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