Makefile (e74e1d55728509b352e4eec4283dd5b2781b2070) Makefile (766d95b1ed93ebdd07ac87490e60e442342f5dc4)
1# SPDX-License-Identifier: GPL-2.0
2# Copyright (C) 2020 ARM Limited
3
4# preserve CC value from top level Makefile
5ifeq ($(CC),cc)
6CC := $(CROSS_COMPILE)gcc
7endif
8
9CFLAGS += -mbranch-protection=pac-ret
10# check if the compiler supports ARMv8.3 and branch protection with PAuth
11pauth_cc_support := $(shell if ($(CC) $(CFLAGS) -march=armv8.3-a -E -x c /dev/null -o /dev/null 2>&1) then echo "1"; fi)
12
13ifeq ($(pauth_cc_support),1)
14TEST_GEN_PROGS := pac
1# SPDX-License-Identifier: GPL-2.0
2# Copyright (C) 2020 ARM Limited
3
4# preserve CC value from top level Makefile
5ifeq ($(CC),cc)
6CC := $(CROSS_COMPILE)gcc
7endif
8
9CFLAGS += -mbranch-protection=pac-ret
10# check if the compiler supports ARMv8.3 and branch protection with PAuth
11pauth_cc_support := $(shell if ($(CC) $(CFLAGS) -march=armv8.3-a -E -x c /dev/null -o /dev/null 2>&1) then echo "1"; fi)
12
13ifeq ($(pauth_cc_support),1)
14TEST_GEN_PROGS := pac
15TEST_GEN_FILES := pac_corruptor.o
15TEST_GEN_FILES := pac_corruptor.o helper.o
16endif
17
18include ../../lib.mk
19
20ifeq ($(pauth_cc_support),1)
21# pac* and aut* instructions are not available on architectures berfore
22# ARMv8.3. Therefore target ARMv8.3 wherever they are used directly
23$(OUTPUT)/pac_corruptor.o: pac_corruptor.S
24 $(CC) -c $^ -o $@ $(CFLAGS) -march=armv8.3-a
25
16endif
17
18include ../../lib.mk
19
20ifeq ($(pauth_cc_support),1)
21# pac* and aut* instructions are not available on architectures berfore
22# ARMv8.3. Therefore target ARMv8.3 wherever they are used directly
23$(OUTPUT)/pac_corruptor.o: pac_corruptor.S
24 $(CC) -c $^ -o $@ $(CFLAGS) -march=armv8.3-a
25
26$(OUTPUT)/helper.o: helper.c
27 $(CC) -c $^ -o $@ $(CFLAGS) -march=armv8.3-a
28
26# when -mbranch-protection is enabled and the target architecture is ARMv8.3 or
27# greater, gcc emits pac* instructions which are not in HINT NOP space,
28# preventing the tests from occurring at all. Compile for ARMv8.2 so tests can
29# run on earlier targets and print a meaningful error messages
29# when -mbranch-protection is enabled and the target architecture is ARMv8.3 or
30# greater, gcc emits pac* instructions which are not in HINT NOP space,
31# preventing the tests from occurring at all. Compile for ARMv8.2 so tests can
32# run on earlier targets and print a meaningful error messages
30$(OUTPUT)/pac: pac.c $(OUTPUT)/pac_corruptor.o
33$(OUTPUT)/pac: pac.c $(OUTPUT)/pac_corruptor.o $(OUTPUT)/helper.o
31 $(CC) $^ -o $@ $(CFLAGS) -march=armv8.2-a
32endif
34 $(CC) $^ -o $@ $(CFLAGS) -march=armv8.2-a
35endif