[dragonfly.git] / libexec / rtld-elf / i386 / reloc.c

/*-
 * Copyright 1996, 1997, 1998, 1999 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 ``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.
 *
 * $FreeBSD$
 */

/*
 * Dynamic linker for ELF.
 *
 * John Polstra <jdp@polstra.com>.
 */

#include <sys/param.h>
#include <sys/mman.h>
#include <sys/tls.h>

#include <machine/tls.h>

#include <dlfcn.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#include "debug.h"
#include "rtld.h"

/*
 * Process the special R_386_COPY relocations in the main program.  These
 * copy data from a shared object into a region in the main program's BSS
 * segment.
 *
 * Returns 0 on success, -1 on failure.
 */
int
do_copy_relocations(Obj_Entry *dstobj)
{
    const Elf_Rel *rellim;
    const Elf_Rel *rel;

    assert(dstobj->mainprog);	/* COPY relocations are invalid elsewhere */

    rellim = (const Elf_Rel *) ((caddr_t) dstobj->rel + dstobj->relsize);
    for (rel = dstobj->rel;  rel < rellim;  rel++) {
	if (ELF_R_TYPE(rel->r_info) == R_386_COPY) {
	    void *dstaddr;
	    const Elf_Sym *dstsym;
	    const char *name;
	    size_t size;
	    const void *srcaddr;
	    const Elf_Sym *srcsym;
	    const Obj_Entry *srcobj, *defobj;
	    SymLook req;
	    int res;

	    dstaddr = (void *) (dstobj->relocbase + rel->r_offset);
	    dstsym = dstobj->symtab + ELF_R_SYM(rel->r_info);
	    name = dstobj->strtab + dstsym->st_name;
	    size = dstsym->st_size;
	    symlook_init(&req, name);
	    req.ventry = fetch_ventry(dstobj, ELF_R_SYM(rel->r_info));

	    for (srcobj = dstobj->next;  srcobj != NULL;  srcobj = srcobj->next) {
		res = symlook_obj(&req, srcobj);
		if (res == 0) {
		    srcsym = req.sym_out;
		    defobj = req.defobj_out;
		    break;
		}
	    }

	    if (srcobj == NULL) {
		_rtld_error("Undefined symbol \"%s\" referenced from COPY"
		  " relocation in %s", name, dstobj->path);
		return -1;
	    }

	    srcaddr = (const void *) (defobj->relocbase + srcsym->st_value);
	    memcpy(dstaddr, srcaddr, size);
	}
    }

    return 0;
}

/* Initialize the special GOT entries. */
void
init_pltgot(Obj_Entry *obj)
{
    if (obj->pltgot != NULL) {
	obj->pltgot[1] = (Elf_Addr) obj;
	obj->pltgot[2] = (Elf_Addr) &_rtld_bind_start;
    }
}

/* Process the non-PLT relocations. */
int
reloc_non_plt(Obj_Entry *obj, Obj_Entry *obj_rtld, RtldLockState *lockstate)
{
	const Elf_Rel *rellim;
	const Elf_Rel *rel;
	SymCache *cache;
	int r = -1;

	/*
	 * The dynamic loader may be called from a thread, we have
	 * limited amounts of stack available so we cannot use alloca().
	 */
	if (obj != obj_rtld) {
	    cache = calloc(obj->nchains, sizeof(SymCache));
	    /* No need to check for NULL here */
	} else
	    cache = NULL;

	rellim = (const Elf_Rel *) ((caddr_t) obj->rel + obj->relsize);
	for (rel = obj->rel;  rel < rellim;  rel++) {
	    Elf_Addr *where = (Elf_Addr *) (obj->relocbase + rel->r_offset);

	    switch (ELF_R_TYPE(rel->r_info)) {

	    case R_386_NONE:
		break;

	    case R_386_32:
		{
		    const Elf_Sym *def;
		    const Obj_Entry *defobj;

		    def = find_symdef(ELF_R_SYM(rel->r_info), obj, &defobj,
		      false, cache, lockstate);
		    if (def == NULL)
			goto done;

		    *where += (Elf_Addr) (defobj->relocbase + def->st_value);
		}
		break;

	    case R_386_PC32:
		/*
		 * I don't think the dynamic linker should ever see this
		 * type of relocation.  But the binutils-2.6 tools sometimes
		 * generate it.
		 */
		{
		    const Elf_Sym *def;
		    const Obj_Entry *defobj;

		    def = find_symdef(ELF_R_SYM(rel->r_info), obj, &defobj,
		      false, cache, lockstate);
		    if (def == NULL)
			goto done;

