rtld: remove mips arch directory
Reviewed by: imp Sponsored by: The FreeBSD Foundation Differential revision: https://reviews.freebsd.org/D33763
This commit is contained in:
Konstantin Belousov
parent
292cba9b49
commit
470b98e61d
@ -1,3 +0,0 @@
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# $FreeBSD$
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CFLAGS.reloc.c+=-fno-jump-tables
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@ -1,786 +0,0 @@
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/* $NetBSD: mips_reloc.c,v 1.58 2010/01/14 11:57:06 skrll Exp $ */
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/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright 1997 Michael L. Hitch <mhitch@montana.edu>
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* Portions copyright 2002 Charles M. Hannum <root@ihack.net>
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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 <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <sys/endian.h>
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#include <stdlib.h>
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#include <string.h>
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#include <inttypes.h>
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#include <machine/sysarch.h>
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#include <machine/tls.h>
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#include "debug.h"
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#include "rtld.h"
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#ifdef __mips_n64
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#define GOT1_MASK 0x8000000000000000UL
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#else
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#define GOT1_MASK 0x80000000UL
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#endif
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/*
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* Determine if the second GOT entry is reserved for rtld or if it is
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* the first "real" GOT entry.
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*
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* This must be a macro rather than a function so that
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* _rtld_relocate_nonplt_self doesn't trigger a GOT invocation trying
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* to use it before the local GOT entries in rtld are adjusted.
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*/
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#ifdef __mips_n64
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/* Old binutils uses the 32-bit GOT1 mask value for N64. */
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#define GOT1_RESERVED_FOR_RTLD(got) \
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(((got)[1] == 0x80000000) || (got)[1] & GOT1_MASK)
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#else
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#define GOT1_RESERVED_FOR_RTLD(got) ((got)[1] & GOT1_MASK)
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#endif
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#ifdef __mips_n64
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/*
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* ELF64 MIPS encodes the relocs uniquely. The first 32-bits of info contain
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* the symbol index. The top 32-bits contain three relocation types encoded
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* in big-endian integer with first relocation in LSB. This means for little
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* endian we have to byte swap that integer (r_type).
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*/
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#define Elf_Sxword Elf64_Sxword
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#define ELF_R_NXTTYPE_64_P(r_type) ((((r_type) >> 8) & 0xff) == R_TYPE(64))
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#if BYTE_ORDER == LITTLE_ENDIAN
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#undef ELF_R_SYM
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#undef ELF_R_TYPE
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#define ELF_R_SYM(r_info) ((r_info) & 0xffffffff)
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#define ELF_R_TYPE(r_info) bswap32((r_info) >> 32)
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#endif
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#else
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#define ELF_R_NXTTYPE_64_P(r_type) (0)
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#define Elf_Sxword Elf32_Sword
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#endif
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void _rtld_pltbind_start(void);
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void
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init_pltgot(Obj_Entry *obj)
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{
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if (obj->pltgot != NULL) {
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obj->pltgot[0] = (Elf_Addr) &_rtld_bind_start;
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if (GOT1_RESERVED_FOR_RTLD(obj->pltgot))
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obj->pltgot[1] = (Elf_Addr) obj | GOT1_MASK;
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}
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if (obj->mips_pltgot != NULL) {
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obj->mips_pltgot[0] = (Elf_Addr) &_rtld_pltbind_start;
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obj->mips_pltgot[1] = (Elf_Addr) obj;
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}
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}
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int
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do_copy_relocations(Obj_Entry *dstobj)
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{
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const Obj_Entry *srcobj, *defobj;
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const Elf_Rel *rellim;
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const Elf_Rel *rel;
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const Elf_Sym *srcsym;
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const Elf_Sym *dstsym;
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const void *srcaddr;
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const char *name;
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void *dstaddr;
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SymLook req;
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size_t size;
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int res;
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/*
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* COPY relocs are invalid outside of the main program
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*/
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assert(dstobj->mainprog);
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rellim = (const Elf_Rel *)((const char *)dstobj->rel + dstobj->relsize);
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for (rel = dstobj->rel; rel < rellim; rel++) {
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if (ELF_R_TYPE(rel->r_info) != R_MIPS_COPY)
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continue;
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dstaddr = (void *)(dstobj->relocbase + rel->r_offset);
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dstsym = dstobj->symtab + ELF_R_SYM(rel->r_info);
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name = dstobj->strtab + dstsym->st_name;
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size = dstsym->st_size;
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symlook_init(&req, name);
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req.ventry = fetch_ventry(dstobj, ELF_R_SYM(rel->r_info));
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req.flags = SYMLOOK_EARLY;
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for (srcobj = globallist_next(dstobj); srcobj != NULL;
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srcobj = globallist_next(srcobj)) {
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res = symlook_obj(&req, srcobj);
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if (res == 0) {
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srcsym = req.sym_out;
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defobj = req.defobj_out;
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break;
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}
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}
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if (srcobj == NULL) {
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_rtld_error(
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"Undefined symbol \"%s\" referenced from COPY relocation in %s",
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name, dstobj->path);
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return (-1);
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}
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srcaddr = (const void *)(defobj->relocbase + srcsym->st_value);
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memcpy(dstaddr, srcaddr, size);
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}
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return (0);
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}
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void _rtld_relocate_nonplt_self(Elf_Dyn *, Elf_Addr);
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/*
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* It is possible for the compiler to emit relocations for unaligned data.
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* We handle this situation with these inlines.
