xref: /freebsd/sys/kern/link_elf.c (revision 36716fe2e6eddac7ab1b9e9b1a268885a3985932)
1a4f67738SDoug Rabson /*-
28a36da99SPedro F. Giffuni  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
38a36da99SPedro F. Giffuni  *
4326e27d8SDoug Rabson  * Copyright (c) 1998-2000 Doug Rabson
5a4f67738SDoug Rabson  * All rights reserved.
6a4f67738SDoug Rabson  *
7a4f67738SDoug Rabson  * Redistribution and use in source and binary forms, with or without
8a4f67738SDoug Rabson  * modification, are permitted provided that the following conditions
9a4f67738SDoug Rabson  * are met:
10a4f67738SDoug Rabson  * 1. Redistributions of source code must retain the above copyright
11a4f67738SDoug Rabson  *    notice, this list of conditions and the following disclaimer.
12a4f67738SDoug Rabson  * 2. Redistributions in binary form must reproduce the above copyright
13a4f67738SDoug Rabson  *    notice, this list of conditions and the following disclaimer in the
14a4f67738SDoug Rabson  *    documentation and/or other materials provided with the distribution.
15a4f67738SDoug Rabson  *
16a4f67738SDoug Rabson  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17a4f67738SDoug Rabson  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18a4f67738SDoug Rabson  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19a4f67738SDoug Rabson  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20a4f67738SDoug Rabson  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21a4f67738SDoug Rabson  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22a4f67738SDoug Rabson  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23a4f67738SDoug Rabson  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24a4f67738SDoug Rabson  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25a4f67738SDoug Rabson  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26a4f67738SDoug Rabson  * SUCH DAMAGE.
27a4f67738SDoug Rabson  */
28a4f67738SDoug Rabson 
29677b542eSDavid E. O'Brien #include <sys/cdefs.h>
30677b542eSDavid E. O'Brien __FBSDID("$FreeBSD$");
31677b542eSDavid E. O'Brien 
32a2024a3eSJohn Birrell #include "opt_ddb.h"
33ecb01c64SMarcel Moolenaar #include "opt_gdb.h"
34326e27d8SDoug Rabson 
35a4f67738SDoug Rabson #include <sys/param.h>
36a4f67738SDoug Rabson #include <sys/systm.h>
375ad6c3b1SBruce Evans #ifdef GPROF
385ad6c3b1SBruce Evans #include <sys/gmon.h>
395ad6c3b1SBruce Evans #endif
40fb919e4dSMark Murray #include <sys/kernel.h>
41fb919e4dSMark Murray #include <sys/lock.h>
42a4f67738SDoug Rabson #include <sys/malloc.h>
43c0b824f9SDima Dorfman #include <sys/mutex.h>
4462d615d5SJohn Baldwin #include <sys/mount.h>
4550c202c5SJeff Roberson #include <sys/pcpu.h>
46a4f67738SDoug Rabson #include <sys/proc.h>
47a4f67738SDoug Rabson #include <sys/namei.h>
48a4f67738SDoug Rabson #include <sys/fcntl.h>
49a4f67738SDoug Rabson #include <sys/vnode.h>
50a4f67738SDoug Rabson #include <sys/linker.h>
51fb919e4dSMark Murray 
52a4f67738SDoug Rabson #include <machine/elf.h>
53a4f67738SDoug Rabson 
54eddfbb76SRobert Watson #include <net/vnet.h>
55eddfbb76SRobert Watson 
56aed55708SRobert Watson #include <security/mac/mac_framework.h>
57aed55708SRobert Watson 
58fe3db7c7SDoug Rabson #include <vm/vm.h>
59fe3db7c7SDoug Rabson #include <vm/vm_param.h>
60d1f088daSPeter Wemm #ifdef SPARSE_MAPPING
61fe3db7c7SDoug Rabson #include <vm/vm_object.h>
62fe3db7c7SDoug Rabson #include <vm/vm_kern.h>
63fe3db7c7SDoug Rabson #include <vm/vm_extern.h>
64d1f088daSPeter Wemm #endif
65fe3db7c7SDoug Rabson #include <vm/pmap.h>
66fe3db7c7SDoug Rabson #include <vm/vm_map.h>
67fb919e4dSMark Murray 
68f9980387SPeter Wemm #include <sys/link_elf.h>
69fe3db7c7SDoug Rabson 
70a2024a3eSJohn Birrell #ifdef DDB_CTF
71d9db5225SCraig Rodrigues #include <sys/zlib.h>
72a2024a3eSJohn Birrell #endif
73a2024a3eSJohn Birrell 
74326e27d8SDoug Rabson #include "linker_if.h"
75a4f67738SDoug Rabson 
761a330eb0SPeter Wemm #define MAXSEGS 4
771a330eb0SPeter Wemm 
784f2945f8SDavid E. O'Brien typedef struct elf_file {
794f2945f8SDavid E. O'Brien 	struct linker_file lf;		/* Common fields */
804f2945f8SDavid E. O'Brien 	int		preloaded;	/* Was file pre-loaded */
814f2945f8SDavid E. O'Brien 	caddr_t		address;	/* Relocation address */
824f2945f8SDavid E. O'Brien #ifdef SPARSE_MAPPING
834f2945f8SDavid E. O'Brien 	vm_object_t	object;		/* VM object to hold file pages */
844f2945f8SDavid E. O'Brien #endif
854f2945f8SDavid E. O'Brien 	Elf_Dyn		*dynamic;	/* Symbol table etc. */
864f2945f8SDavid E. O'Brien 	Elf_Hashelt	nbuckets;	/* DT_HASH info */
874f2945f8SDavid E. O'Brien 	Elf_Hashelt	nchains;
884f2945f8SDavid E. O'Brien 	const Elf_Hashelt *buckets;
894f2945f8SDavid E. O'Brien 	const Elf_Hashelt *chains;
904f2945f8SDavid E. O'Brien 	caddr_t		hash;
914f2945f8SDavid E. O'Brien 	caddr_t		strtab;		/* DT_STRTAB */
924f2945f8SDavid E. O'Brien 	int		strsz;		/* DT_STRSZ */
934f2945f8SDavid E. O'Brien 	const Elf_Sym	*symtab;		/* DT_SYMTAB */
944f2945f8SDavid E. O'Brien 	Elf_Addr	*got;		/* DT_PLTGOT */
954f2945f8SDavid E. O'Brien 	const Elf_Rel	*pltrel;	/* DT_JMPREL */
964f2945f8SDavid E. O'Brien 	int		pltrelsize;	/* DT_PLTRELSZ */
974f2945f8SDavid E. O'Brien 	const Elf_Rela	*pltrela;	/* DT_JMPREL */
984f2945f8SDavid E. O'Brien 	int		pltrelasize;	/* DT_PLTRELSZ */
994f2945f8SDavid E. O'Brien 	const Elf_Rel	*rel;		/* DT_REL */
1004f2945f8SDavid E. O'Brien 	int		relsize;	/* DT_RELSZ */
1014f2945f8SDavid E. O'Brien 	const Elf_Rela	*rela;		/* DT_RELA */
1024f2945f8SDavid E. O'Brien 	int		relasize;	/* DT_RELASZ */
1034f2945f8SDavid E. O'Brien 	caddr_t		modptr;
1044f2945f8SDavid E. O'Brien 	const Elf_Sym	*ddbsymtab;	/* The symbol table we are using */
1054f2945f8SDavid E. O'Brien 	long		ddbsymcnt;	/* Number of symbols */
1064f2945f8SDavid E. O'Brien 	caddr_t		ddbstrtab;	/* String table */
1074f2945f8SDavid E. O'Brien 	long		ddbstrcnt;	/* number of bytes in string table */
1084f2945f8SDavid E. O'Brien 	caddr_t		symbase;	/* malloc'ed symbold base */
1094f2945f8SDavid E. O'Brien 	caddr_t		strbase;	/* malloc'ed string base */
1104f2945f8SDavid E. O'Brien 	caddr_t		ctftab;		/* CTF table */
1114f2945f8SDavid E. O'Brien 	long		ctfcnt;		/* number of bytes in CTF table */
1124f2945f8SDavid E. O'Brien 	caddr_t		ctfoff;		/* CTF offset table */
1134f2945f8SDavid E. O'Brien 	caddr_t		typoff;		/* Type offset table */
1144f2945f8SDavid E. O'Brien 	long		typlen;		/* Number of type entries. */
11550c202c5SJeff Roberson 	Elf_Addr	pcpu_start;	/* Pre-relocation pcpu set start. */
11650c202c5SJeff Roberson 	Elf_Addr	pcpu_stop;	/* Pre-relocation pcpu set stop. */
11750c202c5SJeff Roberson 	Elf_Addr	pcpu_base;	/* Relocated pcpu set address. */
118eddfbb76SRobert Watson #ifdef VIMAGE
119eddfbb76SRobert Watson 	Elf_Addr	vnet_start;	/* Pre-relocation vnet set start. */
120eddfbb76SRobert Watson 	Elf_Addr	vnet_stop;	/* Pre-relocation vnet set stop. */
121eddfbb76SRobert Watson 	Elf_Addr	vnet_base;	/* Relocated vnet set address. */
122eddfbb76SRobert Watson #endif
1234f2945f8SDavid E. O'Brien #ifdef GDB
1244f2945f8SDavid E. O'Brien 	struct link_map	gdb;		/* hooks for gdb */
1254f2945f8SDavid E. O'Brien #endif
1264f2945f8SDavid E. O'Brien } *elf_file_t;
1274f2945f8SDavid E. O'Brien 
12847813f5dSMikolaj Golub struct elf_set {
12947813f5dSMikolaj Golub 	Elf_Addr	es_start;
13047813f5dSMikolaj Golub 	Elf_Addr	es_stop;
13147813f5dSMikolaj Golub 	Elf_Addr	es_base;
13247813f5dSMikolaj Golub 	TAILQ_ENTRY(elf_set)	es_link;
13347813f5dSMikolaj Golub };
13447813f5dSMikolaj Golub 
13547813f5dSMikolaj Golub TAILQ_HEAD(elf_set_head, elf_set);
13647813f5dSMikolaj Golub 
137a2024a3eSJohn Birrell #include <kern/kern_ctf.c>
138a2024a3eSJohn Birrell 
139c143d6c2SMarcel Moolenaar static int	link_elf_link_common_finish(linker_file_t);
14054823af2SPeter Wemm static int	link_elf_link_preload(linker_class_t cls,
141326e27d8SDoug Rabson 				      const char *, linker_file_t *);
14254823af2SPeter Wemm static int	link_elf_link_preload_finish(linker_file_t);
1432f22b3ffSMatthew D Fleming static int	link_elf_load_file(linker_class_t, const char *,
1442f22b3ffSMatthew D Fleming 		    linker_file_t *);
145326e27d8SDoug Rabson static int	link_elf_lookup_symbol(linker_file_t, const char *,
146326e27d8SDoug Rabson 		    c_linker_sym_t *);
1472f22b3ffSMatthew D Fleming static int	link_elf_symbol_values(linker_file_t, c_linker_sym_t,
1482f22b3ffSMatthew D Fleming 		    linker_symval_t *);
1492f22b3ffSMatthew D Fleming static int	link_elf_search_symbol(linker_file_t, caddr_t,
1502f22b3ffSMatthew D Fleming 		    c_linker_sym_t *, long *);
151326e27d8SDoug Rabson 
152326e27d8SDoug Rabson static void	link_elf_unload_file(linker_file_t);
15354823af2SPeter Wemm static void	link_elf_unload_preload(linker_file_t);
154f41325dbSPeter Wemm static int	link_elf_lookup_set(linker_file_t, const char *,
155f41325dbSPeter Wemm 		    void ***, void ***, int *);
156bb9fe9ddSBrian Feldman static int	link_elf_each_function_name(linker_file_t,
1572f22b3ffSMatthew D Fleming 		    int (*)(const char *, void *), void *);
158a2024a3eSJohn Birrell static int	link_elf_each_function_nameval(linker_file_t,
1592f22b3ffSMatthew D Fleming 		    linker_function_nameval_callback_t, void *);
1607251b4bfSJake Burkholder static void	link_elf_reloc_local(linker_file_t);
16100a5db46SStacey Son static long	link_elf_symtab_get(linker_file_t, const Elf_Sym **);
16200a5db46SStacey Son static long	link_elf_strtab_get(linker_file_t, caddr_t *);
163cff8c6f2SKonstantin Belousov static int	elf_lookup(linker_file_t, Elf_Size, int, Elf_Addr *);
164326e27d8SDoug Rabson 
165326e27d8SDoug Rabson static kobj_method_t link_elf_methods[] = {
166326e27d8SDoug Rabson 	KOBJMETHOD(linker_lookup_symbol,	link_elf_lookup_symbol),
167326e27d8SDoug Rabson 	KOBJMETHOD(linker_symbol_values,	link_elf_symbol_values),
168326e27d8SDoug Rabson 	KOBJMETHOD(linker_search_symbol,	link_elf_search_symbol),
169326e27d8SDoug Rabson 	KOBJMETHOD(linker_unload,		link_elf_unload_file),
17054823af2SPeter Wemm 	KOBJMETHOD(linker_load_file,		link_elf_load_file),
17154823af2SPeter Wemm 	KOBJMETHOD(linker_link_preload,		link_elf_link_preload),
17254823af2SPeter Wemm 	KOBJMETHOD(linker_link_preload_finish,	link_elf_link_preload_finish),
173f41325dbSPeter Wemm 	KOBJMETHOD(linker_lookup_set,		link_elf_lookup_set),
174bb9fe9ddSBrian Feldman 	KOBJMETHOD(linker_each_function_name,	link_elf_each_function_name),
175a2024a3eSJohn Birrell 	KOBJMETHOD(linker_each_function_nameval, link_elf_each_function_nameval),
176a2024a3eSJohn Birrell 	KOBJMETHOD(linker_ctf_get,		link_elf_ctf_get),
17700a5db46SStacey Son 	KOBJMETHOD(linker_symtab_get,		link_elf_symtab_get),
17800a5db46SStacey Son 	KOBJMETHOD(linker_strtab_get,		link_elf_strtab_get),
179326e27d8SDoug Rabson 	{ 0, 0 }
180326e27d8SDoug Rabson };
181326e27d8SDoug Rabson 
182326e27d8SDoug Rabson static struct linker_class link_elf_class = {
183326e27d8SDoug Rabson #if ELF_TARG_CLASS == ELFCLASS32
184326e27d8SDoug Rabson 	"elf32",
185326e27d8SDoug Rabson #else
186326e27d8SDoug Rabson 	"elf64",
187326e27d8SDoug Rabson #endif
188326e27d8SDoug Rabson 	link_elf_methods, sizeof(struct elf_file)
