1 /* $OpenBSD: archdep.h,v 1.5 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_PPC64 /* ELF e_machine ID value checked */
34
35
36 #ifdef RCRT0
37
38 /* currently only used by RELOC_DYN() below */
39 static inline void
_dl_dcbf(Elf_Addr * addr)40 _dl_dcbf(Elf_Addr *addr)
41 {
42 __asm__ volatile ("dcbst %%r0, %0\n\t"
43 "sync\n\t"
44 "icbi %%r0, %0\n\t"
45 "sync\n\t"
46 "isync"
47 : : "r" (addr) : "0");
48 }
49
50 /* Only used in lib/csu/boot.h */
51 static inline void
RELOC_DYN(const Elf_RelA * r,const Elf_Sym * s,Elf_Addr * p,unsigned long v)52 RELOC_DYN(const Elf_RelA *r, const Elf_Sym *s, Elf_Addr *p, unsigned long v)
53 {
54 if (ELF_R_TYPE(r->r_info) == R_PPC64_RELATIVE) {
55 *p = v + r->r_addend;
56 } else if (ELF_R_TYPE(r->r_info) == R_PPC64_JMP_SLOT) {
57 Elf_Addr val = v + s->st_value + r->r_addend -
58 (Elf_Addr)(p);
59 if (((val & 0xfe000000) != 0) &&
60 ((val & 0xfe000000) != 0xfe000000)) {
61 /* invalid offset */
62 _csu_abort();
63 }
64 val &= ~0xfc000000;
65 val |= 0x48000000;
66 *p = val;
67 _dl_dcbf(p);
68 } else if (ELF_R_TYPE((r)->r_info) == R_PPC64_GLOB_DAT) {
69 *p = v + s->st_value + r->r_addend;
70 } else {
71 _csu_abort();
72 }
73 }
74
75 #endif /* RCRT0 */
76 #endif /* _POWERPC_ARCHDEP_H_ */
77