diff --git a/gas/config/tc-aarch64.c b/gas/config/tc-aarch64.c
index c230b1e..34764b3 100644
--- a/gas/config/tc-aarch64.c
+++ b/gas/config/tc-aarch64.c
@@ -230,6 +230,12 @@ set_fatal_syntax_error (const char *error)
 {
   set_error (AARCH64_OPDE_FATAL_SYNTAX_ERROR, error);
 }
+
+static inline void
+set_other_error (const char *error)
+{
+  set_error (AARCH64_OPDE_OTHER_ERROR, error);
+}
 
 /* Number of littlenums required to hold an extended precision number.  */
 #define MAX_LITTLENUMS 6
@@ -3267,13 +3273,15 @@ parse_barrier (char **str)
 }
 
 /* Parse a system register or a PSTATE field name for an MSR/MRS instruction.
-   Returns the encoding for the option, or PARSE_FAIL.
+   Returns the encoding for the option, or PARSE_FAIL.  If SYS_REG is not
+   NULL, return in *SYS_REG the found descriptor.
 
    If IMPLE_DEFINED_P is non-zero, the function will also try to parse the
    implementation defined system register name S3_<op1>_<Cn>_<Cm>_<op2>.  */
 
 static int
-parse_sys_reg (char **str, struct hash_control *sys_regs, int imple_defined_p)
+parse_sys_reg (char **str, struct hash_control *sys_regs, int imple_defined_p,
+	       const aarch64_sys_reg ** sys_reg)
 {
   char *p, *q;
   char buf[32];
@@ -3320,6 +3328,9 @@ parse_sys_reg (char **str, struct hash_control *sys_regs, int imple_defined_p)
       value = o->value;
     }
 
+  if (sys_reg)
+    *sys_reg = o;
+
   *str = q;
   return value;
 }
@@ -5180,17 +5191,31 @@ parse_operands (char *str, const aarch64_opcode *opcode)
 	  break;
 
 	case AARCH64_OPND_SYSREG:
-	  if ((val = parse_sys_reg (&str, aarch64_sys_regs_hsh, 1))
-	      == PARSE_FAIL)
 	    {
-	      set_syntax_error (_("unknown or missing system register name"));
-	      goto failure;
+	      const aarch64_sys_reg *sys_reg = NULL;
+	      if ((val = parse_sys_reg (&str, aarch64_sys_regs_hsh, 1,
+					&sys_reg))
+		  == PARSE_FAIL)
+		{
+		  set_syntax_error (_("unknown or missing system register name"));
+		  goto failure;
+		}
+	      else if (sys_reg && i == 0 && aarch64_sys_reg_readonly_p (sys_reg))
+		{
+		  set_other_error (_("read-only register"));
+		  goto failure;
+		}
+	      else if (sys_reg && i == 1 && aarch64_sys_reg_writeonly_p (sys_reg))
+		{
+		  set_other_error (_("write-only register"));
+		  goto failure;
+		}
+	      inst.base.operands[i].sysreg = val;
 	    }
-	  inst.base.operands[i].sysreg = val;
 	  break;
 
 	case AARCH64_OPND_PSTATEFIELD:
-	  if ((val = parse_sys_reg (&str, aarch64_pstatefield_hsh, 0))
+	  if ((val = parse_sys_reg (&str, aarch64_pstatefield_hsh, 0, NULL))
 	      == PARSE_FAIL)
 	    {
 	      set_syntax_error (_("unknown or missing PSTATE field name"));
diff --git a/gas/testsuite/gas/aarch64/diagnostic.l b/gas/testsuite/gas/aarch64/diagnostic.l
index 00a0d7a..b8bffb3 100644
--- a/gas/testsuite/gas/aarch64/diagnostic.l
+++ b/gas/testsuite/gas/aarch64/diagnostic.l
@@ -97,3 +97,6 @@
 [^:]*:99: Error: operand 3 should be one of the standard conditions, excluding AL and NV. -- `cinc w0,w1,nv'
 [^:]*:100: Error: operand 2 should be one of the standard conditions, excluding AL and NV. -- `cset w0,al'
 [^:]*:101: Error: operand 2 should be one of the standard conditions, excluding AL and NV. -- `cset w0,nv'
+[^:]*:102: Error: read-only register at operand 1 -- `msr trcidr7,x7'
+[^:]*:103: Error: write-only register at operand 2 -- `mrs x7,trcoslar'
+
diff --git a/gas/testsuite/gas/aarch64/diagnostic.s b/gas/testsuite/gas/aarch64/diagnostic.s
index 2bb16b0..3537f82 100644
--- a/gas/testsuite/gas/aarch64/diagnostic.s
+++ b/gas/testsuite/gas/aarch64/diagnostic.s
@@ -99,3 +99,5 @@
 	cinc	w0, w1, nv
 	cset	w0, al
 	cset	w0, nv
+	msr	trcidr7, x7
+	mrs	x7, trcoslar
diff --git a/gas/testsuite/gas/aarch64/tracereg-illegal.d b/gas/testsuite/gas/aarch64/tracereg-illegal.d
new file mode 100644
index 0000000..7de20c4
--- /dev/null
+++ b/gas/testsuite/gas/aarch64/tracereg-illegal.d
@@ -0,0 +1,4 @@
+#name: Trace Unit Registers - Illegal Read/Write
+#as:
+#source: tracereg-illegal.s
+#error-output: tracereg-illegal.l
diff --git a/gas/testsuite/gas/aarch64/tracereg-illegal.l b/gas/testsuite/gas/aarch64/tracereg-illegal.l
new file mode 100644
index 0000000..849bd0e
--- /dev/null
+++ b/gas/testsuite/gas/aarch64/tracereg-illegal.l
@@ -0,0 +1,39 @@
+[^:]*: Assembler messages:
+[^:]*:35: Error: .*`msr trcstatr,x7'
+[^:]*:36: Error: .*`msr trcidr8,x7'
+[^:]*:37: Error: .*`msr trcidr9,x7'
+[^:]*:38: Error: .*`msr trcidr10,x7'
+[^:]*:39: Error: .*`msr trcidr11,x7'
+[^:]*:40: Error: .*`msr trcidr12,x7'
+[^:]*:41: Error: .*`msr trcidr13,x7'
+[^:]*:42: Error: .*`msr trcidr0,x7'
+[^:]*:43: Error: .*`msr trcidr1,x7'
+[^:]*:44: Error: .*`msr trcidr2,x7'
+[^:]*:45: Error: .*`msr trcidr3,x7'
+[^:]*:46: Error: .*`msr trcidr4,x7'
+[^:]*:47: Error: .*`msr trcidr5,x7'
+[^:]*:48: Error: .*`msr trcidr6,x7'
+[^:]*:49: Error: .*`msr trcidr7,x7'
+[^:]*:50: Error: .*`mrs x7,trcoslar'
+[^:]*:51: Error: .*`msr trcoslsr,x7'
+[^:]*:52: Error: .*`msr trcpdsr,x7'
+[^:]*:53: Error: .*`msr trcdevaff0,x7'
+[^:]*:54: Error: .*`msr trcdevaff1,x7'
+[^:]*:55: Error: .*`mrs x7,trclar'
+[^:]*:56: Error: .*`msr trclsr,x7'
+[^:]*:57: Error: .*`msr trcauthstatus,x7'
+[^:]*:58: Error: .*`msr trcdevarch,x7'
+[^:]*:59: Error: .*`msr trcdevid,x7'
+[^:]*:60: Error: .*`msr trcdevtype,x7'
+[^:]*:61: Error: .*`msr trcpidr4,x7'
+[^:]*:62: Error: .*`msr trcpidr5,x7'
+[^:]*:63: Error: .*`msr trcpidr6,x7'
+[^:]*:64: Error: .*`msr trcpidr7,x7'
+[^:]*:65: Error: .*`msr trcpidr0,x7'
+[^:]*:66: Error: .*`msr trcpidr1,x7'
+[^:]*:67: Error: .*`msr trcpidr2,x7'
+[^:]*:68: Error: .*`msr trcpidr3,x7'
+[^:]*:69: Error: .*`msr trccidr0,x7'
+[^:]*:70: Error: .*`msr trccidr1,x7'
+[^:]*:71: Error: .*`msr trccidr2,x7'
+[^:]*:72: Error: .*`msr trccidr3,x7'
diff --git a/gas/testsuite/gas/aarch64/tracereg-illegal.s b/gas/testsuite/gas/aarch64/tracereg-illegal.s
new file mode 100644
index 0000000..fca807f
--- /dev/null
+++ b/gas/testsuite/gas/aarch64/tracereg-illegal.s
@@ -0,0 +1,72 @@
+/* tracereg-illegal.s Test file for AArch64 trace unit registers.
