X-Git-Url: https://granicus.if.org/sourcecode?a=blobdiff_plain;f=io.c;h=2a36c000d001b5075d73ed9eadeea3ceb088dea2;hb=924996a41e54a3ac6bb90a43a8cebbbf6c0e1319;hp=4e00fe4e04617b5493ae1ee9ad8fc121f2616717;hpb=76baf7c9f6dd61a15524ad43c1b690c252cf5b7c;p=strace

diff --git a/io.c b/io.c
index 4e00fe4e..2a36c000 100644
--- a/io.c
+++ b/io.c
@@ -2,6 +2,7 @@
  * Copyright (c) 1991, 1992 Paul Kranenburg <pk@cs.few.eur.nl>
  * Copyright (c) 1993 Branko Lankester <branko@hacktic.nl>
  * Copyright (c) 1993, 1994, 1995, 1996 Rick Sladkey <jrs@world.std.com>
+ * Copyright (c) 1996-1999 Wichert Akkerman <wichert@cistron.nl>
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -25,21 +26,18 @@
  * 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>
 #include <sys/uio.h>
 
 int
-sys_read(tcp)
-struct tcb *tcp;
+sys_read(struct tcb *tcp)
 {
 	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]);
@@ -51,178 +49,370 @@ struct tcb *tcp;
 }
 
 int
-sys_write(tcp)
-struct tcb *tcp;
+sys_write(struct tcb *tcp)
 {
 	if (entering(tcp)) {
-		tprintf("%ld, ", tcp->u_arg[0]);
+		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;
 }
 
-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 *tcp, unsigned long len, unsigned long addr, int decode_iov, unsigned long 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;
+	} 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;
+
+	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;
+	} else {
+		abbrev_end = end;
+	}
+	tprints("[");
+	for (cur = addr; cur < end; cur += sizeof_iov) {
+		if (cur > addr)
+			tprints(", ");
+		if (cur >= abbrev_end) {
+			tprints("...");
+			break;
+		}
+		if (umoven(tcp, cur, sizeof_iov, (char *) &iov) < 0) {
+			tprints("?");
+			failed = 1;
+			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
+}
+
+void
+tprint_iov(struct tcb *tcp, unsigned long len, unsigned long addr, int decode_iov)
 {
-	struct iovec *iov;
-	int i, len;
+	tprint_iov_upto(tcp, len, addr, decode_iov, (unsigned long) -1L);
+}
 
+int
+sys_readv(struct tcb *tcp)
+{
 	if (entering(tcp)) {
-		tprintf("%ld, ", tcp->u_arg[0]);
+		printfd(tcp, tcp->u_arg[0]);
+		tprints(", ");
 	} else {
 		if (syserror(tcp)) {
 			tprintf("%#lx, %lu",
 					tcp->u_arg[1], tcp->u_arg[2]);
 			return 0;
 		}
-		len = tcp->u_arg[2];
-		if ((iov = (struct iovec *) malloc(len * sizeof *iov)) == NULL) {
-			fprintf(stderr, "No memory");
-			return 0;
-		}
-		if (umoven(tcp, tcp->u_arg[1],
-				len * sizeof *iov, (char *) iov) < 0) {
-			tprintf("%#lx", tcp->u_arg[1]);
-		} else {
-			tprintf("[");
-			for (i = 0; i < len; i++) {
-				if (i)
-					tprintf(", ");
-				tprintf("{");
-				printstr(tcp, (long) iov[i].iov_base,
-					iov[i].iov_len);
-				tprintf(", %u}", iov[i].iov_len);
-			}
-			tprintf("]");
-		}
-		free((char *) iov);
+		tprint_iov(tcp, tcp->u_arg[2], tcp->u_arg[1], 1);
 		tprintf(", %lu", tcp->u_arg[2]);
 	}
 	return 0;
 }
 
 int
-sys_writev(tcp)
-struct tcb *tcp;
+sys_writev(struct tcb *tcp)
 {
-	struct iovec *iov;
-	int i, len;
-
 	if (entering(tcp)) {
-		tprintf("%ld, ", tcp->u_arg[0]);
-		len = tcp->u_arg[2];
-		iov = (struct iovec *) malloc(len * sizeof *iov);
-		if (iov == NULL) {
-			fprintf(stderr, "No memory");
-			return 0;
-		}
-		if (umoven(tcp, tcp->u_arg[1],
-				len * sizeof *iov, (char *) iov) < 0) {
-			tprintf("%#lx", tcp->u_arg[1]);
-		} else {
-			tprintf("[");
-			for (i = 0; i < len; i++) {
-				if (i)
-					tprintf(", ");
-				tprintf("{");
-				printstr(tcp, (long) iov[i].iov_base,
-					iov[i].iov_len);
-				tprintf(", %u}", iov[i].iov_len);
-			}
-			tprintf("]");
-		}
-		free((char *) iov);
+		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;
 }
 