189326e27d8SDoug Rabson };
190326e27d8SDoug Rabson 
191*36716fe2SMark Johnston typedef int (*elf_reloc_fn)(linker_file_t lf, Elf_Addr relocbase,
192*36716fe2SMark Johnston     const void *data, int type, elf_lookup_fn lookup);
193*36716fe2SMark Johnston 
1942f22b3ffSMatthew D Fleming static int	parse_dynamic(elf_file_t);
1952f22b3ffSMatthew D Fleming static int	relocate_file(elf_file_t);
196*36716fe2SMark Johnston static int	relocate_file1(elf_file_t ef, elf_lookup_fn lookup,
197*36716fe2SMark Johnston 		    elf_reloc_fn reloc, bool ifuncs);
1982f22b3ffSMatthew D Fleming static int	link_elf_preload_parse_symbols(elf_file_t);
199326e27d8SDoug Rabson 
20047813f5dSMikolaj Golub static struct elf_set_head set_pcpu_list;
20147813f5dSMikolaj Golub #ifdef VIMAGE
20247813f5dSMikolaj Golub static struct elf_set_head set_vnet_list;
20347813f5dSMikolaj Golub #endif
20447813f5dSMikolaj Golub 
20547813f5dSMikolaj Golub static void
20647813f5dSMikolaj Golub elf_set_add(struct elf_set_head *list, Elf_Addr start, Elf_Addr stop, Elf_Addr base)
20747813f5dSMikolaj Golub {
20847813f5dSMikolaj Golub 	struct elf_set *set, *iter;
20947813f5dSMikolaj Golub 
21047813f5dSMikolaj Golub 	set = malloc(sizeof(*set), M_LINKER, M_WAITOK);
21147813f5dSMikolaj Golub 	set->es_start = start;
21247813f5dSMikolaj Golub 	set->es_stop = stop;
21347813f5dSMikolaj Golub 	set->es_base = base;
21447813f5dSMikolaj Golub 
21547813f5dSMikolaj Golub 	TAILQ_FOREACH(iter, list, es_link) {
21647813f5dSMikolaj Golub 
21747813f5dSMikolaj Golub 		KASSERT((set->es_start < iter->es_start && set->es_stop < iter->es_stop) ||
21847813f5dSMikolaj Golub 		    (set->es_start > iter->es_start && set->es_stop > iter->es_stop),
21947813f5dSMikolaj Golub 		    ("linker sets intersection: to insert: 0x%jx-0x%jx; inserted: 0x%jx-0x%jx",
22047813f5dSMikolaj Golub 		    (uintmax_t)set->es_start, (uintmax_t)set->es_stop,
22147813f5dSMikolaj Golub 		    (uintmax_t)iter->es_start, (uintmax_t)iter->es_stop));
22247813f5dSMikolaj Golub 
22347813f5dSMikolaj Golub 		if (iter->es_start > set->es_start) {
22447813f5dSMikolaj Golub 			TAILQ_INSERT_BEFORE(iter, set, es_link);
22547813f5dSMikolaj Golub 			break;
22647813f5dSMikolaj Golub 		}
22747813f5dSMikolaj Golub 	}
22847813f5dSMikolaj Golub 
22947813f5dSMikolaj Golub 	if (iter == NULL)
23047813f5dSMikolaj Golub 		TAILQ_INSERT_TAIL(list, set, es_link);
23147813f5dSMikolaj Golub }
23247813f5dSMikolaj Golub 
23347813f5dSMikolaj Golub static int
23447813f5dSMikolaj Golub elf_set_find(struct elf_set_head *list, Elf_Addr addr, Elf_Addr *start, Elf_Addr *base)
23547813f5dSMikolaj Golub {
23647813f5dSMikolaj Golub 	struct elf_set *set;
23747813f5dSMikolaj Golub 
23847813f5dSMikolaj Golub 	TAILQ_FOREACH(set, list, es_link) {
23947813f5dSMikolaj Golub 		if (addr < set->es_start)
24047813f5dSMikolaj Golub 			return (0);
24147813f5dSMikolaj Golub 		if (addr < set->es_stop) {
24247813f5dSMikolaj Golub 			*start = set->es_start;
24347813f5dSMikolaj Golub 			*base = set->es_base;
24447813f5dSMikolaj Golub 			return (1);
24547813f5dSMikolaj Golub 		}
24647813f5dSMikolaj Golub 	}
24747813f5dSMikolaj Golub 
24847813f5dSMikolaj Golub 	return (0);
24947813f5dSMikolaj Golub }
25047813f5dSMikolaj Golub 
25147813f5dSMikolaj Golub static void
25247813f5dSMikolaj Golub elf_set_delete(struct elf_set_head *list, Elf_Addr start)
25347813f5dSMikolaj Golub {
25447813f5dSMikolaj Golub 	struct elf_set *set;
25547813f5dSMikolaj Golub 
25647813f5dSMikolaj Golub 	TAILQ_FOREACH(set, list, es_link) {
25747813f5dSMikolaj Golub 		if (start < set->es_start)
25847813f5dSMikolaj Golub 			break;
25947813f5dSMikolaj Golub 		if (start == set->es_start) {
26047813f5dSMikolaj Golub 			TAILQ_REMOVE(list, set, es_link);
26147813f5dSMikolaj Golub 			free(set, M_LINKER);
26247813f5dSMikolaj Golub 			return;
26347813f5dSMikolaj Golub 		}
26447813f5dSMikolaj Golub 	}
26547813f5dSMikolaj Golub 	KASSERT(0, ("deleting unknown linker set (start = 0x%jx)",
26647813f5dSMikolaj Golub 	    (uintmax_t)start));
26747813f5dSMikolaj Golub }
26847813f5dSMikolaj Golub 
269ecb01c64SMarcel Moolenaar #ifdef GDB
2702f22b3ffSMatthew D Fleming static void	r_debug_state(struct r_debug *, struct link_map *);
271326e27d8SDoug Rabson 
272326e27d8SDoug Rabson /*
273326e27d8SDoug Rabson  * A list of loaded modules for GDB to use for loading symbols.
274326e27d8SDoug Rabson  */
275326e27d8SDoug Rabson struct r_debug r_debug;
276326e27d8SDoug Rabson 
2772f22b3ffSMatthew D Fleming #define GDB_STATE(s) do {				\
2782f22b3ffSMatthew D Fleming 	r_debug.r_state = s; r_debug_state(NULL, NULL);	\
2792f22b3ffSMatthew D Fleming } while (0)
280326e27d8SDoug Rabson 
281326e27d8SDoug Rabson /*
282326e27d8SDoug Rabson  * Function for the debugger to set a breakpoint on to gain control.
283326e27d8SDoug Rabson  */
28437c84183SPoul-Henning Kamp static void
285ca29467eSJohn Baldwin r_debug_state(struct r_debug *dummy_one __unused,
286ca29467eSJohn Baldwin 	      struct link_map *dummy_two __unused)
287326e27d8SDoug Rabson {
288326e27d8SDoug Rabson }
289326e27d8SDoug Rabson 
2901720979bSMarcel Moolenaar static void
2911720979bSMarcel Moolenaar link_elf_add_gdb(struct link_map *l)
2921720979bSMarcel Moolenaar {
2931720979bSMarcel Moolenaar 	struct link_map *prev;
2941720979bSMarcel Moolenaar 
295c143d6c2SMarcel Moolenaar 	l->l_next = NULL;
296c143d6c2SMarcel Moolenaar 
297c143d6c2SMarcel Moolenaar 	if (r_debug.r_map == NULL) {
298c143d6c2SMarcel Moolenaar 		/* Add first. */
299c143d6c2SMarcel Moolenaar 		l->l_prev = NULL;
300c143d6c2SMarcel Moolenaar 		r_debug.r_map = l;
301c143d6c2SMarcel Moolenaar 	} else {
302c143d6c2SMarcel Moolenaar 		/* Append to list. */
3032f22b3ffSMatthew D Fleming 		for (prev = r_debug.r_map;
3042f22b3ffSMatthew D Fleming 		    prev->l_next != NULL;
3052f22b3ffSMatthew D Fleming 		    prev = prev->l_next)
3061720979bSMarcel Moolenaar 			;
3071720979bSMarcel Moolenaar 		l->l_prev = prev;
3081720979bSMarcel Moolenaar 		prev->l_next = l;
3091720979bSMarcel Moolenaar 	}
310c143d6c2SMarcel Moolenaar }
3111720979bSMarcel Moolenaar 
3121720979bSMarcel Moolenaar static void
3131720979bSMarcel Moolenaar link_elf_delete_gdb(struct link_map *l)
3141720979bSMarcel Moolenaar {
3151720979bSMarcel Moolenaar 	if (l->l_prev == NULL) {
316c143d6c2SMarcel Moolenaar 		/* Remove first. */
3171720979bSMarcel Moolenaar 		if ((r_debug.r_map = l->l_next) != NULL)
3181720979bSMarcel Moolenaar 			l->l_next->l_prev = NULL;
319c143d6c2SMarcel Moolenaar 	} else {
320c143d6c2SMarcel Moolenaar 		/* Remove any but first. */
3211720979bSMarcel Moolenaar 		if ((l->l_prev->l_next = l->l_next) != NULL)
3221720979bSMarcel Moolenaar 			l->l_next->l_prev = l->l_prev;
3231720979bSMarcel Moolenaar 	}
324c143d6c2SMarcel Moolenaar }
325ecb01c64SMarcel Moolenaar #endif /* GDB */
326a4f67738SDoug Rabson 
3274f2945f8SDavid E. O'Brien /*
3284f2945f8SDavid E. O'Brien  * The kernel symbol table starts here.
3294f2945f8SDavid E. O'Brien  */
3304f2945f8SDavid E. O'Brien extern struct _dynamic _DYNAMIC;
3314f2945f8SDavid E. O'Brien 
332a4f67738SDoug Rabson static void
333552f9f63SEdwin Groothuis link_elf_error(const char *filename, const char *s)
3341720979bSMarcel Moolenaar {
335552f9f63SEdwin Groothuis 	if (filename == NULL)
3361720979bSMarcel Moolenaar 		printf("kldload: %s\n", s);
337552f9f63SEdwin Groothuis 	else
338552f9f63SEdwin Groothuis 		printf("kldload: %s: %s\n", filename, s);
3391720979bSMarcel Moolenaar }
3401720979bSMarcel Moolenaar 
3410067051fSMarcel Moolenaar static void
3420067051fSMarcel Moolenaar link_elf_invoke_ctors(caddr_t addr, size_t size)
3430067051fSMarcel Moolenaar {
3440067051fSMarcel Moolenaar 	void (**ctor)(void);
3450067051fSMarcel Moolenaar 	size_t i, cnt;
3460067051fSMarcel Moolenaar 
3470067051fSMarcel Moolenaar 	if (addr == NULL || size == 0)
3480067051fSMarcel Moolenaar 		return;
3490067051fSMarcel Moolenaar 	cnt = size / sizeof(*ctor);
3500067051fSMarcel Moolenaar 	ctor = (void *)addr;
3510067051fSMarcel Moolenaar 	for (i = 0; i < cnt; i++) {
3520067051fSMarcel Moolenaar 		if (ctor[i] != NULL)
3530067051fSMarcel Moolenaar 			(*ctor[i])();
3540067051fSMarcel Moolenaar 	}
3550067051fSMarcel Moolenaar }
3560067051fSMarcel Moolenaar 
357c143d6c2SMarcel Moolenaar /*
358c143d6c2SMarcel Moolenaar  * Actions performed after linking/loading both the preloaded kernel and any
359c143d6c2SMarcel Moolenaar  * modules; whether preloaded or dynamicly loaded.
360c143d6c2SMarcel Moolenaar  */
361c143d6c2SMarcel Moolenaar static int
362c143d6c2SMarcel Moolenaar link_elf_link_common_finish(linker_file_t lf)
363c143d6c2SMarcel Moolenaar {
364ecb01c64SMarcel Moolenaar #ifdef GDB
365c143d6c2SMarcel Moolenaar 	elf_file_t ef = (elf_file_t)lf;
366c143d6c2SMarcel Moolenaar 	char *newfilename;
367c143d6c2SMarcel Moolenaar #endif
3681aeb23cdSMarcel Moolenaar 	int error;
3691aeb23cdSMarcel Moolenaar 
3701aeb23cdSMarcel Moolenaar 	/* Notify MD code that a module is being loaded. */
3711aeb23cdSMarcel Moolenaar 	error = elf_cpu_load_file(lf);
3722f22b3ffSMatthew D Fleming 	if (error != 0)
3731aeb23cdSMarcel Moolenaar 		return (error);
374c143d6c2SMarcel Moolenaar 
375ecb01c64SMarcel Moolenaar #ifdef GDB
376c143d6c2SMarcel Moolenaar 	GDB_STATE(RT_ADD);
377c143d6c2SMarcel Moolenaar 	ef->gdb.l_addr = lf->address;
378a163d034SWarner Losh 	newfilename = malloc(strlen(lf->filename) + 1, M_LINKER, M_WAITOK);
379c143d6c2SMarcel Moolenaar 	strcpy(newfilename, lf->filename);
380c143d6c2SMarcel Moolenaar 	ef->gdb.l_name = newfilename;
381c143d6c2SMarcel Moolenaar 	ef->gdb.l_ld = ef->dynamic;
382c143d6c2SMarcel Moolenaar 	link_elf_add_gdb(&ef->gdb);
383c143d6c2SMarcel Moolenaar 	GDB_STATE(RT_CONSISTENT);
384c143d6c2SMarcel Moolenaar #endif
385c143d6c2SMarcel Moolenaar 
3860067051fSMarcel Moolenaar 	/* Invoke .ctors */
3870067051fSMarcel Moolenaar 	link_elf_invoke_ctors(lf->ctors_addr, lf->ctors_size);
388c143d6c2SMarcel Moolenaar 	return (0);
389c143d6c2SMarcel Moolenaar }
390c143d6c2SMarcel Moolenaar 
391ee900504SNathan Whitehorn extern vm_offset_t __startkernel, __endkernel;
392c6014c73SNathan Whitehorn 
3931720979bSMarcel Moolenaar static void
394a4f67738SDoug Rabson link_elf_init(void* arg)
395a4f67738SDoug Rabson {
396de78ca7eSPeter Wemm 	Elf_Dyn *dp;
3970067051fSMarcel Moolenaar 	Elf_Addr *ctors_addrp;
3980067051fSMarcel Moolenaar 	Elf_Size *ctors_sizep;
399de78ca7eSPeter Wemm 	caddr_t modptr, baseptr, sizeptr;
400de78ca7eSPeter Wemm 	elf_file_t ef;
401de78ca7eSPeter Wemm 	char *modname;
402a4f67738SDoug Rabson 
403326e27d8SDoug Rabson 	linker_add_class(&link_elf_class);
404a4f67738SDoug Rabson 
405de78ca7eSPeter Wemm 	dp = (Elf_Dyn *)&_DYNAMIC;
406de78ca7eSPeter Wemm 	modname = NULL;
40767db8b23SPeter Wemm 	modptr = preload_search_by_type("elf" __XSTRING(__ELF_WORD_SIZE) " kernel");
40867db8b23SPeter Wemm 	if (modptr == NULL)
409de78ca7eSPeter Wemm 		modptr = preload_search_by_type("elf kernel");
410de78ca7eSPeter Wemm 	modname = (char *)preload_search_info(modptr, MODINFO_NAME);
411de78ca7eSPeter Wemm 	if (modname == NULL)
