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UserspaceEmulator+LibC: Use sys$emuctl() to pass malloc info to UE

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Get rid of the awkward secret handshake sequence between malloc and UE
and simply use sys$emuctl() to notify UE of malloc, free and realloc.
This commit is contained in:
Andreas Kling 2021-03-09 08:56:35 +01:00
parent 4faeaf101c
commit 9588f01739
8 changed files with 44 additions and 90 deletions
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33
Userland/DevTools/UserspaceEmulator/SoftCPU.cpp
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@ -112,22 +112,6 @@ void SoftCPU::dump() const
fflush(stdout);
}
void SoftCPU::did_receive_secret_data()
{
if (m_secret_data[0] == 1) {
if (auto* tracer = m_emulator.malloc_tracer())
tracer->target_did_malloc({}, m_secret_data[2], m_secret_data[1]);
} else if (m_secret_data[0] == 2) {
if (auto* tracer = m_emulator.malloc_tracer())
tracer->target_did_free({}, m_secret_data[1]);
} else if (m_secret_data[0] == 3) {
if (auto* tracer = m_emulator.malloc_tracer())
tracer->target_did_realloc({}, m_secret_data[2], m_secret_data[1]);
} else {
VERIFY_NOT_REACHED();
}
}
void SoftCPU::update_code_cache()
{
auto* region = m_emulator.mmu().find_region({ cs(), eip() });
@ -2757,18 +2741,6 @@ void SoftCPU::PUSH_reg16(const X86::Instruction& insn)
void SoftCPU::PUSH_reg32(const X86::Instruction& insn)
{
push32(gpr32(insn.reg32()));
if (m_secret_handshake_state == 2) {
m_secret_data[0] = gpr32(insn.reg32()).value();
++m_secret_handshake_state;
} else if (m_secret_handshake_state == 3) {
m_secret_data[1] = gpr32(insn.reg32()).value();
++m_secret_handshake_state;
} else if (m_secret_handshake_state == 4) {
m_secret_data[2] = gpr32(insn.reg32()).value();
m_secret_handshake_state = 0;
did_receive_secret_data();
}
}
template<typename T, bool cf>
@ -2964,11 +2936,6 @@ void SoftCPU::SALC(const X86::Instruction&)
{
// FIXME: Respect shadow flags once they exists!
set_al(shadow_wrap_as_initialized<u8>(cf() ? 0xff : 0x00));
if (m_secret_handshake_state < 2)
++m_secret_handshake_state;
else
m_secret_handshake_state = 0;
}
template<typename T>