blob: 5b1b420a643373888b9908a8955de3bd344aa481 [file] [log] [blame]
Tom Rini83d290c2018-05-06 17:58:06 -04001// SPDX-License-Identifier: GPL-2.0+
Graeme Russb156ff02011-12-23 15:57:58 +11002/*
3 * (C) Copyright 2008-2011
4 * Graeme Russ, <graeme.russ@gmail.com>
5 *
6 * (C) Copyright 2002
7 * Daniel Engström, Omicron Ceti AB, <daniel@omicron.se>
8 *
9 * (C) Copyright 2002
10 * Wolfgang Denk, DENX Software Engineering, <wd@denx.de>
11 *
12 * (C) Copyright 2002
13 * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
14 * Marius Groeger <mgroeger@sysgo.de>
Graeme Russb156ff02011-12-23 15:57:58 +110015 */
16
17#include <common.h>
Simon Glassf7ae49f2020-05-10 11:40:05 -060018#include <log.h>
Simon Glasse47b2d62017-03-31 08:40:38 -060019#include <relocate.h>
Simon Glass401d1c42020-10-30 21:38:53 -060020#include <asm/global_data.h>
Graeme Russb156ff02011-12-23 15:57:58 +110021#include <asm/u-boot-x86.h>
Simon Glass86cfb6b2013-03-05 14:39:54 +000022#include <asm/sections.h>
Graeme Russb156ff02011-12-23 15:57:58 +110023#include <elf.h>
24
Simon Glass7282d832013-04-17 16:13:33 +000025DECLARE_GLOBAL_DATA_PTR;
26
Graeme Russa1d57b72011-12-23 21:14:22 +110027int copy_uboot_to_ram(void)
Graeme Russb156ff02011-12-23 15:57:58 +110028{
Simon Glassf196bd22017-01-16 07:03:55 -070029 size_t len = (uintptr_t)&__data_end - (uintptr_t)&__text_start;
Graeme Russb156ff02011-12-23 15:57:58 +110030
Simon Glass981dca62015-08-04 12:33:44 -060031 if (gd->flags & GD_FLG_SKIP_RELOC)
32 return 0;
Graeme Russb156ff02011-12-23 15:57:58 +110033 memcpy((void *)gd->relocaddr, (void *)&__text_start, len);
34
35 return 0;
36}
37
Simon Glass450ce562022-01-04 03:51:13 -070038#ifndef CONFIG_EFI_APP
Graeme Russa1d57b72011-12-23 21:14:22 +110039int clear_bss(void)
Graeme Russb156ff02011-12-23 15:57:58 +110040{
41 ulong dst_addr = (ulong)&__bss_start + gd->reloc_off;
Simon Glassf196bd22017-01-16 07:03:55 -070042 size_t len = (uintptr_t)&__bss_end - (uintptr_t)&__bss_start;
Graeme Russb156ff02011-12-23 15:57:58 +110043
Simon Glass981dca62015-08-04 12:33:44 -060044 if (gd->flags & GD_FLG_SKIP_RELOC)
45 return 0;
Graeme Russb156ff02011-12-23 15:57:58 +110046 memset((void *)dst_addr, 0x00, len);
47
48 return 0;
49}
Simon Glass450ce562022-01-04 03:51:13 -070050#endif
Graeme Russb156ff02011-12-23 15:57:58 +110051
Simon Glassb50b1632017-01-16 07:03:54 -070052#if CONFIG_IS_ENABLED(X86_64)
53static void do_elf_reloc_fixups64(unsigned int text_base, uintptr_t size,
54 Elf64_Rela *re_src, Elf64_Rela *re_end)
55{
56 Elf64_Addr *offset_ptr_rom, *last_offset = NULL;
57 Elf64_Addr *offset_ptr_ram;
58
59 do {
Heinrich Schuchardt80df1942018-10-13 20:52:06 -070060 unsigned long long type = ELF64_R_TYPE(re_src->r_info);
61
62 if (type != R_X86_64_RELATIVE) {
63 printf("%s: unsupported relocation type 0x%llx "
64 "at %p, ", __func__, type, re_src);
65 printf("offset = 0x%llx\n", re_src->r_offset);
66 continue;
67 }
68
Simon Glassb50b1632017-01-16 07:03:54 -070069 /* Get the location from the relocation entry */
70 offset_ptr_rom = (Elf64_Addr *)(uintptr_t)re_src->r_offset;
71
72 /* Check that the location of the relocation is in .text */
73 if (offset_ptr_rom >= (Elf64_Addr *)(uintptr_t)text_base &&
74 offset_ptr_rom > last_offset) {
75 /* Switch to the in-RAM version */
76 offset_ptr_ram = (Elf64_Addr *)((ulong)offset_ptr_rom +
77 gd->reloc_off);
78
79 /* Check that the target points into .text */
80 if (*offset_ptr_ram >= text_base &&
81 *offset_ptr_ram <= text_base + size) {
82 *offset_ptr_ram = gd->reloc_off +
83 re_src->r_addend;
84 } else {
Masahiro Yamadadee37fc2018-08-06 20:47:40 +090085 debug(" %p: %lx: rom reloc %lx, ram %p, value %lx, limit %lX\n",
Simon Glassb50b1632017-01-16 07:03:54 -070086 re_src, (ulong)re_src->r_info,
87 (ulong)re_src->r_offset, offset_ptr_ram,
88 (ulong)*offset_ptr_ram, text_base + size);
89 }
90 } else {
91 debug(" %p: %lx: rom reloc %lx, last %p\n", re_src,
