| | 1 | # SPDX-License-Identifier: GPL-2.0 |
| | 2 | CFLAGS_KASAN_NOSANITIZE := -fno-builtin |
| | 3 | KASAN_SHADOW_OFFSET ?= $(CONFIG_KASAN_SHADOW_OFFSET) |
| | 4 | |
| | 5 | cc-param = $(call cc-option, -mllvm -$(1), $(call cc-option, --param $(1))) |
| | 6 | |
| | 7 | ifdef CONFIG_KASAN_STACK |
| | 8 | stack_enable := 1 |
| | 9 | else |
| | 10 | stack_enable := 0 |
| | 11 | endif |
| | 12 | |
| | 13 | ifdef CONFIG_KASAN_GENERIC |
| | 14 | |
| | 15 | ifdef CONFIG_KASAN_INLINE |
| | 16 | call_threshold := 10000 |
| | 17 | else |
| | 18 | call_threshold := 0 |
| | 19 | endif |
| | 20 | |
| | 21 | CFLAGS_KASAN_MINIMAL := -fsanitize=kernel-address |
| | 22 | |
| | 23 | # -fasan-shadow-offset fails without -fsanitize |
| | 24 | CFLAGS_KASAN_SHADOW := $(call cc-option, -fsanitize=kernel-address \ |
| | 25 | -fasan-shadow-offset=$(KASAN_SHADOW_OFFSET), \ |
| | 26 | $(call cc-option, -fsanitize=kernel-address \ |
| | 27 | -mllvm -asan-mapping-offset=$(KASAN_SHADOW_OFFSET))) |
| | 28 | |
| | 29 | ifeq ($(strip $(CFLAGS_KASAN_SHADOW)),) |
| | 30 | CFLAGS_KASAN := $(CFLAGS_KASAN_MINIMAL) |
| | 31 | else |
| | 32 | # Now add all the compiler specific options that are valid standalone |
| | 33 | CFLAGS_KASAN := $(CFLAGS_KASAN_SHADOW) \ |
| | 34 | $(call cc-param,asan-globals=1) \ |
| | 35 | $(call cc-param,asan-instrumentation-with-call-threshold=$(call_threshold)) \ |
| | 36 | $(call cc-param,asan-instrument-allocas=1) |
| | 37 | endif |
| | 38 | |
| | 39 | CFLAGS_KASAN += $(call cc-param,asan-stack=$(stack_enable)) |
| | 40 | |
| | 41 | endif # CONFIG_KASAN_GENERIC |
| | 42 | |
| | 43 | ifdef CONFIG_KASAN_SW_TAGS |
| | 44 | |
| | 45 | ifdef CONFIG_KASAN_INLINE |
| | 46 | instrumentation_flags := $(call cc-param,hwasan-mapping-offset=$(KASAN_SHADOW_OFFSET)) |
| | 47 | else |
| | 48 | instrumentation_flags := $(call cc-param,hwasan-instrument-with-calls=1) |
| | 49 | endif |
| | 50 | |
| | 51 | CFLAGS_KASAN := -fsanitize=kernel-hwaddress \ |
| | 52 | $(call cc-param,hwasan-instrument-stack=$(stack_enable)) \ |
| | 53 | $(call cc-param,hwasan-use-short-granules=0) \ |
| | 54 | $(call cc-param,hwasan-inline-all-checks=0) \ |
| | 55 | $(instrumentation_flags) |
| | 56 | |
| | 57 | endif # CONFIG_KASAN_SW_TAGS |
| | 58 | |
| | 59 | export CFLAGS_KASAN CFLAGS_KASAN_NOSANITIZE |
projects / mirror_ubuntu-jammy-kernel.git / blame_incremental