1 // SPDX-License-Identifier: GPL-2.0 2 #include <linux/elf.h> 3 #include <asm/kexec.h> 4 arch_kexec_do_relocs(int r_type,void * loc,unsigned long val,unsigned long addr)5int 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