This adds support for LLVM 3.8.x in LTO mode for IA32 and X64. CLANG38 enable LLVM Link Time Optimization (LTO) and code size optimization flag (-Oz) by default for aggressive code size improvement. CLANG38 X64 code is small code model + PIE.
CLANG LTO needs PIE in link flags to generate PIE code correctly, otherwise the PIE is not really enabled. (e.g. OvmfPkgX64 will hang in 64bits SEC at high address because of small model code displacement overflow). Test pass platforms: OVMF (OvmfPkgIa32.dsc, OvmfPkgX64.dsc and OvmfPkgIa32X64.dsc). Test compiler and linker version: LLVM 3.8, GNU ld 2.26. Example steps to use the CLANG38 tool chain to build OVMF platform: 1. Download and extract the llvm 3.8.0 Pre-Built Binaries from http://www.llvm.org/releases/ (e.g. http://www.llvm.org/releases/ 3.8.0/clang+llvm-3.8.0-x86_64-linux-gnu-ubuntu-16.04.tar.xz and extract it as ~/clang38). 2. Copy LLVMgold.so from https://github.com/shijunjing/edk2/blob/ llvm/BaseTools/Bin/LLVMgold.so to above clang lib folder (e.g. ~/clang38/lib/LLVMgold.so) 3. Install new version linker with plugin support (e.g. ld 2.26 in GNU Binutils 2.26 or Ubuntu16.04) $ cd edk2 $ git checkout llvm $ export CLANG38_BIN=path/to/your/clang38/ (e.g. export CLANG38_BIN=~/clang38/bin/) $ source edksetup.sh $ make -C BaseTools/Source/C $ build -t CLANG38 -a X64 -p OvmfPkg/OvmfPkgX64.dsc -n 5 -b DEBUG -DDEBUG_ON_SERIAL_PORT $ cd edk2/Build/OvmfX64/DEBUG_CLANG38/FV $ qemu-system-x86_64.exe -bios OVMF.fd -serial file:serial.log -m 4096 -hda fat:. If you want, you can build and install GNU Binutils 2.26 as below steps in Ubuntu: Download binutils-2.26 source code from http://ftp.gnu.org/gnu/binutils/ and extract it to ~/binutils-2.26 $sudo apt-get install bison $sudo apt-get install flex Install other necessary binutils build tools if missing $ mkdir build $ cd build $ ../binutils-2.26/configure --enable-gold --enable-plugins --disable-werror --prefix=/usr $ make -j 5 $ sudo make install If you want, you can build LLVMgold.so as below steps Download llvm-3.8.0 source code from http://www.llvm.org/releases/ 3.8.0/llvm-3.8.0.src.tar.xz and extract it to ~/llvm-3.8.0.src Download clang3.8.0 source code from http://www.llvm.org/releases/ 3.8.0/cfe-3.8.0.src.tar.xz and extract it to ~/llvm-3.8.0.src/tools/clang Refer http://clang.llvm.org/get_started.html to Install other necessary clang build tools if missing $ mkdir llvm38build $ cd llvm38build If your GNU Binutils 2.26 is in /home/jshi19/binutils-2.26, $ cmake ../llvm-3.8.0.src -G "Unix Makefiles" -DCMAKE_BUILD_TYPE="Release" -DLLVM_TARGETS_TO_BUILD="X86" -DCMAKE_VERBOSE_MAKEFILE=ON -DCMAKE_CXX_COMPILER="/usr/bin/g++" -DCMAKE_C_COMPILER="/usr/bin/gcc" -DLLVM_BINUTILS_INCDIR=/home/jshi19/binutils-2.26/include $ make -j 5 LLVMgold The LLVMgold.so is in ~/llvm38build/lib/LLVMgold.so Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Steven Shi <steven....