1# SPDX-License-Identifier: GPL-2.0 2all: 3 4include ../lib.mk 5 6.PHONY: all all_32 all_64 warn_32bit_failure clean 7 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 sigaltstack 17TARGETS_C_BOTHBITS += nx_stack 18TARGETS_C_32BIT_ONLY := entry_from_vm86 test_syscall_vdso unwind_vdso \ 19 test_FCMOV test_FCOMI test_FISTTP \ 20 vdso_restorer 21TARGETS_C_64BIT_ONLY := fsgsbase sysret_rip syscall_numbering \ 22 corrupt_xstate_header amx lam test_shadow_stack 23# Some selftests require 32bit support enabled also on 64bit systems 24TARGETS_C_32BIT_NEEDED := ldt_gdt ptrace_syscall 25 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) 30endif 31 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-pie 43 44ifneq ($(LLVM),) 45# clang only wants to see -no-pie during linking. Here, we don't have a separate 46# linking stage, so a compiler warning is unavoidable without (wastefully) 47# restructuring the Makefile. Avoid this by simply disabling that warning. 48CFLAGS += -Wno-unused-command-line-argument 49endif 50endif 51 52define gen-target-rule-32 53$(1) $(1)_32: $(OUTPUT)/$(1)_32 54.PHONY: $(1) $(1)_32 55endef 56 57define gen-target-rule-64 58$(1) $(1)_64: $(OUTPUT)/$(1)_64 59.PHONY: $(1) $(1)_64 60endef 61 62ifeq ($(CAN_BUILD_I386),1) 63all: all_32 64TEST_PROGS += $(BINARIES_32) 65EXTRA_CFLAGS += -DCAN_BUILD_32 66$(foreach t,$(TARGETS_C_32BIT_ALL),$(eval $(call gen-target-rule-32,$(t)))) 67endif 68 69ifeq ($(CAN_BUILD_X86_64),1) 70all: all_64 71TEST_PROGS += $(BINARIES_64) 72EXTRA_CFLAGS += -DCAN_BUILD_64 73$(foreach t,$(TARGETS_C_64BIT_ALL),$(eval $(call gen-target-rule-64,$(t)))) 74endif 75 76all_32: $(BINARIES_32) 77 78all_64: $(BINARIES_64) 79 80EXTRA_CLEAN := $(BINARIES_32) $(BINARIES_64) srso 81 82$(BINARIES_32): $(OUTPUT)/%_32: %.c helpers.h 83 $(CC) -m32 -o $@ $(CFLAGS) $(EXTRA_CFLAGS) $< $(EXTRA_FILES) -lrt -ldl -lm 84 85$(BINARIES_64): $(OUTPUT)/%_64: %.c helpers.h 86 $(CC) -m64 -o $@ $(CFLAGS) $(EXTRA_CFLAGS) $< $(EXTRA_FILES) -lrt -ldl 87 88# x86_64 users should be encouraged to install 32-bit libraries 89ifeq ($(CAN_BUILD_I386)$(CAN_BUILD_X86_64),01) 90all: warn_32bit_failure 91 92warn_32bit_failure: 93 @echo "Warning: you seem to have a broken 32-bit build" 2>&1; \ 94 echo "environment. This will reduce test coverage of 64-bit" 2>&1; \ 95 echo "kernels. If you are using a Debian-like distribution," 2>&1; \ 96 echo "try:"; 2>&1; \ 97 echo ""; \ 98 echo " apt-get install gcc-multilib libc6-i386 libc6-dev-i386"; \ 99 echo ""; \ 100 echo "If you are using a Fedora-like distribution, try:"; \ 101 echo ""; \ 102 echo " yum install glibc-devel.*i686"; \ 103 echo ""; \ 104 echo "If you are using a SUSE-like distribution, try:"; \ 105 echo ""; \ 106 echo " zypper install gcc-32bit glibc-devel-static-32bit"; \ 107 exit 0; 108endif 109 110# Add an additional file to the source file list for a given target, and also 111# add a Makefile dependency on that same file. However, do these separately, so 112# that the compiler invocation ("$(CC) file1.c file2.S") is not combined with 113# the dependencies ("header3.h"), because clang, unlike gcc, will not accept 114# header files as an input to the compiler invocation. 115define extra-files 116$(OUTPUT)/$(1): EXTRA_FILES := $(2) 117$(OUTPUT)/$(1): $(2) 118endef 119 120$(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 $(call extra-files,sysret_rip_64,clang_helpers_64.S)) 126 127# check_initial_reg_state is special: it needs a custom entry, and it 128# needs to be static so that its interpreter doesn't destroy its initial 129# state. 130$(OUTPUT)/check_initial_reg_state_32: CFLAGS += -Wl,-ereal_start -static 131$(OUTPUT)/check_initial_reg_state_64: CFLAGS += -Wl,-ereal_start -static 132 133$(OUTPUT)/nx_stack_32: CFLAGS += -Wl,-z,noexecstack 134$(OUTPUT)/nx_stack_64: CFLAGS += -Wl,-z,noexecstack 135