diff options
Diffstat (limited to 'libexec/rtld-aout/i386/md.c')
| -rw-r--r-- | libexec/rtld-aout/i386/md.c | 384 |
1 files changed, 0 insertions, 384 deletions
diff --git a/libexec/rtld-aout/i386/md.c b/libexec/rtld-aout/i386/md.c deleted file mode 100644 index 63b9d17..0000000 --- a/libexec/rtld-aout/i386/md.c +++ /dev/null @@ -1,384 +0,0 @@ -/* - * Copyright (c) 1993 Paul Kranenburg - * All rights reserved. - * - * 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. - * 3. All advertising materials mentioning features or use of this software - * must display the following acknowledgement: - * This product includes software developed by Paul Kranenburg. - * 4. The name of the author may not be used to endorse or promote products - * derived from this software without specific prior written permission - * - * 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. - * - * $FreeBSD$ - */ - -#include <sys/param.h> -#include <stddef.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 "dynamic.h" - -#if defined(RTLD) && defined(SUN_COMPAT) -#define REL_SIZE(r) (2) /* !!!!! Sun BUG compatible */ -#else -#define REL_SIZE(r) ((r)->r_length) -#endif - -/* - * Get relocation addend corresponding to relocation record RP - * from address ADDR - */ -long -md_get_addend(rp, addr) -struct relocation_info *rp; -unsigned char *addr; -{ - switch (REL_SIZE(rp)) { - case 0: - return get_byte(addr); - case 1: - return get_short(addr); - case 2: - return get_long(addr); - default: - errx(1, "Unsupported relocation size: %x", - REL_SIZE(rp)); - } -} - -/* - * 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; -{ - switch (REL_SIZE(rp)) { - case 0: - put_byte(addr, relocation); - break; - case 1: - put_short(addr, relocation); - break; - case 2: - put_long(addr, relocation); - break; - default: - errx(1, "Unsupported relocation size: %x", - REL_SIZE(rp)); - } -} - -/* - * 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; -{ - /* Relocation size */ - r->r_length = rp->r_length; - - if (rp->r_pcrel) - r->r_pcrel = 1; - - if (type & RELTYPE_RELATIVE) - r->r_relative = 1; - - if (type & RELTYPE_COPY) - r->r_copy = 1; - - return 0; -} - -/* - * 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; -{ - /* - * i386 PC-relative "fixed point" is located right after the - * instruction it pertains to. - */ - u_long fudge = - (sizeof(sp->opcode) + sizeof(sp->addr) + offset); - - sp->opcode = CALL; -#if 0 - sp->addr = fudge; -#else - sp->addr[0] = fudge & 0xffff; - sp->addr[1] = fudge >> 16; -#endif - sp->reloc_index = index; -} - -/* - * 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. - * On the i386, we use the JMP instruction which is PC relative, so no - * further RRS relocations will be necessary for such a jmpslot. - */ -void -md_fix_jmpslot(sp, offset, addr) -jmpslot_t *sp; -long offset; -u_long addr; -{ - u_long fudge = addr - (sizeof(sp->opcode) + sizeof(sp->addr) + offset); - - sp->opcode = JUMP; -#if 0 - sp->addr = fudge; -#else - sp->addr[0] = fudge & 0xffff; - sp->addr[1] = fudge >> 16; -#endif - sp->reloc_index = 0; -} - -/* - * Bind a jmpslot to its target address. TARGET is where the jmpslot - * should jump to, and WHERE is a pointer to the jmpslot's address field. - * This is called by the dynamic linker when LD_BIND_NOW is set in the - * environment. - */ -void -md_bind_jmpslot(target, where) -u_long