412de78ca7eSPeter Wemm 		modname = "kernel";
413326e27d8SDoug Rabson 	linker_kernel_file = linker_make_file(modname, &link_elf_class);
414a4f67738SDoug Rabson 	if (linker_kernel_file == NULL)
4152f22b3ffSMatthew D Fleming 		panic("%s: Can't create linker structures for kernel",
4162f22b3ffSMatthew D Fleming 		    __func__);
417326e27d8SDoug Rabson 
418326e27d8SDoug Rabson 	ef = (elf_file_t) linker_kernel_file;
41954823af2SPeter Wemm 	ef->preloaded = 1;
4205c845fdeSNathan Whitehorn #ifdef __powerpc__
421c6014c73SNathan Whitehorn 	ef->address = (caddr_t) (__startkernel - KERNBASE);
422c6014c73SNathan Whitehorn #else
423326e27d8SDoug Rabson 	ef->address = 0;
424c6014c73SNathan Whitehorn #endif
425326e27d8SDoug Rabson #ifdef SPARSE_MAPPING
426326e27d8SDoug Rabson 	ef->object = 0;
427326e27d8SDoug Rabson #endif
428326e27d8SDoug Rabson 	ef->dynamic = dp;
429326e27d8SDoug Rabson 
4302f22b3ffSMatthew D Fleming 	if (dp != NULL)
431326e27d8SDoug Rabson 		parse_dynamic(ef);
432ee900504SNathan Whitehorn #ifdef __powerpc__
433ee900504SNathan Whitehorn 	linker_kernel_file->address = (caddr_t)__startkernel;
434ee900504SNathan Whitehorn 	linker_kernel_file->size = (intptr_t)(__endkernel - __startkernel);
435ee900504SNathan Whitehorn #else
436c6014c73SNathan Whitehorn 	linker_kernel_file->address += KERNBASE;
437d009ccfaSBruce Evans 	linker_kernel_file->size = -(intptr_t)linker_kernel_file->address;
438ee900504SNathan Whitehorn #endif
439de78ca7eSPeter Wemm 
4402f22b3ffSMatthew D Fleming 	if (modptr != NULL) {
4412d636ab0SPeter Wemm 		ef->modptr = modptr;
442de78ca7eSPeter Wemm 		baseptr = preload_search_info(modptr, MODINFO_ADDR);
4432f22b3ffSMatthew D Fleming 		if (baseptr != NULL)
444de78ca7eSPeter Wemm 			linker_kernel_file->address = *(caddr_t *)baseptr;
445de78ca7eSPeter Wemm 		sizeptr = preload_search_info(modptr, MODINFO_SIZE);
4462f22b3ffSMatthew D Fleming 		if (sizeptr != NULL)
447de78ca7eSPeter Wemm 			linker_kernel_file->size = *(size_t *)sizeptr;
4480067051fSMarcel Moolenaar 		ctors_addrp = (Elf_Addr *)preload_search_info(modptr,
4490067051fSMarcel Moolenaar 			MODINFO_METADATA | MODINFOMD_CTORS_ADDR);
4500067051fSMarcel Moolenaar 		ctors_sizep = (Elf_Size *)preload_search_info(modptr,
4510067051fSMarcel Moolenaar 			MODINFO_METADATA | MODINFOMD_CTORS_SIZE);
4520067051fSMarcel Moolenaar 		if (ctors_addrp != NULL && ctors_sizep != NULL) {
453853a17adSEnji Cooper 			linker_kernel_file->ctors_addr = ef->address +
4540067051fSMarcel Moolenaar 			    *ctors_addrp;
4550067051fSMarcel Moolenaar 			linker_kernel_file->ctors_size = *ctors_sizep;
4560067051fSMarcel Moolenaar 		}
457de78ca7eSPeter Wemm 	}
45854823af2SPeter Wemm 	(void)link_elf_preload_parse_symbols(ef);
459326e27d8SDoug Rabson 
460ecb01c64SMarcel Moolenaar #ifdef GDB
461c143d6c2SMarcel Moolenaar 	r_debug.r_map = NULL;
462326e27d8SDoug Rabson 	r_debug.r_brk = r_debug_state;
463326e27d8SDoug Rabson 	r_debug.r_state = RT_CONSISTENT;
464326e27d8SDoug Rabson #endif
465c143d6c2SMarcel Moolenaar 
466c143d6c2SMarcel Moolenaar 	(void)link_elf_link_common_finish(linker_kernel_file);
46759800afcSJohn Baldwin 	linker_kernel_file->flags |= LINKER_FILE_LINKED;
46847813f5dSMikolaj Golub 	TAILQ_INIT(&set_pcpu_list);
46947813f5dSMikolaj Golub #ifdef VIMAGE
47047813f5dSMikolaj Golub 	TAILQ_INIT(&set_vnet_list);
47147813f5dSMikolaj Golub #endif
472a4f67738SDoug Rabson }
473a4f67738SDoug Rabson 
474891cf3edSEd Maste SYSINIT(link_elf, SI_SUB_KLD, SI_ORDER_THIRD, link_elf_init, NULL);
475a4f67738SDoug Rabson 
476a4f67738SDoug Rabson static int
47754823af2SPeter Wemm link_elf_preload_parse_symbols(elf_file_t ef)
4782d636ab0SPeter Wemm {
4792d636ab0SPeter Wemm 	caddr_t pointer;
4802d636ab0SPeter Wemm 	caddr_t ssym, esym, base;
4812d636ab0SPeter Wemm 	caddr_t strtab;
4822d636ab0SPeter Wemm 	int strcnt;
4832d636ab0SPeter Wemm 	Elf_Sym *symtab;
4842d636ab0SPeter Wemm 	int symcnt;
4852d636ab0SPeter Wemm 
486ca65d5c7SPeter Wemm 	if (ef->modptr == NULL)
4872f22b3ffSMatthew D Fleming 		return (0);
4882f22b3ffSMatthew D Fleming 	pointer = preload_search_info(ef->modptr,
4892f22b3ffSMatthew D Fleming 	    MODINFO_METADATA | MODINFOMD_SSYM);
4902d636ab0SPeter Wemm 	if (pointer == NULL)
4912f22b3ffSMatthew D Fleming 		return (0);
4922d636ab0SPeter Wemm 	ssym = *(caddr_t *)pointer;
4932f22b3ffSMatthew D Fleming 	pointer = preload_search_info(ef->modptr,
4942f22b3ffSMatthew D Fleming 	    MODINFO_METADATA | MODINFOMD_ESYM);
4952d636ab0SPeter Wemm 	if (pointer == NULL)
4962f22b3ffSMatthew D Fleming 		return (0);
4972d636ab0SPeter Wemm 	esym = *(caddr_t *)pointer;
4982d636ab0SPeter Wemm 
4992d636ab0SPeter Wemm 	base = ssym;
5002d636ab0SPeter Wemm 
5012d636ab0SPeter Wemm 	symcnt = *(long *)base;
5022d636ab0SPeter Wemm 	base += sizeof(long);
5032d636ab0SPeter Wemm 	symtab = (Elf_Sym *)base;
5042d636ab0SPeter Wemm 	base += roundup(symcnt, sizeof(long));
5052d636ab0SPeter Wemm 
5062d636ab0SPeter Wemm 	if (base > esym || base < ssym) {
5072d636ab0SPeter Wemm 		printf("Symbols are corrupt!\n");
5082f22b3ffSMatthew D Fleming 		return (EINVAL);
5092d636ab0SPeter Wemm 	}
5102d636ab0SPeter Wemm 
5112d636ab0SPeter Wemm 	strcnt = *(long *)base;
5122d636ab0SPeter Wemm 	base += sizeof(long);
5132d636ab0SPeter Wemm 	strtab = base;
5142d636ab0SPeter Wemm 	base += roundup(strcnt, sizeof(long));
5152d636ab0SPeter Wemm 
5162d636ab0SPeter Wemm 	if (base > esym || base < ssym) {
5172d636ab0SPeter Wemm 		printf("Symbols are corrupt!\n");
5182f22b3ffSMatthew D Fleming 		return (EINVAL);
5192d636ab0SPeter Wemm 	}
5202d636ab0SPeter Wemm 
5212d636ab0SPeter Wemm 	ef->ddbsymtab = symtab;
5222d636ab0SPeter Wemm 	ef->ddbsymcnt = symcnt / sizeof(Elf_Sym);
5232d636ab0SPeter Wemm 	ef->ddbstrtab = strtab;
5242d636ab0SPeter Wemm 	ef->ddbstrcnt = strcnt;
5252d636ab0SPeter Wemm 
5262f22b3ffSMatthew D Fleming 	return (0);
5272d636ab0SPeter Wemm }
5282d636ab0SPeter Wemm 
5292d636ab0SPeter Wemm static int
530326e27d8SDoug Rabson parse_dynamic(elf_file_t ef)
531a4f67738SDoug Rabson {
532326e27d8SDoug Rabson 	Elf_Dyn *dp;
533fe3db7c7SDoug Rabson 	int plttype = DT_REL;
534a4f67738SDoug Rabson 
535a4f67738SDoug Rabson 	for (dp = ef->dynamic; dp->d_tag != DT_NULL; dp++) {
536a4f67738SDoug Rabson 		switch (dp->d_tag) {
537a4f67738SDoug Rabson 		case DT_HASH:
538a4f67738SDoug Rabson 		{
539a4f67738SDoug Rabson 			/* From src/libexec/rtld-elf/rtld.c */
5407e510298SJake Burkholder 			const Elf_Hashelt *hashtab = (const Elf_Hashelt *)
541a4f67738SDoug Rabson 			    (ef->address + dp->d_un.d_ptr);
542a4f67738SDoug Rabson 			ef->nbuckets = hashtab[0];
543a4f67738SDoug Rabson 			ef->nchains = hashtab[1];
544a4f67738SDoug Rabson 			ef->buckets = hashtab + 2;
545a4f67738SDoug Rabson 			ef->chains = ef->buckets + ef->nbuckets;
546a4f67738SDoug Rabson 			break;
547a4f67738SDoug Rabson 		}
548a4f67738SDoug Rabson 		case DT_STRTAB:
549fe3db7c7SDoug Rabson 			ef->strtab = (caddr_t) (ef->address + dp->d_un.d_ptr);
550a4f67738SDoug Rabson 			break;
5512d636ab0SPeter Wemm 		case DT_STRSZ:
5522d636ab0SPeter Wemm 			ef->strsz = dp->d_un.d_val;
5532d636ab0SPeter Wemm 			break;
554a4f67738SDoug Rabson 		case DT_SYMTAB:
555fe3db7c7SDoug Rabson 			ef->symtab = (Elf_Sym*) (ef->address + dp->d_un.d_ptr);
556a4f67738SDoug Rabson 			break;
557a4f67738SDoug Rabson 		case DT_SYMENT:
558a4f67738SDoug Rabson 			if (dp->d_un.d_val != sizeof(Elf_Sym))
5592f22b3ffSMatthew D Fleming 				return (ENOEXEC);
560fe3db7c7SDoug Rabson 			break;
561fe3db7c7SDoug Rabson 		case DT_PLTGOT:
562fe3db7c7SDoug Rabson 			ef->got = (Elf_Addr *) (ef->address + dp->d_un.d_ptr);
563fe3db7c7SDoug Rabson 			break;
564fe3db7c7SDoug Rabson 		case DT_REL:
565fe3db7c7SDoug Rabson 			ef->rel = (const Elf_Rel *) (ef->address + dp->d_un.d_ptr);
566fe3db7c7SDoug Rabson 			break;
567fe3db7c7SDoug Rabson 		case DT_RELSZ:
568fe3db7c7SDoug Rabson 			ef->relsize = dp->d_un.d_val;
569fe3db7c7SDoug Rabson 			break;
570fe3db7c7SDoug Rabson 		case DT_RELENT:
571fe3db7c7SDoug Rabson 			if (dp->d_un.d_val != sizeof(Elf_Rel))
5722f22b3ffSMatthew D Fleming 				return (ENOEXEC);
573fe3db7c7SDoug Rabson 			break;
574fe3db7c7SDoug Rabson 		case DT_JMPREL:
575fe3db7c7SDoug Rabson 			ef->pltrel = (const Elf_Rel *) (ef->address + dp->d_un.d_ptr);
576fe3db7c7SDoug Rabson 			break;
577fe3db7c7SDoug Rabson 		case DT_PLTRELSZ:
578fe3db7c7SDoug Rabson 			ef->pltrelsize = dp->d_un.d_val;
579fe3db7c7SDoug Rabson 			break;
580fe3db7c7SDoug Rabson 		case DT_RELA:
581fe3db7c7SDoug Rabson 			ef->rela = (const Elf_Rela *) (ef->address + dp->d_un.d_ptr);
582fe3db7c7SDoug Rabson 			break;
583fe3db7c7SDoug Rabson 		case DT_RELASZ:
584fe3db7c7SDoug Rabson 			ef->relasize = dp->d_un.d_val;
585fe3db7c7SDoug Rabson 			break;
586fe3db7c7SDoug Rabson 		case DT_RELAENT:
587fe3db7c7SDoug Rabson 			if (dp->d_un.d_val != sizeof(Elf_Rela))
5882f22b3ffSMatthew D Fleming 				return (ENOEXEC);
589fe3db7c7SDoug Rabson 			break;
590fe3db7c7SDoug Rabson 		case DT_PLTREL:
591fe3db7c7SDoug Rabson 			plttype = dp->d_un.d_val;
592fe3db7c7SDoug Rabson 			if (plttype != DT_REL && plttype != DT_RELA)
5932f22b3ffSMatthew D Fleming 				return (ENOEXEC);
594fe3db7c7SDoug Rabson 			break;
595ecb01c64SMarcel Moolenaar #ifdef GDB
596326e27d8SDoug Rabson 		case DT_DEBUG:
597326e27d8SDoug Rabson 			dp->d_un.d_ptr = (Elf_Addr)&r_debug;
598326e27d8SDoug Rabson 			break;
599326e27d8SDoug Rabson #endif
600a4f67738SDoug Rabson 		}
601a4f67738SDoug Rabson 	}
602fe3db7c7SDoug Rabson 
603fe3db7c7SDoug Rabson 	if (plttype == DT_RELA) {
604fe3db7c7SDoug Rabson 		ef->pltrela = (const Elf_Rela *)ef->pltrel;
605fe3db7c7SDoug Rabson 		ef->pltrel = NULL;
606fe3db7c7SDoug Rabson 		ef->pltrelasize = ef->pltrelsize;
607fe3db7c7SDoug Rabson 		ef->pltrelsize = 0;
608fe3db7c7SDoug Rabson 	}
609fe3db7c7SDoug Rabson 
6102d636ab0SPeter Wemm 	ef->ddbsymtab = ef->symtab;
6112d636ab0SPeter Wemm 	ef->ddbsymcnt = ef->nchains;
6122d636ab0SPeter Wemm 	ef->ddbstrtab = ef->strtab;
6132d636ab0SPeter Wemm 	ef->ddbstrcnt = ef->strsz;
6142d636ab0SPeter Wemm 
6152f22b3ffSMatthew D Fleming 	return (0);
616a4f67738SDoug Rabson }
617a4f67738SDoug Rabson 
618a4f67738SDoug Rabson static int
61950c202c5SJeff Roberson parse_dpcpu(elf_file_t ef)
62050c202c5SJeff Roberson {
62150c202c5SJeff Roberson 	int count;
62250c202c5SJeff Roberson 	int error;
62350c202c5SJeff Roberson 
62450c202c5SJeff Roberson 	ef->pcpu_start = 0;
62550c202c5SJeff Roberson 	ef->pcpu_stop = 0;
62650c202c5SJeff Roberson 	error = link_elf_lookup_set(&ef->lf, "pcpu", (void ***)&ef->pcpu_start,
62750c202c5SJeff Roberson 	    (void ***)&ef->pcpu_stop, &count);
62850c202c5SJeff Roberson 	/* Error just means there is no pcpu set to relocate. */
6292f22b3ffSMatthew D Fleming 	if (error != 0)
63050c202c5SJeff Roberson 		return (0);
63150c202c5SJeff Roberson 	count *= sizeof(void *);
63250c202c5SJeff Roberson 	/*
6332f22b3ffSMatthew D Fleming 	 * Allocate space in the primary pcpu area.  Copy in our
6342f22b3ffSMatthew D Fleming 	 * initialization from the data section and then initialize
6352f22b3ffSMatthew D Fleming 	 * all per-cpu storage from that.
