1 // SPDX-License-Identifier: GPL-2.0-or-later 1
2 /*
3 * OpenRISC module.c
4 *
5 * Linux architectural port borrowing liberall
6 * others. All original copyrights apply as p
7 * declaration.
8 *
9 * Modifications for the OpenRISC architecture
10 * Copyright (C) 2010-2011 Jonas Bonn <jonas@s
11 */
12
13 #include <linux/moduleloader.h>
14 #include <linux/elf.h>
15
16 int apply_relocate_add(Elf32_Shdr *sechdrs,
17 const char *strtab,
18 unsigned int symindex,
19 unsigned int relsec,
20 struct module *me)
21 {
22 unsigned int i;
23 Elf32_Rela *rel = (void *)sechdrs[rels
24 Elf32_Sym *sym;
25 uint32_t *location;
26 uint32_t value;
27
28 pr_debug("Applying relocate section %u
29 sechdrs[relsec].sh_info);
30 for (i = 0; i < sechdrs[relsec].sh_siz
31 /* This is where to make the c
32 location = (void *)sechdrs[sec
33 + rel[i].r_offset;
34
35 /* This is the symbol it is re
36 undefined symbols have been
37 sym = (Elf32_Sym *)sechdrs[sym
38 + ELF32_R_SYM(rel[i].r
39 value = sym->st_value + rel[i]
40
41 switch (ELF32_R_TYPE(rel[i].r_
42 case R_OR1K_32:
43 *location = value;
44 break;
45 case R_OR1K_LO_16_IN_INSN:
46 *((uint16_t *)location
47 break;
48 case R_OR1K_HI_16_IN_INSN:
49 *((uint16_t *)location
50 break;
51 case R_OR1K_INSN_REL_26:
52 value -= (uint32_t)loc
53 value >>= 2;
54 value &= 0x03ffffff;
55 value |= *location & 0
56 *location = value;
57 break;
58 case R_OR1K_AHI16:
59 /* Adjust the operand
60 value += 0x8000;
61 *((uint16_t *)location
62 break;
63 case R_OR1K_SLO16:
64 /* Split value lower 1
65 value = ((value & 0xf8
66 *location = (*location
67 break;
68 default:
69 pr_err("module %s: Unk
70 me->name, ELF32
71 break;
72 }
73 }
74
75 return 0;
76 }
77
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