* 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) 1999-2018 The strace developers.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- * $Id$
*/
#include "defs.h"
-
#include <fcntl.h>
-#if HAVE_SYS_UIO_H
#include <sys/uio.h>
-#endif
-
-#ifdef HAVE_LONG_LONG_OFF_T
-/*
- * Hacks for systems that have a long long off_t
- */
-#define sys_pread64 sys_pread
-#define sys_pwrite64 sys_pwrite
-#endif
-
-int
-sys_read(tcp)
-struct tcb *tcp;
+SYS_FUNC(read)
{
if (entering(tcp)) {
- tprintf("%ld, ", tcp->u_arg[0]);
+ printfd(tcp, tcp->u_arg[0]);
+ tprints(", ");
} else {
if (syserror(tcp))
- tprintf("%#lx", tcp->u_arg[1]);
+ printaddr(tcp->u_arg[1]);
else
- printstr(tcp, tcp->u_arg[1], tcp->u_rval);
- tprintf(", %lu", tcp->u_arg[2]);
+ printstrn(tcp, tcp->u_arg[1], tcp->u_rval);
+ tprintf(", %" PRI_klu, tcp->u_arg[2]);
}
return 0;
}
-int
-sys_write(tcp)
-struct tcb *tcp;
+SYS_FUNC(write)
{
- if (entering(tcp)) {
- tprintf("%ld, ", tcp->u_arg[0]);
- printstr(tcp, tcp->u_arg[1], tcp->u_arg[2]);
- tprintf(", %lu", tcp->u_arg[2]);
- }
- return 0;
+ printfd(tcp, tcp->u_arg[0]);
+ tprints(", ");
+ printstrn(tcp, tcp->u_arg[1], tcp->u_arg[2]);
+ tprintf(", %" PRI_klu, tcp->u_arg[2]);
+
+ return RVAL_DECODED;
}
-#if HAVE_SYS_UIO_H
-void
-tprint_iov(tcp, len, addr)
-struct tcb * tcp;
-int len;
-long addr;
-{
- struct iovec *iov;
- int i;
+struct print_iovec_config {
+ enum iov_decode decode_iov;
+ kernel_ulong_t data_size;
+};
+static bool
+print_iovec(struct tcb *tcp, void *elem_buf, size_t elem_size, void *data)
+{
+ const kernel_ulong_t *iov;
+ kernel_ulong_t iov_buf[2], len;
+ struct print_iovec_config *c = data;
- if (!len) {
- tprintf("[]");
- return;
- }
-
- if ((iov = (struct iovec *) malloc(len * sizeof *iov)) == NULL) {
- fprintf(stderr, "No memory");
- return;
- }
- if (umoven(tcp, addr,
- len * sizeof *iov, (char *) iov) < 0) {
- tprintf("%#lx", tcp->u_arg[1]);
+ if (elem_size < sizeof(iov_buf)) {
+ iov_buf[0] = ((unsigned int *) elem_buf)[0];
+ iov_buf[1] = ((unsigned int *) elem_buf)[1];
+ iov = iov_buf;
} else {
- tprintf("[");
- for (i = 0; i < len; i++) {
- if (i)
- tprintf(", ");
- tprintf("{");
- printstr(tcp, (long) iov[i].iov_base,
- iov[i].iov_len);
- tprintf(", %lu}", (unsigned long)iov[i].iov_len);
- }
- tprintf("]");
+ iov = elem_buf;
}
- free((char *) iov);
+
+ tprints("{iov_base=");
+
+ len = iov[1];
+
+ switch (c->decode_iov) {
+ case IOV_DECODE_STR:
+ if (len > c->data_size)
+ len = c->data_size;
+ if (c->data_size != (kernel_ulong_t) -1)
+ c->data_size -= len;
+ printstrn(tcp, iov[0], len);
+ break;
+ case IOV_DECODE_NETLINK:
+ if (len > c->data_size)
+ len = c->data_size;
+ if (c->data_size != (kernel_ulong_t) -1)
+ c->data_size -= len;
+ /* assume that the descriptor is 1st syscall argument */
+ decode_netlink(tcp, tcp->u_arg[0], iov[0], len);
+ break;
+ default:
+ printaddr(iov[0]);
+ break;
+ }
+
+ tprintf(", iov_len=%" PRI_klu "}", iov[1]);
+
+ return true;
}
-int
-sys_readv(tcp)
-struct tcb *tcp;
+/*
+ * data_size limits the cumulative size of printed data.
+ * Example: recvmsg returing a short read.
