cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

machine_kexec_reloc.c (1375B)

      1// SPDX-License-Identifier: GPL-2.0
      2#include <linux/elf.h>
      3#include <asm/kexec.h>
      4
      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}