1 /* $OpenBSD: archdep.h,v 1.26 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_PPC /* ELF e_machine ID value checked */ 34 35 36 static inline void 37 _dl_dcbf(void *addr) 38 { 39 __asm__ volatile ("dcbst 0, %0\n\t" 40 "sync\n\t" 41 "icbi 0, %0\n\t" 42 "sync\n\t" 43 "isync" 44 : : "r" (addr) : "0"); 45 } 46 47 /* Only used in lib/csu/boot.h */ 48 #ifdef RCRT0 49 50 static inline void 51 RELOC_DYN(const Elf_RelA *r, const Elf_Sym *s, Elf_Addr *p, unsigned long v) 52 { 53 if (ELF_R_TYPE(r->r_info) == RELOC_RELATIVE) { 54 *p = v + r->r_addend; 55 } else if (ELF_R_TYPE(r->r_info) == RELOC_JMP_SLOT) { 56 Elf_Addr val = v + s->st_value + r->r_addend - 57 (Elf_Addr)(p); 58 if (((val & 0xfe000000) != 0) && 59 ((val & 0xfe000000) != 0xfe000000)) { 60 /* invalid offset */ 61 _csu_abort(); 62 } 63 val &= ~0xfc000000; 64 val |= 0x48000000; 65 *p = val; 66 _dl_dcbf(p); 67 } else if (ELF_R_TYPE((r)->r_info) == RELOC_GLOB_DAT) { 68 *p = v + s->st_value + r->r_addend; 69 } else { 70 _csu_abort(); 71 } 72 } 73 74 #endif /* RCRT0 */ 75 #endif /* _POWERPC_ARCHDEP_H_ */ 76