// SPDX-License-Identifier: GPL-2.0 #include <linux/elf.h> #include <asm/kexec.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; }