mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-07-13 14:46:21 +09:00
1c91a3d979
* use better symbols for relocatable region boundaries
("__image_copy_start" instead of "CONFIG_SYS_TEXT_BASE")
* remove useless debug messages because they will only show up in case
of both problem (when normal "if" branch won't be taken) and DEBUG take
place which is pretty rare situation.
Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
70 lines
1.8 KiB
C
70 lines
1.8 KiB
C
/*
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* Copyright (C) 2013-2014 Synopsys, Inc. All rights reserved.
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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 <elf.h>
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#include <asm/sections.h>
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DECLARE_GLOBAL_DATA_PTR;
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/*
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* Base functionality is taken from x86 version with added ARC-specifics
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*/
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int do_elf_reloc_fixups(void)
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{
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Elf32_Rela *re_src = (Elf32_Rela *)(&__rel_dyn_start);
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Elf32_Rela *re_end = (Elf32_Rela *)(&__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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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 *)&__image_copy_start &&
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offset_ptr_rom > last_offset) {
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unsigned int val;
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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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/*
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* Use "memcpy" because target location might be
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* 16-bit aligned on ARC so we may need to read
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* byte-by-byte. On attempt to read entire word by
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* CPU throws an exception
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*/
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memcpy(&val, offset_ptr_ram, sizeof(int));
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#ifdef __LITTLE_ENDIAN__
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/* If location in ".text" section swap value */
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if ((unsigned int)offset_ptr_rom <
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(unsigned int)&__ivt_end)
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val = (val << 16) | (val >> 16);
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#endif
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/* Check that the target points into executable */
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if (val >= (unsigned int)&__image_copy_start && val <=
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(unsigned int)&__image_copy_end) {
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val += gd->reloc_off;
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#ifdef __LITTLE_ENDIAN__
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/* If location in ".text" section swap value */
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if ((unsigned int)offset_ptr_rom <
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(unsigned int)&__ivt_end)
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val = (val << 16) | (val >> 16);
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#endif
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memcpy(offset_ptr_ram, &val, sizeof(int));
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}
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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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