R11, 4*PT_R12, |
| 4*PT_R13 , 4*PT_MOF, 4*PT_SRP |
| }; |
| |
| for (i = 0; i < nargs; ++i) |
| if (upeek(tcp, crisregs[i], &tcp->u_arg[i]) < 0) |
| return -1; |
| #elif defined(TILE) |
| for (i = 0; i < nargs; ++i) |
| if (upeek(tcp, PTREGS_OFFSET_REG(i), &tcp->u_arg[i]) < 0) |
| return -1; |
| #elif defined(M68K) |
| for (i = 0; i < nargs; ++i) |
| if (upeek(tcp, (i < 5 ? i : i + 2)*4, &tcp->u_arg[i]) < 0) |
| return -1; |
| #elif defined(I386) |
| (void)i; |
| (void)nargs; |
| tcp->u_arg[0] = i386_regs.ebx; |
| tcp->u_arg[1] = i386_regs.ecx; |
| tcp->u_arg[2] = i386_regs.edx; |
| tcp->u_arg[3] = i386_regs.esi; |
| tcp->u_arg[4] = i386_regs.edi; |
| tcp->u_arg[5] = i386_regs.ebp; |
| #else /* Other architecture (32bits specific) */ |
| for (i = 0; i < nargs; ++i) |
| if (upeek(tcp, i*4, &tcp->u_arg[i]) < 0) |
| return -1; |
| #endif |
| return 1; |
| } |
| |
| static int |
| trace_syscall_entering(struct tcb *tcp) |
| { |
| int res, scno_good; |
| |
| #if defined TCB_WAITEXECVE |
| if (tcp->flags & TCB_WAITEXECVE) { |
| /* This is the post-execve SIGTRAP. */ |
| tcp->flags &= ~TCB_WAITEXECVE; |
| return 0; |
| } |
| #endif |
| |
| scno_good = res = get_scno(tcp); |
| if (res == 0) |
| return res; |
| if (res == 1) |
| res = syscall_fixup_on_sysenter(tcp); |
| if (res == 0) |
| return res; |
| if (res == 1) |
| res = syscall_enter(tcp); |
| if (res == 0) |
| return res; |
| |
| if (res != 1) { |
| printleader(tcp); |
| tcp->flags &= ~TCB_REPRINT; |
| if (scno_good != 1) |
| tprintf("????" /* anti-trigraph gap */ "("); |
| else if (!SCNO_IN_RANGE(tcp->scno)) |
| tprintf("syscall_%lu(", tcp->scno); |
| else |
| tprintf("%s(", sysent[tcp->scno].sys_name); |
| /* |
| * " <unavailable>" will be added later by the code which |
| * detects ptrace errors. |
| */ |
| goto ret; |
| } |
| |
| #if defined(SYS_socket_subcall) || defined(SYS_ipc_subcall) |
| while (SCNO_IN_RANGE(tcp->scno)) { |
| # ifdef SYS_socket_subcall |
| if (sysent[tcp->scno].sys_func == sys_socketcall) { |
| decode_subcall(tcp, SYS_socket_subcall, |
| SYS_socket_nsubcalls, deref_style); |
| break; |
| } |
| # endif |
| # ifdef SYS_ipc_subcall |
| if (sysent[tcp->scno].sys_func == sys_ipc) { |
| decode_subcall(tcp, SYS_ipc_subcall, |
| SYS_ipc_nsubcalls, shift_style); |
| break; |
| } |
| # endif |
| break; |
| } |
| #endif /* SYS_socket_subcall || SYS_ipc_subcall */ |
| |
| internal_syscall(tcp); |
| |
| if ((SCNO_IN_RANGE(tcp->scno) && |
| !(qual_flags[tcp->scno] & QUAL_TRACE)) || |
| (tracing_paths && !pathtrace_match(tcp))) { |
| tcp->flags |= TCB_INSYSCALL | TCB_FILTERED; |
| return 0; |
| } |
| |
| tcp->flags &= ~TCB_FILTERED; |
| |
| if (cflag == CFLAG_ONLY_STATS) { |
| res = 0; |
| goto ret; |
| } |
| |
| printleader(tcp); |
| tcp->flags &= ~TCB_REPRINT; |
| if (!SCNO_IN_RANGE(tcp->scno)) |
| tprintf("syscall_%lu(", tcp->scno); |
| else |
| tprintf("%s(", sysent[tcp->scno].sys_name); |
| if (!SCNO_IN_RANGE(tcp->scno) || |
| ((qual_flags[tcp->scno] & QUAL_RAW) && |
| sysent[tcp->scno].sys_func != sys_exit)) |
| res = printargs(tcp); |
| else |
| res = (*sysent[tcp->scno].sys_func)(tcp); |
| |
| if (fflush(tcp->outf) == EOF) |
| return -1; |
| ret: |
