libpayload: update xcompile script

Copy from coreboot. at some point it probably should just reuse coreboot's
version.

Change-Id: Iee905a9060983ff85e2e70bde69a221c64a07cbc
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Reviewed-on: http://review.coreboot.org/10756
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>

1 files changed, 210 insertions, 107 deletions

diff --git a/payloads/libpayload/util/xcompile/xcompile b/payloads/libpayload/util/xcompile/xcompile
index 859688c..1af02ad 100644
--- a/payloads/libpayload/util/xcompile/xcompile
+++ b/payloads/libpayload/util/xcompile/xcompile
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 #
 # This file is part of the coreboot project.
 #
@@ -20,6 +20,7 @@
 #
 
 TMPFILE=""
+XGCCPATH=${1:-"`pwd`/util/crossgcc/xgcc/bin/"}
 
 die() {
 	echo "ERROR: $*" >&2
@@ -32,46 +33,78 @@ clean_up() {
 	fi
 }
 
+# Create temporary file(s).
+TMPFILE="$(mktemp /tmp/temp.XXXX 2>/dev/null || echo /tmp/temp.78gOIUGz)"
+touch "$TMPFILE"
+trap clean_up EXIT
+
+
 program_exists() {
 	type "$1" >/dev/null 2>&1
 }
 
+
+if [ "$(${XGCCPATH}/iasl 2>/dev/null | grep -c ACPI)" -gt 0 ]; then
+	IASL=${XGCCPATH}iasl
+elif [ "$(iasl 2>/dev/null | grep -c ACPI)" -gt 0 ]; then
+	IASL=iasl
+else
+	die "no iasl found"
+fi
+
+if program_exists gcc; then
+	HOSTCC=gcc
+elif program_exists cc; then
+	HOSTCC=cc
+else
+	die "no host compiler found"
+fi
+
+cat <<EOF
+# platform agnostic and host tools
+IASL:=${IASL}
+HOSTCC?=${HOSTCC}
+
+EOF
+
 testcc() {
 	local tmp_c="$TMPFILE.c"
 	local tmp_o="$TMPFILE.o"
 	rm -f "$tmp_c" "$tmp_o"
-	echo "_start(void) {}" >"$tmp_c"
-	"$1" -nostdinc -nostdlib -Werror $2 "$tmp_c" -o "$tmp_o" >/dev/null 2>&1
+	echo "void _start(void) {}" >"$tmp_c"
+	"$1" -nostdlib -Werror $2 "$tmp_c" -o "$tmp_o" >/dev/null 2>&1
 }
 
 testas() {
-	local gccprefixes="$1"
+	local gccprefix="$1"
 	local twidth="$2"
 	local arch="$3"
 	local use_dash_twidth="$4"
+	local endian="$5"
 	local obj_file="$TMPFILE.o"
 	local full_arch="elf$twidth-$arch"
 
 	rm -f "$obj_file"
 	[ -n "$use_dash_twidth" ] && use_dash_twidth="--$twidth"
-	${gccprefixes}as $use_dash_twidth -o "$obj_file" $TMPFILE 2>/dev/null ||
-		return 1
+	[ -n "$endian" ] && endian="-$endian"
+	${gccprefix}as $use_dash_twidth $endian -o "$obj_file" $TMPFILE \
+		2>/dev/null || return 1
 
 	# Check output content type.
-	local obj_type="$(${gccprefixes}objdump -p $obj_file)"
+	local obj_type="$(${gccprefix}objdump -p $obj_file)"
 	local obj_arch="$(expr "$obj_type" : '.*format \(.[a-z0-9-]*\)')"
 	[ "$obj_arch" = "$full_arch" ] || return 1
 