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*/
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static __inline Elf_Sxword
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load_ptr(void *where, size_t len)
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{
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Elf_Sxword val;
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if (__predict_true(((uintptr_t)where & (len - 1)) == 0)) {
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#ifdef __mips_n64
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if (len == sizeof(Elf_Sxword))
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return *(Elf_Sxword *)where;
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#endif
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return *(Elf_Sword *)where;
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}
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val = 0;
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#if BYTE_ORDER == LITTLE_ENDIAN
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(void)memcpy(&val, where, len);
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#endif
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#if BYTE_ORDER == BIG_ENDIAN
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(void)memcpy((uint8_t *)((&val)+1) - len, where, len);
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#endif
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return (len == sizeof(Elf_Sxword)) ? val : (Elf_Sword)val;
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}
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static __inline void
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store_ptr(void *where, Elf_Sxword val, size_t len)
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{
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if (__predict_true(((uintptr_t)where & (len - 1)) == 0)) {
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#ifdef __mips_n64
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if (len == sizeof(Elf_Sxword)) {
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*(Elf_Sxword *)where = val;
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return;
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}
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#endif
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*(Elf_Sword *)where = val;
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return;
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}
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#if BYTE_ORDER == LITTLE_ENDIAN
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(void)memcpy(where, &val, len);
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#endif
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#if BYTE_ORDER == BIG_ENDIAN
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(void)memcpy(where, (const uint8_t *)((&val)+1) - len, len);
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#endif
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}
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void
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_rtld_relocate_nonplt_self(Elf_Dyn *dynp, Elf_Addr relocbase)
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{
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const Elf_Rel *rel = NULL, *rellim;
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Elf_Addr relsz = 0;
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const Elf_Sym *symtab = NULL, *sym;
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Elf_Addr *where;
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Elf_Addr *got = NULL;
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Elf_Word local_gotno = 0, symtabno = 0, gotsym = 0;
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size_t i;
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for (; dynp->d_tag != DT_NULL; dynp++) {
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switch (dynp->d_tag) {
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case DT_REL:
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rel = (const Elf_Rel *)(relocbase + dynp->d_un.d_ptr);
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break;
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case DT_RELSZ:
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relsz = dynp->d_un.d_val;
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break;
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case DT_SYMTAB:
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symtab = (const Elf_Sym *)(relocbase + dynp->d_un.d_ptr);
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break;
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case DT_PLTGOT:
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got = (Elf_Addr *)(relocbase + dynp->d_un.d_ptr);
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break;
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case DT_MIPS_LOCAL_GOTNO:
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local_gotno = dynp->d_un.d_val;
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break;
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case DT_MIPS_SYMTABNO:
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symtabno = dynp->d_un.d_val;
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break;
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case DT_MIPS_GOTSYM:
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gotsym = dynp->d_un.d_val;
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break;
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}
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}
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i = GOT1_RESERVED_FOR_RTLD(got) ? 2 : 1;
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/* Relocate the local GOT entries */
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got += i;
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for (; i < local_gotno; i++) {
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*got++ += relocbase;
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}
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sym = symtab + gotsym;
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/* Now do the global GOT entries */
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for (i = gotsym; i < symtabno; i++) {
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*got = sym->st_value + relocbase;
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++sym;
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++got;
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}
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rellim = (const Elf_Rel *)((const char *)rel + relsz);
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for (; rel < rellim; rel++) {
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Elf_Word r_symndx, r_type;
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where = (void *)(relocbase + rel->r_offset);
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r_symndx = ELF_R_SYM(rel->r_info);
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r_type = ELF_R_TYPE(rel->r_info);
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switch (r_type & 0xff) {
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case R_TYPE(REL32): {
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const size_t rlen =
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ELF_R_NXTTYPE_64_P(r_type)
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? sizeof(Elf_Sxword)
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: sizeof(Elf_Sword);
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Elf_Sxword old = load_ptr(where, rlen);
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Elf_Sxword val = old;
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#ifdef __mips_n64
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assert(r_type == R_TYPE(REL32)
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|| r_type == (R_TYPE(REL32)|(R_TYPE(64) << 8)));
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#endif
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assert(r_symndx < gotsym);
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sym = symtab + r_symndx;
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assert(ELF_ST_BIND(sym->st_info) == STB_LOCAL);
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val += relocbase;
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dbg("REL32/L(%p) %p -> %p in <self>",
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where, (void *)old, (void *)val);
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store_ptr(where, val, rlen);
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break;
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}
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case R_TYPE(GPREL32):
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case R_TYPE(NONE):
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break;
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default:
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abort();
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break;
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}
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}
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}
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Elf_Addr
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_mips_rtld_bind(Obj_Entry *obj, Elf_Size reloff)
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{
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Elf_Addr *got = obj->pltgot;
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const Elf_Sym *def;
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const Obj_Entry *defobj;
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Elf_Addr *where;
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Elf_Addr target;
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RtldLockState lockstate;
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rlock_acquire(rtld_bind_lock, &lockstate);
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if (sigsetjmp(lockstate.env, 0) != 0)
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lock_upgrade(rtld_bind_lock, &lockstate);
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where = &got[obj->local_gotno + reloff - obj->gotsym];
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def = find_symdef(reloff, obj, &defobj, SYMLOOK_IN_PLT, NULL,
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&lockstate);
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if (def == NULL)
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rtld_die();
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target = (Elf_Addr)(defobj->relocbase + def->st_value);
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dbg("bind now/fixup at %s sym # %jd in %s --> was=%p new=%p",
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obj->path,
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(intmax_t)reloff, defobj->strtab + def->st_name,
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(void *)*where, (void *)target);
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if (!ld_bind_not)
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*where = target;
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lock_release(rtld_bind_lock, &lockstate);
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return (Elf_Addr)target;
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}
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int
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reloc_non_plt(Obj_Entry *obj, Obj_Entry *obj_rtld, int flags,
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RtldLockState *lockstate)
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{
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const Elf_Rel *rel;
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const Elf_Rel *rellim;
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Elf_Addr *got = obj->pltgot;
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const Elf_Sym *sym, *def;
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const Obj_Entry *defobj;
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Elf_Word i;
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#ifdef SUPPORT_OLD_BROKEN_LD
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int broken;
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#endif
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/* The relocation for the dynamic loader has already been done. */
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if (obj == obj_rtld)
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return (0);
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if ((flags & SYMLOOK_IFUNC) != 0)
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/* XXX not implemented */
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return (0);
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#ifdef SUPPORT_OLD_BROKEN_LD
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broken = 0;
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sym = obj->symtab;
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for (i = 1; i < 12; i++)
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if (sym[i].st_info == ELF_ST_INFO(STB_LOCAL, STT_NOTYPE))
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||||||
broken = 1;
|
|
||||||
dbg("%s: broken=%d", obj->path, broken);
|
|
||||||
#endif
|
|
||||||
|
|
||||||
i = GOT1_RESERVED_FOR_RTLD(got) ? 2 : 1;
|
|
||||||
|
|
||||||
/* Relocate the local GOT entries */
|
|
||||||
got += i;
|
|
||||||
dbg("got:%p for %d entries adding %p",
|
|
||||||
got, obj->local_gotno, obj->relocbase);
|
|
||||||
for (; i < obj->local_gotno; i++) {
|
|
||||||
*got += (Elf_Addr)obj->relocbase;
|
|
||||||
got++;
|
|
||||||
}
|
|
||||||
sym = obj->symtab + obj->gotsym;
|
|
||||||
|
|
||||||
dbg("got:%p for %d entries",
|
|
||||||
got, obj->symtabno);
|
|
||||||
/* Now do the global GOT entries */
|
|
||||||
for (i = obj->gotsym; i < obj->symtabno; i++) {
|
|
||||||
dbg(" doing got %d sym %p (%s, %lx)", i - obj->gotsym, sym,
|
|
||||||
sym->st_name + obj->strtab, (u_long) *got);
|
|
||||||
|
|
||||||
#ifdef SUPPORT_OLD_BROKEN_LD
|
|
||||||
if (ELF_ST_TYPE(sym->st_info) == STT_FUNC &&
|
|
||||||
broken && sym->st_shndx == SHN_UNDEF) {
|
|
||||||
/*
|
|
||||||
* XXX DANGER WILL ROBINSON!