63650c202c5SJeff Roberson 	 */
63750c202c5SJeff Roberson 	ef->pcpu_base = (Elf_Addr)(uintptr_t)dpcpu_alloc(count);
6382f22b3ffSMatthew D Fleming 	if (ef->pcpu_base == 0)
63950c202c5SJeff Roberson 		return (ENOSPC);
64050c202c5SJeff Roberson 	memcpy((void *)ef->pcpu_base, (void *)ef->pcpu_start, count);
64150c202c5SJeff Roberson 	dpcpu_copy((void *)ef->pcpu_base, count);
64247813f5dSMikolaj Golub 	elf_set_add(&set_pcpu_list, ef->pcpu_start, ef->pcpu_stop,
64347813f5dSMikolaj Golub 	    ef->pcpu_base);
64450c202c5SJeff Roberson 
64550c202c5SJeff Roberson 	return (0);
64650c202c5SJeff Roberson }
64750c202c5SJeff Roberson 
648eddfbb76SRobert Watson #ifdef VIMAGE
649eddfbb76SRobert Watson static int
650eddfbb76SRobert Watson parse_vnet(elf_file_t ef)
651eddfbb76SRobert Watson {
652eddfbb76SRobert Watson 	int count;
653eddfbb76SRobert Watson 	int error;
654eddfbb76SRobert Watson 
655eddfbb76SRobert Watson 	ef->vnet_start = 0;
656eddfbb76SRobert Watson 	ef->vnet_stop = 0;
657eddfbb76SRobert Watson 	error = link_elf_lookup_set(&ef->lf, "vnet", (void ***)&ef->vnet_start,
658eddfbb76SRobert Watson 	    (void ***)&ef->vnet_stop, &count);
659eddfbb76SRobert Watson 	/* Error just means there is no vnet data set to relocate. */
6602f22b3ffSMatthew D Fleming 	if (error != 0)
661eddfbb76SRobert Watson 		return (0);
662eddfbb76SRobert Watson 	count *= sizeof(void *);
663eddfbb76SRobert Watson 	/*
6642f22b3ffSMatthew D Fleming 	 * Allocate space in the primary vnet area.  Copy in our
6652f22b3ffSMatthew D Fleming 	 * initialization from the data section and then initialize
6662f22b3ffSMatthew D Fleming 	 * all per-vnet storage from that.
667eddfbb76SRobert Watson 	 */
668eddfbb76SRobert Watson 	ef->vnet_base = (Elf_Addr)(uintptr_t)vnet_data_alloc(count);
6692f22b3ffSMatthew D Fleming 	if (ef->vnet_base == 0)
670eddfbb76SRobert Watson 		return (ENOSPC);
671eddfbb76SRobert Watson 	memcpy((void *)ef->vnet_base, (void *)ef->vnet_start, count);
672eddfbb76SRobert Watson 	vnet_data_copy((void *)ef->vnet_base, count);
67347813f5dSMikolaj Golub 	elf_set_add(&set_vnet_list, ef->vnet_start, ef->vnet_stop,
67447813f5dSMikolaj Golub 	    ef->vnet_base);
675eddfbb76SRobert Watson 
676eddfbb76SRobert Watson 	return (0);
677eddfbb76SRobert Watson }
678eddfbb76SRobert Watson #endif
679eddfbb76SRobert Watson 
68050c202c5SJeff Roberson static int
68154823af2SPeter Wemm link_elf_link_preload(linker_class_t cls,
682326e27d8SDoug Rabson     const char* filename, linker_file_t *result)
683de78ca7eSPeter Wemm {
6840067051fSMarcel Moolenaar 	Elf_Addr *ctors_addrp;
6850067051fSMarcel Moolenaar 	Elf_Size *ctors_sizep;
686de78ca7eSPeter Wemm 	caddr_t modptr, baseptr, sizeptr, dynptr;
687de78ca7eSPeter Wemm 	char *type;
688de78ca7eSPeter Wemm 	elf_file_t ef;
689de78ca7eSPeter Wemm 	linker_file_t lf;
690de78ca7eSPeter Wemm 	int error;
691de78ca7eSPeter Wemm 	vm_offset_t dp;
692de78ca7eSPeter Wemm 
69354823af2SPeter Wemm 	/* Look to see if we have the file preloaded */
694de78ca7eSPeter Wemm 	modptr = preload_search_by_name(filename);
695de78ca7eSPeter Wemm 	if (modptr == NULL)
6962f22b3ffSMatthew D Fleming 		return (ENOENT);
697de78ca7eSPeter Wemm 
698de78ca7eSPeter Wemm 	type = (char *)preload_search_info(modptr, MODINFO_TYPE);
699de78ca7eSPeter Wemm 	baseptr = preload_search_info(modptr, MODINFO_ADDR);
700de78ca7eSPeter Wemm 	sizeptr = preload_search_info(modptr, MODINFO_SIZE);
7012f22b3ffSMatthew D Fleming 	dynptr = preload_search_info(modptr,
7022f22b3ffSMatthew D Fleming 	    MODINFO_METADATA | MODINFOMD_DYNAMIC);
70367db8b23SPeter Wemm 	if (type == NULL ||
70467db8b23SPeter Wemm 	    (strcmp(type, "elf" __XSTRING(__ELF_WORD_SIZE) " module") != 0 &&
70567db8b23SPeter Wemm 	     strcmp(type, "elf module") != 0))
706de78ca7eSPeter Wemm 		return (EFTYPE);
707de78ca7eSPeter Wemm 	if (baseptr == NULL || sizeptr == NULL || dynptr == NULL)
708de78ca7eSPeter Wemm 		return (EINVAL);
709de78ca7eSPeter Wemm 
710326e27d8SDoug Rabson 	lf = linker_make_file(filename, &link_elf_class);
7112f22b3ffSMatthew D Fleming 	if (lf == NULL)
7122f22b3ffSMatthew D Fleming 		return (ENOMEM);
713326e27d8SDoug Rabson 
714326e27d8SDoug Rabson 	ef = (elf_file_t) lf;
715326e27d8SDoug Rabson 	ef->preloaded = 1;
716ca65d5c7SPeter Wemm 	ef->modptr = modptr;
717de78ca7eSPeter Wemm 	ef->address = *(caddr_t *)baseptr;
718de78ca7eSPeter Wemm #ifdef SPARSE_MAPPING
719de78ca7eSPeter Wemm 	ef->object = 0;
720de78ca7eSPeter Wemm #endif
721de78ca7eSPeter Wemm 	dp = (vm_offset_t)ef->address + *(vm_offset_t *)dynptr;
722de78ca7eSPeter Wemm 	ef->dynamic = (Elf_Dyn *)dp;
723de78ca7eSPeter Wemm 	lf->address = ef->address;
724de78ca7eSPeter Wemm 	lf->size = *(size_t *)sizeptr;
725de78ca7eSPeter Wemm 
7260067051fSMarcel Moolenaar 	ctors_addrp = (Elf_Addr *)preload_search_info(modptr,
7270067051fSMarcel Moolenaar 	    MODINFO_METADATA | MODINFOMD_CTORS_ADDR);
7280067051fSMarcel Moolenaar 	ctors_sizep = (Elf_Size *)preload_search_info(modptr,
7290067051fSMarcel Moolenaar 	    MODINFO_METADATA | MODINFOMD_CTORS_SIZE);
7300067051fSMarcel Moolenaar 	if (ctors_addrp != NULL && ctors_sizep != NULL) {
7310067051fSMarcel Moolenaar 		lf->ctors_addr = ef->address + *ctors_addrp;
7320067051fSMarcel Moolenaar 		lf->ctors_size = *ctors_sizep;
7330067051fSMarcel Moolenaar 	}
7340067051fSMarcel Moolenaar 
735326e27d8SDoug Rabson 	error = parse_dynamic(ef);
73650c202c5SJeff Roberson 	if (error == 0)
73750c202c5SJeff Roberson 		error = parse_dpcpu(ef);
738eddfbb76SRobert Watson #ifdef VIMAGE
739eddfbb76SRobert Watson 	if (error == 0)
740eddfbb76SRobert Watson 		error = parse_vnet(ef);
741eddfbb76SRobert Watson #endif
7422f22b3ffSMatthew D Fleming 	if (error != 0) {
74365a311fcSPoul-Henning Kamp 		linker_file_unload(lf, LINKER_UNLOAD_FORCE);
7442f22b3ffSMatthew D Fleming 		return (error);
745de78ca7eSPeter Wemm 	}
7467251b4bfSJake Burkholder 	link_elf_reloc_local(lf);
747de78ca7eSPeter Wemm 	*result = lf;
748de78ca7eSPeter Wemm 	return (0);
749de78ca7eSPeter Wemm }
750de78ca7eSPeter Wemm 
751de78ca7eSPeter Wemm static int
75254823af2SPeter Wemm link_elf_link_preload_finish(linker_file_t lf)
75354823af2SPeter Wemm {
75454823af2SPeter Wemm 	elf_file_t ef;
75554823af2SPeter Wemm 	int error;
75654823af2SPeter Wemm 
75754823af2SPeter Wemm 	ef = (elf_file_t) lf;
75854823af2SPeter Wemm 	error = relocate_file(ef);
7592f22b3ffSMatthew D Fleming 	if (error != 0)
7602f22b3ffSMatthew D Fleming 		return (error);
76154823af2SPeter Wemm 	(void)link_elf_preload_parse_symbols(ef);
76254823af2SPeter Wemm 
763c143d6c2SMarcel Moolenaar 	return (link_elf_link_common_finish(lf));
76454823af2SPeter Wemm }
76554823af2SPeter Wemm 
76654823af2SPeter Wemm static int
767c143d6c2SMarcel Moolenaar link_elf_load_file(linker_class_t cls, const char* filename,
768c143d6c2SMarcel Moolenaar     linker_file_t* result)
769a4f67738SDoug Rabson {
770a4f67738SDoug Rabson 	struct nameidata nd;
771b40ce416SJulian Elischer 	struct thread* td = curthread;	/* XXX */
772caab6e90SPeter Wemm 	Elf_Ehdr *hdr;
773caab6e90SPeter Wemm 	caddr_t firstpage;
774fe3db7c7SDoug Rabson 	int nbytes, i;
775fe3db7c7SDoug Rabson 	Elf_Phdr *phdr;
776fe3db7c7SDoug Rabson 	Elf_Phdr *phlimit;
7771a330eb0SPeter Wemm 	Elf_Phdr *segs[MAXSEGS];
778fe3db7c7SDoug Rabson 	int nsegs;
779fe3db7c7SDoug Rabson 	Elf_Phdr *phdyn;
780fe3db7c7SDoug Rabson 	caddr_t mapbase;
781fe3db7c7SDoug Rabson 	size_t mapsize;
782fe3db7c7SDoug Rabson 	Elf_Addr base_vaddr;
783fe3db7c7SDoug Rabson 	Elf_Addr base_vlimit;
784a4f67738SDoug Rabson 	int error = 0;
785526d0bd5SKonstantin Belousov 	ssize_t resid;
786526d0bd5SKonstantin Belousov 	int flags;
787a4f67738SDoug Rabson 	elf_file_t ef;
788a4f67738SDoug Rabson 	linker_file_t lf;
789ca65d5c7SPeter Wemm 	Elf_Shdr *shdr;
790ca65d5c7SPeter Wemm 	int symtabindex;
791ca65d5c7SPeter Wemm 	int symstrindex;
7920067051fSMarcel Moolenaar 	int shstrindex;
793ca65d5c7SPeter Wemm 	int symcnt;
794ca65d5c7SPeter Wemm 	int strcnt;
7950067051fSMarcel Moolenaar 	char *shstrs;
796ca65d5c7SPeter Wemm 
797ca65d5c7SPeter Wemm 	shdr = NULL;
798ca65d5c7SPeter Wemm 	lf = NULL;
7990067051fSMarcel Moolenaar 	shstrs = NULL;
800a4f67738SDoug Rabson 
8015050aa86SKonstantin Belousov 	NDINIT(&nd, LOOKUP, FOLLOW, UIO_SYSSPACE, filename, td);
802e6796b67SKirk McKusick 	flags = FREAD;
8039e223287SKonstantin Belousov 	error = vn_open(&nd, &flags, 0, NULL);
8042f22b3ffSMatthew D Fleming 	if (error != 0)
8052f22b3ffSMatthew D Fleming 		return (error);
806762e6b85SEivind Eklund 	NDFREE(&nd, NDF_ONLY_PNBUF);
8071f49b573SRuslan Ermilov 	if (nd.ni_vp->v_type != VREG) {
8081f49b573SRuslan Ermilov 		error = ENOEXEC;
8091f49b573SRuslan Ermilov 		firstpage = NULL;
8101f49b573SRuslan Ermilov 		goto out;
8111f49b573SRuslan Ermilov 	}
812a3df768bSRobert Watson #ifdef MAC
81330d239bcSRobert Watson 	error = mac_kld_check_load(curthread->td_ucred, nd.ni_vp);
8142f22b3ffSMatthew D Fleming 	if (error != 0) {
815a3df768bSRobert Watson 		firstpage = NULL;
816a3df768bSRobert Watson 		goto out;
817a3df768bSRobert Watson 	}
818a3df768bSRobert Watson #endif
819a4f67738SDoug Rabson 
820a4f67738SDoug Rabson 	/*
821fe3db7c7SDoug Rabson 	 * Read the elf header from the file.
822a4f67738SDoug Rabson 	 */
823a163d034SWarner Losh 	firstpage = malloc(PAGE_SIZE, M_LINKER, M_WAITOK);
824caab6e90SPeter Wemm 	hdr = (Elf_Ehdr *)firstpage;
825caab6e90SPeter Wemm 	error = vn_rdwr(UIO_READ, nd.ni_vp, firstpage, PAGE_SIZE, 0,
8269ca43589SRobert Watson 	    UIO_SYSSPACE, IO_NODELOCKED, td->td_ucred, NOCRED,
8279ca43589SRobert Watson 	    &resid, td);
828caab6e90SPeter Wemm 	nbytes = PAGE_SIZE - resid;
8292f22b3ffSMatthew D Fleming 	if (error != 0)
830a4f67738SDoug Rabson 		goto out;
831a4f67738SDoug Rabson 
832caab6e90SPeter Wemm 	if (!IS_ELF(*hdr)) {
833fe3db7c7SDoug Rabson 		error = ENOEXEC;
834a4f67738SDoug Rabson 		goto out;
835fe3db7c7SDoug Rabson 	}
836fe3db7c7SDoug Rabson 
8372f22b3ffSMatthew D Fleming 	if (hdr->e_ident[EI_CLASS] != ELF_TARG_CLASS ||
8382f22b3ffSMatthew D Fleming 	    hdr->e_ident[EI_DATA] != ELF_TARG_DATA) {
839552f9f63SEdwin Groothuis 		link_elf_error(filename, "Unsupported file layout");
840fe3db7c7SDoug Rabson 		error = ENOEXEC;
841fe3db7c7SDoug Rabson 		goto out;
842fe3db7c7SDoug Rabson 	}
8432f22b3ffSMatthew D Fleming 	if (hdr->e_ident[EI_VERSION] != EV_CURRENT ||
8442f22b3ffSMatthew D Fleming 	    hdr->e_version != EV_CURRENT) {
845552f9f63SEdwin Groothuis 		link_elf_error(filename, "Unsupported file version");
846fe3db7c7SDoug Rabson 		error = ENOEXEC;
847fe3db7c7SDoug Rabson 		goto out;
848fe3db7c7SDoug Rabson 	}
849caab6e90SPeter Wemm 	if (hdr->e_type != ET_EXEC && hdr->e_type != ET_DYN) {
850a1d7ce03SAttilio Rao 		error = ENOSYS;
851fe3db7c7SDoug Rabson 		goto out;
852fe3db7c7SDoug Rabson 	}
853caab6e90SPeter Wemm 	if (hdr->e_machine != ELF_TARG_MACH) {
854552f9f63SEdwin Groothuis 		link_elf_error(filename, "Unsupported machine");
855fe3db7c7SDoug Rabson 		error = ENOEXEC;
856fe3db7c7SDoug Rabson 		goto out;
857fe3db7c7SDoug Rabson 	}
858a4f67738SDoug Rabson 
859a4f67738SDoug Rabson 	/*
8602f22b3ffSMatthew D Fleming 	 * We rely on the program header being in the first page.