-#ifdef SVR4
+/* 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
 
 int
-sys_pread(tcp)
-struct tcb *tcp;
+sys_pread(struct tcb *tcp)
 {
 	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]);
 		else
 			printstr(tcp, tcp->u_arg[1], tcp->u_rval);
-		tprintf(", %lu, %llu", tcp->u_arg[2],
-				(((unsigned long long) tcp->u_arg[4]) << 32
-				 | tcp->u_arg[3]));
+		tprintf(", %lu, ", tcp->u_arg[2]);
+		printllval(tcp, "%llu", PREAD_OFFSET_ARG);
 	}
 	return 0;
 }
 
 int
-sys_pwrite(tcp)
-struct tcb *tcp;
+sys_pwrite(struct tcb *tcp)
 {
 	if (entering(tcp)) {
-		tprintf("%ld, ", tcp->u_arg[0]);
+		printfd(tcp, tcp->u_arg[0]);
+		tprints(", ");
 		printstr(tcp, tcp->u_arg[1], tcp->u_arg[2]);
-		tprintf(", %lu, %llu", tcp->u_arg[2],
-				(((unsigned long long) tcp->u_arg[4]) << 32
-				 | tcp->u_arg[3]));
+		tprintf(", %lu, ", tcp->u_arg[2]);
+		printllval(tcp, "%llu", PREAD_OFFSET_ARG);
 	}
 	return 0;
 }
-#endif /* SVR4 */
 
-#ifdef LINUX
+static void
+print_llu_from_low_high_val(struct tcb *tcp, int arg)
+{
+#if SIZEOF_LONG == SIZEOF_LONG_LONG
+	tprintf("%lu", (unsigned long) tcp->u_arg[arg]);
+#elif defined(LINUX_MIPSN32)
+	tprintf("%llu", (unsigned long long) tcp->ext_arg[arg]);
+#else
+# ifdef X32
+	if (current_personality == 0)
+		tprintf("%llu", (unsigned long long) tcp->ext_arg[arg]);
+	else
+# endif
+	tprintf("%llu",
+		((unsigned long long) (unsigned long) tcp->u_arg[arg + 1] << sizeof(long) * 8)
+		| (unsigned long long) (unsigned long) tcp->u_arg[arg]);
+#endif
+}
+
 int
-sys_pread(tcp)
-struct tcb *tcp;
+sys_preadv(struct tcb *tcp)
 {
 	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]);
+		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]);
+		print_llu_from_low_high_val(tcp, 3);
+	}
+	return 0;
+}
+
+int
+sys_pwritev(struct tcb *tcp)
+{
+	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]);
+		print_llu_from_low_high_val(tcp, 3);
+	}
+	return 0;
+}
+
+static void
+print_off_t(struct tcb *tcp, long addr)
+{
+	unsigned long offset;
+
+	if (!addr) {
+		tprints("NULL");
+		return;
+	}
+
+#if SUPPORTED_PERSONALITIES > 1 && SIZEOF_LONG > 4
+	if (current_wordsize == 4) {
+		uint32_t off;
+
+		if (umove(tcp, addr, &off) < 0)
+			tprintf("%#lx", addr);
 		else
-			printstr(tcp, tcp->u_arg[1], tcp->u_rval);
-		tprintf(", %lu, %lu", tcp->u_arg[2], tcp->u_arg[3]);
+			tprintf("[%u]", off);
+	} else
+#endif
+	if (umove(tcp, addr, &offset) < 0)
+		tprintf("%#lx", addr);
+	else
+		tprintf("[%lu]", offset);
+}
+
+int
+sys_sendfile(struct tcb *tcp)
+{
+	if (entering(tcp)) {
+		printfd(tcp, tcp->u_arg[0]);
+		tprints(", ");
+		printfd(tcp, tcp->u_arg[1]);
+		tprints(", ");
+		print_off_t(tcp, tcp->u_arg[2]);
+		tprintf(", %lu", tcp->u_arg[3]);
 	}
 	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);
+}
+
 int
-sys_pwrite(tcp)
-struct tcb *tcp;
+sys_sendfile64(struct tcb *tcp)
 {
 	if (entering(tcp)) {
-		tprintf("%ld, ", tcp->u_arg[0]);
-		printstr(tcp, tcp->u_arg[1], tcp->u_arg[2]);
-		tprintf(", %lu, %lu", tcp->u_arg[2], tcp->u_arg[3]);
+		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;
 }
 
-#endif /* LINUX */
+#include "xlat/splice_flags.h"
 
 int
-sys_ioctl(tcp)
-struct tcb *tcp;
+sys_tee(struct tcb *tcp)
 {
-	char *symbol;
+	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;
+}
 
+int
+sys_splice(struct tcb *tcp)
+{
 	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]);
+		/* 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;
+}
+
+int
+sys_vmsplice(struct tcb *tcp)
+{
+	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
+sys_ioctl(struct tcb *tcp)
+{
+	const struct_ioctlent *iop;
+
+	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
+			ioctl_print_code(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)
+		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;
 }