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1# SPDX-License-Identifier: GPL-2.02all:3 4include ../lib.mk5 6.PHONY: all all_32 all_64 warn_32bit_failure clean7 8UNAME_M := $(shell uname -m)9CAN_BUILD_I386 := $(shell ./check_cc.sh "$(CC)" trivial_32bit_program.c -m32)10CAN_BUILD_X86_64 := $(shell ./check_cc.sh "$(CC)" trivial_64bit_program.c)11CAN_BUILD_WITH_NOPIE := $(shell ./check_cc.sh "$(CC)" trivial_program.c -no-pie)12 13TARGETS_C_BOTHBITS := single_step_syscall sysret_ss_attrs syscall_nt test_mremap_vdso \14 check_initial_reg_state sigreturn iopl ioperm \15 test_vsyscall mov_ss_trap \16 syscall_arg_fault fsgsbase_restore sigaltstack17TARGETS_C_BOTHBITS += nx_stack18TARGETS_C_32BIT_ONLY := entry_from_vm86 test_syscall_vdso unwind_vdso \19 test_FCMOV test_FCOMI test_FISTTP \20 vdso_restorer21TARGETS_C_64BIT_ONLY := fsgsbase sysret_rip syscall_numbering \22 corrupt_xstate_header amx lam test_shadow_stack23# Some selftests require 32bit support enabled also on 64bit systems24TARGETS_C_32BIT_NEEDED := ldt_gdt ptrace_syscall25 26TARGETS_C_32BIT_ALL := $(TARGETS_C_BOTHBITS) $(TARGETS_C_32BIT_ONLY) $(TARGETS_C_32BIT_NEEDED)27TARGETS_C_64BIT_ALL := $(TARGETS_C_BOTHBITS) $(TARGETS_C_64BIT_ONLY)28ifeq ($(CAN_BUILD_I386)$(CAN_BUILD_X86_64),11)29TARGETS_C_64BIT_ALL += $(TARGETS_C_32BIT_NEEDED)30endif31 32BINARIES_32 := $(TARGETS_C_32BIT_ALL:%=%_32)33BINARIES_64 := $(TARGETS_C_64BIT_ALL:%=%_64)34 35BINARIES_32 := $(patsubst %,$(OUTPUT)/%,$(BINARIES_32))36BINARIES_64 := $(patsubst %,$(OUTPUT)/%,$(BINARIES_64))37 38CFLAGS := -O2 -g -std=gnu99 -pthread -Wall $(KHDR_INCLUDES)39 40# call32_from_64 in thunks.S uses absolute addresses.41ifeq ($(CAN_BUILD_WITH_NOPIE),1)42CFLAGS += -no-pie43 44ifneq ($(LLVM),)45# clang only wants to see -no-pie during linking. Here, we don't have a separate46# linking stage, so a compiler warning is unavoidable without (wastefully)47# restructuring the Makefile. Avoid this by simply disabling that warning.48CFLAGS += -Wno-unused-command-line-argument49endif50endif51 52define gen-target-rule-3253$(1) $(1)_32: $(OUTPUT)/$(1)_3254.PHONY: $(1) $(1)_3255endef56 57define gen-target-rule-6458$(1) $(1)_64: $(OUTPUT)/$(1)_6459.PHONY: $(1) $(1)_6460endef61 62ifeq ($(CAN_BUILD_I386),1)63all: all_3264TEST_PROGS += $(BINARIES_32)65EXTRA_CFLAGS += -DCAN_BUILD_3266$(foreach t,$(TARGETS_C_32BIT_ALL),$(eval $(call gen-target-rule-32,$(t))))67endif68 69ifeq ($(CAN_BUILD_X86_64),1)70all: all_6471TEST_PROGS += $(BINARIES_64)72EXTRA_CFLAGS += -DCAN_BUILD_6473$(foreach t,$(TARGETS_C_64BIT_ALL),$(eval $(call gen-target-rule-64,$(t))))74endif75 76all_32: $(BINARIES_32)77 78all_64: $(BINARIES_64)79 80EXTRA_CLEAN := $(BINARIES_32) $(BINARIES_64) srso81 82$(BINARIES_32): $(OUTPUT)/%_32: %.c helpers.h83 $(CC) -m32 -o $@ $(CFLAGS) $(EXTRA_CFLAGS) $< $(EXTRA_FILES) -lrt -ldl -lm84 85$(BINARIES_64): $(OUTPUT)/%_64: %.c helpers.h86 $(CC) -m64 -o $@ $(CFLAGS) $(EXTRA_CFLAGS) $< $(EXTRA_FILES) -lrt -ldl87 88# x86_64 users should be encouraged to install 32-bit libraries89ifeq ($(CAN_BUILD_I386)$(CAN_BUILD_X86_64),01)90all: warn_32bit_failure91 92warn_32bit_failure:93 @echo "Warning: you seem to have a broken 32-bit build" 2>&1; \94 echo "environment. This will reduce test coverage of 64-bit" 2>&1; \95 echo "kernels. If you are using a Debian-like distribution," 2>&1; \96 echo "try:"; 2>&1; \97 echo ""; \98 echo " apt-get install gcc-multilib libc6-i386 libc6-dev-i386"; \99 echo ""; \100 echo "If you are using a Fedora-like distribution, try:"; \101 echo ""; \102 echo " yum install glibc-devel.*i686"; \103 echo ""; \104 echo "If you are using a SUSE-like distribution, try:"; \105 echo ""; \106 echo " zypper install gcc-32bit glibc-devel-static-32bit"; \107 exit 0;108endif109 110# Add an additional file to the source file list for a given target, and also111# add a Makefile dependency on that same file. However, do these separately, so112# that the compiler invocation ("$(CC) file1.c file2.S") is not combined with113# the dependencies ("header3.h"), because clang, unlike gcc, will not accept114# header files as an input to the compiler invocation.115define extra-files116$(OUTPUT)/$(1): EXTRA_FILES := $(2)117$(OUTPUT)/$(1): $(2)118endef119 120$(eval $(call extra-files,sysret_ss_attrs_64,thunks.S))121$(eval $(call extra-files,ptrace_syscall_32,raw_syscall_helper_32.S))122$(eval $(call extra-files,test_syscall_vdso_32,thunks_32.S))123$(eval $(call extra-files,fsgsbase_restore_64,clang_helpers_64.S))124$(eval $(call extra-files,fsgsbase_restore_32,clang_helpers_32.S))125$(eval $(call extra-files,sysret_rip_64,clang_helpers_64.S))126 127# check_initial_reg_state is special: it needs a custom entry, and it128# needs to be static so that its interpreter doesn't destroy its initial129# state.130$(OUTPUT)/check_initial_reg_state_32: CFLAGS += -Wl,-ereal_start -static131$(OUTPUT)/check_initial_reg_state_64: CFLAGS += -Wl,-ereal_start -static132 133$(OUTPUT)/nx_stack_32: CFLAGS += -Wl,-z,noexecstack134$(OUTPUT)/nx_stack_64: CFLAGS += -Wl,-z,noexecstack135