*/
#include "defs.h"
-#include <sys/user.h>
#include <sys/param.h>
#include <fcntl.h>
-#if HAVE_SYS_UIO_H
-# include <sys/uio.h>
+#if 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>
-# define PTRACE_PEEKUSR PTRACE_PEEKUSER
-#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
-
-/* macros */
-#ifndef MAX
-# define MAX(a,b) (((a) > (b)) ? (a) : (b))
-#endif
-#ifndef MIN
-# define MIN(a,b) (((a) < (b)) ? (a) : (b))
-#endif
+#include "regs.h"
+#include "ptrace.h"
int
string_to_uint(const char *str)
}
int
-tv_nz(struct timeval *a)
+tv_nz(const struct timeval *a)
{
return a->tv_sec || a->tv_usec;
}
int
-tv_cmp(struct timeval *a, struct timeval *b)
+tv_cmp(const struct timeval *a, const struct timeval *b)
{
if (a->tv_sec < b->tv_sec
|| (a->tv_sec == b->tv_sec && a->tv_usec < b->tv_usec))
}
double
-tv_float(struct timeval *tv)
+tv_float(const struct timeval *tv)
{
return tv->tv_sec + tv->tv_usec/1000000.0;
}
void
-tv_add(struct timeval *tv, struct timeval *a, struct timeval *b)
+tv_add(struct timeval *tv, const struct timeval *a, const struct timeval *b)
{
tv->tv_sec = a->tv_sec + b->tv_sec;
tv->tv_usec = a->tv_usec + b->tv_usec;
}
void
-tv_sub(struct timeval *tv, struct timeval *a, struct timeval *b)
+tv_sub(struct timeval *tv, const struct timeval *a, const struct timeval *b)
{
tv->tv_sec = a->tv_sec - b->tv_sec;
tv->tv_usec = a->tv_usec - b->tv_usec;
}
void
-tv_div(struct timeval *tv, struct timeval *a, int n)
+tv_div(struct timeval *tv, const struct timeval *a, int n)
{
tv->tv_usec = (a->tv_sec % n * 1000000 + a->tv_usec + n / 2) / n;
tv->tv_sec = a->tv_sec / n + tv->tv_usec / 1000000;
}
void
-tv_mul(struct timeval *tv, struct timeval *a, int n)
+tv_mul(struct timeval *tv, const struct timeval *a, int n)
{
tv->tv_usec = a->tv_usec * n;
tv->tv_sec = a->tv_sec * n + tv->tv_usec / 1000000;
}
const char *
-xlookup(const struct xlat *xlat, int val)
+xlookup(const struct xlat *xlat, const unsigned int val)
{
for (; xlat->str != NULL; xlat++)
if (xlat->val == val)
return NULL;
}
+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;
+ return (val1 > val2) ? 1 : (val1 < val2) ? -1 : 0;
+}
+
+const char *
+xlat_search(const struct xlat *xlat, const size_t nmemb, const unsigned int val)
+{
+ const struct xlat *e =
+ bsearch((const void*) (const unsigned long) val,
+ xlat, nmemb, sizeof(*xlat), xlat_bsearch_compare);
+
+ return e ? e->str : NULL;
+}
+
#if !defined HAVE_STPCPY
char *
stpcpy(char *dst, const char *src)
}
#endif
+/* Find a next bit which is set.
+ * Starts testing at cur_bit.
+ * Returns -1 if no more bits are set.
+ *
+ * We never touch bytes we don't need to.
+ * On big-endian, array is assumed to consist of
+ * current_wordsize wide words: for example, is current_wordsize is 4,
+ * the bytes are walked in 3,2,1,0, 7,6,5,4, 11,10,9,8 ... sequence.
+ * On little-endian machines, word size is immaterial.
