From 9cbbd424d80823679983cc2c5ab5fa716281d16c Mon Sep 17 00:00:00 2001
From: grehan <grehan@FreeBSD.org>
Date: Wed, 2 Mar 2005 12:27:42 +0000
Subject: PowerPC support for kldxref by handling the PPC-specific relocations.

---
 usr.sbin/kldxref/ef_powerpc.c | 74 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 74 insertions(+)
 create mode 100644 usr.sbin/kldxref/ef_powerpc.c

(limited to 'usr.sbin/kldxref')

diff --git a/usr.sbin/kldxref/ef_powerpc.c b/usr.sbin/kldxref/ef_powerpc.c
new file mode 100644
index 0000000..5b9f91c
--- /dev/null
+++ b/usr.sbin/kldxref/ef_powerpc.c
@@ -0,0 +1,74 @@
+/*-
+ * Copyright (c) 2005 Peter Grehan.
+ * Copyright 1996-1998 John D. Polstra.
+ * All rights reserved.
+ *
+ * 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 AUTHOR 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 AUTHOR 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.
+ *
+ * $FreeBSD$
+ */
+
+#include <sys/types.h>
+#include <machine/elf.h>
+
+#include <err.h>
+#include <errno.h>
+#include <string.h>
+
+#include "ef.h"
+
+#include <stdio.h>
+
+/*
+ * Apply relocations to the values obtained from the file. `relbase' is the
+ * target relocation address of the section, and `dataoff/len' is the region
+ * that is to be relocated, and has been copied to *dest
+ */
+int
+ef_reloc(struct elf_file *ef, const void *reldata, int reltype, Elf_Off relbase,
+    Elf_Off dataoff, size_t len, void *dest)
+{
+        Elf_Addr *where, addr, addend;
+        Elf_Word rtype, symidx;
+        const Elf_Rela *rela;
+
+	if (reltype != EF_RELOC_RELA)
+		return (EINVAL);
+
+	rela = (const Elf_Rela *)reldata;
+	where = (Elf_Addr *) ((Elf_Off)dest - dataoff + rela->r_offset);
+	addend = rela->r_addend;
+	rtype = ELF_R_TYPE(rela->r_info);
+	symidx = ELF_R_SYM(rela->r_info);
+
+	 if ((char *)where < (char *)dest || (char *)where >= (char *)dest + len)
+                return (0);
+
+	switch(rtype) {
+	case R_PPC_RELATIVE: /* word32 B + A */
+		*where = relbase + addend;
+		break;
+	default:
+		warnx("unhandled relocation type %d", rtype);
+	}
+	return (0);
+}
-- 
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