*/
#include "defs.h"
-#include <sys/user.h>
#include <sys/param.h>
#include <fcntl.h>
-#if HAVE_SYS_XATTR_H
+#include <stdarg.h>
+#ifdef HAVE_SYS_XATTR_H
# include <sys/xattr.h>
#endif
#include <sys/uio.h>
-#if defined(IA64)
-# include <asm/ptrace_offsets.h>
-# include <asm/rse.h>
-#endif
-
-#ifdef HAVE_SYS_REG_H
-# include <sys/reg.h>
-#endif
-
-#ifdef 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
+#include "regs.h"
+#include "ptrace.h"
int
-string_to_uint(const char *str)
+string_to_uint_ex(const char *const str, char **const endptr,
+ const unsigned int max_val, const char *const accepted_ending)
{
- char *error;
- long value;
+ char *end;
+ long val;
if (!*str)
return -1;
+
errno = 0;
- value = strtol(str, &error, 10);
- if (errno || *error || value < 0 || (long)(int)value != value)
+ val = strtol(str, &end, 10);
+
+ if (str == end || val < 0 || (unsigned long) val > max_val
+ || (val == LONG_MAX && errno == ERANGE))
+ return -1;
+
+ if (*end && (!accepted_ending || !strchr(accepted_ending, *end)))
return -1;
- return (int)value;
+
+ if (endptr)
+ *endptr = end;
+
+ return (int) val;
+}
+
+int
+string_to_uint(const char *const str)
+{
+ return string_to_uint_upto(str, INT_MAX);
}
int
}
const char *
-xlookup(const struct xlat *xlat, const unsigned int val)
+xlookup(const struct xlat *xlat, const uint64_t val)
{
for (; xlat->str != NULL; xlat++)
if (xlat->val == val)
static int
xlat_bsearch_compare(const void *a, const void *b)
{
- const unsigned int val1 = (const unsigned long) a;
- const unsigned int val2 = ((const struct xlat *) b)->val;
+ const uint64_t val1 = *(const uint64_t *) a;
+ const uint64_t val2 = ((const struct xlat *) b)->val;
return (val1 > val2) ? 1 : (val1 < val2) ? -1 : 0;
}
const char *
-xlat_search(const struct xlat *xlat, const size_t nmemb, const unsigned int val)
+xlat_search(const struct xlat *xlat, const size_t nmemb, const uint64_t val)
{
const struct xlat *e =
- bsearch((const void*) (const unsigned long) val,
+ bsearch((const void*) &val,
xlat, nmemb, sizeof(*xlat), xlat_bsearch_compare);
return e ? e->str : NULL;
next_set_bit(const void *bit_array, unsigned cur_bit, unsigned size_bits)
{
const unsigned endian = 1;
- int little_endian = *(char*)&endian;
+ int little_endian = * (char *) (void *) &endian;
const uint8_t *array = bit_array;
unsigned pos = cur_bit / 8;
pos++;
}
}
-/*
+
+/**
* Print entry in struct xlat table, if there.
+ *
+ * @param val Value to search a literal representation for.
+ * @param dflt String (abbreviated in comment syntax) which should be emitted
+ * if no appropriate xlat value has been found.
+ * @param xlat (And the following arguments) Pointers to arrays of xlat values.
+ * The last argument should be NULL.
+ * @return 1 if appropriate xlat value has been found, 0 otherwise.
*/
-void
-printxval(const struct xlat *xlat, const unsigned int val, const char *dflt)
+int
+printxvals(const uint64_t val, const char *dflt, const struct xlat *xlat, ...)
{
- const char *str = xlookup(xlat, val);
+ va_list args;
- if (str)
- tprints(str);
- else
- tprintf("%#x /* %s */", val, dflt);
+ va_start(args, xlat);
+ for (; xlat; xlat = va_arg(args, const struct xlat *)) {
+ const char *str = xlookup(xlat, val);
+
+ if (str) {
+ tprints(str);
+ va_end(args);
+ return 1;
+ }
+ }
+ /* No hits -- print raw # instead. */
+ tprintf("%#" PRIx64, val);
+ if (dflt)
+ tprintf(" /* %s */", dflt);
+
+ va_end(args);
+
+ return 0;
+}
+
+/**
+ * Print entry in sorted struct xlat table, if it is there.
+ *
+ * @param xlat Pointer to an array of xlat values (not terminated with
+ * XLAT_END).
+ * @param xlat_size Number of xlat elements present in array (usually ARRAY_SIZE
+ * if array is declared in the unit's scope and not
+ * terminated with XLAT_END).
+ * @param val Value to search literal representation for.
+ * @param dflt String (abbreviated in comment syntax) which should be
+ * emitted if no appropriate xlat value has been found.
+ * @return 1 if appropriate xlat value has been found, 0
+ * otherwise.
+ */
+int
+printxval_searchn(const struct xlat *xlat, size_t xlat_size, uint64_t val,
+ const char *dflt)
+{
+ const char *s = xlat_search(xlat, xlat_size, val);
+
+ if (s) {
+ tprints(s);
+ return 1;
+ }
+
+ tprintf("%#" PRIx64, val);
+ if (dflt)
+ tprintf(" /* %s */", dflt);
+
+ return 0;
}
/*
getllval(struct tcb *tcp, unsigned long long *val, int arg_no)
{
#if SIZEOF_LONG > 4 && SIZEOF_LONG == SIZEOF_LONG_LONG
-# if SUPPORTED_PERSONALITIES > 1
- if (current_wordsize > 4) {
-# endif
- *val = tcp->u_arg[arg_no];
- arg_no++;
-# if SUPPORTED_PERSONALITIES > 1
- } else {
+# ifndef current_klongsize
+ if (current_klongsize < SIZEOF_LONG) {
# if defined(AARCH64) || defined(POWERPC64)
/* Align arg_no to the next even number. */
arg_no = (arg_no + 1) & 0xe;
# endif /* AARCH64 || POWERPC64 */
- *val = LONG_LONG(tcp->u_arg[arg_no], tcp->u_arg[arg_no + 1]);
+ *val = ULONG_LONG(tcp->u_arg[arg_no], tcp->u_arg[arg_no + 1]);
arg_no += 2;
+ } else
+# endif /* !current_klongsize */
+ {
+ *val = tcp->u_arg[arg_no];
+ arg_no++;
}
-# endif /* SUPPORTED_PERSONALITIES > 1 */
#elif SIZEOF_LONG > 4
# error Unsupported configuration: SIZEOF_LONG > 4 && SIZEOF_LONG_LONG > SIZEOF_LONG
-#elif defined LINUX_MIPSN32
- *val = tcp->ext_arg[arg_no];
- arg_no++;
-#elif defined X32
- if (current_personality == 0) {
+#elif HAVE_STRUCT_TCB_EXT_ARG
+# ifndef current_klongsize
+ if (current_klongsize < SIZEOF_LONG_LONG) {
+ *val = ULONG_LONG(tcp->u_arg[arg_no], tcp->u_arg[arg_no + 1]);
+ arg_no += 2;
+ } else
+# endif /* !current_klongsize */
+ {
*val = tcp->ext_arg[arg_no];
arg_no++;
- } else {
- *val = LONG_LONG(tcp->u_arg[arg_no], tcp->u_arg[arg_no + 1]);
- arg_no += 2;
}
#else
# if defined __ARM_EABI__ || \
defined XTENSA
/* Align arg_no to the next even number. */
arg_no = (arg_no + 1) & 0xe;
-# endif
- *val = LONG_LONG(tcp->u_arg[arg_no], tcp->u_arg[arg_no + 1]);
+# elif defined SH
+ /*
+ * The SH4 ABI does allow long longs in odd-numbered registers, but
+ * does not allow them to be split between registers and memory - and
+ * there are only four argument registers for normal functions. As a
+ * result, pread, for example, takes an extra padding argument before
+ * the offset. This was changed late in the 2.4 series (around 2.4.20).