+ */
+int
+next_set_bit(const void *bit_array, unsigned cur_bit, unsigned size_bits)
+{
+ const unsigned endian = 1;
+ int little_endian = *(char*)&endian;
+
+ const uint8_t *array = bit_array;
+ unsigned pos = cur_bit / 8;
+ unsigned pos_xor_mask = little_endian ? 0 : current_wordsize-1;
+
+ for (;;) {
+ uint8_t bitmask;
+ uint8_t cur_byte;
+
+ if (cur_bit >= size_bits)
+ return -1;
+ cur_byte = array[pos ^ pos_xor_mask];
+ if (cur_byte == 0) {
+ cur_bit = (cur_bit + 8) & (-8);
+ pos++;
+ continue;
+ }
+ bitmask = 1 << (cur_bit & 7);
+ for (;;) {
+ if (cur_byte & bitmask)
+ return cur_bit;
+ cur_bit++;
+ if (cur_bit >= size_bits)
+ return -1;
+ bitmask <<= 1;
+ /* This check *can't be* optimized out: */
+ if (bitmask == 0)
+ break;
+ }
+ pos++;
+ }
+}
/*
* Print entry in struct xlat table, if there.
*/
void
-printxval(const struct xlat *xlat, int val, const char *dflt)
+printxval(const struct xlat *xlat, const unsigned int val, const char *dflt)
{
const char *str = xlookup(xlat, val);
}
/*
- * Print 64bit argument at position arg_no and return the index of the next
- * argument.
+ * Fetch 64bit argument at position arg_no and
+ * return the index of the next argument.
*/
int
-printllval(struct tcb *tcp, const char *format, int arg_no)
+getllval(struct tcb *tcp, unsigned long long *val, int arg_no)
{
-#if defined(X86_64) || defined(POWERPC64) || defined(TILE)
- if (current_personality == 0) {
- /* Technically, format expects "long long",
- * but we supply "long". We expect that
- * on this arch, they are the same.
- */
- tprintf(format, tcp->u_arg[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 {
-# if defined(POWERPC64)
- /* Align arg_no to next even number */
+# if defined(AARCH64) || defined(POWERPC64)
+ /* Align arg_no to the next even number. */
arg_no = (arg_no + 1) & 0xe;
-# endif
- tprintf(format, LONG_LONG(tcp->u_arg[arg_no], tcp->u_arg[arg_no + 1]));
+# endif /* AARCH64 || POWERPC64 */
+ *val = LONG_LONG(tcp->u_arg[arg_no], tcp->u_arg[arg_no + 1]);
arg_no += 2;
}
-#elif defined IA64 || defined ALPHA
- /* Technically, format expects "long long",
- * but we supply "long". We expect that
- * on this arch, they are the same.
- */
- tprintf(format, tcp->u_arg[arg_no]);
- arg_no++;
-#elif defined LINUX_MIPSN32 || defined X32
- tprintf(format, tcp->ext_arg[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) {
+ *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 SIZEOF_LONG > 4
-# error BUG: must not combine two args for long long on this arch
+# if defined __ARM_EABI__ || \
+ defined LINUX_MIPSO32 || \
+ defined POWERPC || \
+ defined XTENSA
+ /* Align arg_no to the next even number. */
+ arg_no = (arg_no + 1) & 0xe;
# endif
- tprintf(format, LONG_LONG(tcp->u_arg[arg_no], tcp->u_arg[arg_no + 1]));
+ *val = LONG_LONG(tcp->u_arg[arg_no], tcp->u_arg[arg_no + 1]);
arg_no += 2;
#endif
+
+ return arg_no;
+}
+
+/*
+ * Print 64bit argument at position arg_no and
+ * return the index of the next argument.