 	# Architecture matched.
-	GCCPREFIX="$gccprefixes"
+	GCCPREFIX="$gccprefix"
 
-	if [ -z "$use_dash_twidth" ]; then
-		ASFLAGS=""
-		CFLAGS=""
-		LDFLAGS=""
-	else
+	unset ASFLAGS LDFLAGS
+	unset CFLAGS_GCC CFLAGS_CLANG
+
+	if [ -n "$use_dash_twidth" ]; then
 		ASFLAGS="--$twidth"
-		CFLAGS="-m$twidth"
+		CFLAGS_GCC="-m$twidth"
+		CFLAGS_CLANG="-m$twidth"
 		LDFLAGS="-b $full_arch"
 
 	fi
@@ -80,7 +113,8 @@ testas() {
 	[ -n "$use_dash_twidth" ] && case "$full_arch" in
 		"elf32-i386" )
 			LDFLAGS="$LDFLAGS -melf_i386"
-			CFLAGS="$CFLAGS -Wl,-b,elf32-i386 -Wl,-melf_i386"
+			CFLAGS_GCC="$CFLAGS_GCC -Wl,-b,elf32-i386 -Wl,-melf_i386"
+			CFLAGS_CLANG="$CFLAGS_GCC -Wl,-b,elf32-i386 -Wl,-melf_i386"
 			;;
 	esac
 
@@ -91,94 +125,160 @@ detect_special_flags() {
 	local architecture="$1"
 	# GCC 4.6 is much more picky about unused variables.
 	# Turn off it's warnings for now:
-	testcc "$CC"   "$CFLAGS -Wno-unused-but-set-variable " &&
-		CFLAGS="$CFLAGS -Wno-unused-but-set-variable "
+	testcc "$GCC"      "$CFLAGS_GCC -Wno-unused-but-set-variable " &&
+		CFLAGS_GCC="$CFLAGS_GCC -Wno-unused-but-set-variable "
+
+	# Check for an operational -m32/-m64
+	testcc "$GCC"      "$CFLAGS_GCC -m$TWIDTH " &&
+		CFLAGS_GCC="$CFLAGS_GCC -m$TWIDTH "
 
 	# Use bfd linker instead of gold if available:
-	testcc "$CC"   "$CFLAGS -fuse-ld=bfd" &&
-		CFLAGS="$CFLAGS -fuse-ld=bfd" && LINKER_SUFFIX='.bfd'
+	testcc "$GCC"      "$CFLAGS_GCC -fuse-ld=bfd" &&
+		CFLAGS_GCC="$CFLAGS_GCC -fuse-ld=bfd" && LINKER_SUFFIX='.bfd'
 
-	testcc "$CC"   "$CFLAGS -Wa,--divide" &&
-		CFLAGS="$CFLAGS -Wa,--divide"
-	testcc "$CC"   "$CFLAGS -fno-stack-protector"&&
-		CFLAGS="$CFLAGS -fno-stack-protector"
-	testcc "$CC"   "$CFLAGS -Wl,--build-id=none" &&
-		CFLAGS="$CFLAGS -Wl,--build-id=none"
+	testcc "$GCC"      "$CFLAGS_GCC -fno-stack-protector"&&
+		CFLAGS_GCC="$CFLAGS_GCC -fno-stack-protector"
+	testcc "$GCC"      "$CFLAGS_GCC -Wl,--build-id=none" &&
+		CFLAGS_GCC="$CFLAGS_GCC -Wl,--build-id=none"
 
