CVS: gcc/gcc-3.3/gcc/config/msp430 libgcc.S, 1.14, 1.15

Update of /cvsroot/mspgcc/gcc/gcc-3.3/gcc/config/msp430
In directory 23jxhf1.ch3.sourceforge.com:/tmp/cvs-serv19277

Modified Files:
	libgcc.S 
Log Message:
Initializing stack pointer befote C++ constructors fixed.


Index: libgcc.S
===================================================================
RCS file: /cvsroot/mspgcc/gcc/gcc-3.3/gcc/config/msp430/libgcc.S,v
retrieving revision 1.14
retrieving revision 1.15
diff -u -w -d -r1.14 -r1.15
--- libgcc.S	30 May 2008 23:01:32 -0000	1.14
+++ libgcc.S	11 Dec 2008 19:52:29 -0000	1.15
@@ -564,8 +564,26 @@
 
     /* link following functions if library _reset_vector__ used */
 
-;    actualy stack initialized in main() prologue, so don't link __init_stack
-;	.global	__init_stack
+;    stack can be initialized in main() prologue,
+;    but setting stack pointer here allows to call subroutines 
+;    from startup code and call constructors of statically allocated C++ objects.
+;    Stack pointer will have the same value entering main() as here,
+;    so -mno-stack-init can be used to reduce code size.
+;    initial stack value can be set in ld script as __stack symbol 
+;    (end of RAM by default), or via -defsym __stack=<address> ld option
+;    or via -Wl,defsym,__stack=<address> gcc option, or by redefining
+;    __init_stack function as fololws:
+;
+;#if defined (__cplusplus)
+;extern "C" 
+;#endif
+;__attribute__((__naked__)) __attribute__((section(".init2"))) void __init_stack()
+;{
+;    asm volatile("\tmov\t#stack_addr, r1\n");
+;}
+;
+
+	.global	__init_stack
 
 	.global	__low_level_init
 	.global	__do_copy_data
@@ -587,7 +605,7 @@
 
 	.func   __init_stack
 
-set_stack_pointer:
+__init_stack:
 	mov     #__stack, r1
 
 	.endfunc
@@ -672,8 +690,6 @@
 	.weak   __do_global_ctors
     
 	.func   __do_global_ctors
-	.global	__init_stack    ; stack has to be set before constructors calling
-
 
 __do_global_ctors:
 	mov     #__ctors_start, r11


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