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805bc0bc GS |
1 | // SPDX-License-Identifier: GPL-2.0 |
2 | #include <linux/elf.h> | |
1877011a | 3 | #include <asm/kexec.h> |
805bc0bc GS |
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. */ | |
ac49303d | 30 | case R_390_GLOB_DAT: |
805bc0bc GS |
31 | *(u64 *)loc = val; |
32 | break; | |
33 | case R_390_PC16: /* PC relative 16 bit. */ | |
34 | *(u16 *)loc = (val - addr); | |
35 | break; | |
36 | case R_390_PC16DBL: /* PC relative 16 bit shifted by 1. */ | |
37 | *(u16 *)loc = (val - addr) >> 1; | |
38 | break; | |
39 | case R_390_PC32DBL: /* PC relative 32 bit shifted by 1. */ | |
40 | *(u32 *)loc = (val - addr) >> 1; | |
41 | break; | |
42 | case R_390_PC32: /* PC relative 32 bit. */ | |
43 | *(u32 *)loc = (val - addr); | |
44 | break; | |
45 | case R_390_PC64: /* PC relative 64 bit. */ | |
46 | *(u64 *)loc = (val - addr); | |
47 | break; | |
48 | case R_390_RELATIVE: | |
49 | *(unsigned long *) loc = val; | |
50 | break; | |
51 | default: | |
52 | return 1; | |
53 | } | |
54 | return 0; | |
55 | } |