binutils-gdb/gas/configure.tgt
Marcus Comstedt fbc09e7af7 RISC-V: Implement support for big endian targets.
RISC-V instruction/code is always little endian, but data might be
big-endian.  Therefore, we can not use the original bfd_get/bfd_put
to get/put the code for big endian targets.  Add new riscv_get_insn
and riscv_put_insn to always get/put code as little endian can resolve
the problem.  Just remember to update them once we have supported
the 48-bit/128-bit instructions in the future patches.

bfd/
    * config.bfd: Added targets riscv64be*-*-*, riscv32be*-*-* and
    riscvbe*-*-*.  Also added riscv_elf[32|64]_be_vec.
    * configure.ac: Handle riscv_elf[32|64]_be_vec.
    * configure: Regenerate.
    * elfnn-riscv.c: Include <limits.h> and define CHAR_BIT for
    riscv_is_insn_reloc.
    (riscv_get_insn): RISC-V instructions are always little endian, but
    bfd_get may be used for big-endian, so add new riscv_get_insn to handle
    the insturctions.
    (riscv_put_insn): Likewsie.
    (riscv_is_insn_reloc): Check if we are relocaing an instruction.
    (perform_relocation): Call riscv_is_insn_reloc to decide if we should
    use riscv_[get|put]_insn or bfd_[get|put].
    (riscv_zero_pcrel_hi_reloc): Use riscv_[get|put]_insn, bfd_[get|put]l32
    or bfd_[get|put]l16 for code.
    (riscv_elf_relocate_section): Likewise.
    (riscv_elf_finish_dynamic_symbol): Likewise.
    (riscv_elf_finish_dynamic_sections): Likewise.
    (_bfd_riscv_relax_call): Likewise.
    (_bfd_riscv_relax_lui): Likewise.
    (_bfd_riscv_relax_align): Likewise.
    (_bfd_riscv_relax_pc): Likewise.
    (riscv_elf_object_p): Handled for big endian.
    (TARGET_BIG_SYM, TARGET_BIG_NAME): Defined.
    * targets.c: Add riscv_elf[32|64]_be_vec.
    (_bfd_target_vector): Likewise.

gas/
    * config/tc-riscv.c (riscv_target_format): Add elf64-bigriscv and
    elf32-bigriscv.
    (install_insn): Always write instructions as little endian.
    (riscv_make_nops): Likewise.
    (md_convert_frag_branch): Likewise.
    (md_number_to_chars): Write data in target endianness.
    (options, md_longopts): Add -mbig-endian and -mlittle-endian options.
    (md_parse_option): Handle the endian options.
    * config/tc-riscv.h: Only define TARGET_BYTES_BIG_ENDIAN if not
    already defined.
    * configure.tgt: Added riscv64be*, riscv32be*, riscvbe*.

ld/
    * configure.tgt: Added riscvbe-*-*, riscv32be*-*-*, riscv64be*-*-*,
    riscv32be*-*-linux*, and riscv64be*-*-linux*.
    * Makefile.am: Added eelf32briscv.c, eelf32briscv_ilp32f.c and
    eelf32briscv_ilp32.c.
    * Makefile.in: Regenerate.
    * emulparams/elf32briscv.sh: Added.
    * emulparams/elf32briscv_ilp32.sh: Likewise.
    * emulparams/elf32briscv_ilp32f.sh: Likewise.
    * emulparams/elf64briscv.sh: Likewise.
    * emulparams/elf64briscv_lp64.sh: Likewise.
    * emulparams/elf64briscv_lp64f.sh: Likewise.
2021-01-06 17:57:52 +08:00

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# gas target specific configuration file. This is a -*- sh -*- file.