target; -caddr_t where; -{ - jmpslot_t *sp = - (jmpslot_t *) (where - offsetof(jmpslot_t, addr[0])); - - md_fix_jmpslot(sp, (long) sp, target); -} - -/* - * Update the relocation record for a RRS jmpslot. - */ -void -md_make_jmpreloc(rp, r, type) -struct relocation_info *rp, *r; -int type; -{ - jmpslot_t *sp; - - /* - * Fix relocation address to point to the correct - * location within this jmpslot. - */ - r->r_address += sizeof(sp->opcode); - - /* Relocation size */ - r->r_length = 2; - - /* Set relocation type */ - r->r_jmptable = 1; - if (type & RELTYPE_RELATIVE) - r->r_relative = 1; - -} - -/* - * Set relocation type for a RRS GOT relocation. - */ -void -md_make_gotreloc(rp, r, type) -struct relocation_info *rp, *r; -int type; -{ - r->r_baserel = 1; - if (type & RELTYPE_RELATIVE) - r->r_relative = 1; - - /* Relocation size */ - r->r_length = 2; -} - -/* - * Set relocation type for a RRS copy operation. - */ -void -md_make_cpyreloc(rp, r) -struct relocation_info *rp, *r; -{ - /* Relocation size */ - r->r_length = 2; - - r->r_copy = 1; -} - -void -md_set_breakpoint(where, savep) -long where; -long *savep; -{ - *savep = *(long *)where; - *(char *)where = TRAP; -} - -#ifndef RTLD - -#ifdef __FreeBSD__ -int netzmagic; -#endif - -/* - * 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; -{ -#ifdef NetBSD - if (oldmagic || magic == QMAGIC) - hp->a_midmag = magic; - else - N_SETMAGIC((*hp), magic, MID_I386, flags); -#endif -#ifdef __FreeBSD__ - if (oldmagic) - hp->a_midmag = magic; - else if (netzmagic) - N_SETMAGIC_NET((*hp), magic, MID_I386, flags); - else - N_SETMAGIC((*hp), magic, MID_I386, flags); -#endif - - /* 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; -{ - int skip = 0; - - if (!N_BADMAG(*h)) - skip = 1; - - swap_longs((long *)h + skip, sizeof(*h)/sizeof(long) - skip); -} - -void -md_swapout_exec_hdr(h) -struct exec *h; -{ - /* NetBSD: Always leave magic alone */ - int skip = 1; -#if 0 - if (N_GETMAGIC(*h) == OMAGIC) - skip = 0; -#endif - - swap_longs((long *)h + skip, sizeof(*h)/sizeof(long) - skip); -} - - -void -md_swapin_reloc(r, n) -struct relocation_info *r; -int n; -{ - int bits; - - for (; n; n--, r++) { - r->r_address = md_swap_long(r->r_address); - bits = ((int *)r)[1]; - r->r_symbolnum = md_swap_long(bits) & 0x00ffffff; - r->r_pcrel = (bits & 1); - r->r_length = (bits >> 1) & 3; - r->r_extern = (bits >> 3) & 1; - r->r_baserel = (bits >> 4) & 1; - r->r_jmptable = (bits >> 5) & 1; - r->r_relative = (bits >> 6) & 1; -#ifdef N_SIZE - r->r_copy = (bits >> 7) & 1; -#endif - } -} - -void -md_swapout_reloc(r, n) -struct relocation_info *r; -int n; -{ - int bits; - - for (; n; n--, r++) { - r->r_address = md_swap_long(r->r_address); - bits = md_swap_long(r->r_symbolnum) & 0xffffff00; - bits |= (r->r_pcrel & 1); - bits |= (r->r_length & 3) << 1; - bits |= (r->r_extern & 1) << 3; - bits |= (r->r_baserel & 1) << 4; - bits |= (r->r_jmptable & 1) << 5; - bits |= (r->r_relative & 1) << 6; -#ifdef N_SIZE - bits |= (r->r_copy & 1) << 7; -#endif - ((int *)r)[1] = bits; - } -} - -void -md_swapout_jmpslot(j, n) -jmpslot_t *j; -int n; -{ - for (; n; n--, j++) { - j->opcode = md_swap_short(j->opcode); - j->addr[0] = md_swap_short(j->addr[0]); - j->addr[1] = md_swap_short(j->addr[1]); - j->reloc_index = md_swap_short(j->reloc_index); - } -} - -#endif /* NEED_SWAP */ |