8612f22b3ffSMatthew D Fleming 	 * This is not strictly required by the ABI specification, but
8622f22b3ffSMatthew D Fleming 	 * it seems to always true in practice.  And, it simplifies
8632f22b3ffSMatthew D Fleming 	 * things considerably.
864a4f67738SDoug Rabson 	 */
865caab6e90SPeter Wemm 	if (!((hdr->e_phentsize == sizeof(Elf_Phdr)) &&
866caab6e90SPeter Wemm 	      (hdr->e_phoff + hdr->e_phnum*sizeof(Elf_Phdr) <= PAGE_SIZE) &&
867caab6e90SPeter Wemm 	      (hdr->e_phoff + hdr->e_phnum*sizeof(Elf_Phdr) <= nbytes)))
868552f9f63SEdwin Groothuis 		link_elf_error(filename, "Unreadable program headers");
869fe3db7c7SDoug Rabson 
870fe3db7c7SDoug Rabson 	/*
871fe3db7c7SDoug Rabson 	 * Scan the program header entries, and save key information.
872fe3db7c7SDoug Rabson 	 *
873fe3db7c7SDoug Rabson 	 * We rely on there being exactly two load segments, text and data,
874fe3db7c7SDoug Rabson 	 * in that order.
875fe3db7c7SDoug Rabson 	 */
876caab6e90SPeter Wemm 	phdr = (Elf_Phdr *) (firstpage + hdr->e_phoff);
877caab6e90SPeter Wemm 	phlimit = phdr + hdr->e_phnum;
878fe3db7c7SDoug Rabson 	nsegs = 0;
879fe3db7c7SDoug Rabson 	phdyn = NULL;
880fe3db7c7SDoug Rabson 	while (phdr < phlimit) {
881fe3db7c7SDoug Rabson 		switch (phdr->p_type) {
882fe3db7c7SDoug Rabson 		case PT_LOAD:
8831a330eb0SPeter Wemm 			if (nsegs == MAXSEGS) {
884552f9f63SEdwin Groothuis 				link_elf_error(filename, "Too many sections");
885fe3db7c7SDoug Rabson 				error = ENOEXEC;
886fe3db7c7SDoug Rabson 				goto out;
887fe3db7c7SDoug Rabson 			}
88887b1831fSPoul-Henning Kamp 			/*
88987b1831fSPoul-Henning Kamp 			 * XXX: We just trust they come in right order ??
89087b1831fSPoul-Henning Kamp 			 */
891fe3db7c7SDoug Rabson 			segs[nsegs] = phdr;
892fe3db7c7SDoug Rabson 			++nsegs;
893fe3db7c7SDoug Rabson 			break;
894fe3db7c7SDoug Rabson 
895fe3db7c7SDoug Rabson 		case PT_DYNAMIC:
896fe3db7c7SDoug Rabson 			phdyn = phdr;
897fe3db7c7SDoug Rabson 			break;
8989548091bSBoris Popov 
8999548091bSBoris Popov 		case PT_INTERP:
900a1d7ce03SAttilio Rao 			error = ENOSYS;
9019548091bSBoris Popov 			goto out;
902fe3db7c7SDoug Rabson 		}
903fe3db7c7SDoug Rabson 
904fe3db7c7SDoug Rabson 		++phdr;
905fe3db7c7SDoug Rabson 	}
906fe3db7c7SDoug Rabson 	if (phdyn == NULL) {
907552f9f63SEdwin Groothuis 		link_elf_error(filename, "Object is not dynamically-linked");
908fe3db7c7SDoug Rabson 		error = ENOEXEC;
909fe3db7c7SDoug Rabson 		goto out;
910fe3db7c7SDoug Rabson 	}
9111a330eb0SPeter Wemm 	if (nsegs == 0) {
912552f9f63SEdwin Groothuis 		link_elf_error(filename, "No sections");
91387b1831fSPoul-Henning Kamp 		error = ENOEXEC;
91487b1831fSPoul-Henning Kamp 		goto out;
91587b1831fSPoul-Henning Kamp 	}
916fe3db7c7SDoug Rabson 
917fe3db7c7SDoug Rabson 	/*
9182f22b3ffSMatthew D Fleming 	 * Allocate the entire address space of the object, to stake
9192f22b3ffSMatthew D Fleming 	 * out our contiguous region, and to establish the base
9202f22b3ffSMatthew D Fleming 	 * address for relocation.
921fe3db7c7SDoug Rabson 	 */
922fe3db7c7SDoug Rabson 	base_vaddr = trunc_page(segs[0]->p_vaddr);
9231a330eb0SPeter Wemm 	base_vlimit = round_page(segs[nsegs - 1]->p_vaddr +
9241a330eb0SPeter Wemm 	    segs[nsegs - 1]->p_memsz);
925fe3db7c7SDoug Rabson 	mapsize = base_vlimit - base_vaddr;
926fe3db7c7SDoug Rabson 
927326e27d8SDoug Rabson 	lf = linker_make_file(filename, &link_elf_class);
9282f22b3ffSMatthew D Fleming 	if (lf == NULL) {
929326e27d8SDoug Rabson 		error = ENOMEM;
930326e27d8SDoug Rabson 		goto out;
931326e27d8SDoug Rabson 	}
932326e27d8SDoug Rabson 
933326e27d8SDoug Rabson 	ef = (elf_file_t) lf;
934fe3db7c7SDoug Rabson #ifdef SPARSE_MAPPING
935fe3db7c7SDoug Rabson 	ef->object = vm_object_allocate(OBJT_DEFAULT, mapsize >> PAGE_SHIFT);
936fe3db7c7SDoug Rabson 	if (ef->object == NULL) {
937fe3db7c7SDoug Rabson 		error = ENOMEM;
938fe3db7c7SDoug Rabson 		goto out;
939fe3db7c7SDoug Rabson 	}
940fe3db7c7SDoug Rabson 	ef->address = (caddr_t) vm_map_min(kernel_map);
941fe3db7c7SDoug Rabson 	error = vm_map_find(kernel_map, ef->object, 0,
942edb572a3SJohn Baldwin 	    (vm_offset_t *) &ef->address, mapsize, 0, VMFS_OPTIMAL_SPACE,
943fe3db7c7SDoug Rabson 	    VM_PROT_ALL, VM_PROT_ALL, 0);
9442f22b3ffSMatthew D Fleming 	if (error != 0) {
945fe3db7c7SDoug Rabson 		vm_object_deallocate(ef->object);
946326e27d8SDoug Rabson 		ef->object = 0;
947fe3db7c7SDoug Rabson 		goto out;
948fe3db7c7SDoug Rabson 	}
949fe3db7c7SDoug Rabson #else
95078bcf87eSOlivier Houchard 	ef->address = malloc(mapsize, M_LINKER, M_EXEC | M_WAITOK);
951fe3db7c7SDoug Rabson #endif
952fe3db7c7SDoug Rabson 	mapbase = ef->address;
953a4f67738SDoug Rabson 
954a4f67738SDoug Rabson 	/*
955a4f67738SDoug Rabson 	 * Read the text and data sections and zero the bss.
956a4f67738SDoug Rabson 	 */
9571a330eb0SPeter Wemm 	for (i = 0; i < nsegs; i++) {
958fe3db7c7SDoug Rabson 		caddr_t segbase = mapbase + segs[i]->p_vaddr - base_vaddr;
959fe3db7c7SDoug Rabson 		error = vn_rdwr(UIO_READ, nd.ni_vp,
960fe3db7c7SDoug Rabson 		    segbase, segs[i]->p_filesz, segs[i]->p_offset,
9619ca43589SRobert Watson 		    UIO_SYSSPACE, IO_NODELOCKED, td->td_ucred, NOCRED,
9629ca43589SRobert Watson 		    &resid, td);
9632f22b3ffSMatthew D Fleming 		if (error != 0)
964a4f67738SDoug Rabson 			goto out;
965fe3db7c7SDoug Rabson 		bzero(segbase + segs[i]->p_filesz,
966fe3db7c7SDoug Rabson 		    segs[i]->p_memsz - segs[i]->p_filesz);
96741673965SAlan Cox 
96841673965SAlan Cox #ifdef SPARSE_MAPPING
96941673965SAlan Cox 		/*
97041673965SAlan Cox 		 * Wire down the pages
97141673965SAlan Cox 		 */
9725d3043ceSAlan Cox 		error = vm_map_wire(kernel_map,
97341673965SAlan Cox 		    (vm_offset_t) segbase,
97441673965SAlan Cox 		    (vm_offset_t) segbase + segs[i]->p_memsz,
97541673965SAlan Cox 		    VM_MAP_WIRE_SYSTEM|VM_MAP_WIRE_NOHOLES);
9765d3043ceSAlan Cox 		if (error != KERN_SUCCESS) {
9775d3043ceSAlan Cox 			error = ENOMEM;
9785d3043ceSAlan Cox 			goto out;
9795d3043ceSAlan Cox 		}
98041673965SAlan Cox #endif
981fe3db7c7SDoug Rabson 	}
982fe3db7c7SDoug Rabson 
983f99502a4SBrian Feldman #ifdef GPROF
984f99502a4SBrian Feldman 	/* Update profiling information with the new text segment. */
98570f37788SJohn Baldwin 	mtx_lock(&Giant);
986853a17adSEnji Cooper 	kmupetext((uintfptr_t)(mapbase + segs[0]->p_vaddr - base_vaddr +
987f99502a4SBrian Feldman 	    segs[0]->p_memsz));
98870f37788SJohn Baldwin 	mtx_unlock(&Giant);
989f99502a4SBrian Feldman #endif
990f99502a4SBrian Feldman 
991326e27d8SDoug Rabson 	ef->dynamic = (Elf_Dyn *) (mapbase + phdyn->p_vaddr - base_vaddr);
992a4f67738SDoug Rabson 
993a4f67738SDoug Rabson 	lf->address = ef->address;
994fe3db7c7SDoug Rabson 	lf->size = mapsize;
995a4f67738SDoug Rabson 
996326e27d8SDoug Rabson 	error = parse_dynamic(ef);
9972f22b3ffSMatthew D Fleming 	if (error != 0)
998de78ca7eSPeter Wemm 		goto out;
99950c202c5SJeff Roberson 	error = parse_dpcpu(ef);
10002f22b3ffSMatthew D Fleming 	if (error != 0)
100150c202c5SJeff Roberson 		goto out;
1002eddfbb76SRobert Watson #ifdef VIMAGE
1003eddfbb76SRobert Watson 	error = parse_vnet(ef);
10042f22b3ffSMatthew D Fleming 	if (error != 0)
1005eddfbb76SRobert Watson 		goto out;
1006eddfbb76SRobert Watson #endif
10077251b4bfSJake Burkholder 	link_elf_reloc_local(lf);
10087251b4bfSJake Burkholder 
10094f7afc20SKonstantin Belousov 	VOP_UNLOCK(nd.ni_vp, 0);
10107b9716baSIan Dowse 	error = linker_load_dependencies(lf);
10114f7afc20SKonstantin Belousov 	vn_lock(nd.ni_vp, LK_EXCLUSIVE | LK_RETRY);
10122f22b3ffSMatthew D Fleming 	if (error != 0)
1013de78ca7eSPeter Wemm 		goto out;
1014326e27d8SDoug Rabson 	error = relocate_file(ef);
10152f22b3ffSMatthew D Fleming 	if (error != 0)
1016ca65d5c7SPeter Wemm 		goto out;
1017ca65d5c7SPeter Wemm 
10182f22b3ffSMatthew D Fleming 	/*
10192f22b3ffSMatthew D Fleming 	 * Try and load the symbol table if it's present.  (you can
10202f22b3ffSMatthew D Fleming 	 * strip it!)