#
# Copyright (C) 2012-2021 Free Software Foundation, Inc.
#
# This file is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; see the file COPYING3. If not see
# <http://www.gnu.org/licenses/>.
#
# This is invoked by configure. Putting it in a separate shell file
# lets us skip running autoconf when modifying target specific
# information.
# Input shell variables:
# targ a configuration target name, such as i686-pc-linux-gnu.
# Output shell variables:
# cpu_type canonical gas cpu type; identifies the config/tc-* files
# fmt output format; identifies the config/obj-* files
# em emulation; identifies the config/te-* files
# Optional output shell variables; these are not always set:
# arch the default architecture; sets DEFAULT_ARCH on some systems
# endian "big" or "little"; used on bi-endian systems
cpu_type=
fmt=
em=generic
bfd_gas=no
arch=
endian=
eval `echo $targ | sed 's/^\([^-]*\)-\([^-]*\)-\(.*\)$/cpu=\1 vendor=\2 os=\3/'`
# Check for architecture variants. Set cpu_type and, optionally,
# endian and arch.
# Note: This table is alpha-sorted, please try to keep it that way.
case ${cpu} in
aarch64) cpu_type=aarch64 endian=little arch=aarch64;;
aarch64_be) cpu_type=aarch64 endian=big arch=aarch64;;
alpha*) cpu_type=alpha ;;
am33_2.0) cpu_type=mn10300 endian=little ;;
arc*eb) cpu_type=arc endian=big ;;
arm*be|arm*b) cpu_type=arm endian=big ;;
arm*) cpu_type=arm endian=little ;;
bfin*) cpu_type=bfin endian=little ;;
c4x*) cpu_type=tic4x ;;
cr16*) cpu_type=cr16 endian=little ;;
crisv32) cpu_type=cris arch=crisv32 ;;
crx*) cpu_type=crx endian=little ;;
epiphany*) cpu_type=epiphany endian=little ;;
fido) cpu_type=m68k ;;
hppa*) cpu_type=hppa ;;
i[3-7]86) cpu_type=i386 arch=i386;;
ia16) cpu_type=i386 arch=i386;;
ia64) cpu_type=ia64 ;;
ip2k) cpu_type=ip2k endian=big ;;
iq2000) cpu_type=iq2000 endian=big ;;
lm32) cpu_type=lm32 ;;
m32c) cpu_type=m32c endian=little ;;
m32r) cpu_type=m32r endian=big ;;
m32rle) cpu_type=m32r endian=little ;;
m5200) cpu_type=m68k ;;
m68008) cpu_type=m68k ;;
m680[012346]0) cpu_type=m68k ;;
m6811|m6812|m68hc12) cpu_type=m68hc11 ;;
m683??) cpu_type=m68k ;;
s12z) cpu_type=s12z ;;
mep) cpu_type=mep endian=little ;;
microblazeel*) cpu_type=microblaze endian=little;;
microblaze*) cpu_type=microblaze endian=big;;
mips*el) cpu_type=mips endian=little ;;
mips*) cpu_type=mips endian=big ;;
mt) cpu_type=mt endian=big ;;
nds32be) cpu_type=nds32 endian=big ;;
nds32le) cpu_type=nds32 endian=little ;;
or1k* | or1knd*) cpu_type=or1k endian=big ;;
pjl*) cpu_type=pj endian=little ;;
pj*) cpu_type=pj endian=big ;;
powerpc*le*) cpu_type=ppc endian=little ;;
powerpc*) cpu_type=ppc endian=big ;;
riscv64be*) cpu_type=riscv endian=big arch=riscv64 ;;
riscv64*) cpu_type=riscv endian=little arch=riscv64 ;;
riscv32be*|riscvbe*) cpu_type=riscv endian=big arch=riscv32 ;;
riscv32* | riscv*) cpu_type=riscv endian=little arch=riscv32 ;;
rs6000*) cpu_type=ppc ;;
rl78*) cpu_type=rl78 ;;
rx) cpu_type=rx ;;
s390x*) cpu_type=s390 arch=s390x ;;
s390*) cpu_type=s390 arch=s390 ;;
score*l) cpu_type=score endian=little ;;
score*) cpu_type=score endian=big ;;
sh*le) cpu_type=sh endian=little ;;
sh*) cpu_type=sh endian=big ;;
sparc64* | sparcv9*) cpu_type=sparc arch=v9-64 ;;
sparc86x*) cpu_type=sparc arch=sparc86x ;;
sparclet*) cpu_type=sparc arch=sparclet ;;
sparclite*) cpu_type=sparc arch=sparclite ;;
sparc*) cpu_type=sparc arch=sparclite ;; # ??? See tc-sparc.c.
