1 // SPDX-License-Identifier: GPL-2.0 1
2 // Copyright (C) 2018 Hangzhou C-SKY Microsyst
3
4 #include <linux/moduleloader.h>
5 #include <linux/elf.h>
6 #include <linux/mm.h>
7 #include <linux/vmalloc.h>
8 #include <linux/slab.h>
9 #include <linux/fs.h>
10 #include <linux/string.h>
11 #include <linux/kernel.h>
12 #include <linux/spinlock.h>
13
14 #ifdef CONFIG_CPU_CK810
15 #define IS_BSR32(hi16, lo16) (((hi1
16 #define IS_JSRI32(hi16, lo16) ((hi16
17
18 #define CHANGE_JSRI_TO_LRW(addr) do {
19 *(uint16_t *)(addr) = (*(uint16_t *)(a
20 *((uint16_t *)(addr) + 1) = *((uint16_
21 } while (0)
22
23 #define SET_JSR32_R26(addr) do {
24 *(uint16_t *)(addr) = 0xE8Fa;
25 *((uint16_t *)(addr) + 1) = 0x0000;
26 } while (0)
27
28 static void jsri_2_lrw_jsr(uint32_t *location)
29 {
30 uint16_t *location_tmp = (uint16_t *)l
31
32 if (IS_BSR32(*location_tmp, *(location
33 return;
34
35 if (IS_JSRI32(*location_tmp, *(locatio
36 /* jsri 0x... --> lrw r26, 0x
37 CHANGE_JSRI_TO_LRW(location);
38 /* lsli r0, r0 --> jsr r26 */
39 SET_JSR32_R26(location + 1);
40 }
41 }
42 #else
43 static inline void jsri_2_lrw_jsr(uint32_t *lo
44 {
45 return;
46 }
47 #endif
48
49 int apply_relocate_add(Elf32_Shdr *sechdrs, co
50 unsigned int symindex, unsigne
51 {
52 unsigned int i;
53 Elf32_Rela *rel = (void *) sechdr
54 Elf32_Sym *sym;
55 uint32_t *location;
56 short *temp;
57
58 for (i = 0; i < sechdrs[relsec].sh_siz
59 /* This is where to make the c
60 location = (void *)sechdrs[sec
61
62 sym = (Elf32_Sym *)sechdrs[sym
63
64
65 switch (ELF32_R_TYPE(rel[i].r_
66 case R_CSKY_32:
67 /* We add the value in
68 *location = rel[i].r_a
69 break;
70 case R_CSKY_PC32:
71 /* Add the value, subt
72 *location = rel[i].r_a
73
74 break;
75 case R_CSKY_PCRELJSR_IMM11BY2:
76 break;
77 case R_CSKY_PCRELJSR_IMM26BY2:
78 jsri_2_lrw_jsr(locatio
79 break;
80 case R_CSKY_ADDR_HI16:
81 temp = ((short *)loca
82 *temp = (short)
83 ((rel[i].r_add
84 break;
85 case R_CSKY_ADDR_LO16:
86 temp = ((short *)loca
87 *temp = (short)
88 ((rel[i].r_add
89 break;
90 default:
91 pr_err("module %s: Unk
92 me->name, ELF3
93 return -ENOEXEC;
94 }
95 }
96 return 0;
97 }
98
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