deadprogram 3c07a36e95 loader, unicode/utf8: fix hiBits overflow on 16-bit AVR targets ...

Go 1.26 added SWAR optimizations to unicode/utf8 that use:

  const ptrSize = 4 << (^uintptr(0) >> 63)
  const hiBits = 0x8080808080808080 >> (64 - 8*ptrSize)

This formula only distinguishes 32-bit and 64-bit architectures.
On AVR (16-bit uintptr), ptrSize computes as 4, and hiBits becomes
0x80808080 (2155905152) which overflows the 16-bit uintptr type.

Fix by providing a patched unicode/utf8 overlay for Go 1.26+ that
uses a ptrSize formula handling all three sizes (16/32/64-bit):

  const ptrSize = 1 << (^uintptr(0)>>15&1 + ^uintptr(0)>>31&1 + ^uintptr(0)>>63&1)

This evaluates to 2 on AVR, 4 on 32-bit, and 8 on 64-bit. The
word() helper also gains a ptrSize==2 case for 16-bit loads.

2026-04-11 12:38:36 +01:00

..

errors.go

main: match go test output

2021-05-06 20:04:16 +02:00

goroot.go

loader, unicode/utf8: fix hiBits overflow on 16-bit AVR targets

2026-04-11 12:38:36 +01:00

list.go

compileopts: always enable CGo

2024-02-19 17:53:36 +01:00

loader_go122.go

loader: make sure Go version is plumbed through

2024-01-19 21:23:58 +01:00

loader.go

loader: support "all:" prefix in //go:embed patterns

2026-04-05 14:15:40 +02:00

ssa.go

go.*: upgrade golang.org/x/tools to v0.30.0, Go to 1.22

2025-05-06 10:05:20 +02:00