8c37241be3
* elflink.c (elf_bfd_final_link): Don't output STT_SECTION symbol
into .dynsym if elf_section_data (sec)->dynindx <= 0.
Adjust counting of last_local.
(_bfd_elf_link_renumber_dynsyms): Don't assign dynindx to sections
other than SHT_PROGBITS/SHT_NOBITS and neither for .got/.got.plt/.plt
created by the linker nor !SHF_ALLOC.
* elf32-i386.c (elf_i386_finish_dynamic_sections): Point
DT_PLTGOT to the start of the .got.plt section instead of the
.got output section. Set sh_entsize for .got section in addition
to .got.plt.
(elf_i386_relocate_section): Don't assume _GLOBAL_OFFSET_TABLE_
is at sgot->output_section->vma.
* elf64-x86-64.c (elf64_x86_64_finish_dynamic_sections): Point
DT_PLTGOT to the start of the .got.plt section instead of the
.got output section.
(elf64_x86_64_relocate_section): Don't assume _GLOBAL_OFFSET_TABLE_
is at sgot->output_section->vma. Set sh_entsize for .got section
in addition to .got.plt.
* elf.c (_bfd_elf_print_private_bfd_data): Handle PT_GNU_RELRO.
(bfd_section_from_phdr): Likewise.
(map_sections_to_segments): Likewise.
(assign_file_positions_for_segments): Likewise.
(get_program_header_size): Likewise.
* elflink.c (bfd_elf_size_dynamic_sections): Set
elf_tdata (output_bfd)->relro from info->relro.
* elf-bfd.h (struct elf_obj_tdata): Add relro field.
include/
* bfdlink.h (struct bfd_link_info): Add relro, relro_start and
relro_end fields.
* elf/common.h (PT_GNU_EH_FRAME, PT_GNU_STACK): Add comments.
(PT_GNU_RELRO): Define.
binutils/
* readelf.c (get_segment_type): Handle PT_GNU_RELRO.
ld/
* genscripts.sh: Generate -z combreloc -z now -z relro scripts
for binaries, -shared and -pie.
* emulparams/elf_i386.sh (SEPARATE_GOTPLT): Set.
* emulparams/elf_x86_64.sh (SEPARATE_GOTPLT): Set.
* emulparams/elf32ppc.sh (OTHER_READWRITE_SECTIONS): Rename to...
(OTHER_RELRO_SECTIONS): ... this.
* ldlex.l (DATA_SEGMENT_RELRO_END): Add.
* emultempl/elf32.em (gld${EMULATION_NAME}_handle_option): Handle
-z relro and -z norelro.
(gld${EMULATION_NAME}_list_options): Add it to usage.
(gld${EMULATION_NAME}_get_script): Return -z combreloc -z now
-z relro scripts when appropriate.
* scripttempl/elf.sc: Unset SEPARATE_GOTPLT if RELRO_NOW is set.
Create separate .got.plt section if SEPARATE_GOTPLT.
Move sections which are only written during relocation handling
to the beginning of RW segment. If NO_SMALL_DATA, move .got
before .data. Add DATA_SEGMENT_RELRO_END directive.
Include OTHER_RELRO_SECTIONS.
* ldgram.y (DATA_SEGMENT_RELRO_END): Add.
* ldexp.c (exp_print_token): Handle DATA_SEGMENT_RELRO_END.
(fold_unary): Likewise.
(fold_binary): Handle -z relro.
* ldexp.h (struct exp_data_seg): Add exp_dataseg_relro_seen and
exp_dataseg_relro_adjust phases. Add relro_end field.
* ldmain.c (main): Initialize link_info.relro to FALSE.
* ldlang.c (lang_size_sections): Handle -z relro.
ld/testsuite/
* ld-i386/tlspic.rd: Adjust for section reordering changes
and removal of unneeded STT_SECTION symbols from .dynsym.
* ld-i386/tlspic.dd: Likewise.
* ld-i386/tlspic.sd: Likewise.
* ld-i386/tlsbin.rd: Likewise.
* ld-i386/tlsbinpic.s: Likewise.
* ld-i386/tlsbin.dd: Likewise.
* ld-i386/tlsbin.sd: Likewise.
* ld-i386/tlsnopic.rd: Likewise.
* ld-i386/tlsnopic1.s: Likewise.
* ld-i386/combreloc.d: Likewise.
* ld-i386/tlsnopic.dd: Likewise.
* ld-i386/tlsnopic.sd: Likewise.
* ld-x86-64/tlspic.rd: Likewise.
* ld-x86-64/tlspic.dd: Likewise.
