mirror of
https://github.com/RaySollium99/picodrive.git
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160 lines
6.2 KiB
Bash
Executable file
160 lines
6.2 KiB
Bash
Executable file
# automatically compute structure offsets for gcc targets in ELF format
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# (C) 2018 Kai-Uwe Bloem. This work is placed in the public domain.
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#
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# usage: mkoffsets <output dir>
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CC=${CC:-gcc}
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# endianess of target (automagically determined below)
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ENDIAN=
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# check which object format to dissect
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READELF=
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OBJDUMP=
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check_obj ()
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{
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# prepare an object file; as side effect dtermine the endianess
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CROSS=$(echo $CC | sed 's/gcc.*//')
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echo '#include <stdint.h>' >/tmp/getoffs.c
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echo "const int32_t val = 1;" >>/tmp/getoffs.c
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$CC $CFLAGS -I .. -c /tmp/getoffs.c -o /tmp/getoffs.o || exit 1
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# check for readelf; readelf is the only toolchain tool not using bfd,
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# hence it works with ELF files for every target
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if file /tmp/getoffs.o | grep -q ELF; then
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if command -v readelf >/dev/null; then
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READELF=readelf
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elif command -v ${CROSS}readelf >/dev/null; then
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READELF=${CROSS}readelf
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fi
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fi
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if [ -n "$READELF" ]; then
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# find the the .rodata section (in case -fdata-sections is used)
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rosect=$($READELF -S /tmp/getoffs.o | grep '\.rodata\|\.sdata' |
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sed 's/^[^.]*././;s/ .*//')
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# read .rodata section as hex string (should be only 4 bytes)
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ro=$($READELF -x $rosect /tmp/getoffs.o | grep '0x' | cut -c14-48 |
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tr -d ' \n' | cut -c1-8)
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# if no output could be read readelf isn't working
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if [ -z "$ro" ]; then
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READELF=
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fi
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fi
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# if there is no working readelf try using objdump
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if [ -z "$READELF" ]; then
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# objdump is using bfd; try using the toolchain objdump first
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# since this is likely working with the toolchain objects
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if command -v ${CROSS}objdump >/dev/null; then
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OBJDUMP=${CROSS}objdump
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elif command -v objdump >/dev/null; then
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OBJDUMP=objdump
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fi
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# find the start line of the .rodata section; read the next line
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ro=$($OBJDUMP -s /tmp/getoffs.o | awk '\
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/Contents of section.*(__const|.rodata|.sdata)/ {o=1; next} \
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{if(o) { gsub(/ .*/,""); $1=""; gsub(/ /,""); print; o=0}}')
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# no working tool for extracting the ro data; stop here
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if [ -z "$ro" ]; then
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echo "/* mkoffset.sh: no readelf or not ELF, offset table not created */" >$fn
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echo "WARNING: no readelf or not ELF, offset table not created"
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exit
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fi
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fi
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# extract decimal value from ro
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rodata=$(printf "%d" 0x$ro)
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ENDIAN=$(if [ "$rodata" -eq 1 ]; then echo be; else echo le; fi)
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}
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# compile with target C compiler and extract value from .rodata section
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compile_rodata ()
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{
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$CC $CFLAGS -I .. -c /tmp/getoffs.c -o /tmp/getoffs.o || exit 1
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if [ -n "$READELF" ]; then
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# find the .rodata section (in case -fdata-sections is used)
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rosect=$(readelf -S /tmp/getoffs.o | grep '\.rodata\|\.sdata' |
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sed 's/^[^.]*././;s/ .*//')
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# read .rodata section as hex string (should be only 4 bytes)
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ro=$(readelf -x $rosect /tmp/getoffs.o | grep '0x' | cut -c14-48 |
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tr -d ' \n' | cut -c1-8)
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elif [ -n "$OBJDUMP" ]; then
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# find the start line of the .rodata section; read the next line
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ro=$($OBJDUMP -s /tmp/getoffs.o | awk '\
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/Contents of section.*(__const|.rodata|.sdata)/ {o=1; next} \
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{if(o) { gsub(/ .*/,""); $1=""; gsub(/ /,""); print; o=0}}')
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fi
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if [ "$ENDIAN" = "le" ]; then
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# swap needed for le target
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hex=""
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for b in $(echo $ro | sed 's/\([0-9a-f]\{2\}\)/\1 /g'); do
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hex=$b$hex;
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done
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else
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hex=$ro
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fi
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# extract decimal value from hex string
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rodata=$(printf "%d" 0x$hex)
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}
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# determine member offset and create #define
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get_define () # prefix struct member member...
