Bug 26445

Summary: UBSAN error: bfd/elf32-csky.c:3916:18:
Product: binutils Reporter: Martin Liska <mliska>
Component: binutilsAssignee: Alan Modra <amodra>
Severity: normal    
Priority: P2    
Version: 2.34   
Target Milestone: 2.36   
Host: Target:
Build: Last reconfirmed: 2020-08-31 00:00:00

Description Martin Liska 2020-08-20 12:22:05 UTC
The following fails when I build binutils with:
configure --build=x86_64-linux --disable-nls --disable-gdb --disable-gdbserver --disable-sim --disable-readline --disable-libdecnumber --enable-obsolete --target=csky-elf CFLAGS="-g -O2 -fsanitize=address,undefined -Wno-error" CXXLAGS="-g -O2 -fsanitize=address,undefined -Wno-error" LDFLAGS="-ldl"
Target: csky-elf
PASS: Build eh-group1.o
Executing on host: sh -c {./ld-new   -o tmpdir/eh-group -e _start tmpdir/eh-group.o 2>&1}  /dev/null ld.tmp (timeout = 300)
/home/mliska/Programming/binutils/bfd/elf32-csky.c:3916:18: runtime error: left shift of negative value -44
Comment 1 cvs-commit@gcc.gnu.org 2020-08-31 10:59:17 UTC
The master branch has been updated by Alan Modra <amodra@sourceware.org>:


commit f2173852cff1459b04db4d84debbbf8961d6e23e
Author: Alan Modra <amodra@gmail.com>
Date:   Mon Aug 31 09:50:49 2020 +0930

    PR26445 UBSAN: elf32-csky.c:4115 left shift of negative value
            PR 26445
            * elf32-csky.c (csky_relocate_contents): Make relocation a bfd_vma,
            and similarly for variables dealing with overflow.
Comment 2 Alan Modra 2020-08-31 11:01:27 UTC