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base repository: ebitengine/purego
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base: v0.11.2
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head repository: ebitengine/purego
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compare: v0.11.3
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  • 2 commits
  • 5 files changed
  • 2 contributors

Commits on Nov 1, 2026

  1. .github/workflows: use a Bootlin GCC for linux/mips (#556) 

    ubuntu-latest now runs Ubuntu 26.04, which no longer provides
gcc-mips-linux-gnu. Installing it failed, and fail-fast then cancelled
the rest of the test matrix. Debian is dropping its mips
cross-compilers as well.

Download a prebuilt mips32 glibc GCC toolchain from Bootlin, verify its
SHA-256, and use it as CC for the linux/mips Cgo build. This no longer
depends on any distribution's packages. The toolchain runs only on
x86_64 hosts, so the build now runs on ubuntu-latest only instead of
also on ubuntu-24.04-arm.

Closes #560

Co-authored-by: Claude Opus 5.5 <[email protected]>
    @hajimehoshi @claude
    hajimehoshi and claude committed Nov 1, 2026
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  2. all: align the stack for C calls on linux/386 (#558) 

    The i386 System V ABI requires the stack pointer to be 16-byte aligned
at a call, and compilers rely on it for aligned SSE stack accesses such
as movaps, which fault otherwise. Two linux/386 trampolines broke this.
syscallX is entered on an aligned stack from runtime.asmcgocall, but
its register saves and fixed frame left ESP at 12 mod 16 at the call.
linux/386 uses this path with Cgo enabled too. call5 in fakecgo, which
calls pthread_create, malloc, setenv and others, did not realign at
all, so its alignment depended on the calling Go frame.

Save SP in the callee-saved BP and align SP with ANDL before placing
the arguments in both trampolines, as call5 already does on amd64.

Add a test that calls a naked C function returning the caller's stack
pointer modulo 16 at the call. It runs on linux/386 and on amd64, where
the alignment in syscallX depends on its frame size.

Also rename the FP operands in the 386 setg_trampoline and call5 to
match their Go declarations, which fixes go vet's asmdecl reports. The
generated code is unchanged.

Closes #458

Co-authored-by: Claude Opus 5.5 <[email protected]>
    @hajimehoshi @claude
    hajimehoshi and claude committed Nov 1, 2026
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