		    *where +=
		      (Elf_Addr) (defobj->relocbase + def->st_value) -
		      (Elf_Addr) where;
		}
		break;

	    case R_386_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_386_COPY relocation"
		      " in shared library", obj->path);
		    goto done;
		}
		break;

	    case R_386_GLOB_DAT:
		{
		    const Elf_Sym *def;
		    const Obj_Entry *defobj;

		    def = find_symdef(ELF_R_SYM(rel->r_info), obj, &defobj,
		      false, cache, lockstate);
		    if (def == NULL)
			goto done;

		    *where = (Elf_Addr) (defobj->relocbase + def->st_value);
		}
		break;

	    case R_386_RELATIVE:
		*where += (Elf_Addr) obj->relocbase;
		break;

	    case R_386_TLS_TPOFF:
		{
		    const Elf_Sym *def;
		    const Obj_Entry *defobj;

		    def = find_symdef(ELF_R_SYM(rel->r_info), obj, &defobj,
		      false, cache, lockstate);
		    if (def == NULL)
			goto done;

		    /*
		     * We lazily allocate offsets for static TLS as we
		     * see the first relocation that references the
		     * TLS block. This allows us to support (small
		     * amounts of) static TLS in dynamically loaded
		     * modules. If we run out of space, we generate an
		     * error.
		     */
		    if (!defobj->tls_done) {
			if (!allocate_tls_offset((Obj_Entry*) defobj)) {
			    _rtld_error("%s: No space available for static "
					"Thread Local Storage", obj->path);
			    goto done;
			}
		    }

		    *where += (Elf_Addr) (def->st_value - defobj->tlsoffset);
		}
		break;

	    case R_386_TLS_TPOFF32:
		{
		    const Elf_Sym *def;
		    const Obj_Entry *defobj;

		    def = find_symdef(ELF_R_SYM(rel->r_info), obj, &defobj,
		      false, cache);
		    if (def == NULL)
			goto done;

		    /*
		     * We lazily allocate offsets for static TLS as we
		     * see the first relocation that references the
		     * TLS block. This allows us to support (small
		     * amounts of) static TLS in dynamically loaded
		     * modules. If we run out of space, we generate an
		     * error.
		     */
		    if (!defobj->tls_done) {
			if (!allocate_tls_offset((Obj_Entry*) defobj)) {
			    _rtld_error("%s: No space available for static "
					"Thread Local Storage", obj->path);
			    goto done;
			}
		    }

		    *where += (Elf_Addr) (defobj->tlsoffset - def->st_value);
		}
		break;

	    case R_386_TLS_DTPMOD32:
		{
		    const Elf_Sym *def;
		    const Obj_Entry *defobj;

		    def = find_symdef(ELF_R_SYM(rel->r_info), obj, &defobj,
		      false, cache, lockstate);
		    if (def == NULL)
			goto done;

		    *where += (Elf_Addr) defobj->tlsindex;
		}
		break;

	    case R_386_TLS_DTPOFF32:
		{
		    const Elf_Sym *def;
		    const Obj_Entry *defobj;

		    def = find_symdef(ELF_R_SYM(rel->r_info), obj, &defobj,
		      false, cache, lockstate);
		    if (def == NULL)
			goto done;

		    *where += (Elf_Addr) def->st_value;
		}
		break;

	    default:
		_rtld_error("%s: Unsupported relocation type %d"
		  " in non-PLT relocations\n", obj->path,
		  ELF_R_TYPE(rel->r_info));
		goto done;
	    }
	}
	r = 0;
done:
	if (cache != NULL)
	    free(cache);
	return(r);
}

/* Process the PLT relocations. */
int
reloc_plt(Obj_Entry *obj)
{
    const Elf_Rel *rellim;
    const Elf_Rel *rel;

    rellim = (const Elf_Rel *)((char *)obj->pltrel + obj->pltrelsize);
    for (rel = obj->pltrel;  rel < rellim;  rel++) {
	Elf_Addr *where;

	switch (ELF_R_TYPE(rel->r_info)) {
	case R_386_JMP_SLOT:
	  /* Relocate the GOT slot pointing into the PLT. */
	  where = (Elf_Addr *)(obj->relocbase + rel->r_offset);
	  *where += (Elf_Addr)obj->relocbase;
	  break;

	default:
	  _rtld_error("Unknown relocation type %x in PLT",
	    ELF_R_TYPE(rel->r_info));
	  return (-1);
	}
    }
    return 0;
}

