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| author | Bin Meng <bmeng.cn@gmail.com> | 2017-07-27 06:12:35 -0700 |
|---|---|---|
| committer | Bin Meng <bmeng.cn@gmail.com> | 2017-08-01 20:17:02 +0800 |
| commit | e719b6b0f8fa5c6f3f4aeaa319dcf17d735153f8 (patch) | |
| tree | dbb66060302447fdbc77e1a37312f3c1ab4cff5e /arch/x86/config.mk | |
| parent | 9a95f51ffecc8ff9cf09db1615c1a580731b722f (diff) | |
x86: Enforce toolchain to generate 64-bit codes for 64-bit U-Boot
64-bit U-Boot image is a combination of 32-bit U-Boot (SPL) plus
64-bit U-Boot (proper). For the U-Boot proper, it has be compiled
to 64-bit object codes. Attempting to use a toolchain to compile
64-bit U-Boot for qemu-x86_64, like kernel.org 4.9 i386-linux-gcc,
fails with the following errors:
arch/x86/cpu/intel_common/microcode.c:79:2: error: PIC register
clobbered by 'ebx' in 'asm'
The issue is because toolchain is preconfigured to generate code
for the 32-bit architecture (i386), and currently '-m64' is missing
in the makefile fragment. Using kernel.org 4.9 x86_64-linux-gcc
works out of the box, since it is preconfigured to generate 64-bit
codes.
When compiling U-Boot SPL, '-m32' is passed to the toolchain, no
mater 32-bit (i386-linux-) or 64-bit (x86_64-linux) the toolchain
is preconfigured to generate.
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'arch/x86/config.mk')
| -rw-r--r-- | arch/x86/config.mk | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/config.mk b/arch/x86/config.mk index 043425e5e3..8835dcf36f 100644 --- a/arch/x86/config.mk +++ b/arch/x86/config.mk @@ -26,7 +26,7 @@ endif ifeq ($(IS_32BIT),y) PLATFORM_CPPFLAGS += -march=i386 -m32 else -PLATFORM_CPPFLAGS += $(if $(CONFIG_SPL_BUILD),,-fpic) -fno-common +PLATFORM_CPPFLAGS += $(if $(CONFIG_SPL_BUILD),,-fpic) -fno-common -m64 endif PLATFORM_RELFLAGS += -ffunction-sections -fvisibility=hidden |