+   Reject writing to registers that are read-only and reading from
+   registers that are write-only.
+
+   Copyright 2013 Free Software Foundation, Inc.
+   Contributed by ARM Ltd.
+
+   This file is part of GAS.
+
+   GAS is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the license, or
+   (at your option) any later version.
+
+   GAS is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; see the file COPYING3. If not,
+   see <http://www.gnu.org/licenses/>.  */
+
+	.macro rw_sys_reg sys_reg xreg r w
+	.ifc \w, 1
+	msr \sys_reg, \xreg
+	.endif
+	.ifc \r, 1
+	mrs \xreg, \sys_reg
+	.endif
+	.endm
+
+	.text
+
+	rw_sys_reg sys_reg=trcstatr xreg=x7 r=0 w=1
+	rw_sys_reg sys_reg=trcidr8 xreg=x7 r=0 w=1
+	rw_sys_reg sys_reg=trcidr9 xreg=x7 r=0 w=1
+	rw_sys_reg sys_reg=trcidr10 xreg=x7 r=0 w=1
+	rw_sys_reg sys_reg=trcidr11 xreg=x7 r=0 w=1
+	rw_sys_reg sys_reg=trcidr12 xreg=x7 r=0 w=1
+	rw_sys_reg sys_reg=trcidr13 xreg=x7 r=0 w=1
+	rw_sys_reg sys_reg=trcidr0 xreg=x7 r=0 w=1
+	rw_sys_reg sys_reg=trcidr1 xreg=x7 r=0 w=1
+	rw_sys_reg sys_reg=trcidr2 xreg=x7 r=0 w=1
+	rw_sys_reg sys_reg=trcidr3 xreg=x7 r=0 w=1
+	rw_sys_reg sys_reg=trcidr4 xreg=x7 r=0 w=1
+	rw_sys_reg sys_reg=trcidr5 xreg=x7 r=0 w=1
+	rw_sys_reg sys_reg=trcidr6 xreg=x7 r=0 w=1
+	rw_sys_reg sys_reg=trcidr7 xreg=x7 r=0 w=1
+	rw_sys_reg sys_reg=trcoslar xreg=x7 r=1 w=0
+	rw_sys_reg sys_reg=trcoslsr xreg=x7 r=0 w=1
+	rw_sys_reg sys_reg=trcpdsr xreg=x7 r=0 w=1
+	rw_sys_reg sys_reg=trcdevaff0 xreg=x7 r=0 w=1
+	rw_sys_reg sys_reg=trcdevaff1 xreg=x7 r=0 w=1
+	rw_sys_reg sys_reg=trclar xreg=x7 r=1 w=0
+	rw_sys_reg sys_reg=trclsr xreg=x7 r=0 w=1
+	rw_sys_reg sys_reg=trcauthstatus xreg=x7 r=0 w=1
+	rw_sys_reg sys_reg=trcdevarch xreg=x7 r=0 w=1
+	rw_sys_reg sys_reg=trcdevid xreg=x7 r=0 w=1
+	rw_sys_reg sys_reg=trcdevtype xreg=x7 r=0 w=1
+	rw_sys_reg sys_reg=trcpidr4 xreg=x7 r=0 w=1
+	rw_sys_reg sys_reg=trcpidr5 xreg=x7 r=0 w=1
+	rw_sys_reg sys_reg=trcpidr6 xreg=x7 r=0 w=1
+	rw_sys_reg sys_reg=trcpidr7 xreg=x7 r=0 w=1
+	rw_sys_reg sys_reg=trcpidr0 xreg=x7 r=0 w=1
+	rw_sys_reg sys_reg=trcpidr1 xreg=x7 r=0 w=1
+	rw_sys_reg sys_reg=trcpidr2 xreg=x7 r=0 w=1
+	rw_sys_reg sys_reg=trcpidr3 xreg=x7 r=0 w=1
+	rw_sys_reg sys_reg=trccidr0 xreg=x7 r=0 w=1
+	rw_sys_reg sys_reg=trccidr1 xreg=x7 r=0 w=1
+	rw_sys_reg sys_reg=trccidr2 xreg=x7 r=0 w=1
+	rw_sys_reg sys_reg=trccidr3 xreg=x7 r=0 w=1
diff --git a/gas/testsuite/gas/aarch64/tracereg.d b/gas/testsuite/gas/aarch64/tracereg.d
new file mode 100644
index 0000000..4655e2e
--- /dev/null
+++ b/gas/testsuite/gas/aarch64/tracereg.d
@@ -0,0 +1,389 @@
+#objdump: -dr
+
+.*:     file format .*
+
+Disassembly of section \.text:
+
+0000000000000000 <.*>:
+   0:	d5110107 	msr	trcprgctlr, x7
+   4:	d5310107 	mrs	x7, trcprgctlr
+   8:	d5110207 	msr	trcprocselr, x7
+   c:	d5310207 	mrs	x7, trcprocselr
+  10:	d5310307 	mrs	x7, trcstatr
+  14:	d5110407 	msr	trcconfigr, x7
+  18:	d5310407 	mrs	x7, trcconfigr
+  1c:	d5110607 	msr	trcauxctlr, x7
+  20:	d5310607 	mrs	x7, trcauxctlr
+  24:	d5110807 	msr	trceventctl0r, x7
+  28:	d5310807 	mrs	x7, trceventctl0r
+  2c:	d5110907 	msr	trceventctl1r, x7
+  30:	d5310907 	mrs	x7, trceventctl1r
+  34:	d5110b07 	msr	trcstallctlr, x7
+  38:	d5310b07 	mrs	x7, trcstallctlr
+  3c:	d5110c07 	msr	trctsctlr, x7
+  40:	d5310c07 	mrs	x7, trctsctlr
+  44:	d5110d07 	msr	trcsyncpr, x7
+  48:	d5310d07 	mrs	x7, trcsyncpr
+  4c:	d5110e07 	msr	trcccctlr, x7
+  50:	d5310e07 	mrs	x7, trcccctlr
+  54:	d5110f07 	msr	trcbbctlr, x7
+  58:	d5310f07 	mrs	x7, trcbbctlr
+  5c:	d5110027 	msr	trctraceidr, x7
+  60:	d5310027 	mrs	x7, trctraceidr
+  64:	d5110127 	msr	trcqctlr, x7
+  68:	d5310127 	mrs	x7, trcqctlr
+  6c:	d5110047 	msr	trcvictlr, x7
+  70:	d5310047 	mrs	x7, trcvictlr
+  74:	d5110147 	msr	trcviiectlr, x7
+  78:	d5310147 	mrs	x7, trcviiectlr
+  7c:	d5110247 	msr	trcvissctlr, x7
+  80:	d5310247 	mrs	x7, trcvissctlr
+  84:	d5110347 	msr	trcvipcssctlr, x7
+  88:	d5310347 	mrs	x7, trcvipcssctlr
+  8c:	d5110847 	msr	trcvdctlr, x7
+  90:	d5310847 	mrs	x7, trcvdctlr
+  94:	d5110947 	msr	trcvdsacctlr, x7
+  98:	d5310947 	mrs	x7, trcvdsacctlr
+  9c:	d5110a47 	msr	trcvdarcctlr, x7
+  a0:	d5310a47 	mrs	x7, trcvdarcctlr
+  a4:	d5110087 	msr	trcseqevr0, x7
