1 /* $OpenBSD: archdep.h,v 1.14 2010/01/02 12:16:35 kettenis 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 DL_MALLOC_ALIGN 4 /* Arch constraint or otherwise */ 33 34 #define MACHID EM_PPC /* ELF e_machine ID value checked */ 35 36 #define RELTYPE Elf32_Rela 37 #define RELSIZE sizeof(Elf32_Rela) 38 39 #include <elf_abi.h> 40 #include <machine/reloc.h> 41 #include "syscall.h" 42 #include "util.h" 43 44 #define RTLD_PROTECT_PLT 45 46 /* HACK */ 47 #define DT_PROCNUM 0 48 #ifndef DT_BIND_NOW 49 #define DT_BIND_NOW 0 50 #endif 51 52 /* 53 * The following functions are declared inline so they can 54 * be used before bootstrap linking has been finished. 55 */ 56 57 static inline void 58 _dl_dcbf(Elf32_Addr *addr) 59 { 60 __asm__ volatile ("dcbst 0, %0\n\t" 61 "sync\n\t" 62 "icbi 0, %0\n\t" 63 "sync\n\t" 64 "isync" 65 : : "r" (addr) : "0"); 66 } 67 68 static inline void 69 RELOC_REL(Elf_Rel *r, const Elf_Sym *s, Elf_Addr *p, unsigned long v) 70 { 71 /* PowerPC does not use REL type relocations */ 72 _dl_exit(20); 73 } 74 75 static inline void 76 RELOC_RELA(Elf32_Rela *r, const Elf32_Sym *s, Elf32_Addr *p, unsigned long v, 77 Elf_Addr *pltgot) 78 { 79 if (ELF32_R_TYPE(r->r_info) == RELOC_RELATIVE) { 80 *p = v + r->r_addend; 81 } else if (ELF32_R_TYPE(r->r_info) == RELOC_JMP_SLOT) { 82 Elf32_Addr val = v + s->st_value + r->r_addend - 83 (Elf32_Addr)(p); 84 if (((val & 0xfe000000) != 0) && 85 ((val & 0xfe000000) != 0xfe000000)) { 86 /* invalid offset */ 87 _dl_exit(20); 88 } 89 val &= ~0xfc000000; 90 val |= 0x48000000; 91 *p = val; 92 _dl_dcbf(p); 93 } else if (ELF32_R_TYPE((r)->r_info) == RELOC_GLOB_DAT) { 94 *p = v + s->st_value + r->r_addend; 95 } else { 96 /* XXX - printf might not work here, but we give it a shot. */ 97 _dl_printf("Unknown bootstrap relocation.\n"); 98 _dl_exit(6); 99 } 100 } 101 102 #define RELOC_GOT(obj, offs) 103 104 #define GOT_PERMS (PROT_READ|PROT_EXEC) 105 106 #endif /* _POWERPC_ARCHDEP_H_ */ 107