1/*	$OpenBSD: archdep.h,v 1.18 2023/11/18 16:26:17 deraadt Exp $ */
2
3/*
4 * Copyright (c) 1998-2002 Opsycon AB, Sweden.
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 _MIPS_ARCHDEP_H_
30#define _MIPS_ARCHDEP_H_
31
32#define	RELOC_TAG	DT_REL
33#define	MACHID		EM_MIPS		/* ELF e_machine ID value checked */
34
35/* Only used in lib/csu/mips64/boot_md.h */
36#ifdef RCRT0
37
38#include "util.h"		/* for _dl_memset */
39
40#define RELOC_DYN(relp, symp, adrp, val)				\
41do {									\
42	if (ELF_R_TYPE(relp->r_info) == R_MIPS_REL32_64) {		\
43		if (ELF_R_SYM(relp->r_info) != 0)			\
44			*adrp += symp->st_value + val;			\
45		else							\
46			*adrp += val;					\
47	} else if (ELF_R_TYPE(relp->r_info) != R_MIPS_NONE) {		\
48		_csu_abort();						\
49	}								\
50} while (0)
51
52#define RELOC_GOT(obj, off)						\
53do {									\
54	struct boot_dyn *__dynld = obj;					\
55	long __loff = off;						\
56	Elf_Addr *gotp;							\
57	int i, n;							\
58	const Elf_Sym *sp;						\
59									\
60	/* Do all local gots */						\
61	gotp = __dynld->dt_pltgot;					\
62	n = __dynld->dt_proc[DT_MIPS_LOCAL_GOTNO - DT_LOPROC];		\
63									\
64	for (i = 2; i < n; i++) {					\
65		gotp[i] += __loff;					\
66	}								\
67	gotp += n;							\
68									\
69	/* Do symbol referencing gots. There should be no global... */	\
70	n =  __dynld->dt_proc[DT_MIPS_SYMTABNO - DT_LOPROC] -		\
71	  __dynld->dt_proc[DT_MIPS_GOTSYM - DT_LOPROC];			\
72	sp = __dynld->dt_symtab;					\
73	sp += __dynld->dt_proc[DT_MIPS_GOTSYM - DT_LOPROC];		\
74									\
75	while (n--) {							\
76		if (sp->st_shndx == SHN_UNDEF ||			\
77		    sp->st_shndx == SHN_COMMON) {			\
78			if (ELF_ST_BIND(sp->st_info) != STB_WEAK)	\
79				_csu_abort();				\
80		} else if (ELF_ST_TYPE(sp->st_info) == STT_FUNC) {	\
81			*gotp += __loff;				\
82		} else {						\
83			*gotp = sp->st_value + __loff;			\
84		}							\
85		gotp++;							\
86		sp++;							\
87	}								\
88} while (0)
89
90#endif /* RCRT0 */
91#endif /* _MIPS_ARCHDEP_H_ */
92