[RFC] Add L1 symbol section supporting in kallsyms.c

[Luke Yang]

Hi all,

  We are maintaining linux kernel for the ADI Blackfin CPU which has
L1 text and data rams. To make use of the L1 memory we add a new text
section call text_l1.  So kallsyms.c need to be modified to search the
new section and generate the right Sysmap.map.

 Currently we add the section support directly.  Or do it in a more
common way for future extending? Any comments? Thanks!


Index: git/linux-2.6/scripts/kallsyms.c
===================================================================
--- git.orig/linux-2.6/scripts/kallsyms.c
+++ git/linux-2.6/scripts/kallsyms.c
@@ -12,6 +12,8 @@
 * (25/Aug/2004) Paulo Marques <pmarques@xxxxxxxxxxxx>
 *      Changed the compression method from stem compression to "table lookup"
 *      compression
+ * (10/Jul/2006) Robin Getz <rgetz@xxxxxxxxxxxxxxxxxxxx>
+ *      Add _stext_l1, _etext_l1 for the L1 memory section in Blackfin.
 *
 *      Table compression uses all the unused char codes on the symbols and
 *  maps these to the most used substrings (tokens). For instance, it might
@@ -44,6 +46,7 @@ struct sym_entry {
static struct sym_entry *table;
static unsigned int table_size, table_cnt;
static unsigned long long _stext, _etext, _sinittext, _einittext,
_sextratext, _eextratext;
+static unsigned long long _stext_l1, _etext_l1;
static int all_symbols = 0;
static char symbol_prefix_char = '\0';

@@ -103,6 +106,10 @@ static int read_symbol(FILE *in, struct
               _sextratext = s->addr;
       else if (strcmp(sym, "_eextratext") == 0)
               _eextratext = 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 (toupper(stype) == 'A')
       {
               /* Keep these useful absolute symbols */
@@ -166,7 +173,8 @@ static int symbol_valid(struct sym_entry
       if (!all_symbols) {
               if ((s->addr < _stext || s->addr > _etext)
                   && (s->addr < _sinittext || s->addr > _einittext)
-                   && (s->addr < _sextratext || s->addr > _eextratext))
+                   && (s->addr < _sextratext || s->addr > _eextratext)
+                   && (s->addr < _stext_l1 || s->addr > _etext_l1))
                       return 0;
               /* Corner case.  Discard any symbols with the same value as
                * _etext _einittext or _eextratext; they can move between pass

--
Best regards,
Luke Yang
luke.adi@xxxxxxxxx
-
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