 	case "$architecture" in
-		arm )
-			# testcc "$CC" "$CFLAGS -mcpu=cortex-a9" &&
-			#	CFLAGS="$CFLAGS -mcpu=cortex-a9"
-			;;
-
-		arm64-generic )
-			;;
-		mips )
-			testcc "$CC" "CFLAGS -mxgot" &&
-				CFLAGS="$CFLAGS -mxgot"
-			;;
+	x86)
+		testcc "$GCC"      "$CFLAGS_GCC -Wa,--divide" &&
+			CFLAGS_GCC="$CFLAGS_GCC -Wa,--divide"
+		testcc "$CLANG"      "$CFLAGS_CLANG -Wa,--divide" &&
+			CFLAGS_CLANG="$CFLAGS_CLANG -Wa,--divide"
+		# Always build for i686 -- no sse/mmx instructions since SMM
+		# modules are compiled using these flags. Note that this
+		# doesn't prevent a project using xcompile to explicitly
+		# specify -mmsse, etc flags.
+		CFLAGS_GCC="$CFLAGS_GCC  -march=i686"
+		;;
+	x64)
+		testcc "$GCC"      "$CFLAGS_GCC -Wa,--divide" &&
+			CFLAGS_GCC="$CFLAGS_GCC -Wa,--divide"
+		testcc "$CLANG"      "$CFLAGS_CLANG -Wa,--divide" &&
+			CFLAGS_CLANG="$CFLAGS_CLANG -Wa,--divide"
+		;;
+	mipsel)
+		testcc "$GCC" "$CFLAGS_GCC -mno-abicalls -fno-pic" && \
+		  CFLAGS_GCC+=" -mno-abicalls -fno-pic"
+
+                # Enforce little endian mode.
+		testcc "$GCC" "$CFLAGS_GCC -EL" && \
+		  CFLAGS_GCC+=" -EL"
+		;;
 	esac
 }
 
+detect_compiler_runtime() {
+	test -z "$CLANG" || \
+	CC_RT_CLANG="`${CLANG} ${CFLAGS} -print-librt-file-name 2>/dev/null`"
+	test -z "$GCC" || \
+	CC_RT_GCC="`${GCC} ${CFLAGS} -print-libgcc-file-name`"
+}
+
 report_arch_toolchain() {
 	cat <<EOF
-# elf${TWIDTH}-${TBFDARCH} toolchain (${GCCPREFIX}gcc)
-CC_${TARCH}:=${GCCPREFIX}gcc ${CFLAGS}
+# elf${TWIDTH}-${TBFDARCH} toolchain (${GCC})
+ARCH_SUPPORTED+=${TARCH}
+SUBARCH_SUPPORTED+=${TSUPP-${TARCH}}
+ifeq (\$(CONFIG_COMPILER_GCC),y)
+CC_${TARCH}:=${GCC}
+CFLAGS_${TARCH}:=${CFLAGS_GCC}
+COMPILER_RT_${TARCH}:=${CC_RT_GCC}
+COMPILER_RT_FLAGS_${TARCH}:=${CC_RT_EXTRA_GCC}
+else
+CC_${TARCH}:=${CLANG}
+CFLAGS_${TARCH}:=${CFLAGS_CLANG}
+CFLAGS_${TARCH}+=-no-integrated-as -Qunused-arguments -m${TWIDTH}
+# tone down compiler warnings
+CFLAGS_${TARCH}+=-Wno-unused-variable -Wno-unused-function -Wno-tautological-compare -Wno-shift-overflow
+COMPILER_RT_${TARCH}:=${CC_RT_CLANG}
+COMPILER_RT_FLAGS_${TARCH}:=${CC_RT_EXTRA_CLANG}
+endif
+CPP_${TARCH}:=${GCCPREFIX}cpp
 AS_${TARCH}:=${GCCPREFIX}as ${ASFLAGS}
-LD_${TARCH}:=${GCCPREFIX}ld ${LDFLAGS}
+LD_${TARCH}:=${GCCPREFIX}ld${LINKER_SUFFIX} ${LDFLAGS}
 NM_${TARCH}:=${GCCPREFIX}nm
 OBJCOPY_${TARCH}:=${GCCPREFIX}objcopy
 OBJDUMP_${TARCH}:=${GCCPREFIX}objdump
 READELF_${TARCH}:=${GCCPREFIX}readelf
 STRIP_${TARCH}:=${GCCPREFIX}strip
 AR_${TARCH}:=${GCCPREFIX}ar
+CROSS_COMPILE_${TARCH}:=${GCCPREFIX}
 