|
|
||||||
* You might think this is stupid, as it intentionally
|
|
||||||
* defeats lazy binding -- and you'd be right.
|
|
||||||
* Unfortunately, for lazy binding to work right, we
|
|
||||||
* need to a way to force the GOT slots used for
|
|
||||||
* function pointers to be resolved immediately. This
|
|
||||||
* is supposed to be done automatically by the linker,
|
|
||||||
* by not outputting a PLT slot and setting st_value
|
|
||||||
* to 0 if there are non-PLT references, but older
|
|
||||||
* versions of GNU ld do not do this.
|
|
||||||
*/
|
|
||||||
def = find_symdef(i, obj, &defobj, flags, NULL,
|
|
||||||
lockstate);
|
|
||||||
if (def == NULL)
|
|
||||||
return -1;
|
|
||||||
*got = def->st_value + (Elf_Addr)defobj->relocbase;
|
|
||||||
} else
|
|
||||||
#endif
|
|
||||||
if (ELF_ST_TYPE(sym->st_info) == STT_FUNC &&
|
|
||||||
sym->st_value != 0 && sym->st_shndx == SHN_UNDEF) {
|
|
||||||
/*
|
|
||||||
* If there are non-PLT references to the function,
|
|
||||||
* st_value should be 0, forcing us to resolve the
|
|
||||||
* address immediately.
|
|
||||||
*
|
|
||||||
* XXX DANGER WILL ROBINSON!
|
|
||||||
* The linker is not outputting PLT slots for calls to
|
|
||||||
* functions that are defined in the same shared
|
|
||||||
* library. This is a bug, because it can screw up
|
|
||||||
* link ordering rules if the symbol is defined in
|
|
||||||
* more than one module. For now, if there is a
|
|
||||||
* definition, we fail the test above and force a full
|
|
||||||
* symbol lookup. This means that all intra-module
|
|
||||||
* calls are bound immediately. - mycroft, 2003/09/24
|
|
||||||
*/
|
|
||||||
*got = sym->st_value + (Elf_Addr)obj->relocbase;
|
|
||||||
if ((Elf_Addr)(*got) == (Elf_Addr)obj->relocbase) {
|
|
||||||
dbg("Warning2, i:%d maps to relocbase address:%p",
|
|
||||||
i, obj->relocbase);
|
|
||||||
}
|
|
||||||
|
|
||||||
} else if (sym->st_info == ELF_ST_INFO(STB_GLOBAL, STT_SECTION)) {
|
|
||||||
/* Symbols with index SHN_ABS are not relocated. */
|
|
||||||
if (sym->st_shndx != SHN_ABS) {
|
|
||||||
*got = sym->st_value +
|
|
||||||
(Elf_Addr)obj->relocbase;
|
|
||||||
if ((Elf_Addr)(*got) == (Elf_Addr)obj->relocbase) {
|
|
||||||
dbg("Warning3, i:%d maps to relocbase address:%p",
|
|
||||||
i, obj->relocbase);
|
|
||||||
}
|
|
||||||
}
|
|
||||||
} else {
|
|
||||||
/* TODO: add cache here */
|
|
||||||
def = find_symdef(i, obj, &defobj, flags, NULL,
|
|
||||||
lockstate);
|
|
||||||
if (def == NULL) {
|
|
||||||
dbg("Warning4, can't find symbole %d", i);
|
|
||||||
return -1;
|
|
||||||
}
|
|
||||||
*got = def->st_value + (Elf_Addr)defobj->relocbase;
|
|
||||||
if ((Elf_Addr)(*got) == (Elf_Addr)obj->relocbase) {
|
|
||||||
dbg("Warning4, i:%d maps to relocbase address:%p",
|
|
||||||
i, obj->relocbase);
|
|
||||||
dbg("via first obj symbol %s",
|
|
||||||
obj->strtab + obj->symtab[i].st_name);
|
|
||||||
dbg("found in obj %p:%s",
|
|
||||||
defobj, defobj->path);
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
dbg(" --> now %lx", (u_long) *got);
|
|
||||||
++sym;
|
|
||||||
++got;
|
|
||||||
}
|
|
||||||
|
|
||||||
got = obj->pltgot;
|
|
||||||
rellim = (const Elf_Rel *)((const char *)obj->rel + obj->relsize);
|
|
||||||
for (rel = obj->rel; rel < rellim; rel++) {
|
|
||||||
Elf_Word r_symndx, r_type;
|
|
||||||
void *where;
|
|
||||||
|
|
||||||
where = obj->relocbase + rel->r_offset;
|
|
||||||
r_symndx = ELF_R_SYM(rel->r_info);
|
|
||||||
r_type = ELF_R_TYPE(rel->r_info);
|
|
||||||
|
|
||||||
switch (r_type & 0xff) {
|
|
||||||
case R_TYPE(NONE):
|
|
||||||
break;
|
|
||||||
|
|
||||||
case R_TYPE(REL32): {
|
|
||||||
/* 32-bit PC-relative reference */
|
|
||||||
const size_t rlen =
|
|
||||||
ELF_R_NXTTYPE_64_P(r_type)
|
|
||||||
? sizeof(Elf_Sxword)
|
|
||||||
: sizeof(Elf_Sword);
|
|
||||||
Elf_Sxword old = load_ptr(where, rlen);
|
|
||||||
Elf_Sxword val = old;
|
|
||||||
|
|
||||||
def = obj->symtab + r_symndx;
|
|
||||||
|
|
||||||
if (r_symndx >= obj->gotsym) {
|
|
||||||
val += got[obj->local_gotno + r_symndx - obj->gotsym];
|
|
||||||
dbg("REL32/G(%p) %p --> %p (%s) in %s",
|
|
||||||
where, (void *)old, (void *)val,
|
|
||||||
obj->strtab + def->st_name,
|
|
||||||
obj->path);
|
|
||||||
} else {
|
|
||||||
/*
|
|
||||||
* XXX: ABI DIFFERENCE!
