1 /*
2 * Copyright (c) 2006-2018, 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 R_X86_64_GLOB_DAT 6 /* Create GOT entry */
17 #define R_X86_64_JUMP_SLOT 7 /* Create PLT entry */
18 #define R_X86_64_RELATIVE 8 /* Adjust by program base */
dlmodule_relocate(struct rt_dlmodule * module,Elf32_Rel * rel,Elf32_Addr sym_val)19 int dlmodule_relocate(struct rt_dlmodule *module, Elf32_Rel *rel, Elf32_Addr sym_val)
20 {
21 Elf32_Addr *where, tmp;
22 Elf32_Sword addend, offset;
23 rt_uint32_t upper, lower, sign, j1, j2;
24
25 where = (Elf32_Addr *)((rt_uint8_t *)module->mem_space
26 + rel->r_offset
27 - module->vstart_addr);
28
29 switch (ELF32_R_TYPE(rel->r_info))
30 {
31 case R_X86_64_GLOB_DAT:
32 case R_X86_64_JUMP_SLOT:
33 *where = (Elf32_Addr)sym_val;
34
35 RT_DEBUG_LOG(RT_DEBUG_MODULE, ("R_X86_64_JUMP_SLOT: 0x%x -> 0x%x 0x%x\n",
36 (uint32_t)where, *where, sym_val));
37 break;
38 case R_X86_64_RELATIVE:
39 *where = (Elf32_Addr)sym_val + *where;
40 RT_DEBUG_LOG(RT_DEBUG_MODULE, ("R_X86_64_RELATIVE: 0x%x -> 0x%x 0x%x\n",
41 (uint32_t)where, *where, sym_val));
42 break;
43 default:
44 RT_DEBUG_LOG(RT_DEBUG_MODULE, ("X86ELF: invalid relocate TYPE %d\n", ELF32_R_TYPE(rel->r_info)));
45 return -1;
46 }
47
48 return 0;
49 }
50 #endif
51