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x86: Support building the EFI stub 

Add support for building a 32/64-bit EFI stub for x86. This involves
building the startup and relocation code for either i386 or x86_64.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
This commit is contained in:
Simon Glass 2015-08-04 12:33:53 -06:00
parent 476476e73b
commit b997abd3f0
2 changed files with 25 additions and 1 deletions
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2
arch/x86/lib/Makefile
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@ -34,7 +34,7 @@ obj-$(CONFIG_SYS_X86_TSC_TIMER) += tsc_timer.o
obj-$(CONFIG_CMD_ZBOOT) += zimage.o
obj-$(CONFIG_HAVE_FSP) += fsp/
extra-$(CONFIG_USE_PRIVATE_LIBGCC) := lib.a
extra-$(CONFIG_USE_PRIVATE_LIBGCC) += lib.a
NORMAL_LIBGCC = $(shell $(CC) $(PLATFORM_CPPFLAGS) -print-libgcc-file-name)
OBJCOPYFLAGS := --prefix-symbols=__normal_

24
arch/x86/lib/efi/Makefile Normal file
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@ -0,0 +1,24 @@
#
# (C) Copyright 2002-2006
# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
#
# SPDX-License-Identifier: GPL-2.0+
#
obj-$(CONFIG_EFI_APP) += crt0-efi-ia32.o reloc_ia32.o
ifneq ($(CONFIG_EFI_STUB),)
CFLAGS_REMOVE_reloc_ia32.o += -mregparm=3
CFLAGS_reloc_ia32.o += -fpic -fshort-wchar
# When building for 64-bit we must remove the i386-specific flags
CFLAGS_REMOVE_reloc_x86_64.o += -mregparm=3 -march=i386 -m32
CFLAGS_reloc_x86_64.o += -fpic -fshort-wchar
AFLAGS_REMOVE_crt0-efi-x86_64.o += -mregparm=3 -march=i386 -m32
AFLAGS_crt0-efi-x86_64.o += -fpic -fshort-wchar
extra-$(CONFIG_EFI_STUB_32BIT) += crt0-efi-ia32.o reloc_ia32.o
extra-$(CONFIG_EFI_STUB_64BIT) += crt0-efi-x86_64.o reloc_x86_64.o
endif