+ */
+ if (arg_no == 3)
+ arg_no++;
+# endif /* __ARM_EABI__ || LINUX_MIPSO32 || POWERPC || XTENSA || SH */
+ *val = ULONG_LONG(tcp->u_arg[arg_no], tcp->u_arg[arg_no + 1]);
arg_no += 2;
#endif
* return # of flags printed.
*/
void
-addflags(const struct xlat *xlat, int flags)
+addflags(const struct xlat *xlat, uint64_t flags)
{
for (; xlat->str; xlat++) {
if (xlat->val && (flags & xlat->val) == xlat->val) {
}
}
if (flags) {
- tprintf("|%#x", flags);
+ tprintf("|%#" PRIx64, flags);
}
}
* Return static string.
*/
const char *
-sprintflags(const char *prefix, const struct xlat *xlat, int flags)
+sprintflags(const char *prefix, const struct xlat *xlat, uint64_t flags)
{
static char outstr[1024];
char *outptr;
outptr = stpcpy(outstr, prefix);
+ if (flags == 0 && xlat->val == 0 && xlat->str) {
+ strcpy(outptr, xlat->str);
+ return outstr;
+ }
+
for (; xlat->str; xlat++) {
- if ((flags & xlat->val) == xlat->val) {
+ if (xlat->val && (flags & xlat->val) == xlat->val) {
if (found)
*outptr++ = '|';
outptr = stpcpy(outptr, xlat->str);
if (flags) {
if (found)
*outptr++ = '|';
- outptr += sprintf(outptr, "%#x", flags);
+ outptr += sprintf(outptr, "%#" PRIx64, flags);
}
return outstr;
}
int
-printflags(const struct xlat *xlat, int flags, const char *dflt)
+printflags64(const struct xlat *xlat, uint64_t flags, const char *dflt)
{
int n;
const char *sep;
- if (flags == 0 && xlat->val == 0) {
+ if (flags == 0 && xlat->val == 0 && xlat->str) {
tprints(xlat->str);
return 1;
}
if (n) {
if (flags) {
- tprintf("%s%#x", sep, flags);
+ tprintf("%s%#" PRIx64, sep, flags);
n++;
}
} else {
if (flags) {
- tprintf("%#x", flags);
+ tprintf("%#" PRIx64, flags);
if (dflt)
tprintf(" /* %s */", dflt);
} else {
}
void
-printnum(struct tcb *tcp, long addr, const char *fmt)
+printaddr(const kernel_ulong_t addr)
{
- long num;
-
- if (!addr) {
+ if (!addr)
tprints("NULL");
- return;
- }
- if (umove(tcp, addr, &num) < 0) {
- tprintf("%#lx", addr);
- return;
- }
- tprints("[");
- tprintf(fmt, num);
- tprints("]");
+ else
+ tprintf("%#" PRI_klx, addr);
}
-void
-printnum_int(struct tcb *tcp, long addr, const char *fmt)
-{
- int num;
+#define DEF_PRINTNUM(name, type) \
+bool \
+printnum_ ## name(struct tcb *const tcp, const kernel_ulong_t addr, \
+ const char *const fmt) \
+{ \
+ type num; \
+ if (umove_or_printaddr(tcp, addr, &num)) \
+ return false; \
+ tprints("["); \
+ tprintf(fmt, num); \
+ tprints("]"); \
+ return true; \
+}
- if (!addr) {
- tprints("NULL");
- return;
- }
- if (umove(tcp, addr, &num) < 0) {
- tprintf("%#lx", addr);
- return;
+#define DEF_PRINTPAIR(name, type) \
+bool \
+printpair_ ## name(struct tcb *const tcp, const kernel_ulong_t addr, \
+ const char *const fmt) \
+{ \
+ type pair[2]; \
+ if (umove_or_printaddr(tcp, addr, &pair)) \
+ return false; \
+ tprints("["); \
+ tprintf(fmt, pair[0]); \
+ tprints(", "); \
+ tprintf(fmt, pair[1]); \
+ tprints("]"); \
+ return true; \
+}
+
+DEF_PRINTNUM(int, int)
+DEF_PRINTPAIR(int, int)
+DEF_PRINTNUM(short, short)
+DEF_PRINTNUM(int64, uint64_t)
+DEF_PRINTPAIR(int64, uint64_t)
+
+#if SUPPORTED_PERSONALITIES > 1 && SIZEOF_LONG > 4
+bool
+printnum_long_int(struct tcb *const tcp, const kernel_ulong_t addr,
+ const char *const fmt_long, const char *const fmt_int)
+{
+ if (current_wordsize > sizeof(int)) {
+ return printnum_int64(tcp, addr, fmt_long);
+ } else {
+ return printnum_int(tcp, addr, fmt_int);
}
- tprints("[");
- tprintf(fmt, num);
- tprints("]");
}
+#endif
const char *
sprinttime(time_t t)
{
struct tm *tmp;
- static char buf[sizeof(int) * 3 * 6];
+ static char buf[sizeof(int) * 3 * 6 + sizeof("+0000")];
if (t == 0) {
strcpy(buf, "0");
}
tmp = localtime(&t);
if (tmp)
- snprintf(buf, sizeof buf, "%02d/%02d/%02d-%02d:%02d:%02d",
- tmp->tm_year + 1900, tmp->tm_mon + 1, tmp->tm_mday,
- tmp->tm_hour, tmp->tm_min, tmp->tm_sec);
+ strftime(buf, sizeof(buf), "%FT%T%z", tmp);
else
- snprintf(buf, sizeof buf, "%lu", (unsigned long) t);
+ snprintf(buf, sizeof(buf), "%lu", (unsigned long) t);
return buf;
}
-static char *
-getfdproto(struct tcb *tcp, int fd, char *buf, unsigned bufsize)
+enum sock_proto
+getfdproto(struct tcb *tcp, int fd)
{
-#if HAVE_SYS_XATTR_H
+#ifdef HAVE_SYS_XATTR_H
+ size_t bufsize = 256;
+ char buf[bufsize];
ssize_t r;
char path[sizeof("/proc/%u/fd/%u") + 2 * sizeof(int)*3];
if (fd < 0)
- return NULL;
+ return SOCK_PROTO_UNKNOWN;
sprintf(path, "/proc/%u/fd/%u", tcp->pid, fd);
r = getxattr(path, "system.sockprotoname", buf, bufsize - 1);
if (r <= 0)
- return NULL;
+ return SOCK_PROTO_UNKNOWN;
else {
/*
* This is a protection for the case when the kernel
* side does not append a null byte to the buffer.
