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go/misc
Cuong Manh Le 0f8dffd0aa all: use ":" for compiler generated symbols
As it can't appear in user package paths.

There is a hack for handling "go:buildid" and "type:*" on windows/386.

Previously, windows/386 requires underscore prefix on external symbols,
but that's only applied for SHOSTOBJ/SUNDEFEXT or cgo export symbols.
"go.buildid" is STEXT, "type.*" is STYPE, thus they are not prefixed
with underscore.

In external linking mode, the external linker can't resolve them as
external symbols. But we are lucky that they have "." in their name,
so the external linker see them as Forwarder RVA exports. See:

 - https://docs.microsoft.com/en-us/windows/win32/debug/pe-format#export-address-table
 - https://sourceware.org/git/?p=binutils-gdb.git;a=blob;f=ld/pe-dll.c;h=e7b82ba6ffadf74dc1b9ee71dc13d48336941e51;hb=HEAD#l972)

This CL changes "." to ":" in symbols name, so theses symbols can not be
found by external linker anymore. So a hacky way is adding the
underscore prefix for these 2 symbols. I don't have enough knowledge to
verify whether adding the underscore for all STEXT/STYPE symbols are
fine, even if it could be, that would be done in future CL.

Fixes #37762

Change-Id: I92eaaf24c0820926a36e0530fdb07b07af1fcc35
Reviewed-on: https://go-review.googlesource.com/c/go/+/317917
Reviewed-by: Than McIntosh <thanm@google.com>
Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
2022-08-09 11:28:56 +00:00
..
android all: gofmt more (but vendor, testdata, and top-level test directories) 2021-08-13 20:45:17 +00:00
arm
cgo all: use ":" for compiler generated symbols 2022-08-09 11:28:56 +00:00
chrome/gophertool docs: fix case of GitHub 2021-03-05 02:35:21 +00:00
ios all: gofmt main repo 2022-04-11 16:34:30 +00:00
linkcheck all: use bytes.Cut, strings.Cut 2021-10-06 15:53:04 +00:00
reboot misc/reboot: don't use symlinks when copying GOROOT/src 2022-02-08 15:30:12 +00:00
swig
wasm cmd/link: increase reserved space for passing env on wasm 2021-10-25 20:08:25 +00:00
editors
go.mod cmd/cgo: update to handle ast.IndexListExpr 2021-10-07 18:02:14 +00:00