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ToDo list for elfutils -*-outline-*-
----------------------
Time-stamp: <2009-02-05 22:08:01 drepper>
* mkinstalldirs
Remove everywhere. Use mkdir -p.
* libelf:
** verify section
Currently the elf_update function trusts the user blindly if the
ELF_F_LAYOUT flag is set. This is OK if the data is prepared by a
ELF_C_NULL call but not if the user prepared the data herself
** break out archive handling from elf_begin
The handling of archives (especially of the symbol tables) must be
broken out of elf_begin. There are several different forms of
archives and only when having the archive handling separately this
remains maintainable.
** shdrs in read-only files
When reading (ELF_C_READ*) then there is no need to malloc Shdr
structure in elfXX_getshdr if file is mmaped and unaligned access
is allowed or the structure is aligned. Use ELF_F_MALLOCED flag
to differentiate.
** shdrs after elf_cntl (ELF_C_FDREAD)
Similar to the above. After ELF_C_FDREAD the file is completely
in memory. See also this mailing list thread:
https://fedorahosted.org/pipermail/elfutils-devel/2012-July/002368.html
* libdw
** More memory access checks needed
All accesses to the debug sections should make sure the offsets are
valid. This is currently especially a problem with leb128 accesses.
** Low level macro information operations
in 5.11.3 are not implemented. gcc currently does not emit this
information so I cannot test it.
** Rename dwarf_getabbrev
* libcpu
** x86
*** Opcodes
crc32
extractps
pextrb
pextrd/pextrq
pextrw
pinsrq
popcnt 64-bit reg
* nm:
** add demangler support
Use demangler from libiberty.
** add support to read debugging symbols
Implement -l option for BSD and POSIX format
* strip:
** support SHT_SYMTAB_SHNDX
should be removed if not needed anymore
* ld:
** sanity check .rel sh_info content
the sh_info of all .rel sections with the same name must point to
sections which also have the same name
** use ld.so.conf
to locate shared libraries also use /etc/ld.so.conf
** handle object files for different architectures
ld.so is expected to ignore object files for different architectures and
continue looking for a matching file (e.g., ignore 32-bit binaries on
64-bit platforms and vice versa). We probably need the same in ld.
** reuse after elf_end
Some files are closed using elf_end. They are removed from memory only
if no reference is left (especially for archives this is a problem).
The old mapping should be reused in that case. The problem is worse
for files which are not mapped read-only (archives again).
** size for STT_SECTION entries
The STT_SECTION entries have zero for the size but can easily get
the size of the section.
** .eh_frame_hdr
Not implemented at all in the moment except for recognition of the option
itself.
** variables with aliases in executables
When linking an executable with a references against a variable in a
DSO, create symbol table entries for all the aliases of the variable
in the DSO and create a relocation for one of them (a non-weak
definition)
* elflint
** additional checks
1st GOT entry == _DYNAMIC
check versioning info:
always BASE in verdef
sh_size/sh_entsize matches last offset != 0
check whether any relocation is for a merge-able section
check TLS relocation dependencies
Check content of .eh_frame_hdr, .eh_frame, .gcc_except_table
*** for x86
check that R_386_TLS_GD is followed by R_386_PLT32 for __tls_get_addr
** relax
prelink generated files
* elfcmp
** treat relocation sections special
Differences in the relocation sections can be ignored if all
the same symbols with the same targets are present and the order
of overlapping relocations doesn't change. There really never
should be overlapping relocations but who knows.
* mcs
Sun has it. Can modify sections which are not in segments.
-a string
Append string to the comment section of the ELF object
files. If string contains embedded blanks, it must be
enclosed in quotation marks.
-c Compress the contents of the comment section of the
ELF object files. All duplicate entries are removed.
The ordering of the remaining entries is not dis-
turbed.
-d Delete the contents of the comment section from the
ELF object files. The section header for the comment
section is also removed.
-n name
Specify the name of the comment section to access if
other than .comment. By default, mcs deals with the
section named .comment. This option can be used to
specify another section. mcs can take multiple -n
options to allow for specification of multiple sec-
tion comments.
-p Print the contents of the comment section on the stan-
dard output. Each section printed is tagged by the
name of the file from which it was extracted, using
the format file[member_name]: for archive files and
file: for other files.
-V Print on standard error the version number of mcs.
Local Variables:
eval:(hide-sublevels 3)
End:
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