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// Copyright 2015 Google Inc. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package cc
import (
"fmt"
"strings"
"android/soong/common"
)
var (
armToolchainCflags = []string{
"-mthumb-interwork",
}
armCflags = []string{
"-fno-exceptions", // from build/core/combo/select.mk
"-Wno-multichar", // from build/core/combo/select.mk
"-msoft-float",
"-ffunction-sections",
"-fdata-sections",
"-funwind-tables",
"-fstack-protector-strong",
"-Wa,--noexecstack",
"-Werror=format-security",
"-D_FORTIFY_SOURCE=2",
"-fno-short-enums",
"-no-canonical-prefixes",
"-fno-canonical-system-headers",
"-fno-builtin-sin",
"-fno-strict-volatile-bitfields",
// TARGET_RELEASE_CFLAGS
"-DNDEBUG",
"-g",
"-Wstrict-aliasing=2",
"-fgcse-after-reload",
"-frerun-cse-after-loop",
"-frename-registers",
}
armCppflags = []string{
"-fvisibility-inlines-hidden",
}
armLdflags = []string{
"-Wl,-z,noexecstack",
"-Wl,-z,relro",
"-Wl,-z,now",
"-Wl,--build-id=md5",
"-Wl,--warn-shared-textrel",
"-Wl,--fatal-warnings",
"-Wl,--icf=safe",
"-Wl,--hash-style=gnu",
"-Wl,--no-undefined-version",
}
armArmCflags = []string{
"-O2",
"-fomit-frame-pointer",
"-fstrict-aliasing",
"-funswitch-loops",
}
armThumbCflags = []string{
"-mthumb",
"-Os",
"-fomit-frame-pointer",
"-fno-strict-aliasing",
}
armArchVariantCflags = map[string][]string{
"armv5te": []string{
"-march=armv5te",
"-mtune=xscale",
"-D__ARM_ARCH_5__",
"-D__ARM_ARCH_5T__",
"-D__ARM_ARCH_5E__",
"-D__ARM_ARCH_5TE__",
},
"armv7-a": []string{
"-march=armv7-a",
"-mfloat-abi=softfp",
"-mfpu=vfpv3-d16",
},
"armv7-a-neon": []string{
"-mfloat-abi=softfp",
"-mfpu=neon",
},
}
armCpuVariantCflags = map[string][]string{
"": []string{
"-march=armv7-a",
},
"cortex-a7": []string{
"-mcpu=cortex-a7",
// Fake an ARM compiler flag as these processors support LPAE which GCC/clang
// don't advertise.
// TODO This is a hack and we need to add it for each processor that supports LPAE until some
// better solution comes around. See Bug 27340895
"-D__ARM_FEATURE_LPAE=1",
},
"cortex-a8": []string{
"-mcpu=cortex-a8",
},
"cortex-a15": []string{
"-mcpu=cortex-a15",
// Fake an ARM compiler flag as these processors support LPAE which GCC/clang
// don't advertise.
// TODO This is a hack and we need to add it for each processor that supports LPAE until some
// better solution comes around. See Bug 27340895
"-D__ARM_FEATURE_LPAE=1",
},
}
armClangCpuVariantCflags = copyVariantFlags(armCpuVariantCflags)
armClangArchVariantCflags = copyVariantFlags(armArchVariantCflags)
)
const (
armGccVersion = "4.9"
)
func init() {
replaceFirst := func(slice []string, from, to string) {
if slice[0] != from {
panic(fmt.Errorf("Expected %q, found %q", from, to))
}
slice[0] = to
}
replaceFirst(armClangArchVariantCflags["armv5te"], "-march=armv5te", "-march=armv5t")
armClangCpuVariantCflags["krait"] = []string{
"-mcpu=krait",
"-mfpu=neon-vfpv4",
}
pctx.StaticVariable("armGccVersion", armGccVersion)
pctx.SourcePathVariable("armGccRoot",
"prebuilts/gcc/${HostPrebuiltTag}/arm/arm-linux-androideabi-${armGccVersion}")
pctx.StaticVariable("armGccTriple", "arm-linux-androideabi")
pctx.StaticVariable("armToolchainCflags", strings.Join(armToolchainCflags, " "))
pctx.StaticVariable("armCflags", strings.Join(armCflags, " "))
pctx.StaticVariable("armLdflags", strings.Join(armLdflags, " "))