| tcp->flags |= TCB_INSYSCALL; |
| /* Measure the entrance time as late as possible to avoid errors. */ |
| if (Tflag || cflag) |
| gettimeofday(&tcp->etime, NULL); |
| return res; |
| } |
| |
| /* Returns: |
| * 0: "ignore this ptrace stop", bail out of trace_syscall() silently. |
| * 1: ok, continue in trace_syscall(). |
| * other: error, trace_syscall() should print error indicator |
| * ("????" etc) and bail out. |
| */ |
| static int |
| get_syscall_result(struct tcb *tcp) |
| { |
| #if defined(S390) || defined(S390X) |
| if (upeek(tcp, PT_GPR2, &gpr2) < 0) |
| return -1; |
| #elif defined(POWERPC) |
| # define SO_MASK 0x10000000 |
| { |
| long flags; |
| if (upeek(tcp, sizeof(unsigned long)*PT_CCR, &flags) < 0) |
| return -1; |
| if (upeek(tcp, sizeof(unsigned long)*PT_R3, &result) < 0) |
| return -1; |
| if (flags & SO_MASK) |
| result = -result; |
| } |
| #elif defined(AVR32) |
| /* Read complete register set in one go. */ |
| if (ptrace(PTRACE_GETREGS, tcp->pid, NULL, ®s) < 0) |
| return -1; |
| #elif defined(BFIN) |
| if (upeek(tcp, PT_R0, &r0) < 0) |
| return -1; |
| #elif defined(I386) |
| if (ptrace(PTRACE_GETREGS, tcp->pid, NULL, (long) &i386_regs) < 0) |
| return -1; |
| #elif defined(X86_64) |
| if (ptrace(PTRACE_GETREGS, tcp->pid, NULL, (long) &x86_64_regs) < 0) |
| return -1; |
| #elif defined(IA64) |
| # define IA64_PSR_IS ((long)1 << 34) |
| if (upeek(tcp, PT_CR_IPSR, &psr) >= 0) |
| ia32 = (psr & IA64_PSR_IS) != 0; |
| if (upeek(tcp, PT_R8, &r8) < 0) |
| return -1; |
| if (upeek(tcp, PT_R10, &r10) < 0) |
| return -1; |
| #elif defined(ARM) |
| /* Read complete register set in one go. */ |
| if (ptrace(PTRACE_GETREGS, tcp->pid, NULL, (void *)®s) == -1) |
| return -1; |
| #elif defined(M68K) |
| if (upeek(tcp, 4*PT_D0, &d0) < 0) |
| return -1; |
| #elif defined(LINUX_MIPSN32) |
| unsigned long long regs[38]; |
| |
| if (ptrace(PTRACE_GETREGS, tcp->pid, NULL, (long) ®s) < 0) |
| return -1; |
| a3 = regs[REG_A3]; |
| r2 = regs[REG_V0]; |
| #elif defined(MIPS) |
| if (upeek(tcp, REG_A3, &a3) < 0) |
| return -1; |
| if (upeek(tcp, REG_V0, &r2) < 0) |
| return -1; |
| #elif defined(ALPHA) |
| if (upeek(tcp, REG_A3, &a3) < 0) |
| return -1; |
| if (upeek(tcp, REG_R0, &r0) < 0) |
| return -1; |
| #elif defined(SPARC) || defined(SPARC64) |
| /* Everything we need is in the current register set. */ |
| if (ptrace(PTRACE_GETREGS, tcp->pid, (char *)®s, 0) < 0) |
| return -1; |
| #elif defined(HPPA) |
| if (upeek(tcp, PT_GR28, &r28) < 0) |
| return -1; |
| #elif defined(SH) |
| #elif defined(SH64) |
| #elif defined(CRISV10) || defined(CRISV32) |
| if (upeek(tcp, 4*PT_R10, &r10) < 0) |
| return -1; |
| #elif defined(TILE) |
| #elif defined(MICROBLAZE) |
| if (upeek(tcp, 3 * 4, &r3) < 0) |
| return -1; |
| #endif |
| |
| #if defined(SH) |
| /* new syscall ABI returns result in R0 */ |
| if (upeek(tcp, 4*REG_REG0, (long *)&r0) < 0) |
| return -1; |
| #elif defined(SH64) |
| /* ABI defines result returned in r9 */ |
| if (upeek(tcp, REG_GENERAL(9), (long *)&r9) < 0) |
| return -1; |
| #endif |
| |
| return 1; |
| } |
| |
| /* Called at each syscall exit. |
| * Returns: |
| * 0: "ignore this ptrace stop", bail out of trace_syscall() silently. |