/* Relocate the jump slots in an object. */
int
reloc_jmpslots(Obj_Entry *obj, RtldLockState *lockstate)
{
    const Elf_Rel *rellim;
    const Elf_Rel *rel;

    if (obj->jmpslots_done)
	return 0;
    rellim = (const Elf_Rel *)((char *)obj->pltrel + obj->pltrelsize);
    for (rel = obj->pltrel;  rel < rellim;  rel++) {
	Elf_Addr *where, target;
	const Elf_Sym *def;
	const Obj_Entry *defobj;

	switch (ELF_R_TYPE(rel->r_info)) {
	case R_386_JMP_SLOT:
	  where = (Elf_Addr *)(obj->relocbase + rel->r_offset);
	  def = find_symdef(ELF_R_SYM(rel->r_info), obj, &defobj, true, NULL,
	      lockstate);
	  if (def == NULL)
	      return (-1);
	  target = (Elf_Addr)(defobj->relocbase + def->st_value);
	  reloc_jmpslot(where, target, defobj, obj, rel);
	  break;

	default:
	  _rtld_error("Unknown relocation type %x in PLT",
	    ELF_R_TYPE(rel->r_info));
	  return (-1);
	}
    }

    obj->jmpslots_done = true;
    return 0;
}

/* GNU ABI */
__attribute__((__regparm__(1)))
void *
___tls_get_addr(tls_index *ti)
{
    struct tls_tcb *tcb;

    tcb = tls_get_tcb();
    return tls_get_addr_common((Elf_Addr **)&tcb->tcb_dtv, ti->ti_module, ti->ti_offset);
}

/* Sun ABI */
void *
__tls_get_addr(tls_index *ti)
{
    struct tls_tcb *tcb;

    tcb = tls_get_tcb();
    return tls_get_addr_common((Elf_Addr **)&tcb->tcb_dtv, ti->ti_module, ti->ti_offset);
}