 EOF
 }
 
-# Create temporary file(s).
-TMPFILE="$(mktemp /tmp/temp.XXXX 2>/dev/null || echo /tmp/temp.78gOIUGz)"
-touch "$TMPFILE"
-trap clean_up EXIT
+# Architecture definitions
+SUPPORTED_ARCHITECTURES="arm arm64 mipsel riscv x64 x86"
 
-# Architecture definition
-SUPPORTED_ARCHITECTURE="arm arm64 mipsel x86"
+arch_config_arm() {
+	TARCH="arm"
+	TBFDARCHS="littlearm"
+	TCLIST="armv7a armv7-a"
+	TWIDTH="32"
+	TSUPP="arm armv4 armv7 armv7_m"
+	TABI="eabi"
+}
 
-# ARM Architecture
-TARCH_arm="arm"
-TBFDARCH_arm="littlearm"
-TCLIST_arm="armv7a armv7-a"
-TWIDTH_arm="32"
+arch_config_arm64() {
+	TARCH="arm64"
+	TBFDARCHS="littleaarch64"
+	TCLIST="aarch64"
+	TWIDTH="64"
+	TSUPP="arm64 armv8_64"
+	TABI="elf"
+}
 
-# ARM64 Architecture
-TARCH_arm64="arm64"
-TBFDARCH_arm64="littleaarch64"
-TCLIST_arm64="aarch64"
-TWIDTH_arm64="64"
+arch_config_riscv() {
+	TARCH="riscv"
+	TBFDARCHS="littleriscv"
+	TCLIST="riscv"
+	TWIDTH="64"
+	TABI="elf"
+}
 
-# MIPS Architecture (Little Endian)
-TARCH_mipsel="mipsel"
-TBFDARCH_mipsel="tradlittlemips littlemips"
-TCLIST_mipsel="mipsel"
-TWIDTH_mipsel="32"
+arch_config_x64() {
+	TARCH="x86_64"
+	TBFDARCHS="x86-64"
+	TCLIST="x86_64"
+	TWIDTH="64"
+	TABI="elf"
+}
 
-# X86 Architecture
-TARCH_x86="i386"
-TBFDARCH_x86="i386"
-TCLIST_x86="i386 x86_64"
-TWIDTH_x86="32"
+arch_config_x86() {
+	TARCH="x86_32"
+	TBFDARCHS="i386"
+	TCLIST="i386 x86_64"
+	TWIDTH="32"
+	TABI="elf"
+	CC_RT_EXTRA_GCC="--wrap __divdi3 --wrap __udivdi3 --wrap __moddi3 --wrap __umoddi3"
+}
 
-XGCCPATH=${1:-"`pwd`/../../util/crossgcc/xgcc/bin/"}
+arch_config_mipsel() {
+	TARCH="mips"
+	TBFDARCHS="tradlittlemips littlemips"
+	TCLIST="mipsel"
+	TWIDTH="32"
+	TSUPP="mips mipsel"
+	TABI="elf"
+	TENDIAN="EL"
+}
+
+test_architecture() {
+	local architecture=$1
+	local endian gccprefix search
 
-# This loops over all supported architectures.
-for architecture in $SUPPORTED_ARCHITECTURE; do
 	GCCPREFIX="invalid"
-	TARCH="$(eval echo \$TARCH_$architecture)"
-	TBFDARCHS="$(eval echo \$TBFDARCH_$architecture)"
-	TCLIST="$(eval echo \$TCLIST_$architecture)"
-	TWIDTH="$(eval echo \$TWIDTH_$architecture)"
-	[ -z "$TARCH" -o -z "$TCLIST" -o -z "$TWIDTH" ] &&
-		die "Missing architecture definition for $architecture."
+	unset TABI TARCH TBFDARCH TCLIST TENDIAN TSUPP TWIDTH
+	unset CC_RT_EXTRA_GCC CC_RT_EXTRA_CLANG
+	unset GCC CLANG
+	if type arch_config_$architecture > /dev/null; then
+		arch_config_$architecture
+	else
+		die "no architecture definition for $architecture"
+	fi
 