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{
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prefix=$1; shift
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struct=$1; shift
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field=$(echo $* | sed 's/ /./g')
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name=$(echo $* | sed 's/ /_/g')
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echo '#include <stdint.h>' > /tmp/getoffs.c
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echo '#include "pico/pico_int.h"' >> /tmp/getoffs.c
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echo "static const struct $struct p;" >> /tmp/getoffs.c
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echo "const int32_t val = (char *)&p.$field - (char*)&p;" >>/tmp/getoffs.c
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compile_rodata
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line=$(printf "#define %-20s 0x%04x" $prefix$name $rodata)
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}
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fn="${1:-.}/pico_int_offs.h"
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if echo $CFLAGS | grep -qe -flto; then CFLAGS="$CFLAGS -fno-lto"; fi
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check_obj
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# output header
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echo "/* autogenerated by mkoffset.sh, do not edit */" >$fn
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echo "/* target endianess: $ENDIAN, compiled with: $CC $CFLAGS */" >>$fn
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# output offsets
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get_define OFS_Pico_ Pico video reg ; echo "$line" >>$fn
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get_define OFS_Pico_ Pico m rotate ; echo "$line" >>$fn
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get_define OFS_Pico_ Pico m z80Run ; echo "$line" >>$fn
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get_define OFS_Pico_ Pico m dirtyPal ; echo "$line" >>$fn
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get_define OFS_Pico_ Pico m hardware ; echo "$line" >>$fn
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get_define OFS_Pico_ Pico m z80_reset ; echo "$line" >>$fn
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get_define OFS_Pico_ Pico m sram_reg ; echo "$line" >>$fn
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get_define OFS_Pico_ Pico sv ; echo "$line" >>$fn
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get_define OFS_Pico_ Pico sv data ; echo "$line" >>$fn
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get_define OFS_Pico_ Pico sv start ; echo "$line" >>$fn
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get_define OFS_Pico_ Pico sv end ; echo "$line" >>$fn
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get_define OFS_Pico_ Pico sv flags ; echo "$line" >>$fn
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get_define OFS_Pico_ Pico rom ; echo "$line" >>$fn
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get_define OFS_Pico_ Pico romsize ; echo "$line" >>$fn
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get_define OFS_Pico_ Pico est ; echo "$line" >>$fn
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get_define OFS_EST_ PicoEState DrawScanline ; echo "$line" >>$fn
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get_define OFS_EST_ PicoEState rendstatus ; echo "$line" >>$fn
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get_define OFS_EST_ PicoEState DrawLineDest ; echo "$line" >>$fn
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get_define OFS_EST_ PicoEState HighCol ; echo "$line" >>$fn
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get_define OFS_EST_ PicoEState HighPreSpr ; echo "$line" >>$fn
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get_define OFS_EST_ PicoEState Pico ; echo "$line" >>$fn
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get_define OFS_EST_ PicoEState PicoMem_vram ; echo "$line" >>$fn
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get_define OFS_EST_ PicoEState PicoMem_cram ; echo "$line" >>$fn
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get_define OFS_EST_ PicoEState PicoOpt ; echo "$line" >>$fn
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get_define OFS_EST_ PicoEState Draw2FB ; echo "$line" >>$fn
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get_define OFS_EST_ PicoEState HighPal ; echo "$line" >>$fn
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get_define OFS_PMEM_ PicoMem vram ; echo "$line" >>$fn
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get_define OFS_PMEM_ PicoMem vsram ; echo "$line" >>$fn
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get_define OFS_PMEM32x_ Pico32xMem pal_native ; echo "$line" >>$fn
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get_define OFS_SH2_ SH2_ is_slave ; echo "$line" >>$fn
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get_define OFS_SH2_ SH2_ p_bios ; echo "$line" >>$fn
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get_define OFS_SH2_ SH2_ p_da ; echo "$line" >>$fn
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get_define OFS_SH2_ SH2_ p_sdram ; echo "$line" >>$fn
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get_define OFS_SH2_ SH2_ p_rom ; echo "$line" >>$fn
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get_define OFS_SH2_ SH2_ p_dram ; echo "$line" >>$fn
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get_define OFS_SH2_ SH2_ p_drcblk_da ; echo "$line" >>$fn
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get_define OFS_SH2_ SH2_ p_drcblk_ram ; echo "$line" >>$fn
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