X-Git-Url: https://granicus.if.org/sourcecode?a=blobdiff_plain;f=io.c;h=58323a7c708435bb005b9c1972ed646b66db01e3;hb=4ddbfcfb3cc2c6d5feb335a0b7055717b5ef7ec7;hp=2a36c000d001b5075d73ed9eadeea3ceb088dea2;hpb=924996a41e54a3ac6bb90a43a8cebbbf6c0e1319;p=strace

diff --git a/io.c b/io.c
index 2a36c000..58323a7c 100644
--- a/io.c
+++ b/io.c
@@ -32,15 +32,14 @@
 #include <fcntl.h>
 #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]);
@@ -48,16 +47,61 @@ sys_read(struct tcb *tcp)
 	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]);
+	printfd(tcp, tcp->u_arg[0]);
+	tprints(", ");
+	printstr(tcp, tcp->u_arg[1], tcp->u_arg[2]);
+	tprintf(", %lu", tcp->u_arg[2]);
+
+	return RVAL_DECODED;
+}
+
+struct print_iovec_config {
+	enum iov_decode decode_iov;
+	unsigned long data_size;
+};
+
+static bool
+print_iovec(struct tcb *tcp, void *elem_buf, size_t elem_size, void *data)
+{
+	const unsigned long *iov;
+	unsigned long iov_buf[2], len;
+	struct print_iovec_config *c = data;
+
+        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 {
+		iov = elem_buf;
 	}
-	return 0;
+
+	tprints("{iov_base=");
+
+	len = iov[1];
+
+	switch (c->decode_iov) {
+		case IOV_DECODE_STR:
+			if (len > c->data_size)
+				len = c->data_size;
+			c->data_size -= len;
+			printstr(tcp, iov[0], len);
+			break;
+		case IOV_DECODE_NETLINK:
+			if (len > c->data_size)
+				len = c->data_size;
+			c->data_size -= len;
+			decode_netlink(tcp, iov[0], iov[1]);
+			break;
+		default:
+			printaddr(iov[0]);
+			break;
+	}
+
+	tprintf(", iov_len=%lu}", iov[1]);
+
+	return true;
 }
 
 /*
@@ -65,111 +109,45 @@ sys_write(struct tcb *tcp)
  * 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)
+tprint_iov_upto(struct tcb *tcp, unsigned long len, unsigned long addr,
+		enum iov_decode 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;
+	unsigned long iov[2];
+	struct print_iovec_config config =
+		{ .decode_iov = decode_iov, .data_size = data_size };
 
-	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
+	print_array(tcp, addr, len, iov, current_wordsize * 2,
+		    umoven_or_printaddr, print_iovec, &config);
 }
 
 void
-tprint_iov(struct tcb *tcp, unsigned long len, unsigned long addr, int decode_iov)
+tprint_iov(struct tcb *tcp, unsigned long len, unsigned long addr,
+	   enum iov_decode decode_iov)
 {
 	tprint_iov_upto(tcp, len, addr, decode_iov, (unsigned long) -1L);
 }
 
-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);
+		tprint_iov_upto(tcp, tcp->u_arg[2], tcp->u_arg[1],
+				IOV_DECODE_STR, tcp->u_rval);
 		tprintf(", %lu", 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;
+	printfd(tcp, tcp->u_arg[0]);
+	tprints(", ");
+	tprint_iov(tcp, tcp->u_arg[2], tcp->u_arg[1], IOV_DECODE_STR);
+	tprintf(", %lu", tcp->u_arg[2]);
+
+	return RVAL_DECODED;
 }
 
 /* The SH4 ABI does allow long longs in odd-numbered registers, but
@@ -183,236 +161,178 @@ sys_writev(struct tcb *tcp)
 #define PREAD_OFFSET_ARG 3
 #endif
 
-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);
+		printllval(tcp, "%lld", PREAD_OFFSET_ARG);
 	}
 	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);
-	}
-	return 0;
+	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, "%lld", PREAD_OFFSET_ARG);
+
+	return RVAL_DECODED;
 }
 
