projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| b2441318 | 1 | # SPDX-License-Identifier: GPL-2.0 |
| 34b5560d MR |
2 | CFLAGS_KASAN_NOSANITIZE := -fno-builtin |
| 3 | KASAN_SHADOW_OFFSET ?= $(CONFIG_KASAN_SHADOW_OFFSET) | |
| 34b5560d | 4 | |
| 5c595ac4 AB |
5 | cc-param = $(call cc-option, -mllvm -$(1), $(call cc-option, --param $(1))) |
| 6 | ||
| 02c58773 WW |
7 | ifdef CONFIG_KASAN_STACK |
| 8 | stack_enable := 1 | |
| 9 | else | |
| 10 | stack_enable := 0 | |
| 11 | endif | |
| 12 | ||
| 2bd926b4 AK |
13 | ifdef CONFIG_KASAN_GENERIC |
| 14 | ||
| 0b24becc AR |
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 | ||
| 2bd926b4 AK |
23 | # -fasan-shadow-offset fails without -fsanitize |
| 24 | CFLAGS_KASAN_SHADOW := $(call cc-option, -fsanitize=kernel-address \ | |
| 1a69e7ce AR |
25 | -fasan-shadow-offset=$(KASAN_SHADOW_OFFSET), \ |
| 26 | $(call cc-option, -fsanitize=kernel-address \ | |
| 27 | -mllvm -asan-mapping-offset=$(KASAN_SHADOW_OFFSET))) | |
| 28 | ||
| 2bd926b4 AK |
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)) \ | |
| 2bd926b4 | 36 | $(call cc-param,asan-instrument-allocas=1) |
| 0b24becc | 37 | endif |
| c5caf21a | 38 | |
| 19532869 NC |
39 | CFLAGS_KASAN += $(call cc-param,asan-stack=$(stack_enable)) |
| 40 | ||
| 51287dcb ME |
41 | # Instrument memcpy/memset/memmove calls by using instrumented __asan_mem*() |
| 42 | # instead. With compilers that don't support this option, compiler-inserted | |
| 43 | # memintrinsics won't be checked by KASAN on GENERIC_ENTRY architectures. | |
| 44 | CFLAGS_KASAN += $(call cc-param,asan-kernel-mem-intrinsic-prefix=1) | |
| 45 | ||
| 2bd926b4 | 46 | endif # CONFIG_KASAN_GENERIC |
| 0e410e15 | 47 | |
| 2bd926b4 AK |
48 | ifdef CONFIG_KASAN_SW_TAGS |
| 49 | ||
| 50 | ifdef CONFIG_KASAN_INLINE | |
| 5c595ac4 | 51 | instrumentation_flags := $(call cc-param,hwasan-mapping-offset=$(KASAN_SHADOW_OFFSET)) |
| 2bd926b4 | 52 | else |
| 5c595ac4 | 53 | instrumentation_flags := $(call cc-param,hwasan-instrument-with-calls=1) |
| 2bd926b4 AK |
54 | endif |
| 55 | ||
| 56 | CFLAGS_KASAN := -fsanitize=kernel-hwaddress \ | |
| 02c58773 | 57 | $(call cc-param,hwasan-instrument-stack=$(stack_enable)) \ |
| 5c595ac4 | 58 | $(call cc-param,hwasan-use-short-granules=0) \ |
| 1cbdf60b | 59 | $(call cc-param,hwasan-inline-all-checks=0) \ |
| 2bd926b4 AK |
60 | $(instrumentation_flags) |
| 61 | ||
| 51287dcb ME |
62 | # Instrument memcpy/memset/memmove calls by using instrumented __hwasan_mem*(). |
| 63 | CFLAGS_KASAN += $(call cc-param,hwasan-kernel-mem-intrinsic-prefix=1) | |
| 64 | ||
| 2bd926b4 | 65 | endif # CONFIG_KASAN_SW_TAGS |
| bb273211 MY |
66 | |
| 67 | export CFLAGS_KASAN CFLAGS_KASAN_NOSANITIZE |