| * 1: ok, continue in trace_syscall(). |
| * other: error, trace_syscall() should print error indicator |
| * ("????" etc) and bail out. |
| */ |
| static int |
| syscall_fixup_on_sysexit(struct tcb *tcp) |
| { |
| #if defined(S390) || defined(S390X) |
| if (syscall_mode != -ENOSYS) |
| syscall_mode = tcp->scno; |
| if ((tcp->flags & TCB_WAITEXECVE) |
| && (gpr2 == -ENOSYS || gpr2 == tcp->scno)) { |
| /* |
| * Return from execve. |
| * Fake a return value of zero. We leave the TCB_WAITEXECVE |
| * flag set for the post-execve SIGTRAP to see and reset. |
| */ |
| gpr2 = 0; |
| } |
| #endif |
| return 1; |
| } |
| |
| /* |
| * Check the syscall return value register value for whether it is |
| * a negated errno code indicating an error, or a success return value. |
| */ |
| static inline int |
| is_negated_errno(unsigned long int val) |
| { |
| unsigned long int max = -(long int) nerrnos; |
| #if SUPPORTED_PERSONALITIES > 1 |
| if (personality_wordsize[current_personality] < sizeof(val)) { |
| val = (unsigned int) val; |
| max = (unsigned int) max; |
| } |
| #endif |
| return val > max; |
| } |
| |
| static int |
| get_error(struct tcb *tcp) |
| { |
| int u_error = 0; |
| int check_errno = 1; |
| if (SCNO_IN_RANGE(tcp->scno) && |
| sysent[tcp->scno].sys_flags & SYSCALL_NEVER_FAILS) { |
| check_errno = 0; |
| } |
| #if defined(S390) || defined(S390X) |
| if (check_errno && is_negated_errno(gpr2)) { |
| tcp->u_rval = -1; |
| u_error = -gpr2; |
| } |
| else { |
| tcp->u_rval = gpr2; |
| } |
| #elif defined(I386) |
| if (check_errno && is_negated_errno(i386_regs.eax)) { |
| tcp->u_rval = -1; |
| u_error = -i386_regs.eax; |
| } |
| else { |
| tcp->u_rval = i386_regs.eax; |
| } |
| #elif defined(X86_64) |
| if (check_errno && is_negated_errno(x86_64_regs.rax)) { |
| tcp->u_rval = -1; |
| u_error = -x86_64_regs.rax; |
| } |
| else { |
| tcp->u_rval = x86_64_regs.rax; |
| } |
| #elif defined(IA64) |
| if (ia32) { |
| int err; |
| |
| err = (int)r8; |
| if (check_errno && is_negated_errno(err)) { |
| tcp->u_rval = -1; |
| u_error = -err; |
| } |
| else { |
| tcp->u_rval = err; |
| } |
| } else { |
| if (check_errno && r10) { |
| tcp->u_rval = -1; |
| u_error = r8; |
| } else { |
| tcp->u_rval = r8; |
| } |
| } |
| #elif defined(MIPS) |
| if (check_errno && a3) { |
| tcp->u_rval = -1; |
| u_error = r2; |
| } else { |
| tcp->u_rval = r2; |
| } |
| #elif defined(POWERPC) |
| if (check_errno && is_negated_errno(result)) { |
| tcp->u_rval = -1; |
| u_error = -result; |
| } |
| else { |
| tcp->u_rval = result; |
| } |
| #elif defined(M68K) |
| if (check_errno && is_negated_errno(d0)) { |
| tcp->u_rval = -1; |
| u_error = -d0; |
| } |
| else { |
| tcp->u_rval = d0; |
| } |
| #elif defined(ARM) |
| if (check_errno && is_negated_errno(regs.ARM_r0)) { |
| tcp->u_rval = -1; |
| u_error = -regs.ARM_r0; |
| } |
| else { |
| tcp->u_rval = regs.ARM_r0; |
| } |
| #elif defined(AVR32) |
| if (check_errno && regs.r12 && (unsigned) -regs.r12 < nerrnos) { |
| tcp->u_rval = -1; |
| u_error = -regs.r12; |
| } |
| else { |
| tcp->u_rval = regs.r12; |
| } |
| #elif defined(BFIN) |
| if (check_errno && is_negated_errno(r0)) { |
