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