root/arch/alpha/lib/dbg_stackcheck.S

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   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * arch/alpha/lib/dbg_stackcheck.S
   4  * Contributed by Richard Henderson (rth@tamu.edu)
   5  *
   6  * Verify that we have not overflowed the stack.  Oops if we have.
   7  */
   8 
   9 #include <asm/asm-offsets.h>
  10 
  11         .text
  12         .set noat
  13 
  14         .align 3
  15         .globl _mcount
  16         .ent _mcount
  17 _mcount:
  18         .frame $30, 0, $28, 0
  19         .prologue 0
  20 
  21         lda     $0, TASK_SIZE($8)
  22         cmpult  $30, $0, $0
  23         bne     $0, 1f
  24         ret     ($28)
  25 1:      stq     $31, -8($31)    # oops me, damn it.
  26         br      1b
  27 
  28         .end _mcount
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