+  a8:	d5310087 	mrs	x7, trcseqevr0
+  ac:	d5110187 	msr	trcseqevr1, x7
+  b0:	d5310187 	mrs	x7, trcseqevr1
+  b4:	d5110287 	msr	trcseqevr2, x7
+  b8:	d5310287 	mrs	x7, trcseqevr2
+  bc:	d5110687 	msr	trcseqrstevr, x7
+  c0:	d5310687 	mrs	x7, trcseqrstevr
+  c4:	d5110787 	msr	trcseqstr, x7
+  c8:	d5310787 	mrs	x7, trcseqstr
+  cc:	d5110887 	msr	trcextinselr, x7
+  d0:	d5310887 	mrs	x7, trcextinselr
+  d4:	d51100a7 	msr	trccntrldvr0, x7
+  d8:	d53100a7 	mrs	x7, trccntrldvr0
+  dc:	d51101a7 	msr	trccntrldvr1, x7
+  e0:	d53101a7 	mrs	x7, trccntrldvr1
+  e4:	d51102a7 	msr	trccntrldvr2, x7
+  e8:	d53102a7 	mrs	x7, trccntrldvr2
+  ec:	d51103a7 	msr	trccntrldvr3, x7
+  f0:	d53103a7 	mrs	x7, trccntrldvr3
+  f4:	d51104a7 	msr	trccntctlr0, x7
+  f8:	d53104a7 	mrs	x7, trccntctlr0
+  fc:	d51105a7 	msr	trccntctlr1, x7
+ 100:	d53105a7 	mrs	x7, trccntctlr1
+ 104:	d51106a7 	msr	trccntctlr2, x7
+ 108:	d53106a7 	mrs	x7, trccntctlr2
+ 10c:	d51107a7 	msr	trccntctlr3, x7
+ 110:	d53107a7 	mrs	x7, trccntctlr3
+ 114:	d51108a7 	msr	trccntvr0, x7
+ 118:	d53108a7 	mrs	x7, trccntvr0
+ 11c:	d51109a7 	msr	trccntvr1, x7
+ 120:	d53109a7 	mrs	x7, trccntvr1
+ 124:	d5110aa7 	msr	trccntvr2, x7
+ 128:	d5310aa7 	mrs	x7, trccntvr2
+ 12c:	d5110ba7 	msr	trccntvr3, x7
+ 130:	d5310ba7 	mrs	x7, trccntvr3
+ 134:	d53100c7 	mrs	x7, trcidr8
+ 138:	d53101c7 	mrs	x7, trcidr9
+ 13c:	d53102c7 	mrs	x7, trcidr10
+ 140:	d53103c7 	mrs	x7, trcidr11
+ 144:	d53104c7 	mrs	x7, trcidr12
+ 148:	d53105c7 	mrs	x7, trcidr13
+ 14c:	d51100e7 	msr	trcimspec0, x7
+ 150:	d53100e7 	mrs	x7, trcimspec0
+ 154:	d51101e7 	msr	trcimspec1, x7
+ 158:	d53101e7 	mrs	x7, trcimspec1
+ 15c:	d51102e7 	msr	trcimspec2, x7
+ 160:	d53102e7 	mrs	x7, trcimspec2
+ 164:	d51103e7 	msr	trcimspec3, x7
+ 168:	d53103e7 	mrs	x7, trcimspec3
+ 16c:	d51104e7 	msr	trcimspec4, x7
+ 170:	d53104e7 	mrs	x7, trcimspec4
+ 174:	d51105e7 	msr	trcimspec5, x7
+ 178:	d53105e7 	mrs	x7, trcimspec5
+ 17c:	d51106e7 	msr	trcimspec6, x7
+ 180:	d53106e7 	mrs	x7, trcimspec6
+ 184:	d51107e7 	msr	trcimspec7, x7
+ 188:	d53107e7 	mrs	x7, trcimspec7
+ 18c:	d53108e7 	mrs	x7, trcidr0
+ 190:	d53109e7 	mrs	x7, trcidr1
+ 194:	d5310ae7 	mrs	x7, trcidr2
+ 198:	d5310be7 	mrs	x7, trcidr3
+ 19c:	d5310ce7 	mrs	x7, trcidr4
+ 1a0:	d5310de7 	mrs	x7, trcidr5
+ 1a4:	d5310ee7 	mrs	x7, trcidr6
+ 1a8:	d5310fe7 	mrs	x7, trcidr7
+ 1ac:	d5111207 	msr	trcrsctlr2, x7
+ 1b0:	d5311207 	mrs	x7, trcrsctlr2
+ 1b4:	d5111307 	msr	trcrsctlr3, x7
+ 1b8:	d5311307 	mrs	x7, trcrsctlr3
+ 1bc:	d5111407 	msr	trcrsctlr4, x7
+ 1c0:	d5311407 	mrs	x7, trcrsctlr4
+ 1c4:	d5111507 	msr	trcrsctlr5, x7
+ 1c8:	d5311507 	mrs	x7, trcrsctlr5
+ 1cc:	d5111607 	msr	trcrsctlr6, x7
+ 1d0:	d5311607 	mrs	x7, trcrsctlr6
+ 1d4:	d5111707 	msr	trcrsctlr7, x7
+ 1d8:	d5311707 	mrs	x7, trcrsctlr7
+ 1dc:	d5111807 	msr	trcrsctlr8, x7
+ 1e0:	d5311807 	mrs	x7, trcrsctlr8
+ 1e4:	d5111907 	msr	trcrsctlr9, x7
+ 1e8:	d5311907 	mrs	x7, trcrsctlr9
+ 1ec:	d5111a07 	msr	trcrsctlr10, x7
+ 1f0:	d5311a07 	mrs	x7, trcrsctlr10
+ 1f4:	d5111b07 	msr	trcrsctlr11, x7
+ 1f8:	d5311b07 	mrs	x7, trcrsctlr11
+ 1fc:	d5111c07 	msr	trcrsctlr12, x7
+ 200:	d5311c07 	mrs	x7, trcrsctlr12
+ 204:	d5111d07 	msr	trcrsctlr13, x7
+ 208:	d5311d07 	mrs	x7, trcrsctlr13
+ 20c:	d5111e07 	msr	trcrsctlr14, x7
+ 210:	d5311e07 	mrs	x7, trcrsctlr14
+ 214:	d5111f07 	msr	trcrsctlr15, x7
+ 218:	d5311f07 	mrs	x7, trcrsctlr15
+ 21c:	d5111027 	msr	trcrsctlr16, x7
+ 220:	d5311027 	mrs	x7, trcrsctlr16
+ 224:	d5111127 	msr	trcrsctlr17, x7
+ 228:	d5311127 	mrs	x7, trcrsctlr17
+ 22c:	d5111227 	msr	trcrsctlr18, x7
+ 230:	d5311227 	mrs	x7, trcrsctlr18
+ 234:	d5111327 	msr	trcrsctlr19, x7
+ 238:	d5311327 	mrs	x7, trcrsctlr19
+ 23c:	d5111427 	msr	trcrsctlr20, x7
+ 240:	d5311427 	mrs	x7, trcrsctlr20
+ 244:	d5111527 	msr	trcrsctlr21, x7
+ 248:	d5311527 	mrs	x7, trcrsctlr21
+ 24c:	d5111627 	msr	trcrsctlr22, x7
+ 250:	d5311627 	mrs	x7, trcrsctlr22
+ 254:	d5111727 	msr	trcrsctlr23, x7
+ 258:	d5311727 	mrs	x7, trcrsctlr23
+ 25c:	d5111827 	msr	trcrsctlr24, x7
+ 260:	d5311827 	mrs	x7, trcrsctlr24
+ 264:	d5111927 	msr	trcrsctlr25, x7
+ 268:	d5311927 	mrs	x7, trcrsctlr25
+ 26c:	d5111a27 	msr	trcrsctlr26, x7
+ 270:	d5311a27 	mrs	x7, trcrsctlr26
+ 274:	d5111b27 	msr	trcrsctlr27, x7
+ 278:	d5311b27 	mrs	x7, trcrsctlr27
