centaur.git - ELF executable file editing toolkit.

Age	Commit message (Collapse)	Author
2013-06-16	mv main.c -> elfucli.c, make it scriptable via argssymrel	norly

2013-06-16	Clean up main.c a bit	norly

2013-06-15	Factor out symbol table handling	norly

2013-06-15	Rename mRelocate	norly

2013-06-15	Basic x86-64 support, not very usable in practice	norly
	Turns out that x86-64 aligns LOAD segments to 0x200000 bytes. Given that the mapping starts at 0x400000, there is not much room to expand... so there will be a need to add additional LOAD headers.
2013-06-15	Merge symbol tables. (Not fully ELF conformant)	norly
	Also, remove that nameptr member from symbols. It just had to cause trouble. Symbols are simply appended to the target's symbol table, which means that LOCAL symbols are not inserted at the beginning and we are thus ignoring an ELF spec. Might change that in the future, it's good enough for now and it's sure not to break anything with the old symbols. The code currently assumes that the target has a symbol table. We'll have to fix that, and also remove undefined and duplicate symbols.
2013-06-15	Flatten symtab to file - gdb works, check breaks.	norly

2013-06-15	Make symtab and reltab resident in ElfuScn	norly

2013-06-15	Rename CLI to elfucli	norly

2013-06-12	Rename elfedit to centaur, model to modelops	norly

2013-06-03	Do not insert STRTAB sections explicitly	norly

2013-06-03	Insert NOBITS sections (.bss), ignore empty sections	norly

2013-06-03	Guess where unknown functions are in .rel.plt	norly

2013-06-03	Disable memory dump to screen	norly

2013-06-03	Basic 32-bit SYMTAB and REL (not RELA) support	norly

2013-06-03	Use pkg-config	norly

2013-06-03	Simplify includes	norly

2013-06-01	Insert section names (with fixed prefix)	norly
	Ideally, the filename of the original .o file being inserted would be used as a prefix for the sections copied over. However for now that prefix is simply "reladd".
2013-05-31	Auto-layout file after --reladd	norly

2013-05-31	Pull out existing re-layouting code	norly

2013-05-30	More rigorous sh_addr and sh_offset checking	norly

2013-05-30	Redesign data structures, make basic reladd work.newparser	norly
	The memory ELF model is now a tree structure: ELF +--> PHDRs +--> PHDR +--> Section \| \| +--> Section \| \| ... \| \| \--> Section \| \| \| +--> PHDR +--> Section \| \| ... \| ... \| \--> Orphaned sections +--> Section ... \--> Section This effectively introduces semantics into the binary blob we are editing, and allows us to re-layout its contents much more easily while keeping as close as possible to what is assumed to be the original semantics. As a side-effect, a first meta-function had to be introduced (elfu_mScnForall) in order to traverse all leaves of the tree. Much old code has been removed given the leaner environment available now, and automated insertion of .text and .data sections from object files into executables now works. However nothing else is inserted (such as string tables or .bss) and no relocation takes place yet.
2013-05-28	Implement orphaned sections	norly
	Orphaned sections are not (fully) included in any LOAD PHDR and can thus be moved and stripped at will without changing the memory image of the program.
2013-05-28	Remove old and ugly printing functions	norly

2013-05-28	Add printing functions for models to ease debugging	norly

2013-05-27	Find PHDR -> PHDR dependencies	norly

2013-05-27	Only establish PHDR->Scn relationship for PT_LOAD	norly

2013-05-27	Restrict sh_link/sh_info evaluation where possible	norly

2013-05-27	Abstract model more - break 'make check'	norly
	Sections are now sorted by file offset and sh_link dependencies between them as well as PHDR-SHDR dependencies are deduced as much as possible. The downside is that while the output should still work just fine, 'make check' fails to establish binary equivalence of input and output if the section table is reordered. Thankfully, in normal GCC binaries it is already ordered so we don't have to worry about this. Unfortunately the ELF spec is very lax in this regard so we have to draw a line ourselves.
2013-05-27	Turn elfu_gPhdrContainsScn into a macro	norly

2013-05-27	Turn elfu_gScnSizeFile into a macro	norly

2013-05-27	Clean up loader code	norly

2013-05-27	Validate input at libelf level	norly
	This way we can just assume that stuff works later on and keep the code clean and simple. It especially establishes that the file has a sane format and is thus understandable and editable.
2013-05-25	Be more verbose	norly

2013-05-25	Fix alignment error in mInsertSpaceBefore	norly

2013-05-24	Object file injection, first part	norly

2013-05-24	Move section-in-segment.c to generic/	norly

2013-05-24	Cleaner error handling with ELFU_WARN and ELFU_WARNELF	norly

2013-05-24	Use explicit libelf/* path in includes	norly

2013-03-24	Typos	norly

2013-03-22	Clean up file handling in main.c a bit	norly

2013-03-21	NOBITS expansion, for .bss etc	norly
	GNU binutils' readelf gets confused with symbol versions. More analysis needed on that.
2013-03-21	Copy section contents into newly allocated buffers	norly

2013-03-20	Typo	norly

2013-03-01	Implement mInsertAfter, for post-.data injection	norly

2013-02-27	Implement mInsertBefore, for pre-.interp injection	norly

2013-02-24	Add simple 'make check'	norly
	Uses elfedit to copy itself and ensure both versions are identical.
2013-02-23	Refactor mdoel-related code	norly

2013-02-23	Clean up ELF-related files and functions	norly

2013-02-23	Merge {first,last}-section-in-segment.c	norly