 	# To override toolchain, define CROSS_COMPILE_$arch or CROSS_COMPILE as
 	# environment variable.
@@ -187,48 +287,51 @@ for architecture in $SUPPORTED_ARCHITECTURE; do
 	search="$(eval echo \$CROSS_COMPILE_$architecture 2>/dev/null)"
 	search="$search $CROSS_COMPILE"
 	for toolchain in $TCLIST; do
-		search="$search $XGCCPATH$toolchain-elf-"
-		search="$search $toolchain-elf-"
-		search="$search $XGCCPATH$toolchain-eabi-"
-		search="$search $toolchain-eabi-"
+		search="$search $XGCCPATH$toolchain-$TABI-"
+		search="$search $toolchain-$TABI-"
+		search="$search $toolchain-linux-gnu-"
+		search="$search $toolchain-"
 	done
 	echo "# $architecture TARCH_SEARCH=$search"
 
 	# Search toolchain by checking assembler capability.
 	for TBFDARCH in $TBFDARCHS; do
-		for gccprefixes in $search ""; do
-			program_exists "${gccprefixes}as" || continue
-			testas "$gccprefixes" "$TWIDTH" "$TBFDARCH" "" && break
-			testas "$gccprefixes" "$TWIDTH" "$TBFDARCH" "TRUE" && break
+		for gccprefix in $search ""; do
+			program_exists "${gccprefix}as" || continue
+			for endian in $TENDIAN ""; do
+				testas "$gccprefix" "$TWIDTH" "$TBFDARCH" \
+					"" "$endian" && break 3
+				testas "$gccprefix" "$TWIDTH" "$TBFDARCH" \
+					"TRUE" "$endian" && break 3
+			done
 		done
-		[ "$GCCPREFIX" = "invalid" ] || break
 	done
-
-	if [ "$GCCPREFIX" = "invalid" ]; then
-		echo "Warning: no suitable GCC for $architecture." >&2
-		continue
+	if [ "invalid" != "$GCCPREFIX" ]; then
+		GCC="${GCCPREFIX}gcc"
 	fi
-	CC="${GCCPREFIX}"gcc
 
-	detect_special_flags "$architecture"
-	report_arch_toolchain
-done
-
-if [ "$(${XGCCPATH}/iasl 2>/dev/null | grep -c ACPI)" -gt 0 ]; then
-	IASL=${XGCCPATH}iasl
-else
-	IASL=iasl
-fi
+	for clang_arch in $TCLIST invalid; do
+		testcc "clang" "-target ${clang_arch}-$TABI -c" && break
+	done
 
-if program_exists gcc; then
-	HOSTCC=gcc
-else
-	HOSTCC=cc
-fi
+	if [ "invalid" != "$clang_arch" ]; then
+		# FIXME: this may break in a clang && !gcc configuration,
+		# but that's more of a clang limitation. Let's be optimistic
+		# that this will change in the future.
+		CLANG="clang -target ${clang_arch}-${TABI} -ccc-gcc-name ${GCC}"
+	fi
 
-cat <<EOF
-IASL:=${IASL}
+	if [ -z "$GCC" -a -z "$CLANG" ]; then
+		echo "Warning: no suitable compiler for $architecture." >&2
+		return 1
+	fi
+}
 
-# native toolchain
-HOSTCC:=${HOSTCC}
-EOF
+# This loops over all supported architectures.
+for architecture in $SUPPORTED_ARCHITECTURES; do
+	if test_architecture $architecture; then
+		detect_special_flags "$architecture"
+		detect_compiler_runtime "$architecture"
+		report_arch_toolchain
+	fi
+done