tilegx*be) cpu_type=tilegx endian=big ;;
tilegx*) cpu_type=tilegx endian=little ;;
v850*) cpu_type=v850 ;;
visium) cpu_type=visium endian=big ;;
wasm32) cpu_type=wasm32 endian=little ;;
x86_64*) cpu_type=i386 arch=x86_64;;
xgate) cpu_type=xgate ;;
xtensa*) cpu_type=xtensa arch=xtensa ;;
*) cpu_type=${cpu} ;;
esac
# Assign object format. Set fmt, em, and bfd_gas.
generic_target=${cpu_type}-$vendor-$os
# Note: This table is alpha-sorted, please try to keep it that way.
case ${generic_target} in
aarch64*-*-elf*) fmt=elf;;
aarch64*-*-fuchsia*) fmt=elf;;
aarch64*-*-linux*) fmt=elf em=linux
case ${cpu}-${os} in
aarch64*-linux-gnu_ilp32) arch=aarch64:32 ;;
esac ;;
aarch64*-*-netbsd*) fmt=elf em=nbsd;;
alpha-*-*vms*) fmt=evax ;;
alpha-*-osf*) fmt=ecoff ;;
alpha-*-linux*ecoff*) fmt=ecoff ;;
alpha-*-linux-*) fmt=elf em=linux ;;
alpha-*-netbsd* | alpha-*-openbsd*) fmt=elf em=nbsd ;;
arc-*-elf*) fmt=elf ;;
arc*-*-linux*) fmt=elf bfd_gas=yes ;;
arm-*-phoenix*) fmt=elf ;;
arm-*-elf) fmt=elf ;;
arm-*-eabi* | arm-*-rtems*) fmt=elf em=armeabi ;;
arm-*-symbianelf*) fmt=elf em=symbian ;;
arm-*-kaos*) fmt=elf ;;
arm-*-conix*) fmt=elf ;;
arm-*-freebsd[89].* | armeb-*-freebsd[89].*)
fmt=elf em=freebsd ;;
arm-*-freebsd* | armeb-*-freebsd*) fmt=elf em=armfbsdeabi ;;
arm*-*-freebsd*) fmt=elf em=armfbsdvfp ;;
arm-*-linux-*eabi*) fmt=elf em=armlinuxeabi ;;
arm-*-linux-*) fmt=elf em=linux ;;
arm-*-uclinux*eabi*) fmt=elf em=armlinuxeabi ;;
arm-*-uclinux*) fmt=elf em=linux ;;
arm-*-nacl*) fmt=elf em=nacl ;;
arm-*-netbsdelf*) fmt=elf em=nbsd ;;
arm-*-nto*) fmt=elf ;;
arm-wince-pe | arm-*-wince | arm*-*-mingw32ce* | arm*-*-cegcc*)
fmt=coff em=wince-pe ;;
arm-*-pe) fmt=coff em=pe ;;
arm-*-fuchsia*) fmt=elf ;;
avr-*-*) fmt=elf bfd_gas=yes ;;
bfin-*-linux-uclibc) fmt=fdpicelf em=linux ;;
bfin-*-uclinux*) fmt=elf em=linux ;;
bfin-*elf) fmt=elf ;;
cr16-*-elf*) fmt=elf ;;
cris-*-linux-* | crisv32-*-linux-*)
fmt=multi em=linux ;;
cris-*-* | crisv32-*-*) fmt=multi ;;
crx-*-elf*) fmt=elf ;;
csky-*-elf*abiv1) fmt=elf em=csky_abiv1 ;;
csky-*-elf*) fmt=elf em=csky_abiv2 ;;
csky-*-linux*abiv1) fmt=elf em=csky_abiv1_linux ;;