| tcp->u_rval = -1; |
| u_error = -r0; |
| } else { |
| tcp->u_rval = r0; |
| } |
| #elif defined(ALPHA) |
| if (check_errno && a3) { |
| tcp->u_rval = -1; |
| u_error = r0; |
| } |
| else { |
| tcp->u_rval = r0; |
| } |
| #elif defined(SPARC) |
| if (check_errno && regs.psr & PSR_C) { |
| tcp->u_rval = -1; |
| u_error = regs.u_regs[U_REG_O0]; |
| } |
| else { |
| tcp->u_rval = regs.u_regs[U_REG_O0]; |
| } |
| #elif defined(SPARC64) |
| if (check_errno && regs.tstate & 0x1100000000UL) { |
| tcp->u_rval = -1; |
| u_error = regs.u_regs[U_REG_O0]; |
| } |
| else { |
| tcp->u_rval = regs.u_regs[U_REG_O0]; |
| } |
| #elif defined(HPPA) |
| if (check_errno && is_negated_errno(r28)) { |
| tcp->u_rval = -1; |
| u_error = -r28; |
| } |
| else { |
| tcp->u_rval = r28; |
| } |
| #elif defined(SH) |
| if (check_errno && is_negated_errno(r0)) { |
| tcp->u_rval = -1; |
| u_error = -r0; |
| } |
| else { |
| tcp->u_rval = r0; |
| } |
| #elif defined(SH64) |
| if (check_errno && is_negated_errno(r9)) { |
| tcp->u_rval = -1; |
| u_error = -r9; |
| } |
| else { |
| tcp->u_rval = r9; |
| } |
| #elif defined(CRISV10) || defined(CRISV32) |
| if (check_errno && r10 && (unsigned) -r10 < nerrnos) { |
| tcp->u_rval = -1; |
| u_error = -r10; |
| } |
| else { |
| tcp->u_rval = r10; |
| } |
| #elif defined(TILE) |
| long rval; |
| if (upeek(tcp, PTREGS_OFFSET_REG(0), &rval) < 0) |
| return -1; |
| if (check_errno && rval < 0 && rval > -nerrnos) { |
| tcp->u_rval = -1; |
| u_error = -rval; |
| } |
| else { |
| tcp->u_rval = rval; |
| } |
| #elif defined(MICROBLAZE) |
| if (check_errno && is_negated_errno(r3)) { |
| tcp->u_rval = -1; |
| u_error = -r3; |
| } |
| else { |
| tcp->u_rval = r3; |
| } |
| #endif |
| tcp->u_error = u_error; |
| return 1; |
| } |
| |
| static void |
| dumpio(struct tcb *tcp) |
| { |
| if (syserror(tcp)) |
| return; |
| if (tcp->u_arg[0] < 0 || tcp->u_arg[0] >= MAX_QUALS) |
| return; |
| if (!SCNO_IN_RANGE(tcp->scno)) |
| return; |
| if (sysent[tcp->scno].sys_func == printargs) |
| return; |
| if (qual_flags[tcp->u_arg[0]] & QUAL_READ) { |
| if (sysent[tcp->scno].sys_func == sys_read || |
| sysent[tcp->scno].sys_func == sys_pread || |
| sysent[tcp->scno].sys_func == sys_recv || |
| sysent[tcp->scno].sys_func == sys_recvfrom) |
| dumpstr(tcp, tcp->u_arg[1], tcp->u_rval); |
| else if (sysent[tcp->scno].sys_func == sys_readv) |
| dumpiov(tcp, tcp->u_arg[2], tcp->u_arg[1]); |
| return; |
| } |
| if (qual_flags[tcp->u_arg[0]] & QUAL_WRITE) { |
| if (sysent[tcp->scno].sys_func == sys_write || |
| sysent[tcp->scno].sys_func == sys_pwrite || |
| sysent[tcp->scno].sys_func == sys_send || |
| sysent[tcp->scno].sys_func == sys_sendto) |
| dumpstr(tcp, tcp->u_arg[1], tcp->u_arg[2]); |
| else if (sysent[tcp->scno].sys_func == sys_writev) |
| dumpiov(tcp, tcp->u_arg[2], tcp->u_arg[1]); |
| return; |
| } |
| } |
| |
| static int |
| trace_syscall_exiting(struct tcb *tcp) |
| { |
| int sys_res; |
| struct timeval tv; |
| int res; |
| long u_error; |
| |
| /* Measure the exit time as early as possible to avoid errors. */ |
| if (Tflag || cflag) |
| gettimeofday(&tv, NULL); |
| |
| #if SUPPORTED_PERSONALITIES > 1 |
| update_personality(tcp, tcp->currpers); |