+ */
+int
+printllval(struct tcb *tcp, const char *format, int arg_no)
+{
+ unsigned long long val = 0;
+
+ arg_no = getllval(tcp, &val, arg_no);
+ tprintf(format, val);
return arg_no;
}
}
void
-printnum(struct tcb *tcp, long addr, const char *fmt)
+printnum_long(struct tcb *tcp, long addr, const char *fmt)
{
long num;
tprints("]");
}
-void
-printfd(struct tcb *tcp, int fd)
+const char *
+sprinttime(time_t t)
{
- const char *p;
+ struct tm *tmp;
+ static char buf[sizeof(int) * 3 * 6];
- if (show_fd_path && (p = getfdpath(tcp, fd)))
- tprintf("%d<%s>", fd, p);
+ if (t == 0) {
+ strcpy(buf, "0");
+ return buf;
+ }
+ 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);
else
- tprintf("%d", fd);
+ snprintf(buf, sizeof buf, "%lu", (unsigned long) t);
+
+ return buf;
+}
+
+static char *
+getfdproto(struct tcb *tcp, int fd, char *buf, unsigned bufsize)
+{
+#if HAVE_SYS_XATTR_H
+ ssize_t r;
+ char path[sizeof("/proc/%u/fd/%u") + 2 * sizeof(int)*3];
+
+ if (fd < 0)
+ return NULL;
+
+ sprintf(path, "/proc/%u/fd/%u", tcp->pid, fd);
+ r = getxattr(path, "system.sockprotoname", buf, bufsize - 1);
+ if (r <= 0)
+ return NULL;
+ 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;
+ }
+#else
+ return NULL;
+#endif
}
void
-printuid(const char *text, unsigned long uid)
+printfd(struct tcb *tcp, int fd)
{
- tprintf((uid == -1) ? "%s%ld" : "%s%lu", text, uid);
+ char path[PATH_MAX + 1];
+ 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;
+ 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 - 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);
+ if (!print_sockaddr_by_inode(inodenr, proto)) {
+ if (proto)
+ tprintf("%s:[%lu]", proto, inodenr);
+ else
+ tprints(path);
+ }
+ } else {
+ 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)
+static int
+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)
/* Check for NUL-terminated string. */
if (c == eol)
break;
- if (!isprint(c) && !isspace(c)) {
+
+ /* Force hex unless c is printable or whitespace */
+ if (c > 0x7e) {
+ usehex = 1;
+ break;
+ }
+ /* In ASCII isspace is only these chars: "\t\n\v\f\r".
+ * They happen to have ASCII codes 9,10,11,12,13.
+ */
+ if (c < ' ' && (unsigned)(c - 9) >= 5) {
usehex = 1;
break;
}
}
}
- *s++ = '\"';
+ if (!(style & QUOTE_OMIT_LEADING_TRAILING_QUOTES))
+ *s++ = '\"';
if (usehex) {
/* Hex-quote the whole string. */
*s++ = 'v';
break;
default:
- if (isprint(c))
+ if (c >= ' ' && c <= 0x7e)
*s++ = c;
else {
/* Print \octal */
}
}
- *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, int n)
+printpathn(struct tcb *tcp, long addr, unsigned int n)
{
- char path[MAXPATHLEN + 1];
+ char path[PATH_MAX + 1];
int nul_seen;
if (!addr) {
if (nul_seen < 0)
tprintf("%#lx", 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("...");
}
printpath(struct tcb *tcp, long addr)
{
/* Size must correspond to char path[] size in printpathn */
- printpathn(tcp, addr, MAXPATHLEN);
+ printpathn(tcp, addr, PATH_MAX);
}
/*
{
static char *str = NULL;
static char *outstr;
- int size;
+ unsigned int size;
+ unsigned int style;
int ellipsis;
if (!addr) {
die_out_of_memory();
}
+ size = max_strlen;
if (len == -1) {
/*
* Treat as a NUL-terminated string: fetch one byte more
- * because string_quote() quotes one byte less.
+ * because string_quote may look one byte ahead.
