/*      $OpenBSD: archdep.h,v 1.18 2023/11/18 16:26:17 deraadt Exp $ */

/*
 * Copyright (c) 1998-2002 Opsycon AB, Sweden.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 */

#ifndef _MIPS_ARCHDEP_H_
#define _MIPS_ARCHDEP_H_

#define RELOC_TAG       DT_REL
#define MACHID          EM_MIPS         /* ELF e_machine ID value checked */

/* Only used in lib/csu/mips64/boot_md.h */
#ifdef RCRT0

#include "util.h"               /* for _dl_memset */

#define RELOC_DYN(relp, symp, adrp, val)                                \
do {                                                                    \
        if (ELF_R_TYPE(relp->r_info) == R_MIPS_REL32_64) {              \
                if (ELF_R_SYM(relp->r_info) != 0)                       \
                        *adrp += symp->st_value + val;                  \
                else                                                    \
                        *adrp += val;                                   \
        } else if (ELF_R_TYPE(relp->r_info) != R_MIPS_NONE) {           \
                _csu_abort();                                           \
        }                                                               \
} while (0)

#define RELOC_GOT(obj, off)                                             \
do {                                                                    \
        struct boot_dyn *__dynld = obj;                                 \
        long __loff = off;                                              \
        Elf_Addr *gotp;                                                 \
        int i, n;                                                       \
        const Elf_Sym *sp;                                              \
                                                                        \
        /* Do all local gots */                                         \
        gotp = __dynld->dt_pltgot;                                      \
        n = __dynld->dt_proc[DT_MIPS_LOCAL_GOTNO - DT_LOPROC];          \
                                                                        \
        for (i = 2; i < n; i++) {                                       \
                gotp[i] += __loff;                                      \
        }                                                               \
        gotp += n;                                                      \
                                                                        \
        /* Do symbol referencing gots. There should be no global... */  \
        n =  __dynld->dt_proc[DT_MIPS_SYMTABNO - DT_LOPROC] -           \
          __dynld->dt_proc[DT_MIPS_GOTSYM - DT_LOPROC];                 \
        sp = __dynld->dt_symtab;                                        \
        sp += __dynld->dt_proc[DT_MIPS_GOTSYM - DT_LOPROC];             \
                                                                        \
        while (n--) {                                                   \
                if (sp->st_shndx == SHN_UNDEF ||                        \
                    sp->st_shndx == SHN_COMMON) {                       \
                        if (ELF_ST_BIND(sp->st_info) != STB_WEAK)       \
                                _csu_abort();                           \
                } else if (ELF_ST_TYPE(sp->st_info) == STT_FUNC) {      \
                        *gotp += __loff;                                \
                } else {                                                \
                        *gotp = sp->st_value + __loff;                  \
                }                                                       \
                gotp++;                                                 \
                sp++;                                                   \
        }                                                               \
} while (0)

#endif /* RCRT0 */
#endif /* _MIPS_ARCHDEP_H_ */