[Bug libelf/24368] New: Add ELF_F_LAYOUT_OVERLAP
mark at klomp dot org
Wed Mar 20 22:04:00 GMT 2019
Bug ID: 24368
Summary: Add ELF_F_LAYOUT_OVERLAP
Assignee: unassigned at sourceware dot org
Reporter: mark at klomp dot org
CC: elfutils-devel at sourceware dot org
Target Milestone: ---
Originally reported in bugzilla.redhat.com.
The mr511.de libelf provided ELF_F_LAYOUT_OVERLAP:
* Allow sections to overlap when ELF_F_LAYOUT is in effect.
* Note that this flag ist NOT portable, and that it may render
* the output file unusable. Use with extreme caution!
ELF_F_LAYOUT_OVERLAP = 0x10000000
#define ELF_F_LAYOUT_OVERLAP ELF_F_LAYOUT_OVERLAP
Should elfutils libelf also support this?
In the original bug report Petr Machata said:
The ELF standard claims that "sections in a file may not overlap. No byte in a
file resides in more than one section". libelf in elfutils currently
disregards this directive, and when you pass ELF_F_LAYOUT, it is possible to
create a file with overlapping sections. I believe it is worthwhile to
implement checks for this. It would then make sense to relax this restriction
by providing ELF_F_LAYOUT_OVERLAP.
Mark Wielaard said:
We do already have the (non-standard, non-documented) ELF_F_PERMISSIVE, which
could maybe be used for the same issue?
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