+ 27c:	d5111c27 	msr	trcrsctlr28, x7
+ 280:	d5311c27 	mrs	x7, trcrsctlr28
+ 284:	d5111d27 	msr	trcrsctlr29, x7
+ 288:	d5311d27 	mrs	x7, trcrsctlr29
+ 28c:	d5111e27 	msr	trcrsctlr30, x7
+ 290:	d5311e27 	mrs	x7, trcrsctlr30
+ 294:	d5111f27 	msr	trcrsctlr31, x7
+ 298:	d5311f27 	mrs	x7, trcrsctlr31
+ 29c:	d5111047 	msr	trcssccr0, x7
+ 2a0:	d5311047 	mrs	x7, trcssccr0
+ 2a4:	d5111147 	msr	trcssccr1, x7
+ 2a8:	d5311147 	mrs	x7, trcssccr1
+ 2ac:	d5111247 	msr	trcssccr2, x7
+ 2b0:	d5311247 	mrs	x7, trcssccr2
+ 2b4:	d5111347 	msr	trcssccr3, x7
+ 2b8:	d5311347 	mrs	x7, trcssccr3
+ 2bc:	d5111447 	msr	trcssccr4, x7
+ 2c0:	d5311447 	mrs	x7, trcssccr4
+ 2c4:	d5111547 	msr	trcssccr5, x7
+ 2c8:	d5311547 	mrs	x7, trcssccr5
+ 2cc:	d5111647 	msr	trcssccr6, x7
+ 2d0:	d5311647 	mrs	x7, trcssccr6
+ 2d4:	d5111747 	msr	trcssccr7, x7
+ 2d8:	d5311747 	mrs	x7, trcssccr7
+ 2dc:	d5111847 	msr	trcsscsr0, x7
+ 2e0:	d5311847 	mrs	x7, trcsscsr0
+ 2e4:	d5111947 	msr	trcsscsr1, x7
+ 2e8:	d5311947 	mrs	x7, trcsscsr1
+ 2ec:	d5111a47 	msr	trcsscsr2, x7
+ 2f0:	d5311a47 	mrs	x7, trcsscsr2
+ 2f4:	d5111b47 	msr	trcsscsr3, x7
+ 2f8:	d5311b47 	mrs	x7, trcsscsr3
+ 2fc:	d5111c47 	msr	trcsscsr4, x7
+ 300:	d5311c47 	mrs	x7, trcsscsr4
+ 304:	d5111d47 	msr	trcsscsr5, x7
+ 308:	d5311d47 	mrs	x7, trcsscsr5
+ 30c:	d5111e47 	msr	trcsscsr6, x7
+ 310:	d5311e47 	mrs	x7, trcsscsr6
+ 314:	d5111f47 	msr	trcsscsr7, x7
+ 318:	d5311f47 	mrs	x7, trcsscsr7
+ 31c:	d5111067 	msr	trcsspcicr0, x7
+ 320:	d5311067 	mrs	x7, trcsspcicr0
+ 324:	d5111167 	msr	trcsspcicr1, x7
+ 328:	d5311167 	mrs	x7, trcsspcicr1
+ 32c:	d5111267 	msr	trcsspcicr2, x7
+ 330:	d5311267 	mrs	x7, trcsspcicr2
+ 334:	d5111367 	msr	trcsspcicr3, x7
+ 338:	d5311367 	mrs	x7, trcsspcicr3
+ 33c:	d5111467 	msr	trcsspcicr4, x7
+ 340:	d5311467 	mrs	x7, trcsspcicr4
+ 344:	d5111567 	msr	trcsspcicr5, x7
+ 348:	d5311567 	mrs	x7, trcsspcicr5
+ 34c:	d5111667 	msr	trcsspcicr6, x7
+ 350:	d5311667 	mrs	x7, trcsspcicr6
+ 354:	d5111767 	msr	trcsspcicr7, x7
+ 358:	d5311767 	mrs	x7, trcsspcicr7
+ 35c:	d5111087 	msr	trcoslar, x7
+ 360:	d5311187 	mrs	x7, trcoslsr
+ 364:	d5111487 	msr	trcpdcr, x7
+ 368:	d5311487 	mrs	x7, trcpdcr
+ 36c:	d5311587 	mrs	x7, trcpdsr
+ 370:	d5112007 	msr	trcacvr0, x7
+ 374:	d5312007 	mrs	x7, trcacvr0
+ 378:	d5112207 	msr	trcacvr1, x7
+ 37c:	d5312207 	mrs	x7, trcacvr1
+ 380:	d5112407 	msr	trcacvr2, x7
+ 384:	d5312407 	mrs	x7, trcacvr2
+ 388:	d5112607 	msr	trcacvr3, x7
+ 38c:	d5312607 	mrs	x7, trcacvr3
+ 390:	d5112807 	msr	trcacvr4, x7
+ 394:	d5312807 	mrs	x7, trcacvr4
+ 398:	d5112a07 	msr	trcacvr5, x7
+ 39c:	d5312a07 	mrs	x7, trcacvr5
+ 3a0:	d5112c07 	msr	trcacvr6, x7
+ 3a4:	d5312c07 	mrs	x7, trcacvr6
+ 3a8:	d5112e07 	msr	trcacvr7, x7
+ 3ac:	d5312e07 	mrs	x7, trcacvr7
+ 3b0:	d5112027 	msr	trcacvr8, x7
+ 3b4:	d5312027 	mrs	x7, trcacvr8
+ 3b8:	d5112227 	msr	trcacvr9, x7
+ 3bc:	d5312227 	mrs	x7, trcacvr9
+ 3c0:	d5112427 	msr	trcacvr10, x7
+ 3c4:	d5312427 	mrs	x7, trcacvr10
+ 3c8:	d5112627 	msr	trcacvr11, x7
+ 3cc:	d5312627 	mrs	x7, trcacvr11
+ 3d0:	d5112827 	msr	trcacvr12, x7
+ 3d4:	d5312827 	mrs	x7, trcacvr12
+ 3d8:	d5112a27 	msr	trcacvr13, x7
+ 3dc:	d5312a27 	mrs	x7, trcacvr13
+ 3e0:	d5112c27 	msr	trcacvr14, x7
+ 3e4:	d5312c27 	mrs	x7, trcacvr14
+ 3e8:	d5112e27 	msr	trcacvr15, x7
+ 3ec:	d5312e27 	mrs	x7, trcacvr15
+ 3f0:	d5112047 	msr	trcacatr0, x7
+ 3f4:	d5312047 	mrs	x7, trcacatr0
+ 3f8:	d5112247 	msr	trcacatr1, x7
+ 3fc:	d5312247 	mrs	x7, trcacatr1
+ 400:	d5112447 	msr	trcacatr2, x7
+ 404:	d5312447 	mrs	x7, trcacatr2
+ 408:	d5112647 	msr	trcacatr3, x7
+ 40c:	d5312647 	mrs	x7, trcacatr3
+ 410:	d5112847 	msr	trcacatr4, x7
+ 414:	d5312847 	mrs	x7, trcacatr4
+ 418:	d5112a47 	msr	trcacatr5, x7
+ 41c:	d5312a47 	mrs	x7, trcacatr5
+ 420:	d5112c47 	msr	trcacatr6, x7
+ 424:	d5312c47 	mrs	x7, trcacatr6
+ 428:	d5112e47 	msr	trcacatr7, x7
+ 42c:	d5312e47 	mrs	x7, trcacatr7
+ 430:	d5112067 	msr	trcacatr8, x7
+ 434:	d5312067 	mrs	x7, trcacatr8
+ 438:	d5112267 	msr	trcacatr9, x7
+ 43c:	d5312267 	mrs	x7, trcacatr9
+ 440:	d5112467 	msr	trcacatr10, x7
+ 444:	d5312467 	mrs	x7, trcacatr10
+ 448:	d5112667 	msr	trcacatr11, x7
+ 44c:	d5312667 	mrs	x7, trcacatr11
+ 450:	d5112867 	msr	trcacatr12, x7
+ 454:	d5312867 	mrs	x7, trcacatr12
