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      1 /*	$NetBSD: kobj_machdep.c,v 1.8 2023/04/28 07:33:56 skrll 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 #include <sys/cdefs.h>
     30 __KERNEL_RCSID(0, "$NetBSD: kobj_machdep.c,v 1.8 2023/04/28 07:33:56 skrll Exp $");
     31 
     32 #define	ELFSIZE		ARCH_ELFSIZE
     33 
     34 #include <sys/param.h>
     35 #include <sys/systm.h>
     36 #include <sys/kobj.h>
     37 #include <sys/exec.h>
     38 #include <sys/exec_elf.h>
     39 
     40 #include <sh3/cache.h>
     41 
     42 int
     43 kobj_reloc(kobj_t ko, uintptr_t relocbase, const void *data,
     44 	   bool isrela, bool local)
     45 {
     46 	const Elf_Rela *rela;
     47 	Elf_Addr *where;
     48 	uintptr_t addr, tmp;
     49 	int symidx, rtype;
     50 	int error;
     51 
     52 	if (!isrela) {
     53 		printf("kobj_reloc: support only RELA relocations\n");
     54 		return -1;
     55 	}
     56 
     57 	rela = data;
     58 	where = (Elf_Addr *)(relocbase + rela->r_offset);
     59 	symidx = ELF_R_SYM(rela->r_info);
     60 	rtype = ELF_R_TYPE(rela->r_info);
     61 
     62 	const Elf_Sym *sym = kobj_symbol(ko, symidx);
     63 
     64 	if (!local && ELF_ST_BIND(sym->st_info) == STB_LOCAL) {
     65 		return 0;
     66 	}
     67 
     68 	switch (rtype) {
     69 	case R_TYPE(NONE):
     70 		break;
     71 
     72 	case R_TYPE(DIR32):
     73 	case R_TYPE(REL32):
     74 		error = kobj_sym_lookup(ko, symidx, &addr);
     75 		if (error)
     76 			return -1;
     77 
     78 		tmp = (Elf_Addr)(addr + *where + rela->r_addend);
     79 		if (rtype == R_TYPE(REL32))
     80 			tmp -= (uintptr_t)where;
     81 		*where = tmp;
     82 		break;
     83 
     84 	default:
     85 		printf("kobj_reloc: unexpected reloc type %d\n", (int)rtype);
     86 		return -1;
     87 	}
     88 
     89 	return 0;
     90 }
     91 
     92 int
     93 kobj_machdep(kobj_t ko, void *base, size_t size, bool load)
     94 {
     95 
     96 	if (load)
     97 		sh_icache_sync_range((vaddr_t)base, size);
     98 
     99 	return 0;
    100 }
    101