PowerPC: Initial SFrame support for 64-bit PowerPC ELF ABI
Gentle ping for review of v2 patch series for PowerPC SFrame support.
This email is a follow-up, or ‘gentle ping’, regarding the review of version 2 of a patch series that adds initial SFrame support for the 64-bit PowerPC ELF ABI in binutils. The author offers to rebase the series into a v3 if that would facilitate the review process.
- proposer
Follows up on the review of the v2 patch series for PowerPC SFrame support, offering to create a rebased v3 to ease the review process.
“Hi Indu, gentle ping on the v2 review - happy to post a rebased v3 instead if that's easier.”
- reviewer
Previously confirmed interest in reviewing the patch series and stated that v2 applies easily to the current master branch.
“Thanks for confirming. I should be able to work on the V2 (V2 seems to apply almost easily on current master).”
Technical Tradeoffs
- Implementing SFrame support requires careful adherence to the ABI, potentially impacting performance if not optimized.
- Ensuring compatibility with existing debugging tools and unwinders is crucial.
In Details
This is a follow-up on a patch series (v2) for adding SFrame support to the 64-bit PowerPC ELF ABI in binutils. SFrame is a stack frame unwinding mechanism. The author is seeking a review from Indu Bhagat and offers to provide a v3 if it simplifies the process. The core task involves implementing ABI-compliant stack frame setup and teardown for PowerPC 64-bit targets.
- SFrame
- A specific mechanism used for stack frame unwinding, particularly relevant for debugging and exception handling on certain architectures like PowerPC.
- PowerPC
- A family of RISC instruction set architectures developed by Apple, IBM, and Motorola.
- ELF ABI
- Executable and Linkable Format Application Binary Interface. Defines the low-level conventions for how programs are compiled, linked, and executed on a specific architecture and operating system.
- stack frame unwinding
- The process of determining the call stack at a given point, typically used by debuggers and exception handling mechanisms to reconstruct the sequence of function calls.