92 (ulong)re_src->r_info, (ulong)re_src->r_offset,
93 last_offset);
94 }
95 last_offset = offset_ptr_rom;
96
97 } while (++re_src < re_end);
98}
99#else
Simon Glassdc7e2132017-01-16 07:03:53 -0700100static void do_elf_reloc_fixups32(unsigned int text_base, uintptr_t size,
101 Elf32_Rel *re_src, Elf32_Rel *re_end)
Graeme Russb156ff02011-12-23 15:57:58 +1100102{
Simon Glass62f79702013-02-28 19:26:16 +0000103 Elf32_Addr *offset_ptr_rom, *last_offset = NULL;
Graeme Russb156ff02011-12-23 15:57:58 +1100104 Elf32_Addr *offset_ptr_ram;
105
Graeme Russb156ff02011-12-23 15:57:58 +1100106 do {
Heinrich Schuchardt80df1942018-10-13 20:52:06 -0700107 unsigned int type = ELF32_R_TYPE(re_src->r_info);
108
109 if (type != R_386_RELATIVE) {
110 printf("%s: unsupported relocation type 0x%x "
111 "at %p, ", __func__, type, re_src);
112 printf("offset = 0x%x\n", re_src->r_offset);
113 continue;
114 }
115
Graeme Russb156ff02011-12-23 15:57:58 +1100116 /* Get the location from the relocation entry */
Simon Glassdc7e2132017-01-16 07:03:53 -0700117 offset_ptr_rom = (Elf32_Addr *)(uintptr_t)re_src->r_offset;
Graeme Russb156ff02011-12-23 15:57:58 +1100118
119 /* Check that the location of the relocation is in .text */
Simon Glassdc7e2132017-01-16 07:03:53 -0700120 if (offset_ptr_rom >= (Elf32_Addr *)(uintptr_t)text_base &&
Simon Glassa42bfe02015-08-04 12:33:49 -0600121 offset_ptr_rom > last_offset) {
Graeme Russb156ff02011-12-23 15:57:58 +1100122
123 /* Switch to the in-RAM version */
124 offset_ptr_ram = (Elf32_Addr *)((ulong)offset_ptr_rom +
125 gd->reloc_off);
126
127 /* Check that the target points into .text */
Simon Glassa42bfe02015-08-04 12:33:49 -0600128 if (*offset_ptr_ram >= text_base &&
129 *offset_ptr_ram <= text_base + size) {
Graeme Russb156ff02011-12-23 15:57:58 +1100130 *offset_ptr_ram += gd->reloc_off;
Simon Glass62f79702013-02-28 19:26:16 +0000131 } else {
Masahiro Yamadadee37fc2018-08-06 20:47:40 +0900132 debug(" %p: rom reloc %x, ram %p, value %x, limit %lX\n",
133 re_src, re_src->r_offset, offset_ptr_ram,
134 *offset_ptr_ram, text_base + size);
Graeme Russb156ff02011-12-23 15:57:58 +1100135 }
Simon Glass62f79702013-02-28 19:26:16 +0000136 } else {
137 debug(" %p: rom reloc %x, last %p\n", re_src,
138 re_src->r_offset, last_offset);
Graeme Russb156ff02011-12-23 15:57:58 +1100139 }
Simon Glass62f79702013-02-28 19:26:16 +0000140 last_offset = offset_ptr_rom;
141
Duncan Laurie0c392902012-10-23 18:04:43 +0000142 } while (++re_src < re_end);
Simon Glassdc7e2132017-01-16 07:03:53 -0700143}
Simon Glassb50b1632017-01-16 07:03:54 -0700144#endif
Simon Glassdc7e2132017-01-16 07:03:53 -0700145
146/*
147 * This function has more error checking than you might expect. Please see
148 * this commit message for more information:
149 * 62f7970a x86: Add error checking to x86 relocation code
150 */
151int do_elf_reloc_fixups(void)
152{
153 void *re_src = (void *)(&__rel_dyn_start);
154 void *re_end = (void *)(&__rel_dyn_end);
155 uint text_base;
156
157 /* The size of the region of u-boot that runs out of RAM. */
158 uintptr_t size = (uintptr_t)&__bss_end - (uintptr_t)&__text_start;
159
160 if (gd->flags & GD_FLG_SKIP_RELOC)
161 return 0;
162 if (re_src == re_end)
163 panic("No relocation data");
164
Simon Glass98463902022-10-20 18:22:39 -0600165#ifdef CONFIG_TEXT_BASE
166 text_base = CONFIG_TEXT_BASE;
Simon Glassdc7e2132017-01-16 07:03:53 -0700167#else
Simon Glass98463902022-10-20 18:22:39 -0600168 panic("No CONFIG_TEXT_BASE");
Simon Glassdc7e2132017-01-16 07:03:53 -0700169#endif
Simon Glassb50b1632017-01-16 07:03:54 -0700170#if CONFIG_IS_ENABLED(X86_64)
171 do_elf_reloc_fixups64(text_base, size, re_src, re_end);
172#else
Simon Glassdc7e2132017-01-16 07:03:53 -0700173 do_elf_reloc_fixups32(text_base, size, re_src, re_end);
Simon Glassb50b1632017-01-16 07:03:54 -0700174#endif
Graeme Russb156ff02011-12-23 15:57:58 +1100175
176 return 0;
177}