projects / thirdparty / kernel / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| b2441318 | 1 | # SPDX-License-Identifier: GPL-2.0 |
| 36be5cba ME |
2 | |
| 3 | ifdef CONFIG_CC_HAS_KASAN_MEMINTRINSIC_PREFIX | |
| 4 | # Safe for compiler to generate meminstrinsic calls in uninstrumented files. | |
| 5 | CFLAGS_KASAN_NOSANITIZE := | |
| 6 | else | |
| 7 | # Don't let compiler generate memintrinsic calls in uninstrumented files | |
| 8 | # because they are instrumented. | |
| 34b5560d | 9 | CFLAGS_KASAN_NOSANITIZE := -fno-builtin |
| 36be5cba ME |
10 | endif |
| 11 | ||
| 34b5560d | 12 | KASAN_SHADOW_OFFSET ?= $(CONFIG_KASAN_SHADOW_OFFSET) |
| 34b5560d | 13 | |
| 5c595ac4 AB |
14 | cc-param = $(call cc-option, -mllvm -$(1), $(call cc-option, --param $(1))) |
| 15 | ||
| 02c58773 WW |
16 | ifdef CONFIG_KASAN_STACK |
| 17 | stack_enable := 1 | |
| 18 | else | |
| 19 | stack_enable := 0 | |
| 20 | endif | |
| 21 | ||
| 2bd926b4 AK |
22 | ifdef CONFIG_KASAN_GENERIC |
| 23 | ||
| 0b24becc AR |
24 | ifdef CONFIG_KASAN_INLINE |
| 25 | call_threshold := 10000 | |
| 26 | else | |
| 27 | call_threshold := 0 | |
| 28 | endif | |
| 29 | ||
| 30 | CFLAGS_KASAN_MINIMAL := -fsanitize=kernel-address | |
| 31 | ||
| 2bd926b4 AK |
32 | # -fasan-shadow-offset fails without -fsanitize |
| 33 | CFLAGS_KASAN_SHADOW := $(call cc-option, -fsanitize=kernel-address \ | |
| 1a69e7ce AR |
34 | -fasan-shadow-offset=$(KASAN_SHADOW_OFFSET), \ |
| 35 | $(call cc-option, -fsanitize=kernel-address \ | |
| 36 | -mllvm -asan-mapping-offset=$(KASAN_SHADOW_OFFSET))) | |
| 37 | ||
| 2bd926b4 AK |
38 | ifeq ($(strip $(CFLAGS_KASAN_SHADOW)),) |
| 39 | CFLAGS_KASAN := $(CFLAGS_KASAN_MINIMAL) | |
| 40 | else | |
| 41 | # Now add all the compiler specific options that are valid standalone | |
| 42 | CFLAGS_KASAN := $(CFLAGS_KASAN_SHADOW) \ | |
| 43 | $(call cc-param,asan-globals=1) \ | |
| 44 | $(call cc-param,asan-instrumentation-with-call-threshold=$(call_threshold)) \ | |
| 2bd926b4 | 45 | $(call cc-param,asan-instrument-allocas=1) |
| 0b24becc | 46 | endif |
| c5caf21a | 47 | |
| 19532869 NC |
48 | CFLAGS_KASAN += $(call cc-param,asan-stack=$(stack_enable)) |
| 49 | ||
| 51287dcb ME |
50 | # Instrument memcpy/memset/memmove calls by using instrumented __asan_mem*() |
| 51 | # instead. With compilers that don't support this option, compiler-inserted | |
| 52 | # memintrinsics won't be checked by KASAN on GENERIC_ENTRY architectures. | |
| 53 | CFLAGS_KASAN += $(call cc-param,asan-kernel-mem-intrinsic-prefix=1) | |
| 54 | ||
| 2bd926b4 | 55 | endif # CONFIG_KASAN_GENERIC |
| 0e410e15 | 56 | |
| 2bd926b4 AK |
57 | ifdef CONFIG_KASAN_SW_TAGS |
| 58 | ||
| 59 | ifdef CONFIG_KASAN_INLINE | |
| 5c595ac4 | 60 | instrumentation_flags := $(call cc-param,hwasan-mapping-offset=$(KASAN_SHADOW_OFFSET)) |
| 2bd926b4 | 61 | else |
| 5c595ac4 | 62 | instrumentation_flags := $(call cc-param,hwasan-instrument-with-calls=1) |
| 2bd926b4 AK |
63 | endif |
| 64 | ||
| 65 | CFLAGS_KASAN := -fsanitize=kernel-hwaddress \ | |
| 02c58773 | 66 | $(call cc-param,hwasan-instrument-stack=$(stack_enable)) \ |
| 5c595ac4 | 67 | $(call cc-param,hwasan-use-short-granules=0) \ |
| 1cbdf60b | 68 | $(call cc-param,hwasan-inline-all-checks=0) \ |
| 2bd926b4 AK |
69 | $(instrumentation_flags) |
| 70 | ||
| 51287dcb | 71 | # Instrument memcpy/memset/memmove calls by using instrumented __hwasan_mem*(). |
| 90fd8336 | 72 | ifeq ($(call clang-min-version, 150000)$(call gcc-min-version, 130000),y) |
| 51287dcb | 73 | CFLAGS_KASAN += $(call cc-param,hwasan-kernel-mem-intrinsic-prefix=1) |
| 90fd8336 | 74 | endif |
| 51287dcb | 75 | |
| 2bd926b4 | 76 | endif # CONFIG_KASAN_SW_TAGS |
| bb273211 MY |
77 | |
| 78 | export CFLAGS_KASAN CFLAGS_KASAN_NOSANITIZE |