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Than McIntosh e4c01f088b cmd/link: additional fixes for -newobj and "ld -r" ELF host objects
The previous fix for this issue (CL 208479) was not general enough;
this patch revises it to handle more cases.

The problem with the original fix was that once a sym.Symbol is
created for a given static symbol and given a bogus anonymous version
of -1, we hit problems if some other non-anonymous symbol (created by
host object loading) had relocations targeting the static symbol.

In this patch instead of assigning a fixed anonymous version of -1 to
such symbols, each time loader.Create is invoked we create a new
(unique) anonymous version for the sym.Symbol, then enter the result
into the loader's extStaticSyms map, permitting it to be found in
lookups when processing relocation targets.

NB: this code will hopefully get a lot simpler once we can move host
object loading away from early sym.Symbol creation.

Updates #35779.

Change-Id: I450ff577e17549025565d355d6707a2d28a5a617
Reviewed-on: https://go-review.googlesource.com/c/go/+/208778
Run-TryBot: Than McIntosh <thanm@google.com>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2019-12-02 19:05:01 +00:00
.github .github: don't render author-facing text in ISSUE_TEMPLATE 2018-11-02 04:47:34 +00:00
api unicode: upgrade to Unicode 12 2019-11-05 14:34:56 +00:00
doc doc: add section on resolving packages to module reference doc 2019-11-27 16:41:28 +00:00
lib/time lib/time: update tz data to 2019c 2019-11-26 12:03:08 +00:00
misc misc/cgo/testshared: do not write to GOROOT 2019-11-25 17:05:01 +00:00
src cmd/link: additional fixes for -newobj and "ld -r" ELF host objects 2019-12-02 19:05:01 +00:00
test cmd/compile: try harder to not use an empty src.XPos for a bogus line 2019-11-22 03:06:22 +00:00
.gitattributes
.gitignore .gitignore: ignore src/cmd/dist/dist 2017-10-28 21:55:49 +00:00
AUTHORS A+C: change email address for Akhil Indurti 2019-09-09 15:30:38 +00:00
CONTRIBUTING.md all: restore changes from faulty merge/revert 2018-02-12 20:13:59 +00:00
CONTRIBUTORS C: update email address for utkarsh-extc 2019-10-03 12:39:06 +00:00
favicon.ico website: recreate 16px and 32px favicon 2016-08-25 15:43:32 +00:00
LICENSE doc: revert copyright date to 2009 2016-06-01 22:40:04 +00:00
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SECURITY.md SECURITY.md: update go versions 2019-09-26 15:34:57 +00:00

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