Home | History | Annotate | Line # | Download | only in vax 
      1 /*      $NetBSD: kobj_machdep.c,v 1.2 2023/04/28 07:33:57 skrll Exp $   */
      2 
      3 /*-
      4  * Copyright (c) 2018 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Anders Magnusson.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #include <sys/param.h>
     33 #include <sys/kobj.h>
     34 #include <sys/exec.h>
     35 #include <sys/exec_elf.h>
     36 
     37 /*
     38  * VAX kernel uses two relocations;
     39  *	- R_VAX_PC32 which is PC relative offset
     40  *	- R_VAX_32 which is an absolute symbol offset
     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 = (const Elf_Rela *)data;
     47 	Elf_Word rtype = ELF_R_TYPE(rela->r_info);
     48 	Elf_Word symidx = ELF_R_SYM(rela->r_info);
     49 	Elf_Addr *where = (Elf_Addr *)(relocbase + rela->r_offset);
     50 	Elf_Addr addr, addend = rela->r_addend;
     51 	int error;
     52 
     53 	if (!isrela) {
     54 		printf("Elf_Rel not supported");
     55 		return -1;
     56 	}
     57 	const Elf_Sym *sym = kobj_symbol(ko, symidx);
     58 
     59 	if (!local && ELF_ST_BIND(sym->st_info) == STB_LOCAL) {
     60 		return 0;
     61 	}
     62 
     63 	if (rtype != R_VAX_PC32 && rtype != R_VAX_32) {
     64 		printf("Bad relocation %d", rtype);
     65 		return -1;
     66 	}
     67 
     68 	if ((error = kobj_sym_lookup(ko, symidx, &addr)))
     69 		return -1;
     70 	addr += addend;
     71 	if (rtype == R_VAX_PC32)
     72 		addr -= (Elf_Addr)where + 4;
     73 
     74 	*where = addr;
     75 	return 0;
     76 }
     77 
     78 int
     79 kobj_machdep(kobj_t ko, void *base, size_t size, bool load)
     80 {
     81 	return 0;
     82 }
     83