10212f22b3ffSMatthew D Fleming 	 */
1022caab6e90SPeter Wemm 	nbytes = hdr->e_shnum * hdr->e_shentsize;
1023caab6e90SPeter Wemm 	if (nbytes == 0 || hdr->e_shoff == 0)
1024ca65d5c7SPeter Wemm 		goto nosyms;
1025a163d034SWarner Losh 	shdr = malloc(nbytes, M_LINKER, M_WAITOK | M_ZERO);
1026ca65d5c7SPeter Wemm 	error = vn_rdwr(UIO_READ, nd.ni_vp,
1027caab6e90SPeter Wemm 	    (caddr_t)shdr, nbytes, hdr->e_shoff,
10289ca43589SRobert Watson 	    UIO_SYSSPACE, IO_NODELOCKED, td->td_ucred, NOCRED,
10299ca43589SRobert Watson 	    &resid, td);
10302f22b3ffSMatthew D Fleming 	if (error != 0)
1031ca65d5c7SPeter Wemm 		goto out;
10320067051fSMarcel Moolenaar 
10330067051fSMarcel Moolenaar 	/* Read section string table */
10340067051fSMarcel Moolenaar 	shstrindex = hdr->e_shstrndx;
10350067051fSMarcel Moolenaar 	if (shstrindex != 0 && shdr[shstrindex].sh_type == SHT_STRTAB &&
10360067051fSMarcel Moolenaar 	    shdr[shstrindex].sh_size != 0) {
10370067051fSMarcel Moolenaar 		nbytes = shdr[shstrindex].sh_size;
10380067051fSMarcel Moolenaar 		shstrs = malloc(nbytes, M_LINKER, M_WAITOK | M_ZERO);
10390067051fSMarcel Moolenaar 		error = vn_rdwr(UIO_READ, nd.ni_vp, (caddr_t)shstrs, nbytes,
10400067051fSMarcel Moolenaar 		    shdr[shstrindex].sh_offset, UIO_SYSSPACE, IO_NODELOCKED,
10410067051fSMarcel Moolenaar 		    td->td_ucred, NOCRED, &resid, td);
10420067051fSMarcel Moolenaar 		if (error)
10430067051fSMarcel Moolenaar 			goto out;
10440067051fSMarcel Moolenaar 	}
10450067051fSMarcel Moolenaar 
1046ca65d5c7SPeter Wemm 	symtabindex = -1;
1047ca65d5c7SPeter Wemm 	symstrindex = -1;
1048caab6e90SPeter Wemm 	for (i = 0; i < hdr->e_shnum; i++) {
1049ca65d5c7SPeter Wemm 		if (shdr[i].sh_type == SHT_SYMTAB) {
1050ca65d5c7SPeter Wemm 			symtabindex = i;
1051ca65d5c7SPeter Wemm 			symstrindex = shdr[i].sh_link;
10520067051fSMarcel Moolenaar 		} else if (shstrs != NULL && shdr[i].sh_name != 0 &&
10530067051fSMarcel Moolenaar 		    strcmp(shstrs + shdr[i].sh_name, ".ctors") == 0) {
10540067051fSMarcel Moolenaar 			/* Record relocated address and size of .ctors. */
10550067051fSMarcel Moolenaar 			lf->ctors_addr = mapbase + shdr[i].sh_addr - base_vaddr;
10560067051fSMarcel Moolenaar 			lf->ctors_size = shdr[i].sh_size;
1057ca65d5c7SPeter Wemm 		}
1058ca65d5c7SPeter Wemm 	}
1059ca65d5c7SPeter Wemm 	if (symtabindex < 0 || symstrindex < 0)
1060ca65d5c7SPeter Wemm 		goto nosyms;
1061ca65d5c7SPeter Wemm 
1062ca65d5c7SPeter Wemm 	symcnt = shdr[symtabindex].sh_size;
1063a163d034SWarner Losh 	ef->symbase = malloc(symcnt, M_LINKER, M_WAITOK);
1064ca65d5c7SPeter Wemm 	strcnt = shdr[symstrindex].sh_size;
1065a163d034SWarner Losh 	ef->strbase = malloc(strcnt, M_LINKER, M_WAITOK);
1066ca65d5c7SPeter Wemm 
1067ca65d5c7SPeter Wemm 	error = vn_rdwr(UIO_READ, nd.ni_vp,
1068ca65d5c7SPeter Wemm 	    ef->symbase, symcnt, shdr[symtabindex].sh_offset,
10699ca43589SRobert Watson 	    UIO_SYSSPACE, IO_NODELOCKED, td->td_ucred, NOCRED,
10709ca43589SRobert Watson 	    &resid, td);
10712f22b3ffSMatthew D Fleming 	if (error != 0)
1072ca65d5c7SPeter Wemm 		goto out;
1073ca65d5c7SPeter Wemm 	error = vn_rdwr(UIO_READ, nd.ni_vp,
1074ca65d5c7SPeter Wemm 	    ef->strbase, strcnt, shdr[symstrindex].sh_offset,
10759ca43589SRobert Watson 	    UIO_SYSSPACE, IO_NODELOCKED, td->td_ucred, NOCRED,
10769ca43589SRobert Watson 	    &resid, td);
10772f22b3ffSMatthew D Fleming 	if (error != 0)
1078ca65d5c7SPeter Wemm 		goto out;
1079ca65d5c7SPeter Wemm 
1080ca65d5c7SPeter Wemm 	ef->ddbsymcnt = symcnt / sizeof(Elf_Sym);
1081ca65d5c7SPeter Wemm 	ef->ddbsymtab = (const Elf_Sym *)ef->symbase;
1082ca65d5c7SPeter Wemm 	ef->ddbstrcnt = strcnt;
1083ca65d5c7SPeter Wemm 	ef->ddbstrtab = ef->strbase;
1084ca65d5c7SPeter Wemm 
10858a710317SMarcel Moolenaar nosyms:
1086c143d6c2SMarcel Moolenaar 	error = link_elf_link_common_finish(lf);
10872f22b3ffSMatthew D Fleming 	if (error != 0)
1088c143d6c2SMarcel Moolenaar 		goto out;
1089326e27d8SDoug Rabson 
1090a4f67738SDoug Rabson 	*result = lf;
1091a4f67738SDoug Rabson 
1092a4f67738SDoug Rabson out:
1093f1d2d305SKonstantin Belousov 	VOP_UNLOCK(nd.ni_vp, 0);
1094f1d2d305SKonstantin Belousov 	vn_close(nd.ni_vp, FREAD, td->td_ucred, td);
10952f22b3ffSMatthew D Fleming 	if (error != 0 && lf != NULL)
109665a311fcSPoul-Henning Kamp 		linker_file_unload(lf, LINKER_UNLOAD_FORCE);
1097ca65d5c7SPeter Wemm 	free(shdr, M_LINKER);
1098caab6e90SPeter Wemm 	free(firstpage, M_LINKER);
10990067051fSMarcel Moolenaar 	free(shstrs, M_LINKER);
1100a4f67738SDoug Rabson 
11012f22b3ffSMatthew D Fleming 	return (error);
1102a4f67738SDoug Rabson }
1103a4f67738SDoug Rabson 
110450c202c5SJeff Roberson Elf_Addr
110550c202c5SJeff Roberson elf_relocaddr(linker_file_t lf, Elf_Addr x)
110650c202c5SJeff Roberson {
110750c202c5SJeff Roberson 	elf_file_t ef;
110850c202c5SJeff Roberson 
110950c202c5SJeff Roberson 	ef = (elf_file_t)lf;
111050c202c5SJeff Roberson 	if (x >= ef->pcpu_start && x < ef->pcpu_stop)
111150c202c5SJeff Roberson 		return ((x - ef->pcpu_start) + ef->pcpu_base);
1112eddfbb76SRobert Watson #ifdef VIMAGE
1113eddfbb76SRobert Watson 	if (x >= ef->vnet_start && x < ef->vnet_stop)
1114eddfbb76SRobert Watson 		return ((x - ef->vnet_start) + ef->vnet_base);
1115eddfbb76SRobert Watson #endif
111650c202c5SJeff Roberson 	return (x);
111750c202c5SJeff Roberson }
111850c202c5SJeff Roberson 
111950c202c5SJeff Roberson 
1120a4f67738SDoug Rabson static void
1121de78ca7eSPeter Wemm link_elf_unload_file(linker_file_t file)
1122a4f67738SDoug Rabson {
1123326e27d8SDoug Rabson 	elf_file_t ef = (elf_file_t) file;
1124a4f67738SDoug Rabson 
11252f22b3ffSMatthew D Fleming 	if (ef->pcpu_base != 0) {
11262f22b3ffSMatthew D Fleming 		dpcpu_free((void *)ef->pcpu_base,
11272f22b3ffSMatthew D Fleming 		    ef->pcpu_stop - ef->pcpu_start);
112847813f5dSMikolaj Golub 		elf_set_delete(&set_pcpu_list, ef->pcpu_start);
112950c202c5SJeff Roberson 	}
1130eddfbb76SRobert Watson #ifdef VIMAGE
11312f22b3ffSMatthew D Fleming 	if (ef->vnet_base != 0) {
11322f22b3ffSMatthew D Fleming 		vnet_data_free((void *)ef->vnet_base,
11332f22b3ffSMatthew D Fleming 		    ef->vnet_stop - ef->vnet_start);
113447813f5dSMikolaj Golub 		elf_set_delete(&set_vnet_list, ef->vnet_start);
1135eddfbb76SRobert Watson 	}
1136eddfbb76SRobert Watson #endif
1137ecb01c64SMarcel Moolenaar #ifdef GDB
11382f22b3ffSMatthew D Fleming 	if (ef->gdb.l_ld != NULL) {
1139326e27d8SDoug Rabson 		GDB_STATE(RT_DELETE);
1140ed6c3888SPeter Wemm 		free((void *)(uintptr_t)ef->gdb.l_name, M_LINKER);
1141326e27d8SDoug Rabson 		link_elf_delete_gdb(&ef->gdb);
1142326e27d8SDoug Rabson 		GDB_STATE(RT_CONSISTENT);
1143326e27d8SDoug Rabson 	}
1144326e27d8SDoug Rabson #endif
1145326e27d8SDoug Rabson 
11461aeb23cdSMarcel Moolenaar 	/* Notify MD code that a module is being unloaded. */
11471aeb23cdSMarcel Moolenaar 	elf_cpu_unload_file(file);
11481aeb23cdSMarcel Moolenaar 
1149326e27d8SDoug Rabson 	if (ef->preloaded) {
115054823af2SPeter Wemm 		link_elf_unload_preload(file);
1151326e27d8SDoug Rabson 		return;
1152326e27d8SDoug Rabson 	}
1153c143d6c2SMarcel Moolenaar 
1154fe3db7c7SDoug Rabson #ifdef SPARSE_MAPPING
11552f22b3ffSMatthew D Fleming 	if (ef->object != NULL) {
1156fe3db7c7SDoug Rabson 		vm_map_remove(kernel_map, (vm_offset_t) ef->address,
1157fe3db7c7SDoug Rabson 		    (vm_offset_t) ef->address
1158fe3db7c7SDoug Rabson 		    + (ef->object->size << PAGE_SHIFT));
1159fe3db7c7SDoug Rabson 	}
1160fe3db7c7SDoug Rabson #else
1161a4f67738SDoug Rabson 	free(ef->address, M_LINKER);
1162fe3db7c7SDoug Rabson #endif
1163ca65d5c7SPeter Wemm 	free(ef->symbase, M_LINKER);
1164ca65d5c7SPeter Wemm 	free(ef->strbase, M_LINKER);
1165a2024a3eSJohn Birrell 	free(ef->ctftab, M_LINKER);
1166a2024a3eSJohn Birrell 	free(ef->ctfoff, M_LINKER);
1167a2024a3eSJohn Birrell 	free(ef->typoff, M_LINKER);
1168a4f67738SDoug Rabson }
1169a4f67738SDoug Rabson 
1170de78ca7eSPeter Wemm static void
117154823af2SPeter Wemm link_elf_unload_preload(linker_file_t file)
1172de78ca7eSPeter Wemm {
117373624a80SMark Johnston 	if (file->pathname != NULL)
117473624a80SMark Johnston 		preload_delete_name(file->pathname);
1175de78ca7eSPeter Wemm }
1176de78ca7eSPeter Wemm 
1177fe3db7c7SDoug Rabson static const char *
1178757686b1SMarcel Moolenaar symbol_name(elf_file_t ef, Elf_Size r_info)
1179a4f67738SDoug Rabson {
1180fe3db7c7SDoug Rabson 	const Elf_Sym *ref;
1181a4f67738SDoug Rabson 
1182aa855a59SPeter Wemm 	if (ELF_R_SYM(r_info)) {
1183aa855a59SPeter Wemm 		ref = ef->symtab + ELF_R_SYM(r_info);
11842f22b3ffSMatthew D Fleming 		return (ef->strtab + ref->st_name);
11852f22b3ffSMatthew D Fleming 	}
11862f22b3ffSMatthew D Fleming 	return (NULL);
1187a4f67738SDoug Rabson }
1188a4f67738SDoug Rabson 
1189a4f67738SDoug Rabson static int
1190*36716fe2SMark Johnston symbol_type(elf_file_t ef, Elf_Size r_info)
1191a4f67738SDoug Rabson {
1192*36716fe2SMark Johnston 	const Elf_Sym *ref;
1193*36716fe2SMark Johnston 
1194*36716fe2SMark Johnston 	if (ELF_R_SYM(r_info)) {
1195*36716fe2SMark Johnston 		ref = ef->symtab + ELF_R_SYM(r_info);
1196*36716fe2SMark Johnston 		return (ELF_ST_TYPE(ref->st_info));
1197*36716fe2SMark Johnston 	}
1198*36716fe2SMark Johnston 	return (STT_NOTYPE);
1199*36716fe2SMark Johnston }
1200*36716fe2SMark Johnston 
1201*36716fe2SMark Johnston static int
1202*36716fe2SMark Johnston relocate_file1(elf_file_t ef, elf_lookup_fn lookup, elf_reloc_fn reloc,
1203*36716fe2SMark Johnston     bool ifuncs)
1204*36716fe2SMark Johnston {
1205fe3db7c7SDoug Rabson 	const Elf_Rel *rel;
1206fe3db7c7SDoug Rabson 	const Elf_Rela *rela;
1207aa855a59SPeter Wemm 	const char *symname;
1208a4f67738SDoug Rabson 
1209*36716fe2SMark Johnston #define	APPLY_RELOCS(iter, tbl, tblsize, type) do {			\
1210*36716fe2SMark Johnston 	for ((iter) = (tbl); (iter) != NULL &&				\
1211*36716fe2SMark Johnston 	    (iter) < (tbl) + (tblsize) / sizeof(*(iter)); (iter)++) {	\
1212*36716fe2SMark Johnston 		if ((symbol_type(ef, (iter)->r_info) ==			\
1213*36716fe2SMark Johnston 		    STT_GNU_IFUNC ||					\
1214*36716fe2SMark Johnston 		    elf_is_ifunc_reloc((iter)->r_info)) != ifuncs)	\
1215*36716fe2SMark Johnston 			continue;					\
1216*36716fe2SMark Johnston 		if (reloc(&ef->lf, (Elf_Addr)ef->address,		\
1217*36716fe2SMark Johnston 		    (iter), (type), lookup)) {				\
1218*36716fe2SMark Johnston 			symname = symbol_name(ef, (iter)->r_info);	\
1219*36716fe2SMark Johnston 			printf("link_elf: symbol %s undefined\n",	\
1220*36716fe2SMark Johnston 			    symname);					\
1221*36716fe2SMark Johnston 			return (ENOENT);				\
1222*36716fe2SMark Johnston 		}							\
1223*36716fe2SMark Johnston 	}								\
1224*36716fe2SMark Johnston } while (0)
1225a4f67738SDoug Rabson 
1226*36716fe2SMark Johnston 	APPLY_RELOCS(rel, ef->rel, ef->relsize, ELF_RELOC_REL);
1227*36716fe2SMark Johnston 	APPLY_RELOCS(rela, ef->rela, ef->relasize, ELF_RELOC_RELA);
1228*36716fe2SMark Johnston 	APPLY_RELOCS(rel, ef->pltrel, ef->pltrelsize, ELF_RELOC_REL);
1229*36716fe2SMark Johnston 	APPLY_RELOCS(rela, ef->pltrela, ef->pltrelasize, ELF_RELOC_RELA);
1230a4f67738SDoug Rabson 
1231*36716fe2SMark Johnston #undef APPLY_RELOCS
1232a4f67738SDoug Rabson 
12332f22b3ffSMatthew D Fleming 	return (0);
1234a4f67738SDoug Rabson }
1235a4f67738SDoug Rabson 
12367035cf14SKonstantin Belousov static int
12377035cf14SKonstantin Belousov relocate_file(elf_file_t ef)
12387035cf14SKonstantin Belousov {
1239*36716fe2SMark Johnston 	int error;
12407035cf14SKonstantin Belousov 
1241*36716fe2SMark Johnston 	error = relocate_file1(ef, elf_lookup, elf_reloc, false);
1242*36716fe2SMark Johnston 	if (error == 0)
1243*36716fe2SMark Johnston 		error = relocate_file1(ef, elf_lookup, elf_reloc, true);
1244*36716fe2SMark Johnston 	return (error);
12457035cf14SKonstantin Belousov }
12467035cf14SKonstantin Belousov 
1247fe3db7c7SDoug Rabson /*
1248fe3db7c7SDoug Rabson  * Hash function for symbol table lookup.  Don't even think about changing
1249fe3db7c7SDoug Rabson  * this.  It is specified by the System V ABI.