*/
buf[r] = '\0';
- return buf;
+
+ return get_proto_by_name(buf);
}
#else
- return NULL;
+ return SOCK_PROTO_UNKNOWN;
#endif
}
if (show_fd_path && getfdpath(tcp, fd, path, sizeof(path)) >= 0) {
static const char socket_prefix[] = "socket:[";
const size_t socket_prefix_len = sizeof(socket_prefix) - 1;
- size_t path_len;
+ const size_t path_len = strlen(path);
+ tprintf("%d<", fd);
if (show_fd_path > 1 &&
strncmp(path, socket_prefix, socket_prefix_len) == 0 &&
- path[(path_len = strlen(path)) - 1] == ']') {
- unsigned long inodenr;
-#define PROTO_NAME_LEN 32
- char proto_buf[PROTO_NAME_LEN];
- const char *proto =
- getfdproto(tcp, fd, proto_buf, PROTO_NAME_LEN);
- inodenr = strtoul(path + socket_prefix_len, NULL, 10);
- tprintf("%d<", fd);
- if (!print_sockaddr_by_inode(inodenr, proto)) {
- if (proto)
- tprintf("%s:[%lu]", proto, inodenr);
- else
+ path[path_len - 1] == ']') {
+ unsigned long inode =
+ strtoul(path + socket_prefix_len, NULL, 10);
+
+ if (!print_sockaddr_by_inode_cached(inode)) {
+ const enum sock_proto proto =
+ getfdproto(tcp, fd);
+ if (!print_sockaddr_by_inode(inode, proto))
tprints(path);
}
- tprints(">");
} else {
- tprintf("%d<%s>", fd, path);
+ print_quoted_string(path, path_len,
+ QUOTE_OMIT_LEADING_TRAILING_QUOTES);
}
+ tprints(">");
} else
tprintf("%d", fd);
}
/*
* Quote string `instr' of length `size'
* Write up to (3 + `size' * 4) bytes to `outstr' buffer.
- * If `len' is -1, treat `instr' as a NUL-terminated string
- * and quote at most (`size' - 1) bytes.
*
- * Returns 0 if len == -1 and NUL was seen, 1 otherwise.
- * Note that if len >= 0, always returns 1.
+ * If QUOTE_0_TERMINATED `style' flag is set,
+ * treat `instr' as a NUL-terminated string,
+ * checking up to (`size' + 1) bytes of `instr'.
+ *
+ * If QUOTE_OMIT_LEADING_TRAILING_QUOTES `style' flag is set,
+ * do not add leading and trailing quoting symbols.
+ *
+ * Returns 0 if QUOTE_0_TERMINATED is set and NUL was seen, 1 otherwise.
+ * Note that if QUOTE_0_TERMINATED is not set, always returns 1.
*/
int
-string_quote(const char *instr, char *outstr, long len, int size)
+string_quote(const char *instr, char *outstr, const unsigned int size,
+ const unsigned int style)
{
const unsigned char *ustr = (const unsigned char *) instr;
char *s = outstr;
- int usehex, c, i, eol;
+ unsigned int i;
+ int usehex, c, eol;
- eol = 0x100; /* this can never match a char */
- if (len == -1) {
- size--;
+ if (style & QUOTE_0_TERMINATED)
eol = '\0';
- }
+ else
+ eol = 0x100; /* this can never match a char */
usehex = 0;
if (xflag > 1)
}
}
- *s++ = '\"';
+ if (!(style & QUOTE_OMIT_LEADING_TRAILING_QUOTES))
+ *s++ = '\"';
if (usehex) {
/* Hex-quote the whole string. */
/* Check for NUL-terminated string. */
if (c == eol)
goto asciz_ended;
+ if ((i == (size - 1)) &&
+ (style & QUOTE_OMIT_TRAILING_0) && (c == '\0'))
+ goto asciz_ended;
switch (c) {
case '\"': case '\\':
*s++ = '\\';
}
}
- *s++ = '\"';
+ if (!(style & QUOTE_OMIT_LEADING_TRAILING_QUOTES))
+ *s++ = '\"';
*s = '\0';
/* Return zero if we printed entire ASCIZ string (didn't truncate it) */
- if (len == -1 && ustr[i] == '\0') {
+ if (style & QUOTE_0_TERMINATED && ustr[i] == '\0') {
/* We didn't see NUL yet (otherwise we'd jump to 'asciz_ended')
* but next char is NUL.
*/
return 1;
asciz_ended:
- *s++ = '\"';
+ if (!(style & QUOTE_OMIT_LEADING_TRAILING_QUOTES))
+ *s++ = '\"';
*s = '\0';
/* Return zero: we printed entire ASCIZ string (didn't truncate it) */
return 0;
}
+#ifndef ALLOCA_CUTOFF
+# define ALLOCA_CUTOFF 4032
+#endif
+#define use_alloca(n) ((n) <= ALLOCA_CUTOFF)
+
+/*
+ * Quote string `str' of length `size' and print the result.
+ *
+ * If QUOTE_0_TERMINATED `style' flag is set,
+ * treat `str' as a NUL-terminated string and
+ * quote at most (`size' - 1) bytes.
+ *
+ * If QUOTE_OMIT_LEADING_TRAILING_QUOTES `style' flag is set,
+ * do not add leading and trailing quoting symbols.
+ *
+ * Returns 0 if QUOTE_0_TERMINATED is set and NUL was seen, 1 otherwise.
+ * Note that if QUOTE_0_TERMINATED is not set, always returns 1.
+ */
+int
+print_quoted_string(const char *str, unsigned int size,
+ const unsigned int style)
+{
+ char *buf;
+ char *outstr;
+ unsigned int alloc_size;
+ int rc;
+
+ if (size && style & QUOTE_0_TERMINATED)
+ --size;
+
+ alloc_size = 4 * size;
+ if (alloc_size / 4 != size) {
+ error_msg("Out of memory");
+ tprints("???");
+ return -1;
+ }
+ alloc_size += 1 + (style & QUOTE_OMIT_LEADING_TRAILING_QUOTES ? 0 : 2);
+
+ if (use_alloca(alloc_size)) {
+ outstr = alloca(alloc_size);
+ buf = NULL;
+ } else {
+ outstr = buf = malloc(alloc_size);
+ if (!buf) {
+ error_msg("Out of memory");
+ tprints("???");
+ return -1;
+ }
+ }
+
+ rc = string_quote(str, outstr, size, style);
+ tprints(outstr);
+
+ free(buf);
+ return rc;
+}
+
/*
* Print path string specified by address `addr' and length `n'.
* If path length exceeds `n', append `...' to the output.
