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//===-- 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;
}
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