mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-07-09 20:56:16 +09:00
dd4611dea4
With the '-march=core2' fix, it seems that we have some luck that the 64-bit U-Boot boots again. However if we examine the disassembly codes there are still SSE instructions elsewhere which means passing cpu type to GCC is not enough to prevent it from generating these instructions. A simple test case is doing a 'bootefi selftest' from the U-Boot shell and it leads to a reset too. The 'bootefi selftest' reset is even seen with the image created by the relative older GCC 5.4.0, the one shipped by Ubuntu 16.04. The reset actually originates from undefined instruction exception caused by these SSE instructions. To keep U-Boot as a bootloader as simple as possible, we don't want to handle such advanced SIMD stuff. To make sure no MMX/SSE instruction sets are generated, tell GCC not to do this. Note AVX is out of the question as CORE2 is old enough to support AVX yet. Signed-off-by: Bin Meng <bmeng.cn@gmail.com> Reviewed-by: Heinrich Schuchardt <xypron.glpk@gmx.de> Reviewed-by: Simon Glass <sjg@chromium.org>
120 lines
2.7 KiB
Makefile
120 lines
2.7 KiB
Makefile
# SPDX-License-Identifier: GPL-2.0+
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#
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# (C) Copyright 2000-2002
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# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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CONFIG_STANDALONE_LOAD_ADDR ?= 0x40000
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PLATFORM_CPPFLAGS += -fomit-frame-pointer
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PF_CPPFLAGS_X86 := $(call cc-option, -fno-toplevel-reorder, \
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$(call cc-option, -fno-unit-at-a-time))
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PLATFORM_CPPFLAGS += $(PF_CPPFLAGS_X86)
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PLATFORM_CPPFLAGS += -fno-dwarf2-cfi-asm
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ifdef CONFIG_SPL_BUILD
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IS_32BIT := y
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else
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ifndef CONFIG_X86_64
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IS_32BIT := y
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endif
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endif
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ifeq ($(IS_32BIT),y)
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PLATFORM_CPPFLAGS += -march=i386 -m32
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else
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PLATFORM_CPPFLAGS += $(if $(CONFIG_SPL_BUILD),,-fpic) -fno-common -march=core2 -m64
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PLATFORM_CPPFLAGS += -mno-mmx -mno-sse
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endif
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PLATFORM_RELFLAGS += -fdata-sections -ffunction-sections -fvisibility=hidden
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PLATFORM_LDFLAGS += -Bsymbolic -Bsymbolic-functions
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PLATFORM_LDFLAGS += -m $(if $(IS_32BIT),elf_i386,elf_x86_64)
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# This is used in the top-level Makefile which does not include
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# PLATFORM_LDFLAGS
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LDFLAGS_EFI_PAYLOAD := -Bsymbolic -Bsymbolic-functions -shared --no-undefined
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OBJCOPYFLAGS_EFI := -j .text -j .sdata -j .data -j .dynamic -j .dynsym \
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-j .rel -j .rela -j .reloc
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ifeq ($(IS_32BIT),y)
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CFLAGS_NON_EFI := -mregparm=3
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endif
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CFLAGS_EFI := -fpic -fshort-wchar
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ifeq ($(CONFIG_EFI_STUB_64BIT),)
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CFLAGS_EFI += $(call cc-option, -mno-red-zone)
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EFIARCH = ia32
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EFIPAYLOAD_BFDTARGET = elf32-i386
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else
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EFIARCH = x86_64
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EFIPAYLOAD_BFDTARGET = elf64-x86-64
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endif
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EFIPAYLOAD_BFDARCH = i386
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LDSCRIPT_EFI := $(srctree)/arch/x86/lib/elf_$(EFIARCH)_efi.lds
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EFISTUB := crt0_$(EFIARCH)_efi.o reloc_$(EFIARCH)_efi.o
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OBJCOPYFLAGS_EFI += --target=efi-app-$(EFIARCH)
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CPPFLAGS_REMOVE_crt0-efi-$(EFIARCH).o += $(CFLAGS_NON_EFI)
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CPPFLAGS_crt0-efi-$(EFIARCH).o += $(CFLAGS_EFI)
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ifeq ($(CONFIG_EFI_APP),y)
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PLATFORM_CPPFLAGS += $(CFLAGS_EFI)
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LDFLAGS_FINAL += -znocombreloc -shared
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LDSCRIPT := $(LDSCRIPT_EFI)
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else
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PLATFORM_CPPFLAGS += $(CFLAGS_NON_EFI)
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PLATFORM_LDFLAGS += --emit-relocs
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LDFLAGS_FINAL += --gc-sections $(if $(CONFIG_SPL_BUILD),,-pie)
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endif
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ifdef CONFIG_X86_64
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ifndef CONFIG_SPL_BUILD
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PLATFORM_CPPFLAGS += -D__x86_64__
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else
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PLATFORM_CPPFLAGS += -D__I386__
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endif
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else
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PLATFORM_CPPFLAGS += -D__I386__
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endif
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ifdef CONFIG_EFI_STUB
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ifdef CONFIG_EFI_STUB_64BIT
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EFI_LDS := elf_x86_64_efi.lds
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EFI_CRT0 := crt0_x86_64_efi.o
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EFI_RELOC := reloc_x86_64_efi.o
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else
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EFI_LDS := elf_ia32_efi.lds
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EFI_CRT0 := crt0_ia32_efi.o
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EFI_RELOC := reloc_ia32_efi.o
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endif
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else
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ifdef CONFIG_X86_64
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EFI_LDS := elf_x86_64_efi.lds
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EFI_CRT0 := crt0_x86_64_efi.o
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EFI_RELOC := reloc_x86_64_efi.o
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else
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EFI_LDS := elf_ia32_efi.lds
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EFI_CRT0 := crt0_ia32_efi.o
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EFI_RELOC := reloc_ia32_efi.o
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endif
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endif
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ifdef CONFIG_X86_64
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EFI_TARGET := --target=efi-app-x86_64
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else
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EFI_TARGET := --target=efi-app-ia32
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endif
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