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syscall.c
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syscall.c
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/*
* 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.
*/
#include "defs.h"
#include <sys/user.h>
#include <sys/param.h>
#ifdef HAVE_SYS_REG_H
# include <sys/reg.h>
#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
# ifdef HAVE_STRUCT_PTRACE_PEEKSIGINFO_ARGS
# define ptrace_peeksiginfo_args XXX_ptrace_peeksiginfo_args
# endif
# include <linux/ptrace.h>
# undef ptrace_peeksiginfo_args
# 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
/* for struct iovec */
#include <sys/uio.h>
/* for NT_PRSTATUS */
#ifdef HAVE_ELF_H
# include <elf.h>
#endif
#if defined(AARCH64)
# include <asm/ptrace.h>
#endif
#if defined(XTENSA)
# include <asm/ptrace.h>
#endif
#ifndef NSIG
# warning: NSIG is not defined, using 32
# 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 TM TRACE_MEMORY
#define NF SYSCALL_NEVER_FAILS
#define MA MAX_ARGS
const struct_sysent sysent0[] = {
#include "syscallent.h"
};
#if SUPPORTED_PERSONALITIES > 1
static const struct_sysent sysent1[] = {
# include "syscallent1.h"
};
#endif
#if SUPPORTED_PERSONALITIES > 2
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 TM
#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".
*/
const char *const errnoent0[] = {
#include "errnoent.h"
};
const char *const signalent0[] = {
#include "signalent.h"
};
const struct_ioctlent ioctlent0[] = {
#include "ioctlent.h"
};
#if SUPPORTED_PERSONALITIES > 1
static const char *const errnoent1[] = {
# include "errnoent1.h"
};
static const char *const signalent1[] = {
# include "signalent1.h"
};
static const struct_ioctlent ioctlent1[] = {
# include "ioctlent1.h"
};
#endif
#if SUPPORTED_PERSONALITIES > 2
static const char *const errnoent2[] = {
# include "errnoent2.h"
};
static const char *const signalent2[] = {
# include "signalent2.h"
};
static const struct_ioctlent ioctlent2[] = {
# include "ioctlent2.h"
};
#endif
enum {
nsyscalls0 = ARRAY_SIZE(sysent0)
#if SUPPORTED_PERSONALITIES > 1
, nsyscalls1 = ARRAY_SIZE(sysent1)
# if SUPPORTED_PERSONALITIES > 2
, nsyscalls2 = ARRAY_SIZE(sysent2)
# endif
#endif
};
enum {
nerrnos0 = ARRAY_SIZE(errnoent0)
#if SUPPORTED_PERSONALITIES > 1
, nerrnos1 = ARRAY_SIZE(errnoent1)
# if SUPPORTED_PERSONALITIES > 2
, nerrnos2 = ARRAY_SIZE(errnoent2)
# endif
#endif
};
enum {
nsignals0 = ARRAY_SIZE(signalent0)
#if SUPPORTED_PERSONALITIES > 1
, nsignals1 = ARRAY_SIZE(signalent1)
# if SUPPORTED_PERSONALITIES > 2
, nsignals2 = ARRAY_SIZE(signalent2)
# endif
#endif
};
enum {
nioctlents0 = ARRAY_SIZE(ioctlent0)
#if SUPPORTED_PERSONALITIES > 1
, nioctlents1 = ARRAY_SIZE(ioctlent1)
# if SUPPORTED_PERSONALITIES > 2
, nioctlents2 = ARRAY_SIZE(ioctlent2)
# endif
#endif
};
#if SUPPORTED_PERSONALITIES > 1
const struct_sysent *sysent = sysent0;
const char *const *errnoent = errnoent0;