| #endif |
| res = get_syscall_result(tcp); |
| if (res == 0) |
| return res; |
| if (res == 1) |
| res = syscall_fixup_on_sysexit(tcp); |
| if (res == 0) |
| return res; |
| if (res == 1) |
| res = get_error(tcp); |
| if (res == 0) |
| return res; |
| if (res == 1) |
| internal_syscall(tcp); |
| |
| if (res == 1 && filtered(tcp)) { |
| goto ret; |
| } |
| |
| /* TODO: TCB_REPRINT is probably not necessary: |
| * we can determine whether reprinting is needed |
| * by examining printing_tcp. Something like: |
| * if not in -ff mode, and printing_tcp != tcp, |
| * then the log is not currenlty ends with *our* |
| * syscall entry output, but with something else, |
| * and we need to reprint. |
| * If we'd implement this, printing_tcp = tcp |
| * assignments in code below can be made more logical. |
| */ |
| |
| if (tcp->flags & TCB_REPRINT) { |
| printleader(tcp); |
| if (!SCNO_IN_RANGE(tcp->scno)) |
| tprintf("<... syscall_%lu resumed> ", tcp->scno); |
| else |
| tprintf("<... %s resumed> ", sysent[tcp->scno].sys_name); |
| } |
| |
| if (cflag) { |
| struct timeval t = tv; |
| count_syscall(tcp, &t); |
| if (cflag == CFLAG_ONLY_STATS) { |
| goto ret; |
| } |
| } |
| |
| if (res != 1) { |
| printing_tcp = tcp; |
| tprints(") "); |
| tabto(); |
| tprints("= ? <unavailable>\n"); |
| line_ended(); |
| tcp->flags &= ~TCB_INSYSCALL; |
| return res; |
| } |
| |
| if (!SCNO_IN_RANGE(tcp->scno) |
| || (qual_flags[tcp->scno] & QUAL_RAW)) { |
| printing_tcp = tcp; |
| sys_res = printargs(tcp); |
| } else { |
| /* FIXME: not_failing_only (IOW, option -z) is broken: |
| * failure of syscall is known only after syscall return. |
| * Thus we end up with something like this on, say, ENOENT: |
| * open("doesnt_exist", O_RDONLY <unfinished ...> |
| * {next syscall decode} |
| * whereas the intended result is that open(...) line |
| * is not shown at all. |
| */ |
| if (not_failing_only && tcp->u_error) |
| goto ret; /* ignore failed syscalls */ |
| printing_tcp = tcp; |
| sys_res = (*sysent[tcp->scno].sys_func)(tcp); |
| } |
| |
| tprints(") "); |
| tabto(); |
| u_error = tcp->u_error; |
| if (!SCNO_IN_RANGE(tcp->scno) || |
| qual_flags[tcp->scno] & QUAL_RAW) { |
| if (u_error) |
| tprintf("= -1 (errno %ld)", u_error); |
| else |
| tprintf("= %#lx", tcp->u_rval); |
| } |
| else if (!(sys_res & RVAL_NONE) && u_error) { |
| switch (u_error) { |
| /* Blocked signals do not interrupt any syscalls. |
| * In this case syscalls don't return ERESTARTfoo codes. |
| * |
| * Deadly signals set to SIG_DFL interrupt syscalls |
| * and kill the process regardless of which of the codes below |
| * is returned by the interrupted syscall. |
| * In some cases, kernel forces a kernel-generated deadly |
| * signal to be unblocked and set to SIG_DFL (and thus cause |
| * death) if it is blocked or SIG_IGNed: for example, SIGSEGV |
| * or SIGILL. (The alternative is to leave process spinning |
| * forever on the faulty instruction - not useful). |
| * |
| * SIG_IGNed signals and non-deadly signals set to SIG_DFL |
| * (for example, SIGCHLD, SIGWINCH) interrupt syscalls, |
| * but kernel will always restart them. |
| */ |
| case ERESTARTSYS: |
