NetBSD-5.0.2/libexec/ld.aout_so/arch/powerpc/md.c
/* $NetBSD: md.c,v 1.6 2008/04/28 20:23:03 martin Exp $ */
/*-
* Copyright (c) 1998 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Paul Kranenburg.
*
* 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 NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``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 FOUNDATION OR CONTRIBUTORS
* 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.
*/
#include <sys/param.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <err.h>
#include <fcntl.h>
#include <a.out.h>
#include <stab.h>
#include <string.h>
#include "ld.h"
#ifndef RTLD
/* Pull in the ld(1) bits as well */
#include "ld_i.h"
#endif
static int reloc_target_rightshift[] = {
-1, 0, 2, 0, 0, 16, 16, 2,
-1, -1, 2, 2, -1, -1, 0, 0,
16, 16, 2, -1, -1, -1, -1, -1,
-1, -1, 0, 0, 0, 0, 16, 16
};
static int reloc_target_bitpos[] = {
-1, 0, 2, 0, 0, 0, 0, 2,
-1, -1, 2, 2, -1, -1, 0, 0,
0, 0, 2, -1, -1, -1, -1, -1,
-1, -1, 0, 0, 0, 0, 0, 0
};
static int reloc_target_size[] = {
-1, 4, 4, 2, 2, 2, 2, 4,
-1, -1, 4, 4, -1, -1, 2, 2,
2, 2, 4, -1, -1, -1, -1, -1,
-1, -1, 4, 4, 4, 2, 2, 2
};
static int reloc_target_bitsize[] = {
-1, 32, 24, 16, 16, 16, 16, 14,
-1, -1, 24, 14, -1, -1, 16, 16,
16, 16, 24, -1, -1, -1, -1, -1,
-1, -1, 32, 32, 32, 16, 16, 16
};
/*
* Get relocation addend corresponding to relocation record RP
* from address ADDR
*/
long
md_get_addend(rp, addr)
struct relocation_info *rp;
unsigned char *addr;
{
return rp->r_addend;
}
/*
* Put RELOCATION at ADDR according to relocation record RP.
*/
void
md_relocate(rp, relocation, addr, relocatable_output)
struct relocation_info *rp;
long relocation;
unsigned char *addr;
int relocatable_output;
{
register unsigned long mask;
int ha_adj = 0;
if (relocatable_output) {
/*
* Store relocation where the next link-edit run
* will look for it.
*/
rp->r_addend = relocation;
return;
}
if (rp->r_type == RELOC_16_HA
|| rp->r_type == RELOC_GOT16_HA
|| rp->r_type == RELOC_PLT16_HA)
relocation += (relocation & 0x8000) << 1;
relocation >>= RELOC_VALUE_RIGHTSHIFT(rp);
/* Unshifted mask for relocation */
mask = 1 << RELOC_TARGET_BITSIZE(rp) - 1;
mask |= mask - 1;
relocation &= mask;
/* Shift everything up to where it's going to be used */
relocation <<= RELOC_TARGET_BITPOS(rp);
mask <<= RELOC_TARGET_BITPOS(rp);
switch (RELOC_TARGET_SIZE(rp)) {
case 4:
*(u_long *)addr &= ~mask;
*(u_long *)addr |= relocation;
break;
case 2:
*(u_short *)addr &= ~mask;
*(u_short *)addr |= relocation;
break;
default:
errx(1, "Unknown relocation type %d", rp->r_type);
}
}
/*
* Set up a "direct" transfer (ie. not through the run-time binder) from
* jmpslot at OFFSET to ADDR. Used by `ld' when the SYMBOLIC flag is on,
* and by `ld.so' after resolving the symbol.
*/
void
md_fix_jmpslot(sp, offset, addr, first)
jmpslot_t *sp;
long offset;
u_long addr;
int first;
{
errx(1, "md_fix_jmpslot unimplemented");
}
void
md_set_breakpoint(where, savep)
long where;
long *savep;
{
*savep = *(long *)where;
*(char *)where = TRAP;
}
#ifndef RTLD
/*
* Machine dependent part of claim_rrs_reloc().
* Set RRS relocation type.
*/
int
md_make_reloc(rp, r, type)
struct relocation_info *rp, *r;
int type;
{
r->r_type = rp->r_type;
r->r_addend = rp->r_addend;
if (RELOC_PCREL_P(rp))
r->r_addend -= pc_relocation;
return 1;
}
/*
* Set up a transfer from jmpslot at OFFSET (relative to the PLT table)
* to the binder slot (which is at offset 0 of the PLT).
*/
void
md_make_jmpslot(sp, offset, index)
jmpslot_t *sp;
long offset;
long index;
{
errx(1, "md_make_jmpslot unimplemented");
}
/*
* Update the relocation record for a RRS jmpslot.
*/
void
md_make_jmpreloc(rp, r, type)
struct relocation_info *rp, *r;
int type;
{
errx(1, "md_make_jmpreloc unimplemented");
}
/*
* Set relocation type for a RRS GOT relocation.
*/
void
md_make_gotreloc(rp, r, type)
struct relocation_info *rp, *r;
int type;
{
errx(1, "md_make_gotreloc unimplemented");
}
/*
* Set relocation type for a RRS copy operation.
*/
void
md_make_cpyreloc(rp, r)
struct relocation_info *rp, *r;
{
errx(1, "md_make_cpyreloc unimplemented");
}
/*
* Initialize (output) exec header such that useful values are
* obtained from subsequent N_*() macro evaluations.
*/
void
md_init_header(hp, magic, flags)
struct exec *hp;
int magic, flags;
{
N_SETMAGIC((*hp), magic, MID_MACHINE, flags);
/* TEXT_START depends on the value of outheader.a_entry. */
if (!(link_mode & SHAREABLE))
hp->a_entry = PAGSIZ;
}
#endif /* RTLD */
#ifdef NEED_SWAP
/*
* Byte swap routines for cross-linking.
*/
void
md_swapin_exec_hdr(h)
struct exec *h;
{
swap_longs((long *)h + 1, sizeof(*h)/sizeof(long) - skip);
}
void
md_swapout_exec_hdr(h)
struct exec *h;
{
swap_longs((long *)h + 1, sizeof(*h)/sizeof(long) - skip);
}
void
md_swapin_reloc(r, n)
struct relocation_info *r;
int n;
{
errx(1, "md_swapin_reloc unimplemented");
}
void
md_swapout_reloc(r, n)
struct relocation_info *r;
int n;
{
errx(1, "md_swapout_reloc unimplemented");
}
void
md_swapout_jmpslot(j, n)
jmpslot_t *j;
int n;
{
errx(1, "md_swapout_jmpslot unimplemented");
}
#endif /* NEED_SWAP */