0 Fork 0

mirror of https://github.com/FEX-Emu/FEX.git synced 2026-10-25 16:00:12 +01:00

Files

T

Ryan Houdek 82ad26307c Dispatcher: Calculate REG_ERR correctly using ARM ESR_EL1

On Fault then ARM will return information about the fault in ESR_EL1 to
the user.

We need to decode what ESR_EL1 means in the context of the fault to get
the flags we care about.

The flags we care about specifically are PF_USER and PF_WRITE.
PF_PROT would have been interesting but I didn't see when this gets
returned to the user. ARM makes the difference if the page is unmapped
or "mapped" with PROT_NONE. x86 doesn't make the distinction here.

This should fix an issue that a user was hitting.

2022-12-09 15:44:11 -08:00

docs

IR: Add AOT Cache

2021-02-23 12:08:57 +02:00

include

Core: Replace a couple maps with tsl robin_map

2022-11-27 04:35:27 -08:00

Scripts

json_ir_generator: Remove Args() functions from IR structs

2022-07-19 11:23:13 -04:00

Source

Dispatcher: Calculate REG_ERR correctly using ARM ESR_EL1

2022-12-09 15:44:11 -08:00

CMakeLists.txt

CMake: Extend AArch64 check to include arm64

2022-09-08 15:34:35 -07:00

LICENSE

FEXCore: Move to Externals/FEXCore

2020-03-06 09:07:37 +02:00

Readme.md

docs: Remove stale text

2022-03-29 11:27:43 +02:00

Readme.md

FEXCore - Fast x86 Core emulation library

This is the core emulation library that is used for the FEX emulator project. This project aims to provide a fast and functional x86-64 emulation library that can meet and surpass other x86-64 emulation libraries.

Goals

Be as fast as possible, beating and exceeding current options for x86-64 emulation
- 25% - 50% lower performance than native code would be desired target
- Use an IR to efficiently translate x86-64 to our host architecture
- Support a tiered recompiler to allow for fast runtime performance
- Support offline compilation and offline tooling for inspection and performance analysis
- Support threaded emulation. Including emulating x86-64's strong memory model on weak memory model architectures
Support a significant portion of the x86-64 instruction space.
- Including MMX, SSE, SSE2, SSE3, SSSE3, and SSE4*
Support fallback routines for uncommonly used x86-64 instructions
- Including x87 and 3DNow!
Only support userspace emulation.
- All x86-64 instructions run as if they are under CPL-3(userland) security layer
Minimal Linux Syscall emulation for testing purposes
Portable library implementation in order to support easy integration in to applications

Target Host Architecture

The target host architecture for this library is AArch64. Specifically the ARMv8.1 version or newer. The CPU IR is designed with AArch64 in mind but should allow for other architectures as well. x86-64 host support is available for ease of development, but is not a priority.

Not desired

Kernel space emulation
CPL0-2 emulation
Real Mode, Protected Mode, Virtual-8086 Mode, System Management Mode
IRQs
SVM
"Cycle Accurate" emulation