mirror of
https://github.com/odiecay/chronicle-ps4.git
synced 2026-10-17 13:01:16 +02:00
Dylan Carr
c318048d7d
* Build: check out scripts with LF line endings * Build: replace the build scripts with Kazarov * Port: rename PC_OVERRIDE to Kazarov's PORT_OVERRIDE * Build: build the PS2 executables through Kazarov's CMake modules * Scripts: remove unused tooling * Build: update Kazarov * Build: update Kazarov * Build: run the port without a disc when its data exists, reject the old REGION variable, and lock the shared Windows dependencies * Build: update Kazarov * Port: serialise game data extraction across configurations * Build: update Kazarov * Port: hold a shared data lock while the game runs * Port: refuse to start on data another configuration re-extracted * Build: update Kazarov
78 lines
3.9 KiB
Bash
Executable File
78 lines
3.9 KiB
Bash
Executable File
#!/bin/sh
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# Prepare an object for MWLD, in a single objcopy pass.
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#
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# 1. Strips zero-sized .text/.data/.bss. GNU-lineage assemblers always emit
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# those section headers even when a source file never puts anything in
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# them, and MWLD errors on any zero-sized input section.
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# 2. Localizes the `.L…` branch labels. A label whose address is taken has to
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# stay global so a reference from another function can still resolve, but
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# that leaves each one a global text symbol -- and objdiff counts every
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# global text symbol in an object as a function, so `main`'s reference
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# object came out as 26 functions rather than one and scored accordingly.
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# Localizing keeps the symbol, and its address, without it being mistaken
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# for a function. The linked section dumps carry no such label, so this only
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# ever touches the per-function objects objdiff compares against.
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# 3. Renames the templated symbols back to the spelling MWCC emits, but only
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# for the per-function objects under ps2/asm/<region>/{non,}matchings --
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# the ones objdiff compares against, which nothing links. objdiff pairs a target with a base
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# by symbol name, and `__ct__14CDataAlloc2_1_Fv` in the dump never matched
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# the `__ct__14CDataAlloc2<1>Fv` the compiler produces. The linked objects
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# keep the sanitised name, which is what the rest of the build uses.
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# 4. Applies any extra objcopy arguments given after the object. Two callers
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# use that: an overlay's objects get their sections renamed onto the
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# overlay's private prefix (see tools/kazarov/cmake/KazarovOverlays.cmake), and the library
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# translation units get .text dropped to 4-byte alignment.
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#
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# The alignment matters because MWCC gives every function's .text 16-byte
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# alignment, and a unit compiled as one object has one such section per
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# function. The game's own code is 16-aligned in retail too, so that is
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# exactly right for it. The libraries are not -- 305 of their 739 functions
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# start 8 bytes off a 16-byte boundary -- and padding each one up grew the
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# image by 0xBA0 and moved everything after it.
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#
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# This runs once per object -- roughly four thousand times for a full build --
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# so it stays at two processes: one readelf, one objcopy.
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# The binutils-mips-ps2-decompals tools. Override MIPS_TOOL_PREFIX in the
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# environment for a differently-named build of them.
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: "${MIPS_TOOL_PREFIX:=mips-ps2-decompals-}"
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obj="$1"
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shift
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# Both of the objdiff fixups below apply to the per-function reference objects
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# only. Nothing links those. The compiled objects must keep their `.L…` labels
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# global and their names sanitised: a transplanted function can branch to a
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# label another object defines -- 37 of them do -- and localizing the
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# definition breaks the link.
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refonly=""
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case "$obj" in
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*/ps2/asm/*/nonmatchings/*|*/ps2/asm/*/matchings/*)
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refonly="-w --localize-symbol=.L*"
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# The build directory the object sits in: <build>/ps2/asm/<region>/...
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aliases="${obj%%/ps2/asm/*}/symbol_aliases.txt"
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[ -f "$aliases" ] &&
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refonly="$refonly --redefine-syms=$aliases"
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;;
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esac
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remove=$("${MIPS_TOOL_PREFIX}readelf" -SW "$obj" | awk '
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{ sub(/^ *\[[ 0-9]+\] +/, "") }
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($1 == ".text" || $1 == ".data" || $1 == ".bss") && $5 ~ /^0+$/ {
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printf "--remove-section=%s ", $1
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}')
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# 5. Restores the functions MWCC marked for the linker to keep one copy of.
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# Their symbols are global in what the compiler wrote, but it places them
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# among the locals, and every objcopy pass rebuilds the table from sh_info
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# and demotes them. A local one is a second definition MWLD lays out in
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# full, which costs the image a copy of every constructor the compiler
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# wrote itself. postprocess_object.py leaves the names beside the object.
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coal=""
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[ -s "$obj.coal" ] && coal="--globalize-symbols=$obj.coal"
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if [ -n "$remove" ] || [ -n "$refonly" ] || [ -n "$coal" ] || [ "$#" -gt 0 ]; then
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"${MIPS_TOOL_PREFIX}objcopy" -I elf32-littlemips -O elf32-littlemips \
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$refonly $remove $coal "$@" "$obj"
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fi
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