From 66fdbc00cfad3be604d07da78b916f4c04f96dbc Mon Sep 17 00:00:00 2001
From: paul <paul@FreeBSD.org>
Date: Wed, 3 Nov 1993 23:41:59 +0000
Subject: Imported NetBSD's ld for shared libs.

---
 gnu/usr.bin/ld/symbol.c | 148 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 148 insertions(+)
 create mode 100644 gnu/usr.bin/ld/symbol.c

(limited to 'gnu/usr.bin/ld/symbol.c')

diff --git a/gnu/usr.bin/ld/symbol.c b/gnu/usr.bin/ld/symbol.c
new file mode 100644
index 0000000..899786c
--- /dev/null
+++ b/gnu/usr.bin/ld/symbol.c
@@ -0,0 +1,148 @@
+/*
+ * $Id: symbol.c,v 1.3 1993/11/01 16:26:19 pk Exp $		- symbol table routines
+ */
+
+/* Create the symbol table entries for `etext', `edata' and `end'.  */
+
+#include <sys/param.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <fcntl.h>
+#include <a.out.h>
+#include <stab.h>
+#include <string.h>
+
+#include "ld.h"
+
+void
+symtab_init (relocatable_output)
+int	relocatable_output;
+{
+	/*
+	 * Put linker reserved symbols into symbol table.
+	 */
+
+	dynamic_symbol = getsym ("__DYNAMIC");
+	dynamic_symbol->defined = relocatable_output?N_UNDF:(N_DATA | N_EXT);
+	dynamic_symbol->referenced = 0;
+	dynamic_symbol->value = 0;
+
+	got_symbol = getsym ("__GLOBAL_OFFSET_TABLE_");
+	got_symbol->defined = N_DATA | N_EXT;
+	got_symbol->referenced = 0;
+	got_symbol->value = 0;
+
+	if (relocatable_output)
+		return;
+
+#ifndef nounderscore
+	edata_symbol = getsym ("_edata");
+	etext_symbol = getsym ("_etext");
+	end_symbol = getsym ("_end");
+#else
+	edata_symbol = getsym ("edata");
+	etext_symbol = getsym ("etext");
+	end_symbol = getsym ("end");
+#endif
+	edata_symbol->defined = N_DATA | N_EXT;
+	etext_symbol->defined = N_TEXT | N_EXT;
+	end_symbol->defined = N_BSS | N_EXT;
+
+	edata_symbol->referenced = 1;
+	etext_symbol->referenced = 1;
+	end_symbol->referenced = 1;
+}
+
+/* Compute the hash code for symbol name KEY.  */
+
+int
+hash_string (key)
+     char *key;
+{
+	register char *cp;
+	register int k;
+
+	cp = key;
+	k = 0;
+	while (*cp)
+		k = (((k << 1) + (k >> 14)) ^ (*cp++)) & 0x3fff;
+
+	return k;
+}
+
+/* Get the symbol table entry for the global symbol named KEY.
+   Create one if there is none.  */
+
+symbol *
+getsym(key)
+	char *key;
+{
+	register int hashval;
+	register symbol *bp;
+
+	/* Determine the proper bucket.  */
+	hashval = hash_string (key) % TABSIZE;
+
+	/* Search the bucket.  */
+	for (bp = symtab[hashval]; bp; bp = bp->link)
+		if (! strcmp (key, bp->name))
+			return bp;
+
+	/* Nothing was found; create a new symbol table entry.  */
+	bp = (symbol *) xmalloc (sizeof (symbol));
+	bp->refs = 0;
+	bp->name = (char *) xmalloc (strlen (key) + 1);
+	strcpy (bp->name, key);
+	bp->defined = 0;
+	bp->referenced = 0;
+	bp->trace = 0;
+	bp->value = 0;
+	bp->max_common_size = 0;
+	bp->warning = 0;
+	bp->undef_refs = 0;
+	bp->multiply_defined = 0;
+	bp->alias = 0;
+	bp->setv_count = 0;
+
+	bp->size = 0;
+	bp->sorefs = 0;
+	bp->so_defined = 0;
+	bp->def_nlist = 0;
+	bp->jmpslot_offset = -1;
+	bp->gotslot_offset = -1;
+	bp->jmpslot_claimed = 0;
+	bp->gotslot_claimed = 0;
+	bp->cpyreloc_reserved = 0;
+	bp->cpyreloc_claimed = 0;
+
+	/* Add the entry to the bucket.  */
+	bp->link = symtab[hashval];
+	symtab[hashval] = bp;
+
+	++num_hash_tab_syms;
+
+	return bp;
+}
+
+/* Like `getsym' but return 0 if the symbol is not already known.  */
+
+symbol *
+getsym_soft (key)
+     char *key;
+{
+	register int hashval;
+	register symbol *bp;
+
+	/* Determine which bucket.  */
+
+	hashval = hash_string (key) % TABSIZE;
+
+	/* Search the bucket.  */
+
+	for (bp = symtab[hashval]; bp; bp = bp->link)
+		if (! strcmp (key, bp->name))
+			return bp;
+
+	return 0;
+}
-- 
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