forked from Imagelibrary/seL4
96a5894cf3
Fixes interrupt flag reset upon nested interrupt resume. There were intermittent test failures on x86/32 characterised by assertion failures at `c_nested_interrupt()`. The kernel only allows one pending interrupt at a time, yet the kernel was entering `c_nested_interrupt()` multiple times during a single entry-exit. This should have been disallowed by `getActiveIRQ()` checking against any pending interrupts. `c_nested_interrupt()` is "entered" by the pc99-specific `receivePendingIRQ()` helper (i.e. `sti; nop; cli`). If the nested interrupt handler fails to clear the interrupt flag before running `iret`, there's a small window between `nop; cli` that could trigger a second nested interrupt. This fixes the nested interrupt trap to correctly clear the interrupt flag in the EFLAGS register that is restored upon `iret`. Signed-off-by: Michael Yoo <Michael.Yoo@data61.csiro.au>
The seL4 microkernel
This project contains the source code of seL4 microkernel.
For details about the seL4 microkernel, including details about its formal
correctness proof, please see the sel4.systems website and associated
FAQ.
DOIs for citing recent releases of this repository:
We welcome contributions to seL4. Please see the website for information on how to contribute.
This repository is usually not used in isolation, but as part of the build system in a larger project.
seL4 Basics
- Tutorials
- Documentation
- seL4 libraries
- seL4Test
- Debugging guide
- Benchmarking guide
- Virtualization on seL4
- Host Build Dependencies
- Porting seL4
Community
- Mailing lists
- Suggested projects
- CommunityProjects
Manual
A hosted version of the manual for the most recent release can be found here.
A web version of the API can be found here
Repository Overview
includeandsrc: C and ASM source code of seL4tools: build toolslibsel4: C bindings for the seL4 ABImanual: LaTeX sources of the seL4 reference manual
Build Instructions
See the seL4 website for build instructions.
Status
A list of releases and current project status can be found under seL4 releases.
- Roadmap: new features in development
- Hardware Support: information about hardware platform ports
- Kernel Features: information about available kernel features
- Userland Components and Drivers: available device drivers and userland components