Tharo
2c481eaeeb
* Partial linking of overlay segments, relax linker script alignment * Partial linking of all spec segments * Fix update, remove _RomPos from linker script * iQue version working pending COM-plugin update * Add plf map file resolution to sym_info.py, local symbol merging is broken * git subrepo pull tools/com-plugin subrepo: subdir: "tools/com-plugin" merged: "c4f3ba845" upstream: origin: "git@github.com:Thar0/com-plugin.git" branch: "main" commit: "c4f3ba845" git-subrepo: version: "0.4.6" origin: "https://github.com/ingydotnet/git-subrepo" commit: "110b9eb" * Make tools compatible with partial linking Co-authored-by: Anghelo Carvajal <angheloalf95@gmail.com> * Remove unused files * Fix some makefile bits * mkspecrules cleanup * Comment on the makerom linker layout in mkldscript * Revert linker padding strategy back to pad_text spec directives * Comment on objcopy elf -> rom step * Adjust tool descriptions * Fix compressed builds * rm reloc_prereq, no longer used * Makefile merge fix Co-authored-by: Dragorn421 <Dragorn421@users.noreply.github.com> --------- Co-authored-by: Anghelo Carvajal <angheloalf95@gmail.com> Co-authored-by: Dragorn421 <Dragorn421@users.noreply.github.com>
COMMON symbol ordering linker plugin
This repository contains a plugin for linkers that support the External Linker Plugin API that allows providing a manual specification for COMMON symbol ordering, intended to support matching decompilations that must reproduce an order for COMMON symbols whose names are unknown. Currently only 32-bit Big-Endian MIPS ELF object files are supported.
How it works
The plugin expects a symbol order txt file listing the COMMON symbols in order on each line. The plugin searches each input file for the symbol definitions for these and emits a new ELF file containing BSS definitions for each COMMON symbol found with the appropriate size and alignment. This ELF file is then added as an extra input file to the linker, overriding the COMMON definitions in the other input files.
Usage
Add -plugin common-plugin.so -plugin-opt order=bss_order.txt to the linker invocation, replacing bss_order.txt with an alternative path if desired.
An optional argument -plugin-opt min_align=N can specify the minimum alignment for the bss output files. If unset, the minimum alignment is 0: the resulting section alignment is equal to the minimum alignment required by the symbols.
Also add any bss output files mentioned in the order file to the linker script (e.g. bss.o would be added as *bss.o(.bss*)) so that the additional input file is not discarded, if required.
Symbol order file syntax
<ofile> {
<sym1>;
<sym2>;
<sym3>;
[...]
}
[...]
The order file supports 2 styles of single-line comments (// and #) and C-style multi-line comments and ignores whitespace.
Building
Run make to build common-plugin.so.