|
|
||||||
*
|
|
||||||
* Old NetBSD binutils would generate shared
|
|
||||||
* libs with section-relative relocations being
|
|
||||||
* already adjusted for the start address of
|
|
||||||
* the section.
|
|
||||||
*
|
|
||||||
* New binutils, OTOH, generate shared libs
|
|
||||||
* with the same relocations being based at
|
|
||||||
* zero, so we need to add in the start address
|
|
||||||
* of the section.
|
|
||||||
*
|
|
||||||
* --rkb, Oct 6, 2001
|
|
||||||
*/
|
|
||||||
|
|
||||||
if (def->st_info ==
|
|
||||||
ELF_ST_INFO(STB_LOCAL, STT_SECTION)
|
|
||||||
#ifdef SUPPORT_OLD_BROKEN_LD
|
|
||||||
&& !broken
|
|
||||||
#endif
|
|
||||||
)
|
|
||||||
val += (Elf_Addr)def->st_value;
|
|
||||||
|
|
||||||
val += (Elf_Addr)obj->relocbase;
|
|
||||||
|
|
||||||
dbg("REL32/L(%p) %p -> %p (%s) in %s",
|
|
||||||
where, (void *)old, (void *)val,
|
|
||||||
obj->strtab + def->st_name, obj->path);
|
|
||||||
}
|
|
||||||
store_ptr(where, val, rlen);
|
|
||||||
break;
|
|
||||||
}
|
|
||||||
|
|
||||||
case R_TYPE(COPY):
|
|
||||||
/*
|
|
||||||
* These are deferred until all other relocations have
|
|
||||||
* been done. All we do here is make sure that the
|
|
||||||
* COPY relocation is not in a shared library. They
|
|
||||||
* are allowed only in executable files.
|
|
||||||
*/
|
|
||||||
if (!obj->mainprog) {
|
|
||||||
_rtld_error("%s: Unexpected R_MIPS_COPY "
|
|
||||||
"relocation in shared library", obj->path);
|
|
||||||
return (-1);
|
|
||||||
}
|
|
||||||
break;
|
|
||||||
|
|
||||||
#ifdef __mips_n64
|
|
||||||
case R_TYPE(TLS_DTPMOD64):
|
|
||||||
#else
|
|
||||||
case R_TYPE(TLS_DTPMOD32):
|
|
||||||
#endif
|
|
||||||
{
|
|
||||||
|
|
||||||
const size_t rlen = sizeof(Elf_Addr);
|
|
||||||
Elf_Addr old = load_ptr(where, rlen);
|
|
||||||
Elf_Addr val = old;
|
|
||||||
|
|
||||||
def = find_symdef(r_symndx, obj, &defobj, flags, NULL,
|
|
||||||
lockstate);
|
|
||||||
if (def == NULL)
|
|
||||||
return -1;
|
|
||||||
|
|
||||||
val += (Elf_Addr)defobj->tlsindex;
|
|
||||||
|
|
||||||
store_ptr(where, val, rlen);
|
|
||||||
dbg("DTPMOD %s in %s %p --> %p in %s",
|
|
||||||
obj->strtab + obj->symtab[r_symndx].st_name,
|
|
||||||
obj->path, (void *)old, (void*)val, defobj->path);
|
|
||||||
break;
|
|
||||||
}
|
|
||||||
|
|
||||||
#ifdef __mips_n64
|
|
||||||
case R_TYPE(TLS_DTPREL64):
|
|
||||||
#else
|
|
||||||
case R_TYPE(TLS_DTPREL32):
|
|
||||||
#endif
|
|
||||||
{
|
|
||||||
const size_t rlen = sizeof(Elf_Addr);
|
|
||||||
Elf_Addr old = load_ptr(where, rlen);
|
|
||||||
Elf_Addr val = old;
|
|
||||||
|
|
||||||
def = find_symdef(r_symndx, obj, &defobj, flags, NULL,
|
|
||||||
lockstate);
|
|
||||||
if (def == NULL)
|
|
||||||
return -1;
|
|
||||||
|
|
||||||
if (!defobj->tls_done && !allocate_tls_offset(obj))
|
|
||||||
return -1;
|
|
||||||
|
|
||||||
val += (Elf_Addr)def->st_value - TLS_DTV_OFFSET;
|
|
||||||
store_ptr(where, val, rlen);
|
|
||||||
|
|
||||||
dbg("DTPREL %s in %s %p --> %p in %s",
|
|
||||||
obj->strtab + obj->symtab[r_symndx].st_name,
|
|
||||||
obj->path, (void*)old, (void *)val, defobj->path);
|
|
||||||
break;
|
|
||||||
}
|
|
||||||
|
|
||||||
#ifdef __mips_n64
|
|
||||||
case R_TYPE(TLS_TPREL64):
|
|
||||||
#else
|
|
||||||
case R_TYPE(TLS_TPREL32):
|
|
||||||
#endif
|
|
||||||
{
|
|
||||||
const size_t rlen = sizeof(Elf_Addr);
|
|
||||||
Elf_Addr old = load_ptr(where, rlen);
|
|
||||||
Elf_Addr val = old;
|
|
||||||
|
|
||||||
def = find_symdef(r_symndx, obj, &defobj, flags, NULL,
|
|
||||||
lockstate);
|
|
||||||
|
|
||||||
if (def == NULL)
|
|
||||||
return -1;
|
|
||||||
|
|
||||||
if (!defobj->tls_done && !allocate_tls_offset(obj))
|
|
||||||
return -1;
|
|
||||||
|
|
||||||
val += (Elf_Addr)(def->st_value + defobj->tlsoffset
|
|
||||||
- TLS_TP_OFFSET - TLS_TCB_SIZE);
|
|
||||||
store_ptr(where, val, rlen);
|
|
||||||
|
|
||||||
dbg("TPREL %s in %s %p --> %p in %s",
|
|
||||||
obj->strtab + obj->symtab[r_symndx].st_name,
|
|
||||||
obj->path, (void*)old, (void *)val, defobj->path);
|
|
||||||
break;
|
|
||||||
}
|
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
default:
|
|
||||||
dbg("sym = %lu, type = %lu, offset = %p, "
|
|
||||||
"contents = %p, symbol = %s",
|
|
||||||
(u_long)r_symndx, (u_long)ELF_R_TYPE(rel->r_info),
|
|
||||||
(void *)rel->r_offset,
|
|
||||||
(void *)load_ptr(where, sizeof(Elf_Sword)),
|
|
||||||
obj->strtab + obj->symtab[r_symndx].st_name);
|
|
||||||
_rtld_error("%s: Unsupported relocation type %ld "
|
|
||||||
"in non-PLT relocations",
|
|
||||||
obj->path, (u_long) ELF_R_TYPE(rel->r_info));
|
|
||||||
return -1;
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
return 0;
|
|
||||||
}
|
|
||||||
|
|
||||||
/*
|
|
||||||
* Process the PLT relocations.
