Makefile

  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 sigtrap_loop \
 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 avx apx
 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)
 39CFLAGS += -I $(top_srcdir)/tools/testing/selftests/
 40
 41# call32_from_64 in thunks.S uses absolute addresses.
 42ifeq ($(CAN_BUILD_WITH_NOPIE),1)
 43CFLAGS += -no-pie
 44
 45ifneq ($(LLVM),)
 46# clang only wants to see -no-pie during linking. Here, we don't have a separate
 47# linking stage, so a compiler warning is unavoidable without (wastefully)
 48# restructuring the Makefile. Avoid this by simply disabling that warning.
 49CFLAGS += -Wno-unused-command-line-argument
 50endif
 51endif
 52
 53define gen-target-rule-32
 54$(1) $(1)_32: $(OUTPUT)/$(1)_32
 55.PHONY: $(1) $(1)_32
 56endef
 57
 58define gen-target-rule-64
 59$(1) $(1)_64: $(OUTPUT)/$(1)_64
 60.PHONY: $(1) $(1)_64
 61endef
 62
 63ifeq ($(CAN_BUILD_I386),1)
 64all: all_32
 65TEST_PROGS += $(BINARIES_32)
 66EXTRA_CFLAGS += -DCAN_BUILD_32
 67$(foreach t,$(TARGETS_C_32BIT_ALL),$(eval $(call gen-target-rule-32,$(t))))
 68endif
 69
 70ifeq ($(CAN_BUILD_X86_64),1)
 71all: all_64
 72TEST_PROGS += $(BINARIES_64)
 73EXTRA_CFLAGS += -DCAN_BUILD_64
 74$(foreach t,$(TARGETS_C_64BIT_ALL),$(eval $(call gen-target-rule-64,$(t))))
 75endif
 76
 77all_32: $(BINARIES_32)
 78
 79all_64: $(BINARIES_64)
 80
 81EXTRA_CLEAN := $(BINARIES_32) $(BINARIES_64) srso
 82
 83$(BINARIES_32): $(OUTPUT)/%_32: %.c helpers.h
 84	$(CC) -m32 -o $@ $(CFLAGS) $(EXTRA_CFLAGS) $< $(EXTRA_FILES) -lrt -ldl -lm
 85
 86$(BINARIES_64): $(OUTPUT)/%_64: %.c helpers.h
 87	$(CC) -m64 -o $@ $(CFLAGS) $(EXTRA_CFLAGS) $< $(EXTRA_FILES) -lrt -ldl
 88
 89# x86_64 users should be encouraged to install 32-bit libraries
 90ifeq ($(CAN_BUILD_I386)$(CAN_BUILD_X86_64),01)
 91all: warn_32bit_failure
 92
 93warn_32bit_failure:
 94	@echo "Warning: you seem to have a broken 32-bit build" 2>&1; 	\
 95	echo "environment.  This will reduce test coverage of 64-bit" 2>&1; \
 96	echo "kernels.  If you are using a Debian-like distribution," 2>&1; \
 97	echo "try:"; 2>&1; \
 98	echo "";							\
 99	echo "  apt-get install gcc-multilib libc6-i386 libc6-dev-i386"; \
100	echo "";							\
101	echo "If you are using a Fedora-like distribution, try:";	\
102	echo "";							\
103	echo "  yum install glibc-devel.*i686";				\
104	echo "";							\
105	echo "If you are using a SUSE-like distribution, try:";		\
106	echo "";							\
107	echo "  zypper install gcc-32bit glibc-devel-static-32bit";	\
108	exit 0;
109endif
110
111# Add an additional file to the source file list for a given target, and also
112# add a Makefile dependency on that same file. However, do these separately, so
113# that the compiler invocation ("$(CC) file1.c file2.S") is not combined with
114# the dependencies ("header3.h"), because clang, unlike gcc, will not accept
115# header files as an input to the compiler invocation.
116define extra-files
117$(OUTPUT)/$(1): EXTRA_FILES := $(2)
118$(OUTPUT)/$(1): $(2)
119endef
120
121$(eval $(call extra-files,sysret_ss_attrs_64,thunks.S))
122$(eval $(call extra-files,ptrace_syscall_32,raw_syscall_helper_32.S))
123$(eval $(call extra-files,test_syscall_vdso_32,thunks_32.S))
124$(eval $(call extra-files,fsgsbase_restore_64,clang_helpers_64.S))
125$(eval $(call extra-files,fsgsbase_restore_32,clang_helpers_32.S))
126$(eval $(call extra-files,sysret_rip_64,clang_helpers_64.S))
127
128# check_initial_reg_state is special: it needs a custom entry, and it
129# needs to be static so that its interpreter doesn't destroy its initial
130# state.
131$(OUTPUT)/check_initial_reg_state_32: CFLAGS += -Wl,-ereal_start -static
132$(OUTPUT)/check_initial_reg_state_64: CFLAGS += -Wl,-ereal_start -static
133
134$(OUTPUT)/nx_stack_32: CFLAGS += -Wl,-z,noexecstack
135$(OUTPUT)/nx_stack_64: CFLAGS += -Wl,-z,noexecstack
136
137$(OUTPUT)/avx_64: CFLAGS += -mno-avx -mno-avx512f
138$(OUTPUT)/amx_64: EXTRA_FILES += xstate.c
139$(OUTPUT)/avx_64: EXTRA_FILES += xstate.c
140$(OUTPUT)/apx_64: EXTRA_FILES += xstate.c