+ 458:	d5112a67 	msr	trcacatr13, x7
+ 45c:	d5312a67 	mrs	x7, trcacatr13
+ 460:	d5112c67 	msr	trcacatr14, x7
+ 464:	d5312c67 	mrs	x7, trcacatr14
+ 468:	d5112e67 	msr	trcacatr15, x7
+ 46c:	d5312e67 	mrs	x7, trcacatr15
+ 470:	d5112087 	msr	trcdvcvr0, x7
+ 474:	d5312087 	mrs	x7, trcdvcvr0
+ 478:	d5112487 	msr	trcdvcvr1, x7
+ 47c:	d5312487 	mrs	x7, trcdvcvr1
+ 480:	d5112887 	msr	trcdvcvr2, x7
+ 484:	d5312887 	mrs	x7, trcdvcvr2
+ 488:	d5112c87 	msr	trcdvcvr3, x7
+ 48c:	d5312c87 	mrs	x7, trcdvcvr3
+ 490:	d51120a7 	msr	trcdvcvr4, x7
+ 494:	d53120a7 	mrs	x7, trcdvcvr4
+ 498:	d51124a7 	msr	trcdvcvr5, x7
+ 49c:	d53124a7 	mrs	x7, trcdvcvr5
+ 4a0:	d51128a7 	msr	trcdvcvr6, x7
+ 4a4:	d53128a7 	mrs	x7, trcdvcvr6
+ 4a8:	d5112ca7 	msr	trcdvcvr7, x7
+ 4ac:	d5312ca7 	mrs	x7, trcdvcvr7
+ 4b0:	d51120c7 	msr	trcdvcmr0, x7
+ 4b4:	d53120c7 	mrs	x7, trcdvcmr0
+ 4b8:	d51124c7 	msr	trcdvcmr1, x7
+ 4bc:	d53124c7 	mrs	x7, trcdvcmr1
+ 4c0:	d51128c7 	msr	trcdvcmr2, x7
+ 4c4:	d53128c7 	mrs	x7, trcdvcmr2
+ 4c8:	d5112cc7 	msr	trcdvcmr3, x7
+ 4cc:	d5312cc7 	mrs	x7, trcdvcmr3
+ 4d0:	d51120e7 	msr	trcdvcmr4, x7
+ 4d4:	d53120e7 	mrs	x7, trcdvcmr4
+ 4d8:	d51124e7 	msr	trcdvcmr5, x7
+ 4dc:	d53124e7 	mrs	x7, trcdvcmr5
+ 4e0:	d51128e7 	msr	trcdvcmr6, x7
+ 4e4:	d53128e7 	mrs	x7, trcdvcmr6
+ 4e8:	d5112ce7 	msr	trcdvcmr7, x7
+ 4ec:	d5312ce7 	mrs	x7, trcdvcmr7
+ 4f0:	d5113007 	msr	trccidcvr0, x7
+ 4f4:	d5313007 	mrs	x7, trccidcvr0
+ 4f8:	d5113207 	msr	trccidcvr1, x7
+ 4fc:	d5313207 	mrs	x7, trccidcvr1
+ 500:	d5113407 	msr	trccidcvr2, x7
+ 504:	d5313407 	mrs	x7, trccidcvr2
+ 508:	d5113607 	msr	trccidcvr3, x7
+ 50c:	d5313607 	mrs	x7, trccidcvr3
+ 510:	d5113807 	msr	trccidcvr4, x7
+ 514:	d5313807 	mrs	x7, trccidcvr4
+ 518:	d5113a07 	msr	trccidcvr5, x7
+ 51c:	d5313a07 	mrs	x7, trccidcvr5
+ 520:	d5113c07 	msr	trccidcvr6, x7
+ 524:	d5313c07 	mrs	x7, trccidcvr6
+ 528:	d5113e07 	msr	trccidcvr7, x7
+ 52c:	d5313e07 	mrs	x7, trccidcvr7
+ 530:	d5113027 	msr	trcvmidcvr0, x7
+ 534:	d5313027 	mrs	x7, trcvmidcvr0
+ 538:	d5113227 	msr	trcvmidcvr1, x7
+ 53c:	d5313227 	mrs	x7, trcvmidcvr1
+ 540:	d5113427 	msr	trcvmidcvr2, x7
+ 544:	d5313427 	mrs	x7, trcvmidcvr2
+ 548:	d5113627 	msr	trcvmidcvr3, x7
+ 54c:	d5313627 	mrs	x7, trcvmidcvr3
+ 550:	d5113827 	msr	trcvmidcvr4, x7
+ 554:	d5313827 	mrs	x7, trcvmidcvr4
+ 558:	d5113a27 	msr	trcvmidcvr5, x7
+ 55c:	d5313a27 	mrs	x7, trcvmidcvr5
+ 560:	d5113c27 	msr	trcvmidcvr6, x7
+ 564:	d5313c27 	mrs	x7, trcvmidcvr6
+ 568:	d5113e27 	msr	trcvmidcvr7, x7
+ 56c:	d5313e27 	mrs	x7, trcvmidcvr7
+ 570:	d5113047 	msr	trccidcctlr0, x7
+ 574:	d5313047 	mrs	x7, trccidcctlr0
+ 578:	d5113147 	msr	trccidcctlr1, x7
+ 57c:	d5313147 	mrs	x7, trccidcctlr1
+ 580:	d5113247 	msr	trcvmidcctlr0, x7
+ 584:	d5313247 	mrs	x7, trcvmidcctlr0
+ 588:	d5113347 	msr	trcvmidcctlr1, x7
+ 58c:	d5313347 	mrs	x7, trcvmidcctlr1
+ 590:	d5117087 	msr	trcitctrl, x7
+ 594:	d5317087 	mrs	x7, trcitctrl
+ 598:	d51178c7 	msr	trcclaimset, x7
+ 59c:	d53178c7 	mrs	x7, trcclaimset
+ 5a0:	d51179c7 	msr	trcclaimclr, x7
+ 5a4:	d53179c7 	mrs	x7, trcclaimclr
+ 5a8:	d5317ac7 	mrs	x7, trcdevaff0
+ 5ac:	d5317bc7 	mrs	x7, trcdevaff1
+ 5b0:	d5117cc7 	msr	trclar, x7
+ 5b4:	d5317dc7 	mrs	x7, trclsr
+ 5b8:	d5317ec7 	mrs	x7, trcauthstatus
+ 5bc:	d5317fc7 	mrs	x7, trcdevarch
+ 5c0:	d53172e7 	mrs	x7, trcdevid
+ 5c4:	d53173e7 	mrs	x7, trcdevtype
+ 5c8:	d53174e7 	mrs	x7, trcpidr4
+ 5cc:	d53175e7 	mrs	x7, trcpidr5
+ 5d0:	d53176e7 	mrs	x7, trcpidr6
+ 5d4:	d53177e7 	mrs	x7, trcpidr7
+ 5d8:	d53178e7 	mrs	x7, trcpidr0
+ 5dc:	d53179e7 	mrs	x7, trcpidr1
+ 5e0:	d5317ae7 	mrs	x7, trcpidr2
+ 5e4:	d5317be7 	mrs	x7, trcpidr3
+ 5e8:	d5317ce7 	mrs	x7, trccidr0
+ 5ec:	d5317de7 	mrs	x7, trccidr1
+ 5f0:	d5317ee7 	mrs	x7, trccidr2
+ 5f4:	d5317fe7 	mrs	x7, trccidr3
diff --git a/gas/testsuite/gas/aarch64/tracereg.s b/gas/testsuite/gas/aarch64/tracereg.s
new file mode 100644
index 0000000..7d559d1
--- /dev/null
+++ b/gas/testsuite/gas/aarch64/tracereg.s
@@ -0,0 +1,242 @@
+/* tracereg.s Test file for AArch64 trace unit registers.
+
+   Copyright 2013 Free Software Foundation, Inc.
+   Contributed by ARM Ltd.
+
+   This file is part of GAS.
+
+   GAS is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the license, or
+   (at your option) any later version.
