2022-10-27 18:45:45 +00:00
|
|
|
source_sh ${srcdir}/emulparams/elf32ppccommon.sh
|
|
|
|
|
source_sh ${srcdir}/emulparams/plt_unwind.sh
|
|
|
|
|
source_sh ${srcdir}/emulparams/dt-relr.sh
|
2012-03-26 19:18:29 +00:00
|
|
|
EXTRA_EM_FILE=ppc64elf
|
|
|
|
|
ELFSIZE=64
|
|
|
|
|
OUTPUT_FORMAT="elf64-powerpc"
|
|
|
|
|
TEXT_START_ADDR=0x10000000
|
|
|
|
|
#SEGMENT_SIZE=0x10000000
|
|
|
|
|
ARCH=powerpc:common64
|
2014-09-12 22:14:23 +00:00
|
|
|
unset EXECUTABLE_SYMBOLS
|
|
|
|
|
unset SDATA_START_SYMBOLS
|
|
|
|
|
unset SDATA2_START_SYMBOLS
|
|
|
|
|
unset SBSS_START_SYMBOLS
|
|
|
|
|
unset SBSS_END_SYMBOLS
|
|
|
|
|
unset OTHER_END_SYMBOLS
|
|
|
|
|
unset OTHER_RELRO_SECTIONS
|
2012-03-26 19:18:29 +00:00
|
|
|
OTHER_TEXT_SECTIONS="*(.sfpr .glink)"
|
2017-04-10 11:32:00 +00:00
|
|
|
OTHER_SDATA_SECTIONS="
|
2012-03-26 19:18:29 +00:00
|
|
|
.tocbss ${RELOCATING-0} :${RELOCATING+ ALIGN(8)} { *(.tocbss)}"
|
|
|
|
|
|
|
|
|
|
if test x${RELOCATING+set} = xset; then
|
|
|
|
|
GOT="
|
2015-08-28 15:32:19 +00:00
|
|
|
.got : ALIGN(256) { *(.got .toc) }"
|
2012-03-26 19:18:29 +00:00
|
|
|
else
|
|
|
|
|
GOT="
|
|
|
|
|
.got 0 : { *(.got) }
|
|
|
|
|
.toc 0 : { *(.toc) }"
|
|
|
|
|
fi
|
|
|
|
|
# Put .opd relocs first so ld.so will process them before any ifunc relocs.
|
|
|
|
|
INITIAL_RELOC_SECTIONS="
|
|
|
|
|
.rela.opd ${RELOCATING-0} : { *(.rela.opd) }"
|
|
|
|
|
OTHER_GOT_RELOC_SECTIONS="
|
|
|
|
|
.rela.toc ${RELOCATING-0} : { *(.rela.toc) }
|
2017-04-10 11:32:00 +00:00
|
|
|
.rela.toc1 ${RELOCATING-0} : { *(.rela.toc1) }
|
|
|
|
|
.rela.tocbss ${RELOCATING-0} : { *(.rela.tocbss) }
|
2012-03-26 19:18:29 +00:00
|
|
|
.rela.branch_lt ${RELOCATING-0} : { *(.rela.branch_lt) }"
|
2022-10-27 18:45:45 +00:00
|
|
|
# The idea behind setting .branch_lt address as we do below is to put
|
|
|
|
|
# it up against .got which is 256 byte aligned, so that the offset
|
|
|
|
|
# from .TOC. to an entry in .branch_lt remains fixed after stub
|
|
|
|
|
# sizing. (.eh_frame is edited late.) When -z relro -z now, we have
|
|
|
|
|
# .branch_lt, .plt, .iplt, then .got, so in that case we move
|
|
|
|
|
# .branch_lt so that the end of .iplt is against .got. All of these
|
|
|
|
|
# sections are linker generated, with alignment eight and size a
|
|
|
|
|
# multiple of eight, but a user playing games with their own
|
|
|
|
|
# .branch_lt, .plt or .iplt sections can result in unexpected
|
|
|
|
|
# alignment or size. Cope with that anyway. Note that if user
|
|
|
|
|
# alignment of .branch_lt is 256 or more then nothing special need be
|
|
|
|
|
# done.
|
|
|
|
|
#
|
|
|
|
|
# To understand what is going on here consider that the end address
|
|
|
|
|
# of .iplt should be 0 mod 256, so the start of .iplt should be
|
|
|
|
|
# -sizeof(.iplt) mod 256. But the start is constrained by alignment,
|
|
|
|
|
# so goes down to (-alignof(.iplt) & -sizeof(.iplt)) mod 256. Repeat
|
|
|
|
|
# that calculation for .plt and .branch_lt to find the start of
|
|
|
|
|
# .branch_lt then subtract . mod 256 to find the padding. Of course
|
|
|
|
|
# just one mod 256 suffices, which is done by anding with 255.
|
2017-04-10 11:32:00 +00:00
|
|
|
OTHER_RELRO_SECTIONS_2="
|
2012-03-26 19:18:29 +00:00
|
|
|
.opd ${RELOCATING-0} :${RELOCATING+ ALIGN(8)} { KEEP (*(.opd)) }
|
2017-04-10 11:32:00 +00:00
|
|
|
.toc1 ${RELOCATING-0} :${RELOCATING+ ALIGN(8)} { *(.toc1) }
|
2022-10-27 18:45:45 +00:00
|
|
|
.branch_lt ${RELOCATING-0}${RELOCATING+ALIGNOF(.branch_lt) < 256 && SIZEOF(.got) != 0 ? . + (((-MAX(ALIGNOF(.branch_lt),8) & (-SIZEOF(.branch_lt)${RELRO_NOW+ + (-MAX(ALIGNOF(.plt),8) & (-SIZEOF(.plt) + (-MAX(ALIGNOF(.iplt),8) & -SIZEOF(.iplt))))})) - .) & 255) : ALIGN(MAX(ALIGNOF(.branch_lt), SIZEOF(.got) != 0 ? 256 : 8))} : { *(.branch_lt) }"
|
2017-04-10 11:32:00 +00:00
|
|
|
INITIAL_READWRITE_SECTIONS="
|
|
|
|
|
.toc ${RELOCATING-0} :${RELOCATING+ ALIGN(8)} { *(.toc) }"
|
|
|
|
|
# Put .got before .data
|
|
|
|
|
DATA_GOT=" "
|
|
|
|
|
# Always make .got read-only after relocation
|
|
|
|
|
SEPARATE_GOTPLT=0
|
|
|
|
|
# Also put .sdata before .data
|
|
|
|
|
DATA_SDATA=" "
|
|
|
|
|
# and .plt/.iplt before .data
|
|
|
|
|
DATA_PLT=
|
|
|
|
|
PLT_BEFORE_GOT=" "
|