const char *const *signalent = signalent0;
const struct_ioctlent *ioctlent = ioctlent0;
#endif
unsigned nsyscalls = nsyscalls0;
unsigned nerrnos = nerrnos0;
unsigned nsignals = nsignals0;
unsigned nioctlents = nioctlents0;
unsigned num_quals;
qualbits_t *qual_vec[SUPPORTED_PERSONALITIES];
static const unsigned nsyscall_vec[SUPPORTED_PERSONALITIES] = {
nsyscalls0,
#if SUPPORTED_PERSONALITIES > 1
nsyscalls1,
#endif
#if SUPPORTED_PERSONALITIES > 2
nsyscalls2,
#endif
};
static const struct_sysent *const sysent_vec[SUPPORTED_PERSONALITIES] = {
sysent0,
#if SUPPORTED_PERSONALITIES > 1
sysent1,
#endif
#if SUPPORTED_PERSONALITIES > 2
sysent2,
#endif
};
enum {
MAX_NSYSCALLS1 = (nsyscalls0
#if SUPPORTED_PERSONALITIES > 1
> nsyscalls1 ? nsyscalls0 : nsyscalls1
#endif
),
MAX_NSYSCALLS2 = (MAX_NSYSCALLS1
#if SUPPORTED_PERSONALITIES > 2
> nsyscalls2 ? MAX_NSYSCALLS1 : nsyscalls2
#endif
),
MAX_NSYSCALLS = MAX_NSYSCALLS2,
/* We are ready for arches with up to 255 signals,
* even though the largest known signo is on MIPS and it is 128.
* The number of existing syscalls on all arches is
* larger that 255 anyway, so it is just a pedantic matter.
*/
MIN_QUALS = MAX_NSYSCALLS > 255 ? MAX_NSYSCALLS : 255
};
#if SUPPORTED_PERSONALITIES > 1
unsigned current_personality;
# ifndef current_wordsize
unsigned current_wordsize;
static const int personality_wordsize[SUPPORTED_PERSONALITIES] = {
PERSONALITY0_WORDSIZE,
PERSONALITY1_WORDSIZE,
# if SUPPORTED_PERSONALITIES > 2
PERSONALITY2_WORDSIZE,
# endif
};
# endif
void
set_personality(int personality)
{
nsyscalls = nsyscall_vec[personality];
sysent = sysent_vec[personality];
switch (personality) {
case 0:
errnoent = errnoent0;
nerrnos = nerrnos0;
ioctlent = ioctlent0;
nioctlents = nioctlents0;
signalent = signalent0;
nsignals = nsignals0;
break;
case 1:
errnoent = errnoent1;
nerrnos = nerrnos1;
ioctlent = ioctlent1;
nioctlents = nioctlents1;
signalent = signalent1;
nsignals = nsignals1;
break;
# if SUPPORTED_PERSONALITIES > 2
case 2:
errnoent = errnoent2;
nerrnos = nerrnos2;
ioctlent = ioctlent2;
nioctlents = nioctlents2;
signalent = signalent2;
nsignals = nsignals2;
break;
# endif
}
current_personality = personality;
# ifndef current_wordsize
current_wordsize = personality_wordsize[personality];
# endif
}
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)
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]);
}
# elif defined(X86_64)
if (!qflag) {
static const char *const names[] = {"64 bit", "32 bit", "x32"};
fprintf(stderr, "[ Process PID=%d runs in %s mode. ]\n",
tcp->pid, names[personality]);
}
# elif defined(X32)
if (!qflag) {
static const char *const names[] = {"x32", "32 bit"};
fprintf(stderr, "[ Process PID=%d runs in %s mode. ]\n",
tcp->pid, names[personality]);
}
# elif defined(AARCH64)
if (!qflag) {
static const char *const names[] = {"32-bit", "AArch64"};
fprintf(stderr, "[ Process PID=%d runs in %s mode. ]\n",
tcp->pid, names[personality]);