@intel.com> --- BaseTools/Conf/tools_def.template | 87 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 87 insertions(+) mode change 100644 => 100755 BaseTools/Conf/tools_def.template diff --git a/BaseTools/Conf/tools_def.template b/BaseTools/Conf/tools_def.template old mode 100644 new mode 100755 index fd9eccb..6489039 --- a/BaseTools/Conf/tools_def.template +++ b/BaseTools/Conf/tools_def.template @@ -381,6 +381,12 @@ DEFINE SOURCERY_CYGWIN_TOOLS = /cygdrive/c/Program Files/CodeSourcery/Sourcery G # Required to build platforms or ACPI tables: # Intel(r) ACPI Compiler from # https://acpica.org/downloads +# CLANG38 -Linux- Requires: +# Clang v3.8 or later, LLVMgold plugin and GNU binutils 2.26 targeting x86_64-linux-gnu +# Optional: +# Required to build platforms or ACPI tables: +# Intel(r) ACPI Compiler from +# https://acpica.org/downloads # ELFGCC -Linux- Requires: # GCC(this tool chain uses whatever version of gcc and binutils that is installed in /usr/bin) # Optional: @@ -5428,6 +5434,87 @@ RELEASE_CLANG35_AARCH64_CC_FLAGS = DEF(CLANG35_AARCH64_CC_FLAGS) $(ARCHCC_FLAGS) #################################################################################### # +# Clang 3.8 - This configuration is used to compile under Linux to produce +# PE/COFF binaries using LLVM/Clang 3.8 with Link Time Optimization enabled +# +#################################################################################### +*_CLANG38_*_*_FAMILY = GCC +*_CLANG38_*_MAKE_PATH = make +*_CLANG38_*_*_DLL = ENV(CLANG38_DLL) +*_CLANG38_*_ASL_PATH = DEF(UNIX_IASL_BIN) + +*_CLANG38_*_APP_FLAGS = +*_CLANG38_*_ASL_FLAGS = DEF(IASL_FLAGS) +*_CLANG38_*_ASL_OUTFLAGS = DEF(IASL_OUTFLAGS) + +DEFINE CLANG38_IA32_PREFIX = ENV(CLANG38_BIN) +DEFINE CLANG38_X64_PREFIX = ENV(CLANG38_BIN) + +DEFINE CLANG38_IA32_TARGET = -target i686-pc-linux-gnu +DEFINE CLANG38_X64_TARGET = -target x86_64-pc-linux-gnu + +DEFINE CLANG38_ALL_CC_FLAGS = DEF(GCC44_ALL_CC_FLAGS) -Wno-empty-body -fno-stack-protector -fno-builtin -mms-bitfields -Wno-address -Wno-shift-negative-value -Wno-parentheses-equality -Wno-unknown-pragmas -Wno-tautological-constant-out-of-range-compare -Wno-incompatible-library-redeclaration -fno-asynchronous-unwind-tables -mno-sse -mno-mmx -msoft-float -mno-implicit-float -ftrap-function=undefined_behavior_has_been_optimized_away_by_clang -funsigned-char -fno-ms-extensions -Wno-null-dereference -Wno-tautological-compare + +########################### +# CLANG38 IA32 definitions +########################### +*_CLANG38_IA32_OBJCOPY_PATH = objcopy +*_CLANG38_IA32_CC_PATH = DEF(CLANG38_IA32_PREFIX)clang +*_CLANG38_IA32_SLINK_PATH = DEF(CLANG38_IA32_PREFIX)llvm-ar +*_CLANG38_IA32_DLINK_PATH = DEF(CLANG38_IA32_PREFIX)clang +*_CLANG38_IA32_ASLDLINK_PATH = DEF(CLANG38_IA32_PREFIX)clang +*_CLANG38_IA32_ASM_PATH = DEF(CLANG38_IA32_PREFIX)clang +*_CLANG38_IA32_PP_PATH = DEF(CLANG38_IA32_PREFIX)clang +*_CLANG38_IA32_VFRPP_PATH = DEF(CLANG38_IA32_PREFIX)clang +*_CLANG38_IA32_ASLCC_PATH = DEF(CLANG38_IA32_PREFIX)clang +*_CLANG38_IA32_ASLPP_PATH = DEF(CLANG38_IA32_PREFIX)clang +*_CLANG38_IA32_RC_PATH = objcopy + +*_CLANG38_IA32_ASLCC_FLAGS = DEF(GCC_ASLCC_FLAGS) -m32 -fno-lto