1 /* $OpenBSD: archdep.h,v 1.20 2017/01/20 10:40:30 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 34 #define MACHID EM_PPC /* ELF e_machine ID value checked */ 35 36 #include <elf_abi.h> 37 #include <machine/reloc.h> 38 #include "syscall.h" 39 #include "util.h" 40 41 /* 42 * The following functions are declared inline so they can 43 * be used before bootstrap linking has been finished. 44 */ 45 46 static inline void 47 _dl_dcbf(Elf32_Addr *addr) 48 { 49 __asm__ volatile ("dcbst 0, %0\n\t" 50 "sync\n\t" 51 "icbi 0, %0\n\t" 52 "sync\n\t" 53 "isync" 54 : : "r" (addr) : "0"); 55 } 56 57 static inline void 58 RELOC_DYN(Elf32_Rela *r, const Elf32_Sym *s, Elf32_Addr *p, unsigned long v) 59 { 60 if (ELF32_R_TYPE(r->r_info) == RELOC_RELATIVE) { 61 *p = v + r->r_addend; 62 } else if (ELF32_R_TYPE(r->r_info) == RELOC_JMP_SLOT) { 63 Elf32_Addr val = v + s->st_value + r->r_addend - 64 (Elf32_Addr)(p); 65 if (((val & 0xfe000000) != 0) && 66 ((val & 0xfe000000) != 0xfe000000)) { 67 /* invalid offset */ 68 _dl_exit(20); 69 } 70 val &= ~0xfc000000; 71 val |= 0x48000000; 72 *p = val; 73 _dl_dcbf(p); 74 } else if (ELF32_R_TYPE((r)->r_info) == RELOC_GLOB_DAT) { 75 *p = v + s->st_value + r->r_addend; 76 } else { 77 /* XXX - printf might not work here, but we give it a shot. */ 78 _dl_printf("Unknown bootstrap relocation.\n"); 79 _dl_exit(6); 80 } 81 } 82 83 #define RELOC_GOT(obj, offs) 84 85 #endif /* _POWERPC_ARCHDEP_H_ */ 86