/* Sun ABI */
void *
__tls_get_addr_tcb(struct tls_tcb *tcb, tls_index *ti)
{
    return tls_get_addr_common((Elf_Addr **)&tcb->tcb_dtv, ti->ti_module, ti->ti_offset);
}
Commit	Line	Data
984263bc MD	1	/*-
	2	* Copyright 1996, 1997, 1998, 1999 John D. Polstra.
	3	* All rights reserved.
	4	*
	5	* Redistribution and use in source and binary forms, with or without
	6	* modification, are permitted provided that the following conditions
	7	* are met:
	8	* 1. Redistributions of source code must retain the above copyright
	9	* notice, this list of conditions and the following disclaimer.
	10	* 2. Redistributions in binary form must reproduce the above copyright
	11	* notice, this list of conditions and the following disclaimer in the
	12	* documentation and/or other materials provided with the distribution.
	13	*
	14	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
	15	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
	16	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
	17	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
	18	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
	19	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
	20	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
	21	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	22	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
	23	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	24	*
f4f4bfd5	25	* $FreeBSD$
984263bc MD	26	*/
	27
	28	/*
	29	* Dynamic linker for ELF.
	30	*
	31	* John Polstra <jdp@polstra.com>.
	32	*/
	33
	34	#include <sys/param.h>
	35	#include <sys/mman.h>
55b88cae	36	#include <sys/tls.h>
984263bc	37
9e2ee207 JS	38	#include <machine/tls.h>
9e2ee207 JS	39
984263bc MD	40	#include <dlfcn.h>
	41	#include <err.h>
	42	#include <errno.h>
	43	#include <fcntl.h>
	44	#include <stdarg.h>
	45	#include <stdio.h>
	46	#include <stdlib.h>
	47	#include <string.h>
	48	#include <unistd.h>
	49
	50	#include "debug.h"
	51	#include "rtld.h"
	52
	53	/*
	54	* Process the special R_386_COPY relocations in the main program. These
	55	* copy data from a shared object into a region in the main program's BSS
	56	* segment.
	57	*
	58	* Returns 0 on success, -1 on failure.
	59	*/
	60	int
	61	do_copy_relocations(Obj_Entry *dstobj)
	62	{
	63	const Elf_Rel *rellim;
	64	const Elf_Rel *rel;
	65
	66	assert(dstobj->mainprog); /* COPY relocations are invalid elsewhere */
	67
35b2b265	68	rellim = (const Elf_Rel *) ((caddr_t) dstobj->rel + dstobj->relsize);
984263bc MD	69	for (rel = dstobj->rel; rel < rellim; rel++) {
	70	if (ELF_R_TYPE(rel->r_info) == R_386_COPY) {
	71	void *dstaddr;
	72	const Elf_Sym *dstsym;
	73	const char *name;
984263bc MD	74	size_t size;
	75	const void *srcaddr;
	76	const Elf_Sym *srcsym;
35b2b265 JM	77	const Obj_Entry srcobj, defobj;
	78	SymLook req;
	79	int res;
984263bc MD	80
	81	dstaddr = (void *) (dstobj->relocbase + rel->r_offset);
	82	dstsym = dstobj->symtab + ELF_R_SYM(rel->r_info);
	83	name = dstobj->strtab + dstsym->st_name;
984263bc	84	size = dstsym->st_size;
35b2b265 JM	85	symlook_init(&req, name);
	86	req.ventry = fetch_ventry(dstobj, ELF_R_SYM(rel->r_info));
	87
	88	for (srcobj = dstobj->next; srcobj != NULL; srcobj = srcobj->next) {
	89	res = symlook_obj(&req, srcobj);
	90	if (res == 0) {
	91	srcsym = req.sym_out;
	92	defobj = req.defobj_out;
984263bc	93	break;
35b2b265 JM	94	}
35b2b265 JM	95	}
984263bc MD	96
	97	if (srcobj == NULL) {
	98	_rtld_error("Undefined symbol \"%s\" referenced from COPY"
	99	" relocation in %s", name, dstobj->path);
	100	return -1;
	101	}
	102
35b2b265	103	srcaddr = (const void *) (defobj->relocbase + srcsym->st_value);
984263bc MD	104	memcpy(dstaddr, srcaddr, size);
	105	}
	106	}
	107
	108	return 0;
	109	}
	110
	111	/* Initialize the special GOT entries. */
	112	void
	113	init_pltgot(Obj_Entry *obj)
	114	{
	115	if (obj->pltgot != NULL) {
	116	obj->pltgot[1] = (Elf_Addr) obj;
	117	obj->pltgot[2] = (Elf_Addr) &_rtld_bind_start;
	118	}
	119	}
	120
	121	/* Process the non-PLT relocations. */
