Get rid of GNU libelf and its autoconf nastiness and replace

it with FreeBSD's implementation

--HG--
extra : convert_revision : ef9c4551b9a6b54b76a89f286ff9804c55790621

1 files changed, 52 insertions, 0 deletions

diff --git a/ext/libelf/elf_hash.c b/ext/libelf/elf_hash.c
new file mode 100644
index 000000000..b2e4a0ac0
--- /dev/null
+++ b/ext/libelf/elf_hash.c
@@ -0,0 +1,52 @@
+/*-
+ * Copyright (c) 2006 Joseph Koshy
+ * 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.
+ */
+
+
+#include "libelf.h"
+
+/*
+ * This elf_hash function is defined by the System V ABI.  It must be
+ * kept compatible with "src/libexec/rtld-elf/rtld.c".
+ */
+
+unsigned long
+elf_hash(const char *name)
+{
+        unsigned long h, t;
+        const unsigned char *s;
+
+        s = (const unsigned char *) name;
+        h = t = 0;
+
+        for (; *s != '\0'; h = h & ~t) {
+                h = (h << 4) + *s++;
+                t = h & 0xF0000000UL;
+                if (t)
+                        h ^= t >> 24;
+        }
+
+        return (h);
+}