| // SPDX-License-Identifier: GPL-2.0 |
| #include <linux/elf.h> |
| |
| int arch_kexec_do_relocs(int r_type, void *loc, unsigned long val, |
| unsigned long addr) |
| { |
| switch (r_type) { |
| case R_390_NONE: |
| break; |
| case R_390_8: /* Direct 8 bit. */ |
| *(u8 *)loc = val; |
| break; |
| case R_390_12: /* Direct 12 bit. */ |
| *(u16 *)loc &= 0xf000; |
| *(u16 *)loc |= val & 0xfff; |
| break; |
| case R_390_16: /* Direct 16 bit. */ |
| *(u16 *)loc = val; |
| break; |
| case R_390_20: /* Direct 20 bit. */ |
| *(u32 *)loc &= 0xf00000ff; |
| *(u32 *)loc |= (val & 0xfff) << 16; /* DL */ |
| *(u32 *)loc |= (val & 0xff000) >> 4; /* DH */ |
| break; |
| case R_390_32: /* Direct 32 bit. */ |
| *(u32 *)loc = val; |
| break; |
| case R_390_64: /* Direct 64 bit. */ |
| *(u64 *)loc = val; |
| break; |
| case R_390_PC16: /* PC relative 16 bit. */ |
| *(u16 *)loc = (val - addr); |
| break; |
| case R_390_PC16DBL: /* PC relative 16 bit shifted by 1. */ |
| *(u16 *)loc = (val - addr) >> 1; |
| break; |
| case R_390_PC32DBL: /* PC relative 32 bit shifted by 1. */ |
| *(u32 *)loc = (val - addr) >> 1; |
| break; |
| case R_390_PC32: /* PC relative 32 bit. */ |
| *(u32 *)loc = (val - addr); |
| break; |
| case R_390_PC64: /* PC relative 64 bit. */ |
| *(u64 *)loc = (val - addr); |
| break; |
| case R_390_RELATIVE: |
| *(unsigned long *) loc = val; |
| break; |
| default: |
| return 1; |
| } |
| return 0; |
| } |