*/
void
-printpathn(struct tcb *tcp, long addr, unsigned int n)
+printpathn(struct tcb *const tcp, const kernel_ulong_t addr, unsigned int n)
{
char path[PATH_MAX + 1];
int nul_seen;
/* Fetch one byte more to find out whether path length > n. */
nul_seen = umovestr(tcp, addr, n + 1, path);
if (nul_seen < 0)
- tprintf("%#lx", addr);
+ printaddr(addr);
else {
- char *outstr;
-
- path[n] = '\0';
- n++;
- outstr = alloca(4 * n); /* 4*(n-1) + 3 for quotes and NUL */
- string_quote(path, outstr, -1, n);
- tprints(outstr);
+ path[n++] = '\0';
+ print_quoted_string(path, n, QUOTE_0_TERMINATED);
if (!nul_seen)
tprints("...");
}
}
void
-printpath(struct tcb *tcp, long addr)
+printpath(struct tcb *const tcp, const kernel_ulong_t addr)
{
/* Size must correspond to char path[] size in printpathn */
printpathn(tcp, addr, PATH_MAX);
/*
* Print string specified by address `addr' and length `len'.
- * If `len' < 0, treat the string as a NUL-terminated string.
- * If string length exceeds `max_strlen', append `...' to the output.
+ * If `user_style' has QUOTE_0_TERMINATED bit set, treat the string
+ * as a NUL-terminated string.
+ * Pass `user_style' on to `string_quote'.
+ * Append `...' to the output if either the string length exceeds `max_strlen',
+ * or QUOTE_0_TERMINATED bit is set and the string length exceeds `len'.
*/
void
-printstr(struct tcb *tcp, long addr, long len)
+printstr_ex(struct tcb *const tcp, const kernel_ulong_t addr,
+ const kernel_ulong_t len, const unsigned int user_style)
{
static char *str = NULL;
static char *outstr;
unsigned int size;
+ unsigned int style = user_style;
+ int rc;
int ellipsis;
if (!addr) {
if (outstr_size / 4 != max_strlen)
die_out_of_memory();
- str = malloc(max_strlen + 1);
- if (!str)
- die_out_of_memory();
- outstr = malloc(outstr_size);
- if (!outstr)
- die_out_of_memory();
+ str = xmalloc(max_strlen + 1);
+ outstr = xmalloc(outstr_size);
}
- if (len == -1) {
- /*
- * Treat as a NUL-terminated string: fetch one byte more
- * because string_quote() quotes one byte less.
- */
- size = max_strlen + 1;
- if (umovestr(tcp, addr, size, str) < 0) {
- tprintf("%#lx", addr);
- return;
- }
+ /* Fetch one byte more because string_quote may look one byte ahead. */
+ size = max_strlen + 1;
+
+ if (size > len)
+ size = len;
+ if (style & QUOTE_0_TERMINATED)
+ rc = umovestr(tcp, addr, size, str);
+ else
+ rc = umoven(tcp, addr, size, str);
+
+ if (rc < 0) {
+ printaddr(addr);
+ return;
}
- else {
+
+ if (size > max_strlen)
size = max_strlen;
- if (size > (unsigned long)len)
- size = (unsigned long)len;
- if (umoven(tcp, addr, size, str) < 0) {
- tprintf("%#lx", addr);
- return;
- }
- }
+ else
+ str[size] = '\xff';
/* If string_quote didn't see NUL and (it was supposed to be ASCIZ str
* or we were requested to print more than -s NUM chars)...
*/
- ellipsis = (string_quote(str, outstr, len, size) &&
- (len < 0 || (unsigned long) len > max_strlen));
+ ellipsis = string_quote(str, outstr, size, style)
+ && len
+ && ((style & QUOTE_0_TERMINATED)
+ || len > max_strlen);
tprints(outstr);
if (ellipsis)
}
void
-dumpiov(struct tcb *tcp, int len, long addr)
+dumpiov_upto(struct tcb *const tcp, const int len, const kernel_ulong_t addr,
+ kernel_ulong_t data_size)
{
#if SUPPORTED_PERSONALITIES > 1
union {
- struct { u_int32_t base; u_int32_t len; } *iov32;
- struct { u_int64_t base; u_int64_t len; } *iov64;
+ struct { uint32_t base; uint32_t len; } *iov32;
+ struct { uint64_t base; uint64_t len; } *iov64;
} iovu;
#define iov iovu.iov64
#define sizeof_iov \
#else
struct iovec *iov;
#define sizeof_iov sizeof(*iov)
-#define iov_iov_base(i) iov[i].iov_base
+#define iov_iov_base(i) ptr_to_kulong(iov[i].iov_base)
#define iov_iov_len(i) iov[i].iov_len
#endif
int i;
/* Assuming no sane program has millions of iovs */
if ((unsigned)len > 1024*1024 /* insane or negative size? */
|| (iov = malloc(size)) == NULL) {
- fprintf(stderr, "Out of memory\n");
+ error_msg("Out of memory");
return;
}
- if (umoven(tcp, addr, size, (char *) iov) >= 0) {
+ if (umoven(tcp, addr, size, iov) >= 0) {
for (i = 0; i < len; i++) {
+ kernel_ulong_t iov_len = iov_iov_len(i);
+ if (iov_len > data_size)
+ iov_len = data_size;
+ if (!iov_len)
+ break;
+ data_size -= iov_len;
/* include the buffer number to make it easy to
* match up the trace with the source */
- tprintf(" * %lu bytes in buffer %d\n",
- (unsigned long)iov_iov_len(i), i);
- dumpstr(tcp, (long) iov_iov_base(i),
- iov_iov_len(i));
+ tprintf(" * %" PRI_klu " bytes in buffer %d\n", iov_len, i);
+ dumpstr(tcp, iov_iov_base(i), iov_len);
}
}
free(iov);
}
void
-dumpstr(struct tcb *tcp, long addr, int len)
+dumpstr(struct tcb *const tcp, const kernel_ulong_t addr, const int len)
{
static int strsize = -1;
static unsigned char *str;
str = malloc(len + 16);
if (!str) {
strsize = -1;
- fprintf(stderr, "Out of memory\n");
+ error_msg("Out of memory");
return;
}
strsize = len + 16;
}
- if (umoven(tcp, addr, len, (char *) str) < 0)
+ if (umoven(tcp, addr, len, str) < 0)
return;
/* Space-pad to 16 bytes */
#endif /* end of hack */
-#define PAGMASK (~(PAGSIZ - 1))
+static ssize_t
+vm_read_mem(const pid_t pid, void *const laddr,
+ const kernel_ulong_t raddr, const size_t len)
+{
+ const unsigned long truncated_raddr = raddr;
+
+ if (raddr != (kernel_ulong_t) truncated_raddr) {
+ errno = EIO;
+ return -1;
+ }
+
+ const struct iovec local = {
+ .iov_base = laddr,
+ .iov_len = len
+ };
+ const struct iovec remote = {
+ .iov_base = (void *) truncated_raddr,
+ .iov_len = len
+ };
+
+ return process_vm_readv(pid, &local, 1, &remote, 1, 0);
+}
+
/*
* move `len' bytes of data from process `pid'
- * at address `addr' to our space at `laddr'
+ * at address `addr' to our space at `our_addr'
*/
int
-umoven(struct tcb *tcp, long addr, unsigned int len, char *laddr)
+umoven(struct tcb *const tcp, kernel_ulong_t addr, unsigned int len,
+ void *const our_addr)
{
+ char *laddr = our_addr;
int pid = tcp->pid;
unsigned int n, m, nread;
union {
#endif
if (!process_vm_readv_not_supported) {
- struct iovec local[1], remote[1];
- int r;
-
- local[0].iov_base = laddr;
- remote[0].iov_base = (void*)addr;
- local[0].iov_len = remote[0].iov_len = len;
- r = process_vm_readv(pid, local, 1, remote, 1, 0);