}
# elif defined(TILE)
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_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_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
reallocate_qual(int n)
{
unsigned p;
qualbits_t *qp;
for (p = 0; p < SUPPORTED_PERSONALITIES; p++) {
qp = qual_vec[p] = realloc(qual_vec[p], n * sizeof(qualbits_t));
if (!qp)
die_out_of_memory();
memset(&qp[num_quals], 0, (n - num_quals) * sizeof(qualbits_t));
}
num_quals = n;
}
static void
qualify_one(int n, int bitflag, int not, int pers)
{
unsigned p;
if (num_quals <= n)
reallocate_qual(n + 1);
for (p = 0; p < SUPPORTED_PERSONALITIES; p++) {
if (pers == p || pers < 0) {
if (not)
qual_vec[p][n] &= ~bitflag;
else
qual_vec[p][n] |= bitflag;
}
}
}
static int
qual_syscall(const char *s, int bitflag, int not)
{
unsigned p;
unsigned i;
int rc = -1;
if (*s >= '0' && *s <= '9') {
i = string_to_uint(s);
if (i >= MAX_NSYSCALLS)
return -1;
qualify_one(i, bitflag, not, -1);
return 0;
}
for (p = 0; p < SUPPORTED_PERSONALITIES; p++) {
for (i = 0; i < nsyscall_vec[p]; i++) {
if (sysent_vec[p][i].sys_name
&& strcmp(s, sysent_vec[p][i].sys_name) == 0
) {
qualify_one(i, bitflag, not, p);
rc = 0;
}
}
}
return rc;
}
static int
qual_signal(const char *s, int bitflag, int not)
{
int i;
if (*s >= '0' && *s <= '9') {
int signo = string_to_uint(s);
if (signo < 0 || signo > 255)
return -1;
qualify_one(signo, bitflag, not, -1);
return 0;
}
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_desc(const char *s, int bitflag, int not)
{
if (*s >= '0' && *s <= '9') {
int desc = string_to_uint(s);
if (desc < 0 || desc > 0x7fff) /* paranoia */
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;
if (strcmp(s, "memory") == 0)
return TRACE_MEMORY;
return -1;
}
void
qualify(const char *s)
{
const struct qual_options *opt;
int not;
char *copy;
const char *p;
int i, n;
if (num_quals == 0)
reallocate_qual(MIN_QUALS);
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 < num_quals; i++) {
qualify_one(i, opt->bitflag, not, -1);
}
return;
}
for (i = 0; i < num_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) {
unsigned pers;
for (pers = 0; pers < SUPPORTED_PERSONALITIES; pers++) {
for (i = 0; i < nsyscall_vec[pers]; i++)
if (sysent_vec[pers][i].sys_flags & n)
qualify_one(i, opt->bitflag, not, pers);
}
continue;
}
if (opt->qualify(p, opt->bitflag, not)) {
error_msg_and_die("invalid %s '%s'",
opt->argument_name, p);
}
}
free(copy);
return;
}
#ifdef SYS_socket_subcall
static void
decode_socket_subcall(struct tcb *tcp)
{
unsigned long addr;
unsigned int i, n, size;
if (tcp->u_arg[0] < 0 || tcp->u_arg[0] >= SYS_socket_nsubcalls)
return;
tcp->scno = SYS_socket_subcall + tcp->u_arg[0];
tcp->qual_flg = qual_flags[tcp->scno];
tcp->s_ent = &sysent[tcp->scno];
addr = tcp->u_arg[1];
size = current_wordsize;
n = tcp->s_ent->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 {
unsigned long arg;
if (umove(tcp, addr, &arg) < 0)
arg = 0;
