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[Bug binutils/26448] UBSAN error: gas/symbols.c:1586:31:
From: |
cvs-commit at gcc dot gnu.org |
Subject: |
[Bug binutils/26448] UBSAN error: gas/symbols.c:1586:31: |
Date: |
Wed, 26 Aug 2020 13:54:47 +0000 |
https://sourceware.org/bugzilla/show_bug.cgi?id=26448
--- Comment #1 from cvs-commit at gcc dot gnu.org <cvs-commit at gcc dot
gnu.org> ---
The master branch has been updated by Alan Modra <amodra@sourceware.org>:
https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=d8d6da137d7ececcd0e10c575aa187bb8c9b24e0
commit d8d6da137d7ececcd0e10c575aa187bb8c9b24e0
Author: Alan Modra <amodra@gmail.com>
Date: Wed Aug 26 17:39:58 2020 +0930
PR26448 UBSAN: symbols.c:1586 left shift of negative value
Besides avoiding the UB, this also makes right shifts inside
expression symbols unsigned, consistent with the way gas evaluates
expressions in source.
PR 26448
* symbols.c: Include limits.h.
(resolve_symbol_value <O_left_shift, O_right_shift>): Do an
unsigned shift. Warn if shift count larger than valueT size.
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