From: Ben Stoltz <sto...@google.com>
Adjust the tool chain flags to build U-Boot as a relocatable shared library,
as required by EFI.
Signed-off-by: Ben Stoltz <sto...@google.com>
Signed-off-by: Simon Glass <s...@chromium.org>
---
arch/x86/config.mk | 35 ++++++++++++++++++++++++++++++++---
1 file changed, 32 insertions(+), 3 deletions(-)
diff --git a/arch/x86/config.mk b/arch/x86/config.mk
index 999143e..bb0b254 100644
--- a/arch/x86/config.mk
+++ b/arch/x86/config.mk
@@ -8,19 +8,48 @@
CONFIG_STANDALONE_LOAD_ADDR ?= 0x40000
PLATFORM_CPPFLAGS += -fno-strict-aliasing
-PLATFORM_CPPFLAGS += -mregparm=3
PLATFORM_CPPFLAGS += -fomit-frame-pointer
PF_CPPFLAGS_X86 := $(call cc-option, -fno-toplevel-reorder, \
$(call cc-option, -fno-unit-at-a-time)) \
$(call cc-option, -mpreferred-stack-boundary=2)
+
PLATFORM_CPPFLAGS += $(PF_CPPFLAGS_X86)
PLATFORM_CPPFLAGS += -fno-dwarf2-cfi-asm
PLATFORM_CPPFLAGS += -march=i386 -m32
PLATFORM_RELFLAGS += -ffunction-sections -fvisibility=hidden
-PLATFORM_LDFLAGS += --emit-relocs -Bsymbolic -Bsymbolic-functions -m elf_i386
+PLATFORM_LDFLAGS += -Bsymbolic -Bsymbolic-functions
-LDFLAGS_FINAL += --gc-sections -pie
LDFLAGS_FINAL += --wrap=__divdi3 --wrap=__udivdi3
LDFLAGS_FINAL += --wrap=__moddi3 --wrap=__umoddi3
+
+LDFLAGS_EFI := -Bsymbolic -Bsymbolic-functions -znocombreloc -shared \
+ --no-undefined
+
+OBJCOPYFLAGS_EFI := -j .text -j .sdata -j .data -j .dynamic -j .dynsym \
+ -j .rel -j .rela -j .reloc
+
+CFLAGS_NON_EFI := -mregparm=3
+CFLAGS_EFI := -fpic -fshort-wchar $(call cc-option, -mno-red-zone)
+
+EFIARCH=ia32
+
+LDSCRIPT_EFI := $(srctree)/$(CPUDIR)/efi/elf_$(EFIARCH)_efi.lds
+OBJCOPYFLAGS_EFI += --target=efi-app-$(EFIARCH)
+
+ifeq ($(CONFIG_ARCH_EFI),y)
+
+PLATFORM_CPPFLAGS += $(CFLAGS_EFI)
+PLATFORM_LDFLAGS += -m elf_i386
+LDFLAGS_FINAL += -znocombreloc -shared
+OBJCOPYFLAGS_EFI += --target=efi-app-$(EFIARCH)
+LDSCRIPT := $(LDSCRIPT_EFI)
+
+else
+
+PLATFORM_CPPFLAGS += $(CFLAGS_NON_EFI)
+PLATFORM_LDFLAGS += --emit-relocs -m elf_i386
+LDFLAGS_FINAL += --gc-sections -pie
+
+endif
--
2.4.3.573.g4eafbef
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