csky-*-linux*) fmt=elf em=csky_abiv2_linux ;;
d10v-*-*) fmt=elf ;;
d30v-*-*) fmt=elf ;;
dlx-*-*) fmt=elf ;;
bpf-*-*) fmt=elf ;;
epiphany-*-*) fmt=elf ;;
fr30-*-*) fmt=elf ;;
frv-*-*linux*) fmt=elf em=linux;;
frv-*-*) fmt=elf ;;
ft32-*-*) fmt=elf ;;
hppa-*-linux*)
case ${cpu} in
hppa*64*) fmt=elf em=hppalinux64 ;;
hppa*) fmt=elf em=linux ;;
esac ;;
hppa-*-*elf*) fmt=elf em=hppa ;;
hppa-*-lites*) fmt=elf em=hppa ;;
hppa-*-netbsd*) fmt=elf em=nbsd ;;
hppa-*-openbsd*) fmt=elf em=hppa ;;
hppa-*-osf*) fmt=som em=hppa ;;
hppa-*-hpux11*)
case ${cpu} in
hppa*64*) fmt=elf em=hppa64 ;;
hppa*) fmt=som em=hppa ;;
esac ;;
hppa-*-hpux*) fmt=som em=hppa ;;
hppa-*-mpeix*) fmt=som em=hppa ;;
hppa-*-bsd*) fmt=som em=hppa ;;
hppa-*-hiux*) fmt=som em=hppa ;;
h8300-*-elf) fmt=elf ;;
h8300-*-linux*) fmt=elf em=linux ;;
i386-*-beospe*) fmt=coff em=pe ;;
i386-*-beos*) fmt=elf ;;
i386-*-elfiamcu) fmt=elf arch=iamcu ;;
i386-*-elf*) fmt=elf ;;
i386-*-fuchsia*) fmt=elf ;;
i386-*-bsd*) fmt=aout em=386bsd ;;
i386-*-netbsdpe*) fmt=coff em=pe ;;
i386-*-netbsd*-gnu* | \
i386-*-knetbsd*-gnu | \
i386-*-netbsd* | \
i386-*-openbsd*) fmt=elf em=nbsd ;;
i386-*-linux-*) fmt=elf em=linux
case ${cpu}-${os} in
x86_64*-linux-gnux32) arch=x86_64:32 ;;
esac ;;
i386-*-lynxos*) fmt=elf em=lynx ;;
i386-*-redox*) fmt=elf ;;
i386-*-solaris*) fmt=elf em=solaris ;;
i386-*-freebsd* \
| i386-*-kfreebsd*-gnu) fmt=elf em=freebsd ;;
i386-*-msdosdjgpp* \
| i386-*-go32*) fmt=coff em=go32 ;;
i386-*-gnu*) fmt=elf em=gnu ;;
i386-*-msdos*) fmt=aout ;;
i386-*-moss*) fmt=elf ;;
i386-*-pe) fmt=coff em=pe ;;
i386-*-cygwin*)
case ${cpu} in
x86_64*) fmt=coff em=pep ;;
i*) fmt=coff em=pe ;;
esac ;;
i386-*-interix*) fmt=coff em=interix ;;
i386-*-mingw*)
case ${cpu} in
x86_64*) fmt=coff em=pep ;;
i*) fmt=coff em=pe ;;
esac ;;
i386-*-nto-qnx*) fmt=elf ;;
i386-*-*nt*) fmt=coff em=pe ;;
i386-*-rdos*) fmt=elf ;;
i386-*-darwin*) fmt=macho ;;
ia16-*-elf*) fmt=elf ;;
ia64-*-elf*) fmt=elf ;;
ia64-*-*vms*) fmt=elf em=vms ;;
ia64-*-aix*) fmt=elf em=ia64aix ;;
ia64-*-linux-*) fmt=elf em=linux ;;
ia64-*-hpux*) fmt=elf em=hpux ;;
ia64-*-netbsd*) fmt=elf em=nbsd ;;
ip2k-*-*) fmt=elf ;;