+ int r = vm_read_mem(pid, laddr, addr, len);
if ((unsigned int) r == len)
return 0;
if (r >= 0) {
- error_msg("umoven: short read (%u < %u) @0x%lx",
+ error_msg("umoven: short read (%u < %u) @0x%" PRI_klx,
(unsigned int) r, len, addr);
return -1;
}
case ENOSYS:
process_vm_readv_not_supported = 1;
break;
+ case EPERM:
+ /* operation not permitted, try PTRACE_PEEKDATA */
+ break;
case ESRCH:
/* the process is gone */
return -1;
- case EFAULT: case EIO: case EPERM:
+ case EFAULT: case EIO:
/* address space is inaccessible */
return -1;
default:
n = addr & (sizeof(long) - 1); /* residue */
addr &= -sizeof(long); /* aligned address */
errno = 0;
- u.val = ptrace(PTRACE_PEEKDATA, pid, (char *) addr, 0);
+ u.val = ptrace(PTRACE_PEEKDATA, pid, addr, 0);
switch (errno) {
case 0:
break;
return -1;
default:
/* all the rest is strange and should be reported */
- perror_msg("umoven: PTRACE_PEEKDATA pid:%d @0x%lx",
+ perror_msg("umoven: PTRACE_PEEKDATA pid:%d @0x%" PRI_klx,
pid, addr);
return -1;
}
}
while (len) {
errno = 0;
- u.val = ptrace(PTRACE_PEEKDATA, pid, (char *) addr, 0);
+ u.val = ptrace(PTRACE_PEEKDATA, pid, addr, 0);
switch (errno) {
case 0:
break;
case EFAULT: case EIO: case EPERM:
/* address space is inaccessible */
if (nread) {
- perror_msg("umoven: short read (%u < %u) @0x%lx",
+ perror_msg("umoven: short read (%u < %u) @0x%" PRI_klx,
nread, nread + len, addr - nread);
}
return -1;
default:
/* all the rest is strange and should be reported */
- perror_msg("umoven: PTRACE_PEEKDATA pid:%d @0x%lx",
+ perror_msg("umoven: PTRACE_PEEKDATA pid:%d @0x%" PRI_klx,
pid, addr);
return -1;
}
return 0;
}
+int
+umoven_or_printaddr(struct tcb *const tcp, const kernel_ulong_t addr,
+ const unsigned int len, void *const our_addr)
+{
+ if (!addr || !verbose(tcp) || (exiting(tcp) && syserror(tcp)) ||
+ umoven(tcp, addr, len, our_addr) < 0) {
+ printaddr(addr);
+ return -1;
+ }
+ return 0;
+}
+
+int
+umoven_or_printaddr_ignore_syserror(struct tcb *const tcp,
+ const kernel_ulong_t addr,
+ const unsigned int len,
+ void *const our_addr)
+{
+ if (!addr || !verbose(tcp) || umoven(tcp, addr, len, our_addr) < 0) {
+ printaddr(addr);
+ return -1;
+ }
+ return 0;
+}
+
/*
* Like `umove' but make the additional effort of looking
* for a terminating zero byte.
* we never write past laddr[len-1]).
*/
int
-umovestr(struct tcb *tcp, long addr, unsigned int len, char *laddr)
+umovestr(struct tcb *const tcp, kernel_ulong_t addr, unsigned int len, char *laddr)
{
-#if SIZEOF_LONG == 4
- const unsigned long x01010101 = 0x01010101ul;
- const unsigned long x80808080 = 0x80808080ul;
-#elif SIZEOF_LONG == 8
- const unsigned long x01010101 = 0x0101010101010101ul;
- const unsigned long x80808080 = 0x8080808080808080ul;
-#else
-# error SIZEOF_LONG > 8
-#endif
+ const unsigned long x01010101 = (unsigned long) 0x0101010101010101ULL;
+ const unsigned long x80808080 = (unsigned long) 0x8080808080808080ULL;
int pid = tcp->pid;
unsigned int n, m, nread;
nread = 0;
if (!process_vm_readv_not_supported) {
- struct iovec local[1], remote[1];
-
- local[0].iov_base = laddr;
- remote[0].iov_base = (void*)addr;
+ const size_t page_size = get_pagesize();
+ const size_t page_mask = page_size - 1;
while (len > 0) {
unsigned int chunk_len;
unsigned int end_in_page;
- int r;
- /* Don't read kilobytes: most strings are short */
- chunk_len = len;
- if (chunk_len > 256)
- chunk_len = 256;
- /* Don't cross pages. I guess otherwise we can get EFAULT
+ /*
+ * Don't cross pages, otherwise we can get EFAULT
* and fail to notice that terminating NUL lies
* in the existing (first) page.
- * (I hope there aren't arches with pages < 4K)
*/
- end_in_page = ((addr + chunk_len) & 4095);
+ chunk_len = len > page_size ? page_size : len;
+ end_in_page = (addr + chunk_len) & page_mask;
if (chunk_len > end_in_page) /* crosses to the next page */
chunk_len -= end_in_page;
- local[0].iov_len = remote[0].iov_len = chunk_len;
- r = process_vm_readv(pid, local, 1, remote, 1, 0);
+ int r = vm_read_mem(pid, laddr, addr, chunk_len);
if (r > 0) {
- if (memchr(local[0].iov_base, '\0', r))
+ if (memchr(laddr, '\0', r))
return 1;
- local[0].iov_base += r;
- remote[0].iov_base += r;
- len -= r;
+ addr += r;
+ laddr += r;
nread += r;
+ len -= r;
continue;
}
switch (errno) {
case ESRCH:
/* the process is gone */
return -1;
- case EFAULT: case EIO: case EPERM:
+ case EPERM:
+ /* operation not permitted, try PTRACE_PEEKDATA */
+ if (!nread)
+ goto vm_readv_didnt_work;
+ /* fall through */
+ case EFAULT: case EIO:
/* address space is inaccessible */
if (nread) {
- perror_msg("umovestr: short read (%d < %d) @0x%lx",
- nread, nread + len, addr);
+ perror_msg("umovestr: short read (%d < %d) @0x%" PRI_klx,
+ nread, nread + len, addr - nread);
}
return -1;
default:
n = addr & (sizeof(long) - 1); /* residue */
addr &= -sizeof(long); /* aligned address */
errno = 0;
- u.val = ptrace(PTRACE_PEEKDATA, pid, (char *)addr, 0);
+ u.val = ptrace(PTRACE_PEEKDATA, pid, addr, 0);
switch (errno) {
case 0:
break;
return -1;
default:
/* all the rest is strange and should be reported */
- perror_msg("umovestr: PTRACE_PEEKDATA pid:%d @0x%lx",
+ perror_msg("umovestr: PTRACE_PEEKDATA pid:%d @0x%" PRI_klx,
pid, addr);
return -1;
}
while (len) {
errno = 0;
- u.val = ptrace(PTRACE_PEEKDATA, pid, (char *)addr, 0);
+ u.val = ptrace(PTRACE_PEEKDATA, pid, addr, 0);
switch (errno) {
case 0:
break;
case EFAULT: case EIO: case EPERM:
/* address space is inaccessible */
if (nread) {
- perror_msg("umovestr: short read (%d < %d) @0x%lx",
+ perror_msg("umovestr: short read (%d < %d) @0x%" PRI_klx,
nread, nread + len, addr - nread);
}
return -1;
default:
/* all the rest is strange and should be reported */
- perror_msg("umovestr: PTRACE_PEEKDATA pid:%d @0x%lx",
+ perror_msg("umovestr: PTRACE_PEEKDATA pid:%d @0x%" PRI_klx,
pid, addr);
return -1;
}
return 0;
}
-int
-upeek(int pid, long off, long *res)
-{
- long val;
-
- errno = 0;
- val = ptrace(PTRACE_PEEKUSER, (pid_t)pid, (char *) off, 0);
- if (val == -1 && errno) {
- if (errno != ESRCH) {
- perror_msg("upeek: PTRACE_PEEKUSER pid:%d @0x%lx)", pid, off);
- }
- return -1;
- }
- *res = val;
- return 0;
-}
-
-/* Note! On new kernels (about 2.5.46+), we use PTRACE_O_TRACECLONE
- * and PTRACE_O_TRACE[V]FORK for tracing children.
