Index: lib/libsysdecode/flags.c
===================================================================
--- lib/libsysdecode/flags.c
+++ lib/libsysdecode/flags.c
@@ -1277,3 +1277,10 @@
 		}
 	}
 }
+
+bool
+sysdecode_shm_open2_flags(FILE *fp, int flags, int *rem)
+{
+
+	return (print_mask_0(fp, shmflags, flags, rem));
+}
Index: lib/libsysdecode/mktables
===================================================================
--- lib/libsysdecode/mktables
+++ lib/libsysdecode/mktables
@@ -165,6 +165,7 @@
 else
 	gen_table "sysarchnum" "[A-Z_]+[[:space:]]+[0-9]+"                 "machine/sysarch.h"
 fi
+gen_table "shmflags"  "SHM_[A-Z_]+[[:space:]]+0x[0-9]+"                    "sys/mman.h"         "SHM_ANON"
 
 # Generate a .depend file for our output file
 if [ -n "$output_file" ]; then
Index: lib/libsysdecode/sysdecode.h
===================================================================
--- lib/libsysdecode/sysdecode.h
+++ lib/libsysdecode/sysdecode.h
@@ -128,5 +128,6 @@
 bool	sysdecode_wait4_options(FILE *_fp, int _options, int *_rem);
 bool	sysdecode_wait6_options(FILE *_fp, int _options, int *_rem);
 const char *sysdecode_whence(int _whence);
+bool	sysdecode_shm_open2_flags(FILE *_fp, int _flags, int *_rem);
 
 #endif /* !__SYSDECODE_H__ */
Index: usr.bin/kdump/kdump.c
===================================================================
--- usr.bin/kdump/kdump.c
+++ usr.bin/kdump/kdump.c
@@ -1257,6 +1257,18 @@
 				narg -= 2;
 				break;
 #endif
+			case SYS_shm_open2:
+				print_number(ip, narg, c);
+				putchar(',');
+				print_mask_arg(sysdecode_open_flags, ip[0]);
+				putchar(',');
+				decode_filemode(ip[1]);
+				putchar(',');
+				print_mask_arg(sysdecode_shm_open2_flags,
+				    ip[2]);
+				ip += 3;
+				narg -= 3;
+				break;
 			case SYS_minherit:
 				print_number(ip, narg, c);
 				print_number(ip, narg, c);
Index: usr.bin/truss/syscalls.c
===================================================================
--- usr.bin/truss/syscalls.c
+++ usr.bin/truss/syscalls.c
@@ -471,6 +471,9 @@
 		    { Ptr | IN, 3 }, { Socklent, 4 } } },
 	{ .name = "shm_open", .ret_type = 1, .nargs = 3,
 	  .args = { { ShmName | IN, 0 }, { Open, 1 }, { Octal, 2 } } },
+	{ .name = "shm_open2", .ret_type = 1, .nargs = 5,
+	  .args = { { ShmName | IN, 0 }, { Open, 1 }, { Octal, 2 },
+		    { Hex, 3 }, { BinString | IN, 4 } } },
 	{ .name = "shm_rename", .ret_type = 1, .nargs = 3,
 	  .args = { { Name | IN, 0 }, { Name | IN, 1 }, { Hex, 2 } } },
 	{ .name = "shm_unlink", .ret_type = 1, .nargs = 1,