+
+   GAS is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; see the file COPYING3. If not,
+   see <http://www.gnu.org/licenses/>.  */
+
+	.macro rw_sys_reg sys_reg xreg r w
+	.ifc \w, 1
+	msr \sys_reg, \xreg
+	.endif
+	.ifc \r, 1
+	mrs \xreg, \sys_reg
+	.endif
+	.endm
+
+	.text
+
+	rw_sys_reg sys_reg=trcprgctlr xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcprocselr xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcstatr xreg=x7 r=1 w=0
+	rw_sys_reg sys_reg=trcconfigr xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcauxctlr xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trceventctl0r xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trceventctl1r xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcstallctlr xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trctsctlr xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcsyncpr xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcccctlr xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcbbctlr xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trctraceidr xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcqctlr xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcvictlr xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcviiectlr xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcvissctlr xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcvipcssctlr xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcvdctlr xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcvdsacctlr xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcvdarcctlr xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcseqevr0 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcseqevr1 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcseqevr2 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcseqrstevr xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcseqstr xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcextinselr xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trccntrldvr0 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trccntrldvr1 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trccntrldvr2 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trccntrldvr3 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trccntctlr0 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trccntctlr1 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trccntctlr2 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trccntctlr3 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trccntvr0 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trccntvr1 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trccntvr2 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trccntvr3 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcidr8 xreg=x7 r=1 w=0
+	rw_sys_reg sys_reg=trcidr9 xreg=x7 r=1 w=0
+	rw_sys_reg sys_reg=trcidr10 xreg=x7 r=1 w=0
+	rw_sys_reg sys_reg=trcidr11 xreg=x7 r=1 w=0
+	rw_sys_reg sys_reg=trcidr12 xreg=x7 r=1 w=0
+	rw_sys_reg sys_reg=trcidr13 xreg=x7 r=1 w=0
+	rw_sys_reg sys_reg=trcimspec0 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcimspec1 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcimspec2 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcimspec3 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcimspec4 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcimspec5 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcimspec6 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcimspec7 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcidr0 xreg=x7 r=1 w=0
+	rw_sys_reg sys_reg=trcidr1 xreg=x7 r=1 w=0
+	rw_sys_reg sys_reg=trcidr2 xreg=x7 r=1 w=0
+	rw_sys_reg sys_reg=trcidr3 xreg=x7 r=1 w=0
+	rw_sys_reg sys_reg=trcidr4 xreg=x7 r=1 w=0
+	rw_sys_reg sys_reg=trcidr5 xreg=x7 r=1 w=0
+	rw_sys_reg sys_reg=trcidr6 xreg=x7 r=1 w=0
+	rw_sys_reg sys_reg=trcidr7 xreg=x7 r=1 w=0
+	rw_sys_reg sys_reg=trcrsctlr2 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcrsctlr3 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcrsctlr4 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcrsctlr5 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcrsctlr6 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcrsctlr7 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcrsctlr8 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcrsctlr9 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcrsctlr10 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcrsctlr11 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcrsctlr12 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcrsctlr13 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcrsctlr14 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcrsctlr15 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcrsctlr16 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcrsctlr17 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcrsctlr18 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcrsctlr19 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcrsctlr20 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcrsctlr21 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcrsctlr22 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcrsctlr23 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcrsctlr24 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcrsctlr25 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcrsctlr26 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcrsctlr27 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcrsctlr28 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcrsctlr29 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcrsctlr30 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcrsctlr31 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcssccr0 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcssccr1 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcssccr2 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcssccr3 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcssccr4 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcssccr5 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcssccr6 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcssccr7 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcsscsr0 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcsscsr1 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcsscsr2 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcsscsr3 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcsscsr4 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcsscsr5 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcsscsr6 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcsscsr7 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcsspcicr0 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcsspcicr1 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcsspcicr2 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcsspcicr3 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcsspcicr4 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcsspcicr5 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcsspcicr6 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcsspcicr7 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcoslar xreg=x7 r=0 w=1
+	rw_sys_reg sys_reg=trcoslsr xreg=x7 r=1 w=0
+	rw_sys_reg sys_reg=trcpdcr xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcpdsr xreg=x7 r=1 w=0