- * If you are adding a new arch which is only supported by newer kernels,
- * you most likely don't need to add any code below
- * beside a dummy "return 0" block in change_syscall().
- */
-
/*
- * These #if's are huge, please indent them correctly.
- * It's easy to get confused otherwise.
+ * Iteratively fetch and print up to nmemb elements of elem_size size
+ * from the array that starts at tracee's address start_addr.
+ *
+ * Array elements are being fetched to the address specified by elem_buf.
+ *
+ * The fetcher callback function specified by umoven_func should follow
+ * the same semantics as umoven_or_printaddr function.
+ *
+ * The printer callback function specified by print_func is expected
+ * to print something; if it returns false, no more iterations will be made.
+ *
+ * The pointer specified by opaque_data is passed to each invocation
+ * of print_func callback function.
+ *
+ * This function prints:
+ * - "NULL", if start_addr is NULL;
+ * - "[]", if nmemb is 0;
+ * - start_addr, if nmemb * elem_size overflows or wraps around;
+ * - nothing, if the first element cannot be fetched
+ * (if umoven_func returns non-zero), but it is assumed that
+ * umoven_func has printed the address it failed to fetch data from;
+ * - elements of the array, delimited by ", ", with the array itself
+ * enclosed with [] brackets.
+ *
+ * If abbrev(tcp) is true, then
+ * - the maximum number of elements printed equals to max_strlen;
+ * - "..." is printed instead of max_strlen+1 element
+ * and no more iterations will be made.
+ *
+ * This function returns true only if
+ * - umoven_func has been called at least once AND
+ * - umoven_func has not returned false.
*/
-
-#include "syscall.h"
-
-#ifndef CLONE_PTRACE
-# define CLONE_PTRACE 0x00002000
-#endif
-#ifndef CLONE_VFORK
-# define CLONE_VFORK 0x00004000
-#endif
-#ifndef CLONE_VM
-# define CLONE_VM 0x00000100
-#endif
-
-#ifdef IA64
-
-typedef unsigned long *arg_setup_state;
-
-static int
-arg_setup(struct tcb *tcp, arg_setup_state *state)
+bool
+print_array(struct tcb *const tcp,
+ const kernel_ulong_t start_addr,
+ const size_t nmemb,
+ void *const elem_buf,
+ const size_t elem_size,
+ int (*const umoven_func)(struct tcb *,
+ kernel_ulong_t,
+ unsigned int,
+ void *),
+ bool (*const print_func)(struct tcb *,
+ void *elem_buf,
+ size_t elem_size,
+ void *opaque_data),
+ void *const opaque_data)
{
- unsigned long cfm, sof, sol;
- long bsp;
+ if (!start_addr) {
+ tprints("NULL");
+ return false;
+ }
- if (ia64_ia32mode) {
- /* Satisfy a false GCC warning. */
- *state = NULL;
- return 0;
+ if (!nmemb) {
+ tprints("[]");
+ return false;
}
- if (upeek(tcp->pid, PT_AR_BSP, &bsp) < 0)
- return -1;
- if (upeek(tcp->pid, PT_CFM, (long *) &cfm) < 0)
- return -1;
+ const size_t size = nmemb * elem_size;
+ const kernel_ulong_t end_addr = start_addr + size;
- sof = (cfm >> 0) & 0x7f;
- sol = (cfm >> 7) & 0x7f;
- bsp = (long) ia64_rse_skip_regs((unsigned long *) bsp, -sof + sol);
+ if (end_addr <= start_addr || size / elem_size != nmemb) {
+ printaddr(start_addr);
+ return false;
+ }
- *state = (unsigned long *) bsp;
- return 0;
-}
+ const kernel_ulong_t abbrev_end =
+ (abbrev(tcp) && max_strlen < nmemb) ?
+ start_addr + elem_size * max_strlen : end_addr;
+ kernel_ulong_t cur;
-# define arg_finish_change(tcp, state) 0
+ for (cur = start_addr; cur < end_addr; cur += elem_size) {
+ if (cur != start_addr)
+ tprints(", ");
-static int
-get_arg0(struct tcb *tcp, arg_setup_state *state, long *valp)
-{
- int ret;
+ if (umoven_func(tcp, cur, elem_size, elem_buf))
+ break;
- if (ia64_ia32mode)
- ret = upeek(tcp->pid, PT_R11, valp);
- else
- ret = umoven(tcp,
- (unsigned long) ia64_rse_skip_regs(*state, 0),
- sizeof(long), (void *) valp);
- return ret;
-}
+ if (cur == start_addr)
+ tprints("[");
-static int
-get_arg1(struct tcb *tcp, arg_setup_state *state, long *valp)
-{
- int ret;
-
- if (ia64_ia32mode)
- ret = upeek(tcp->pid, PT_R9, valp);
- else
- ret = umoven(tcp,
- (unsigned long) ia64_rse_skip_regs(*state, 1),
- sizeof(long), (void *) valp);
- return ret;
-}
+ if (cur >= abbrev_end) {
+ tprints("...");
+ cur = end_addr;
+ break;
+ }
-static int
-set_arg0(struct tcb *tcp, arg_setup_state *state, long val)
-{
- int req = PTRACE_POKEDATA;
- void *ap;
+ if (!print_func(tcp, elem_buf, elem_size, opaque_data)) {
+ cur = end_addr;
+ break;
+ }
+ }
+ if (cur != start_addr)
+ tprints("]");
- if (ia64_ia32mode) {
- ap = (void *) (intptr_t) PT_R11; /* r11 == EBX */
- req = PTRACE_POKEUSER;
- } else
- ap = ia64_rse_skip_regs(*state, 0);
- errno = 0;
- ptrace(req, tcp->pid, ap, val);
- return errno ? -1 : 0;
+ return cur >= end_addr;
}
-static int
-set_arg1(struct tcb *tcp, arg_setup_state *state, long val)
+int
+printargs(struct tcb *tcp)
{
- int req = PTRACE_POKEDATA;
- void *ap;
-
- if (ia64_ia32mode) {
- ap = (void *) (intptr_t) PT_R9; /* r9 == ECX */
- req = PTRACE_POKEUSER;
- } else
- ap = ia64_rse_skip_regs(*state, 1);
- errno = 0;
- ptrace(req, tcp->pid, ap, val);
- return errno ? -1 : 0;
+ const int n = tcp->s_ent->nargs;
+ int i;
+ for (i = 0; i < n; ++i)
+ tprintf("%s%#" PRI_klx, i ? ", " : "", tcp->u_arg[i]);
+ return RVAL_DECODED;
}
-/* ia64 does not return the input arguments from functions (and syscalls)
- according to ia64 RSE (Register Stack Engine) behavior. */
-
-# define restore_arg0(tcp, state, val) ((void) (state), 0)
-# define restore_arg1(tcp, state, val) ((void) (state), 0)
-
-#elif defined(SPARC) || defined(SPARC64)
-
-# if defined(SPARC64)
-# undef PTRACE_GETREGS
-# define PTRACE_GETREGS PTRACE_GETREGS64
-# undef PTRACE_SETREGS
-# define PTRACE_SETREGS PTRACE_SETREGS64
-# endif
-
-typedef struct pt_regs arg_setup_state;
-
-# define arg_setup(tcp, state) \
