X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;f=scripts%2Fkallsyms.c;h=ad2434b26970c17b4b72efb82761afd0ac04042d;hb=2e2e8d53c3f34684af7a7475098b7524a6b854c2;hp=1f11d848532a0474b342ca462a905af4f044b2f6;hpb=efffbeee5bc4168059683714b300d307f5193d69;p=safe%2Fjmp%2Flinux-2.6

diff --git a/scripts/kallsyms.c b/scripts/kallsyms.c
index 1f11d84..ad2434b 100644
--- a/scripts/kallsyms.c
+++ b/scripts/kallsyms.c
@@ -7,12 +7,6 @@
  *
  * Usage: nm -n vmlinux | scripts/kallsyms [--all-symbols] > symbols.S
  *
- * ChangeLog:
- *
- * (25/Aug/2004) Paulo Marques <pmarques@grupopie.com>
- *      Changed the compression method from stem compression to "table lookup"
- *      compression
- *
  *      Table compression uses all the unused char codes on the symbols and
  *  maps these to the most used substrings (tokens). For instance, it might
  *  map char code 0xF7 to represent "write_" and then in every symbol where
@@ -31,17 +25,16 @@
 
 #define KSYM_NAME_LEN		128
 
-
 struct sym_entry {
 	unsigned long long addr;
 	unsigned int len;
+	unsigned int start_pos;
 	unsigned char *sym;
 };
 
-
 static struct sym_entry *table;
 static unsigned int table_size, table_cnt;
-static unsigned long long _text, _stext, _etext, _sinittext, _einittext, _sextratext, _eextratext;
+static unsigned long long _text, _stext, _etext, _sinittext, _einittext;
 static int all_symbols = 0;
 static char symbol_prefix_char = '\0';
 
@@ -99,10 +92,6 @@ static int read_symbol(FILE *in, struct sym_entry *s)
 		_sinittext = s->addr;
 	else if (strcmp(sym, "_einittext") == 0)
 		_einittext = s->addr;
-	else if (strcmp(sym, "_sextratext") == 0)
-		_sextratext = s->addr;
-	else if (strcmp(sym, "_eextratext") == 0)
-		_eextratext = s->addr;
 	else if (toupper(stype) == 'A')
 	{
 		/* Keep these useful absolute symbols */
@@ -119,6 +108,9 @@ static int read_symbol(FILE *in, struct sym_entry *s)
 	/* exclude also MIPS ELF local symbols ($L123 instead of .L123) */
 	else if (str[0] == '$')
 		return -1;
+	/* exclude debugging symbols */
+	else if (stype == 'N')
+		return -1;
 
 	/* include the type field in the symbol name, so that it gets
 	 * compressed together */
@@ -165,18 +157,18 @@ static int symbol_valid(struct sym_entry *s)
 	 * and inittext sections are discarded */
 	if (!all_symbols) {
 		if ((s->addr < _stext || s->addr > _etext)
-		    && (s->addr < _sinittext || s->addr > _einittext)
-		    && (s->addr < _sextratext || s->addr > _eextratext))
+		    && (s->addr < _sinittext || s->addr > _einittext))
 			return 0;
 		/* Corner case.  Discard any symbols with the same value as
-		 * _etext _einittext or _eextratext; they can move between pass
-		 * 1 and 2 when the kallsyms data are added.  If these symbols
-		 * move then they may get dropped in pass 2, which breaks the
-		 * kallsyms rules.
+		 * _etext _einittext; they can move between pass 1 and 2 when
+		 * the kallsyms data are added.  If these symbols move then
+		 * they may get dropped in pass 2, which breaks the kallsyms
+		 * rules.
 		 */
-		if ((s->addr == _etext && strcmp((char*)s->sym + offset, "_etext")) ||
-		    (s->addr == _einittext && strcmp((char*)s->sym + offset, "_einittext")) ||
-		    (s->addr == _eextratext && strcmp((char*)s->sym + offset, "_eextratext")))
+		if ((s->addr == _etext &&
+				strcmp((char *)s->sym + offset, "_etext")) ||
+		    (s->addr == _einittext &&
+				strcmp((char *)s->sym + offset, "_einittext")))
 			return 0;
 	}
 
@@ -202,8 +194,10 @@ static void read_map(FILE *in)
 				exit (1);
 			}
 		}
-		if (read_symbol(in, &table[table_cnt]) == 0)
+		if (read_symbol(in, &table[table_cnt]) == 0) {
+			table[table_cnt].start_pos = table_cnt;
 			table_cnt++;
+		}
 	}
 }
 
@@ -506,6 +500,35 @@ static void optimize_token_table(void)
 	optimize_result();
 }
 
+static int compare_symbols(const void *a, const void *b)
+{
+	const struct sym_entry *sa;
+	const struct sym_entry *sb;
+	int wa, wb;
+
+	sa = a;
+	sb = b;
+
+	/* sort by address first */
+	if (sa->addr > sb->addr)
+		return 1;
+	if (sa->addr < sb->addr)
+		return -1;
+
+	/* sort by "weakness" type */
+	wa = (sa->sym[0] == 'w') || (sa->sym[0] == 'W');
+	wb = (sb->sym[0] == 'w') || (sb->sym[0] == 'W');
+	if (wa != wb)
+		return wa - wb;
+
+	/* sort by initial order, so that other symbols are left undisturbed */
+	return sa->start_pos - sb->start_pos;
+}
+
+static void sort_symbols(void)
+{
+	qsort(table, table_cnt, sizeof(struct sym_entry), compare_symbols);
+}
 
 int main(int argc, char **argv)
 {
@@ -527,6 +550,7 @@ int main(int argc, char **argv)
 		usage();
 
 	read_map(stdin);
+	sort_symbols();
 	optimize_token_table();
 	write_src();