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substituted tool to obtain target structure offsets (for asm)

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This commit is contained in:
kub 2019-03-22 20:17:08 +01:00
parent 2fa02d5a63
commit 122afd9d37
4 changed files with 89 additions and 37 deletions
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7
tools/Makefile
View file

@ -1,13 +1,10 @@
CFLAGS = -Wall -ggdb
TARGETS = amalgamate textfilter mkoffsets
TARGETS = amalgamate textfilter
OBJS = $(addsuffix .o,$(TARGETS))
all: $(TARGETS)
CC="$(XCC)" CFLAGS="$(XCFLAGS)" ./mkoffsets.sh ../pico
clean:
$(RM) $(TARGETS) $(OBJS)
mkoffsets: CFLAGS += -m32 -I..
.PHONY: clean all

82
tools/mkoffsets.sh Executable file
View file

@ -0,0 +1,82 @@
# usage: mkoffsets <output dir>
# automatically compute structure offsets for gcc targets in ELF format
CC=${CC:-gcc}
# endianess of target (automagically determined below)
ENDIAN=
compile_rodata ()
{
$CC $CFLAGS -I .. -c /tmp/getoffs.c -o /tmp/getoffs.o || exit 1
rosect=$(readelf -S /tmp/getoffs.o | grep '\.rodata' |
sed 's/^[^.]*././;s/ .*//')
objcopy --dump-section $rosect=/tmp/getoffs.ro /tmp/getoffs.o || exit 1
ro=$(xxd -ps /tmp/getoffs.ro)
if [ "$ENDIAN" = "le" ]; then
# swap needed for le target
hex=""
for b in $(echo $ro | sed 's/\([0-9a-f]\{2\}\)/\1 /g'); do
hex=$b$hex;
done
else
hex=$ro
fi
rodata=$(printf "%d" 0x$hex)
}
get_define () # prefix struct member member...
{
prefix=$1; shift
struct=$1; shift
field=$(echo $* | sed 's/ /./g')
name=$(echo $* | sed 's/ /_/g')
echo '#include "pico/pico_int.h"' > /tmp/getoffs.c
echo "static const struct $struct p;" >> /tmp/getoffs.c
echo "const int offs = (char *)&p.$field - (char*)&p;" >>/tmp/getoffs.c
compile_rodata
line=$(printf "#define %-20s 0x%04x" $prefix$name $rodata)
}
# determine endianess
echo "const int one = 1;" >/tmp/getoffs.c
compile_rodata
ENDIAN=$(if [ "$rodata" -eq 1 ]; then echo be; else echo le; fi)
# determine output file
echo "const int vsz = sizeof(void *);" >/tmp/getoffs.c
compile_rodata
fn="${1:-.}/pico_int_o$((8*$rodata)).h"
# output header
echo "/* autogenerated by mkoffset.sh, do not edit */" >$fn
echo "/* target endianess: $ENDIAN, compiled with: $CC $CFLAGS */" >>$fn
# output offsets
get_define OFS_Pico_ Pico video reg ; echo "$line" >>$fn
get_define OFS_Pico_ Pico m rotate ; echo "$line" >>$fn
get_define OFS_Pico_ Pico m z80Run ; echo "$line" >>$fn
get_define OFS_Pico_ Pico m dirtyPal ; echo "$line" >>$fn
get_define OFS_Pico_ Pico m hardware ; echo "$line" >>$fn
get_define OFS_Pico_ Pico m z80_reset ; echo "$line" >>$fn
get_define OFS_Pico_ Pico m sram_reg ; echo "$line" >>$fn
get_define OFS_Pico_ Pico sv ; echo "$line" >>$fn
get_define OFS_Pico_ Pico sv data ; echo "$line" >>$fn
get_define OFS_Pico_ Pico sv start ; echo "$line" >>$fn
get_define OFS_Pico_ Pico sv end ; echo "$line" >>$fn
get_define OFS_Pico_ Pico sv flags ; echo "$line" >>$fn
get_define OFS_Pico_ Pico rom ; echo "$line" >>$fn
get_define OFS_Pico_ Pico romsize ; echo "$line" >>$fn
get_define OFS_Pico_ Pico est ; echo "$line" >>$fn
get_define OFS_EST_ PicoEState DrawScanline ; echo "$line" >>$fn
get_define OFS_EST_ PicoEState rendstatus ; echo "$line" >>$fn
get_define OFS_EST_ PicoEState DrawLineDest ; echo "$line" >>$fn
get_define OFS_EST_ PicoEState HighCol ; echo "$line" >>$fn
get_define OFS_EST_ PicoEState HighPreSpr ; echo "$line" >>$fn
get_define OFS_EST_ PicoEState Pico ; echo "$line" >>$fn
get_define OFS_EST_ PicoEState PicoMem_vram ; echo "$line" >>$fn
get_define OFS_EST_ PicoEState PicoMem_cram ; echo "$line" >>$fn
get_define OFS_EST_ PicoEState PicoOpt ; echo "$line" >>$fn
get_define OFS_EST_ PicoEState Draw2FB ; echo "$line" >>$fn
get_define OFS_EST_ PicoEState HighPal ; echo "$line" >>$fn
get_define OFS_PMEM_ PicoMem vram ; echo "$line" >>$fn
get_define OFS_PMEM_ PicoMem vsram ; echo "$line" >>$fn