+ */
+void
+tprint_iov_upto(struct tcb *const tcp, const kernel_ulong_t len,
+ const kernel_ulong_t addr, const enum iov_decode decode_iov,
+ const kernel_ulong_t data_size)
{
- if (entering(tcp)) {
- tprintf("%ld, ", tcp->u_arg[0]);
- } else {
- if (syserror(tcp)) {
- tprintf("%#lx, %lu",
- tcp->u_arg[1], tcp->u_arg[2]);
- return 0;
- }
- tprint_iov(tcp, tcp->u_arg[2], tcp->u_arg[1]);
- tprintf(", %lu", tcp->u_arg[2]);
- }
- return 0;
+ kernel_ulong_t iov[2];
+ struct print_iovec_config config = {
+ .decode_iov = decode_iov, .data_size = data_size
+ };
+
+ print_array(tcp, addr, len, iov, current_wordsize * 2,
+ tfetch_mem_ignore_syserror, print_iovec, &config);
}
-int
-sys_writev(tcp)
-struct tcb *tcp;
+SYS_FUNC(readv)
{
if (entering(tcp)) {
- tprintf("%ld, ", tcp->u_arg[0]);
- tprint_iov(tcp, tcp->u_arg[2], tcp->u_arg[1]);
- tprintf(", %lu", tcp->u_arg[2]);
+ printfd(tcp, tcp->u_arg[0]);
+ tprints(", ");
+ } else {
+ tprint_iov_upto(tcp, tcp->u_arg[2], tcp->u_arg[1],
+ syserror(tcp) ? IOV_DECODE_ADDR :
+ IOV_DECODE_STR, tcp->u_rval);
+ tprintf(", %" PRI_klu, tcp->u_arg[2]);
}
return 0;
}
-#endif
-#if defined(SVR4)
+SYS_FUNC(writev)
+{
+ printfd(tcp, tcp->u_arg[0]);
+ tprints(", ");
+ tprint_iov(tcp, tcp->u_arg[2], tcp->u_arg[1], IOV_DECODE_STR);
+ tprintf(", %" PRI_klu, tcp->u_arg[2]);
-int
-sys_pread(tcp)
-struct tcb *tcp;
+ return RVAL_DECODED;
+}
+
+SYS_FUNC(pread)
{
if (entering(tcp)) {
- tprintf("%ld, ", tcp->u_arg[0]);
+ printfd(tcp, tcp->u_arg[0]);
+ tprints(", ");
} else {
if (syserror(tcp))
- tprintf("%#lx", tcp->u_arg[1]);
+ printaddr(tcp->u_arg[1]);
else
- printstr(tcp, tcp->u_arg[1], tcp->u_rval);
-#if UNIXWARE
- /* off_t is signed int */
- tprintf(", %lu, %ld", tcp->u_arg[2], tcp->u_arg[3]);
-#else
- tprintf(", %lu, %llu", tcp->u_arg[2],
- (((unsigned long long) tcp->u_arg[4]) << 32
- | (unsigned) tcp->u_arg[3]));
-#endif
+ printstrn(tcp, tcp->u_arg[1], tcp->u_rval);
+ tprintf(", %" PRI_klu ", ", tcp->u_arg[2]);
+ printllval(tcp, "%lld", 3);
}
return 0;
}
-int
-sys_pwrite(tcp)
-struct tcb *tcp;
+SYS_FUNC(pwrite)
{
- if (entering(tcp)) {
- tprintf("%ld, ", tcp->u_arg[0]);
- printstr(tcp, tcp->u_arg[1], tcp->u_arg[2]);
-#if UNIXWARE
- /* off_t is signed int */
- tprintf(", %lu, %ld", tcp->u_arg[2], tcp->u_arg[3]);
-#else
- tprintf(", %lu, %llu", tcp->u_arg[2],
- (((unsigned long long) tcp->u_arg[4]) << 32
- | (unsigned) tcp->u_arg[3]));
-#endif
+ printfd(tcp, tcp->u_arg[0]);
+ tprints(", ");
+ printstrn(tcp, tcp->u_arg[1], tcp->u_arg[2]);
+ tprintf(", %" PRI_klu ", ", tcp->u_arg[2]);
+ printllval(tcp, "%lld", 3);
+
+ return RVAL_DECODED;
+}
+
+static void
+print_lld_from_low_high_val(struct tcb *tcp, int arg)
+{
+#if SIZEOF_KERNEL_LONG_T > 4
+# ifndef current_klongsize
+ if (current_klongsize < SIZEOF_KERNEL_LONG_T) {
+ tprintf("%" PRI_kld, (tcp->u_arg[arg + 1] << 32)
+ | tcp->u_arg[arg]);
+ } else
+# endif /* !current_klongsize */
+ {
+ tprintf("%" PRI_kld, tcp->u_arg[arg]);
}
- return 0;
+#else /* SIZEOF_KERNEL_LONG_T == 4 */
+ tprintf("%lld",
+ ((long long) tcp->u_arg[arg + 1] << 32)
