5608fd23c2
1. 50+% of NO_PIE use is fixed by adding -fPIC to INTERNALLIB and other build-only utility libraries. 2. Another 40% is fixed by generating _pic.a variants of various libraries. 3. Some of the NO_PIE use is a bit absurd as it is disabling PIE (and ASLR) where it never would work anyhow, such as csu or loader. This suggests there may be better ways of adding support to the tree. Many of these cases can be fixed such that -fPIE will work but there is really no reason to have it in those cases. 4. Some of the uses are working around hacks done to some Makefiles that are really building libraries but have been using bsd.prog.mk because the code is cleaner. Had they been using bsd.lib.mk then NO_PIE would not have been needed. We likely do want to enable PIE by default (opt-out) for non-tree consumers (such as ports). For in-tree though we probably want to only enable PIE (opt-in) for common attack targets such as remote service daemons and setuid utilities. This is also a great performance compromise since ASLR is expected to reduce performance. As such it does not make sense to enable it in all utilities such as ls(1) that have little benefit to having it enabled. Reported by: kib
118 lines
2.8 KiB
Makefile
118 lines
2.8 KiB
Makefile
# $FreeBSD$
|
|
|
|
.include <bsd.own.mk>
|
|
|
|
# XXX: clang can compile the boot code just fine, but boot2 gets too big
|
|
#CC:= gcc
|
|
#COMPILER_TYPE:= gcc
|
|
|
|
FILES= boot boot1 boot2
|
|
|
|
NM?= nm
|
|
|
|
BOOT_COMCONSOLE_PORT?= 0x238
|
|
BOOT_COMCONSOLE_SPEED?= 9600
|
|
B2SIOFMT?= 0x3
|
|
|
|
REL1= 0x700
|
|
ORG1= 0
|
|
ORG2= 0x2000
|
|
|
|
# Decide level of UFS support.
|
|
BOOT2_UFS?= UFS1_AND_UFS2
|
|
#BOOT2_UFS?= UFS2_ONLY
|
|
#BOOT2_UFS?= UFS1_ONLY
|
|
|
|
CFLAGS= -Os \
|
|
-fomit-frame-pointer \
|
|
-mrtd \
|
|
-mregparm=3 \
|
|
-D${BOOT2_UFS} \
|
|
-DFLAGS=${BOOT_BOOT1_FLAGS} \
|
|
-DSIOPRT=${BOOT_COMCONSOLE_PORT} \
|
|
-DSIOFMT=${B2SIOFMT} \
|
|
-DSIOSPD=${BOOT_COMCONSOLE_SPEED} \
|
|
-I${.CURDIR}/../../.. \
|
|
-I${.CURDIR}/../../i386/boot2 \
|
|
-I${.CURDIR}/../../common \
|
|
-I${.CURDIR}/../btx/lib -I. \
|
|
-Wall -Waggregate-return -Wbad-function-cast -Wcast-align \
|
|
-Wmissing-declarations -Wmissing-prototypes -Wnested-externs \
|
|
-Wpointer-arith -Wshadow -Wstrict-prototypes -Wwrite-strings \
|
|
-Winline
|
|
|
|
CFLAGS.gcc+= -fno-guess-branch-probability \
|
|
-fno-unit-at-a-time \
|
|
-mno-align-long-strings \
|
|
--param max-inline-insns-single=100
|
|
|
|
# Set machine type to PC98_SYSTEM_PARAMETER
|
|
#CFLAGS+= -DSET_MACHINE_TYPE
|
|
|
|
# Initialize the bi_bios_geom using the BIOS geometry
|
|
#CFLAGS+= -DGET_BIOSGEOM
|
|
|
|
CFLAGS.clang+=${CLANG_OPT_SMALL}
|
|
|
|
LD_FLAGS=-static -N --gc-sections
|
|
|
|
# Pick up ../Makefile.inc early.
|
|
.include <bsd.init.mk>
|
|
|
|
.PATH: ${.CURDIR}/../../i386/boot2
|
|
|
|
CLEANFILES= boot
|
|
|
|
boot: boot1 boot2
|
|
cat boot1 boot2 > boot
|
|
|
|
CLEANFILES+= boot1 boot1.out boot1.o
|
|
|
|
boot1: boot1.out
|
|
objcopy -S -O binary boot1.out ${.TARGET}
|
|
|
|
boot1.out: boot1.o
|
|
${LD} ${LD_FLAGS} -e start -Ttext ${ORG1} -o ${.TARGET} boot1.o
|
|
|
|
CLEANFILES+= boot2 boot2.ld boot2.ldr boot2.bin boot2.out boot2.o \
|
|
boot2.s boot2.s.tmp boot2.h sio.o
|
|
|
|
boot2: boot2.ld
|
|
@set -- `ls -l boot2.ld`; x=$$((7680-$$5)); \
|
|
echo "$$x bytes available"; test $$x -ge 0
|
|
dd if=boot2.ld of=${.TARGET} obs=7680 conv=osync
|
|
|
|
boot2.ld: boot2.ldr boot2.bin ${BTXKERN}
|
|
btxld -v -E ${ORG2} -f bin -b ${BTXKERN} -l boot2.ldr \
|
|
-o ${.TARGET} -P 1 boot2.bin
|
|
|
|
boot2.ldr:
|
|
dd if=/dev/zero of=${.TARGET} bs=276 count=1
|
|
|
|
boot2.bin: boot2.out
|
|
objcopy -S -O binary boot2.out ${.TARGET}
|
|
|
|
boot2.out: ${BTXCRT} boot2.o sio.o
|
|
${LD} ${LD_FLAGS} -Ttext ${ORG2} -o ${.TARGET} ${.ALLSRC}
|
|
|
|
boot2.o: boot2.s
|
|
|
|
SRCS= boot2.c boot2.h
|
|
|
|
boot2.s: boot2.c boot2.h ${.CURDIR}/../../common/ufsread.c
|
|
${CC} ${CFLAGS} -S -o boot2.s.tmp ${.CURDIR}/boot2.c
|
|
sed -e '/align/d' -e '/nop/d' < boot2.s.tmp > boot2.s
|
|
rm -f boot2.s.tmp
|
|
|
|
boot2.h: boot1.out
|
|
${NM} -t d ${.ALLSRC} | awk '/([0-9])+ T (read|putc)/ \
|
|
{ x = $$1 - ORG1; \
|
|
printf("#define %sORG %#x\n", toupper($$3), REL1 + x) }' \
|
|
ORG1=`printf "%d" ${ORG1}` \
|
|
REL1=`printf "%d" ${REL1}` > ${.TARGET}
|
|
|
|
.include <bsd.prog.mk>
|
|
|
|
# XXX: clang integrated-as doesn't grok .codeNN directives yet
|
|
CFLAGS+= ${CLANG_NO_IAS}
|