1 // SPDX-License-Identifier: GPL-2.0
2 #include <linux/elf.h>
3 #include <asm/kexec.h>
4
5 int arch_kexec_do_relocs(int r_type, void *loc, unsigned long val,
6 unsigned long addr)
7 {
8 switch (r_type) {
9 case R_390_NONE:
10 break;
11 case R_390_8: /* Direct 8 bit. */
12 *(u8 *)loc = val;
13 break;
14 case R_390_12: /* Direct 12 bit. */
15 *(u16 *)loc &= 0xf000;
16 *(u16 *)loc |= val & 0xfff;
17 break;
18 case R_390_16: /* Direct 16 bit. */
19 *(u16 *)loc = val;
20 break;
21 case R_390_20: /* Direct 20 bit. */
22 *(u32 *)loc &= 0xf00000ff;
23 *(u32 *)loc |= (val & 0xfff) << 16; /* DL */
24 *(u32 *)loc |= (val & 0xff000) >> 4; /* DH */
25 break;
26 case R_390_32: /* Direct 32 bit. */
27 *(u32 *)loc = val;
28 break;
29 case R_390_64: /* Direct 64 bit. */
30 case R_390_GLOB_DAT:
31 case R_390_JMP_SLOT:
32 *(u64 *)loc = val;
33 break;
34 case R_390_PC16: /* PC relative 16 bit. */
35 *(u16 *)loc = (val - addr);
36 break;
37 case R_390_PC16DBL: /* PC relative 16 bit shifted by 1. */
38 *(u16 *)loc = (val - addr) >> 1;
39 break;
40 case R_390_PC32DBL: /* PC relative 32 bit shifted by 1. */
41 *(u32 *)loc = (val - addr) >> 1;
42 break;
43 case R_390_PC32: /* PC relative 32 bit. */
44 *(u32 *)loc = (val - addr);
45 break;
46 case R_390_PC64: /* PC relative 64 bit. */
47 *(u64 *)loc = (val - addr);
48 break;
49 case R_390_RELATIVE:
50 *(unsigned long *) loc = val;
51 break;
52 default:
53 return 1;
54 }
55 return 0;
56 }
57
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.