* 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
#include "defs.h"
#include <fcntl.h>
-#if HAVE_SYS_UIO_H
-# include <sys/uio.h>
-#endif
+#include <sys/uio.h>
-int
-sys_read(struct tcb *tcp)
+SYS_FUNC(read)
{
if (entering(tcp)) {
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(struct tcb *tcp)
+SYS_FUNC(write)
{
- if (entering(tcp)) {
- printfd(tcp, tcp->u_arg[0]);
- tprints(", ");
- 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
-/*
- * data_size limits the cumulative size of printed data.
- * Example: recvmsg returing a short read.
- */
-void
-tprint_iov_upto(struct tcb *tcp, unsigned long len, unsigned long addr, int decode_iov, unsigned long data_size)
+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)
{
-#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;
- } iov;
-#define sizeof_iov \
- (current_wordsize == 4 ? sizeof(iov.iov32) : sizeof(iov.iov64))
-#define iov_iov_base \
- (current_wordsize == 4 ? (uint64_t) iov.iov32.base : iov.iov64.base)
-#define iov_iov_len \
- (current_wordsize == 4 ? (uint64_t) iov.iov32.len : iov.iov64.len)
-#else
- struct iovec iov;
-#define sizeof_iov sizeof(iov)
-#define iov_iov_base iov.iov_base
-#define iov_iov_len iov.iov_len
-#endif
- unsigned long size, cur, end, abbrev_end;
- int failed = 0;
+ const kernel_ulong_t *iov;
+ kernel_ulong_t iov_buf[2], len;
+ struct print_iovec_config *c = data;
- if (!len) {
- tprints("[]");
- return;
- }
- size = len * sizeof_iov;
- end = addr + size;
- if (!verbose(tcp) || size / sizeof_iov != len || end < addr) {
- tprintf("%#lx", addr);
- return;
- }
- if (abbrev(tcp)) {
- abbrev_end = addr + max_strlen * sizeof_iov;
- if (abbrev_end < addr)
- abbrev_end = end;
+ 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 {
- abbrev_end = end;
+ iov = elem_buf;
}
- tprints("[");
- for (cur = addr; cur < end; cur += sizeof_iov) {
- if (cur > addr)
- tprints(", ");
- if (cur >= abbrev_end) {
- tprints("...");
+
+ 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;
- }
- if (umoven(tcp, cur, sizeof_iov, (char *) &iov) < 0) {
- tprints("?");
- failed = 1;
+ 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;
- }
- tprints("{");
- if (decode_iov) {
- unsigned long len = iov_iov_len;
- if (len > data_size)
- len = data_size;
- data_size -= len;
- printstr(tcp, (long) iov_iov_base, len);
- } else
- tprintf("%#lx", (long) iov_iov_base);
- tprintf(", %lu}", (unsigned long)iov_iov_len);
}
- tprints("]");
- if (failed)
- tprintf(" %#lx", addr);
-#undef sizeof_iov
-#undef iov_iov_base
-#undef iov_iov_len
+
+ tprintf(", iov_len=%" PRI_klu "}", iov[1]);
+
+ return true;
}
+/*
+ * data_size limits the cumulative size of printed data.
+ * Example: recvmsg returing a short read.
