| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 1 | # SPDX-License-Identifier: GPL-2.0 |
| 2 | ifdef CONFIG_KASAN |
| David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame^] | 3 | CFLAGS_KASAN_NOSANITIZE := -fno-builtin |
| 4 | KASAN_SHADOW_OFFSET ?= $(CONFIG_KASAN_SHADOW_OFFSET) |
| 5 | endif |
| 6 | |
| 7 | ifdef CONFIG_KASAN_GENERIC |
| 8 | |
| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 9 | ifdef CONFIG_KASAN_INLINE |
| 10 | call_threshold := 10000 |
| 11 | else |
| 12 | call_threshold := 0 |
| 13 | endif |
| 14 | |
| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 15 | CFLAGS_KASAN_MINIMAL := -fsanitize=kernel-address |
| 16 | |
| 17 | cc-param = $(call cc-option, -mllvm -$(1), $(call cc-option, --param $(1))) |
| 18 | |
| David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame^] | 19 | # -fasan-shadow-offset fails without -fsanitize |
| 20 | CFLAGS_KASAN_SHADOW := $(call cc-option, -fsanitize=kernel-address \ |
| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 21 | -fasan-shadow-offset=$(KASAN_SHADOW_OFFSET), \ |
| 22 | $(call cc-option, -fsanitize=kernel-address \ |
| 23 | -mllvm -asan-mapping-offset=$(KASAN_SHADOW_OFFSET))) |
| 24 | |
| David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame^] | 25 | ifeq ($(strip $(CFLAGS_KASAN_SHADOW)),) |
| 26 | CFLAGS_KASAN := $(CFLAGS_KASAN_MINIMAL) |
| 27 | else |
| 28 | # Now add all the compiler specific options that are valid standalone |
| 29 | CFLAGS_KASAN := $(CFLAGS_KASAN_SHADOW) \ |
| 30 | $(call cc-param,asan-globals=1) \ |
| 31 | $(call cc-param,asan-instrumentation-with-call-threshold=$(call_threshold)) \ |
| 32 | $(call cc-param,asan-stack=$(CONFIG_KASAN_STACK)) \ |
| 33 | $(call cc-param,asan-instrument-allocas=1) |
| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 34 | endif |
| 35 | |
| David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame^] | 36 | endif # CONFIG_KASAN_GENERIC |
| 37 | |
| 38 | ifdef CONFIG_KASAN_SW_TAGS |
| 39 | |
| 40 | ifdef CONFIG_KASAN_INLINE |
| 41 | instrumentation_flags := -mllvm -hwasan-mapping-offset=$(KASAN_SHADOW_OFFSET) |
| 42 | else |
| 43 | instrumentation_flags := -mllvm -hwasan-instrument-with-calls=1 |
| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 44 | endif |
| 45 | |
| David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame^] | 46 | CFLAGS_KASAN := -fsanitize=kernel-hwaddress \ |
| 47 | -mllvm -hwasan-instrument-stack=0 \ |
| 48 | $(instrumentation_flags) |
| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 49 | |
| David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame^] | 50 | endif # CONFIG_KASAN_SW_TAGS |