pctx.StaticVariable("armCppflags", strings.Join(armCppflags, " "))
pctx.StaticVariable("armIncludeFlags", strings.Join([]string{
"-isystem ${LibcRoot}/arch-arm/include",
"-isystem ${LibcRoot}/include",
"-isystem ${LibcRoot}/kernel/uapi",
"-isystem ${LibcRoot}/kernel/uapi/asm-arm",
}, " "))
// Extended cflags
// ARM vs. Thumb instruction set flags
pctx.StaticVariable("armArmCflags", strings.Join(armArmCflags, " "))
pctx.StaticVariable("armThumbCflags", strings.Join(armThumbCflags, " "))
// Architecture variant cflags
pctx.StaticVariable("armArmv5TECflags", strings.Join(armArchVariantCflags["armv5te"], " "))
pctx.StaticVariable("armArmv7ACflags", strings.Join(armArchVariantCflags["armv7-a"], " "))
pctx.StaticVariable("armArmv7ANeonCflags", strings.Join(armArchVariantCflags["armv7-a-neon"], " "))
// Cpu variant cflags
pctx.StaticVariable("armGenericCflags", strings.Join(armCpuVariantCflags[""], " "))
pctx.StaticVariable("armCortexA7Cflags", strings.Join(armCpuVariantCflags["cortex-a7"], " "))
pctx.StaticVariable("armCortexA8Cflags", strings.Join(armCpuVariantCflags["cortex-a8"], " "))
pctx.StaticVariable("armCortexA15Cflags", strings.Join(armCpuVariantCflags["cortex-a15"], " "))
// Clang cflags
pctx.StaticVariable("armToolchainClangCflags", strings.Join(clangFilterUnknownCflags(armToolchainCflags), " "))
pctx.StaticVariable("armClangCflags", strings.Join(clangFilterUnknownCflags(armCflags), " "))
pctx.StaticVariable("armClangLdflags", strings.Join(clangFilterUnknownCflags(armLdflags), " "))
pctx.StaticVariable("armClangCppflags", strings.Join(clangFilterUnknownCflags(armCppflags), " "))
// Clang ARM vs. Thumb instruction set cflags
pctx.StaticVariable("armClangArmCflags", strings.Join(clangFilterUnknownCflags(armArmCflags), " "))
pctx.StaticVariable("armClangThumbCflags", strings.Join(clangFilterUnknownCflags(armThumbCflags), " "))
// Clang arch variant cflags
pctx.StaticVariable("armClangArmv5TECflags",
strings.Join(armClangArchVariantCflags["armv5te"], " "))
pctx.StaticVariable("armClangArmv7ACflags",
strings.Join(armClangArchVariantCflags["armv7-a"], " "))
pctx.StaticVariable("armClangArmv7ANeonCflags",
strings.Join(armClangArchVariantCflags["armv7-a-neon"], " "))
// Clang cpu variant cflags
pctx.StaticVariable("armClangGenericCflags",
strings.Join(armClangCpuVariantCflags[""], " "))
pctx.StaticVariable("armClangCortexA7Cflags",
strings.Join(armClangCpuVariantCflags["cortex-a7"], " "))
pctx.StaticVariable("armClangCortexA8Cflags",
strings.Join(armClangCpuVariantCflags["cortex-a8"], " "))
pctx.StaticVariable("armClangCortexA15Cflags",
strings.Join(armClangCpuVariantCflags["cortex-a15"], " "))
pctx.StaticVariable("armClangKraitCflags",
strings.Join(armClangCpuVariantCflags["krait"], " "))
}
var (
armArchVariantCflagsVar = map[string]string{
"armv5te": "${armArmv5TECflags}",
"armv7-a": "${armArmv7ACflags}",
"armv7-a-neon": "${armArmv7ANeonCflags}",
}
armCpuVariantCflagsVar = map[string]string{
"": "${armGenericCflags}",
"cortex-a7": "${armCortexA7Cflags}",
"cortex-a8": "${armCortexA8Cflags}",
"cortex-a15": "${armCortexA15Cflags}",
"cortex-a53": "${armCortexA7Cflags}",
"cortex-a53.a57": "${armCortexA7Cflags}",
"krait": "${armCortexA15Cflags}",
"denver": "${armCortexA15Cflags}",
}
armClangArchVariantCflagsVar = map[string]string{
"armv5te": "${armClangArmv5TECflags}",
"armv7-a": "${armClangArmv7ACflags}",
