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| author | Ard Biesheuvel <ard.biesheuvel@linaro.org> | 2014-07-02 14:54:43 +0200 |
|---|---|---|
| committer | Matt Fleming <matt.fleming@intel.com> | 2014-07-18 21:22:19 +0100 |
| commit | f4f75ad5741fe0331bbe1f5c42b906cda299f26b (patch) | |
| tree | 0f06f0b7ecc94bc930a952dd79763adc94b34fda /drivers | |
| parent | bd669475d14e3279a7f96ed917a82df5da6ad52d (diff) | |
| download | linux-f4f75ad5741fe0331bbe1f5c42b906cda299f26b.tar.gz linux-f4f75ad5741fe0331bbe1f5c42b906cda299f26b.tar.bz2 linux-f4f75ad5741fe0331bbe1f5c42b906cda299f26b.zip | |
efi: efistub: Convert into static library
This patch changes both x86 and arm64 efistub implementations
from #including shared .c files under drivers/firmware/efi to
building shared code as a static library.
The x86 code uses a stub built into the boot executable which
uncompresses the kernel at boot time. In this case, the library is
linked into the decompressor.
In the arm64 case, the stub is part of the kernel proper so the library
is linked into the kernel proper as well.
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/firmware/efi/Kconfig | 3 | ||||
| -rw-r--r-- | drivers/firmware/efi/Makefile | 1 | ||||
| -rw-r--r-- | drivers/firmware/efi/libstub/Makefile | 26 | ||||
| -rw-r--r-- | drivers/firmware/efi/libstub/arm-stub.c (renamed from drivers/firmware/efi/arm-stub.c) | 0 | ||||
| -rw-r--r-- | drivers/firmware/efi/libstub/efi-stub-helper.c (renamed from drivers/firmware/efi/efi-stub-helper.c) | 0 | ||||
| -rw-r--r-- | drivers/firmware/efi/libstub/efistub.h (renamed from drivers/firmware/efi/efistub.h) | 0 | ||||
| -rw-r--r-- | drivers/firmware/efi/libstub/fdt.c (renamed from drivers/firmware/efi/fdt.c) | 0 |
7 files changed, 30 insertions, 0 deletions
diff --git a/drivers/firmware/efi/Kconfig b/drivers/firmware/efi/Kconfig index 588dc47e7075..f712d47f30d8 100644 --- a/drivers/firmware/efi/Kconfig +++ b/drivers/firmware/efi/Kconfig @@ -57,6 +57,9 @@ config EFI_PARAMS_FROM_FDT config EFI_RUNTIME_WRAPPERS bool +config EFI_ARMSTUB + bool + endmenu config UEFI_CPER diff --git a/drivers/firmware/efi/Makefile b/drivers/firmware/efi/Makefile index e1096539eedb..a204d1474cec 100644 --- a/drivers/firmware/efi/Makefile +++ b/drivers/firmware/efi/Makefile @@ -7,3 +7,4 @@ obj-$(CONFIG_EFI_VARS_PSTORE) += efi-pstore.o obj-$(CONFIG_UEFI_CPER) += cper.o obj-$(CONFIG_EFI_RUNTIME_MAP) += runtime-map.o obj-$(CONFIG_EFI_RUNTIME_WRAPPERS) += runtime-wrappers.o +obj-$(CONFIG_EFI_STUB) += libstub/ diff --git a/drivers/firmware/efi/libstub/Makefile b/drivers/firmware/efi/libstub/Makefile new file mode 100644 index 000000000000..b14bc2b9fb4d --- /dev/null +++ b/drivers/firmware/efi/libstub/Makefile @@ -0,0 +1,26 @@ +# +# The stub may be linked into the kernel proper or into a separate boot binary, +# but in either case, it executes before the kernel does (with MMU disabled) so +# things like ftrace and stack-protector are likely to cause trouble if left +# enabled, even if doing so doesn't break the build. +# +cflags-$(CONFIG_X86_32) := -march=i386 +cflags-$(CONFIG_X86_64) := -mcmodel=small +cflags-$(CONFIG_X86) += -m$(BITS) -D__KERNEL__ $(LINUX_INCLUDE) -O2 \ + -fPIC -fno-strict-aliasing -mno-red-zone \ + -mno-mmx -mno-sse -DDISABLE_BRANCH_PROFILING + +cflags-$(CONFIG_ARM64) := $(subst -pg,,$(KBUILD_CFLAGS)) +cflags-$(CONFIG_ARM) := $(subst -pg,,$(KBUILD_CFLAGS)) \ + -fno-builtin -fpic -mno-single-pic-base + +KBUILD_CFLAGS := $(cflags-y) \ + $(call cc-option,-ffreestanding) \ + $(call cc-option,-fno-stack-protector) + +GCOV_PROFILE := n + +lib-y := efi-stub-helper.o +lib-$(CONFIG_EFI_ARMSTUB) += arm-stub.o fdt.o + +CFLAGS_fdt.o += -I$(srctree)/scripts/dtc/libfdt/ diff --git a/drivers/firmware/efi/arm-stub.c b/drivers/firmware/efi/libstub/arm-stub.c index 480339b6b110..480339b6b110 100644 --- a/drivers/firmware/efi/arm-stub.c +++ b/drivers/firmware/efi/libstub/arm-stub.c diff --git a/drivers/firmware/efi/efi-stub-helper.c b/drivers/firmware/efi/libstub/efi-stub-helper.c index 32d5cca30f49..32d5cca30f49 100644 --- a/drivers/firmware/efi/efi-stub-helper.c +++ b/drivers/firmware/efi/libstub/efi-stub-helper.c diff --git a/drivers/firmware/efi/efistub.h b/drivers/firmware/efi/libstub/efistub.h index 304ab295ca1a..304ab295ca1a 100644 --- a/drivers/firmware/efi/efistub.h +++ b/drivers/firmware/efi/libstub/efistub.h diff --git a/drivers/firmware/efi/fdt.c b/drivers/firmware/efi/libstub/fdt.c index 86d2934840e2..86d2934840e2 100644 --- a/drivers/firmware/efi/fdt.c +++ b/drivers/firmware/efi/libstub/fdt.c |