From: Dmitry V. Levin <ldv@altlinux.org>
Date: Sun, 22 Nov 2015 19:28:17 +0000 (+0000)
Subject: Implement lookup_dcookie syscall decoding
X-Git-Tag: v4.11~122
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=60d752409019d5e2db990757d036244850196219;p=strace

Implement lookup_dcookie syscall decoding

* lookup_dcookie.c: New file.
* Makefile.am (strace_SOURCES): Add it.
* linux/dummy.h (sys_lookup_dcookie): Remove stub alias.
---

diff --git a/Makefile.am b/Makefile.am
index 92dbc10b..56f49421 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -87,6 +87,7 @@ strace_SOURCES =	\
 	keyctl.c	\
 	ldt.c		\
 	link.c		\
+	lookup_dcookie.c \
 	loop.c		\
 	lseek.c		\
 	mem.c		\
diff --git a/linux/dummy.h b/linux/dummy.h
index 238d72c0..3914948a 100644
--- a/linux/dummy.h
+++ b/linux/dummy.h
@@ -32,7 +32,6 @@
 #endif
 
 /* still unfinished */
-#define	sys_lookup_dcookie	printargs
 #define	sys_name_to_handle_at	printargs
 #define	sys_open_by_handle_at	printargs
 #define	sys_sysfs		printargs
diff --git a/lookup_dcookie.c b/lookup_dcookie.c
new file mode 100644
index 00000000..c6482b33
--- /dev/null
+++ b/lookup_dcookie.c
@@ -0,0 +1,22 @@
+#include "defs.h"
+
+SYS_FUNC(lookup_dcookie)
+{
+	if (entering(tcp))
+		return 0;
+
+	/* cookie */
+	int argn = printllval(tcp, "%llu", 0);
+	tprints(", ");
+
+	/* buffer */
+	if (syserror(tcp))
+		printaddr(tcp->u_arg[argn]);
+	else
+		printstr(tcp, tcp->u_arg[argn], tcp->u_rval);
+
+	/* len */
+	tprintf(", %lu", tcp->u_arg[argn + 1]);
+
+	return 0;
+}