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265072ba75
Commit 79fd7e649e287228a1445820a72f7dd33baedb96
MIPS: always keep all sections in u-boot ELF binary.
Always keep all sections in u-boot ELF binary. Move all unneeded
sections after _end to avoid allocating space in the final binary.
Also remove .deadcode section which is now obsolete.
removed section .deadcode because the original symptoms were not
visible anymore. Unfortuneatly the binutils bug still exists.
The size of .rel.dyn section is often bigger than needed for all
entries. But objcopy only allocates space as much as required for all
reloc entries. Thus there is a gap between the last entry and
__rel_dyn_end in u-boot.bin. If u-boot is booted from RAM (e.g. in
SPL scenarios) that area could contain garbage data which could lead
to CPU exceptions during relocation.
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
75 lines
2.2 KiB
Makefile
75 lines
2.2 KiB
Makefile
#
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# (C) Copyright 2003
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# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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#
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# SPDX-License-Identifier: GPL-2.0+
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#
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ifdef CONFIG_SYS_BIG_ENDIAN
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32bit-emul := elf32btsmip
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64bit-emul := elf64btsmip
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32bit-bfd := elf32-tradbigmips
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64bit-bfd := elf64-tradbigmips
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PLATFORM_CPPFLAGS += -EB
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PLATFORM_LDFLAGS += -EB
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endif
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ifdef CONFIG_SYS_LITTLE_ENDIAN
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32bit-emul := elf32ltsmip
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64bit-emul := elf64ltsmip
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32bit-bfd := elf32-tradlittlemips
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64bit-bfd := elf64-tradlittlemips
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PLATFORM_CPPFLAGS += -EL
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PLATFORM_LDFLAGS += -EL
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endif
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ifdef CONFIG_32BIT
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PLATFORM_CPPFLAGS += -mabi=32
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PLATFORM_LDFLAGS += -m $(32bit-emul)
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OBJCOPYFLAGS += -O $(32bit-bfd)
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endif
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ifdef CONFIG_64BIT
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PLATFORM_CPPFLAGS += -mabi=64
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PLATFORM_LDFLAGS += -m$(64bit-emul)
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OBJCOPYFLAGS += -O $(64bit-bfd)
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endif
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cpuflags-$(CONFIG_CPU_MIPS32_R1) += -march=mips32 -Wa,-mips32
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cpuflags-$(CONFIG_CPU_MIPS32_R2) += -march=mips32r2 -Wa,-mips32r2
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cpuflags-$(CONFIG_CPU_MIPS64_R1) += -march=mips64 -Wa,-mips64
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cpuflags-$(CONFIG_CPU_MIPS64_R2) += -march=mips64r2 -Wa,-mips64r2
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PLATFORM_CPPFLAGS += $(cpuflags-y)
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PLATFORM_CPPFLAGS += -D__MIPS__
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__HAVE_ARCH_GENERIC_BOARD := y
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#
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# From Linux arch/mips/Makefile
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#
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# GCC uses -G 0 -mabicalls -fpic as default. We don't want PIC in the kernel
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# code since it only slows down the whole thing. At some point we might make
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# use of global pointer optimizations but their use of $28 conflicts with
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# the current pointer optimization.
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#
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# The DECStation requires an ECOFF kernel for remote booting, other MIPS
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# machines may also. Since BFD is incredibly buggy with respect to
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# crossformat linking we rely on the elf2ecoff tool for format conversion.
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#
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# cflags-y += -G 0 -mno-abicalls -fno-pic -pipe
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# cflags-y += -msoft-float
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# LDFLAGS_vmlinux += -G 0 -static -n -nostdlib
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# MODFLAGS += -mlong-calls
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#
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# On the other hand, we want PIC in the U-Boot code to relocate it from ROM
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# to RAM. $28 is always used as gp.
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#
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PLATFORM_CPPFLAGS += -G 0 -mabicalls -fpic
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PLATFORM_CPPFLAGS += -msoft-float
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PLATFORM_LDFLAGS += -G 0 -static -n -nostdlib
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PLATFORM_RELFLAGS += -ffunction-sections -fdata-sections
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LDFLAGS_FINAL += --gc-sections -pie
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OBJCOPYFLAGS += -j .text -j .rodata -j .data -j .got
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OBJCOPYFLAGS += -j .u_boot_list -j .rel.dyn -j .padding
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