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      1 ###################################-*-asm*-
      2 #
      3 #    Copyright (C) 2009-2024 Free Software Foundation, Inc.
      4 #
      5 #
      6 #  Contributed by Michael Eager <eager@eagercon.com>.
      7 #
      8 #  This file is free software; you can redistribute it and/or modify it
      9 #  under the terms of the GNU General Public License as published by the
     10 #  Free Software Foundation; either version 3, or (at your option) any
     11 #  later version.
     12 #
     13 #  GCC is distributed in the hope that it will be useful, but WITHOUT
     14 #  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
     15 #  or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
     16 #  License for more details.
     17 #
     18 #  Under Section 7 of GPL version 3, you are granted additional
     19 #  permissions described in the GCC Runtime Library Exception, version
     20 #  3.1, as published by the Free Software Foundation.
     21 #
     22 #  You should have received a copy of the GNU General Public License and
     23 #  a copy of the GCC Runtime Library Exception along with this program;
     24 #  see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
     25 #  <http://www.gnu.org/licenses/>.
     26 #
     27 #  stack_overflow_exit.S
     28 #
     29 #  Checks for stack overflows and sets the global variable
     30 #  stack_overflow_error with the value of current stack pointer
     31 #
     32 #  This routine exits from the program
     33 #
     34 #######################################
     35 
     36 /* An executable stack is *not* required for these functions.  */
     37 #ifdef __linux__
     38 .section .note.GNU-stack,"",%progbits
     39 .previous
     40 #endif
     41 
     42 	.globl	_stack_overflow_error
     43 	.data
     44 	.align	2
     45 	.type	_stack_overflow_error,@object
     46 	.size	_stack_overflow_error,4
     47 _stack_overflow_error:
     48 	.data32	0
     49 
     50 	.text
     51 	.globl	_stack_overflow_exit
     52 	.ent	_stack_overflow_exit
     53 	.type	_stack_overflow_exit,@function
     54 
     55 _stack_overflow_exit:
     56 #ifdef __PIC__
     57 	mfs	r20,rpc
     58 	addik	r20,r20,_GLOBAL_OFFSET_TABLE_+8
     59 	swi	r1,r20,_stack_overflow_error@GOTOFF
     60 	bri	exit@PLT
     61 #else
     62 	swi	r1,r0,_stack_overflow_error
     63 	bri	exit
     64 #endif
     65 
     66 	.end 	_stack_overflow_exit
     67 	.size	_stack_overflow_exit,. - _stack_overflow_exit
     68