[LLDB][MIPS] Fix ReadRegisterValue for registers with constant 32 bit size regardless of ABI

Reviewers: clayborg, tberghammer.
Subscribers: jaydeep, bhushan, sagar, nitesh.jain, lldb-commits.
Differential Revision: http://reviews.llvm.org/D16060

llvm-svn: 257447

1 files changed, 9 insertions, 1 deletions

diff --git a/lldb/source/Plugins/Process/Linux/NativeRegisterContextLinux_mips64.cpp b/lldb/source/Plugins/Process/Linux/NativeRegisterContextLinux_mips64.cpp
index 3cfeaf5546b..c4880017765 100644
--- a/lldb/source/Plugins/Process/Linux/NativeRegisterContextLinux_mips64.cpp
+++ b/lldb/source/Plugins/Process/Linux/NativeRegisterContextLinux_mips64.cpp
@@ -1388,7 +1388,15 @@ NativeRegisterContextLinux_mips64::DoReadRegisterValue(uint32_t offset,
     {
         lldb_private::ArchSpec arch;
         if (m_thread.GetProcess()->GetArchitecture(arch))
-            value.SetBytes((void *)(((unsigned char *)&regs) + offset + 4 * (arch.GetMachine() == llvm::Triple::mips)), arch.GetFlags() & lldb_private::ArchSpec::eMIPSABI_O32 ? 4 : 8, arch.GetByteOrder());
+        {
+            void* target_address = ((uint8_t*)&regs) + offset + 4 * (arch.GetMachine() == llvm::Triple::mips;
+            uint32_t target_size;
+            if ((::strcmp(reg_name, "sr") == 0) || (::strcmp(reg_name, "cause") == 0) || (::strcmp(reg_name, "config5") == 0))
+                target_size = 4;
+            else
+                target_size = arch.GetFlags() & lldb_private::ArchSpec::eMIPSABI_O32 ? 4 : 8;
+            value.SetBytes(target_address, target_size, arch.GetByteOrder());
+        }
         else
             error.SetErrorString("failed to get architecture");
     }