[MIPS] - Register Context for MIPS64

Patch by Jaydeep Patil

Summery:
1. Add MIPS variants by parsing e_flags of the ELF
2. Create RegisterInfoInterface and RegisterContext for MIPS64 and MIPS64EL

Reviewers: clayborg

Subscribers: tberghammer, bhushan, mohit.bhakkad, sagar

Differential Revision: http://reviews.llvm.org/D8166

llvm-svn: 232467

1 files changed, 213 insertions, 0 deletions

diff --git a/lldb/source/Plugins/Process/Linux/NativeRegisterContextLinux_mips64.cpp b/lldb/source/Plugins/Process/Linux/NativeRegisterContextLinux_mips64.cpp
new file mode 100644
index 00000000000..67363ca6bbc
--- /dev/null
+++ b/lldb/source/Plugins/Process/Linux/NativeRegisterContextLinux_mips64.cpp
@@ -0,0 +1,213 @@
+//===-- NativeRegisterContextLinux_mips64.cpp ---------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "NativeRegisterContextLinux_mips64.h"
+
+#include "lldb/lldb-private-forward.h"
+#include "lldb/Core/DataBufferHeap.h"
+#include "lldb/Core/Error.h"
+#include "lldb/Core/RegisterValue.h"
+#include "lldb/Host/common/NativeProcessProtocol.h"
+#include "lldb/Host/common/NativeThreadProtocol.h"
+#include "Plugins/Process/Linux/NativeProcessLinux.h"
+
+using namespace lldb_private;
+
+// ----------------------------------------------------------------------------
+// Private namespace.
+// ----------------------------------------------------------------------------
+
+namespace
+{
+    // mips64 general purpose registers.
+    const uint32_t
+    g_gp_regnums_mips64[] =
+    {
+        gp_reg_r0_mips64,
+        gp_reg_r1_mips64,
+        gp_reg_r2_mips64,
+        gp_reg_r3_mips64,
+        gp_reg_r4_mips64,
+        gp_reg_r5_mips64,
+        gp_reg_r6_mips64,
+        gp_reg_r7_mips64,
+        gp_reg_r8_mips64,
+        gp_reg_r9_mips64,
+        gp_reg_r10_mips64,
+        gp_reg_r11_mips64,
+        gp_reg_r12_mips64,
+        gp_reg_r13_mips64,
+        gp_reg_r14_mips64,
+        gp_reg_r15_mips64,
+        gp_reg_r16_mips64,
+        gp_reg_r17_mips64,
+        gp_reg_r18_mips64,
+        gp_reg_r19_mips64,
+        gp_reg_r20_mips64,
+        gp_reg_r21_mips64,
+        gp_reg_r22_mips64,
+        gp_reg_r23_mips64,
+        gp_reg_r24_mips64,
+        gp_reg_r25_mips64,
+        gp_reg_r26_mips64,
+        gp_reg_r27_mips64,
+        gp_reg_r28_mips64,
+        gp_reg_r29_mips64,
+        gp_reg_r30_mips64,
+        gp_reg_r31_mips64,
+        gp_reg_mullo_mips64,
+        gp_reg_mulhi_mips64,
+        gp_reg_pc_mips64,
+        gp_reg_badvaddr_mips64,
+        gp_reg_sr_mips64,
+        gp_reg_cause_mips64,
+        LLDB_INVALID_REGNUM     // register sets need to end with this flag
+    };
+
+    static_assert((sizeof(g_gp_regnums_mips64) / sizeof(g_gp_regnums_mips64[0])) - 1 == k_num_gp_reg_mips64,
+                  "g_gp_regnums_mips64 has wrong number of register infos");
+
+    // Number of register sets provided by this context.
+    enum
+    {
+        k_num_register_sets = 1
+    };
+
+    // Register sets for mips64.
+    static const RegisterSet
+    g_reg_sets_mips64[k_num_register_sets] =
+    {
+        { "General Purpose Registers",  "gpr", k_num_gp_reg_mips64, g_gp_regnums_mips64 }
+    };
+}
+
+// ----------------------------------------------------------------------------
+// NativeRegisterContextLinux_mips64 members.
+// ----------------------------------------------------------------------------
+
+NativeRegisterContextLinux_mips64::NativeRegisterContextLinux_mips64 (NativeThreadProtocol &native_thread, 
