[Lldb-commits] [lldb] r318357 - Fix alignment of arm64 fpu register context structure

[Jason Molenda via lldb-commits]

Author: jmolenda
Date: Wed Nov 15 16:50:29 2017
New Revision: 318357

URL: http://llvm.org/viewvc/llvm-project?rev=318357&view=rev
Log:
Fix alignment of arm64 fpu register context structure
so it has the same padding as the kernel's definition
which is written in terms of uint128_t.  Original patch
by Ryan Mansfield.

<rdar://problem/35468499> 

Modified:
    lldb/trunk/source/Plugins/ObjectFile/Mach-O/ObjectFileMachO.cpp
    lldb/trunk/source/Plugins/Process/Utility/RegisterContextDarwin_arm64.cpp
    lldb/trunk/source/Plugins/Process/Utility/RegisterContextDarwin_arm64.h

Modified: lldb/trunk/source/Plugins/ObjectFile/Mach-O/ObjectFileMachO.cpp
URL: 
http://llvm.org/viewvc/llvm-project/lldb/trunk/source/Plugins/ObjectFile/Mach-O/ObjectFileMachO.cpp?rev=318357&r1=318356&r2=318357&view=diff
==============================================================================
--- lldb/trunk/source/Plugins/ObjectFile/Mach-O/ObjectFileMachO.cpp (original)
+++ lldb/trunk/source/Plugins/ObjectFile/Mach-O/ObjectFileMachO.cpp Wed Nov 15 
16:50:29 2017
@@ -686,7 +686,7 @@ public:
       case FPURegSet: {
         uint8_t *fpu_reg_buf = (uint8_t *)&fpu.v[0];
         const int fpu_reg_buf_size = sizeof(fpu);
-        if (fpu_reg_buf_size == count &&
+        if (fpu_reg_buf_size == count * sizeof(uint32_t) &&
             data.ExtractBytes(offset, fpu_reg_buf_size, eByteOrderLittle,
                               fpu_reg_buf) == fpu_reg_buf_size) {
           SetError(FPURegSet, Read, 0);

Modified: 
lldb/trunk/source/Plugins/Process/Utility/RegisterContextDarwin_arm64.cpp
URL: 
http://llvm.org/viewvc/llvm-project/lldb/trunk/source/Plugins/Process/Utility/RegisterContextDarwin_arm64.cpp?rev=318357&r1=318356&r2=318357&view=diff
==============================================================================
--- lldb/trunk/source/Plugins/Process/Utility/RegisterContextDarwin_arm64.cpp 
(original)
+++ lldb/trunk/source/Plugins/Process/Utility/RegisterContextDarwin_arm64.cpp 
Wed Nov 15 16:50:29 2017
@@ -426,7 +426,7 @@ bool RegisterContextDarwin_arm64::ReadRe
   case fpu_v29:
   case fpu_v30:
   case fpu_v31:
-    value.SetBytes(fpu.v[reg].bytes, reg_info->byte_size,
+    value.SetBytes(fpu.v[reg].bytes.buffer, reg_info->byte_size,
                    endian::InlHostByteOrder());
     break;
 
@@ -618,7 +618,7 @@ bool RegisterContextDarwin_arm64::WriteR
   case fpu_v29:
   case fpu_v30:
   case fpu_v31:
-    ::memcpy(fpu.v[reg].bytes, value.GetBytes(), value.GetByteSize());
+    ::memcpy(fpu.v[reg].bytes.buffer, value.GetBytes(), value.GetByteSize());
     break;
 
   case fpu_fpsr:

Modified: 
lldb/trunk/source/Plugins/Process/Utility/RegisterContextDarwin_arm64.h
URL: 
http://llvm.org/viewvc/llvm-project/lldb/trunk/source/Plugins/Process/Utility/RegisterContextDarwin_arm64.h?rev=318357&r1=318356&r2=318357&view=diff
==============================================================================
--- lldb/trunk/source/Plugins/Process/Utility/RegisterContextDarwin_arm64.h 
(original)
+++ lldb/trunk/source/Plugins/Process/Utility/RegisterContextDarwin_arm64.h Wed 
Nov 15 16:50:29 2017
@@ -78,7 +78,7 @@ public:
   };
 
   struct VReg {
-    uint8_t bytes[16];
+    llvm::AlignedCharArray<16, 16> bytes;
   };
 
   // mirrors <mach/arm/thread_status.h> arm_neon_state64_t


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