https://sourceware.org/bugzilla/show_bug.cgi?id=27708
Bug ID: 27708
Summary: strip mishandles padding between notes
Product: binutils
Version: unspecified
Status: NEW
Severity: normal
Priority: P2
Component: binutils
Assignee: unassigned at sourceware dot org
Reporter: vries at gcc dot gnu.org
Target Milestone: ---
Created attachment 13355
--> https://sourceware.org/bugzilla/attachment.cgi?id=13355&action=edit
gcore-tls-pie.gz
[ Spinoff of PR gdb/27689. ]
Consider exec gcore-tls-pie.
It contains a NOTE segment:
...
Program Headers:
Type Offset VirtAddr PhysAddr
FileSiz MemSiz Flags Align
...
NOTE 0x00000000000002c4 0x00000000000002c4 0x00000000000002c4
0x0000000000000078 0x0000000000000078 R 0x4
...
which contains the following sections:
...
06 .note.ABI-tag .note.gnu.property .note.gnu.build-id
...
After strip, the MemSiz has changed to 0x74:
...
NOTE 0x00000000000002c4 0x00000000000002c4 0x00000000000002c4
0x0000000000000078 0x0000000000000074 R 0x4
...
and consequently there's no room anymore for a full .note.gnu.build-id:
...
06 .note.ABI-tag .note.gnu.property
...
It looks like the size (0x74) is just computed using the combined sizes
(0x20+0x30+0x24):
...
Section Headers:
[Nr] Name Type Address Offset
Size EntSize Flags Link Info Align
...
[ 2] .note.ABI-tag NOTE 00000000000002c4 000002c4
0000000000000020 0000000000000000 A 0 0 4
[ 3] .note.gnu.pr[...] NOTE 00000000000002e8 000002e8
0000000000000030 0000000000000000 A 0 0 8
[ 4] .note.gnu.bu[...] NOTE 0000000000000318 00000318
0000000000000024 0000000000000000 A 0 0 4
[ 5] .dynsym DYNSYM 0000000000000340 00000340
...
without taking into account the padding between note.ABI-tag and
.note.gnu.property.
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