 static void
-print_llu_from_low_high_val(struct tcb *tcp, int arg)
+print_lld_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]);
+#if SIZEOF_LONG > 4 && SIZEOF_LONG == SIZEOF_LONG_LONG
+# if SUPPORTED_PERSONALITIES > 1
+#  ifdef X86_64
+	if (current_personality != 1)
+#  else
+	if (current_wordsize == sizeof(long))
+#  endif
+# endif
+		tprintf("%ld", tcp->u_arg[arg]);
+# if SUPPORTED_PERSONALITIES > 1
 	else
+		tprintf("%ld",
+			((unsigned long) tcp->u_arg[arg + 1] << current_wordsize * 8)
+			| (unsigned long) tcp->u_arg[arg]);
+# endif
+#elif SIZEOF_LONG > 4
+# error Unsupported configuration: SIZEOF_LONG > 4 && SIZEOF_LONG_LONG > SIZEOF_LONG
+#elif HAVE_STRUCT_TCB_EXT_ARG
+# if SUPPORTED_PERSONALITIES > 1
+	if (current_personality == 1) {
+		tprintf("%lld",
+			(widen_to_ull(tcp->u_arg[arg + 1]) << sizeof(long) * 8)
+			| widen_to_ull(tcp->u_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]);
+	{
+		tprintf("%lld", tcp->ext_arg[arg]);
+	}
+#else /* SIZEOF_LONG_LONG > SIZEOF_LONG && !HAVE_STRUCT_TCB_EXT_ARG */
+	tprintf("%lld",
+		(widen_to_ull(tcp->u_arg[arg + 1]) << sizeof(long) * 8)
+		| widen_to_ull(tcp->u_arg[arg]));
 #endif
 }
 
-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;
-		}
-		tprint_iov(tcp, tcp->u_arg[2], tcp->u_arg[1], 1);
+		tprint_iov_upto(tcp, tcp->u_arg[2], tcp->u_arg[1], IOV_DECODE_STR,
+				tcp->u_rval);
 		tprintf(", %lu, ", tcp->u_arg[2]);
-		print_llu_from_low_high_val(tcp, 3);
+		print_lld_from_low_high_val(tcp, 3);
+		if (flags_arg >= 0) {
+			tprints(", ");
+			printflags(rwf_flags, tcp->u_arg[flags_arg], "RWF_???");
+		}
 	}
 	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]);
-		print_llu_from_low_high_val(tcp, 3);
-	}
-	return 0;
+	return do_preadv(tcp, -1);
 }
 
-static void
-print_off_t(struct tcb *tcp, long addr)
+SYS_FUNC(preadv2)
 {
-	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
-			tprintf("[%u]", off);
-	} else
-#endif
-	if (umove(tcp, addr, &offset) < 0)
-		tprintf("%#lx", addr);
-	else
-		tprintf("[%lu]", offset);
+	return do_preadv(tcp, 5);
 }
 
-int
-sys_sendfile(struct tcb *tcp)
+static int
+do_pwritev(struct tcb *tcp, const int flags_arg)
 {
-	if (entering(tcp)) {
-		printfd(tcp, tcp->u_arg[0]);
-		tprints(", ");
-		printfd(tcp, tcp->u_arg[1]);
+	printfd(tcp, tcp->u_arg[0]);
+	tprints(", ");
+	tprint_iov(tcp, tcp->u_arg[2], tcp->u_arg[1], IOV_DECODE_STR);
+	tprintf(", %lu, ", tcp->u_arg[2]);
+	print_lld_from_low_high_val(tcp, 3);
+	if (flags_arg >= 0) {
 		tprints(", ");
-		print_off_t(tcp, tcp->u_arg[2]);
-		tprintf(", %lu", tcp->u_arg[3]);
+		printflags(rwf_flags, tcp->u_arg[flags_arg], "RWF_???");
 	}
-	return 0;
+
+	return RVAL_DECODED;
 }
 
-void
-print_loff_t(struct tcb *tcp, long addr)
+SYS_FUNC(pwritev)
 {
-	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 do_pwritev(tcp, -1);
 }
 
-int
-sys_sendfile64(struct tcb *tcp)
+SYS_FUNC(pwritev2)
 {
-	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, 5);
 }
 
 #include "xlat/splice_flags.h"
 
-int
-sys_tee(struct tcb *tcp)
+SYS_FUNC(tee)
 {
-	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 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_???");
 
-int
-sys_splice(struct tcb *tcp)
-{
-	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 RVAL_DECODED;
 }
 
-int
-sys_vmsplice(struct tcb *tcp)
+SYS_FUNC(splice)
 {
-	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(", ");
+	/* 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("%lu, ", tcp->u_arg[4]);
+	/* unsigned int flags */
+	printflags(splice_flags, tcp->u_arg[5], "SPLICE_F_???");
+
+	return RVAL_DECODED;
 }
 
-int
-sys_ioctl(struct tcb *tcp)
+SYS_FUNC(vmsplice)
 {
-	const struct_ioctlent *iop;
+	/* 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(", %lu, ", tcp->u_arg[2]);
+	/* unsigned int flags */
+	printflags(splice_flags, tcp->u_arg[3], "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
-			ioctl_print_code(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;
 }