+ */
void
-tprint_iov(struct tcb *tcp, unsigned long len, unsigned long addr, int decode_iov)
+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)
{
- tprint_iov_upto(tcp, len, addr, decode_iov, (unsigned long) -1L);
+ 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_readv(struct tcb *tcp)
+SYS_FUNC(readv)
{
if (entering(tcp)) {
printfd(tcp, tcp->u_arg[0]);
tprints(", ");
} 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], 1);
- tprintf(", %lu", tcp->u_arg[2]);
+ 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;
}
-int
-sys_writev(struct tcb *tcp)
+SYS_FUNC(writev)
{
- if (entering(tcp)) {
- printfd(tcp, tcp->u_arg[0]);
- tprints(", ");
- tprint_iov(tcp, tcp->u_arg[2], tcp->u_arg[1], 1);
- tprintf(", %lu", tcp->u_arg[2]);
- }
- return 0;
-}
-#endif
+ 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]);
-/* 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 takes an extra padding argument before the offset. This
- was changed late in the 2.4 series (around 2.4.20). */
-#if defined(SH)
-#define PREAD_OFFSET_ARG 4
-#else
-#define PREAD_OFFSET_ARG 3
-#endif
+ return RVAL_DECODED;
+}
-int
-sys_pread(struct tcb *tcp)
+SYS_FUNC(pread)
{
if (entering(tcp)) {
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]);
- printllval(tcp, "%llu", PREAD_OFFSET_ARG);
+ 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(struct tcb *tcp)
+SYS_FUNC(pwrite)
{
- if (entering(tcp)) {
- printfd(tcp, tcp->u_arg[0]);
- tprints(", ");
- printstr(tcp, tcp->u_arg[1], tcp->u_arg[2]);
- tprintf(", %lu, ", tcp->u_arg[2]);
- printllval(tcp, "%llu", PREAD_OFFSET_ARG);
+ 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
}
-#if HAVE_SYS_UIO_H
-int
-sys_preadv(struct tcb *tcp)
+#include "xlat/rwf_flags.h"
+
+static int
+do_preadv(struct tcb *tcp, const int flags_arg)
{
if (entering(tcp)) {
printfd(tcp, tcp->u_arg[0]);
tprints(", ");
} else {
- if (syserror(tcp)) {
- tprintf("%#lx, %lu", tcp->u_arg[1], tcp->u_arg[2]);
- return 0;
+ 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_???");
}
- tprint_iov(tcp, tcp->u_arg[2], tcp->u_arg[1], 1);
- tprintf(", %lu, ", tcp->u_arg[2]);
- printllval(tcp, "%llu", PREAD_OFFSET_ARG);
}
return 0;
}
-int
-sys_pwritev(struct tcb *tcp)
+SYS_FUNC(preadv)
{
- if (entering(tcp)) {
- printfd(tcp, tcp->u_arg[0]);
- tprints(", ");
- tprint_iov(tcp, tcp->u_arg[2], tcp->u_arg[1], 1);
- tprintf(", %lu, ", tcp->u_arg[2]);
- printllval(tcp, "%llu", PREAD_OFFSET_ARG);
- }
- return 0;
+ return do_preadv(tcp, -1);
}
-#endif /* HAVE_SYS_UIO_H */
-int
-sys_sendfile(struct tcb *tcp)
+static int
+do_pwritev(struct tcb *tcp, const int flags_arg)
{
- if (entering(tcp)) {
- off_t offset;
+ kernel_ulong_t len =
+ truncate_kulong_to_current_wordsize(tcp->u_arg[2]);
- printfd(tcp, tcp->u_arg[0]);
+ 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(", ");
- printfd(tcp, tcp->u_arg[1]);
- tprints(", ");
- if (!tcp->u_arg[2])
- tprints("NULL");
- else if (umove(tcp, tcp->u_arg[2], &offset) < 0)
- tprintf("%#lx", tcp->u_arg[2]);
- else
-#ifdef HAVE_LONG_LONG_OFF_T
- tprintf("[%llu]", offset);
-#else
- tprintf("[%lu]", offset);
-#endif
- tprintf(", %lu", tcp->u_arg[3]);
+ printflags(rwf_flags, tcp->u_arg[flags_arg], "RWF_???");