1250fe3db7c7SDoug Rabson  */
1251fe3db7c7SDoug Rabson static unsigned long
1252fe3db7c7SDoug Rabson elf_hash(const char *name)
1253a4f67738SDoug Rabson {
1254fe3db7c7SDoug Rabson 	const unsigned char *p = (const unsigned char *) name;
1255fe3db7c7SDoug Rabson 	unsigned long h = 0;
1256fe3db7c7SDoug Rabson 	unsigned long g;
1257a4f67738SDoug Rabson 
1258fe3db7c7SDoug Rabson 	while (*p != '\0') {
1259fe3db7c7SDoug Rabson 		h = (h << 4) + *p++;
1260fe3db7c7SDoug Rabson 		if ((g = h & 0xf0000000) != 0)
1261fe3db7c7SDoug Rabson 			h ^= g >> 24;
1262fe3db7c7SDoug Rabson 		h &= ~g;
1263a4f67738SDoug Rabson 	}
12642f22b3ffSMatthew D Fleming 	return (h);
1265fe3db7c7SDoug Rabson }
1266a4f67738SDoug Rabson 
126737c84183SPoul-Henning Kamp static int
1268d254af07SMatthew Dillon link_elf_lookup_symbol(linker_file_t lf, const char *name, c_linker_sym_t *sym)
1269a4f67738SDoug Rabson {
1270326e27d8SDoug Rabson 	elf_file_t ef = (elf_file_t) lf;
1271fe3db7c7SDoug Rabson 	unsigned long symnum;
12722d636ab0SPeter Wemm 	const Elf_Sym* symp;
12732d636ab0SPeter Wemm 	const char *strp;
1274fe3db7c7SDoug Rabson 	unsigned long hash;
1275a4f67738SDoug Rabson 	int i;
1276a4f67738SDoug Rabson 
1277f6494f2eSJohn Baldwin 	/* If we don't have a hash, bail. */
1278f6494f2eSJohn Baldwin 	if (ef->buckets == NULL || ef->nbuckets == 0) {
1279f6494f2eSJohn Baldwin 		printf("link_elf_lookup_symbol: missing symbol hash table\n");
12802f22b3ffSMatthew D Fleming 		return (ENOENT);
1281f6494f2eSJohn Baldwin 	}
1282f6494f2eSJohn Baldwin 
12832d636ab0SPeter Wemm 	/* First, search hashed global symbols */
1284fe3db7c7SDoug Rabson 	hash = elf_hash(name);
1285fe3db7c7SDoug Rabson 	symnum = ef->buckets[hash % ef->nbuckets];
1286fe3db7c7SDoug Rabson 
1287fe3db7c7SDoug Rabson 	while (symnum != STN_UNDEF) {
1288fe3db7c7SDoug Rabson 		if (symnum >= ef->nchains) {
12892f22b3ffSMatthew D Fleming 			printf("%s: corrupt symbol table\n", __func__);
12902f22b3ffSMatthew D Fleming 			return (ENOENT);
1291a4f67738SDoug Rabson 		}
1292fe3db7c7SDoug Rabson 
1293fe3db7c7SDoug Rabson 		symp = ef->symtab + symnum;
1294fe3db7c7SDoug Rabson 		if (symp->st_name == 0) {
12952f22b3ffSMatthew D Fleming 			printf("%s: corrupt symbol table\n", __func__);
12962f22b3ffSMatthew D Fleming 			return (ENOENT);
1297fe3db7c7SDoug Rabson 		}
1298fe3db7c7SDoug Rabson 
1299fe3db7c7SDoug Rabson 		strp = ef->strtab + symp->st_name;
1300fe3db7c7SDoug Rabson 
1301fe3db7c7SDoug Rabson 		if (strcmp(name, strp) == 0) {
1302fe3db7c7SDoug Rabson 			if (symp->st_shndx != SHN_UNDEF ||
1303fe3db7c7SDoug Rabson 			    (symp->st_value != 0 &&
13047035cf14SKonstantin Belousov 			    (ELF_ST_TYPE(symp->st_info) == STT_FUNC ||
13057035cf14SKonstantin Belousov 			    ELF_ST_TYPE(symp->st_info) == STT_GNU_IFUNC))) {
1306d254af07SMatthew Dillon 				*sym = (c_linker_sym_t) symp;
13072f22b3ffSMatthew D Fleming 				return (0);
13082f22b3ffSMatthew D Fleming 			}
13092f22b3ffSMatthew D Fleming 			return (ENOENT);
1310fe3db7c7SDoug Rabson 		}
1311fe3db7c7SDoug Rabson 
1312fe3db7c7SDoug Rabson 		symnum = ef->chains[symnum];
1313a4f67738SDoug Rabson 	}
1314a4f67738SDoug Rabson 
13152d636ab0SPeter Wemm 	/* If we have not found it, look at the full table (if loaded) */
13162d636ab0SPeter Wemm 	if (ef->symtab == ef->ddbsymtab)
13172f22b3ffSMatthew D Fleming 		return (ENOENT);
13182d636ab0SPeter Wemm 
13192d636ab0SPeter Wemm 	/* Exhaustive search */
13202d636ab0SPeter Wemm 	for (i = 0, symp = ef->ddbsymtab; i < ef->ddbsymcnt; i++, symp++) {
13212d636ab0SPeter Wemm 		strp = ef->ddbstrtab + symp->st_name;
13222d636ab0SPeter Wemm 		if (strcmp(name, strp) == 0) {
13232d636ab0SPeter Wemm 			if (symp->st_shndx != SHN_UNDEF ||
13242d636ab0SPeter Wemm 			    (symp->st_value != 0 &&
13257035cf14SKonstantin Belousov 			    (ELF_ST_TYPE(symp->st_info) == STT_FUNC ||
13267035cf14SKonstantin Belousov 			    ELF_ST_TYPE(symp->st_info) == STT_GNU_IFUNC))) {
1327d254af07SMatthew Dillon 				*sym = (c_linker_sym_t) symp;
13282f22b3ffSMatthew D Fleming 				return (0);
13292f22b3ffSMatthew D Fleming 			}
13302f22b3ffSMatthew D Fleming 			return (ENOENT);
13312d636ab0SPeter Wemm 		}
13322d636ab0SPeter Wemm 	}
13332d636ab0SPeter Wemm 
13342f22b3ffSMatthew D Fleming 	return (ENOENT);
1335a4f67738SDoug Rabson }
1336a4f67738SDoug Rabson 
1337de78ca7eSPeter Wemm static int
13382f22b3ffSMatthew D Fleming link_elf_symbol_values(linker_file_t lf, c_linker_sym_t sym,
13392f22b3ffSMatthew D Fleming     linker_symval_t *symval)
1340a4f67738SDoug Rabson {
13417035cf14SKonstantin Belousov 	elf_file_t ef;
13427035cf14SKonstantin Belousov 	const Elf_Sym *es;
13437035cf14SKonstantin Belousov 	caddr_t val;
1344a4f67738SDoug Rabson 
13457035cf14SKonstantin Belousov 	ef = (elf_file_t)lf;
13467035cf14SKonstantin Belousov 	es = (const Elf_Sym *)sym;
13475cf87418SMarcel Moolenaar 	if (es >= ef->symtab && es < (ef->symtab + ef->nchains)) {
1348a4f67738SDoug Rabson 		symval->name = ef->strtab + es->st_name;
13497035cf14SKonstantin Belousov 		val = (caddr_t)ef->address + es->st_value;
13507035cf14SKonstantin Belousov 		if (ELF_ST_TYPE(es->st_info) == STT_GNU_IFUNC)
13517035cf14SKonstantin Belousov 			val = ((caddr_t (*)(void))val)();
13527035cf14SKonstantin Belousov 		symval->value = val;
1353a4f67738SDoug Rabson 		symval->size = es->st_size;
13542f22b3ffSMatthew D Fleming 		return (0);
1355a4f67738SDoug Rabson 	}
13562d636ab0SPeter Wemm 	if (ef->symtab == ef->ddbsymtab)
13572f22b3ffSMatthew D Fleming 		return (ENOENT);
13585cf87418SMarcel Moolenaar 	if (es >= ef->ddbsymtab && es < (ef->ddbsymtab + ef->ddbsymcnt)) {
13592d636ab0SPeter Wemm 		symval->name = ef->ddbstrtab + es->st_name;
13607035cf14SKonstantin Belousov 		val = (caddr_t)ef->address + es->st_value;
13617035cf14SKonstantin Belousov 		if (ELF_ST_TYPE(es->st_info) == STT_GNU_IFUNC)
13627035cf14SKonstantin Belousov 			val = ((caddr_t (*)(void))val)();
13637035cf14SKonstantin Belousov 		symval->value = val;
13642d636ab0SPeter Wemm 		symval->size = es->st_size;
13652f22b3ffSMatthew D Fleming 		return (0);
13662d636ab0SPeter Wemm 	}
13672f22b3ffSMatthew D Fleming 	return (ENOENT);
13682d636ab0SPeter Wemm }
1369a4f67738SDoug Rabson 
1370a4f67738SDoug Rabson static int
1371a4f67738SDoug Rabson link_elf_search_symbol(linker_file_t lf, caddr_t value,
1372d254af07SMatthew Dillon     c_linker_sym_t *sym, long *diffp)
1373a4f67738SDoug Rabson {
1374326e27d8SDoug Rabson 	elf_file_t ef = (elf_file_t) lf;
1375586453feSBruce Evans 	u_long off = (uintptr_t) (void *) value;
1376a4f67738SDoug Rabson 	u_long diff = off;
1377586453feSBruce Evans 	u_long st_value;
1378fe3db7c7SDoug Rabson 	const Elf_Sym* es;
1379b85f65afSPedro F. Giffuni 	const Elf_Sym* best = NULL;
1380a4f67738SDoug Rabson 	int i;
1381a4f67738SDoug Rabson 
13822d636ab0SPeter Wemm 	for (i = 0, es = ef->ddbsymtab; i < ef->ddbsymcnt; i++, es++) {
1383a4f67738SDoug Rabson 		if (es->st_name == 0)
1384a4f67738SDoug Rabson 			continue;
1385586453feSBruce Evans 		st_value = es->st_value + (uintptr_t) (void *) ef->address;
1386b5abfb70SPeter Wemm 		if (off >= st_value) {
1387b5abfb70SPeter Wemm 			if (off - st_value < diff) {
1388b5abfb70SPeter Wemm 				diff = off - st_value;
1389a4f67738SDoug Rabson 				best = es;
1390a4f67738SDoug Rabson 				if (diff == 0)
1391a4f67738SDoug Rabson 					break;
1392b5abfb70SPeter Wemm 			} else if (off - st_value == diff) {
1393a4f67738SDoug Rabson 				best = es;
1394a4f67738SDoug Rabson 			}
1395a4f67738SDoug Rabson 		}
1396a4f67738SDoug Rabson 	}
1397b85f65afSPedro F. Giffuni 	if (best == NULL)
1398a4f67738SDoug Rabson 		*diffp = off;
1399a4f67738SDoug Rabson 	else
1400a4f67738SDoug Rabson 		*diffp = diff;
1401d254af07SMatthew Dillon 	*sym = (c_linker_sym_t) best;
1402a4f67738SDoug Rabson 
14032f22b3ffSMatthew D Fleming 	return (0);
1404a4f67738SDoug Rabson }
1405f41325dbSPeter Wemm 
1406f41325dbSPeter Wemm /*
1407f41325dbSPeter Wemm  * Look up a linker set on an ELF system.
1408f41325dbSPeter Wemm  */
1409f41325dbSPeter Wemm static int
1410f41325dbSPeter Wemm link_elf_lookup_set(linker_file_t lf, const char *name,
1411f41325dbSPeter Wemm     void ***startp, void ***stopp, int *countp)
1412f41325dbSPeter Wemm {
1413f41325dbSPeter Wemm 	c_linker_sym_t sym;
1414f41325dbSPeter Wemm 	linker_symval_t symval;
1415f41325dbSPeter Wemm 	char *setsym;
1416f41325dbSPeter Wemm 	void **start, **stop;
1417f41325dbSPeter Wemm 	int len, error = 0, count;
1418f41325dbSPeter Wemm 
1419f41325dbSPeter Wemm 	len = strlen(name) + sizeof("__start_set_"); /* sizeof includes \0 */
1420a163d034SWarner Losh 	setsym = malloc(len, M_LINKER, M_WAITOK);
1421f41325dbSPeter Wemm 
1422f41325dbSPeter Wemm 	/* get address of first entry */
1423f41325dbSPeter Wemm 	snprintf(setsym, len, "%s%s", "__start_set_", name);
1424f41325dbSPeter Wemm 	error = link_elf_lookup_symbol(lf, setsym, &sym);
14252f22b3ffSMatthew D Fleming 	if (error != 0)
1426f41325dbSPeter Wemm 		goto out;
1427f41325dbSPeter Wemm 	link_elf_symbol_values(lf, sym, &symval);
1428f41325dbSPeter Wemm 	if (symval.value == 0) {
1429f41325dbSPeter Wemm 		error = ESRCH;
1430f41325dbSPeter Wemm 		goto out;
1431f41325dbSPeter Wemm 	}
1432f41325dbSPeter Wemm 	start = (void **)symval.value;
1433f41325dbSPeter Wemm 
1434f41325dbSPeter Wemm 	/* get address of last entry */
1435f41325dbSPeter Wemm 	snprintf(setsym, len, "%s%s", "__stop_set_", name);
1436f41325dbSPeter Wemm 	error = link_elf_lookup_symbol(lf, setsym, &sym);
14372f22b3ffSMatthew D Fleming 	if (error != 0)
1438f41325dbSPeter Wemm 		goto out;
1439f41325dbSPeter Wemm 	link_elf_symbol_values(lf, sym, &symval);
1440f41325dbSPeter Wemm 	if (symval.value == 0) {
1441f41325dbSPeter Wemm 		error = ESRCH;
1442f41325dbSPeter Wemm 		goto out;
1443f41325dbSPeter Wemm 	}
1444f41325dbSPeter Wemm 	stop = (void **)symval.value;
1445f41325dbSPeter Wemm 
1446f41325dbSPeter Wemm 	/* and the number of entries */
1447f41325dbSPeter Wemm 	count = stop - start;
1448f41325dbSPeter Wemm 
1449f41325dbSPeter Wemm 	/* and copy out */
14502f22b3ffSMatthew D Fleming 	if (startp != NULL)
1451f41325dbSPeter Wemm 		*startp = start;
14522f22b3ffSMatthew D Fleming 	if (stopp != NULL)
1453f41325dbSPeter Wemm 		*stopp = stop;
14542f22b3ffSMatthew D Fleming 	if (countp != NULL)
1455f41325dbSPeter Wemm 		*countp = count;
1456f41325dbSPeter Wemm 
1457f41325dbSPeter Wemm out:
1458f41325dbSPeter Wemm 	free(setsym, M_LINKER);
14592f22b3ffSMatthew D Fleming 	return (error);
1460f41325dbSPeter Wemm }
1461bb9fe9ddSBrian Feldman 
1462bb9fe9ddSBrian Feldman static int
1463bb9fe9ddSBrian Feldman link_elf_each_function_name(linker_file_t file,
14642f22b3ffSMatthew D Fleming   int (*callback)(const char *, void *), void *opaque)
14652f22b3ffSMatthew D Fleming {
1466bb9fe9ddSBrian Feldman 	elf_file_t ef = (elf_file_t)file;
1467bb9fe9ddSBrian Feldman 	const Elf_Sym *symp;
1468bb9fe9ddSBrian Feldman 	int i, error;
1469bb9fe9ddSBrian Feldman 
1470bb9fe9ddSBrian Feldman 	/* Exhaustive search */
1471bb9fe9ddSBrian Feldman 	for (i = 0, symp = ef->ddbsymtab; i < ef->ddbsymcnt; i++, symp++) {
1472bb9fe9ddSBrian Feldman 		if (symp->st_value != 0 &&
14737035cf14SKonstantin Belousov 		    (ELF_ST_TYPE(symp->st_info) == STT_FUNC ||
14747035cf14SKonstantin Belousov 		    ELF_ST_TYPE(symp->st_info) == STT_GNU_IFUNC)) {
1475bb9fe9ddSBrian Feldman 			error = callback(ef->ddbstrtab + symp->st_name, opaque);
14762f22b3ffSMatthew D Fleming 			if (error != 0)
1477bb9fe9ddSBrian Feldman 				return (error);
1478bb9fe9ddSBrian Feldman 		}
1479bb9fe9ddSBrian Feldman 	}
1480bb9fe9ddSBrian Feldman 	return (0);
1481bb9fe9ddSBrian Feldman }
148284201059SMarcel Moolenaar 
1483a2024a3eSJohn Birrell static int
1484a2024a3eSJohn Birrell link_elf_each_function_nameval(linker_file_t file,
1485a2024a3eSJohn Birrell     linker_function_nameval_callback_t callback, void *opaque)
1486a2024a3eSJohn Birrell {
1487a2024a3eSJohn Birrell 	linker_symval_t symval;
1488a2024a3eSJohn Birrell 	elf_file_t ef = (elf_file_t)file;
1489a2024a3eSJohn Birrell 	const Elf_Sym* symp;
1490a2024a3eSJohn Birrell 	int i, error;
1491a2024a3eSJohn Birrell 
1492a2024a3eSJohn Birrell 	/* Exhaustive search */
1493a2024a3eSJohn Birrell 	for (i = 0, symp = ef->ddbsymtab; i < ef->ddbsymcnt; i++, symp++) {
1494a2024a3eSJohn Birrell 		if (symp->st_value != 0 &&
14957035cf14SKonstantin Belousov 		    (ELF_ST_TYPE(symp->st_info) == STT_FUNC ||
14967035cf14SKonstantin Belousov 		    ELF_ST_TYPE(symp->st_info) == STT_GNU_IFUNC)) {
14972f22b3ffSMatthew D Fleming 			error = link_elf_symbol_values(file,
14982f22b3ffSMatthew D Fleming 			    (c_linker_sym_t) symp, &symval);
14992f22b3ffSMatthew D Fleming 			if (error != 0)
1500a2024a3eSJohn Birrell 				return (error);
1501a2024a3eSJohn Birrell 			error = callback(file, i, &symval, opaque);
15022f22b3ffSMatthew D Fleming 			if (error != 0)
1503a2024a3eSJohn Birrell 				return (error);
1504a2024a3eSJohn Birrell 		}
1505a2024a3eSJohn Birrell 	}
1506a2024a3eSJohn Birrell 	return (0);
1507a2024a3eSJohn Birrell }
1508a2024a3eSJohn Birrell 
1509169d513cSJake Burkholder const Elf_Sym *
1510757686b1SMarcel Moolenaar elf_get_sym(linker_file_t lf, Elf_Size symidx)
1511169d513cSJake Burkholder {
1512169d513cSJake Burkholder 	elf_file_t ef = (elf_file_t)lf;
1513169d513cSJake Burkholder 
1514169d513cSJake Burkholder 	if (symidx >= ef->nchains)
1515169d513cSJake Burkholder 		return (NULL);
1516169d513cSJake Burkholder 	return (ef->symtab + symidx);
1517169d513cSJake Burkholder }
1518169d513cSJake Burkholder 
151947f75012SMarcel Moolenaar const char *
1520757686b1SMarcel Moolenaar elf_get_symname(linker_file_t lf, Elf_Size symidx)
152147f75012SMarcel Moolenaar {
152247f75012SMarcel Moolenaar 	elf_file_t ef = (elf_file_t)lf;
152347f75012SMarcel Moolenaar 	const Elf_Sym *sym;
152447f75012SMarcel Moolenaar 
152547f75012SMarcel Moolenaar 	if (symidx >= ef->nchains)
152647f75012SMarcel Moolenaar 		return (NULL);
152747f75012SMarcel Moolenaar 	sym = ef->symtab + symidx;
152847f75012SMarcel Moolenaar 	return (ef->strtab + sym->st_name);
152947f75012SMarcel Moolenaar }
153047f75012SMarcel Moolenaar 
1531d297ad16SMarcel Moolenaar /*
1532d297ad16SMarcel Moolenaar  * Symbol lookup function that can be used when the symbol index is known (ie
1533d297ad16SMarcel Moolenaar  * in relocations). It uses the symbol index instead of doing a fully fledged
1534d297ad16SMarcel Moolenaar  * hash table based lookup when such is valid. For example for local symbols.