	122	int
35b2b265	123	reloc_non_plt(Obj_Entry obj, Obj_Entry obj_rtld, RtldLockState *lockstate)
984263bc MD	124	{
	125	const Elf_Rel *rellim;
	126	const Elf_Rel *rel;
	127	SymCache *cache;
984263bc MD	128	int r = -1;
	129
	130	/*
	131	* The dynamic loader may be called from a thread, we have
	132	* limited amounts of stack available so we cannot use alloca().
	133	*/
fcf53d9b JM	134	if (obj != obj_rtld) {
	135	cache = calloc(obj->nchains, sizeof(SymCache));
	136	/* No need to check for NULL here */
	137	} else
984263bc	138	cache = NULL;
984263bc	139
35b2b265	140	rellim = (const Elf_Rel *) ((caddr_t) obj->rel + obj->relsize);
984263bc MD	141	for (rel = obj->rel; rel < rellim; rel++) {
	142	Elf_Addr where = (Elf_Addr ) (obj->relocbase + rel->r_offset);
	143
	144	switch (ELF_R_TYPE(rel->r_info)) {
	145
	146	case R_386_NONE:
	147	break;
	148
	149	case R_386_32:
	150	{
	151	const Elf_Sym *def;
	152	const Obj_Entry *defobj;
	153
	154	def = find_symdef(ELF_R_SYM(rel->r_info), obj, &defobj,
35b2b265	155	false, cache, lockstate);
984263bc MD	156	if (def == NULL)
	157	goto done;
	158
	159	*where += (Elf_Addr) (defobj->relocbase + def->st_value);
	160	}
	161	break;
	162
	163	case R_386_PC32:
	164	/*
	165	* I don't think the dynamic linker should ever see this
	166	* type of relocation. But the binutils-2.6 tools sometimes
	167	* generate it.
	168	*/
	169	{
	170	const Elf_Sym *def;
	171	const Obj_Entry *defobj;
	172
	173	def = find_symdef(ELF_R_SYM(rel->r_info), obj, &defobj,
35b2b265	174	false, cache, lockstate);
984263bc MD	175	if (def == NULL)
	176	goto done;
	177
	178	*where +=
	179	(Elf_Addr) (defobj->relocbase + def->st_value) -
	180	(Elf_Addr) where;
	181	}
	182	break;
	183
	184	case R_386_COPY:
	185	/*
	186	* These are deferred until all other relocations have
	187	* been done. All we do here is make sure that the COPY
	188	* relocation is not in a shared library. They are allowed
	189	* only in executable files.
	190	*/
	191	if (!obj->mainprog) {
	192	_rtld_error("%s: Unexpected R_386_COPY relocation"
	193	" in shared library", obj->path);
	194	goto done;
	195	}
	196	break;
	197
	198	case R_386_GLOB_DAT:
	199	{
	200	const Elf_Sym *def;
	201	const Obj_Entry *defobj;
	202
	203	def = find_symdef(ELF_R_SYM(rel->r_info), obj, &defobj,
35b2b265	204	false, cache, lockstate);
984263bc MD	205	if (def == NULL)
	206	goto done;
	207
	208	*where = (Elf_Addr) (defobj->relocbase + def->st_value);
	209	}
	210	break;
	211
	212	case R_386_RELATIVE:
	213	*where += (Elf_Addr) obj->relocbase;
	214	break;
	215
55b88cae DX	216	case R_386_TLS_TPOFF:
	217	{
	218	const Elf_Sym *def;
	219	const Obj_Entry *defobj;
	220
	221	def = find_symdef(ELF_R_SYM(rel->r_info), obj, &defobj,
35b2b265	222	false, cache, lockstate);
55b88cae DX	223	if (def == NULL)
	224	goto done;
	225
	226	/*
	227	* We lazily allocate offsets for static TLS as we
	228	* see the first relocation that references the
	229	* TLS block. This allows us to support (small
	230	* amounts of) static TLS in dynamically loaded
	231	* modules. If we run out of space, we generate an
	232	* error.
	233	*/
	234	if (!defobj->tls_done) {
	235	if (!allocate_tls_offset((Obj_Entry*) defobj)) {
	236	_rtld_error("%s: No space available for static "
	237	"Thread Local Storage", obj->path);
	238	goto done;
	239	}
	240	}
	241
	242	*where += (Elf_Addr) (def->st_value - defobj->tlsoffset);
	243	}
	244	break;
	245
923439ca JS	246	case R_386_TLS_TPOFF32:
	247	{
	248	const Elf_Sym *def;
	249	const Obj_Entry *defobj;
	250
	251	def = find_symdef(ELF_R_SYM(rel->r_info), obj, &defobj,
	252	false, cache);
	253	if (def == NULL)
	254	goto done;
	255
	256	/*
	257	* We lazily allocate offsets for static TLS as we
	258	* see the first relocation that references the
	259	* TLS block. This allows us to support (small
	260	* amounts of) static TLS in dynamically loaded
	261	* modules. If we run out of space, we generate an
	262	* error.
	263	*/
	264	if (!defobj->tls_done) {
	265	if (!allocate_tls_offset((Obj_Entry*) defobj)) {
