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The permission macros are not guaranteed to be defined and the octal
numbers are rather well known.
Change-Id: I90ea2f98013f963857946a2f150a4a7114ca2b9a
Reviewed-by: Christian Kandeler <[email protected]>
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If O_BINARY is not defined, define it to 0, so that the change has no
effect then. Some systems have separate binary and text modes for files,
and we don't want the text mode to be used.
Change-Id: If7efb5bd448c2a1c7d1eb5dab276849b1b15a3ce
Reviewed-by: Christian Kandeler <[email protected]>
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If fchmod or fchown are unavailable, then the file permission model is
likely to be different from what we expect there. posix_fallocate is a
rather fragile affair already on linux, and not guaranteed to do
anything useful. If it's not available, the result will be the same as
when it's available and unreliable. fadvise is an optimization.
Change-Id: I28a77e976a0198cf80397b45eb1bc8cfb30664f5
Reviewed-by: Christian Kandeler <[email protected]>
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mempcpy, memrchr, rawmemchr, and argp are provided by gnulib now. We
don't need to define them locally and we don't need to search for an
external libargp.
Change-Id: I131ca4bc2d77c597b99c296c28259a3600e5d1b5
Reviewed-by: Christian Kandeler <[email protected]>
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If it doesn't exist, provide a definition based on memcpy.
Signed-off-by: Ulf Hermann <[email protected]>
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Move the strtab functions from libebl to libdw. Programs often want to
create ELF/DWARF string tables. We don't want (static) linking against
ebl since those are internal functions that might change.
This introduces dwelf_strtab_init, dwelf_strtab_add,
dwelf_strtab_add_len, dwelf_strtab_finalize, dwelf_strent_off,
dwelf_strent_str and dwelf_strtab_free. Documentation for each has
been added to libdwelf.h. The add fucntion got a variant that takes
the length explicitly and finalize was changed to return NULL on
out of memory instead of aborting. All code and tests now uses the
new functions.
Signed-off-by: Mark Wielaard <[email protected]>
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Old linkers might have created an STT_SECTION symbol for the section
header string table section, which isn't actually used. For now just
warn about such symbols. If such a symbol would actually really be used
(but why?) then we would have to handle it by removing it and rewriting
the symbol table.
This is a testsuite only change, but includes an extra test with files
that have such STT_SECTION symbols to make sure it will be handled in
case we "upgrade" the elfstrmerge test to a real utility.
Signed-off-by: Mark Wielaard <[email protected]>
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ELF files can share the section header string table (e_shstrndx) with
the symtab .strtab section. That might in some cases save a bit of space
since symbols and sections might share some (sub)strings. To handle that
eu-strip just needs to not unconditionally remove the .shstrtab section
(it will be properly marked as used/unused as needed). eu-unstrip needs
to make sure the section names are added to the strtab if it decides to
rewrite that section. Also makes sure that eu-strip won't move around
a SHT_NOBITS section that has SHF_ALLOC set. Although it is allowed to
move such sections around, there is no benefit. And some tools might
expect no allocated section to move around, not even a nobits section.
It also makes it harder to do "roundtripping" sanity checks that make
sure splitting a file with eu-strip and then reconstructed with eu-unstrip
produce the same ELF file (as is done in the new run-strip-strmerge.sh).
Introduces a somewhat large test generator elfstrmerge.c that will
hopefully turn into a more generic string table merger program.
Signed-off-by: Mark Wielaard <[email protected]>
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