* ld-x86-64/tlsbin.dd: Likewise.
* ld-x86-64/tlspic.sd: Likewise.
* ld-x86-64/tlsbin.sd: Likewise.
* ld-x86-64/tlspic.td: Likewise.
* ld-x86-64/tlsbin.td: Likewise.
* ld-x86-64/tlsbin.rd: Likewise.
* ld-s390/tlspic1.s: Likewise.
* ld-s390/tlsbinpic.s: Likewise.
* ld-s390/tlspic.rd: Likewise.
* ld-s390/tlsbin.rd: Likewise.
* ld-s390/tlspic.dd: Likewise.
* ld-s390/tlsbin.dd: Likewise.
* ld-s390/tlsbin.sd: Likewise.
* ld-s390/tlsbin.td: Likewise.
* ld-s390/tlspic.sd: Likewise.
* ld-s390/tlspic.td: Likewise.
* ld-s390/tlspic1_64.s: Likewise.
* ld-s390/tlsbinpic_64.s: Likewise.
* ld-s390/tlspic_64.rd: Likewise.
* ld-s390/tlsbin_64.rd: Likewise.
* ld-s390/tlspic_64.dd: Likewise.
* ld-s390/tlsbin_64.dd: Likewise.
* ld-s390/tlspic_64.sd: Likewise.
* ld-s390/tlspic_64.td: Likewise.
* ld-s390/tlsbin_64.td: Likewise.
* ld-s390/tlsbin_64.sd: Likewise.
* ld-powerpc/tlsexe32.r: Likewise.
* ld-powerpc/tlsso32.r: Likewise.
* ld-powerpc/tlsso32.d: Likewise.
* ld-powerpc/tlsso32.g: Likewise.
* ld-powerpc/tlsso32.t: Likewise.
* ld-powerpc/tlsexe.r: Likewise.
* ld-powerpc/tlsso.r: Likewise.
* ld-powerpc/tlsso.g: Likewise.
* ld-powerpc/tlsexetoc.r: Likewise.
* ld-powerpc/tlstocso.r: Likewise.
* ld-powerpc/tlstocso.g: Likewise.
* ld-ia64/tlspic.rd: Likewise.
* ld-ia64/tlspic.dd: Likewise.
* ld-ia64/tlspic.sd: Likewise.
* ld-ia64/tlspic.td: Likewise.
* ld-ia64/tlsbin.rd: Likewise.
* ld-ia64/tlsbin.sd: Likewise.
* ld-ia64/tlsbin.td: Likewise.
* ld-elfvsb/elfvsb.exp: XFAIL non-PIC load offset tests on s390x.
* ld-shared/shared.exp: Likewise.
370 lines
12 KiB
Bash
Executable File
370 lines
12 KiB
Bash
Executable File
#!/bin/sh
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# genscripts.sh - generate the ld-emulation-target specific files
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#
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# Usage: genscripts_extra.sh \
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# srcdir \
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# libdir \
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# exec_prefix \
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# host \
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# target \
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# target_alias \
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# default_emulation \
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# native_lib_dirs \
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# use_sysroot \
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# this_emulation \
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# optional:
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# tool_dir \
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# customizer_script
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#
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# Sample usage:
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#
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# genscripts_extra.sh \
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# /sources/ld \
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# /usr/local/lib \
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# /usr/local \
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# sparc-sun-sunos4.1.3 \
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# sparc-sun-sunos4.1.3 \
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# sparc-sun-sunos4.1.3 \
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# sun4 \
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# "" \
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# no \
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# sun3 \
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# sparc-sun-sunos4.1.3 \
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# sparc.sh
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#
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# produces the linker scripts:
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#
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# sun3.x [default linker script]
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# sun3.xbn [used when the linker is invoked with "-N"]
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# sun3.xn [used when the linker is invoked with "-n"]
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# sun3.xr [used when the linker is invoked with "-r"]
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# sun3.xu [used when the linker is invoked with "-Ur"]
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# and maybe:
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# sun3.xc [used when the linker is invoked with "-z combreloc"]
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# sun3.xsc [used when the linker is invoked with "--shared"]
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# sun3.xdc [used when the linker is invoked with "-pie"]
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#
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# It also produced the C source file:
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#
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# em_sun3.c
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#
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# which is then compiled into the linker.
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#
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# The linker scripts are created by running the shell script
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# /sources/ld/emulparams/sparc.sh to set the value of ${SCRIPT_NAME}
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# (and any other variables it wants to). ${SCRIPT_NAME} is then
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# invoked with a variable called ${LD_FLAG} to tell it which version
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# of the linker script to create.
