[src/trunk]: src/sys/arch/vax/vax Kernel linker support for vax....

[ragge <ragge%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/995c161e9f2a
branches:  trunk
changeset: 318585:995c161e9f2a
user:      ragge <ragge%NetBSD.org@localhost>
date:      Mon Apr 30 06:46:12 2018 +0000
description:
Kernel linker support for vax.  Now modules can be loaded again.
XXX - should keep modules on physical segment instead of in KVM.

diffstat:

 sys/arch/vax/vax/kobj_machdep.c |  76 +++++++++++++++++++++++++++++++++++++++++
 1 files changed, 76 insertions(+), 0 deletions(-)

diffs (80 lines):

diff -r 9a87f431732f -r 995c161e9f2a sys/arch/vax/vax/kobj_machdep.c
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/sys/arch/vax/vax/kobj_machdep.c   Mon Apr 30 06:46:12 2018 +0000
@@ -0,0 +1,76 @@
+/*      $NetBSD: kobj_machdep.c,v 1.1 2018/04/30 06:46:12 ragge Exp $   */
+
+/*-
+ * Copyright (c) 2018 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Anders Magnusson.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <sys/param.h>
+#include <sys/kobj.h>
+#include <sys/exec.h>
+#include <sys/exec_elf.h>
+
+/*
+ * VAX kernel uses two relocations;
+ *     - R_VAX_PC32 which is PC relative offset
+ *     - R_VAX_32 which is an absolute symbol offset
+ */
+int
+kobj_reloc(kobj_t ko, uintptr_t relocbase, const void *data,
+       bool isrela, bool local)
+{
+       const Elf_Rela *rela = (const Elf_Rela *)data;
+       Elf_Word rtype = ELF_R_TYPE(rela->r_info);
+       Elf_Word symidx = ELF_R_SYM(rela->r_info);
+       Elf_Addr *where = (Elf_Addr *)(relocbase + rela->r_offset);
+       Elf_Addr addr, addend = rela->r_addend;
+       int error;
+
+       if (!isrela) {
+               printf("Elf_Rel not supported");
+               return -1;
+       }
+       if (rtype != R_VAX_PC32 && rtype != R_VAX_32) {
+               printf("Bad relocation %d", rtype);
+               return -1;
+       }
+
+       if ((error = kobj_sym_lookup(ko, symidx, &addr)))
+               return -1;
+       addr += addend;
+       if (rtype == R_VAX_PC32)
+               addr -= (Elf_Addr)where + 4;
+
+       *where = addr;
+       return 0;
+}
+
+int
+kobj_machdep(kobj_t ko, void *base, size_t size, bool load)
+{
+       return 0;
+}