kallsyms: support kernel symbols in Blackfin on-chip memory

The Blackfin arch has a discontiguous .text layout due to having on-chip
instruction memory and no virtual memory support.  As such, we need to
add explicit checks for these additional .text regions.

Signed-off-by: Robin Getz <robin.getz@analog.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>

scripts/kallsyms.c

@@ -35,6 +35,7 @@ struct sym_entry {
 static struct sym_entry *table;
 static unsigned int table_size, table_cnt;
 static unsigned long long _text, _stext, _etext, _sinittext, _einittext;
+static unsigned long long _stext_l1, _etext_l1, _stext_l2, _etext_l2;
 static int all_symbols = 0;
 static char symbol_prefix_char = '\0';
 
@@ -92,6 +93,14 @@ 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, "_stext_l1") == 0)
+		_stext_l1 = s->addr;
+	else if (strcmp(sym, "_etext_l1") == 0)
+		_etext_l1 = s->addr;
+	else if (strcmp(sym, "_stext_l2") == 0)
+		_stext_l2 = s->addr;
+	else if (strcmp(sym, "_etext_l2") == 0)
+		_etext_l2 = s->addr;
 	else if (toupper(stype) == 'A')
 	{
 		/* Keep these useful absolute symbols */
@@ -157,7 +166,9 @@ 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 < _sinittext || s->addr > _einittext)
+		    && (s->addr < _stext_l1 || s->addr > _etext_l1)
+		    && (s->addr < _stext_l2 || s->addr > _etext_l2))
 			return 0;
 		/* Corner case.  Discard any symbols with the same value as
 		 * _etext _einittext; they can move between pass 1 and 2 when