1535d297ad16SMarcel Moolenaar  * This is not only more efficient, it's also more correct. It's not always
1536d297ad16SMarcel Moolenaar  * the case that the symbol can be found through the hash table.
1537d297ad16SMarcel Moolenaar  */
1538cff8c6f2SKonstantin Belousov static int
1539cff8c6f2SKonstantin Belousov elf_lookup(linker_file_t lf, Elf_Size symidx, int deps, Elf_Addr *res)
1540d297ad16SMarcel Moolenaar {
1541d297ad16SMarcel Moolenaar 	elf_file_t ef = (elf_file_t)lf;
1542d297ad16SMarcel Moolenaar 	const Elf_Sym *sym;
1543d297ad16SMarcel Moolenaar 	const char *symbol;
154447813f5dSMikolaj Golub 	Elf_Addr addr, start, base;
1545d297ad16SMarcel Moolenaar 
1546d297ad16SMarcel Moolenaar 	/* Don't even try to lookup the symbol if the index is bogus. */
1547cff8c6f2SKonstantin Belousov 	if (symidx >= ef->nchains) {
1548cff8c6f2SKonstantin Belousov 		*res = 0;
1549cff8c6f2SKonstantin Belousov 		return (EINVAL);
1550cff8c6f2SKonstantin Belousov 	}
1551d297ad16SMarcel Moolenaar 
1552d297ad16SMarcel Moolenaar 	sym = ef->symtab + symidx;
1553d297ad16SMarcel Moolenaar 
1554d297ad16SMarcel Moolenaar 	/*
1555d297ad16SMarcel Moolenaar 	 * Don't do a full lookup when the symbol is local. It may even
1556d297ad16SMarcel Moolenaar 	 * fail because it may not be found through the hash table.
1557d297ad16SMarcel Moolenaar 	 */
1558d297ad16SMarcel Moolenaar 	if (ELF_ST_BIND(sym->st_info) == STB_LOCAL) {
1559d297ad16SMarcel Moolenaar 		/* Force lookup failure when we have an insanity. */
1560cff8c6f2SKonstantin Belousov 		if (sym->st_shndx == SHN_UNDEF || sym->st_value == 0) {
1561cff8c6f2SKonstantin Belousov 			*res = 0;
1562cff8c6f2SKonstantin Belousov 			return (EINVAL);
1563cff8c6f2SKonstantin Belousov 		}
1564cff8c6f2SKonstantin Belousov 		*res = ((Elf_Addr)ef->address + sym->st_value);
1565d297ad16SMarcel Moolenaar 		return (0);
1566d297ad16SMarcel Moolenaar 	}
1567d297ad16SMarcel Moolenaar 
1568d297ad16SMarcel Moolenaar 	/*
1569d297ad16SMarcel Moolenaar 	 * XXX we can avoid doing a hash table based lookup for global
1570d297ad16SMarcel Moolenaar 	 * symbols as well. This however is not always valid, so we'll
1571d297ad16SMarcel Moolenaar 	 * just do it the hard way for now. Performance tweaks can
1572d297ad16SMarcel Moolenaar 	 * always be added.
1573d297ad16SMarcel Moolenaar 	 */
1574d297ad16SMarcel Moolenaar 
1575d297ad16SMarcel Moolenaar 	symbol = ef->strtab + sym->st_name;
1576d297ad16SMarcel Moolenaar 
1577d297ad16SMarcel Moolenaar 	/* Force a lookup failure if the symbol name is bogus. */
1578cff8c6f2SKonstantin Belousov 	if (*symbol == 0) {
1579cff8c6f2SKonstantin Belousov 		*res = 0;
1580cff8c6f2SKonstantin Belousov 		return (EINVAL);
1581cff8c6f2SKonstantin Belousov 	}
1582d297ad16SMarcel Moolenaar 
158347813f5dSMikolaj Golub 	addr = ((Elf_Addr)linker_file_lookup_symbol(lf, symbol, deps));
1584e8e0fac5SMark Johnston 	if (addr == 0 && ELF_ST_BIND(sym->st_info) != STB_WEAK) {
1585e8e0fac5SMark Johnston 		*res = 0;
1586e8e0fac5SMark Johnston 		return (EINVAL);
1587e8e0fac5SMark Johnston 	}
158847813f5dSMikolaj Golub 
158947813f5dSMikolaj Golub 	if (elf_set_find(&set_pcpu_list, addr, &start, &base))
159047813f5dSMikolaj Golub 		addr = addr - start + base;
159147813f5dSMikolaj Golub #ifdef VIMAGE
159247813f5dSMikolaj Golub 	else if (elf_set_find(&set_vnet_list, addr, &start, &base))
159347813f5dSMikolaj Golub 		addr = addr - start + base;
159447813f5dSMikolaj Golub #endif
1595cff8c6f2SKonstantin Belousov 	*res = addr;
1596cff8c6f2SKonstantin Belousov 	return (0);
1597d297ad16SMarcel Moolenaar }
15987251b4bfSJake Burkholder 
15997251b4bfSJake Burkholder static void
16007251b4bfSJake Burkholder link_elf_reloc_local(linker_file_t lf)
16017251b4bfSJake Burkholder {
16027251b4bfSJake Burkholder 	const Elf_Rel *rellim;
16037251b4bfSJake Burkholder 	const Elf_Rel *rel;
16047251b4bfSJake Burkholder 	const Elf_Rela *relalim;
16057251b4bfSJake Burkholder 	const Elf_Rela *rela;
16067251b4bfSJake Burkholder 	elf_file_t ef = (elf_file_t)lf;
16077251b4bfSJake Burkholder 
16087251b4bfSJake Burkholder 	/* Perform relocations without addend if there are any: */
16097251b4bfSJake Burkholder 	if ((rel = ef->rel) != NULL) {
16107251b4bfSJake Burkholder 		rellim = (const Elf_Rel *)((const char *)ef->rel + ef->relsize);
16117251b4bfSJake Burkholder 		while (rel < rellim) {
16122f22b3ffSMatthew D Fleming 			elf_reloc_local(lf, (Elf_Addr)ef->address, rel,
16132f22b3ffSMatthew D Fleming 			    ELF_RELOC_REL, elf_lookup);
16147251b4bfSJake Burkholder 			rel++;
16157251b4bfSJake Burkholder 		}
16167251b4bfSJake Burkholder 	}
16177251b4bfSJake Burkholder 
16187251b4bfSJake Burkholder 	/* Perform relocations with addend if there are any: */
16197251b4bfSJake Burkholder 	if ((rela = ef->rela) != NULL) {
16202f22b3ffSMatthew D Fleming 		relalim = (const Elf_Rela *)
16212f22b3ffSMatthew D Fleming 		    ((const char *)ef->rela + ef->relasize);
16227251b4bfSJake Burkholder 		while (rela < relalim) {
16232f22b3ffSMatthew D Fleming 			elf_reloc_local(lf, (Elf_Addr)ef->address, rela,
16242f22b3ffSMatthew D Fleming 			    ELF_RELOC_RELA, elf_lookup);
16257251b4bfSJake Burkholder 			rela++;
16267251b4bfSJake Burkholder 		}
16277251b4bfSJake Burkholder 	}
16287251b4bfSJake Burkholder }
162900a5db46SStacey Son 
163000a5db46SStacey Son static long
163100a5db46SStacey Son link_elf_symtab_get(linker_file_t lf, const Elf_Sym **symtab)
163200a5db46SStacey Son {
163300a5db46SStacey Son 	elf_file_t ef = (elf_file_t)lf;
163400a5db46SStacey Son 
163500a5db46SStacey Son 	*symtab = ef->ddbsymtab;
163600a5db46SStacey Son 
163700a5db46SStacey Son 	if (*symtab == NULL)
163800a5db46SStacey Son 		return (0);
163900a5db46SStacey Son 
164000a5db46SStacey Son 	return (ef->ddbsymcnt);
164100a5db46SStacey Son }
164200a5db46SStacey Son 
164300a5db46SStacey Son static long
164400a5db46SStacey Son link_elf_strtab_get(linker_file_t lf, caddr_t *strtab)
164500a5db46SStacey Son {
164600a5db46SStacey Son 	elf_file_t ef = (elf_file_t)lf;
164700a5db46SStacey Son 
164800a5db46SStacey Son 	*strtab = ef->ddbstrtab;
164900a5db46SStacey Son 
165000a5db46SStacey Son 	if (*strtab == NULL)
165100a5db46SStacey Son 		return (0);
165200a5db46SStacey Son 
165300a5db46SStacey Son 	return (ef->ddbstrcnt);
165400a5db46SStacey Son }
16557035cf14SKonstantin Belousov 
16567035cf14SKonstantin Belousov #if defined(__i386__) || defined(__amd64__)
1657*36716fe2SMark Johnston /*
1658*36716fe2SMark Johnston  * Use this lookup routine when performing relocations early during boot.
1659*36716fe2SMark Johnston  * The generic lookup routine depends on kobj, which is not initialized
1660*36716fe2SMark Johnston  * at that point.
1661*36716fe2SMark Johnston  */
1662*36716fe2SMark Johnston static int
1663*36716fe2SMark Johnston elf_lookup_ifunc(linker_file_t lf, Elf_Size symidx, int deps __unused,
1664*36716fe2SMark Johnston     Elf_Addr *res)
1665*36716fe2SMark Johnston {
1666*36716fe2SMark Johnston 	elf_file_t ef;
1667*36716fe2SMark Johnston 	const Elf_Sym *symp;
1668*36716fe2SMark Johnston 	caddr_t val;
1669*36716fe2SMark Johnston 
1670*36716fe2SMark Johnston 	ef = (elf_file_t)lf;
1671*36716fe2SMark Johnston 	symp = ef->symtab + symidx;
1672*36716fe2SMark Johnston 	if (ELF_ST_TYPE(symp->st_info) == STT_GNU_IFUNC) {
1673*36716fe2SMark Johnston 		val = (caddr_t)ef->address + symp->st_value;
1674*36716fe2SMark Johnston 		*res = ((Elf_Addr (*)(void))val)();
1675*36716fe2SMark Johnston 		return (0);
1676*36716fe2SMark Johnston 	}
1677*36716fe2SMark Johnston 	return (ENOENT);
1678*36716fe2SMark Johnston }
1679*36716fe2SMark Johnston 
16807035cf14SKonstantin Belousov void
16817035cf14SKonstantin Belousov link_elf_ireloc(caddr_t kmdp)
16827035cf14SKonstantin Belousov {
16837035cf14SKonstantin Belousov 	struct elf_file eff;
16847035cf14SKonstantin Belousov 	elf_file_t ef;
168555c9d75eSKonstantin Belousov 	volatile char *c;
168655c9d75eSKonstantin Belousov 	size_t i;
16877035cf14SKonstantin Belousov 
16887035cf14SKonstantin Belousov 	ef = &eff;
168955c9d75eSKonstantin Belousov 
169055c9d75eSKonstantin Belousov 	/* Do not use bzero/memset before ireloc is done. */
169155c9d75eSKonstantin Belousov 	for (c = (char *)ef, i = 0; i < sizeof(*ef); i++)
169255c9d75eSKonstantin Belousov 		c[i] = 0;
169355c9d75eSKonstantin Belousov 
16947035cf14SKonstantin Belousov 	ef->modptr = kmdp;
16957035cf14SKonstantin Belousov 	ef->dynamic = (Elf_Dyn *)&_DYNAMIC;
16967035cf14SKonstantin Belousov 	parse_dynamic(ef);
16977035cf14SKonstantin Belousov 	ef->address = 0;
16987035cf14SKonstantin Belousov 	link_elf_preload_parse_symbols(ef);
1699*36716fe2SMark Johnston 	relocate_file1(ef, elf_lookup_ifunc, elf_reloc, true);
17007035cf14SKonstantin Belousov }
17017035cf14SKonstantin Belousov #endif
1702