iq2000-*-elf) fmt=elf ;;
lm32-*-*) fmt=elf ;;
m32c-*-elf) fmt=elf ;;
m32r-*-elf*) fmt=elf ;;
m32r-*-linux*) fmt=elf em=linux;;
m68hc11-*-* | m6811-*-*) fmt=elf ;;
m68hc12-*-* | m6812-*-*) fmt=elf ;;
m68k-*-elf*) fmt=elf ;;
m68k-*-sysv4*) fmt=elf em=svr4 ;;
m68k-*-linux-*) fmt=elf em=linux ;;
m68k-*-uclinux*) fmt=elf em=uclinux ;;
m68k-*-gnu*) fmt=elf ;;
m68k-*-netbsdelf*) fmt=elf em=nbsd ;;
s12z-*-*) fmt=elf ;;
mep-*-elf) fmt=elf ;;
metag-*-elf) fmt=elf ;;
metag-*-linux*) fmt=elf em=linux ;;
mcore-*-elf) fmt=elf ;;
mcore-*-pe) fmt=coff em=pe bfd_gas=yes ;;
microblaze-*-*) fmt=elf ;;
mips-*-irix6*) fmt=elf em=irix ;;
mips-*-irix5*) fmt=elf em=irix ;;
mips*-*-linux*) fmt=elf em=tmips ;;
mips*-*-freebsd* | mips*-*-kfreebsd*-gnu)
fmt=elf em=freebsd ;;
mips-*-sysv4* | mips-*-gnu*) fmt=elf em=tmips ;;
mips*-sde-elf* | mips*-mti-elf* | mips*-img-elf*)
fmt=elf em=tmips ;;
mips-*-elf*) fmt=elf ;;
mips-*-netbsd*) fmt=elf em=tmips ;;
mips-*-openbsd*) fmt=elf em=tmips ;;
mips-*-windiss) fmt=elf ;;
mmix-*-*) fmt=elf ;;
mn10200-*-*) fmt=elf ;;
# cpu_type for am33_2.0 is set to mn10300
mn10300-*-linux*) fmt=elf em=linux ;;
mn10300-*-*) fmt=elf ;;
moxie-*-uclinux) fmt=elf em=linux ;;
moxie-*-moxiebox*) fmt=elf endian=little ;;
moxie-*-*) fmt=elf ;;
mt-*-elf) fmt=elf bfd_gas=yes ;;
msp430-*-*) fmt=elf ;;
nds32-*-elf*) fmt=elf ;;
nds32-*-linux*) fmt=elf em=linux ;;
nios2*-linux*) fmt=elf em=linux ;;
ns32k-pc532-mach*) fmt=aout em=pc532mach ;;
ns32k-pc532-ux*) fmt=aout em=pc532mach ;;
ns32k-pc532-lites*) fmt=aout em=nbsd532 ;;
ns32k-*-*n*bsd*) fmt=aout em=nbsd532 ;;
or1k*-*-elf | or1k*-*-rtems*) fmt=elf endian=big ;;
or1k*-*-linux*) fmt=elf em=linux endian=big ;;
pj*) fmt=elf ;;
ppc-*-aix5.[01]) fmt=coff em=aix5 ;;
ppc-*-aix[5-9].*) fmt=coff em=aix5 ;;
ppc-*-aix*) fmt=coff em=aix ;;
ppc-*-beos*) fmt=coff ;;
ppc-*-*n*bsd* | ppc-*-elf*) fmt=elf ;;
ppc-*-eabi* | ppc-*-sysv4*) fmt=elf ;;
ppc-*-linux-*) fmt=elf em=linux ;;
ppc-*-solaris*) fmt=elf em=solaris ;;
ppc-*-macos*) fmt=coff em=macos ;;
ppc-*-nto*) fmt=elf ;;
ppc-*-kaos*) fmt=elf ;;
pru-*-*) fmt=elf ;;
riscv*-*-*) fmt=elf ;;
rx-*-linux*) fmt=elf em=linux ;;