- (ptrace(PTRACE_GETREGS, (tcp)->pid, (char *) (state), 0))
-# define arg_finish_change(tcp, state) \
- (ptrace(PTRACE_SETREGS, (tcp)->pid, (char *) (state), 0))
-
-# define get_arg0(tcp, state, valp) (*(valp) = (state)->u_regs[U_REG_O0], 0)
-# define get_arg1(tcp, state, valp) (*(valp) = (state)->u_regs[U_REG_O1], 0)
-# define set_arg0(tcp, state, val) ((state)->u_regs[U_REG_O0] = (val), 0)
-# define set_arg1(tcp, state, val) ((state)->u_regs[U_REG_O1] = (val), 0)
-# define restore_arg0(tcp, state, val) 0
-
-#else /* other architectures */
-
-# if defined S390 || defined S390X
-/* Note: this is only true for the `clone' system call, which handles
- arguments specially. We could as well say that its first two arguments
- are swapped relative to other architectures, but that would just be
- another #ifdef in the calls. */
-# define arg0_offset PT_GPR3
-# define arg1_offset PT_ORIGGPR2
-# define restore_arg0(tcp, state, val) ((void) (state), 0)
-# define restore_arg1(tcp, state, val) ((void) (state), 0)
-# define arg0_index 1
-# define arg1_index 0
-# elif defined(ALPHA) || defined(MIPS)
-# define arg0_offset REG_A0
-# define arg1_offset (REG_A0+1)
-# elif defined(POWERPC)
-# define arg0_offset (sizeof(unsigned long)*PT_R3)
-# define arg1_offset (sizeof(unsigned long)*PT_R4)
-# define restore_arg0(tcp, state, val) ((void) (state), 0)
-# elif defined(HPPA)
-# define arg0_offset PT_GR26
-# define arg1_offset (PT_GR26-4)
-# elif defined(X86_64) || defined(X32)
-# define arg0_offset ((long)(8*(current_personality ? RBX : RDI)))
-# define arg1_offset ((long)(8*(current_personality ? RCX : RSI)))
-# elif defined(SH)
-# define arg0_offset (4*(REG_REG0+4))
-# define arg1_offset (4*(REG_REG0+5))
-# elif defined(SH64)
- /* ABI defines arg0 & 1 in r2 & r3 */
-# define arg0_offset (REG_OFFSET+16)
-# define arg1_offset (REG_OFFSET+24)
-# define restore_arg0(tcp, state, val) 0
-# elif defined CRISV10 || defined CRISV32
-# define arg0_offset (4*PT_R11)
-# define arg1_offset (4*PT_ORIG_R10)
-# define restore_arg0(tcp, state, val) 0
-# define restore_arg1(tcp, state, val) 0
-# define arg0_index 1
-# define arg1_index 0
-# else
-# define arg0_offset 0
-# define arg1_offset 4
-# if defined ARM
-# define restore_arg0(tcp, state, val) 0
-# endif
-# endif
-
-typedef int arg_setup_state;
-
-# define arg_setup(tcp, state) (0)
-# define arg_finish_change(tcp, state) 0
-# define get_arg0(tcp, cookie, valp) (upeek((tcp)->pid, arg0_offset, (valp)))
-# define get_arg1(tcp, cookie, valp) (upeek((tcp)->pid, arg1_offset, (valp)))
-
-static int
-set_arg0(struct tcb *tcp, void *cookie, long val)
+int
+printargs_u(struct tcb *tcp)
{
- return ptrace(PTRACE_POKEUSER, tcp->pid, (char*)arg0_offset, val);
+ const int n = tcp->s_ent->nargs;
+ int i;
+ for (i = 0; i < n; ++i)
+ tprintf("%s%u", i ? ", " : "",
+ (unsigned int) tcp->u_arg[i]);
+ return RVAL_DECODED;
}
-static int
-set_arg1(struct tcb *tcp, void *cookie, long val)
+int
+printargs_d(struct tcb *tcp)
{
- return ptrace(PTRACE_POKEUSER, tcp->pid, (char*)arg1_offset, val);
+ const int n = tcp->s_ent->nargs;
+ int i;
+ for (i = 0; i < n; ++i)
+ tprintf("%s%d", i ? ", " : "",
+ (int) tcp->u_arg[i]);
+ return RVAL_DECODED;
}
-#endif /* architectures */
-
-#ifndef restore_arg0
-# define restore_arg0(tcp, state, val) set_arg0((tcp), (state), (val))
-#endif
-#ifndef restore_arg1
-# define restore_arg1(tcp, state, val) set_arg1((tcp), (state), (val))
-#endif
-
-#ifndef arg0_index
-# define arg0_index 0
-# define arg1_index 1
-#endif
-
-static int
-change_syscall(struct tcb *tcp, arg_setup_state *state, int new)
-{
-#if defined(I386)
- if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(ORIG_EAX * 4), new) < 0)
- return -1;
- return 0;
-#elif defined(X86_64)
- if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(ORIG_RAX * 8), new) < 0)
- return -1;
- return 0;
-#elif defined(X32)
- /* setbpt/clearbpt never used: */
- /* X32 is only supported since about linux-3.0.30 */
-#elif defined(POWERPC)
- if (ptrace(PTRACE_POKEUSER, tcp->pid,
- (char*)(sizeof(unsigned long)*PT_R0), new) < 0)
- return -1;
- return 0;
-#elif defined(S390) || defined(S390X)
- /* s390 linux after 2.4.7 has a hook in entry.S to allow this */
- if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(PT_GPR2), new) < 0)
- return -1;
- return 0;
-#elif defined(M68K)
- if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(4*PT_ORIG_D0), new) < 0)
- return -1;
- return 0;
-#elif defined(SPARC) || defined(SPARC64)
- state->u_regs[U_REG_G1] = new;
- return 0;
-#elif defined(MIPS)
- if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(REG_V0), new) < 0)
- return -1;
- return 0;
-#elif defined(ALPHA)
- if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(REG_A3), new) < 0)
- return -1;
- return 0;
-#elif defined(AVR32)
- /* setbpt/clearbpt never used: */
- /* AVR32 is only supported since about linux-2.6.19 */
-#elif defined(BFIN)
- /* setbpt/clearbpt never used: */
- /* Blackfin is only supported since about linux-2.6.23 */
-#elif defined(IA64)
- if (ia64_ia32mode) {
- switch (new) {
- case 2:
- break; /* x86 SYS_fork */
- case SYS_clone:
- new = 120;
- break;
- default:
- fprintf(stderr, "%s: unexpected syscall %d\n",
- __FUNCTION__, new);
- return -1;
- }
- if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(PT_R1), new) < 0)
- return -1;
- } else if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(PT_R15), new) < 0)
- return -1;
- return 0;
-#elif defined(HPPA)
- if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(PT_GR20), new) < 0)
- return -1;
- return 0;
-#elif defined(SH)
- if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(4*(REG_REG0+3)), new) < 0)
- return -1;
- return 0;
-#elif defined(SH64)
- /* Top half of reg encodes the no. of args n as 0x1n.
