forked from rrcarlosr/Jetpack
109 lines
2.6 KiB
C
109 lines
2.6 KiB
C
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/*
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* (C) Copyright 2008-2011
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* Graeme Russ, <graeme.russ@gmail.com>
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*
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* (C) Copyright 2002
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* Daniel Engström, Omicron Ceti AB, <daniel@omicron.se>
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*
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* (C) Copyright 2002
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* Wolfgang Denk, DENX Software Engineering, <wd@denx.de>
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*
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* (C) Copyright 2002
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* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
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* Marius Groeger <mgroeger@sysgo.de>
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <inttypes.h>
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#include <asm/u-boot-x86.h>
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#include <asm/relocate.h>
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#include <asm/sections.h>
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#include <elf.h>
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DECLARE_GLOBAL_DATA_PTR;
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int copy_uboot_to_ram(void)
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{
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size_t len = (size_t)&__data_end - (size_t)&__text_start;
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if (gd->flags & GD_FLG_SKIP_RELOC)
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return 0;
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memcpy((void *)gd->relocaddr, (void *)&__text_start, len);
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return 0;
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}
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int clear_bss(void)
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{
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ulong dst_addr = (ulong)&__bss_start + gd->reloc_off;
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size_t len = (size_t)&__bss_end - (size_t)&__bss_start;
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if (gd->flags & GD_FLG_SKIP_RELOC)
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return 0;
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memset((void *)dst_addr, 0x00, len);
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return 0;
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}
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/*
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* This function has more error checking than you might expect. Please see
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* the commit message for more informaiton.
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*/
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int do_elf_reloc_fixups(void)
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{
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Elf32_Rel *re_src = (Elf32_Rel *)(&__rel_dyn_start);
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Elf32_Rel *re_end = (Elf32_Rel *)(&__rel_dyn_end);
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Elf32_Addr *offset_ptr_rom, *last_offset = NULL;
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Elf32_Addr *offset_ptr_ram;
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unsigned int text_base = 0;
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/* The size of the region of u-boot that runs out of RAM. */
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uintptr_t size = (uintptr_t)&__bss_end - (uintptr_t)&__text_start;
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if (gd->flags & GD_FLG_SKIP_RELOC)
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return 0;
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if (re_src == re_end)
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panic("No relocation data");
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#ifdef CONFIG_SYS_TEXT_BASE
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text_base = CONFIG_SYS_TEXT_BASE;
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#else
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panic("No CONFIG_SYS_TEXT_BASE");
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#endif
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do {
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/* Get the location from the relocation entry */
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offset_ptr_rom = (Elf32_Addr *)re_src->r_offset;
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/* Check that the location of the relocation is in .text */
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if (offset_ptr_rom >= (Elf32_Addr *)text_base &&
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offset_ptr_rom > last_offset) {
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/* Switch to the in-RAM version */
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offset_ptr_ram = (Elf32_Addr *)((ulong)offset_ptr_rom +
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gd->reloc_off);
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/* Check that the target points into .text */
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if (*offset_ptr_ram >= text_base &&
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*offset_ptr_ram <= text_base + size) {
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*offset_ptr_ram += gd->reloc_off;
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} else {
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debug(" %p: rom reloc %x, ram %p, value %x,"
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" limit %" PRIXPTR "\n", re_src,
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re_src->r_offset, offset_ptr_ram,
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*offset_ptr_ram,
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text_base + size);
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}
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} else {
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debug(" %p: rom reloc %x, last %p\n", re_src,
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re_src->r_offset, last_offset);
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}
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last_offset = offset_ptr_rom;
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} while (++re_src < re_end);
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return 0;
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}
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