s390-*-linux-*) fmt=elf em=linux ;;
s390-*-tpf*) fmt=elf ;;
score-*-elf) fmt=elf ;;
sh*-*-linux*) fmt=elf em=linux
case ${cpu} in
sh*eb) endian=big ;;
*) endian=little ;;
esac ;;
sh*-*-netbsdelf*) fmt=elf em=nbsd
case ${cpu} in
sh*l*) endian=little ;;
*) endian=big ;;
esac ;;
sh-*-elf*) fmt=elf ;;
sh-*-uclinux* | sh[12]-*-uclinux*) fmt=elf em=uclinux ;;
sh-*-coff*) fmt=coff ;;
sh-*-nto*) fmt=elf ;;
sh-*-pe*) fmt=coff em=pe endian=little ;;
sh-*-kaos*) fmt=elf ;;
shle*-*-kaos*) fmt=elf ;;
sparc-*-linux-*) fmt=elf em=linux ;;
sparc-*-solaris*) fmt=elf em=solaris ;;
sparc-*-freebsd*) fmt=elf em=freebsd ;;
sparc-*-*bsd*) fmt=elf em=nbsd ;;
spu-*-elf) fmt=elf ;;
tic30-*-*coff*) fmt=coff bfd_gas=yes ;;
tic4x-*-* | c4x-*-*) fmt=coff bfd_gas=yes ;;
tic54x-*-* | c54x*-*-*) fmt=coff bfd_gas=yes need_libm=yes;;
tic6x-*-*) fmt=elf ;;
tilepro-*-* | tilegx*-*-*) fmt=elf ;;
v850*-*-*) fmt=elf ;;
vax-*-netbsdelf*) fmt=elf em=nbsd ;;
vax-*-linux-*) fmt=elf em=linux ;;
visium-*-elf) fmt=elf ;;
wasm32-*-*) fmt=elf ;;
xstormy16-*-*) fmt=elf ;;
xgate-*-*) fmt=elf ;;
xtensa*-*-*) fmt=elf ;;
z80-*-coff) fmt=coff ;;
z8k-*-coff | z8k-*-sim) fmt=coff ;;
*-*-aout | *-*-scout) fmt=aout ;;
*-*-cloudabi*) fmt=elf em=cloudabi ;;
*-*-dragonfly*) fmt=elf em=dragonfly ;;
*-*-freebsd* | *-*-kfreebsd*-gnu) fmt=elf em=freebsd ;;
*-*-generic) fmt=generic ;;
*-*-xray | *-*-hms) fmt=coff ;;
*-*-sim) fmt=coff ;;
*-*-elf | *-*-rtems* | *-*-sysv4*) fmt=elf ;;
*-*-solaris*) fmt=elf em=solaris ;;
*-*-aros*) fmt=elf em=linux ;;
*-*-vxworks* | *-*-windiss) fmt=elf em=vxworks ;;
esac
case ${cpu_type} in
aarch64 | alpha | arm | csky | i386 | ia64 | microblaze | mips | ns32k | \
or1k | or1knd | pdp11 | ppc | riscv | sh | sparc | z80 | z8k)
bfd_gas=yes
;;
esac
case ${fmt} in
elf | ecoff | fdpicelf | multi | som)
bfd_gas=yes
;;
esac
if test $bfd_gas != yes; then
echo This target is no longer supported in gas
exit 1
fi
case ${cpu_type}-${fmt}-${os} in
i386-elf-linux*)
# Default to compress DWARF debug sections for Linux/x86.
if test ${ac_default_compressed_debug_sections} = unset; then
ac_default_compressed_debug_sections=yes
fi
;;
esac