tcp->u_arg[i] = arg;
}
addr += size;
}
}
#endif
#ifdef SYS_ipc_subcall
static void
decode_ipc_subcall(struct tcb *tcp)
{
unsigned int i, n;
if (tcp->u_arg[0] < 0 || tcp->u_arg[0] >= SYS_ipc_nsubcalls)
return;
tcp->scno = SYS_ipc_subcall + tcp->u_arg[0];
tcp->qual_flg = qual_flags[tcp->scno];
tcp->s_ent = &sysent[tcp->scno];
n = tcp->s_ent->nargs;
for (i = 0; i < n; i++)
tcp->u_arg[i] = tcp->u_arg[i + 1];
}
#endif
int
printargs(struct tcb *tcp)
{
if (entering(tcp)) {
int i;
int n = tcp->s_ent->nargs;
for (i = 0; i < n; i++)
tprintf("%s%#lx", i ? ", " : "", tcp->u_arg[i]);
}
return 0;
}
int
printargs_lu(struct tcb *tcp)
{
if (entering(tcp)) {
int i;
int n = tcp->s_ent->nargs;
for (i = 0; i < n; i++)
tprintf("%s%lu", i ? ", " : "", tcp->u_arg[i]);
}
return 0;
}
int
printargs_ld(struct tcb *tcp)
{
if (entering(tcp)) {
int i;
int n = tcp->s_ent->nargs;
for (i = 0; i < n; i++)
tprintf("%s%ld", i ? ", " : "", tcp->u_arg[i]);
}
return 0;
}
#if defined(SPARC) || defined(SPARC64) || defined(IA64) || defined(SH)
long
getrval2(struct tcb *tcp)
{
long val;
# if defined(SPARC) || defined(SPARC64)
val = sparc_regs.u_regs[U_REG_O1];
# elif defined(SH)
if (upeek(tcp->pid, 4*(REG_REG0+1), &val) < 0)
return -1;
# elif defined(IA64)
if (upeek(tcp->pid, PT_R9, &val) < 0)
return -1;
# endif
return val;
}
#endif
#if defined(I386)
static struct user_regs_struct i386_regs;
/* Cast suppresses signedness warning (.esp is long, not unsigned long) */
uint32_t *const i386_esp_ptr = (uint32_t*)&i386_regs.esp;
# define ARCH_REGS_FOR_GETREGSET i386_regs
#elif defined(X86_64) || defined(X32)
/*
* On i386, pt_regs and user_regs_struct are the same,
* but on 64 bit x86, 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.
*/
struct i386_user_regs_struct {
uint32_t ebx;
uint32_t ecx;
uint32_t edx;
uint32_t esi;
uint32_t edi;
uint32_t ebp;
uint32_t eax;
uint32_t xds;
uint32_t xes;
uint32_t xfs;
uint32_t xgs;
uint32_t orig_eax;
uint32_t eip;
uint32_t xcs;
uint32_t eflags;
uint32_t esp;
uint32_t xss;
};
static union {
struct user_regs_struct x86_64_r;
struct i386_user_regs_struct i386_r;
} x86_regs_union;
# define x86_64_regs x86_regs_union.x86_64_r
# define i386_regs x86_regs_union.i386_r
uint32_t *const i386_esp_ptr = &i386_regs.esp;
static struct iovec x86_io = {
.iov_base = &x86_regs_union
};
#elif defined(IA64)
bool ia64_ia32mode = 0; /* not static */
static long ia64_r8, ia64_r10;
#elif defined(POWERPC)
struct pt_regs ppc_regs;
#elif defined(M68K)
static long m68k_d0;
#elif defined(BFIN)
static long bfin_r0;
#elif defined(ARM)
struct pt_regs arm_regs; /* not static */
# define ARCH_REGS_FOR_GETREGSET arm_regs
#elif defined(AARCH64)
static union {
struct user_pt_regs aarch64_r;
struct arm_pt_regs arm_r;
} arm_regs_union;
# define aarch64_regs arm_regs_union.aarch64_r
# define arm_regs arm_regs_union.arm_r
static struct iovec aarch64_io = {
.iov_base = &arm_regs_union
};
#elif defined(ALPHA)
static long alpha_r0;
