From: Dmitry V. Levin <ldv@altlinux.org>
Date: Sun, 22 Nov 2015 18:35:27 +0000 (+0000)
Subject: Implement kcmp syscall decoding
X-Git-Tag: v4.11~124
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=7aa9c0d2999671aa018172e41d52a55ddeac1723;p=strace

Implement kcmp syscall decoding

* kcmp.c: New file.
* Makefile.am (strace_SOURCES): Add it.
* linux/dummy.h (sys_kcmp): Remove stub alias.
* xlat/kcmp_types.in: New file.
---

diff --git a/Makefile.am b/Makefile.am
index f4271adc..92dbc10b 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -82,6 +82,7 @@ strace_SOURCES =	\
 	ipc_sem.c	\
 	ipc_shm.c	\
 	ipc_shmctl.c	\
+	kcmp.c		\
 	kexec.c		\
 	keyctl.c	\
 	ldt.c		\
diff --git a/kcmp.c b/kcmp.c
new file mode 100644
index 00000000..aba5a613
--- /dev/null
+++ b/kcmp.c
@@ -0,0 +1,31 @@
+#include "defs.h"
+#include "xlat/kcmp_types.h"
+
+SYS_FUNC(kcmp)
+{
+	pid_t pid1 = tcp->u_arg[0];
+	pid_t pid2 = tcp->u_arg[1];
+	int type = tcp->u_arg[2];
+	unsigned long idx1 = tcp->u_arg[3];
+	unsigned long idx2 = tcp->u_arg[4];
+
+	tprintf("%d, %d, ", pid1, pid2);
+	printxval(kcmp_types, type, "KCMP_???");
+
+	switch(type) {
+		case KCMP_FILE:
+			tprintf(", %u, %u", (unsigned) idx1, (unsigned) idx2);
+			break;
+		case KCMP_FILES:
+		case KCMP_FS:
+		case KCMP_IO:
+		case KCMP_SIGHAND:
+		case KCMP_SYSVSEM:
+		case KCMP_VM:
+			break;
+		default:
+			tprintf(", %#lx, %#lx", idx1, idx2);
+	}
+
+	return RVAL_DECODED;
+}
diff --git a/linux/dummy.h b/linux/dummy.h
index 65f6f245..e9947457 100644
--- a/linux/dummy.h
+++ b/linux/dummy.h
@@ -32,7 +32,6 @@
 #endif
 
 /* still unfinished */
-#define	sys_kcmp		printargs
 #define	sys_kexec_file_load	printargs
 #define	sys_lookup_dcookie	printargs
 #define	sys_name_to_handle_at	printargs
diff --git a/xlat/kcmp_types.in b/xlat/kcmp_types.in
new file mode 100644
index 00000000..4357776c
--- /dev/null
+++ b/xlat/kcmp_types.in
@@ -0,0 +1,7 @@
+KCMP_FILE	0
+KCMP_VM		1
+KCMP_FILES	2
+KCMP_FS		3
+KCMP_SIGHAND	4
+KCMP_IO		5
+KCMP_SYSVSEM	6