*/
- size = max_strlen + 1;
- if (umovestr(tcp, addr, size, str) < 0) {
+ if (umovestr(tcp, addr, size + 1, str) < 0) {
tprintf("%#lx", addr);
return;
}
+ style = QUOTE_0_TERMINATED;
}
else {
- size = max_strlen;
if (size > (unsigned long)len)
size = (unsigned long)len;
if (umoven(tcp, addr, size, str) < 0) {
tprintf("%#lx", addr);
return;
}
+ style = 0;
}
/* 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 || len > max_strlen));
+ ellipsis = (string_quote(str, outstr, size, style) &&
+ (len < 0 || (unsigned long) len > max_strlen));
tprints(outstr);
if (ellipsis)
tprints("...");
}
-#if HAVE_SYS_UIO_H
void
dumpiov(struct tcb *tcp, int len, long addr)
{
fprintf(stderr, "Out of memory\n");
return;
}
- if (umoven(tcp, addr, size, (char *) iov) >= 0) {
+ if (umoven(tcp, addr, size, iov) >= 0) {
for (i = 0; i < len; i++) {
/* include the buffer number to make it easy to
* match up the trace with the source */
#undef iov_iov_len
#undef iov
}
-#endif
void
dumpstr(struct tcb *tcp, long addr, int len)
strsize = len + 16;
}
- if (umoven(tcp, addr, len, (char *) str) < 0)
+ if (umoven(tcp, addr, len, str) < 0)
return;
/* Space-pad to 16 bytes */
#define PAGMASK (~(PAGSIZ - 1))
/*
* 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, int len, char *laddr)
+umoven(struct tcb *tcp, long addr, unsigned int len, void *our_addr)
{
+ char *laddr = our_addr;
int pid = tcp->pid;
- int n, m, nread;
+ unsigned int n, m, nread;
union {
long val;
char x[sizeof(long)];
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);
- if (r == len)
+ if ((unsigned int) r == len)
return 0;
if (r >= 0) {
- error_msg("umoven: short read (%d < %d) @0x%lx",
- r, len, addr);
+ error_msg("umoven: short read (%u < %u) @0x%lx",
+ (unsigned int) r, len, addr);
return -1;
}
switch (errno) {
nread = 0;
if (addr & (sizeof(long) - 1)) {
/* addr not a multiple of sizeof(long) */
- n = addr - (addr & -sizeof(long)); /* residue */
- addr &= -sizeof(long); /* residue */
+ n = addr & (sizeof(long) - 1); /* residue */
+ addr &= -sizeof(long); /* aligned address */
errno = 0;
u.val = ptrace(PTRACE_PEEKDATA, pid, (char *) addr, 0);
switch (errno) {
case EFAULT: case EIO: case EPERM:
/* address space is inaccessible */
if (nread) {
- perror_msg("umoven: short read (%d < %d) @0x%lx",
+ perror_msg("umoven: short read (%u < %u) @0x%lx",
nread, nread + len, addr - nread);
}
return -1;
* we never write past laddr[len-1]).
*/
int
-umovestr(struct tcb *tcp, long addr, int len, char *laddr)
+umovestr(struct tcb *tcp, long addr, unsigned int len, char *laddr)
{
#if SIZEOF_LONG == 4
const unsigned long x01010101 = 0x01010101ul;
#endif
int pid = tcp->pid;
- int n, m, nread;
+ unsigned int n, m, nread;
union {
unsigned long val;
char x[sizeof(long)];
remote[0].iov_base = (void*)addr;
while (len > 0) {
- int end_in_page;
+ unsigned int chunk_len;
+ unsigned int end_in_page;
int r;
- int chunk_len;
/* Don't read kilobytes: most strings are short */
chunk_len = len;
* (I hope there aren't arches with pages < 4K)
*/
end_in_page = ((addr + chunk_len) & 4095);
- r = chunk_len - end_in_page;
- if (r > 0) /* if chunk_len > end_in_page */
- chunk_len = r; /* chunk_len -= end_in_page */
+ 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);
if (addr & (sizeof(long) - 1)) {
/* addr not a multiple of sizeof(long) */
- n = addr - (addr & -sizeof(long)); /* residue */
- addr &= -sizeof(long); /* residue */
+ n = addr & (sizeof(long) - 1); /* residue */
+ addr &= -sizeof(long); /* aligned address */
errno = 0;
u.val = ptrace(PTRACE_PEEKDATA, pid, (char *)addr, 0);
switch (errno) {
}
int
-upeek(struct tcb *tcp, long off, long *res)
+upeek(int pid, long off, long *res)
{
long val;
errno = 0;
- val = ptrace(PTRACE_PEEKUSER, tcp->pid, (char *) off, 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)", tcp->pid, off);
+ 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.