+        uint32_t concrete_frame_idx, RegisterInfoInterface *reg_info_interface_p) :
+    NativeRegisterContextRegisterInfo (native_thread, concrete_frame_idx, reg_info_interface_p)
+{
+}
+
+uint32_t
+NativeRegisterContextLinux_mips64::GetRegisterSetCount () const
+{
+    return k_num_register_sets;
+}
+
+const lldb_private::RegisterSet *
+NativeRegisterContextLinux_mips64::GetRegisterSet (uint32_t set_index) const
+{
+    if (set_index >= k_num_register_sets)
+        return nullptr;
+
+    switch (GetRegisterInfoInterface ().GetTargetArchitecture ().GetMachine ())
+    {
+        case llvm::Triple::mips64:
+        case llvm::Triple::mips64el:
+            return &g_reg_sets_mips64[set_index];
+        default:
+            assert (false && "Unhandled target architecture.");
+            return nullptr;
+    }
+
+    return nullptr;
+}
+
+lldb_private::Error
+NativeRegisterContextLinux_mips64::ReadRegister (const RegisterInfo *reg_info, RegisterValue &reg_value)
+{
+    Error error;
+    error.SetErrorString ("MIPS TODO: NativeRegisterContextLinux_mips64::ReadRegister not implemented");
+    return error;
+}
+
+lldb_private::Error
+NativeRegisterContextLinux_mips64::WriteRegister (const RegisterInfo *reg_info, const RegisterValue &reg_value)
+{
+    Error error;
+    error.SetErrorString ("MIPS TODO: NativeRegisterContextLinux_mips64::WriteRegister not implemented");
+    return error;
+}
+
+lldb_private::Error
+NativeRegisterContextLinux_mips64::ReadAllRegisterValues (lldb::DataBufferSP &data_sp)
+{
+    Error error;
+    error.SetErrorString ("MIPS TODO: NativeRegisterContextLinux_mips64::ReadAllRegisterValues not implemented");
+    return error;
+}
+
+lldb_private::Error
+NativeRegisterContextLinux_mips64::WriteAllRegisterValues (const lldb::DataBufferSP &data_sp)
+{
+    Error error;
+    error.SetErrorString ("MIPS TODO: NativeRegisterContextLinux_mips64::WriteAllRegisterValues not implemented");
+    return error;
+}
+
+Error
+NativeRegisterContextLinux_mips64::IsWatchpointHit (uint8_t wp_index)
+{
+    Error error;
+    error.SetErrorString ("MIPS TODO: NativeRegisterContextLinux_mips64::IsWatchpointHit not implemented");
+    return error;
+}
+
+Error
+NativeRegisterContextLinux_mips64::IsWatchpointVacant (uint32_t wp_index)
+{
+    Error error;
+    error.SetErrorString ("MIPS TODO: NativeRegisterContextLinux_mips64::IsWatchpointVacant not implemented");
+    return error;
+}
+
+bool
+NativeRegisterContextLinux_mips64::ClearHardwareWatchpoint (uint32_t wp_index)
+{
+    return false;
+}
+
+Error
+NativeRegisterContextLinux_mips64::ClearAllHardwareWatchpoints ()
+{
+    Error error;
+    error.SetErrorString ("MIPS TODO: NativeRegisterContextLinux_mips64::ClearAllHardwareWatchpoints not implemented");
+    return error;
+}
+
+Error
+NativeRegisterContextLinux_mips64::SetHardwareWatchpointWithIndex (
+        lldb::addr_t addr, size_t size, uint32_t watch_flags, uint32_t wp_index) 
+{
+    Error error;
+    error.SetErrorString ("MIPS TODO: NativeRegisterContextLinux_mips64::SetHardwareWatchpointWithIndex not implemented");
+    return error;
+}
+
+uint32_t
+NativeRegisterContextLinux_mips64::SetHardwareWatchpoint (
+        lldb::addr_t addr, size_t size, uint32_t watch_flags)
+{
+    return LLDB_INVALID_INDEX32;
+}
+
+lldb::addr_t
+NativeRegisterContextLinux_mips64::GetWatchpointAddress (uint32_t wp_index)
+{
+    return LLDB_INVALID_ADDRESS;
+}
+
+uint32_t
+NativeRegisterContextLinux_mips64::NumSupportedHardwareWatchpoints ()
+{
+    return 0;
+}