a2037dba7e
LLD 10.0.0 changed the behavior of the -Ttext option, so that using -Ttext=0x0 now causes linking of the loaders to fail with: ld: error: output file too large: 18446744073707016908 bytes I reported this in https://bugs.llvm.org/show_bug.cgi?id=44715, and initially reverted the upstream change in r357259 to work around it. However, after some discussion with Fangrui Song in the upstream ticket, I think we can classify this as an unfortunate interaction between using -Ttext=0 in combination with --no-rosegment. (We added the latter in r332090, because btxld does not correctly handle input with more than 2 PT_LOAD segments.) Fangrui suggested to use a linker script instead, and Warner was already attempting this in r305353, but had to revert it due to "crypto-using boot problems" (not sure what those were :). This review updates the stand/i386/boot.ldscript to handle more sections, inserts some symbols like _edata and such that we use in libsa, and also discards any .interp section. It uses ORG which is defined on the linker command line using --defsym ORG=value to set the start of all the sections. Reviewed by: imp MFC after: 2 weeks Differential Revision: https://reviews.freebsd.org/D23952
89 lines
1.9 KiB
Makefile
89 lines
1.9 KiB
Makefile
# $FreeBSD$
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HAVE_ZFS= ${MK_LOADER_ZFS}
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LOADER_NET_SUPPORT?= yes
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LOADER_NFS_SUPPORT?= yes
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LOADER_TFTP_SUPPORT?= yes
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LOADER_CD9660_SUPPORT?= yes
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LOADER_EXT2FS_SUPPORT?= yes
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LOADER_MSDOS_SUPPORT?= yes
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LOADER_UFS_SUPPORT?= yes
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LOADER_GZIP_SUPPORT?= yes
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LOADER_BZIP2_SUPPORT?= yes
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.include <bsd.init.mk>
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LOADER?= loader_${LOADER_INTERP}
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PROG= ${LOADER}.sym
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INTERNALPROG=
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NEWVERSWHAT?= "bootstrap loader" x86
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VERSION_FILE= ${.CURDIR}/../loader/version
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.PATH: ${BOOTSRC}/i386/loader
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# architecture-specific loader code
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SRCS= main.c conf.c vers.c chain.c
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# Include bcache code.
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HAVE_BCACHE= yes
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# Enable PnP and ISA-PnP code.
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HAVE_PNP= yes
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HAVE_ISABUS= yes
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.if ${MK_LOADER_FIREWIRE} == "yes"
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CFLAGS+= -DLOADER_FIREWIRE_SUPPORT
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LIBFIREWIRE= ${BOOTOBJ}/i386/libfirewire/libfirewire.a
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.endif
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.if exists(${.CURDIR}/help.i386)
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HELP_FILES= ${.CURDIR}/help.i386
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.endif
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# Always add MI sources
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.include "${BOOTSRC}/loader.mk"
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CLEANFILES+= ${LOADER} ${LOADER}.bin
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ORG= 0x0
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CFLAGS+= -Wall
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LDFLAGS+= -static ${LDFLAGS_ORG} -Wl,--gc-sections
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# i386 standalone support library
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LIBI386= ${BOOTOBJ}/i386/libi386/libi386.a
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CFLAGS+= -I${BOOTSRC}/i386
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# Debug me!
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#CFLAGS+= -g
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#LDFLAGS+= -g
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${LOADER}: ${LOADER}.bin ${BTXLDR} ${BTXKERN}
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btxld -v -f aout -e ${LOADER_ADDRESS} -o ${.TARGET} -l ${BTXLDR} \
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-b ${BTXKERN} ${LOADER}.bin
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${LOADER}.bin: ${LOADER}.sym
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strip -R .comment -R .note -o ${.TARGET} ${.ALLSRC}
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.if ${MK_LOADER_ZFS} == "yes" && ${LOADER_INTERP} == ${LOADER_DEFAULT_INTERP}
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LINKS+= ${BINDIR}/${LOADER} ${BINDIR}/zfsloader
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.endif
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.if ${LOADER_INTERP} == ${LOADER_DEFAULT_INTERP}
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LINKS+= ${BINDIR}/${LOADER} ${BINDIR}/loader
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.endif
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FILES+= ${LOADER}
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FILESMODE_${LOADER}= ${BINMODE} -b
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# XXX crt0.o needs to be first for pxeboot(8) to work
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OBJS= ${BTXCRT}
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DPADD= ${LDR_INTERP32} ${LIBFIREWIRE} ${LIBI386} ${LIBSA32}
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LDADD= ${LDR_INTERP32} ${LIBFIREWIRE} ${LIBI386} ${LIBSA32}
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.if ${MACHINE_CPUARCH} == "amd64"
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CFLAGS+= -DLOADER_PREFER_AMD64
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.endif
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.include <bsd.prog.mk>
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