sim-se: implement the getcpu syscall

Change-Id: I63a1384646829b8cf68453c42aed6a7d12172787
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/28590
Reviewed-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
Maintainer: Giacomo Travaglini <giacomo.travaglini@arm.com>
Tested-by: kokoro <noreply+kokoro@google.com>

src/arch/arm/linux/process.cc

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2010-2013, 2015 ARM Limited
+ * Copyright (c) 2010-2013, 2015, 2020 ARM Limited
  * All rights reserved
  *
  * The license below extends only to copyright in the software and shall
@@ -476,7 +476,7 @@ class SyscallTable32 :
         { base + 342, "tee" },
         { base + 343, "vmsplice" },
         { base + 344, "move_pages" },
-        { base + 345, "getcpu" },
+        { base + 345, "getcpu", getcpuFunc },
         { base + 346, "epoll_pwait" },
         { base + 347, "sys_kexec_load" },
         { base + 348, "sys_utimensat" },
@@ -681,7 +681,7 @@ class SyscallTable64 :
         {  base + 165, "getrusage", getrusageFunc<ArmLinux64> },
         {  base + 166, "umask" },
         {  base + 167, "prctl" },
-        {  base + 168, "getcpu" },
+        {  base + 168, "getcpu", getcpuFunc },
         {  base + 169, "gettimeofday", gettimeofdayFunc<ArmLinux64> },
         {  base + 170, "settimeofday" },
         {  base + 171, "adjtimex" },

src/arch/x86/linux/process.cc

@@ -566,7 +566,7 @@ static SyscallDescTable<X86_64LinuxProcess::SyscallABI> syscallDescs64 = {
     { 306, "syncfs" },
     { 307, "sendmmsg" },
     { 308, "setns" },
-    { 309, "getcpu" },
+    { 309, "getcpu", getcpuFunc },
     { 310, "proess_vm_readv" },
     { 311, "proess_vm_writev" },
     { 312, "kcmp" },
@@ -914,7 +914,7 @@ static SyscallDescTable<I386LinuxProcess::SyscallABI> syscallDescs32 = {
     { 315, "tee" },
     { 316, "vmsplice" },
     { 317, "move_pages" },
-    { 318, "getcpu" },
+    { 318, "getcpu", getcpuFunc },
     { 319, "epoll_pwait" },
     { 320, "utimensat" },
     { 321, "signalfd" },