static long alpha_a3;
#elif defined(AVR32)
static struct pt_regs avr32_regs;
#elif defined(SPARC) || defined(SPARC64)
struct pt_regs sparc_regs; /* not static */
#elif defined(LINUX_MIPSN32)
static long long mips_a3;
static long long mips_r2;
#elif defined(MIPS)
static long mips_a3;
static long mips_r2;
#elif defined(S390) || defined(S390X)
static long s390_gpr2;
#elif defined(HPPA)
static long hppa_r28;
#elif defined(SH)
static long sh_r0;
#elif defined(SH64)
static long sh64_r9;
#elif defined(CRISV10) || defined(CRISV32)
static long cris_r10;
#elif defined(TILE)
struct pt_regs tile_regs;
#elif defined(MICROBLAZE)
static long microblaze_r3;
#elif defined(OR1K)
static struct user_regs_struct or1k_regs;
# define ARCH_REGS_FOR_GETREGSET or1k_regs
#elif defined(METAG)
static struct user_gp_regs metag_regs;
# define ARCH_REGS_FOR_GETREGSET metag_regs
#elif defined(XTENSA)
static long xtensa_a2;
# elif defined(ARC)
static struct user_regs_struct arc_regs;
# define ARCH_REGS_FOR_GETREGSET arc_regs
#endif
void
print_pc(struct tcb *tcp)
{
#define PRINTBADPC tprintf(sizeof(long) == 4 ? "[????????] " : \
sizeof(long) == 8 ? "[????????????????] " : \
NULL /* crash */)
if (get_regs_error) {
PRINTBADPC;
return;
}
#if defined(I386)
tprintf("[%08lx] ", i386_regs.eip);
#elif defined(S390) || defined(S390X)
long psw;
if (upeek(tcp->pid, PT_PSWADDR, &psw) < 0) {
PRINTBADPC;
return;
}
# ifdef S390
tprintf("[%08lx] ", psw);
# elif S390X
tprintf("[%016lx] ", psw);
# endif
#elif defined(X86_64) || defined(X32)
if (x86_io.iov_len == sizeof(i386_regs)) {
tprintf("[%08x] ", (unsigned) i386_regs.eip);
} else {
# if defined(X86_64)
tprintf("[%016lx] ", (unsigned long) x86_64_regs.rip);
# elif defined(X32)
/* Note: this truncates 64-bit rip to 32 bits */
tprintf("[%08lx] ", (unsigned long) x86_64_regs.rip);
# endif
}
#elif defined(IA64)
long ip;
if (upeek(tcp->pid, PT_B0, &ip) < 0) {
PRINTBADPC;
return;
}
tprintf("[%08lx] ", ip);
#elif defined(POWERPC)
long pc = ppc_regs.nip;
# ifdef POWERPC64
tprintf("[%016lx] ", pc);
# else
tprintf("[%08lx] ", pc);
# endif
#elif defined(M68K)
long pc;
if (upeek(tcp->pid, 4*PT_PC, &pc) < 0) {
tprints("[????????] ");
return;
}
tprintf("[%08lx] ", pc);
#elif defined(ALPHA)
long pc;
if (upeek(tcp->pid, REG_PC, &pc) < 0) {
tprints("[????????????????] ");
return;
}
tprintf("[%08lx] ", pc);
#elif defined(SPARC)
tprintf("[%08lx] ", sparc_regs.pc);
#elif defined(SPARC64)
tprintf("[%08lx] ", sparc_regs.tpc);
#elif defined(HPPA)
long pc;
if (upeek(tcp->pid, PT_IAOQ0, &pc) < 0) {
tprints("[????????] ");
return;
}
tprintf("[%08lx] ", pc);
#elif defined(MIPS)
long pc;
if (upeek(tcp->pid, REG_EPC, &pc) < 0) {
tprints("[????????] ");
return;
}
tprintf("[%08lx] ", pc);
#elif defined(SH)
long pc;
if (upeek(tcp->pid, 4*REG_PC, &pc) < 0) {
tprints("[????????] ");
return;
}
tprintf("[%08lx] ", pc);
#elif defined(SH64)
long pc;
if (upeek(tcp->pid, REG_PC, &pc) < 0) {