+ | ((long long) tcp->u_arg[arg]));
+#endif
}
-#endif /* SVR4 */
-#ifdef FREEBSD
-#include <sys/types.h>
-#include <sys/socket.h>
+#include "xlat/rwf_flags.h"
-int
-sys_sendfile(tcp)
-struct tcb *tcp;
+static int
+do_preadv(struct tcb *tcp, const int flags_arg)
{
if (entering(tcp)) {
- tprintf("%ld, %ld, %llu, %lu", tcp->u_arg[0], tcp->u_arg[1],
- (((unsigned long long) tcp->u_arg[3]) << 32 |
- (unsigned) tcp->u_arg[2]), tcp->u_arg[4]);
+ printfd(tcp, tcp->u_arg[0]);
+ tprints(", ");
} else {
- off_t offset;
-
- if (!tcp->u_arg[5])
- tprintf(", NULL");
- else {
- struct sf_hdtr hdtr;
-
- if (umove(tcp, tcp->u_arg[5], &hdtr) < 0)
- tprintf(", %#lx", tcp->u_arg[5]);
- else {
- tprintf(", { ");
- tprint_iov(tcp, hdtr.hdr_cnt, hdtr.headers);
- tprintf(", %u, ", hdtr.hdr_cnt);
- tprint_iov(tcp, hdtr.trl_cnt, hdtr.trailers);
- tprintf(", %u }", hdtr.hdr_cnt);
- }
+ kernel_ulong_t len =
+ truncate_kulong_to_current_wordsize(tcp->u_arg[2]);
+
+ tprint_iov_upto(tcp, len, tcp->u_arg[1],
+ syserror(tcp) ? IOV_DECODE_ADDR :
+ IOV_DECODE_STR, tcp->u_rval);
+ tprintf(", %" PRI_klu ", ", len);
+ print_lld_from_low_high_val(tcp, 3);
+ if (flags_arg >= 0) {
+ tprints(", ");
+ printflags(rwf_flags, tcp->u_arg[flags_arg], "RWF_???");
}
- if (!tcp->u_arg[6])
- tprintf(", NULL");
- else if (umove(tcp, tcp->u_arg[6], &offset) < 0)
- tprintf(", %#lx", tcp->u_arg[6]);
- else
- tprintf(", [%llu]", offset);
- tprintf(", %lu", tcp->u_arg[7]);
}
return 0;
}
-#endif /* FREEBSD */
-#ifdef LINUX
-int
-sys_pread(tcp)
-struct tcb *tcp;
+SYS_FUNC(preadv)
{
- if (entering(tcp)) {
- tprintf("%ld, ", tcp->u_arg[0]);
- } else {
- if (syserror(tcp))
- tprintf("%#lx", tcp->u_arg[1]);
- else
- printstr(tcp, tcp->u_arg[1], tcp->u_rval);
- tprintf(", %lu, %llu", tcp->u_arg[2],
- *(unsigned long long *)&tcp->u_arg[3]);
- }
- return 0;
+ return do_preadv(tcp, -1);
}
-int
-sys_pwrite(tcp)
-struct tcb *tcp;
+static int
+do_pwritev(struct tcb *tcp, const int flags_arg)
{
- if (entering(tcp)) {
- tprintf("%ld, ", tcp->u_arg[0]);
- printstr(tcp, tcp->u_arg[1], tcp->u_arg[2]);
- tprintf(", %lu, %llu", tcp->u_arg[2],
- *(unsigned long long *)&tcp->u_arg[3]);
+ kernel_ulong_t len =
+ truncate_kulong_to_current_wordsize(tcp->u_arg[2]);
+
+ printfd(tcp, tcp->u_arg[0]);
+ tprints(", ");
+ tprint_iov(tcp, len, tcp->u_arg[1], IOV_DECODE_STR);
+ tprintf(", %" PRI_klu ", ", len);
+ print_lld_from_low_high_val(tcp, 3);
+ if (flags_arg >= 0) {
+ tprints(", ");
+ printflags(rwf_flags, tcp->u_arg[flags_arg], "RWF_???");
}
- return 0;
+
+ return RVAL_DECODED;
}
-int
-sys_sendfile(tcp)
-struct tcb *tcp;
+SYS_FUNC(pwritev)
{
- if (entering(tcp)) {
- off_t offset;
+ return do_pwritev(tcp, -1);
+}
- tprintf("%ld, %ld, ", tcp->u_arg[0], tcp->u_arg[1]);
- if (!tcp->u_arg[2])
- tprintf("NULL");
- else if (umove(tcp, tcp->u_arg[2], &offset) < 0)
- tprintf("%#lx", tcp->u_arg[2]);
- else
- tprintf("[%lu]", offset);
- tprintf(", %lu", tcp->u_arg[3]);
- }
- return 0;
+/*
+ * x32 is the only architecture where preadv2 takes 5 arguments
+ * instead of 6, see preadv64v2 in kernel sources.
