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 | |