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155 lines
4.2 KiB
155 lines
4.2 KiB
// SPDX-License-Identifier: GPL-2.0+ |
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/* |
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* (C) Copyright 2008-2011 |
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* Graeme Russ, <[email protected]> |
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* |
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* (C) Copyright 2002 |
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* Daniel Engström, Omicron Ceti AB, <[email protected]> |
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* |
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* (C) Copyright 2002 |
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* Wolfgang Denk, DENX Software Engineering, <[email protected]> |
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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 <[email protected]> |
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*/ |
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#include <common.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 %lX\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, limit %lX\n", |
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re_src, re_src->r_offset, offset_ptr_ram, |
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*offset_ptr_ram, 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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