diff options
Diffstat (limited to 'lldb/source/Plugins/UnwindAssembly/InstEmulation/UnwindAssemblyInstEmulation.cpp')
| -rw-r--r-- | lldb/source/Plugins/UnwindAssembly/InstEmulation/UnwindAssemblyInstEmulation.cpp | 50 |
1 files changed, 40 insertions, 10 deletions
diff --git a/lldb/source/Plugins/UnwindAssembly/InstEmulation/UnwindAssemblyInstEmulation.cpp b/lldb/source/Plugins/UnwindAssembly/InstEmulation/UnwindAssemblyInstEmulation.cpp index 4aa9fb634b61..1bc071c2b161 100644 --- a/lldb/source/Plugins/UnwindAssembly/InstEmulation/UnwindAssemblyInstEmulation.cpp +++ b/lldb/source/Plugins/UnwindAssembly/InstEmulation/UnwindAssemblyInstEmulation.cpp @@ -1,4 +1,4 @@ -//===-- UnwindAssemblyInstEmulation.cpp --------------------------*- C++-*-===// +//===-- UnwindAssemblyInstEmulation.cpp -----------------------------------===// // // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. // See https://llvm.org/LICENSE.txt for license information. @@ -28,6 +28,8 @@ using namespace lldb; using namespace lldb_private; +LLDB_PLUGIN_DEFINE(UnwindAssemblyInstEmulation) + // UnwindAssemblyInstEmulation method definitions bool UnwindAssemblyInstEmulation::GetNonCallSiteUnwindPlanFromAssembly( @@ -123,18 +125,12 @@ bool UnwindAssemblyInstEmulation::GetNonCallSiteUnwindPlanFromAssembly( // Add the initial state to the save list with offset 0. saved_unwind_states.insert({0, {last_row, m_register_values}}); - // cache the pc register number (in whatever register numbering this - // UnwindPlan uses) for quick reference during instruction parsing. - RegisterInfo pc_reg_info; - m_inst_emulator_up->GetRegisterInfo( - eRegisterKindGeneric, LLDB_REGNUM_GENERIC_PC, pc_reg_info); - - // cache the return address register number (in whatever register + // cache the stack pointer register number (in whatever register // numbering this UnwindPlan uses) for quick reference during // instruction parsing. - RegisterInfo ra_reg_info; + RegisterInfo sp_reg_info; m_inst_emulator_up->GetRegisterInfo( - eRegisterKindGeneric, LLDB_REGNUM_GENERIC_RA, ra_reg_info); + eRegisterKindGeneric, LLDB_REGNUM_GENERIC_SP, sp_reg_info); // The architecture dependent condition code of the last processed // instruction. @@ -165,6 +161,23 @@ bool UnwindAssemblyInstEmulation::GetNonCallSiteUnwindPlanFromAssembly( *newrow = *it->second.first; m_curr_row.reset(newrow); m_register_values = it->second.second; + // re-set the CFA register ivars to match the + // new m_curr_row. + if (sp_reg_info.name && + m_curr_row->GetCFAValue().IsRegisterPlusOffset()) { + uint32_t row_cfa_regnum = + m_curr_row->GetCFAValue().GetRegisterNumber(); + lldb::RegisterKind row_kind = + m_unwind_plan_ptr->GetRegisterKind(); + // set m_cfa_reg_info to the row's CFA reg. + m_inst_emulator_up->GetRegisterInfo(row_kind, row_cfa_regnum, + m_cfa_reg_info); + // set m_fp_is_cfa. + if (sp_reg_info.kinds[row_kind] == row_cfa_regnum) + m_fp_is_cfa = false; + else + m_fp_is_cfa = true; + } } m_inst_emulator_up->SetInstruction(inst->GetOpcode(), @@ -195,6 +208,23 @@ bool UnwindAssemblyInstEmulation::GetNonCallSiteUnwindPlanFromAssembly( std::make_shared<UnwindPlan::Row>(*saved_state.first); m_curr_row->SetOffset(current_offset); m_register_values = saved_state.second; + // re-set the CFA register ivars to match the + // new m_curr_row. + if (sp_reg_info.name && + m_curr_row->GetCFAValue().IsRegisterPlusOffset()) { + uint32_t row_cfa_regnum = + m_curr_row->GetCFAValue().GetRegisterNumber(); + lldb::RegisterKind row_kind = + m_unwind_plan_ptr->GetRegisterKind(); + // set m_cfa_reg_info to the row's CFA reg. + m_inst_emulator_up->GetRegisterInfo(row_kind, row_cfa_regnum, + m_cfa_reg_info); + // set m_fp_is_cfa. + if (sp_reg_info.kinds[row_kind] == row_cfa_regnum) + m_fp_is_cfa = false; + else + m_fp_is_cfa = true; + } bool replace_existing = true; // The last instruction might already // created a row for this offset and |