diff options
Diffstat (limited to 'contrib/llvm-project/lldb/source/Plugins/Process/FreeBSDKernel/RegisterContextFreeBSDKernel_i386.cpp')
-rw-r--r-- | contrib/llvm-project/lldb/source/Plugins/Process/FreeBSDKernel/RegisterContextFreeBSDKernel_i386.cpp | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/contrib/llvm-project/lldb/source/Plugins/Process/FreeBSDKernel/RegisterContextFreeBSDKernel_i386.cpp b/contrib/llvm-project/lldb/source/Plugins/Process/FreeBSDKernel/RegisterContextFreeBSDKernel_i386.cpp new file mode 100644 index 000000000000..fde85c9c9f0d --- /dev/null +++ b/contrib/llvm-project/lldb/source/Plugins/Process/FreeBSDKernel/RegisterContextFreeBSDKernel_i386.cpp @@ -0,0 +1,83 @@ +//===-- RegisterContextFreeBSDKernel_i386.cpp -----------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#include "RegisterContextFreeBSDKernel_i386.h" + +#include "lldb/Target/Process.h" +#include "lldb/Target/Thread.h" +#include "lldb/Utility/RegisterValue.h" +#include "llvm/Support/Endian.h" + +using namespace lldb; +using namespace lldb_private; + +RegisterContextFreeBSDKernel_i386::RegisterContextFreeBSDKernel_i386( + Thread &thread, RegisterInfoInterface *register_info, lldb::addr_t pcb_addr) + : RegisterContextPOSIX_x86(thread, 0, register_info), m_pcb_addr(pcb_addr) { +} + +bool RegisterContextFreeBSDKernel_i386::ReadGPR() { return true; } + +bool RegisterContextFreeBSDKernel_i386::ReadFPR() { return true; } + +bool RegisterContextFreeBSDKernel_i386::WriteGPR() { + assert(0); + return false; +} + +bool RegisterContextFreeBSDKernel_i386::WriteFPR() { + assert(0); + return false; +} + +bool RegisterContextFreeBSDKernel_i386::ReadRegister( + const RegisterInfo *reg_info, RegisterValue &value) { + if (m_pcb_addr == LLDB_INVALID_ADDRESS) + return false; + + struct { + llvm::support::ulittle32_t edi; + llvm::support::ulittle32_t esi; + llvm::support::ulittle32_t ebp; + llvm::support::ulittle32_t esp; + llvm::support::ulittle32_t ebx; + llvm::support::ulittle32_t eip; + } pcb; + + Status error; + size_t rd = + m_thread.GetProcess()->ReadMemory(m_pcb_addr, &pcb, sizeof(pcb), error); + if (rd != sizeof(pcb)) + return false; + + uint32_t reg = reg_info->kinds[lldb::eRegisterKindLLDB]; + switch (reg) { +#define REG(x) \ + case lldb_##x##_i386: \ + value = pcb.x; \ + break; + + REG(edi); + REG(esi); + REG(ebp); + REG(esp); + REG(eip); + +#undef REG + + default: + return false; + } + + return true; +} + +bool RegisterContextFreeBSDKernel_i386::WriteRegister( + const RegisterInfo *reg_info, const RegisterValue &value) { + return false; +} |