+	rw_sys_reg sys_reg=trcacvr0 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcacvr1 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcacvr2 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcacvr3 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcacvr4 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcacvr5 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcacvr6 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcacvr7 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcacvr8 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcacvr9 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcacvr10 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcacvr11 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcacvr12 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcacvr13 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcacvr14 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcacvr15 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcacatr0 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcacatr1 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcacatr2 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcacatr3 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcacatr4 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcacatr5 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcacatr6 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcacatr7 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcacatr8 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcacatr9 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcacatr10 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcacatr11 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcacatr12 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcacatr13 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcacatr14 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcacatr15 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcdvcvr0 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcdvcvr1 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcdvcvr2 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcdvcvr3 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcdvcvr4 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcdvcvr5 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcdvcvr6 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcdvcvr7 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcdvcmr0 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcdvcmr1 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcdvcmr2 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcdvcmr3 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcdvcmr4 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcdvcmr5 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcdvcmr6 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcdvcmr7 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trccidcvr0 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trccidcvr1 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trccidcvr2 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trccidcvr3 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trccidcvr4 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trccidcvr5 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trccidcvr6 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trccidcvr7 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcvmidcvr0 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcvmidcvr1 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcvmidcvr2 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcvmidcvr3 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcvmidcvr4 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcvmidcvr5 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcvmidcvr6 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcvmidcvr7 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trccidcctlr0 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trccidcctlr1 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcvmidcctlr0 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcvmidcctlr1 xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcitctrl xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcclaimset xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcclaimclr xreg=x7 r=1 w=1
+	rw_sys_reg sys_reg=trcdevaff0 xreg=x7 r=1 w=0
+	rw_sys_reg sys_reg=trcdevaff1 xreg=x7 r=1 w=0
+	rw_sys_reg sys_reg=trclar xreg=x7 r=0 w=1
+	rw_sys_reg sys_reg=trclsr xreg=x7 r=1 w=0
+	rw_sys_reg sys_reg=trcauthstatus xreg=x7 r=1 w=0
+	rw_sys_reg sys_reg=trcdevarch xreg=x7 r=1 w=0
+	rw_sys_reg sys_reg=trcdevid xreg=x7 r=1 w=0
+	rw_sys_reg sys_reg=trcdevtype xreg=x7 r=1 w=0
+	rw_sys_reg sys_reg=trcpidr4 xreg=x7 r=1 w=0
+	rw_sys_reg sys_reg=trcpidr5 xreg=x7 r=1 w=0
+	rw_sys_reg sys_reg=trcpidr6 xreg=x7 r=1 w=0
+	rw_sys_reg sys_reg=trcpidr7 xreg=x7 r=1 w=0
+	rw_sys_reg sys_reg=trcpidr0 xreg=x7 r=1 w=0
+	rw_sys_reg sys_reg=trcpidr1 xreg=x7 r=1 w=0
+	rw_sys_reg sys_reg=trcpidr2 xreg=x7 r=1 w=0
+	rw_sys_reg sys_reg=trcpidr3 xreg=x7 r=1 w=0
+	rw_sys_reg sys_reg=trccidr0 xreg=x7 r=1 w=0
+	rw_sys_reg sys_reg=trccidr1 xreg=x7 r=1 w=0
+	rw_sys_reg sys_reg=trccidr2 xreg=x7 r=1 w=0
+	rw_sys_reg sys_reg=trccidr3 xreg=x7 r=1 w=0
diff --git a/include/opcode/aarch64.h b/include/opcode/aarch64.h
index 4a3a312..9b42cbd 100644
--- a/include/opcode/aarch64.h
+++ b/include/opcode/aarch64.h
@@ -624,6 +624,8 @@ typedef struct
 
 extern const aarch64_sys_reg aarch64_sys_regs [];
 extern bfd_boolean aarch64_sys_reg_deprecated_p (const aarch64_sys_reg *);
+extern bfd_boolean aarch64_sys_reg_readonly_p (const aarch64_sys_reg *);
+extern bfd_boolean aarch64_sys_reg_writeonly_p (const aarch64_sys_reg *);
 
 typedef struct
 {
diff --git a/opcodes/aarch64-opc.c b/opcodes/aarch64-opc.c
index af1472a..131e4d2 100644
--- a/opcodes/aarch64-opc.c
+++ b/opcodes/aarch64-opc.c
@@ -2676,6 +2676,8 @@ aarch64_print_operand (char *buf, size_t size, bfd_vma pc,
 #define CPEN_(op1,crm,op2) CPENC(3,(op1),4,(crm),(op2))
   /* for 3.9.10 System Instructions */
 #define CPENS(op1,crn,crm,op2) CPENC(1,(op1),(crn),(crm),(op2))
+/* Trace unit registers.  */
+#define CPENT(crn,crm,op2) CPENC(2,1,(crn),(crm),(op2))
 
 #define C0  0
 #define C1  1
@@ -2697,7 +2699,18 @@ aarch64_print_operand (char *buf, size_t size, bfd_vma pc,
 #ifdef F_DEPRECATED
 #undef F_DEPRECATED
 #endif
+
+#ifdef F_READONLY
+#undef F_READONLY
+#endif
+
+#ifdef F_WRITEONLY
+#undef F_WRITEONLY
+#endif
+
 #define F_DEPRECATED	0x1	/* Deprecated system register.  */
+#define F_READONLY	0x2	/* Not for MSR.  */
+#define F_WRITEONLY	0x4	/* Not for MRS.  */
 
 /* TODO there are two more issues need to be resolved
    1. handle read-only and write-only system registers
@@ -3010,6 +3023,217 @@ const aarch64_sys_reg aarch64_sys_regs [] =
   { "pmevtyper29_el0",   CPENC(3,3,C14,C15,5),	0 },
   { "pmevtyper30_el0",   CPENC(3,3,C14,C15,6),	0 },
   { "pmccfiltr_el0",     CPENC(3,3,C14,C15,7),	0 },
+  /* Trace unit registers.  */
+  { "trcprgctlr",        CPENT(C0,C1,0),	0 },
+  { "trcprocselr",       CPENT(C0,C2,0),	0 },
+  { "trcstatr",          CPENT(C0,C3,0),	F_READONLY },
+  { "trcconfigr",        CPENT(C0,C4,0),	0 },
+  { "trcauxctlr",        CPENT(C0,C6,0),	0 },
+  { "trceventctl0r",     CPENT(C0,C8,0),	0 },
+  { "trceventctl1r",     CPENT(C0,C9,0),	0 },
+  { "trcstallctlr",      CPENT(C0,C11,0),	0 },
+  { "trctsctlr",         CPENT(C0,C12,0),	0 },
+  { "trcsyncpr",         CPENT(C0,C13,0),	0 },
+  { "trcccctlr",         CPENT(C0,C14,0),	0 },
+  { "trcbbctlr",         CPENT(C0,C15,0),	0 },
+  { "trctraceidr",       CPENT(C0,C0,1),	0 },
+  { "trcqctlr",          CPENT(C0,C1,1),	0 },
+  { "trcvictlr",         CPENT(C0,C0,2),	0 },
+  { "trcviiectlr",       CPENT(C0,C1,2),	0 },
+  { "trcvissctlr",       CPENT(C0,C2,2),	0 },
+  { "trcvipcssctlr",     CPENT(C0,C3,2),	0 },
+  { "trcvdctlr",         CPENT(C0,C8,2),	0 },
+  { "trcvdsacctlr",      CPENT(C0,C9,2),	0 },
+  { "trcvdarcctlr",      CPENT(C0,C10,2),	0 },
+  { "trcseqevr0",        CPENT(C0,C0,4),	0 },
+  { "trcseqevr1",        CPENT(C0,C1,4),	0 },
+  { "trcseqevr2",        CPENT(C0,C2,4),	0 },
+  { "trcseqrstevr",      CPENT(C0,C6,4),	0 },
+  { "trcseqstr",         CPENT(C0,C7,4),	0 },
+  { "trcextinselr",      CPENT(C0,C8,4),	0 },
+  { "trccntrldvr0",      CPENT(C0,C0,5),	0 },
+  { "trccntrldvr1",      CPENT(C0,C1,5),	0 },
+  { "trccntrldvr2",      CPENT(C0,C2,5),	0 },
+  { "trccntrldvr3",      CPENT(C0,C3,5),	0 },
+  { "trccntctlr0",       CPENT(C0,C4,5),	0 },
+  { "trccntctlr1",       CPENT(C0,C5,5),	0 },
+  { "trccntctlr2",       CPENT(C0,C6,5),	0 },
+  { "trccntctlr3",       CPENT(C0,C7,5),	0 },
+  { "trccntvr0",         CPENT(C0,C8,5),	0 },
+  { "trccntvr1",         CPENT(C0,C9,5),	0 },
+  { "trccntvr2",         CPENT(C0,C10,5),	0 },
+  { "trccntvr3",         CPENT(C0,C11,5),	0 },
+  { "trcidr8",           CPENT(C0,C0,6),	F_READONLY },
+  { "trcidr9",           CPENT(C0,C1,6),	F_READONLY },
+  { "trcidr10",          CPENT(C0,C2,6),	F_READONLY },
+  { "trcidr11",          CPENT(C0,C3,6),	F_READONLY },
+  { "trcidr12",          CPENT(C0,C4,6),	F_READONLY },
+  { "trcidr13",          CPENT(C0,C5,6),	F_READONLY },
+  { "trcimspec0",        CPENT(C0,C0,7),	0 },
+  { "trcimspec1",        CPENT(C0,C1,7),	0 },
+  { "trcimspec2",        CPENT(C0,C2,7),	0 },
+  { "trcimspec3",        CPENT(C0,C3,7),	0 },
