https://sourceware.org/bugzilla/show_bug.cgi?id=26428
Bug ID: 26428
Summary: BFD linker creates compressed sections with 1 byte
alignment
Product: binutils
Version: 2.36 (HEAD)
Status: NEW
Severity: normal
Priority: P2
Component: ld
Assignee: unassigned at sourceware dot org
Reporter: nickc at redhat dot com
Target Milestone: ---
The BFD linker will create compressed debug sections with 1 byte alignment.
This is despite the fact that these sections start with a chdr structure that
needs 4-byte or 8-byte alignment. (For the 32-bit and 64-bit versions of the
structure respectively).
For example:
$ echo 'int main(int argc, char **argv) { return 0; }' | gcc -c -o ex.o -g
-gz=zlib -x c -
$ ld -o ex --compress-debug-sections=zlib ex.o
$ readelf -N --wide ex
Section Headers:
[Nr] Name
Type Address Off Size ES Lk Inf Al
Flags
[...]
[ 5] .debug_info
PROGBITS 0000000000000000 002206 00006f 00 0 0 1
[0000000000000800]: COMPRESSED
ZLIB, 0000000000000085, 1
[...]
This causes problems for other tools which expect the proper alignment.
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