RGBCube/serenity
1
Fork 0
mirror of https://github.com/RGBCube/serenity synced 2025-07-25 16:07:47 +00:00
Code Issues Activity Actions

UserspaceEmulator+LibX86: Add support for 64-bit memory reads and writes (#3584)

Browse source 
This is useful for reading and writing doubles for #3329.
It is also useful for emulating 64-bit binaries.

MemoryOrRegisterReference assumes that 64-bit values are always
memory references since that's enough for fpu support. If we
ever want to emulate 64-bit binaries, that part will need minor
updating.
This commit is contained in:
Nico Weber 2020-09-23 14:45:43 -04:00 • committed by GitHub
parent 1fa5a526e8
commit f1c0f661f4
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
12 changed files with 156 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

4
DevTools/UserspaceEmulator/SoftMMU.h
View file

@ -52,10 +52,12 @@ public:
virtual void write8(u32 offset, ValueWithShadow<u8>) = 0;
virtual void write16(u32 offset, ValueWithShadow<u16>) = 0;
virtual void write32(u32 offset, ValueWithShadow<u32>) = 0;
virtual void write64(u32 offset, ValueWithShadow<u64>) = 0;
virtual ValueWithShadow<u8> read8(u32 offset) = 0;
virtual ValueWithShadow<u16> read16(u32 offset) = 0;
virtual ValueWithShadow<u32> read32(u32 offset) = 0;
virtual ValueWithShadow<u64> read64(u32 offset) = 0;
virtual u8* cacheable_ptr([[maybe_unused]] u32 offset) { return nullptr; }
virtual bool is_shared_buffer() const { return false; }
@ -85,10 +87,12 @@ public:
ValueWithShadow<u8> read8(X86::LogicalAddress);
ValueWithShadow<u16> read16(X86::LogicalAddress);
ValueWithShadow<u32> read32(X86::LogicalAddress);
ValueWithShadow<u64> read64(X86::LogicalAddress);
void write8(X86::LogicalAddress, ValueWithShadow<u8>);
void write16(X86::LogicalAddress, ValueWithShadow<u16>);
void write32(X86::LogicalAddress, ValueWithShadow<u32>);
void write64(X86::LogicalAddress, ValueWithShadow<u64>);
Region* find_region(X86::LogicalAddress);