From 114aeee03b46e0eaabd878baaa000f0ce70b850d Mon Sep 17 00:00:00 2001
From: John Baldwin <jhb@FreeBSD.org>
Date: Thu, 8 Jun 2017 08:10:57 +0000
Subject: [PATCH] Decode arguments passed to msync().

---
 usr.bin/truss/syscall.h  | 2 +-
 usr.bin/truss/syscalls.c | 5 +++++
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/usr.bin/truss/syscall.h b/usr.bin/truss/syscall.h
index fe1d470412cb..d99d0c89a321 100644
--- a/usr.bin/truss/syscall.h
+++ b/usr.bin/truss/syscall.h
@@ -49,7 +49,7 @@ enum Argtype { None = 1, Hex, Octal, Int, UInt, LongHex, Name, Ptr, Stat, Ioctl,
 	CapFcntlRights, Fadvice, FileFlags, Flockop, Getfsstatmode, Kldsymcmd,
 	Kldunloadflags, Sizet, Madvice, Socklent, Sockprotocol, Sockoptlevel,
 	Sockoptname, Msgflags, CapRights, PUInt, PQuadHex, Acltype,
-	Extattrnamespace, Minherit, Mlockall, Mountflags,
+	Extattrnamespace, Minherit, Mlockall, Mountflags, Msync,
 
 	CloudABIAdvice, CloudABIClockID, ClouduABIFDSFlags,
 	CloudABIFDStat, CloudABIFileStat, CloudABIFileType,
diff --git a/usr.bin/truss/syscalls.c b/usr.bin/truss/syscalls.c
index e213bbde84ba..5f9274eaefa9 100644
--- a/usr.bin/truss/syscalls.c
+++ b/usr.bin/truss/syscalls.c
@@ -326,6 +326,8 @@ static struct syscall decoded_syscalls[] = {
 	  .args = { { Name, 0 }, { Name, 1 }, { Mountflags, 2 }, { Ptr, 3 } } },
 	{ .name = "mprotect", .ret_type = 1, .nargs = 3,
 	  .args = { { Ptr, 0 }, { Sizet, 1 }, { Mprot, 2 } } },
+	{ .name = "msync", .ret_type = 1, .nargs = 3,
+	  .args = { { Ptr, 0 }, { Sizet, 1 }, { Msync, 2 } } },
 	{ .name = "munlock", .ret_type = 1, .nargs = 2,
 	  .args = { { Ptr, 0 }, { Sizet, 1 } } },
 	{ .name = "munmap", .ret_type = 1, .nargs = 2,
@@ -2118,6 +2120,9 @@ print_arg(struct syscall_args *sc, unsigned long *args, long *retval,
 	case Mountflags:
 		print_mask_arg(sysdecode_mount_flags, fp, args[sc->offset]);
 		break;
+	case Msync:
+		print_mask_arg(sysdecode_msync_flags, fp, args[sc->offset]);
+		break;
 
 	case CloudABIAdvice:
 		fputs(xlookup(cloudabi_advice, args[sc->offset]), fp);