| b.liu | e958203 | 2025-04-17 19:18:16 +0800 | [diff] [blame^] | 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 | } |