DEF(CLANG38_IA32_TARGET) +*_CLANG38_IA32_ASLDLINK_FLAGS = DEF(GCC5_IA32_X64_ASLDLINK_FLAGS) -Wl,-m,elf_i386 +*_CLANG38_IA32_ASM_FLAGS = DEF(GCC5_ASM_FLAGS) -m32 -march=i386 DEF(CLANG38_IA32_TARGET) +DEBUG_CLANG38_IA32_CC_FLAGS = DEF(CLANG38_ALL_CC_FLAGS) -m32 -Oz -flto -march=i586 DEF(CLANG38_IA32_TARGET) -g +RELEASE_CLANG38_IA32_CC_FLAGS = DEF(CLANG38_ALL_CC_FLAGS) -m32 -Oz -flto -march=i586 DEF(CLANG38_IA32_TARGET) +*_CLANG38_IA32_DLINK_FLAGS = DEF(GCC5_IA32_X64_DLINK_FLAGS) -Wl,-Oz -Wl,-melf_i386 -Wl,--oformat=elf32-i386 +*_CLANG38_IA32_DLINK2_FLAGS = DEF(GCC5_IA32_DLINK2_FLAGS) +*_CLANG38_IA32_RC_FLAGS = DEF(GCC_IA32_RC_FLAGS) +*_CLANG38_IA32_OBJCOPY_FLAGS = +*_CLANG38_IA32_NASM_FLAGS = -f elf32 +*_CLANG38_IA32_PP_FLAGS = DEF(GCC_PP_FLAGS) DEF(CLANG38_IA32_TARGET) +*_CLANG38_IA32_ASLPP_FLAGS = DEF(GCC_ASLPP_FLAGS) DEF(CLANG38_IA32_TARGET) +*_CLANG38_IA32_VFRPP_FLAGS = DEF(GCC_VFRPP_FLAGS) DEF(CLANG38_IA32_TARGET) + +########################## +# CLANG38 X64 definitions +########################## +*_CLANG38_X64_OBJCOPY_PATH = objcopy +*_CLANG38_X64_CC_PATH = DEF(CLANG38_X64_PREFIX)clang +*_CLANG38_X64_SLINK_PATH = DEF(CLANG38_X64_PREFIX)llvm-ar +*_CLANG38_X64_DLINK_PATH = DEF(CLANG38_X64_PREFIX)clang +*_CLANG38_X64_ASLDLINK_PATH = DEF(CLANG38_X64_PREFIX)clang +*_CLANG38_X64_ASM_PATH = DEF(CLANG38_X64_PREFIX)clang +*_CLANG38_X64_PP_PATH = DEF(CLANG38_X64_PREFIX)clang +*_CLANG38_X64_VFRPP_PATH = DEF(CLANG38_X64_PREFIX)clang +*_CLANG38_X64_ASLCC_PATH = DEF(CLANG38_X64_PREFIX)clang +*_CLANG38_X64_ASLPP_PATH = DEF(CLANG38_X64_PREFIX)clang +*_CLANG38_X64_RC_PATH = objcopy + +*_CLANG38_X64_ASLCC_FLAGS = DEF(GCC_ASLCC_FLAGS) -m64 -fno-lto DEF(CLANG38_X64_TARGET) +*_CLANG38_X64_ASLDLINK_FLAGS = DEF(GCC5_IA32_X64_ASLDLINK_FLAGS) -Wl,-m,elf_x86_64 +*_CLANG38_X64_ASM_FLAGS = DEF(GCC5_ASM_FLAGS) -m64 DEF(CLANG38_X64_TARGET) +DEBUG_CLANG38_X64_CC_FLAGS = DEF(CLANG38_ALL_CC_FLAGS) -m64 "-DEFIAPI=__attribute__((ms_abi))" -mno-red-zone -mcmodel=small -fpie -Oz -flto DEF(CLANG38_X64_TARGET) -g +RELEASE_CLANG38_X64_CC_FLAGS = DEF(CLANG38_ALL_CC_FLAGS) -m64 "-DEFIAPI=__attribute__((ms_abi))" -mno-red-zone -mcmodel=small -fpie -Oz -flto DEF(CLANG38_X64_TARGET) +*_CLANG38_X64_DLINK_FLAGS = DEF(GCC5_IA32_X64_DLINK_FLAGS) -Wl,-Oz -Wl,-melf_x86_64 -Wl,--oformat=elf64-x86-64 -Wl,-pie -mcmodel=small +*_CLANG38_X64_DLINK2_FLAGS = DEF(GCC5_X64_DLINK2_FLAGS) +*_CLANG38_X64_RC_FLAGS = DEF(GCC_X64_RC_FLAGS) +*_CLANG38_X64_OBJCOPY_FLAGS = +*_CLANG38_X64_NASM_FLAGS = -f elf64 +*_CLANG38_X64_PP_FLAGS = DEF(GCC_PP_FLAGS) DEF(CLANG38_X64_TARGET) +*_CLANG38_X64_ASLPP_FLAGS = DEF(GCC_ASLPP_FLAGS) DEF(CLANG38_X64_TARGET) +*_CLANG38_X64_VFRPP_FLAGS = DEF(GCC_VFRPP_FLAGS) DEF(CLANG38_X64_TARGET) + +#################################################################################### +# # Cygwin GCC And Intel ACPI Compiler # #################################################################################### -- 2.7.4 _______________________________________________ edk2-devel mailing list edk2-devel@lists.01.org https://lists.01.org/mailman/listinfo/edk2-devel