|
|
||||||
*/
|
|
||||||
int
|
|
||||||
reloc_plt(Obj_Entry *obj, int flags __unused, RtldLockState *lockstate __unused)
|
|
||||||
{
|
|
||||||
const Elf_Rel *rellim;
|
|
||||||
const Elf_Rel *rel;
|
|
||||||
|
|
||||||
rellim = (const Elf_Rel *)((const char *)obj->pltrel + obj->pltrelsize);
|
|
||||||
for (rel = obj->pltrel; rel < rellim; rel++) {
|
|
||||||
Elf_Addr *where;
|
|
||||||
|
|
||||||
switch (ELF_R_TYPE(rel->r_info)) {
|
|
||||||
case R_MIPS_JUMP_SLOT:
|
|
||||||
where = (Elf_Addr *)(obj->relocbase + rel->r_offset);
|
|
||||||
*where += (Elf_Addr )obj->relocbase;
|
|
||||||
break;
|
|
||||||
default:
|
|
||||||
_rtld_error("Unknown relocation type %u in PLT",
|
|
||||||
(unsigned int)ELF_R_TYPE(rel->r_info));
|
|
||||||
return (-1);
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
return (0);
|
|
||||||
}
|
|
||||||
|
|
||||||
/*
|
|
||||||
* LD_BIND_NOW was set - force relocation for all jump slots
|
|
||||||
*/
|
|
||||||
int
|
|
||||||
reloc_jmpslots(Obj_Entry *obj, int flags, RtldLockState *lockstate)
|
|
||||||
{
|
|
||||||
const Obj_Entry *defobj;
|
|
||||||
const Elf_Rel *rellim;
|
|
||||||
const Elf_Rel *rel;
|
|
||||||
const Elf_Sym *def;
|
|
||||||
|
|
||||||
rellim = (const Elf_Rel *)((const char *)obj->pltrel + obj->pltrelsize);
|
|
||||||
for (rel = obj->pltrel; rel < rellim; rel++) {
|
|
||||||
Elf_Addr *where;
|
|
||||||
|
|
||||||
switch (ELF_R_TYPE(rel->r_info)) {
|
|
||||||
case R_MIPS_JUMP_SLOT:
|
|
||||||
def = find_symdef(ELF_R_SYM(rel->r_info), obj,
|
|
||||||
&defobj, SYMLOOK_IN_PLT | flags, NULL, lockstate);
|
|
||||||
if (def == NULL) {
|
|
||||||
dbg("reloc_jmpslots: sym not found");
|
|
||||||
return (-1);
|
|
||||||
}
|
|
||||||
|
|
||||||
where = (Elf_Addr *)(obj->relocbase + rel->r_offset);
|
|
||||||
*where = (Elf_Addr)(defobj->relocbase + def->st_value);
|
|
||||||
break;
|
|
||||||
default:
|
|
||||||
_rtld_error("Unknown relocation type %u in PLT",
|
|
||||||
(unsigned int)ELF_R_TYPE(rel->r_info));
|
|
||||||
return (-1);
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
return (0);
|
|
||||||
}
|
|
||||||
|
|
||||||
int
|
|
||||||
reloc_iresolve(Obj_Entry *obj __unused,
|
|
||||||
struct Struct_RtldLockState *lockstate __unused)
|
|
||||||
{
|
|
||||||
|
|
||||||
/* XXX not implemented */
|
|
||||||
return (0);
|
|
||||||
}
|
|
||||||
|
|
||||||
int
|
|
||||||
reloc_iresolve_nonplt(Obj_Entry *obj __unused,
|
|
||||||
struct Struct_RtldLockState *lockstate __unused)
|
|
||||||
{
|
|
||||||
|
|
||||||
/* XXX not implemented */
|
|
||||||
return (0);
|
|
||||||
}
|
|
||||||
|
|
||||||
int
|
|
||||||
reloc_gnu_ifunc(Obj_Entry *obj __unused, int flags __unused,
|
|
||||||
struct Struct_RtldLockState *lockstate __unused)
|
|
||||||
{
|
|
||||||
|
|
||||||
/* XXX not implemented */
|
|
||||||
return (0);
|
|
||||||
}
|
|
||||||
|
|
||||||
Elf_Addr
|
|
||||||
reloc_jmpslot(Elf_Addr *where, Elf_Addr target,
|
|
||||||
const Obj_Entry *defobj __unused, const Obj_Entry *obj __unused,
|
|
||||||
const Elf_Rel *rel)
|
|
||||||
{
|
|
||||||
|
|
||||||
assert(ELF_R_TYPE(rel->r_info) == R_MIPS_JUMP_SLOT);
|
|
||||||
|
|
||||||
if (*where != target && !ld_bind_not)
|
|
||||||
*where = target;
|
|
||||||
return (target);
|
|
||||||
}
|
|
||||||
|
|
||||||
void
|
|
||||||
ifunc_init(Elf_Auxinfo aux_info[__min_size(AT_COUNT)] __unused)
|
|
||||||
{
|
|
||||||
|
|
||||||
}
|
|
||||||
|
|
||||||
void
|
|
||||||
allocate_initial_tls(Obj_Entry *objs)
|
|
||||||
{
|
|
||||||
|
|
||||||
/*
|
|
||||||
* Fix the size of the static TLS block by using the maximum
|
|
||||||
* offset allocated so far and adding a bit for dynamic modules to
|
|
||||||
* use.
|
|
||||||
*/
|
|
||||||
tls_static_space = tls_last_offset + tls_last_size + RTLD_STATIC_TLS_EXTRA;
|
|
||||||
|
|
||||||
_tcb_set(allocate_tls(objs, NULL, TLS_TCB_SIZE, TLS_TCB_ALIGN));
|
|
||||||
}
|
|
||||||
|
|
||||||
void *
|
|
||||||
__tls_get_addr(tls_index* ti)
|
|
||||||
{
|
|
||||||
uintptr_t **dtvp;
|
|
||||||
char *p;
|
|
||||||
|
|
||||||
dtvp = &_tcb_get()->tcb_dtv;
|
|
||||||
p = tls_get_addr_common(dtvp, ti->ti_module, ti->ti_offset);
|
|
||||||
|
|
||||||
return (p + TLS_DTV_OFFSET);
|
|
||||||
}
|
|
||||||
@ -1,80 +0,0 @@
|
|||||||
/*-
|
|
||||||
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
|
|
||||||
*
|
|
||||||
* Copyright (c) 1999, 2000 John D. Polstra.