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srcdir=$1
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libdir=$2
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exec_prefix=$3
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host=$4
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target=$5
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target_alias=$6
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EMULATION_LIBPATH=$7
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NATIVE_LIB_DIRS=$8
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use_sysroot=$9
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shift 9
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EMULATION_NAME=$1
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TOOL_LIB=$2
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CUSTOMIZER_SCRIPT=$3
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# Can't use ${TOOL_LIB:-$target_alias} here due to an Ultrix shell bug.
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if [ "x${TOOL_LIB}" = "x" ] ; then
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tool_lib=${exec_prefix}/${target_alias}/lib
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else
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tool_lib=${exec_prefix}/${TOOL_LIB}/lib
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fi
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if [ "x${CUSTOMIZER_SCRIPT}" = "x" ] ; then
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CUSTOMIZER_SCRIPT=${EMULATION_NAME}
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fi
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CUSTOMIZER_SCRIPT="${srcdir}/emulparams/${CUSTOMIZER_SCRIPT}.sh"
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# Include the emulation-specific parameters:
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. ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME}
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if test -d ldscripts; then
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true
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else
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mkdir ldscripts
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fi
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# Set some flags for the emultempl scripts. USE_LIBPATH will
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# be set for any libpath-using emulation; NATIVE will be set for a
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# libpath-using emulation where ${host} = ${target}. NATIVE
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# may already have been set by the emulparams file, but that's OK
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# (it'll just get set to "yes" twice).
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case " $EMULATION_LIBPATH " in
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*" ${EMULATION_NAME} "*)
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if [ "x${host}" = "x${target}" ] ; then
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NATIVE=yes
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USE_LIBPATH=yes
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elif [ "x${use_sysroot}" = "xyes" ] ; then
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USE_LIBPATH=yes
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fi
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;;
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esac
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# If the emulparams file sets NATIVE, make sure USE_LIBPATH is set also.
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if test "x$NATIVE" = "xyes" ; then
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USE_LIBPATH=yes
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fi
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# Set the library search path, for libraries named by -lfoo.
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# If LIB_PATH is defined (e.g., by Makefile) and non-empty, it is used.
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# Otherwise, the default is set here.
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#
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# The format is the usual list of colon-separated directories.
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# To force a logically empty LIB_PATH, do LIBPATH=":".
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#
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# If we are using a sysroot, prefix library paths with "=" to indicate this.
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#
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# If the emulparams file set LIBPATH_SUFFIX, prepend an extra copy of
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# the library path with the suffix applied.
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if [ "x${LIB_PATH}" = "x" ] && [ "x${USE_LIBPATH}" = xyes ] ; then
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LIB_PATH2=
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libs=${NATIVE_LIB_DIRS}
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if [ "x${use_sysroot}" != "xyes" ] ; then
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case " ${libs} " in
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*" ${libdir} "*) ;;
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*) libs="${libdir} ${libs}" ;;
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esac
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case " ${libs} " in
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*" ${tool_lib} "*) ;;
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*) libs="${tool_lib} ${libs}" ;;
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esac
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fi
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for lib in ${libs}; do
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# The "=" is harmless if we aren't using a sysroot, but also needless.
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if [ "x${use_sysroot}" = "xyes" ] ; then
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lib="=${lib}"
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fi
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addsuffix=
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case "${LIBPATH_SUFFIX}:${lib}" in
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:*) ;;
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*:*${LIBPATH_SUFFIX}) ;;
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*) addsuffix=yes ;;
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esac
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if test -n "$addsuffix"; then
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case :${LIB_PATH}: in
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*:${lib}${LIBPATH_SUFFIX}:*) ;;
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::) LIB_PATH=${lib}${LIBPATH_SUFFIX} ;;
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*) LIB_PATH=${LIB_PATH}:${lib}${LIBPATH_SUFFIX} ;;
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esac
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case :${LIB_PATH}:${LIB_PATH2}: in
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*:${lib}:*) ;;
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*::) LIB_PATH2=${lib} ;;
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*) LIB_PATH2=${LIB_PATH2}:${lib} ;;
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esac
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else
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case :${LIB_PATH2}: in
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*:${lib}:*) ;;
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::) LIB_PATH2=${lib} ;;
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*) LIB_PATH2=${LIB_PATH2}:${lib} ;;
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esac
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fi
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done
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case :${LIB_PATH}:${LIB_PATH2}: in
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*:: | ::*) LIB_PATH=${LIB_PATH}${LIB_PATH2} ;;
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*) LIB_PATH=${LIB_PATH}:${LIB_PATH2} ;;
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esac
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fi
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# Always search $(tooldir)/lib, aka /usr/local/TARGET/lib, except for
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# sysrooted configurations and when LIBPATH=":".