}
- return 0;
-}
-void
-print_loff_t(struct tcb *tcp, long addr)
-{
- loff_t offset;
-
- if (!addr)
- tprints("NULL");
- else if (umove(tcp, addr, &offset) < 0)
- tprintf("%#lx", addr);
- else
- tprintf("[%llu]", (unsigned long long int) offset);
+ return RVAL_DECODED;
}
-int
-sys_sendfile64(struct tcb *tcp)
+SYS_FUNC(pwritev)
{
- if (entering(tcp)) {
- printfd(tcp, tcp->u_arg[0]);
- tprints(", ");
- printfd(tcp, tcp->u_arg[1]);
- tprints(", ");
- print_loff_t(tcp, tcp->u_arg[2]);
- tprintf(", %lu", tcp->u_arg[3]);
- }
- return 0;
+ return do_pwritev(tcp, -1);
}
-static const struct xlat splice_flags[] = {
-#ifdef SPLICE_F_MOVE
- { SPLICE_F_MOVE, "SPLICE_F_MOVE" },
-#endif
-#ifdef SPLICE_F_NONBLOCK
- { SPLICE_F_NONBLOCK, "SPLICE_F_NONBLOCK" },
-#endif
-#ifdef SPLICE_F_MORE
- { SPLICE_F_MORE, "SPLICE_F_MORE" },
-#endif
-#ifdef SPLICE_F_GIFT
- { SPLICE_F_GIFT, "SPLICE_F_GIFT" },
+/*
+ * 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
- { 0, NULL },
-};
-int
-sys_tee(struct tcb *tcp)
+SYS_FUNC(preadv2)
{
- if (entering(tcp)) {
- /* int fd_in */
- printfd(tcp, tcp->u_arg[0]);
- tprints(", ");
- /* int fd_out */
- printfd(tcp, tcp->u_arg[1]);
- tprints(", ");
- /* size_t len */
- tprintf("%lu, ", tcp->u_arg[2]);
- /* unsigned int flags */
- printflags(splice_flags, tcp->u_arg[3], "SPLICE_F_???");
- }
- return 0;
+ return do_preadv(tcp, PREADV2_PWRITEV2_FLAGS_ARG_NO);
}
-int
-sys_splice(struct tcb *tcp)
+SYS_FUNC(pwritev2)
{
- if (entering(tcp)) {
- /* int fd_in */
- printfd(tcp, tcp->u_arg[0]);
- tprints(", ");
- /* loff_t *off_in */
- print_loff_t(tcp, tcp->u_arg[1]);
- tprints(", ");
- /* int fd_out */
- printfd(tcp, tcp->u_arg[2]);
- tprints(", ");
- /* loff_t *off_out */
- print_loff_t(tcp, tcp->u_arg[3]);
- tprints(", ");
- /* size_t len */
- tprintf("%lu, ", tcp->u_arg[4]);
- /* unsigned int flags */
- printflags(splice_flags, tcp->u_arg[5], "SPLICE_F_???");
- }
- return 0;
+ return do_pwritev(tcp, PREADV2_PWRITEV2_FLAGS_ARG_NO);
}
-int
-sys_vmsplice(struct tcb *tcp)
+#include "xlat/splice_flags.h"
+
+SYS_FUNC(tee)
{
- if (entering(tcp)) {
- /* 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], 1);
- tprintf(", %lu, ", tcp->u_arg[2]);
- /* unsigned int flags */
- printflags(splice_flags, tcp->u_arg[3], "SPLICE_F_???");
- }
- 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_ioctl(struct tcb *tcp)
+SYS_FUNC(splice)
{
- const struct ioctlent *iop;
+ /* 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_???");
- if (entering(tcp)) {
- printfd(tcp, tcp->u_arg[0]);
- tprints(", ");
- iop = ioctl_lookup(tcp->u_arg[1]);
- if (iop) {
- tprints(iop->symbol);
- while ((iop = ioctl_next_match(iop)))
- tprintf(" or %s", iop->symbol);
- } else
- tprintf("%#lx", tcp->u_arg[1]);
- ioctl_decode(tcp, tcp->u_arg[1], tcp->u_arg[2]);
- }
- else {
- int ret = ioctl_decode(tcp, tcp->u_arg[1], tcp->u_arg[2]);
- if (!ret)
- tprintf(", %#lx", tcp->u_arg[2]);
- else
- return ret - 1;
- }
- return 0;
+ return RVAL_DECODED;
+}
+
+SYS_FUNC(vmsplice)
+{
+ /* 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_???");
+
+ return RVAL_DECODED;
}
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