- */
-
-#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)
-{
- unsigned long cfm, sof, sol;
- long bsp;
-
- if (ia32) {
- /* Satisfy a false GCC warning. */
- *state = NULL;
- return 0;
- }
-
- if (upeek(tcp, PT_AR_BSP, &bsp) < 0)
- return -1;
- if (upeek(tcp, PT_CFM, (long *) &cfm) < 0)
- return -1;
-
- sof = (cfm >> 0) & 0x7f;
- sol = (cfm >> 7) & 0x7f;
- bsp = (long) ia64_rse_skip_regs((unsigned long *) bsp, -sof + sol);
-
- *state = (unsigned long *) bsp;
- return 0;
-}
-
-# define arg_finish_change(tcp, state) 0
-
-static int
-get_arg0(struct tcb *tcp, arg_setup_state *state, long *valp)
-{
- int ret;
-
- if (ia32)
- ret = upeek(tcp, PT_R11, valp);
- else
- ret = umoven(tcp,
- (unsigned long) ia64_rse_skip_regs(*state, 0),
- sizeof(long), (void *) valp);
- return ret;
-}
-
-static int
-get_arg1(struct tcb *tcp, arg_setup_state *state, long *valp)
-{
- int ret;
-
- if (ia32)
- ret = upeek(tcp, PT_R9, valp);
- else
- ret = umoven(tcp,
- (unsigned long) ia64_rse_skip_regs(*state, 1),
- sizeof(long), (void *) valp);
- return ret;
-}
-
-static int
-set_arg0(struct tcb *tcp, arg_setup_state *state, long val)
-{
- int req = PTRACE_POKEDATA;
- void *ap;
-
- if (ia32) {
- 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;
-}
-
-static int
-set_arg1(struct tcb *tcp, arg_setup_state *state, long val)
-{
- int req = PTRACE_POKEDATA;
- void *ap;
-
- if (ia32) {
- 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;
-}
-
-/* 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), arg0_offset, (valp)))
-# define get_arg1(tcp, cookie, valp) (upeek((tcp), arg1_offset, (valp)))
-
-static int
-set_arg0(struct tcb *tcp, void *cookie, long val)
-{
- return ptrace(PTRACE_POKEUSER, tcp->pid, (char*)arg0_offset, val);
-}
-
-static int
-set_arg1(struct tcb *tcp, void *cookie, long val)
-{
- return ptrace(PTRACE_POKEUSER, tcp->pid, (char*)arg1_offset, val);
-}
-
-#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 (ia32) {
- 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. */
-#else
-#warning Do not know how to handle change_syscall for this architecture
-#endif /* architecture */
- return -1;
-}
-
-int
-setbpt(struct tcb *tcp)
-{
- 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);
- 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) {
- int i;
- for (i = 0; i < nsyscalls; ++i)
- if (sysent[i].sys_func == sys_clone) {
- clone_scno[current_personality] = i;
- break;
- }
- }
-
- if (tcp->s_ent->sys_func == sys_fork ||
- tcp->s_ent->sys_func == sys_vfork) {
- 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 (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;
- }
-
- 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;
- return 0;
-}
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