|
|
||||||
* 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.
|
|
||||||
*
|
|
||||||
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
|
|
||||||
*
|
|
||||||
* $FreeBSD$
|
|
||||||
*/
|
|
||||||
|
|
||||||
#ifndef RTLD_MACHDEP_H
|
|
||||||
#define RTLD_MACHDEP_H 1
|
|
||||||
|
|
||||||
#include <sys/types.h>
|
|
||||||
#include <machine/atomic.h>
|
|
||||||
#include <machine/tls.h>
|
|
||||||
|
|
||||||
struct Struct_Obj_Entry;
|
|
||||||
|
|
||||||
/* Return the address of the .dynamic section in the dynamic linker. */
|
|
||||||
#define rtld_dynamic(obj) (&_DYNAMIC)
|
|
||||||
|
|
||||||
Elf_Addr reloc_jmpslot(Elf_Addr *where, Elf_Addr target,
|
|
||||||
const struct Struct_Obj_Entry *defobj, const struct Struct_Obj_Entry *obj,
|
|
||||||
const Elf_Rel *rel);
|
|
||||||
Elf_Addr _mips_rtld_bind(struct Struct_Obj_Entry *obj, Elf_Size reloff);
|
|
||||||
|
|
||||||
#define make_function_pointer(def, defobj) \
|
|
||||||
((defobj)->relocbase + (def)->st_value)
|
|
||||||
|
|
||||||
#define call_initfini_pointer(obj, target) \
|
|
||||||
(((InitFunc)(target))())
|
|
||||||
|
|
||||||
#define call_init_pointer(obj, target) \
|
|
||||||
(((InitArrFunc)(target))(main_argc, main_argv, environ))
|
|
||||||
|
|
||||||
#define call_ifunc_resolver(ptr) \
|
|
||||||
(((Elf_Addr (*)(void))ptr)())
|
|
||||||
|
|
||||||
typedef struct {
|
|
||||||
unsigned long ti_module;
|
|
||||||
unsigned long ti_offset;
|
|
||||||
} tls_index;
|
|
||||||
|
|
||||||
#define round(size, align) \
|
|
||||||
(((size) + (align) - 1) & ~((align) - 1))
|
|
||||||
#define calculate_first_tls_offset(size, align, offset) \
|
|
||||||
TLS_TCB_SIZE
|
|
||||||
#define calculate_tls_offset(prev_offset, prev_size, size, align, offset) \
|
|
||||||
round(prev_offset + prev_size, align)
|
|
||||||
#define calculate_tls_post_size(align) 0
|
|
||||||
|
|
||||||
extern void *__tls_get_addr(tls_index *ti);
|
|
||||||
|
|
||||||
#define RTLD_DEFAULT_STACK_PF_EXEC PF_X
|
|
||||||
#define RTLD_DEFAULT_STACK_EXEC PROT_EXEC
|
|
||||||
|
|
||||||
#define md_abi_variant_hook(x)
|
|
||||||
|
|
||||||
#endif
|
|
||||||
@ -1,289 +0,0 @@
|
|||||||
/* $NetBSD: rtld_start.S,v 1.10 2009/12/14 00:41:19 matt Exp $ */
|
|
||||||
|
|
||||||
/*
|
|
||||||
* Copyright 1997 Michael L. Hitch <mhitch@montana.edu>
|
|
||||||
* Portions copyright 2002 Charles M. Hannum <root@ihack.net>
|
|
||||||
* 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. 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 <machine/asm.h>
|
|
||||||
|
|
||||||
#if defined(__clang__) || (defined(__GNUC__) && __GNUC__ > 4)
|
|
||||||
.cfi_sections .debug_frame
|
|
||||||
#endif
|
|
||||||
|
|
||||||
.globl _C_LABEL(_rtld_relocate_nonplt_self)
|
|
||||||
.globl _C_LABEL(_rtld)
|
|
||||||
|
|
||||||
#define PTR_SIZE (1<<PTR_SCALESHIFT)
|
|
||||||
|
|
||||||
/*
|
|
||||||
* a0 stack pointer
|
|
||||||
* a1 rtld cleanup (filled in by dynamic loader)
|
|
||||||
* a2 rtld object (filled in by dynamic loader)
|
|
||||||
* a3 ps_strings
|
|
||||||
*/
|
|
||||||
NESTED(rtld_start, 4*PTR_SIZE, ra)
|
|
||||||
.mask 0x10090000,-PTR_SIZE
|
|
||||||
.set noreorder
|
|
||||||
SETUP_GP
|
|
||||||
PTR_SUBU sp, 4*PTR_SIZE /* adjust stack pointer */
|
|
||||||
SETUP_GP64(s4, rtld_start)
|
|
||||||
SAVE_GP(0)
|
|
||||||
/* -> 1*PTR_SIZE(sp) for atexit */
|
|
||||||
/* -> 2*PTR_SIZE(sp) for obj_main */
|
|
||||||
move s0, a0 /* save stack pointer from a0 */
|
|
||||||
move s3, a3 /* save ps_strings pointer */
|
|
||||||
|
|
||||||
PTR_LA a1, 1f
|
|
||||||
bal 1f
|
|
||||||
PTR_LA t0, _C_LABEL(_rtld_relocate_nonplt_self)
|
|
||||||
1: PTR_SUBU a1, ra, a1 /* relocbase */
|
|
||||||
PTR_LA a0, _DYNAMIC
|
|
||||||
PTR_ADDU t9, a1, t0
|
|
||||||
jalr t9 /* _rtld_relocate_nonplt_self(dynp, relocabase) */
|
|
||||||
PTR_ADDU a0, a1, a0 /* &_DYNAMIC */
|
|
||||||
|
|
||||||
move a0, s0 /* sp */
|
|
||||||
PTR_ADDU a1, sp, 2*PTR_SIZE /* &our atexit function */
|
|
||||||
PTR_ADDU a2, sp, 3*PTR_SIZE /* obj_main entry */
|
|
||||||
PTR_SUBU sp, 4*SZREG /* ABI requires to reserve memory for 4 regs */
|
|
||||||
PTR_LA t9, _C_LABEL(_rtld)
|
|
||||||
jalr t9 /* v0 = _rtld(sp, cleanup, objp) */
|
|
||||||
nop
|
|
||||||
PTR_ADDU sp, 4*SZREG
|
|
||||||
|
|
||||||
PTR_L a1, 2*PTR_SIZE(sp) /* our atexit function */
|
|
||||||
PTR_L a2, 3*PTR_SIZE(sp) /* obj_main entry */
|
|
||||||
PTR_ADDU sp, 4*PTR_SIZE /* readjust stack */
|
|
||||||
move a0, s0 /* stack pointer */
|
|
||||||
move t9, v0
|
|
||||||
PTR_SUBU sp, 4*SZREG /* ABI requires to reserve memory for 4 regs */
|
|
||||||
move ra,t9 /* RA == PC signals backtrace routine to stop */
|
|
||||||
j t9 /* _start(sp, cleanup, obj); */
|
|
||||||
move a3, s3 /* restore ps_strings */
|
|
||||||
END(rtld_start)
|
|
||||||
|
|
||||||
#define XCALLFRAME_SIZ (12*SZREG)
|
|
||||||
#define XCALLFRAME_RA (10*SZREG)
|
|
||||||
#define XCALLFRAME_GP (9*SZREG)
|
|
||||||
#define XCALLFRAME_S0 (8*SZREG)
|
|
||||||
#define XCALLFRAME_A3 (7*SZREG)
|
|
||||||
#define XCALLFRAME_A2 (6*SZREG)
|
|
||||||
#define XCALLFRAME_A1 (5*SZREG)
|
|
||||||
#define XCALLFRAME_A0 (4*SZREG)
|
|
||||||
#if defined(__mips_n32) || defined(__mips_n64)
|
|
||||||
#define XCALLFRAME_A7 (3*SZREG)
|
|
||||||
#define XCALLFRAME_A6 (2*SZREG)
|
|
||||||
#define XCALLFRAME_A5 (1*SZREG)
|
|
||||||
#define XCALLFRAME_A4 (0*SZREG)
|
|
||||||
#endif
|
|
||||||
|
|
||||||
/*
|
|
||||||
* Trampoline for "old" PLT stubs which use .got entries.
