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authorGreg Clayton <gclayton@apple.com>2013-11-13 23:28:31 +0000
committerGreg Clayton <gclayton@apple.com>2013-11-13 23:28:31 +0000
commitf74cf86bc55b34e567c760212cb4bdb6158fd225 (patch)
treed6a775d137a7d653858f3df0faaf2367fd4f231e /lldb/tools/debugserver/source/MacOSX/arm/DNBArchImpl.cpp
parentbcccb5db2e88533941c0c63a8693bb71ca0ac318 (diff)
downloadbcm5719-llvm-f74cf86bc55b34e567c760212cb4bdb6158fd225.tar.gz
bcm5719-llvm-f74cf86bc55b34e567c760212cb4bdb6158fd225.zip
<rdar://problem/15172417>
Added two new GDB server packets to debugserver: "QSaveRegisterState" and "QRestoreRegiterState". "QSaveRegisterState" makes the remote GDB server save all register values and it returns a save identifier as an unsigned integer. This packet can be used prior to running expressions to save all registers. All registers can them we later restored with "QRestoreRegiterState:SAVEID" what SAVEID is the integer identifier that was returned from the call to QSaveRegisterState. Cleaned up redundant code in lldb_private::Thread, lldb_private::ThreadPlanCallFunction. Moved the lldb_private::Thread::RegisterCheckpoint into its own header file and it is now in the lldb_private namespace. Trimmed down the RegisterCheckpoint class to omit stuff that wasn't used (the stack ID). Added a few new virtual methods to lldb_private::RegisterContext that allow subclasses to efficiently save/restore register states and changed the RegisterContextGDBRemote to take advantage of these new calls. llvm-svn: 194621
Diffstat (limited to 'lldb/tools/debugserver/source/MacOSX/arm/DNBArchImpl.cpp')
-rw-r--r--lldb/tools/debugserver/source/MacOSX/arm/DNBArchImpl.cpp52
1 files changed, 52 insertions, 0 deletions
diff --git a/lldb/tools/debugserver/source/MacOSX/arm/DNBArchImpl.cpp b/lldb/tools/debugserver/source/MacOSX/arm/DNBArchImpl.cpp
index 75282c5966c..88073afee00 100644
--- a/lldb/tools/debugserver/source/MacOSX/arm/DNBArchImpl.cpp
+++ b/lldb/tools/debugserver/source/MacOSX/arm/DNBArchImpl.cpp
@@ -1805,5 +1805,57 @@ DNBArchMachARM::SetRegisterContext (const void *buf, nub_size_t buf_len)
}
+uint32_t
+DNBArchMachARM::SaveRegisterState ()
+{
+ kern_return_t kret = ::thread_abort_safely(m_thread->MachPortNumber());
+ DNBLogThreadedIf (LOG_THREAD, "thread = 0x%4.4x calling thread_abort_safely (tid) => %u (SetGPRState() for stop_count = %u)", m_thread->MachPortNumber(), kret, m_thread->Process()->StopCount());
+
+ // Always re-read the registers because above we call thread_abort_safely();
+ bool force = true;
+
+ if ((kret = GetGPRState(force)) != KERN_SUCCESS)
+ {
+ DNBLogThreadedIf (LOG_THREAD, "DNBArchMachARM::SaveRegisterState () error: GPR regs failed to read: %u ", kret);
+ }
+ else if ((kret = GetFPUState(force)) != KERN_SUCCESS)
+ {
+ DNBLogThreadedIf (LOG_THREAD, "DNBArchMachARM::SaveRegisterState () error: %s regs failed to read: %u", CPUHasAVX() ? "AVX" : "FPU", kret);
+ }
+ else
+ {
+ const uint32_t save_id = GetNextRegisterStateSaveID ();
+ m_saved_register_states[save_id] = m_state.context;
+ return save_id;
+ }
+ return UINT32_MAX;
+}
+bool
+DNBArchMachARM::RestoreRegisterState (uint32_t save_id)
+{
+ SaveRegiterStates::iterator pos = m_saved_register_states.find(save_id);
+ if (pos != m_saved_register_states.end())
+ {
+ m_state.context.gpr = pos->second.gpr;
+ m_state.context.vfp = pos->second.vfp;
+ kern_return_t kret;
+ bool success = true;
+ if ((kret = SetGPRState()) != KERN_SUCCESS)
+ {
+ DNBLogThreadedIf (LOG_THREAD, "DNBArchMachARM::RestoreRegisterState (save_id = %u) error: GPR regs failed to write: %u", save_id, kret);
+ success = false;
+ }
+ else if ((kret = SetFPUState()) != KERN_SUCCESS)
+ {
+ DNBLogThreadedIf (LOG_THREAD, "DNBArchMachARM::RestoreRegisterState (save_id = %u) error: %s regs failed to write: %u", save_id, CPUHasAVX() ? "AVX" : "FPU", kret);
+ success = false;
+ }
+ m_saved_register_states.erase(pos);
+ return success;
+ }
+ return false;
+}
+
+
#endif // #if defined (__arm__)
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