1 /*
2 * Copyright (c) 2006-2024 RT-Thread Development Team
3 *
4 * SPDX-License-Identifier: Apache-2.0
5 *
6 * Change Logs:
7 * Date Author Notes
8 * 2018/09/15 parai first version
9 */
10
11 #include "../dlmodule.h"
12 #include "../dlelf.h"
13
14 #ifdef __i386__
15
16 #define DBG_TAG "posix.libdl.arch"
17 #define DBG_LVL DBG_INFO
18 #include <rtdbg.h>
19
20 #define R_X86_64_GLOB_DAT 6 /* Create GOT entry */
21 #define R_X86_64_JUMP_SLOT 7 /* Create PLT entry */
22 #define R_X86_64_RELATIVE 8 /* Adjust by program base */
dlmodule_relocate(struct rt_dlmodule * module,Elf32_Rel * rel,Elf32_Addr sym_val)23 int dlmodule_relocate(struct rt_dlmodule *module, Elf32_Rel *rel, Elf32_Addr sym_val)
24 {
25 Elf32_Addr *where, tmp;
26 Elf32_Sword addend, offset;
27 rt_uint32_t upper, lower, sign, j1, j2;
28
29 where = (Elf32_Addr *)((rt_uint8_t *)module->mem_space
30 + rel->r_offset
31 - module->vstart_addr);
32
33 switch (ELF32_R_TYPE(rel->r_info))
34 {
35 case R_X86_64_GLOB_DAT:
36 case R_X86_64_JUMP_SLOT:
37 *where = (Elf32_Addr)sym_val;
38
39 LOG_D("R_X86_64_JUMP_SLOT: 0x%x -> 0x%x 0x%x",
40 (uint32_t)where, *where, sym_val);
41 break;
42 case R_X86_64_RELATIVE:
43 *where = (Elf32_Addr)sym_val + *where;
44 LOG_D("R_X86_64_RELATIVE: 0x%x -> 0x%x 0x%x",
45 (uint32_t)where, *where, sym_val);
46 break;
47 default:
48 LOG_D("X86ELF: invalid relocate TYPE %d", ELF32_R_TYPE(rel->r_info));
49 return -1;
50 }
51
52 return 0;
53 }
54
55 #endif /* __i386__ */
56