From 950b68acd41db8383c98a48607741771a9131127 Mon Sep 17 00:00:00 2001 From: Sergey Bugaev Date: Mon, 1 Jan 2024 14:53:09 +0300 Subject: [PATCH] Add support for the aarch64-gnu target (GNU/Hurd on AArch64) Also recognized are aarch64-*-gnu tagrets, e.g. aarch64-pc-gnu or aarch64-unknown-gnu. The ld/emulparams/aarch64gnu.sh file is (for now) identical to aarch64fbsd.sh, or to aarch64linux.sh with Linux-specific logic removed; and mainly different from the generic aarch64elf.sh in that it does not set EMBEDDED=yes. Coupled with a corresponding GCC patch, this produces a toolchain that can sucessfully build working binaries targeting aarch64-gnu. Signed-off-by: Sergey Bugaev --- bfd/config.bfd | 2 +- gas/configure.tgt | 1 + ld/configure.tgt | 5 +++++ ld/emulparams/aarch64gnu.sh | 37 +++++++++++++++++++++++++++++++++++++ 4 files changed, 44 insertions(+), 1 deletion(-) create mode 100644 ld/emulparams/aarch64gnu.sh diff --git a/bfd/config.bfd b/bfd/config.bfd index d50a12abc6a..bbf12447517 100644 --- a/bfd/config.bfd +++ b/bfd/config.bfd @@ -284,7 +284,7 @@ case "${targ}" in targ_selvecs="aarch64_elf64_be_vec aarch64_elf32_le_vec aarch64_elf32_be_vec arm_elf32_le_vec arm_elf32_be_vec" want64=true ;; - aarch64-*-linux* | aarch64-*-netbsd* | aarch64-*-nto*) + aarch64-*-linux* | aarch64-*-netbsd* | aarch64-*-nto* | aarch64-*-gnu*) targ_defvec=aarch64_elf64_le_vec targ_selvecs="aarch64_elf64_be_vec aarch64_elf32_le_vec aarch64_elf32_be_vec arm_elf32_le_vec arm_elf32_be_vec aarch64_pei_le_vec aarch64_pe_le_vec" want64=true diff --git a/gas/configure.tgt b/gas/configure.tgt index e1e6ce0fe97..7c66734e362 100644 --- a/gas/configure.tgt +++ b/gas/configure.tgt @@ -134,6 +134,7 @@ case ${generic_target} in case ${cpu}-${os} in aarch64*-linux-gnu_ilp32) arch=aarch64:32 ;; esac ;; + aarch64*-*-gnu*) fmt=elf em=gnu ;; aarch64*-*-netbsd*) fmt=elf em=nbsd;; aarch64*-*-nto*) fmt=elf;; aarch64*-*-openbsd*) fmt=elf;; diff --git a/ld/configure.tgt b/ld/configure.tgt index 43535c78b55..f937f78b876 100644 --- a/ld/configure.tgt +++ b/ld/configure.tgt @@ -116,6 +116,11 @@ aarch64-*-linux*) targ_emul=aarch64linux targ_extra_libpath="aarch64linuxb aarch64linux32 aarch64linux32b armelfb_linux_eabi armelf_linux_eabi" targ_extra_emuls="aarch64elf aarch64elf32 aarch64elf32b aarch64elfb armelf armelfb $targ_extra_libpath" ;; +# This has to come after aarch64-*-linux* for aarch64-*-linux-gnu to hit the Linux branch. +aarch64-*-gnu*) + targ_emul=aarch64gnu + targ_extra_emuls="aarch64elf aarch64elfb armelf armelfb" + ;; aarch64-*-haiku*) targ_emul=aarch64haiku targ_extra_emuls="aarch64elf aarch64elf32 aarch64elf32b aarch64elfb armelf armelfb armelf_haiku $targ_extra_libpath" ;; diff --git a/ld/emulparams/aarch64gnu.sh b/ld/emulparams/aarch64gnu.sh new file mode 100644 index 00000000000..0bcab7a4baa --- /dev/null +++ b/ld/emulparams/aarch64gnu.sh @@ -0,0 +1,37 @@ +ARCH=aarch64 +MACHINE= +NOP=0x1f2003d5 + +SCRIPT_NAME=elf +ELFSIZE=64 +OUTPUT_FORMAT="elf64-littleaarch64" +BIG_OUTPUT_FORMAT="elf64-bigaarch64" +LITTLE_OUTPUT_FORMAT="elf64-littleaarch64" +NO_REL_RELOCS=yes + +TEMPLATE_NAME=elf +EXTRA_EM_FILE=aarch64elf + +GENERATE_SHLIB_SCRIPT=yes +GENERATE_PIE_SCRIPT=yes + +MAXPAGESIZE="CONSTANT (MAXPAGESIZE)" +COMMONPAGESIZE="CONSTANT (COMMONPAGESIZE)" +SEPARATE_GOTPLT=24 +IREL_IN_PLT= + +TEXT_START_ADDR=0x400000 + +DATA_START_SYMBOLS='PROVIDE (__data_start = .);'; + +# AArch64 does not support .s* sections. +NO_SMALL_DATA=yes + +OTHER_BSS_SYMBOLS="${CREATE_SHLIB+PROVIDE (}__bss_start__ = .${CREATE_SHLIB+)};" +OTHER_BSS_END_SYMBOLS="${CREATE_SHLIB+PROVIDE (}_bss_end__ = .${CREATE_SHLIB+)}; ${CREATE_SHLIB+PROVIDE (}__bss_end__ = .${CREATE_SHLIB+)};" +OTHER_END_SYMBOLS="${CREATE_SHLIB+PROVIDE (}__end__ = .${CREATE_SHLIB+)};" + +OTHER_SECTIONS='.note.gnu.arm.ident 0 : { KEEP (*(.note.gnu.arm.ident)) }' +ATTRS_SECTIONS='.ARM.attributes 0 : { KEEP (*(.ARM.attributes)) KEEP (*(.gnu.attributes)) }' +# Ensure each PLT entry is aligned to a cache line. +PLT=".plt ${RELOCATING-0} : ALIGN(16) { *(.plt)${RELOCATING+${IREL_IN_PLT+ *(.iplt)}} }" -- 2.11.4.GIT