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|
#!/bin/sh
#-
# SPDX-License-Identifier: BSD-2-Clause
#
# Copyright (c) 2022 SRI International
#
# This software was developed by SRI International and the University of
# Cambridge Computer Laboratory (Department of Computer Science and
# Technology) under Defense Advanced Research Projects Agency (DARPA)
# Contract No. HR001122C0110 ("ETC").
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.
#
LOCALBASE="%%LOCALBASE%%"
LLVM_PREFIX="%%LLVM_PREFIX%%"
LLVM_SUFFIX="%%LLVM_SUFFIX%%"
_TARGET=${_TARGET:-%%CONFIGURE_TARGET%%}
_SYSROOT=${_SYSROOT:-""}
VERBOSE=${VERBOSE:-0}
err()
{
ret=$1
shift
echo >&2 "$@"
exit "$ret"
}
debug()
{
if [ "$VERBOSE" -ne 0 ]; then
echo >&2 "$@"
fi
}
run()
{
debug "Running:" "$@"
"$@"
}
run_tool()
{
local tool=$1
shift
run env LD_LIBRARY_PATH="${LD_LIBRARY_PATH:+${LD_LIBRARY_PATH}:}${LLVM_PREFIX}/lib" \
"${LLVM_PREFIX}/bin/$tool" "$@"
}
set_sysroot()
{
local sysroot="$1"
# Clang doesn't seem to care if the sysroot exists, but we'll
# blow up trying to get __CheriBSD_version if it doesn't so require
# it to exist.
if [ ! -d "$sysroot" ]; then
err 1 "nonexistant sysroot: '$sysroot'"
fi
_SYSROOT="$sysroot"
}
set_target()
{
_TARGET="$1"
}
tool=$0
[ -L "$tool" ] && tool=$(/bin/realpath $tool)
tool=${tool##*/}
basetool=${tool%${LLVM_SUFFIX}}
next_arg_is_target=0
next_arg_is_sysroot=0
for arg in "$@"; do
if [ $next_arg_is_target -ne 0 ]; then
set_target "$arg"
next_arg_is_target=0
continue
fi
if [ $next_arg_is_sysroot -ne 0 ]; then
set_sysroot "$arg"
next_arg_is_sysroot=0
continue
fi
case "$arg" in
--sysroot)
next_arg_is_sysroot=1
;;
--sysroot=*)
set_sysroot "${arg#--sysroot=}"
;;
-target)
next_arg_is_target=1
;;
--target=*)
set_target "${arg#--target=}"
;;
esac
done
if [ $next_arg_is_target -ne 0 ]; then
err 1 "-target without target argument"
fi
if [ -z "$CHERIBSD_VERSION" -a -e "${_SYSROOT}/usr/include/sys/param.h" ]; then
CHERIBSD_VERSION=$(awk '/^#define[[:space:]]+__CheriBSD_version/{print $3}' ${_SYSROOT}/usr/include/sys/param.h)
fi
if [ -z "$CHERIBSD_VERSION" ]; then
CHERIBSD_VERSION=0
fi
arch_cflags=
arch_ldflags=
arch_objdump_flags=
# If we're targeting CheriBSD, assume we want to produce CHERI binaries
# (either hybrid or purecap) and choose which one based on the default
# libc in the sysroot. This isn't quite right, but isn't much worse
# than a misguided -mcpu flag.
if [ $CHERIBSD_VERSION -gt 0 ]; then
case "$_TARGET" in
aarch64-*-freebsd*|aarch64-freebsd*)
if run_tool llvm-readelf -h ${_SYSROOT}/lib/libc.so.7 | grep "Flags:.*purecap" >/dev/null; then
tls_flags=
vararg_flags=
codeptr_flags=
capreloc_flags=
if [ "$CHERIBSD_VERSION" -le 20220314 ]; then
tls_flags="-femulated-tls"
elif [ "$CHERIBSD_VERSION" -le 20220828 ]; then
vararg_flags="-Xclang -morello-vararg=new"
elif [ "$CHERIBSD_VERSION" -le 20230804 ]; then
vararg_flags="-Xclang -morello-vararg=new -Xclang -morello-bounded-memargs=caller-only"
else
vararg_flags="-Xclang -morello-vararg=new -Xclang -morello-bounded-memargs"
fi
if [ "$CHERIBSD_VERSION" -ge 20250127 ]; then
capreloc_flags="-Wl,--local-caprelocs=elf"
fi
if [ "$CHERIBSD_VERSION" -gt 20250127 ]; then
codeptr_flags=-cheri-codeptr-relocs
fi
# Some compiler invocations (e.g., "clang -v") don't
# consume -Xclang arguments which can lead to unused
# argument warnings so we supress them with
# --start/end-no-unused-arguments.
arch_cflags="-march=morello -mabi=purecap --start-no-unused-arguments $tls_flags $vararg_flags $capreloc_flags $codeptr_flags --end-no-unused-arguments"
arch_ldflags="$capreloc_flags $codeptr_flags"
arch_objdump_flags="--mattr=+morello"
else
vararg_flags=
if [ "$CHERIBSD_VERSION" -gt 20220314 ]; then
vararg_flags="-Xclang -morello-vararg=new"
fi
arch_cflags="-march=morello $vararg_flags"
arch_objdump_flags="--mattr=+morello"
fi
;;
riscv64-*-freebsd*|riscv64-freebsd*)
if run_tool llvm-readelf -h ${_SYSROOT}/lib/libc.so.7 | grep "Flags:.*cheriabi" >/dev/null; then
mabi=l64pc128d
else
mabi=lp64d
fi
arch_cflags="-march=rv64gcxcheri -mabi=$mabi -mno-relax"
;;
esac
arch_cflags="${arch_cflags} -Wno-implicit-int -Wno-implicit-function-declaration"
fi
case $basetool in
clang|clang++|clang-cpp)
toolflags=$arch_cflags
;;
ld.lld|ld64.lld)
toolflags=$arch_ldflags
;;
objdump)
toolflags=$arch_objdump_flags
;;
*)
debug no special args for $tool
;;
esac
run_tool "${basetool}" $toolflags "$@"
|