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if [ "x${use_sysroot}" != "xyes" ] ; then
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case :${LIB_PATH}: in
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::: | *:${tool_lib}:*) ;;
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::) LIB_PATH=${tool_lib} ;;
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*) LIB_PATH=${tool_lib}:${LIB_PATH} ;;
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esac
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fi
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LIB_SEARCH_DIRS=`echo ${LIB_PATH} | sed -e 's/:/ /g' -e 's/\([^ ][^ ]*\)/SEARCH_DIR(\\"\1\\");/g'`
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# We need it for testsuite.
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case " $EMULATION_LIBPATH " in
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*" ${EMULATION_NAME} "*)
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test -d tmpdir || mkdir tmpdir
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test -f tmpdir/libpath.exp || \
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echo "set libpath \"${LIB_PATH}\"" | sed -e 's/:/ /g' > tmpdir/libpath.exp
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;;
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esac
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# Generate 5 or 6 script files from a master script template in
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# ${srcdir}/scripttempl/${SCRIPT_NAME}.sh. Which one of the 5 or 6
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# script files is actually used depends on command line options given
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# to ld. (SCRIPT_NAME was set in the emulparams_file.)
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#
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# A .x script file is the default script.
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# A .xr script is for linking without relocation (-r flag).
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# A .xu script is like .xr, but *do* create constructors (-Ur flag).
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# A .xn script is for linking with -n flag (mix text and data on same page).
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# A .xbn script is for linking with -N flag (mix text and data on same page).
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# A .xs script is for generating a shared library with the --shared
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# flag; it is only generated if $GENERATE_SHLIB_SCRIPT is set by the
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# emulation parameters.
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# A .xc script is for linking with -z combreloc; it is only generated if
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# $GENERATE_COMBRELOC_SCRIPT is set by the emulation parameters or
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# $SCRIPT_NAME is "elf".
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# A .xsc script is for linking with --shared -z combreloc; it is generated
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# if $GENERATE_COMBRELOC_SCRIPT is set by the emulation parameters or
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# $SCRIPT_NAME is "elf" and $GENERATE_SHLIB_SCRIPT is set by the emulation
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# parameters too.
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if [ "x$SCRIPT_NAME" = "xelf" ]; then
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GENERATE_COMBRELOC_SCRIPT=yes
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fi
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SEGMENT_SIZE=${SEGMENT_SIZE-${MAXPAGESIZE-${TARGET_PAGE_SIZE}}}
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# Determine DATA_ALIGNMENT for the 5 variants, using
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# values specified in the emulparams/<script_to_run>.sh file or default.
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DATA_ALIGNMENT_="${DATA_ALIGNMENT_-${DATA_ALIGNMENT-ALIGN(${SEGMENT_SIZE})}}"
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DATA_ALIGNMENT_n="${DATA_ALIGNMENT_n-${DATA_ALIGNMENT_}}"
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DATA_ALIGNMENT_N="${DATA_ALIGNMENT_N-${DATA_ALIGNMENT-.}}"
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DATA_ALIGNMENT_r="${DATA_ALIGNMENT_r-${DATA_ALIGNMENT-}}"
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DATA_ALIGNMENT_u="${DATA_ALIGNMENT_u-${DATA_ALIGNMENT_r}}"
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LD_FLAG=r
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DATA_ALIGNMENT=${DATA_ALIGNMENT_r}
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DEFAULT_DATA_ALIGNMENT="ALIGN(${SEGMENT_SIZE})"
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( echo "/* Script for ld -r: link without relocation */"
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. ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME}
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. ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
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) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xr
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LD_FLAG=u
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DATA_ALIGNMENT=${DATA_ALIGNMENT_u}
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CONSTRUCTING=" "
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( echo "/* Script for ld -Ur: link w/out relocation, do create constructors */"
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. ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME}
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. ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
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) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xu
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LD_FLAG=
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DATA_ALIGNMENT=${DATA_ALIGNMENT_}
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RELOCATING=" "
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( echo "/* Default linker script, for normal executables */"
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. ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME}
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. ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
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) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.x
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LD_FLAG=n
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DATA_ALIGNMENT=${DATA_ALIGNMENT_n}
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TEXT_START_ADDR=${NONPAGED_TEXT_START_ADDR-${TEXT_START_ADDR}}
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( echo "/* Script for -n: mix text and data on same page */"
