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| author |   Vasily Gorbik <gor@linux.ibm.com> | 2018-06-15 12:28:05 +0200 |
|---|---|---|
| committer |   Martin Schwidefsky <schwidefsky@de.ibm.com> | 2018-06-25 10:14:37 +0200 |
| commit | 76bf9d6cef5788c769af987ff6f8ece40c6ab152 (patch) | |
| tree | 51c0983ae98cf57dd6516b7079ae473bb49816a9 /arch/s390/Makefile | |
| parent | s390/build: remove obsolete -mkernel-backchain flag (diff) | |
| download | linux-dev-76bf9d6cef5788c769af987ff6f8ece40c6ab152.tar.xz linux-dev-76bf9d6cef5788c769af987ff6f8ece40c6ab152.zip | |
s390/decompressor: correct build flags
The decompressor requires its own set of cc and asm flags, to avoid
building with features which do not make sense at such an early boot stage
(e.g. expoline, ftrace).
Currently cc flags are already set for the decompressor, but "cflags-y"
is not exported and hence empty. To fix that and to add asm flags, define
and export KBUILD_AFLAGS_DECOMPRESSOR and KBUILD_CFLAGS_DECOMPRESSOR
and rely on them in the decompressor's Makefile.
Reviewed-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/Makefile')
| -rw-r--r-- | arch/s390/Makefile | 20 |
1 files changed, 17 insertions, 3 deletions
diff --git a/arch/s390/Makefile b/arch/s390/Makefile index cdf3557864e1..d7ec2baa2f75 100644 --- a/arch/s390/Makefile +++ b/arch/s390/Makefile @@ -14,8 +14,14 @@ LD_BFD := elf64-s390 LDFLAGS := -m elf64_s390 KBUILD_AFLAGS_MODULE += -fPIC KBUILD_CFLAGS_MODULE += -fPIC -KBUILD_CFLAGS += -m64 KBUILD_AFLAGS += -m64 +KBUILD_CFLAGS += -m64 +KBUILD_AFLAGS_DECOMPRESSOR := -m64 -D__ASSEMBLY__ +KBUILD_CFLAGS_DECOMPRESSOR := -m64 -O2 +KBUILD_CFLAGS_DECOMPRESSOR += -DDISABLE_BRANCH_PROFILING -D__NO_FORTIFY +KBUILD_CFLAGS_DECOMPRESSOR += -fno-delete-null-pointer-checks -msoft-float +KBUILD_CFLAGS_DECOMPRESSOR += -fno-asynchronous-unwind-tables +KBUILD_CFLAGS_DECOMPRESSOR += $(call cc-option,-ffreestanding) UTS_MACHINE := s390x STACK_SIZE := 16384 CHECKFLAGS += -D__s390__ -D__s390x__ @@ -57,6 +63,9 @@ cflags-$(CONFIG_PACK_STACK) += -mpacked-stack -D__PACK_STACK aflags-$(CONFIG_PACK_STACK) += -D__PACK_STACK endif +KBUILD_AFLAGS_DECOMPRESSOR += $(aflags-y) +KBUILD_CFLAGS_DECOMPRESSOR += $(cflags-y) + ifeq ($(call cc-option-yn,-mstack-size=8192 -mstack-guard=128),y) cflags-$(CONFIG_CHECK_STACK) += -mstack-size=$(STACK_SIZE) ifneq ($(call cc-option-yn,-mstack-size=8192),y) @@ -64,8 +73,11 @@ cflags-$(CONFIG_CHECK_STACK) += -mstack-guard=$(CONFIG_STACK_GUARD) endif endif -ifeq ($(call cc-option-yn,-mwarn-dynamicstack),y) -cflags-$(CONFIG_WARN_DYNAMIC_STACK) += -mwarn-dynamicstack +ifdef CONFIG_WARN_DYNAMIC_STACK + ifeq ($(call cc-option-yn,-mwarn-dynamicstack),y) + KBUILD_CFLAGS += -mwarn-dynamicstack + KBUILD_CFLAGS_DECOMPRESSOR += -mwarn-dynamicstack + endif endif ifdef CONFIG_EXPOLINE @@ -96,6 +108,8 @@ KBUILD_CFLAGS += -mbackchain -msoft-float $(cflags-y) KBUILD_CFLAGS += -pipe -fno-strength-reduce -Wno-sign-compare KBUILD_CFLAGS += -fno-asynchronous-unwind-tables $(cfi) KBUILD_AFLAGS += $(aflags-y) $(cfi) +export KBUILD_AFLAGS_DECOMPRESSOR +export KBUILD_CFLAGS_DECOMPRESSOR OBJCOPYFLAGS := -O binary |