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libretro, build fixes

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This commit is contained in:
kub 2020-07-09 23:51:39 +02:00
parent b1ccc27109
commit 03718e6276
5 changed files with 71 additions and 19 deletions
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2
tools/Makefile
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@ -2,7 +2,7 @@ TARGETS = amalgamate textfilter
OBJS = $(addsuffix .o,$(TARGETS))
all: $(TARGETS)
CC="$(XCC)" CFLAGS="$(XCFLAGS)" ./mkoffsets.sh ../pico
CC="$(XCC)" CFLAGS="$(XCFLAGS)" sh ./mkoffsets.sh ../pico
clean:
$(RM) $(TARGETS) $(OBJS)

79
tools/mkoffsets.sh
View file

@ -8,30 +8,80 @@ CC=${CC:-gcc}
# endianess of target (automagically determined below)
ENDIAN=
# don't do this if ELF format isn't used. it doesn't matter since offsets are
# only needed for the asm parts (currently mips/arm32) and those have ELF
check_elf ()
# check which object format to dissect
READELF=
OBJDUMP=
check_obj ()
{
# prepare an object file; as side effect dtermine the endianess
CROSS=$(echo $CC | sed 's/gcc.*//')
echo '#include <stdint.h>' >/tmp/getoffs.c
echo "const int32_t val = 1;" >>/tmp/getoffs.c
$CC $CFLAGS -I .. -c /tmp/getoffs.c -o /tmp/getoffs.o || exit 1
if ! command -v readelf >/dev/null || ! file /tmp/getoffs.o | grep -q ELF; then
echo "/* mkoffset.sh: no readelf or not ELF, offset table not created */" >$fn
echo "WARNING: no readelf or not ELF, offset table not created"
exit
# check for readelf; readelf is the only toolchain tool not using bfd,
# hence it works with ELF files for every target
if file /tmp/getoffs.o | grep -q ELF; then
if command -v readelf >/dev/null; then
READELF=readelf
elif command -v ${CROSS}readelf >/dev/null; then
READELF=${CROSS}readelf
fi
fi
if [ -n "$READELF" ]; then
# find the the .rodata section (in case -fdata-sections is used)
rosect=$($READELF -S /tmp/getoffs.o | grep '\.rodata\|\.sdata' |
sed 's/^[^.]*././;s/ .*//')
# read .rodata section as hex string (should be only 4 bytes)
ro=$($READELF -x $rosect /tmp/getoffs.o | grep '0x' | cut -c14-48 |
tr -d ' \n' | cut -c1-8)
# if no output could be read readelf isn't working
if [ -z "$ro" ]; then
READELF=
fi
fi
# if there is no working readelf try using objdump
if [ -z "$READELF" ]; then
# objdump is using bfd; try using the toolchain objdump first
# since this is likely working with the toolchain objects
if command -v ${CROSS}objdump >/dev/null; then
OBJDUMP=${CROSS}objdump
elif command -v objdump >/dev/null; then
OBJDUMP=objdump
fi
# find the start line of the .rodata section; read the next line
ro=$($OBJDUMP -s /tmp/getoffs.o | awk '\
/Contents of section.*(__const|.rodata|.sdata)/ {o=1; next} \
{if(o) { gsub(/ .*/,""); $1=""; gsub(/ /,""); print; o=0}}')
# no working tool for extracting the ro data; stop here
if [ -z "$ro" ]; then
echo "/* mkoffset.sh: no readelf or not ELF, offset table not created */" >$fn
echo "WARNING: no readelf or not ELF, offset table not created"
exit
fi
fi
# extract decimal value from ro
rodata=$(printf "%d" 0x$ro)
ENDIAN=$(if [ "$rodata" -eq 1 ]; then echo be; else echo le; fi)
}
# compile with target C compiler and extract value from .rodata section
compile_rodata ()
{
$CC $CFLAGS -I .. -c /tmp/getoffs.c -o /tmp/getoffs.o || exit 1
# find the name of the .rodata section (in case -fdata-sections is used)
rosect=$(readelf -S /tmp/getoffs.o | grep '\.rodata\|\.sdata' |
if [ -n "$READELF" ]; then
# find the .rodata section (in case -fdata-sections is used)
rosect=$(readelf -S /tmp/getoffs.o | grep '\.rodata\|\.sdata' |
sed 's/^[^.]*././;s/ .*//')
# read out .rodata section as hex string (should be only 4 bytes)
ro=$(readelf -x $rosect /tmp/getoffs.o | grep '0x' | cut -c14-48 |
# read .rodata section as hex string (should be only 4 bytes)
ro=$(readelf -x $rosect /tmp/getoffs.o | grep '0x' | cut -c14-48 |
tr -d ' \n' | cut -c1-8)
elif [ -n "$OBJDUMP" ]; then
# find the start line of the .rodata section; read the next line
ro=$($OBJDUMP -s /tmp/getoffs.o | awk '\
/Contents of section.*(__const|.rodata|.sdata)/ {o=1; next} \
{if(o) { gsub(/ .*/,""); $1=""; gsub(/ /,""); print; o=0}}')
fi
if [ "$ENDIAN" = "le" ]; then
# swap needed for le target
hex=""
@ -63,12 +113,7 @@ get_define () # prefix struct member member...
fn="${1:-.}/pico_int_offs.h"
if echo $CFLAGS | grep -qe -flto; then CFLAGS="$CFLAGS -fno-lto"; fi
check_elf
# determine endianess
echo '#include <stdint.h>' >/tmp/getoffs.c
echo "const int32_t val = 1;" >>/tmp/getoffs.c
compile_rodata
ENDIAN=$(if [ "$rodata" -eq 1 ]; then echo be; else echo le; fi)
check_obj
# output header
echo "/* autogenerated by mkoffset.sh, do not edit */" >$fn
echo "/* target endianess: $ENDIAN, compiled with: $CC $CFLAGS */" >>$fn