"armv7-a-neon": "${armClangArmv7ANeonCflags}",
}
armClangCpuVariantCflagsVar = map[string]string{
"": "${armClangGenericCflags}",
"cortex-a7": "${armClangCortexA7Cflags}",
"cortex-a8": "${armClangCortexA8Cflags}",
"cortex-a15": "${armClangCortexA15Cflags}",
"cortex-a53": "${armClangCortexA7Cflags}",
"cortex-a53.a57": "${armClangCortexA7Cflags}",
"krait": "${armClangKraitCflags}",
"denver": "${armClangCortexA15Cflags}",
}
)
type toolchainArm struct {
toolchain32Bit
ldflags string
toolchainCflags, toolchainClangCflags string
}
func (t *toolchainArm) Name() string {
return "arm"
}
func (t *toolchainArm) GccRoot() string {
return "${armGccRoot}"
}
func (t *toolchainArm) GccTriple() string {
return "${armGccTriple}"
}
func (t *toolchainArm) GccVersion() string {
return armGccVersion
}
func (t *toolchainArm) ToolchainCflags() string {
return t.toolchainCflags
}
func (t *toolchainArm) Cflags() string {
return "${armCflags}"
}
func (t *toolchainArm) Cppflags() string {
return "${armCppflags}"
}
func (t *toolchainArm) Ldflags() string {
return t.ldflags
}
func (t *toolchainArm) IncludeFlags() string {
return "${armIncludeFlags}"
}
func (t *toolchainArm) InstructionSetFlags(isa string) (string, error) {
switch isa {
case "arm":
return "${armArmCflags}", nil
case "thumb", "":
return "${armThumbCflags}", nil
default:
return t.toolchainBase.InstructionSetFlags(isa)
}
}
func (t *toolchainArm) ClangTriple() string {
return "${armGccTriple}"
}
func (t *toolchainArm) ToolchainClangCflags() string {
return t.toolchainClangCflags
}
func (t *toolchainArm) ClangCflags() string {
return "${armClangCflags}"
}
func (t *toolchainArm) ClangCppflags() string {
return "${armClangCppflags}"
}
func (t *toolchainArm) ClangLdflags() string {
return t.ldflags
}
func (t *toolchainArm) ClangInstructionSetFlags(isa string) (string, error) {
switch isa {
case "arm":
return "${armClangArmCflags}", nil
case "thumb", "":
return "${armClangThumbCflags}", nil
default:
return t.toolchainBase.ClangInstructionSetFlags(isa)
}
}
func armToolchainFactory(arch common.Arch) Toolchain {
var fixCortexA8 string
toolchainCflags := make([]string, 2, 3)
toolchainClangCflags := make([]string, 2, 3)
toolchainCflags[0] = "${armToolchainCflags}"
toolchainCflags[1] = armArchVariantCflagsVar[arch.ArchVariant]
toolchainClangCflags[0] = "${armToolchainClangCflags}"
toolchainClangCflags[1] = armClangArchVariantCflagsVar[arch.ArchVariant]
switch arch.ArchVariant {
case "armv7-a-neon":
switch arch.CpuVariant {
case "cortex-a8", "":
// Generic ARM might be a Cortex A8 -- better safe than sorry
fixCortexA8 = "-Wl,--fix-cortex-a8"
default:
fixCortexA8 = "-Wl,--no-fix-cortex-a8"
}
toolchainCflags = append(toolchainCflags,
variantOrDefault(armCpuVariantCflagsVar, arch.CpuVariant))
toolchainClangCflags = append(toolchainClangCflags,
variantOrDefault(armClangCpuVariantCflagsVar, arch.CpuVariant))
case "armv7-a":
fixCortexA8 = "-Wl,--fix-cortex-a8"
case "armv5te":
// Nothing extra for armv5te
default:
panic(fmt.Sprintf("Unknown ARM architecture version: %q", arch.ArchVariant))
}
return &toolchainArm{
toolchainCflags: strings.Join(toolchainCflags, " "),
ldflags: strings.Join([]string{
"${armLdflags}",
fixCortexA8,
}, " "),
toolchainClangCflags: strings.Join(toolchainClangCflags, " "),
}
}
func init() {
registerDeviceToolchainFactory(common.Arm, armToolchainFactory)
}