go/src/cmd/link/internal/ld/lib.go, branch makepkg

all: prealloc slice with possible minimum capabilities

2026-02-03T11:04:30Z

cmd/link: set canUsePlugins only on platforms that support plugin

2025-12-15T21:08:29Z

If a program imports the plugin package, but the plugin build mode is not supported on the platform, it still cannot use plugin. Don't treat it like so. Updates #76815. Change-Id: I0fd719427d7c3cc96a94ce1f92d6e4457da92a90 Reviewed-on: https://go-review.googlesource.com/c/go/+/730164 Reviewed-by: David Chase LUCI-TryBot-Result: Go LUCI

cmd/link: put moduledata in its own .go.module section

2025-11-27T04:07:41Z

There is a test for this in CL 721480 later in this series. For #76038 Change-Id: Ib7ed1f0b0aed2d929ca0f135b54d6b62112cae30 Reviewed-on: https://go-review.googlesource.com/c/go/+/720660 TryBot-Bypass: David Chase Reviewed-by: Cherry Mui Reviewed-by: David Chase

Revert "cmd/compile: redo arm64 LR/FP save and restore"

2025-10-07T15:21:14Z

This reverts commit 719dfcf8a8478d70360bf3c34c0e920be7b32994. Reason for revert: Causing crashes. Change-Id: I0b8526dd03d82fa074ce4f97f1789eeac702b3eb Reviewed-on: https://go-review.googlesource.com/c/go/+/709755 Reviewed-by: Keith Randall Reviewed-by: David Chase LUCI-TryBot-Result: Go LUCI Auto-Submit: Keith Randall Reviewed-by: Cherry Mui

cmd/compile: redo arm64 LR/FP save and restore

2025-10-06T21:11:41Z

Instead of storing LR (the return address) at 0(SP) and the FP (parent's frame pointer) at -8(SP), store them at framesize-8(SP) and framesize-16(SP), respectively. We push and pop data onto the stack such that we're never accessing anything below SP. The prolog/epilog lengths are unchanged (3 insns for a typical prolog, 2 for a typical epilog). We use 8 bytes more per frame. Typical prologue: STP.W (FP, LR), -16(SP) MOVD SP, FP SUB $C, SP Typical epilogue: ADD $C, SP LDP.P 16(SP), (FP, LR) RET The previous word where we stored LR, at 0(SP), is now unused. We could repurpose that slot for storing a local variable. The new prolog and epilog instructions are recognized by libunwind, so pc-sampling tools like perf should now be accurate. (TODO: except maybe after the first RET instruction? Have to look into that.) Update #73753 (fixes, for arm64) Update #57302 (Quim thinks this will help on that issue) Change-Id: I4800036a9a9a08aaaf35d9f99de79a36cf37ebb8 Reviewed-on: https://go-review.googlesource.com/c/go/+/674615 Reviewed-by: David Chase LUCI-TryBot-Result: Go LUCI Reviewed-by: Keith Randall

cmd/link: support .def file with MSVC clang toolchain

2025-10-03T13:30:28Z

lld-link supports .def file, but requires a "-def:" (or "/def:") flag. (MinGW linker, on the other hand, requires no flag.) Pass the flag when using MSVC-based toolchain. CL originally authored by Chressie Himpel. Change-Id: I8c327ab48d36b0bcbb1d127cff544ffdb06be38e Reviewed-on: https://go-review.googlesource.com/c/go/+/708716 LUCI-TryBot-Result: Go LUCI Reviewed-by: Chressie Himpel

cmd/link: use a .def file to mark exported symbols on Windows

2025-09-29T19:24:13Z

Binutils defaults to exporting all symbols when building a Windows DLL. To avoid that we were marking symbols with __declspec(dllexport) in the cgo-generated headers, which instructs ld to export only those symbols. However, that approach makes the headers hard to reuse when importing the resulting DLL into other projects, as imported symbols should be marked with __declspec(dllimport). A better approach is to generate a .def file listing the symbols to export, which gets the same effect without having to modify the headers. Updates #30674 Fixes #56994 Change-Id: I22bd0aa079e2be4ae43b13d893f6b804eaeddabf Reviewed-on: https://go-review.googlesource.com/c/go/+/705776 Reviewed-by: Michael Knyszek Reviewed-by: Junyang Shao Reviewed-by: Than McIntosh Reviewed-by: Cherry Mui LUCI-TryBot-Result: Go LUCI

cmd/link: don't pass -Wl,-S on Solaris

2025-09-29T17:10:22Z

Solaris linker's -S has a different meaning. Fixes #75637. Change-Id: I51e641d5bc6d7f64ab5aa280090c70ec787a1fbf Reviewed-on: https://go-review.googlesource.com/c/go/+/707096 LUCI-TryBot-Result: Go LUCI Reviewed-by: David Chase

cmd/link: don't pass -Wl,-S on AIX

2025-09-26T17:15:40Z

The AIX linker's -S flag has a different meaning. Don't pass it. Updates #75618. Change-Id: I98faabea3435cde255f4c2d25f34dde9f69b7ec9 Reviewed-on: https://go-review.googlesource.com/c/go/+/707097 LUCI-TryBot-Result: Go LUCI Reviewed-by: David Chase

cmd/link: handle -w flag in external linking mode

2025-09-25T16:24:46Z

Currently, when the -w flag is set, it doesn't actually disable the debug info generation with in external linking mode. (It does make the Go object have no debug info, but C objects may still have.) Pass "-Wl,-S" to let the external linker disable debug info generation. Change-Id: I0fce56b9f23a45546b69b9e6dd027c5527b1bc87 Reviewed-on: https://go-review.googlesource.com/c/go/+/705857 Reviewed-by: David Chase LUCI-TryBot-Result: Go LUCI Reviewed-by: Ian Lance Taylor