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. ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME}
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. ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
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) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xn
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LD_FLAG=N
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DATA_ALIGNMENT=${DATA_ALIGNMENT_N}
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( echo "/* Script for -N: mix text and data on same page; don't align data */"
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. ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME}
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. ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
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) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xbn
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if test -n "$GENERATE_COMBRELOC_SCRIPT"; then
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DATA_ALIGNMENT=${DATA_ALIGNMENT_c-${DATA_ALIGNMENT_}}
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LD_FLAG=c
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COMBRELOC=ldscripts/${EMULATION_NAME}.xc.tmp
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( echo "/* Script for -z combreloc: combine and sort reloc sections */"
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. ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME}
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. ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
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) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xc
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rm -f ${COMBRELOC}
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LD_FLAG=w
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RELRO_NOW=" "
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COMBRELOC=ldscripts/${EMULATION_NAME}.xw.tmp
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( echo "/* Script for -z combreloc -z now -z relro: combine and sort reloc sections */"
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. ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME}
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. ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
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) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xw
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rm -f ${COMBRELOC}
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COMBRELOC=
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unset RELRO_NOW
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fi
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if test -n "$GENERATE_SHLIB_SCRIPT"; then
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LD_FLAG=shared
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DATA_ALIGNMENT=${DATA_ALIGNMENT_s-${DATA_ALIGNMENT_}}
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CREATE_SHLIB=" "
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# Note that TEXT_START_ADDR is set to NONPAGED_TEXT_START_ADDR.
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(
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echo "/* Script for ld --shared: link shared library */"
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. ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME}
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. ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
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) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xs
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if test -n "$GENERATE_COMBRELOC_SCRIPT"; then
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LD_FLAG=cshared
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DATA_ALIGNMENT=${DATA_ALIGNMENT_sc-${DATA_ALIGNMENT}}
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COMBRELOC=ldscripts/${EMULATION_NAME}.xsc.tmp
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( echo "/* Script for --shared -z combreloc: shared library, combine & sort relocs */"
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. ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME}
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. ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
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) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xsc
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rm -f ${COMBRELOC}
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LD_FLAG=wshared
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RELRO_NOW=" "
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COMBRELOC=ldscripts/${EMULATION_NAME}.xsw.tmp
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( echo "/* Script for --shared -z combreloc -z now -z relro: shared library, combine & sort relocs */"
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. ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME}
|
|
. ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
|
|
) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xsw
|
|
rm -f ${COMBRELOC}
|
|
COMBRELOC=
|
|
unset RELRO_NOW
|
|
fi
|
|
unset CREATE_SHLIB
|
|
fi
|
|
|
|
if test -n "$GENERATE_PIE_SCRIPT"; then
|
|
LD_FLAG=pie
|
|
DATA_ALIGNMENT=${DATA_ALIGNMENT_s-${DATA_ALIGNMENT_}}
|
|
CREATE_PIE=" "
|
|
# Note that TEXT_START_ADDR is set to NONPAGED_TEXT_START_ADDR.
|
|
(
|
|
echo "/* Script for ld -pie: link position independent executable */"
|
|
. ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME}
|
|
. ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
|
|
) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xd
|
|
if test -n "$GENERATE_COMBRELOC_SCRIPT"; then
|
|
LD_FLAG=cpie
|
|
DATA_ALIGNMENT=${DATA_ALIGNMENT_sc-${DATA_ALIGNMENT}}
|
|
COMBRELOC=ldscripts/${EMULATION_NAME}.xdc.tmp
|
|
( echo "/* Script for -pie -z combreloc: position independent executable, combine & sort relocs */"
|
|
. ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME}
|
|
. ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
|
|
) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xdc
|
|
rm -f ${COMBRELOC}
|
|
LD_FLAG=wpie
|
|
RELRO_NOW=" "
|
|
COMBRELOC=ldscripts/${EMULATION_NAME}.xdw.tmp
|
|
( echo "/* Script for -pie -z combreloc -z now -z relro: position independent executable, combine & sort relocs */"
|
|
. ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME}
|
|
. ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
|
|
) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xdw
|
|
rm -f ${COMBRELOC}
|
|
COMBRELOC=
|
|
unset RELRO_NOW
|
|
fi
|
|
unset CREATE_PIE
|
|
fi
|
|
|
|
case " $EMULATION_LIBPATH " in
|
|
*" ${EMULATION_NAME} "*) COMPILE_IN=true;;
|
|
esac
|
|
|
|
# Generate e${EMULATION_NAME}.c.
|
|
. ${srcdir}/emultempl/${TEMPLATE_NAME-generic}.em
|