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Merge pull request #2091 from FearlessTobi/port-4603

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Port citra-emu/citra#4603: "gdbstub: only let Execute breakpoints write/restore BKPT opcodes into target memory"
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bunnei 2019-02-06 21:51:46 -05:00 committed by GitHub
commit ca482997fe
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1 changed files with 10 additions and 4 deletions
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6
src/core/gdbstub/gdbstub.cpp
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@ -507,8 +507,11 @@ static void RemoveBreakpoint(BreakpointType type, VAddr addr) {
LOG_DEBUG(Debug_GDBStub, "gdb: removed a breakpoint: {:016X} bytes at {:016X} of type {}",
bp->second.len, bp->second.addr, static_cast<int>(type));
if (type == BreakpointType::Execute) {
Memory::WriteBlock(bp->second.addr, bp->second.inst.data(), bp->second.inst.size());
Core::System::GetInstance().InvalidateCpuInstructionCaches();
}
p.erase(addr);
}
@ -1057,9 +1060,12 @@ static bool CommitBreakpoint(BreakpointType type, VAddr addr, u64 len) {
breakpoint.addr = addr;
breakpoint.len = len;
Memory::ReadBlock(addr, breakpoint.inst.data(), breakpoint.inst.size());
static constexpr std::array<u8, 4> btrap{0x00, 0x7d, 0x20, 0xd4};
if (type == BreakpointType::Execute) {
Memory::WriteBlock(addr, btrap.data(), btrap.size());
Core::System::GetInstance().InvalidateCpuInstructionCaches();
}
p.insert({addr, breakpoint});
LOG_DEBUG(Debug_GDBStub, "gdb: added {} breakpoint: {:016X} bytes at {:016X}",