- Assume 0 args as kernel never actually checks... */
- if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(REG_SYSCALL),
- 0x100000 | new) < 0)
- return -1;
- return 0;
-#elif defined(CRISV10) || defined(CRISV32)
- if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(4*PT_R9), new) < 0)
- return -1;
- return 0;
-#elif defined(ARM)
- /* Some kernels support this, some (pre-2.6.16 or so) don't. */
-# ifndef PTRACE_SET_SYSCALL
-# define PTRACE_SET_SYSCALL 23
-# endif
- if (ptrace(PTRACE_SET_SYSCALL, tcp->pid, 0, new & 0xffff) != 0)
- return -1;
- return 0;
-#elif defined(AARCH64)
- /* setbpt/clearbpt never used: */
- /* AARCH64 is only supported since about linux-3.0.31 */
-#elif defined(TILE)
- /* setbpt/clearbpt never used: */
- /* Tilera CPUs are only supported since about linux-2.6.34 */
-#elif defined(MICROBLAZE)
- /* setbpt/clearbpt never used: */
- /* microblaze is only supported since about linux-2.6.30 */
-#elif defined(OR1K)
- /* never reached; OR1K is only supported by kernels since 3.1.0. */
-#elif defined(METAG)
- /* setbpt/clearbpt never used: */
- /* Meta is only supported since linux-3.7 */
-#elif defined(XTENSA)
- /* setbpt/clearbpt never used: */
- /* Xtensa is only supported since linux 2.6.13 */
-#elif defined(ARC)
- /* setbpt/clearbpt never used: */
- /* ARC only supported since 3.9 */
+#if defined _LARGEFILE64_SOURCE && defined HAVE_OPEN64
+# define open_file open64
#else
-#warning Do not know how to handle change_syscall for this architecture
-#endif /* architecture */
- return -1;
-}
+# define open_file open
+#endif
int
-setbpt(struct tcb *tcp)
+read_int_from_file(const char *const fname, int *const pvalue)
{
- static int clone_scno[SUPPORTED_PERSONALITIES] = { SYS_clone };
- arg_setup_state state;
-
- if (tcp->flags & TCB_BPTSET) {
- fprintf(stderr, "PANIC: TCB already set in pid %u\n", tcp->pid);
+ const int fd = open_file(fname, O_RDONLY);
+ if (fd < 0)
return -1;
- }
- /*
- * It's a silly kludge to initialize this with a search at runtime.
- * But it's better than maintaining another magic thing in the
- * godforsaken tables.
- */
- if (clone_scno[current_personality] == 0) {
- unsigned int i;
- for (i = 0; i < nsyscalls; ++i)
- if (sysent[i].sys_func == sys_clone) {
- clone_scno[current_personality] = i;
- break;
- }
- }
+ long lval;
+ char buf[sizeof(lval) * 3];
+ int n = read(fd, buf, sizeof(buf) - 1);
+ int saved_errno = errno;
+ close(fd);
- if (tcp->s_ent->sys_func == sys_fork) {
- if (arg_setup(tcp, &state) < 0
- || get_arg0(tcp, &state, &tcp->inst[0]) < 0
- || get_arg1(tcp, &state, &tcp->inst[1]) < 0
- || change_syscall(tcp, &state,
- clone_scno[current_personality]) < 0
- || set_arg0(tcp, &state, CLONE_PTRACE|SIGCHLD) < 0
- || set_arg1(tcp, &state, 0) < 0
- || arg_finish_change(tcp, &state) < 0)
- return -1;
- tcp->u_arg[arg0_index] = CLONE_PTRACE|SIGCHLD;
- tcp->u_arg[arg1_index] = 0;
- tcp->flags |= TCB_BPTSET;
- return 0;
+ if (n < 0) {
+ errno = saved_errno;
+ return -1;
}
- if (tcp->s_ent->sys_func == sys_clone) {
- /* ia64 calls directly `clone (CLONE_VFORK | CLONE_VM)'
- contrary to x86 vfork above. Even on x86 we turn the
- vfork semantics into plain fork - each application must not
- depend on the vfork specifics according to POSIX. We would
- hang waiting for the parent resume otherwise. We need to
- clear also CLONE_VM but only in the CLONE_VFORK case as
- otherwise we would break pthread_create. */
-
- long new_arg0 = (tcp->u_arg[arg0_index] | CLONE_PTRACE);
- if (new_arg0 & CLONE_VFORK)
- new_arg0 &= ~(unsigned long)(CLONE_VFORK | CLONE_VM);
- if (arg_setup(tcp, &state) < 0
- || set_arg0(tcp, &state, new_arg0) < 0
- || arg_finish_change(tcp, &state) < 0)
- return -1;
- tcp->inst[0] = tcp->u_arg[arg0_index];
- tcp->inst[1] = tcp->u_arg[arg1_index];
- tcp->flags |= TCB_BPTSET;
- return 0;
+ buf[n] = '\0';
+ char *endptr = 0;
+ errno = 0;
+ lval = strtol(buf, &endptr, 10);
+ if (!endptr || (*endptr && '\n' != *endptr)
+#if INT_MAX < LONG_MAX
+ || lval > INT_MAX || lval < INT_MIN
+#endif
+ || ERANGE == errno) {
+ if (!errno)
+ errno = EINVAL;
+ return -1;
}
- fprintf(stderr, "PANIC: setbpt for syscall %ld on %u???\n",
- tcp->scno, tcp->pid);
- return -1;
-}
-
-int
-clearbpt(struct tcb *tcp)
-{
- arg_setup_state state;
- if (arg_setup(tcp, &state) < 0
- || change_syscall(tcp, &state, tcp->scno) < 0
- || restore_arg0(tcp, &state, tcp->inst[0]) < 0
- || restore_arg1(tcp, &state, tcp->inst[1]) < 0
- || arg_finish_change(tcp, &state))
- if (errno != ESRCH)
- return -1;
- tcp->flags &= ~TCB_BPTSET;
+ *pvalue = (int) lval;
return 0;
}
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