alpha, ia64, sh, sparc, sparc64: fix pipe and pipe2 syscalls decoding

Fix pipe syscall decoding on alpha.
Fix pipe2 syscall decoding on ia64, sh, sparc, and sparc64.

* configure.ac (AC_CHECK_FUNCS): Add pipe2.
* defs.h [ALPHA || IA64 || SH || SPARC || SPARC64] (HAVE_GETRVAL2):
Define.
* net.c (do_pipe): Check HAVE_GETRVAL2 instead of architecture macros.
Do not use getrval2 for pipe2 decoding.
Print address if umove call fails.
* syscall.c (getrval2): Check HAVE_GETRVAL2 instead of architecture
macros.  Implement for [ALPHA].
* tests/pipe.c: New file.
* tests/pipe.expected: New file.
* tests/pipe.test: New test.
* tests/Makefile.am (check_PROGRAMS): Add pipe.
(TESTS): Add pipe.test.
(EXTRA_DIST): Add pipe.expected.
* tests/.gitignore: Add pipe.

configure.ac

@@ -228,6 +228,7 @@ AC_CHECK_FUNCS(m4_normalize([
 	fputs_unlocked
 	if_indextoname
 	inet_ntop
+	pipe2
 	prctl
 	preadv
 	process_vm_readv

defs.h

@@ -424,8 +424,12 @@ extern int umoven(struct tcb *, long, unsigned int, void *);
 	umoven((pid), (addr), sizeof(*(objp)), (void *) (objp))
 extern int umovestr(struct tcb *, long, unsigned int, char *);
 extern int upeek(int pid, long, long *);
-#if defined(SPARC) || defined(SPARC64) || defined(IA64) || defined(SH)
+
+#if defined ALPHA || defined IA64 || defined SH || defined SPARC || defined SPARC64
+# define HAVE_GETRVAL2
 extern long getrval2(struct tcb *);
+#else
+# undef HAVE_GETRVAL2
 #endif
 
 extern const char *signame(const int);

net.c

@@ -1068,18 +1068,19 @@ do_pipe(struct tcb *tcp, int flags_arg)
 		if (syserror(tcp)) {
 			tprintf("%#lx", tcp->u_arg[0]);
 		} else {
-#if !defined(SPARC) && !defined(SPARC64) && !defined(SH) && !defined(IA64)
-			int fds[2];
-
-			if (umoven(tcp, tcp->u_arg[0], sizeof fds, fds) < 0)
-				tprints("[...]");
-			else
-				tprintf("[%u, %u]", fds[0], fds[1]);
-#elif defined(SPARC) || defined(SPARC64) || defined(SH) || defined(IA64)
-			tprintf("[%lu, %lu]", tcp->u_rval, getrval2(tcp));
-#else
-			tprintf("%#lx", tcp->u_arg[0]);
+#ifdef HAVE_GETRVAL2
+			if (flags_arg < 0) {
+				tprintf("[%lu, %lu]", tcp->u_rval, getrval2(tcp));
+			} else
 #endif
+			{
+				int fds[2];
+
+				if (umove(tcp, tcp->u_arg[0], &fds) < 0)
+					tprintf("%#lx", tcp->u_arg[0]);
+				else
+					tprintf("[%u, %u]", fds[0], fds[1]);
+			}
 		}
 		if (flags_arg >= 0) {
 			tprints(", ");

syscall.c

@@ -779,7 +779,7 @@ static struct user_regs_struct arc_regs;
 
 static long get_regs_error;
 
-#if defined(SPARC) || defined(SPARC64) || defined(IA64) || defined(SH)
+#ifdef HAVE_GETRVAL2
 long
 getrval2(struct tcb *tcp)
 {
@@ -790,6 +790,9 @@ getrval2(struct tcb *tcp)
 # elif defined(SH)
 	if (upeek(tcp->pid, 4*(REG_REG0+1), &val) < 0)
 		return -1;
+# elif defined ALPHA
+	if (upeek(tcp->pid, 20, &val) < 0)
+		return -1;
 # elif defined(IA64)
 	val = ia64_regs.gr[9];
 # endif

tests/.gitignore

@@ -13,6 +13,7 @@ net-accept-connect
 netlink_inet_diag
 netlink_unix_diag
 pc
+pipe
 scm_rights
 seccomp
 select

tests/Makefile.am

@@ -22,6 +22,7 @@ check_PROGRAMS = \
 	netlink_inet_diag \
 	netlink_unix_diag \
 	pc \
+	pipe \
 	scm_rights \
 	seccomp \
 	select \
@@ -74,6 +75,7 @@ TESTS = \
 	net.test \
 	net-fd.test \
 	net-yy.test \
+	pipe.test \
 	pc.test \
 	sun_path.test \
 	unix-yy.test \
@@ -105,6 +107,7 @@ EXTRA_DIST = init.sh run.sh match.awk \
 	     net-fd.expected \
 	     net-yy-accept.awk \
 	     net-yy-connect.awk \
+	     pipe.expected \
 	     select.awk \
 	     sigaction.awk \
 	     statfs.expected \

tests/pipe.c

@@ -0,0 +1,27 @@
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include <stdio.h>
+#include <fcntl.h>
+#include <unistd.h>
+
+int
+main(void)
+{
+	(void) close(0);
+	(void) close(1);
+	int fds[2];
+	if (pipe(fds) || fds[0] != 0 || fds[1] != 1)
+		return 77;
+
+#ifdef HAVE_PIPE2
+	(void) close(0);
+	(void) close(1);
+	if (pipe2(fds, O_NONBLOCK) || fds[0] != 0 || fds[1] != 1)
+		return 77;
+	return 0;
+#else
+	return 77;
+#endif
+}

tests/pipe.expected

@@ -0,0 +1,2 @@
+pipe(\(\[0, 1\]|2\(\[0, 1\], 0)\) += 0
+pipe2\(\[0, 1\], O_NONBLOCK\) += 0

tests/pipe.test

@@ -0,0 +1,16 @@
+#!/bin/sh
+
+# Check pipe/pipe2 syscalls decoding.
+
+. "${srcdir=.}/init.sh"
+
+syscall=pipe2
+for n in pipe; do
+	$STRACE -e$n -h > /dev/null && syscall=$syscall,$n
+done
+
+run_prog
+run_strace -e$syscall $args
+match_grep
+
+exit 0