https://bugs.llvm.org/show_bug.cgi?id=43181
Bug ID: 43181
Summary: Add ability to set section alignment for binary input
Product: tools
Version: trunk
Hardware: PC
OS: Windows NT
Status: NEW
Severity: enhancement
Priority: P
Component: llvm-objcopy/strip
Assignee: unassignedb...@nondot.org
Reporter: jh7370.2...@my.bristol.ac.uk
CC: alexander.v.shaposhni...@gmail.com,
jake.h.ehrl...@gmail.com,
jh7370.2...@my.bristol.ac.uk,
llvm-bugs@lists.llvm.org, ruppre...@google.com
Our Sony proprietary tool has the ability to specify the alignment of the .data
section when creating an object file from binary input. This is useful if the
data being embedded should be e.g. word aligned. Neither GNU nor llvm-objcopy
to my knowledge have the ability to set the section alignment of a section. For
binary input, this means it always has an alignment of 1.
We could add a switch that affects only binary input, but I think it would make
more sense to have a generic switch of the form "--section-alignment=<section
name (or index?)>=<alignment>". This would work with binary input by simply
specifying the .data section:
llvm-objcopy -I binary -B i386:x86-64 --section-alignment=.data=0x10 foo.bin
foo.o
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