+ * Likewise, x32 is the only architecture where pwritev2 takes 5 arguments
+ * instead of 6, see pwritev64v2 in kernel sources.
+ */
+
+#if defined X86_64
+# define PREADV2_PWRITEV2_FLAGS_ARG_NO (current_personality == 2 ? 4 : 5)
+#elif defined X32
+# define PREADV2_PWRITEV2_FLAGS_ARG_NO (current_personality == 0 ? 4 : 5)
+#else
+# define PREADV2_PWRITEV2_FLAGS_ARG_NO 5
+#endif
+
+SYS_FUNC(preadv2)
+{
+ return do_preadv(tcp, PREADV2_PWRITEV2_FLAGS_ARG_NO);
+}
+
+SYS_FUNC(pwritev2)
+{
+ return do_pwritev(tcp, PREADV2_PWRITEV2_FLAGS_ARG_NO);
}
-#endif /* LINUX */
+#include "xlat/splice_flags.h"
-#if _LFS64_LARGEFILE || HAVE_LONG_LONG_OFF_T
-int
-sys_pread64(tcp)
-struct tcb *tcp;
+SYS_FUNC(tee)
{
- if (entering(tcp)) {
- tprintf("%ld, ", tcp->u_arg[0]);
- } else {
- ALIGN64 (tcp, 3);
- if (syserror(tcp))
- tprintf("%#lx", tcp->u_arg[1]);
- else
- printstr(tcp, tcp->u_arg[1], tcp->u_rval);
- tprintf(", %lu, %#llx", tcp->u_arg[2],
- LONG_LONG(tcp->u_arg[3], tcp->u_arg[4]));
- }
- return 0;
+ /* int fd_in */
+ printfd(tcp, tcp->u_arg[0]);
+ tprints(", ");
+ /* int fd_out */
+ printfd(tcp, tcp->u_arg[1]);
+ tprints(", ");
+ /* size_t len */
+ tprintf("%" PRI_klu ", ", tcp->u_arg[2]);
+ /* unsigned int flags */
+ printflags(splice_flags, tcp->u_arg[3], "SPLICE_F_???");
+
+ return RVAL_DECODED;
}
-int
-sys_pwrite64(tcp)
-struct tcb *tcp;
+SYS_FUNC(splice)
{
- if (entering(tcp)) {
- ALIGN64 (tcp, 3);
- tprintf("%ld, ", tcp->u_arg[0]);
- printstr(tcp, tcp->u_arg[1], tcp->u_arg[2]);
- tprintf(", %lu, %#llx", tcp->u_arg[2],
- LONG_LONG(tcp->u_arg[3], tcp->u_arg[4]));
- }
- return 0;
+ /* int fd_in */
+ printfd(tcp, tcp->u_arg[0]);
+ tprints(", ");
+ /* loff_t *off_in */
+ printnum_int64(tcp, tcp->u_arg[1], "%" PRId64);
+ tprints(", ");
+ /* int fd_out */
+ printfd(tcp, tcp->u_arg[2]);
+ tprints(", ");
+ /* loff_t *off_out */
+ printnum_int64(tcp, tcp->u_arg[3], "%" PRId64);
+ tprints(", ");
+ /* size_t len */
+ tprintf("%" PRI_klu ", ", tcp->u_arg[4]);
+ /* unsigned int flags */
+ printflags(splice_flags, tcp->u_arg[5], "SPLICE_F_???");
+
+ return RVAL_DECODED;
}
-#endif
-
-int
-sys_ioctl(tcp)
-struct tcb *tcp;
+
+SYS_FUNC(vmsplice)
{
- char *symbol;
+ /* int fd */
+ printfd(tcp, tcp->u_arg[0]);
+ tprints(", ");
+ /* const struct iovec *iov, unsigned long nr_segs */
+ tprint_iov(tcp, tcp->u_arg[2], tcp->u_arg[1], IOV_DECODE_STR);
+ tprintf(", %" PRI_klu ", ", tcp->u_arg[2]);
+ /* unsigned int flags */
+ printflags(splice_flags, tcp->u_arg[3], "SPLICE_F_???");
- if (entering(tcp)) {
- tprintf("%ld, ", tcp->u_arg[0]);
- symbol = ioctl_lookup(tcp->u_arg[1]);
- if (symbol)
- tprintf("%s", symbol);
- else
- tprintf("%#lx", tcp->u_arg[1]);
- ioctl_decode(tcp, tcp->u_arg[1], tcp->u_arg[2]);
- }
- else {
- if (ioctl_decode(tcp, tcp->u_arg[1], tcp->u_arg[2]) == 0)
- tprintf(", %#lx", tcp->u_arg[2]);
- }
- return 0;
+ return RVAL_DECODED;
}
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