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
_dl_dcbf(void * addr)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
RELOC_DYN(const Elf_RelA * r,const Elf_Sym * s,Elf_Addr * p,unsigned long v)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