diff options
| author | Xingxing Su | 2020-12-03 15:22:51 +0800 |
|---|---|---|
| committer | Thomas Bogendoerfer | 2020-12-04 13:00:53 +0100 |
| commit | 8b3165e54566e8bb8f4b7d4e5f12ced78ce462bb (patch) | |
| tree | d7f2c9af831258975d050bb6c3f8ddc3f3bbccbe /arch | |
| parent | 79109a515ac3f1009632f4a4c81597e9438a2d65 (diff) | |
MIPS: Enable GCOV
Enable gcov profiling of the entire kernel on mips. Required changes
include disabling profiling for:
* arch/kernel/boot/compressed: not linked to main kernel.
Lightly tested on Loongson 3A3000 an 3A4000, seems to work as expected.
without "GCOV_PROFILE := n" in compressed Makefile,
build errors as follows:
...
ld: arch/mips/boot/compressed/string.o:(.data+0x88):
undefined reference to `__gcov_merge_add'
ld: arch/mips/boot/compressed/string.o:
in function `_GLOBAL__sub_I_00100_0_memcpy':
string.c:(.text.startup+0x4): undefined reference to `__gcov_init'
ld: arch/mips/boot/compressed/string.o:
in function `_GLOBAL__sub_D_00100_1_memcpy':
string.c:(.text.exit+0x0): undefined reference to `__gcov_exit'
...
Signed-off-by: Youling Tang <tangyouling@loongson.cn>
Signed-off-by: Xingxing Su <suxingxing@loongson.cn>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/mips/Kconfig | 1 | ||||
| -rw-r--r-- | arch/mips/boot/compressed/Makefile | 1 |
2 files changed, 2 insertions, 0 deletions
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig index 44a47adb1275..b99498958b5c 100644 --- a/arch/mips/Kconfig +++ b/arch/mips/Kconfig @@ -9,6 +9,7 @@ config MIPS select ARCH_HAS_PTE_SPECIAL if !(32BIT && CPU_HAS_RIXI) select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST select ARCH_HAS_UBSAN_SANITIZE_ALL + select ARCH_HAS_GCOV_PROFILE_ALL select ARCH_SUPPORTS_UPROBES select ARCH_USE_BUILTIN_BSWAP select ARCH_USE_CMPXCHG_LOCKREF if 64BIT diff --git a/arch/mips/boot/compressed/Makefile b/arch/mips/boot/compressed/Makefile index 4c3bc7e3d56d..47cd9dc7454a 100644 --- a/arch/mips/boot/compressed/Makefile +++ b/arch/mips/boot/compressed/Makefile @@ -36,6 +36,7 @@ KBUILD_AFLAGS := $(KBUILD_AFLAGS) -D__ASSEMBLY__ \ # Prevents link failures: __sanitizer_cov_trace_pc() is not linked in. KCOV_INSTRUMENT := n +GCOV_PROFILE := n # decompressor objects (linked with vmlinuz) vmlinuzobjs-y := $(obj)/head.o $(obj)/decompress.o $(obj)/string.o |