	266	_rtld_error("%s: No space available for static "
	267	"Thread Local Storage", obj->path);
	268	goto done;
	269	}
	270	}
	271
	272	*where += (Elf_Addr) (defobj->tlsoffset - def->st_value);
	273	}
	274	break;
	275
55b88cae DX	276	case R_386_TLS_DTPMOD32:
	277	{
	278	const Elf_Sym *def;
	279	const Obj_Entry *defobj;
	280
	281	def = find_symdef(ELF_R_SYM(rel->r_info), obj, &defobj,
35b2b265	282	false, cache, lockstate);
55b88cae DX	283	if (def == NULL)
	284	goto done;
	285
	286	*where += (Elf_Addr) defobj->tlsindex;
	287	}
	288	break;
	289
	290	case R_386_TLS_DTPOFF32:
	291	{
	292	const Elf_Sym *def;
	293	const Obj_Entry *defobj;
	294
	295	def = find_symdef(ELF_R_SYM(rel->r_info), obj, &defobj,
35b2b265	296	false, cache, lockstate);
55b88cae DX	297	if (def == NULL)
	298	goto done;
	299
	300	*where += (Elf_Addr) def->st_value;
	301	}
	302	break;
	303
984263bc MD	304	default:
	305	_rtld_error("%s: Unsupported relocation type %d"
	306	" in non-PLT relocations\n", obj->path,
	307	ELF_R_TYPE(rel->r_info));
	308	goto done;
	309	}
	310	}
	311	r = 0;
	312	done:
fcf53d9b JM	313	if (cache != NULL)
fcf53d9b JM	314	free(cache);
984263bc MD	315	return(r);
	316	}
	317
	318	/* Process the PLT relocations. */
	319	int
	320	reloc_plt(Obj_Entry *obj)
	321	{
	322	const Elf_Rel *rellim;
	323	const Elf_Rel *rel;
	324
f609f035	325	rellim = (const Elf_Rel )((char )obj->pltrel + obj->pltrelsize);
984263bc MD	326	for (rel = obj->pltrel; rel < rellim; rel++) {
	327	Elf_Addr *where;
	328
f609f035 JM	329	switch (ELF_R_TYPE(rel->r_info)) {
	330	case R_386_JMP_SLOT:
	331	/* Relocate the GOT slot pointing into the PLT. */
	332	where = (Elf_Addr *)(obj->relocbase + rel->r_offset);
	333	*where += (Elf_Addr)obj->relocbase;
	334	break;
	335
	336	default:
	337	_rtld_error("Unknown relocation type %x in PLT",
	338	ELF_R_TYPE(rel->r_info));
	339	return (-1);
	340	}
984263bc MD	341	}
	342	return 0;
	343	}
	344
	345	/* Relocate the jump slots in an object. */
	346	int
35b2b265	347	reloc_jmpslots(Obj_Entry obj, RtldLockState lockstate)
984263bc MD	348	{
	349	const Elf_Rel *rellim;
	350	const Elf_Rel *rel;
	351
	352	if (obj->jmpslots_done)
	353	return 0;
35b2b265	354	rellim = (const Elf_Rel )((char )obj->pltrel + obj->pltrelsize);
984263bc	355	for (rel = obj->pltrel; rel < rellim; rel++) {
fcf53d9b	356	Elf_Addr *where, target;
984263bc MD	357	const Elf_Sym *def;
	358	const Obj_Entry *defobj;
	359
f609f035 JM	360	switch (ELF_R_TYPE(rel->r_info)) {
	361	case R_386_JMP_SLOT:
	362	where = (Elf_Addr *)(obj->relocbase + rel->r_offset);
35b2b265 JM	363	def = find_symdef(ELF_R_SYM(rel->r_info), obj, &defobj, true, NULL,
35b2b265 JM	364	lockstate);
f609f035 JM	365	if (def == NULL)
	366	return (-1);
	367	target = (Elf_Addr)(defobj->relocbase + def->st_value);
	368	reloc_jmpslot(where, target, defobj, obj, rel);
	369	break;
	370
	371	default:
	372	_rtld_error("Unknown relocation type %x in PLT",
	373	ELF_R_TYPE(rel->r_info));
	374	return (-1);
	375	}
984263bc	376	}
f609f035	377
984263bc MD	378	obj->jmpslots_done = true;
	379	return 0;
	380	}
55b88cae	381
55b88cae DX	382	/* GNU ABI */
55b88cae DX	383	__attribute__((__regparm__(1)))
bc633d63 MD	384	void *
bc633d63 MD	385	___tls_get_addr(tls_index *ti)
55b88cae	386	{
bc633d63	387	struct tls_tcb *tcb;
55b88cae	388
9e2ee207	389	tcb = tls_get_tcb();
18d39a4f	390	return tls_get_addr_common((Elf_Addr **)&tcb->tcb_dtv, ti->ti_module, ti->ti_offset);
55b88cae DX	391	}
	392
	393	/* Sun ABI */
bc633d63 MD	394	void *
bc633d63 MD	395	__tls_get_addr(tls_index *ti)
55b88cae	396	{
bc633d63	397	struct tls_tcb *tcb;
55b88cae	398
9e2ee207	399	tcb = tls_get_tcb();
18d39a4f	400	return tls_get_addr_common((Elf_Addr **)&tcb->tcb_dtv, ti->ti_module, ti->ti_offset);
55b88cae	401	}
bc633d63	402
a1eee96a MD	403	/* Sun ABI */
	404	void *
	405	__tls_get_addr_tcb(struct tls_tcb tcb, tls_index ti)
	406	{
18d39a4f	407	return tls_get_addr_common((Elf_Addr **)&tcb->tcb_dtv, ti->ti_module, ti->ti_offset);
a1eee96a	408	}