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kobj_machdep.c revision 1.1.20.1
      1  1.1.20.1  yamt /*	$NetBSD: kobj_machdep.c,v 1.1.20.1 2008/05/18 12:31:34 yamt Exp $	*/
      2       1.1    ad 
      3       1.1    ad /*-
      4       1.1    ad  * Copyright (c) 2008 The NetBSD Foundation, Inc.
      5       1.1    ad  * All rights reserved.
      6       1.1    ad  *
      7       1.1    ad  * Redistribution and use in source and binary forms, with or without
      8       1.1    ad  * modification, are permitted provided that the following conditions
      9       1.1    ad  * are met:
     10       1.1    ad  * 1. Redistributions of source code must retain the above copyright
     11       1.1    ad  *    notice, this list of conditions and the following disclaimer.
     12       1.1    ad  * 2. Redistributions in binary form must reproduce the above copyright
     13       1.1    ad  *    notice, this list of conditions and the following disclaimer in the
     14       1.1    ad  *    documentation and/or other materials provided with the distribution.
     15       1.1    ad  *
     16       1.1    ad  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     17       1.1    ad  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     18       1.1    ad  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     19       1.1    ad  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     20       1.1    ad  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     21       1.1    ad  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     22       1.1    ad  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     23       1.1    ad  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     24       1.1    ad  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     25       1.1    ad  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     26       1.1    ad  * POSSIBILITY OF SUCH DAMAGE.
     27       1.1    ad  */
     28       1.1    ad 
     29       1.1    ad /*-
     30       1.1    ad  * Copyright 1996-1998 John D. Polstra.
     31       1.1    ad  * All rights reserved.
     32       1.1    ad  *
     33       1.1    ad  * Redistribution and use in source and binary forms, with or without
     34       1.1    ad  * modification, are permitted provided that the following conditions
     35       1.1    ad  * are met:
     36       1.1    ad  * 1. Redistributions of source code must retain the above copyright
     37       1.1    ad  *    notice, this list of conditions and the following disclaimer.
     38       1.1    ad  * 2. Redistributions in binary form must reproduce the above copyright
     39       1.1    ad  *    notice, this list of conditions and the following disclaimer in the
     40       1.1    ad  *    documentation and/or other materials provided with the distribution.
     41       1.1    ad  *
     42       1.1    ad  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     43       1.1    ad  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     44       1.1    ad  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     45       1.1    ad  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     46       1.1    ad  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     47       1.1    ad  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     48       1.1    ad  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     49       1.1    ad  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     50       1.1    ad  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     51       1.1    ad  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     52       1.1    ad  */
     53       1.1    ad 
     54       1.1    ad #include <sys/cdefs.h>
     55  1.1.20.1  yamt __KERNEL_RCSID(0, "$NetBSD: kobj_machdep.c,v 1.1.20.1 2008/05/18 12:31:34 yamt Exp $");
     56       1.1    ad 
     57       1.1    ad #define	ELFSIZE		ARCH_ELFSIZE
     58       1.1    ad 
     59       1.1    ad #include <sys/param.h>
     60       1.1    ad #include <sys/systm.h>
     61       1.1    ad #include <sys/kobj.h>
     62       1.1    ad #include <sys/exec.h>
     63       1.1    ad #include <sys/exec_elf.h>
     64       1.1    ad 
     65       1.1    ad #include <arm/cpufunc.h>
     66       1.1    ad 
     67       1.1    ad int
     68       1.1    ad kobj_reloc(kobj_t ko, uintptr_t relocbase, const void *data,
     69       1.1    ad 	   bool isrela, bool local)
     70       1.1    ad {
     71       1.1    ad 	Elf_Addr *where;
     72       1.1    ad 	Elf_Addr addr;
     73       1.1    ad 	Elf_Addr addend;
     74       1.1    ad 	Elf_Word rtype, symidx;
     75       1.1    ad 	const Elf_Rel *rel;
     76       1.1    ad 	const Elf_Rela *rela;
     77       1.1    ad 
     78       1.1    ad 	if (isrela) {
     79       1.1    ad 		rela = (const Elf_Rela *)data;
     80       1.1    ad 		where = (Elf_Addr *) (relocbase + rela->r_offset);
     81       1.1    ad 		addend = rela->r_addend;
     82       1.1    ad 		rtype = ELF_R_TYPE(rela->r_info);
     83       1.1    ad 		symidx = ELF_R_SYM(rela->r_info);
     84       1.1    ad 	} else {
     85       1.1    ad 		rel = (const Elf_Rel *)data;
     86       1.1    ad 		where = (Elf_Addr *) (relocbase + rel->r_offset);
     87       1.1    ad 		addend = *where;
     88       1.1    ad 		rtype = ELF_R_TYPE(rel->r_info);
     89       1.1    ad 		symidx = ELF_R_SYM(rel->r_info);
     90       1.1    ad 	}
     91       1.1    ad 
     92       1.1    ad 	switch (rtype) {
     93       1.1    ad 	case R_ARM_NONE:	/* none */
     94       1.1    ad 		break;
     95       1.1    ad 
     96       1.1    ad 	case R_ARM_ABS32:
     97       1.1    ad 		addr = kobj_sym_lookup(ko, symidx);
     98       1.1    ad 		if (addr == 0)
     99       1.1    ad 			return -1;
    100       1.1    ad 		if (*where != addr)
    101       1.1    ad 			*where = addr;
    102       1.1    ad 
    103       1.1    ad 		break;
    104       1.1    ad 
    105       1.1    ad 	case R_ARM_COPY:	/* none */
    106       1.1    ad 		/*
    107       1.1    ad 		 * There shouldn't be copy relocations in kernel
    108       1.1    ad 		 * objects.
    109       1.1    ad 		 */
    110       1.1    ad 		printf("kobj_reloc: unexpected R_COPY relocation\n");
    111       1.1    ad 		return -1;
    112       1.1    ad 
    113       1.1    ad 	case R_ARM_JUMP_SLOT:
    114       1.1    ad 		addr = kobj_sym_lookup(ko, symidx);
    115       1.1    ad 		if (addr) {
    116       1.1    ad 			*where = addr;
    117       1.1    ad 			return 0;
    118       1.1    ad 		}
    119       1.1    ad 		return -1;
    120       1.1    ad 
    121       1.1    ad 	case R_ARM_RELATIVE:	/* A + B */
    122       1.1    ad 		addr = relocbase + addend;
    123       1.1    ad 		if (*where != addr)
    124       1.1    ad 			*where = addr;
    125       1.1    ad 		break;
    126       1.1    ad 
    127       1.1    ad 	default:
    128       1.1    ad 		printf("kobj_reloc: unexpected relocation type %d\n", rtype);
    129       1.1    ad 		return -1;
    130       1.1    ad 	}
    131       1.1    ad 	return 0;
    132       1.1    ad }
    133       1.1    ad 
    134       1.1    ad int
    135       1.1    ad kobj_machdep(kobj_t ko, void *base, size_t size, bool load)
    136       1.1    ad {
    137       1.1    ad 
    138       1.1    ad 	if (load) {
    139       1.1    ad 		cpu_idcache_wbinv_all();
    140       1.1    ad 		cpu_tlb_flushID();
    141       1.1    ad 	}
    142       1.1    ad 
    143       1.1    ad 	return 0;
    144       1.1    ad }
    145