1 /* $OpenBSD: archdep.h,v 1.3 2021/11/14 22:07:39 guenther 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 #include <elf.h> 36 #include <machine/reloc.h> 37 #include "syscall.h" 38 #include "util.h" 39 40 41 static inline void 42 _dl_dcbf(Elf_Addr *addr) 43 { 44 __asm__ volatile ("dcbst %%r0, %0\n\t" 45 "sync\n\t" 46 "icbi %%r0, %0\n\t" 47 "sync\n\t" 48 "isync" 49 : : "r" (addr) : "0"); 50 } 51 52 /* Only used in lib/csu/boot.h */ 53 static inline void 54 RELOC_DYN(Elf_RelA *r, const Elf_Sym *s, Elf_Addr *p, unsigned long v) 55 { 56 if (ELF_R_TYPE(r->r_info) == R_PPC64_RELATIVE) { 57 *p = v + r->r_addend; 58 } else if (ELF_R_TYPE(r->r_info) == R_PPC64_JMP_SLOT) { 59 Elf_Addr val = v + s->st_value + r->r_addend - 60 (Elf_Addr)(p); 61 if (((val & 0xfe000000) != 0) && 62 ((val & 0xfe000000) != 0xfe000000)) { 63 /* invalid offset */ 64 _dl_exit(20); 65 } 66 val &= ~0xfc000000; 67 val |= 0x48000000; 68 *p = val; 69 _dl_dcbf(p); 70 } else if (ELF_R_TYPE((r)->r_info) == R_PPC64_GLOB_DAT) { 71 *p = v + s->st_value + r->r_addend; 72 } else { 73 _dl_exit(6); 74 } 75 } 76 77 #endif /* _POWERPC_ARCHDEP_H_ */ 78