298 lines
6.7 KiB
C
298 lines
6.7 KiB
C
/* $NetBSD: md.c,v 1.5 1998/12/17 20:14:44 pk Exp $ */
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/*-
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* Copyright (c) 1998 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Paul Kranenburg.
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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. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/param.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/types.h>
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#include <err.h>
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#include <fcntl.h>
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#include <a.out.h>
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#include <stab.h>
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#include <string.h>
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#include "ld.h"
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#ifndef RTLD
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/* Pull in the ld(1) bits as well */
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#include "ld_i.h"
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#endif
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static int reloc_target_rightshift[] = {
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-1, 0, 2, 0, 0, 16, 16, 2,
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-1, -1, 2, 2, -1, -1, 0, 0,
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16, 16, 2, -1, -1, -1, -1, -1,
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-1, -1, 0, 0, 0, 0, 16, 16
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};
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static int reloc_target_bitpos[] = {
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-1, 0, 2, 0, 0, 0, 0, 2,
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-1, -1, 2, 2, -1, -1, 0, 0,
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0, 0, 2, -1, -1, -1, -1, -1,
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-1, -1, 0, 0, 0, 0, 0, 0
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};
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static int reloc_target_size[] = {
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-1, 4, 4, 2, 2, 2, 2, 4,
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-1, -1, 4, 4, -1, -1, 2, 2,
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2, 2, 4, -1, -1, -1, -1, -1,
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-1, -1, 4, 4, 4, 2, 2, 2
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};
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static int reloc_target_bitsize[] = {
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-1, 32, 24, 16, 16, 16, 16, 14,
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-1, -1, 24, 14, -1, -1, 16, 16,
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16, 16, 24, -1, -1, -1, -1, -1,
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-1, -1, 32, 32, 32, 16, 16, 16
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};
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/*
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* Get relocation addend corresponding to relocation record RP
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* from address ADDR
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*/
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long
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md_get_addend(rp, addr)
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struct relocation_info *rp;
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unsigned char *addr;
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{
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return rp->r_addend;
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}
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/*
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* Put RELOCATION at ADDR according to relocation record RP.
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*/
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void
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md_relocate(rp, relocation, addr, relocatable_output)
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struct relocation_info *rp;
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long relocation;
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unsigned char *addr;
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int relocatable_output;
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{
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register unsigned long mask;
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int ha_adj = 0;
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if (relocatable_output) {
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/*
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* Store relocation where the next link-edit run
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* will look for it.
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*/
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rp->r_addend = relocation;
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return;
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}
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if (rp->r_type == RELOC_16_HA
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|| rp->r_type == RELOC_GOT16_HA
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|| rp->r_type == RELOC_PLT16_HA)
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relocation += (relocation & 0x8000) << 1;
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relocation >>= RELOC_VALUE_RIGHTSHIFT(rp);
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/* Unshifted mask for relocation */
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mask = 1 << RELOC_TARGET_BITSIZE(rp) - 1;
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mask |= mask - 1;
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relocation &= mask;
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/* Shift everything up to where it's going to be used */
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relocation <<= RELOC_TARGET_BITPOS(rp);
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mask <<= RELOC_TARGET_BITPOS(rp);
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switch (RELOC_TARGET_SIZE(rp)) {
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case 4:
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*(u_long *)addr &= ~mask;
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*(u_long *)addr |= relocation;
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break;
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case 2:
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*(u_short *)addr &= ~mask;
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*(u_short *)addr |= relocation;
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break;
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default:
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errx(1, "Unknown relocation type %d", rp->r_type);
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}
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}
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/*
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* Set up a "direct" transfer (ie. not through the run-time binder) from
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* jmpslot at OFFSET to ADDR. Used by `ld' when the SYMBOLIC flag is on,
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* and by `ld.so' after resolving the symbol.
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*/
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void
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md_fix_jmpslot(sp, offset, addr, first)
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jmpslot_t *sp;
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long offset;
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u_long addr;
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int first;
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{
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errx(1, "md_fix_jmpslot unimplemented");
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}
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void
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md_set_breakpoint(where, savep)
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long where;
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long *savep;
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{
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*savep = *(long *)where;
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*(char *)where = TRAP;
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}
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#ifndef RTLD
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/*
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* Machine dependent part of claim_rrs_reloc().
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* Set RRS relocation type.
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*/
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int
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md_make_reloc(rp, r, type)
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struct relocation_info *rp, *r;
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int type;
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{
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r->r_type = rp->r_type;
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r->r_addend = rp->r_addend;
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if (RELOC_PCREL_P(rp))
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r->r_addend -= pc_relocation;
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return 1;
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}
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/*
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* Set up a transfer from jmpslot at OFFSET (relative to the PLT table)
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* to the binder slot (which is at offset 0 of the PLT).
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*/
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void
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md_make_jmpslot(sp, offset, index)
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jmpslot_t *sp;
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long offset;
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long index;
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{
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errx(1, "md_make_jmpslot unimplemented");
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}
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/*
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* Update the relocation record for a RRS jmpslot.
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*/
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void
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md_make_jmpreloc(rp, r, type)
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struct relocation_info *rp, *r;
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int type;
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{
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errx(1, "md_make_jmpreloc unimplemented");
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}
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/*
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* Set relocation type for a RRS GOT relocation.
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*/
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void
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md_make_gotreloc(rp, r, type)
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struct relocation_info *rp, *r;
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int type;
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{
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errx(1, "md_make_gotreloc unimplemented");
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}
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/*
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* Set relocation type for a RRS copy operation.
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*/
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void
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md_make_cpyreloc(rp, r)
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struct relocation_info *rp, *r;
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{
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errx(1, "md_make_cpyreloc unimplemented");
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}
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/*
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* Initialize (output) exec header such that useful values are
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* obtained from subsequent N_*() macro evaluations.
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*/
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void
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md_init_header(hp, magic, flags)
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struct exec *hp;
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int magic, flags;
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{
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N_SETMAGIC((*hp), magic, MID_MACHINE, flags);
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/* TEXT_START depends on the value of outheader.a_entry. */
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if (!(link_mode & SHAREABLE))
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hp->a_entry = PAGSIZ;
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}
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#endif /* RTLD */
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#ifdef NEED_SWAP
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/*
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* Byte swap routines for cross-linking.
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*/
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void
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md_swapin_exec_hdr(h)
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struct exec *h;
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{
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swap_longs((long *)h + 1, sizeof(*h)/sizeof(long) - skip);
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}
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void
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md_swapout_exec_hdr(h)
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struct exec *h;
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{
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swap_longs((long *)h + 1, sizeof(*h)/sizeof(long) - skip);
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}
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void
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md_swapin_reloc(r, n)
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struct relocation_info *r;
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int n;
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{
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errx(1, "md_swapin_reloc unimplemented");
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}
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void
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md_swapout_reloc(r, n)
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struct relocation_info *r;
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int n;
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{
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errx(1, "md_swapout_reloc unimplemented");
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}
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void
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md_swapout_jmpslot(j, n)
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jmpslot_t *j;
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int n;
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{
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errx(1, "md_swapout_jmpslot unimplemented");
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}
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#endif /* NEED_SWAP */
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