+  { "trcimspec4",        CPENT(C0,C4,7),	0 },
+  { "trcimspec5",        CPENT(C0,C5,7),	0 },
+  { "trcimspec6",        CPENT(C0,C6,7),	0 },
+  { "trcimspec7",        CPENT(C0,C7,7),	0 },
+  { "trcidr0",           CPENT(C0,C8,7),	F_READONLY },
+  { "trcidr1",           CPENT(C0,C9,7),	F_READONLY },
+  { "trcidr2",           CPENT(C0,C10,7),	F_READONLY },
+  { "trcidr3",           CPENT(C0,C11,7),	F_READONLY },
+  { "trcidr4",           CPENT(C0,C12,7),	F_READONLY },
+  { "trcidr5",           CPENT(C0,C13,7),	F_READONLY },
+  { "trcidr6",           CPENT(C0,C14,7),	F_READONLY },
+  { "trcidr7",           CPENT(C0,C15,7),	F_READONLY },
+  { "trcrsctlr2",        CPENT(C1,C2,0),	0 },
+  { "trcrsctlr3",        CPENT(C1,C3,0),	0 },
+  { "trcrsctlr4",        CPENT(C1,C4,0),	0 },
+  { "trcrsctlr5",        CPENT(C1,C5,0),	0 },
+  { "trcrsctlr6",        CPENT(C1,C6,0),	0 },
+  { "trcrsctlr7",        CPENT(C1,C7,0),	0 },
+  { "trcrsctlr8",        CPENT(C1,C8,0),	0 },
+  { "trcrsctlr9",        CPENT(C1,C9,0),	0 },
+  { "trcrsctlr10",       CPENT(C1,C10,0),	0 },
+  { "trcrsctlr11",       CPENT(C1,C11,0),	0 },
+  { "trcrsctlr12",       CPENT(C1,C12,0),	0 },
+  { "trcrsctlr13",       CPENT(C1,C13,0),	0 },
+  { "trcrsctlr14",       CPENT(C1,C14,0),	0 },
+  { "trcrsctlr15",       CPENT(C1,C15,0),	0 },
+  { "trcrsctlr16",       CPENT(C1,C0,1),	0 },
+  { "trcrsctlr17",       CPENT(C1,C1,1),	0 },
+  { "trcrsctlr18",       CPENT(C1,C2,1),	0 },
+  { "trcrsctlr19",       CPENT(C1,C3,1),	0 },
+  { "trcrsctlr20",       CPENT(C1,C4,1),	0 },
+  { "trcrsctlr21",       CPENT(C1,C5,1),	0 },
+  { "trcrsctlr22",       CPENT(C1,C6,1),	0 },
+  { "trcrsctlr23",       CPENT(C1,C7,1),	0 },
+  { "trcrsctlr24",       CPENT(C1,C8,1),	0 },
+  { "trcrsctlr25",       CPENT(C1,C9,1),	0 },
+  { "trcrsctlr26",       CPENT(C1,C10,1),	0 },
+  { "trcrsctlr27",       CPENT(C1,C11,1),	0 },
+  { "trcrsctlr28",       CPENT(C1,C12,1),	0 },
+  { "trcrsctlr29",       CPENT(C1,C13,1),	0 },
+  { "trcrsctlr30",       CPENT(C1,C14,1),	0 },
+  { "trcrsctlr31",       CPENT(C1,C15,1),	0 },
+  { "trcssccr0",         CPENT(C1,C0,2),	0 },
+  { "trcssccr1",         CPENT(C1,C1,2),	0 },
+  { "trcssccr2",         CPENT(C1,C2,2),	0 },
+  { "trcssccr3",         CPENT(C1,C3,2),	0 },
+  { "trcssccr4",         CPENT(C1,C4,2),	0 },
+  { "trcssccr5",         CPENT(C1,C5,2),	0 },
+  { "trcssccr6",         CPENT(C1,C6,2),	0 },
+  { "trcssccr7",         CPENT(C1,C7,2),	0 },
+  { "trcsscsr0",         CPENT(C1,C8,2),	0 },
+  { "trcsscsr1",         CPENT(C1,C9,2),	0 },
+  { "trcsscsr2",         CPENT(C1,C10,2),	0 },
+  { "trcsscsr3",         CPENT(C1,C11,2),	0 },
+  { "trcsscsr4",         CPENT(C1,C12,2),	0 },
+  { "trcsscsr5",         CPENT(C1,C13,2),	0 },
+  { "trcsscsr6",         CPENT(C1,C14,2),	0 },
+  { "trcsscsr7",         CPENT(C1,C15,2),	0 },
+  { "trcsspcicr0",       CPENT(C1,C0,3),	0 },
+  { "trcsspcicr1",       CPENT(C1,C1,3),	0 },
+  { "trcsspcicr2",       CPENT(C1,C2,3),	0 },
+  { "trcsspcicr3",       CPENT(C1,C3,3),	0 },
+  { "trcsspcicr4",       CPENT(C1,C4,3),	0 },
+  { "trcsspcicr5",       CPENT(C1,C5,3),	0 },
+  { "trcsspcicr6",       CPENT(C1,C6,3),	0 },
+  { "trcsspcicr7",       CPENT(C1,C7,3),	0 },
+  { "trcoslar",          CPENT(C1,C0,4),	F_WRITEONLY },
+  { "trcoslsr",          CPENT(C1,C1,4),	F_READONLY },
+  { "trcpdcr",           CPENT(C1,C4,4),	0 },
+  { "trcpdsr",           CPENT(C1,C5,4),	F_READONLY },
+  { "trcacvr0",          CPENT(C2,C0,0),	0 },
+  { "trcacvr1",          CPENT(C2,C2,0),	0 },
+  { "trcacvr2",          CPENT(C2,C4,0),	0 },
+  { "trcacvr3",          CPENT(C2,C6,0),	0 },
+  { "trcacvr4",          CPENT(C2,C8,0),	0 },
+  { "trcacvr5",          CPENT(C2,C10,0),	0 },
+  { "trcacvr6",          CPENT(C2,C12,0),	0 },
+  { "trcacvr7",          CPENT(C2,C14,0),	0 },
+  { "trcacvr8",          CPENT(C2,C0,1),	0 },
+  { "trcacvr9",          CPENT(C2,C2,1),	0 },
+  { "trcacvr10",         CPENT(C2,C4,1),	0 },
+  { "trcacvr11",         CPENT(C2,C6,1),	0 },
+  { "trcacvr12",         CPENT(C2,C8,1),	0 },
+  { "trcacvr13",         CPENT(C2,C10,1),	0 },
+  { "trcacvr14",         CPENT(C2,C12,1),	0 },
+  { "trcacvr15",         CPENT(C2,C14,1),	0 },
+  { "trcacatr0",         CPENT(C2,C0,2),	0 },
+  { "trcacatr1",         CPENT(C2,C2,2),	0 },
+  { "trcacatr2",         CPENT(C2,C4,2),	0 },
+  { "trcacatr3",         CPENT(C2,C6,2),	0 },
+  { "trcacatr4",         CPENT(C2,C8,2),	0 },
+  { "trcacatr5",         CPENT(C2,C10,2),	0 },
+  { "trcacatr6",         CPENT(C2,C12,2),	0 },
+  { "trcacatr7",         CPENT(C2,C14,2),	0 },
+  { "trcacatr8",         CPENT(C2,C0,3),	0 },
+  { "trcacatr9",         CPENT(C2,C2,3),	0 },
+  { "trcacatr10",        CPENT(C2,C4,3),	0 },
+  { "trcacatr11",        CPENT(C2,C6,3),	0 },
+  { "trcacatr12",        CPENT(C2,C8,3),	0 },
+  { "trcacatr13",        CPENT(C2,C10,3),	0 },
+  { "trcacatr14",        CPENT(C2,C12,3),	0 },
+  { "trcacatr15",        CPENT(C2,C14,3),	0 },
+  { "trcdvcvr0",         CPENT(C2,C0,4),	0 },
+  { "trcdvcvr1",         CPENT(C2,C4,4),	0 },
+  { "trcdvcvr2",         CPENT(C2,C8,4),	0 },
+  { "trcdvcvr3",         CPENT(C2,C12,4),	0 },
+  { "trcdvcvr4",         CPENT(C2,C0,5),	0 },
+  { "trcdvcvr5",         CPENT(C2,C4,5),	0 },
+  { "trcdvcvr6",         CPENT(C2,C8,5),	0 },
+  { "trcdvcvr7",         CPENT(C2,C12,5),	0 },
+  { "trcdvcmr0",         CPENT(C2,C0,6),	0 },
+  { "trcdvcmr1",         CPENT(C2,C4,6),	0 },
+  { "trcdvcmr2",         CPENT(C2,C8,6),	0 },
+  { "trcdvcmr3",         CPENT(C2,C12,6),	0 },
+  { "trcdvcmr4",         CPENT(C2,C0,7),	0 },
+  { "trcdvcmr5",         CPENT(C2,C4,7),	0 },
+  { "trcdvcmr6",         CPENT(C2,C8,7),	0 },
+  { "trcdvcmr7",         CPENT(C2,C12,7),	0 },
+  { "trccidcvr0",        CPENT(C3,C0,0),	0 },
+  { "trccidcvr1",        CPENT(C3,C2,0),	0 },
+  { "trccidcvr2",        CPENT(C3,C4,0),	0 },
+  { "trccidcvr3",        CPENT(C3,C6,0),	0 },
+  { "trccidcvr4",        CPENT(C3,C8,0),	0 },
+  { "trccidcvr5",        CPENT(C3,C10,0),	0 },
+  { "trccidcvr6",        CPENT(C3,C12,0),	0 },
+  { "trccidcvr7",        CPENT(C3,C14,0),	0 },
+  { "trcvmidcvr0",       CPENT(C3,C0,1),	0 },
+  { "trcvmidcvr1",       CPENT(C3,C2,1),	0 },
+  { "trcvmidcvr2",       CPENT(C3,C4,1),	0 },
+  { "trcvmidcvr3",       CPENT(C3,C6,1),	0 },
+  { "trcvmidcvr4",       CPENT(C3,C8,1),	0 },
+  { "trcvmidcvr5",       CPENT(C3,C10,1),	0 },
+  { "trcvmidcvr6",       CPENT(C3,C12,1),	0 },
+  { "trcvmidcvr7",       CPENT(C3,C14,1),	0 },
+  { "trccidcctlr0",      CPENT(C3,C0,2),	0 },
+  { "trccidcctlr1",      CPENT(C3,C1,2),	0 },
+  { "trcvmidcctlr0",     CPENT(C3,C2,2),	0 },
+  { "trcvmidcctlr1",     CPENT(C3,C3,2),	0 },
+  { "trcitctrl",         CPENT(C7,C0,4),	0 },
+  { "trcclaimset",       CPENT(C7,C8,6),	0 },
+  { "trcclaimclr",       CPENT(C7,C9,6),	0 },
+  { "trcdevaff0",        CPENT(C7,C10,6),	F_READONLY },
+  { "trcdevaff1",        CPENT(C7,C11,6),	F_READONLY },
+  { "trclar",            CPENT(C7,C12,6),	F_WRITEONLY },
+  { "trclsr",            CPENT(C7,C13,6),	F_READONLY },
+  { "trcauthstatus",     CPENT(C7,C14,6),	F_READONLY },
+  { "trcdevarch",        CPENT(C7,C15,6),	F_READONLY },
+  { "trcdevid",          CPENT(C7,C2,7),	F_READONLY },
+  { "trcdevtype",        CPENT(C7,C3,7),	F_READONLY },
+  { "trcpidr4",          CPENT(C7,C4,7),	F_READONLY },
+  { "trcpidr5",          CPENT(C7,C5,7),	F_READONLY },
+  { "trcpidr6",          CPENT(C7,C6,7),	F_READONLY },
+  { "trcpidr7",          CPENT(C7,C7,7),	F_READONLY },
+  { "trcpidr0",          CPENT(C7,C8,7),	F_READONLY },
+  { "trcpidr1",          CPENT(C7,C9,7),	F_READONLY },
+  { "trcpidr2",          CPENT(C7,C10,7),	F_READONLY },
+  { "trcpidr3",          CPENT(C7,C11,7),	F_READONLY },
+  { "trccidr0",          CPENT(C7,C12,7),	F_READONLY },
+  { "trccidr1",          CPENT(C7,C13,7),	F_READONLY },
+  { "trccidr2",          CPENT(C7,C14,7),	F_READONLY },
+  { "trccidr3",          CPENT(C7,C15,7),	F_READONLY },
   { 0,          CPENC(0,0,0,0,0),	0 },
 };
 
@@ -3019,6 +3243,18 @@ aarch64_sys_reg_deprecated_p (const aarch64_sys_reg *reg)
   return (reg->flags & F_DEPRECATED) != 0;
 }
 
+bfd_boolean
+aarch64_sys_reg_readonly_p (const aarch64_sys_reg *reg)
+{
+  return (reg->flags & F_READONLY) != 0;
+}
+
+bfd_boolean
+aarch64_sys_reg_writeonly_p (const aarch64_sys_reg *reg)
+{
+  return (reg->flags & F_WRITEONLY) != 0;
+}
+
 const struct aarch64_name_value_pair aarch64_pstatefields [] =
 {
   { "spsel",            0x05  },