|
|
||||||
*/
|
|
||||||
.globl _rtld_bind_start
|
|
||||||
.ent _rtld_bind_start
|
|
||||||
_rtld_bind_start:
|
|
||||||
.frame sp, XCALLFRAME_SIZ, $15
|
|
||||||
.cfi_startproc simple
|
|
||||||
.cfi_def_cfa sp, 0
|
|
||||||
.cfi_register ra, $15
|
|
||||||
move v1, gp /* save old GP */
|
|
||||||
#if defined(__mips_o32) || defined(__mips_o64)
|
|
||||||
PTR_ADDU t9, 8 /* modify T9 to point at .cpload */
|
|
||||||
#endif
|
|
||||||
SETUP_GP
|
|
||||||
PTR_SUBU sp, XCALLFRAME_SIZ /* save arguments and sp value in stack */
|
|
||||||
.cfi_def_cfa_offset XCALLFRAME_SIZ
|
|
||||||
SETUP_GP64(XCALLFRAME_GP, _rtld_bind_start)
|
|
||||||
SAVE_GP(XCALLFRAME_GP)
|
|
||||||
#if defined(__mips_n32) || defined(__mips_n64)
|
|
||||||
REG_S a4, XCALLFRAME_A4(sp)
|
|
||||||
.cfi_rel_offset a4, XCALLFRAME_A4
|
|
||||||
REG_S a5, XCALLFRAME_A5(sp)
|
|
||||||
.cfi_rel_offset a5, XCALLFRAME_A5
|
|
||||||
REG_S a6, XCALLFRAME_A6(sp)
|
|
||||||
.cfi_rel_offset a6, XCALLFRAME_A6
|
|
||||||
REG_S a7, XCALLFRAME_A7(sp)
|
|
||||||
.cfi_rel_offset a7, XCALLFRAME_A7
|
|
||||||
#endif
|
|
||||||
REG_S a0, XCALLFRAME_A0(sp)
|
|
||||||
.cfi_rel_offset a0, XCALLFRAME_A0
|
|
||||||
REG_S a1, XCALLFRAME_A1(sp)
|
|
||||||
.cfi_rel_offset a1, XCALLFRAME_A1
|
|
||||||
REG_S a2, XCALLFRAME_A2(sp)
|
|
||||||
.cfi_rel_offset a2, XCALLFRAME_A2
|
|
||||||
REG_S a3, XCALLFRAME_A3(sp)
|
|
||||||
.cfi_rel_offset a3, XCALLFRAME_A3
|
|
||||||
REG_S $15, XCALLFRAME_RA(sp) /* ra is in t7/t3 */
|
|
||||||
.cfi_rel_offset ra, XCALLFRAME_RA
|
|
||||||
REG_S s0, XCALLFRAME_S0(sp)
|
|
||||||
.cfi_rel_offset s0, XCALLFRAME_S0
|
|
||||||
move s0, sp
|
|
||||||
|
|
||||||
move a0, v1 /* old GP */
|
|
||||||
PTR_SUBU a0, a0, 0x7ff0 /* The offset of $gp from the */
|
|
||||||
/* beginning of the .got section: */
|
|
||||||
/* $gp = .got + 0x7ff0, so */
|
|
||||||
/* .got = $gp - 0x7ff0 */
|
|
||||||
/* Simple math as you can see. */
|
|
||||||
#if defined(__mips_n64)
|
|
||||||
ld a0, 8(a0) /* object = pltgot[1] */
|
|
||||||
and a0, a0, 0x7fffffffffffffff
|
|
||||||
#else
|
|
||||||
lw a0, 4(a0) /* object = pltgot[1] & 0x7fffffff */
|
|
||||||
and a0, a0, 0x7fffffff
|
|
||||||
#endif
|
|
||||||
move a1, t8 /* symbol index */
|
|
||||||
|
|
||||||
PTR_LA t9, _C_LABEL(_mips_rtld_bind)
|
|
||||||
jalr t9
|
|
||||||
nop
|
|
||||||
|
|
||||||
move sp, s0
|
|
||||||
REG_L ra, XCALLFRAME_RA(sp)
|
|
||||||
.cfi_restore ra
|
|
||||||
REG_L s0, XCALLFRAME_S0(sp)
|
|
||||||
.cfi_restore s0
|
|
||||||
REG_L a0, XCALLFRAME_A0(sp)
|
|
||||||
.cfi_restore a0
|
|
||||||
REG_L a1, XCALLFRAME_A1(sp)
|
|
||||||
.cfi_restore a1
|
|
||||||
REG_L a2, XCALLFRAME_A2(sp)
|
|
||||||
.cfi_restore a2
|
|
||||||
REG_L a3, XCALLFRAME_A3(sp)
|
|
||||||
.cfi_restore a3
|
|
||||||
#if defined(__mips_n32) || defined(__mips_n64)
|
|
||||||
REG_L a4, XCALLFRAME_A4(sp)
|
|
||||||
.cfi_restore a4
|
|
||||||
REG_L a5, XCALLFRAME_A5(sp)
|
|
||||||
.cfi_restore a5
|
|
||||||
REG_L a6, XCALLFRAME_A6(sp)
|
|
||||||
.cfi_restore a6
|
|
||||||
REG_L a7, XCALLFRAME_A7(sp)
|
|
||||||
.cfi_restore a7
|
|
||||||
#endif
|
|
||||||
RESTORE_GP64
|
|
||||||
PTR_ADDU sp, XCALLFRAME_SIZ
|
|
||||||
move t9, v0
|
|
||||||
jr t9
|
|
||||||
nop
|
|
||||||
.cfi_endproc
|
|
||||||
END(_rtld_bind_start)
|
|
||||||
|
|
||||||
|
|
||||||
/*
|
|
||||||
* Trampoline for PLT stubs using .pltrel entries and .got.plt.
