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https://github.com/AsahiLinux/u-boot
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d58c007498
Microblaze is using NEEDS_MANUAL_RELOC from the beginnging. This is causing issues with function pointer arrays which need to be updated manually after relocation. Building code with -fPIC and linking with -pic will remove this limitation and there is no longer need to run manual update. By default still old option is enabled but by disabling NEEDS_MANUAL_RELOC code will be compiled for full relocation. The patch does couple of things which are connected to each other. - Define STATIC_RELA dependency to call relocate-rela to fill sections. - REMAKE_ELF was already enabled but u-boot file can't be used because sections are empty. relocate-rela will fill them and output file is u-boot.elf which should be used. - Add support for full relocation (u-boot.elf) - Add support for early relocation when u-boot.bin is loaded to different address then CONFIG_SYS_TEXT_BASE - Add rela.dyn and dynsym sections Disabling NEEDS_MANUAL_RELOC U-Boot size increased by 10% of it's original size (550kB to 608kB). Signed-off-by: Michal Simek <michal.simek@amd.com> Link: https://lore.kernel.org/r/a845670b34925859b2e321875f7588a29f6655f9.1655299267.git.michal.simek@amd.com
29 lines
722 B
Makefile
29 lines
722 B
Makefile
# SPDX-License-Identifier: GPL-2.0+
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#
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# (C) Copyright 2007-2008 Michal Simek
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# Michal SIMEK <monstr@monstr.eu>
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#
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# (C) Copyright 2004 Atmark Techno, Inc.
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# Yasushi SHOJI <yashi@atmark-techno.com>
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CONFIG_STANDALONE_LOAD_ADDR ?= 0x80F00000
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PLATFORM_CPPFLAGS += -ffixed-r31 -D__microblaze__
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PLATFORM_CPPFLAGS += -fdata-sections -ffunction-sections
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LDFLAGS_FINAL += --gc-sections
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ifeq ($(CONFIG_SPL_BUILD),)
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PLATFORM_CPPFLAGS += -fPIC
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endif
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ifeq ($(CONFIG_STATIC_RELA),y)
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PLATFORM_CPPFLAGS += -fPIC
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LDFLAGS_u-boot += -pic
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endif
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ifeq ($(CONFIG_SYS_LITTLE_ENDIAN),y)
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PLATFORM_ELFFLAGS += -B microblaze $(OBJCOPYFLAGS) -O elf32-microblazeel
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else
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PLATFORM_ELFFLAGS += -B microblaze $(OBJCOPYFLAGS) -O elf32-microblaze
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endif
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