126 lines
3.8 KiB
C
126 lines
3.8 KiB
C
/* $NetBSD: mips_reloc.c,v 1.3 1999/11/07 08:01:51 mycroft Exp $ */
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/*
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* Copyright 1997 Michael L. Hitch <mhitch@montana.edu>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <stdarg.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include "debug.h"
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#include "rtld.h"
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/*
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* Relocate a MIPS GOT
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*/
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void
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_rtld_relocate_mips_got(obj)
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Obj_Entry *obj;
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{
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Elf_Addr *got = obj->pltgot;
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const Elf_Sym *sym = obj->symtab;
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const Elf_Sym *def;
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const Obj_Entry *defobj;
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int i;
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i = (got[1] & 0x80000000) ? 2 : 1;
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/* Relocate the local GOT entries */
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while (i < obj->local_gotno)
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got[i++] += (Elf_Word)obj->relocbase;
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got += obj->local_gotno;
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i = obj->symtabno - obj->gotsym;
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sym += obj->gotsym;
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/* Now do the global GOT entries */
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while (i--) {
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def = _rtld_find_symdef(_rtld_objlist, 0,
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sym->st_name + obj->strtab, obj, &defobj, true);
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if (def != NULL) {
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if (sym->st_shndx == SHN_UNDEF) {
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#if 0 /* These don't seem to work? */
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if (ELFDEFNNAME(ST_TYPE)(sym->st_info) ==
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STT_FUNC) {
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if (sym->st_value)
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*got = sym->st_value +
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(Elf_Word)obj->relocbase;
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else
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*got = def->st_value +
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(Elf_Word)defobj->relocbase;
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} else
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#endif
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*got = def->st_value +
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(Elf_Word)defobj->relocbase;
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} else if (sym->st_shndx == SHN_COMMON) {
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*got = def->st_value +
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(Elf_Word)defobj->relocbase;
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} else if (ELFDEFNNAME(ST_TYPE)(sym->st_info) ==
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STT_FUNC &&
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*got != sym->st_value) {
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*got += (Elf_Word)obj->relocbase;
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} else if (ELFDEFNNAME(ST_TYPE)(sym->st_info) ==
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STT_SECTION && ELFDEFNNAME(ST_BIND)(sym->st_info) ==
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STB_GLOBAL) {
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if (sym->st_shndx == SHN_ABS)
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*got = sym->st_value +
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(Elf_Word)obj->relocbase;
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/* else SGI stuff ignored */
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} else
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*got = def->st_value +
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(Elf_Word)defobj->relocbase;
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}
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++sym;
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++got;
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}
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}
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/*
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* _rtld_bind_mips(symbol_index, return_address, old_gp, stub_return_addr)
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*/
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caddr_t
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_rtld_bind_mips(a0, a1, a2, a3)
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Elf_Word a0;
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Elf_Addr a1, a2, a3;
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{
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Elf_Addr *u = (Elf_Addr *)(a2 - 0x7ff0);
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Obj_Entry *obj = (Obj_Entry *)(u[1] & 0x7fffffff);
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const Elf_Sym *def;
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const Obj_Entry *defobj;
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def = _rtld_find_symdef(_rtld_objlist, a0 << 8, NULL, obj, &defobj,
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true);
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if (def) {
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u[obj->local_gotno + a0 - obj->gotsym] = (Elf_Addr)
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(def->st_value + defobj->relocbase);
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return((caddr_t)(def->st_value + defobj->relocbase));
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}
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return(NULL); /* XXX */
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}
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