MBTumbl: Fork microblaze libgcc into tumbl

[fpga/lx-cpu1/gcc-tumbl.git] / libgcc / config / mbtumbl / stack_overflow_exit.S

diff --git a/libgcc/config/mbtumbl/stack_overflow_exit.S b/libgcc/config/mbtumbl/stack_overflow_exit.S
new file mode 100644 (file)
index 0000000..98182a2
--- /dev/null
+++ b/libgcc/config/mbtumbl/stack_overflow_exit.S
@@ -0,0 +1,61 @@
+###################################-*-asm*- 
+# 
+#    Copyright 2009, 2011 Free Software Foundation, Inc.
+# 
+#
+#  Contributed by Michael Eager <eager@eagercon.com>.
+#
+#  This file is free software; you can redistribute it and/or modify it
+#  under the terms of the GNU General Public License as published by the
+#  Free Software Foundation; either version 3, or (at your option) any
+#  later version.
+#
+#  GCC is distributed in the hope that it will be useful, but WITHOUT
+#  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+#  or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
+#  License for more details.
+#
+#  Under Section 7 of GPL version 3, you are granted additional
+#  permissions described in the GCC Runtime Library Exception, version
+#  3.1, as published by the Free Software Foundation.
+#
+#  You should have received a copy of the GNU General Public License and
+#  a copy of the GCC Runtime Library Exception along with this program;
+#  see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+#  <http://www.gnu.org/licenses/>.  
+# 
+#  stack_overflow_exit.S
+# 
+#  Checks for stack overflows and sets the global variable 
+#  stack_overflow_error with the value of current stack pointer
+#
+#  This routine exits from the program
+# 
+#######################################
+
+       .globl  _stack_overflow_error
+       .data
+       .align  2
+       .type   _stack_overflow_error,@object
+       .size   _stack_overflow_error,4
+_stack_overflow_error:
+       .data32 0
+
+       .text 
+       .globl  _stack_overflow_exit    
+       .ent    _stack_overflow_exit
+       .type   _stack_overflow_exit,@function
+
+_stack_overflow_exit:
+#ifdef __PIC__
+       mfs     r20,rpc
+       addik   r20,r20,_GLOBAL_OFFSET_TABLE_+8
+       swi     r1,r20,_stack_overflow_error@GOTOFF
+       bri     exit@PLT
+#else
+       swi     r1,r0,_stack_overflow_error
+       bri     exit
+#endif
+
+       .end    _stack_overflow_exit
+       .size   _stack_overflow_exit,. - _stack_overflow_exit