| /* Most common type of signal-interrupted syscall exit code. |
| * The system call will be restarted with the same arguments |
| * if SA_RESTART is set; otherwise, it will fail with EINTR. |
| */ |
| tprints("= ? ERESTARTSYS (To be restarted if SA_RESTART is set)"); |
| break; |
| case ERESTARTNOINTR: |
| /* Rare. For example, fork() returns this if interrupted. |
| * SA_RESTART is ignored (assumed set): the restart is unconditional. |
| */ |
| tprints("= ? ERESTARTNOINTR (To be restarted)"); |
| break; |
| case ERESTARTNOHAND: |
| /* pause(), rt_sigsuspend() etc use this code. |
| * SA_RESTART is ignored (assumed not set): |
| * syscall won't restart (will return EINTR instead) |
| * even after signal with SA_RESTART set. |
| * However, after SIG_IGN or SIG_DFL signal it will. |
| */ |
| tprints("= ? ERESTARTNOHAND (Interrupted by signal)"); |
| break; |
| case ERESTART_RESTARTBLOCK: |
| /* Syscalls like nanosleep(), poll() which can't be |
| * restarted with their original arguments use this |
| * code. Kernel will execute restart_syscall() instead, |
| * which changes arguments before restarting syscall. |
| * SA_RESTART is ignored (assumed not set) similarly |
| * to ERESTARTNOHAND. (Kernel can't honor SA_RESTART |
| * since restart data is saved in "restart block" |
| * in task struct, and if signal handler uses a syscall |
| * which in turn saves another such restart block, |
| * old data is lost and restart becomes impossible) |
| */ |
| tprints("= ? ERESTART_RESTARTBLOCK (Interrupted by signal)"); |
| break; |
| default: |
| if (u_error < 0) |
| tprintf("= -1 E??? (errno %ld)", u_error); |
| else if (u_error < nerrnos) |
| tprintf("= -1 %s (%s)", errnoent[u_error], |
| strerror(u_error)); |
| else |
| tprintf("= -1 ERRNO_%ld (%s)", u_error, |
| strerror(u_error)); |
| break; |
| } |
| if ((sys_res & RVAL_STR) && tcp->auxstr) |
| tprintf(" (%s)", tcp->auxstr); |
| } |
| else { |
| if (sys_res & RVAL_NONE) |
| tprints("= ?"); |
| else { |
| switch (sys_res & RVAL_MASK) { |
| case RVAL_HEX: |
| tprintf("= %#lx", tcp->u_rval); |
| break; |
| case RVAL_OCTAL: |
| tprintf("= %#lo", tcp->u_rval); |
| break; |
| case RVAL_UDECIMAL: |
| tprintf("= %lu", tcp->u_rval); |
| break; |
| case RVAL_DECIMAL: |
| tprintf("= %ld", tcp->u_rval); |
| break; |
| #ifdef HAVE_LONG_LONG |
| case RVAL_LHEX: |
| tprintf("= %#llx", tcp->u_lrval); |
| break; |
| case RVAL_LOCTAL: |
| tprintf("= %#llo", tcp->u_lrval); |
| break; |
| case RVAL_LUDECIMAL: |
| tprintf("= %llu", tcp->u_lrval); |
| break; |
| case RVAL_LDECIMAL: |
| tprintf("= %lld", tcp->u_lrval); |
| break; |
| #endif |
| default: |
| fprintf(stderr, |
| "invalid rval format\n"); |
| break; |
| } |
| } |
| if ((sys_res & RVAL_STR) && tcp->auxstr) |
| tprintf(" (%s)", tcp->auxstr); |
| } |
| if (Tflag) { |
| tv_sub(&tv, &tv, &tcp->etime); |
| tprintf(" <%ld.%06ld>", |
| (long) tv.tv_sec, (long) tv.tv_usec); |
| } |
| tprints("\n"); |
| dumpio(tcp); |
| line_ended(); |
| |
| ret: |
| tcp->flags &= ~TCB_INSYSCALL; |
| return 0; |
| } |
| |
| int |
| trace_syscall(struct tcb *tcp) |
| { |
| return exiting(tcp) ? |
| trace_syscall_exiting(tcp) : trace_syscall_entering(tcp); |
| } |