Files
totk-pc-recomp/runtime/platform
deadlynchandClaude Opus 5.5 7544cfd528 Align the stack of Linux fibers to the System V ABI
plat_fiber_entry is reached by a ret with rsp at top - 8 and called the fiber function without realigning, so the
function started with rsp = 0 mod 16 and every 16-byte local was off by 8. The VEX instructions of a v3 build
tolerate that; the SSE ones of a v2 build fault on it, and probe-kernel's fiber test crashed in same_regs on pcmpeqb
with a memory operand. plat_fiber_entry now aligns rsp to 16 bytes before the call.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
2026-11-05 01:07:45 -03:00
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