1/* $OpenBSD: archdep.h,v 1.5 2023/11/18 16:26:17 deraadt Exp $ */ 2 3/* 4 * Copyright (c) 1998 Per Fogelstrom, Opsycon AB 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS 16 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 17 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY 19 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 * 27 */ 28 29#ifndef _POWERPC_ARCHDEP_H_ 30#define _POWERPC_ARCHDEP_H_ 31 32#define RELOC_TAG DT_RELA 33#define MACHID EM_PPC64 /* ELF e_machine ID value checked */ 34 35 36#ifdef RCRT0 37 38/* currently only used by RELOC_DYN() below */ 39static inline void 40_dl_dcbf(Elf_Addr *addr) 41{ 42 __asm__ volatile ("dcbst %%r0, %0\n\t" 43 "sync\n\t" 44 "icbi %%r0, %0\n\t" 45 "sync\n\t" 46 "isync" 47 : : "r" (addr) : "0"); 48} 49 50/* Only used in lib/csu/boot.h */ 51static inline void 52RELOC_DYN(const Elf_RelA *r, const Elf_Sym *s, Elf_Addr *p, unsigned long v) 53{ 54 if (ELF_R_TYPE(r->r_info) == R_PPC64_RELATIVE) { 55 *p = v + r->r_addend; 56 } else if (ELF_R_TYPE(r->r_info) == R_PPC64_JMP_SLOT) { 57 Elf_Addr val = v + s->st_value + r->r_addend - 58 (Elf_Addr)(p); 59 if (((val & 0xfe000000) != 0) && 60 ((val & 0xfe000000) != 0xfe000000)) { 61 /* invalid offset */ 62 _csu_abort(); 63 } 64 val &= ~0xfc000000; 65 val |= 0x48000000; 66 *p = val; 67 _dl_dcbf(p); 68 } else if (ELF_R_TYPE((r)->r_info) == R_PPC64_GLOB_DAT) { 69 *p = v + s->st_value + r->r_addend; 70 } else { 71 _csu_abort(); 72 } 73} 74 75#endif /* RCRT0 */ 76#endif /* _POWERPC_ARCHDEP_H_ */ 77