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