mirror of
https://github.com/brain-hackers/u-boot-brain
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83d290c56f
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
160 lines
4.2 KiB
C
160 lines
4.2 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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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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#include <common.h>
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#include <inttypes.h>
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#include <relocate.h>
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#include <asm/u-boot-x86.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 = (uintptr_t)&__data_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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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 = (uintptr_t)&__bss_end - (uintptr_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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#if CONFIG_IS_ENABLED(X86_64)
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static void do_elf_reloc_fixups64(unsigned int text_base, uintptr_t size,
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Elf64_Rela *re_src, Elf64_Rela *re_end)
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{
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Elf64_Addr *offset_ptr_rom, *last_offset = NULL;
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Elf64_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 = (Elf64_Addr *)(uintptr_t)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 >= (Elf64_Addr *)(uintptr_t)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 = (Elf64_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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re_src->r_addend;
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} else {
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debug(" %p: %lx: rom reloc %lx, ram %p, value %lx, limit %"
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PRIXPTR "\n",
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re_src, (ulong)re_src->r_info,
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(ulong)re_src->r_offset, offset_ptr_ram,
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(ulong)*offset_ptr_ram, text_base + size);
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}
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} else {
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debug(" %p: %lx: rom reloc %lx, last %p\n", re_src,
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(ulong)re_src->r_info, (ulong)re_src->r_offset,
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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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}
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#else
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static void do_elf_reloc_fixups32(unsigned int text_base, uintptr_t size,
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Elf32_Rel *re_src, Elf32_Rel *re_end)
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{
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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 *)(uintptr_t)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 *)(uintptr_t)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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}
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#endif
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/*
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* This function has more error checking than you might expect. Please see
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* this commit message for more information:
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* 62f7970a x86: Add error checking to x86 relocation code
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*/
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int do_elf_reloc_fixups(void)
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{
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void *re_src = (void *)(&__rel_dyn_start);
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void *re_end = (void *)(&__rel_dyn_end);
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uint text_base;
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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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#if CONFIG_IS_ENABLED(X86_64)
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do_elf_reloc_fixups64(text_base, size, re_src, re_end);
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#else
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do_elf_reloc_fixups32(text_base, size, re_src, re_end);
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#endif
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return 0;
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}
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