|
|
||||||
*/
|
|
||||||
.globl _rtld_pltbind_start
|
|
||||||
.ent _rtld_pltbind_start
|
|
||||||
_rtld_pltbind_start:
|
|
||||||
.frame sp, XCALLFRAME_SIZ, $15
|
|
||||||
.cfi_startproc simple
|
|
||||||
.cfi_def_cfa sp, 0
|
|
||||||
.cfi_register ra, $15
|
|
||||||
#if defined(__mips_o32)
|
|
||||||
move v1, gp /* save pointer to .got.plt */
|
|
||||||
#else
|
|
||||||
move v1, t2 /* save pointer to .got.plt */
|
|
||||||
#endif
|
|
||||||
#if defined(__mips_o32) || defined(__mips_o64)
|
|
||||||
PTR_ADDU t9, 8 /* modify T9 to point at .cpload */
|
|
||||||
#endif
|
|
||||||
SETUP_GP
|
|
||||||
PTR_SUBU sp, XCALLFRAME_SIZ /* save arguments and sp value in stack */
|
|
||||||
.cfi_def_cfa_offset XCALLFRAME_SIZ
|
|
||||||
SETUP_GP64(XCALLFRAME_GP, _rtld_pltbind_start)
|
|
||||||
SAVE_GP(XCALLFRAME_GP)
|
|
||||||
#if defined(__mips_n32) || defined(__mips_n64)
|
|
||||||
REG_S a4, XCALLFRAME_A4(sp)
|
|
||||||
.cfi_rel_offset a4, XCALLFRAME_A4
|
|
||||||
REG_S a5, XCALLFRAME_A5(sp)
|
|
||||||
.cfi_rel_offset a5, XCALLFRAME_A5
|
|
||||||
REG_S a6, XCALLFRAME_A6(sp)
|
|
||||||
.cfi_rel_offset a6, XCALLFRAME_A6
|
|
||||||
REG_S a7, XCALLFRAME_A7(sp)
|
|
||||||
.cfi_rel_offset a7, XCALLFRAME_A7
|
|
||||||
#endif
|
|
||||||
REG_S a0, XCALLFRAME_A0(sp)
|
|
||||||
.cfi_rel_offset a0, XCALLFRAME_A0
|
|
||||||
REG_S a1, XCALLFRAME_A1(sp)
|
|
||||||
.cfi_rel_offset a1, XCALLFRAME_A1
|
|
||||||
REG_S a2, XCALLFRAME_A2(sp)
|
|
||||||
.cfi_rel_offset a2, XCALLFRAME_A2
|
|
||||||
REG_S a3, XCALLFRAME_A3(sp)
|
|
||||||
.cfi_rel_offset a3, XCALLFRAME_A3
|
|
||||||
REG_S $15, XCALLFRAME_RA(sp) /* ra is in t7/t3 */
|
|
||||||
.cfi_rel_offset ra, XCALLFRAME_RA
|
|
||||||
REG_S s0, XCALLFRAME_S0(sp)
|
|
||||||
.cfi_rel_offset s0, XCALLFRAME_S0
|
|
||||||
move s0, sp
|
|
||||||
|
|
||||||
move a0, v1 /* .got.plt */
|
|
||||||
#if defined(__mips_n64)
|
|
||||||
ld a0, 8(a0) /* object = .got.plt[1] */
|
|
||||||
sll a1, t8, 4 /* PLT entry index to .rel.plt offset */
|
|
||||||
#else
|
|
||||||
lw a0, 4(a0) /* object = .got.plt[1] */
|
|
||||||
sll a1, t8, 3 /* PLT entry index to .rel.plt offset */
|
|
||||||
#endif
|
|
||||||
|
|
||||||
PTR_LA t9, _C_LABEL(_rtld_bind)
|
|
||||||
jalr t9
|
|
||||||
nop
|
|
||||||
|
|
||||||
move sp, s0
|
|
||||||
REG_L ra, XCALLFRAME_RA(sp)
|
|
||||||
.cfi_restore ra
|
|
||||||
REG_L s0, XCALLFRAME_S0(sp)
|
|
||||||
.cfi_restore s0
|
|
||||||
REG_L a0, XCALLFRAME_A0(sp)
|
|
||||||
.cfi_restore a0
|
|
||||||
REG_L a1, XCALLFRAME_A1(sp)
|
|
||||||
.cfi_restore a1
|
|
||||||
REG_L a2, XCALLFRAME_A2(sp)
|
|
||||||
.cfi_restore a2
|
|
||||||
REG_L a3, XCALLFRAME_A3(sp)
|
|
||||||
.cfi_restore a3
|
|
||||||
#if defined(__mips_n32) || defined(__mips_n64)
|
|
||||||
REG_L a4, XCALLFRAME_A4(sp)
|
|
||||||
.cfi_restore a4
|
|
||||||
REG_L a5, XCALLFRAME_A5(sp)
|
|
||||||
.cfi_restore a5
|
|
||||||
REG_L a6, XCALLFRAME_A6(sp)
|
|
||||||
.cfi_restore a6
|
|
||||||
REG_L a7, XCALLFRAME_A7(sp)
|
|
||||||
.cfi_restore a7
|
|
||||||
#endif
|
|
||||||
RESTORE_GP64
|
|
||||||
PTR_ADDU sp, XCALLFRAME_SIZ
|
|
||||||
move t9, v0
|
|
||||||
jr t9
|
|
||||||
nop
|
|
||||||
.cfi_endproc
|
|
||||||
END(_rtld_pltbind_start)
|
|
||||||
Loading…
Reference in New Issue
Block a user