Added main stack munging

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@1356 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 18 insertions, 3 deletions

diff --git a/firmware/crt0.S b/firmware/crt0.S
index 39344b297a..fe1fad8cac 100644
--- a/firmware/crt0.S
+++ b/firmware/crt0.S
@@ -99,6 +99,17 @@ start_l:
         bt      start_l
         nop
 
+        /* Munge the main thread stack */
+        mov.l   stack_k,r2
+        mov.l   deadbeef_k,r0
+        mov.l   stackbegin_k,r1
+munge_loop:
+        mov.l   r0,@r1
+        add     #4,r1
+        cmp/ge  r1,r2
+        bt      munge_loop
+        nop
+        
         ! call the mainline     
         mov.l   main_k,r0
         jsr     @r0
@@ -108,7 +119,11 @@ start_l:
 
         .align 2
 stack_k:
-        .long   _stack  
+        .long   _stackend       
+stackbegin_k:
+        .long   _stackbegin
+deadbeef_k:
+        .long   0xdeadbeef
 edata_k:
         .long   _edata
 end_k:
@@ -123,6 +138,6 @@ orig_vbr_k:
         .section .resetvectors
 vectors:
         .long start
-        .long _stack
+        .long _stackend
         .long start
-        .long _stack
+        .long _stackend