tprints("[????????????????] ");
return;
}
tprintf("[%08lx] ", pc);
#elif defined(ARM)
tprintf("[%08lx] ", arm_regs.ARM_pc);
#elif defined(AARCH64)
/* tprintf("[%016lx] ", aarch64_regs.regs[???]); */
#elif defined(AVR32)
tprintf("[%08lx] ", avr32_regs.pc);
#elif defined(BFIN)
long pc;
if (upeek(tcp->pid, PT_PC, &pc) < 0) {
PRINTBADPC;
return;
}
tprintf("[%08lx] ", pc);
#elif defined(CRISV10)
long pc;
if (upeek(tcp->pid, 4*PT_IRP, &pc) < 0) {
PRINTBADPC;
return;
}
tprintf("[%08lx] ", pc);
#elif defined(CRISV32)
long pc;
if (upeek(tcp->pid, 4*PT_ERP, &pc) < 0) {
PRINTBADPC;
return;
}
tprintf("[%08lx] ", pc);
#elif defined(TILE)
# ifdef _LP64
tprintf("[%016lx] ", (unsigned long) tile_regs.pc);
# else
tprintf("[%08lx] ", (unsigned long) tile_regs.pc);
# endif
#elif defined(OR1K)
tprintf("[%08lx] ", or1k_regs.pc);
#elif defined(METAG)
tprintf("[%08lx] ", metag_regs.pc);
#elif defined(XTENSA)
long pc;
if (upeek(tcp->pid, REG_PC, &pc) < 0) {
PRINTBADPC;
return;
}
tprintf("[%08lx] ", pc);
#elif defined(ARC)
tprintf("[%08lx] ", arc_regs.efa);
#endif /* architecture */
}
/* Shuffle syscall numbers so that we don't have huge gaps in syscall table.
* The shuffling should be reversible: shuffle_scno(shuffle_scno(n)) == n.
*/
#if defined(ARM) || defined(AARCH64) /* So far only 32-bit ARM needs this */
static long
shuffle_scno(unsigned long scno)
{
if (scno <= ARM_LAST_ORDINARY_SYSCALL)
return scno;
/* __ARM_NR_cmpxchg? Swap with LAST_ORDINARY+1 */
if (scno == 0x000ffff0)
return ARM_LAST_ORDINARY_SYSCALL+1;
if (scno == ARM_LAST_ORDINARY_SYSCALL+1)
return 0x000ffff0;
/* Is it ARM specific syscall?
* Swap with [LAST_ORDINARY+2, LAST_ORDINARY+2 + LAST_SPECIAL] range.
*/
if (scno >= 0x000f0000
&& scno <= 0x000f0000 + ARM_LAST_SPECIAL_SYSCALL
) {
return scno - 0x000f0000 + (ARM_LAST_ORDINARY_SYSCALL+2);
}
if (/* scno >= ARM_LAST_ORDINARY_SYSCALL+2 - always true */ 1
&& scno <= (ARM_LAST_ORDINARY_SYSCALL+2) + ARM_LAST_SPECIAL_SYSCALL
) {
return scno + 0x000f0000 - (ARM_LAST_ORDINARY_SYSCALL+2);
}
return scno;
}
#else
# define shuffle_scno(scno) ((long)(scno))
#endif
static char*
undefined_scno_name(struct tcb *tcp)
{
static char buf[sizeof("syscall_%lu") + sizeof(long)*3];
sprintf(buf, "syscall_%lu", shuffle_scno(tcp->scno));
return buf;
}
#ifdef POWERPC
/*
* PTRACE_GETREGS was added to the PowerPC kernel in v2.6.23,
* we provide a slow fallback for old kernels.
*/
static int powerpc_getregs_old(pid_t pid)
{
int i;
long r;
if (iflag) {
r = upeek(pid, sizeof(long) * PT_NIP, (long *)&ppc_regs.nip);
if (r)
goto out;
}
#ifdef POWERPC64 /* else we never use it */
r = upeek(pid, sizeof(long) * PT_MSR, (long *)&ppc_regs.msr);
if (r)
goto out;
#endif
r = upeek(pid, sizeof(long) * PT_CCR, (long *)&ppc_regs.ccr);
if (r)
goto out;
r = upeek(pid, sizeof(long) * PT_ORIG_R3, (long *)&ppc_regs.orig_gpr3);
if (r)
goto out;
for (i = 0; i <= 8; i++) {
r = upeek(pid, sizeof(long) * (PT_R0 + i),
(long *)&ppc_regs.gpr[i]);
if (r)