1*4882a593Smuzhiyun/* SPDX-License-Identifier: GPL-2.0 */ 2*4882a593Smuzhiyun/* 3*4882a593Smuzhiyun * arch/alpha/lib/dbg_stackcheck.S 4*4882a593Smuzhiyun * Contributed by Richard Henderson (rth@tamu.edu) 5*4882a593Smuzhiyun * 6*4882a593Smuzhiyun * Verify that we have not overflowed the stack. Oops if we have. 7*4882a593Smuzhiyun */ 8*4882a593Smuzhiyun 9*4882a593Smuzhiyun#include <asm/asm-offsets.h> 10*4882a593Smuzhiyun 11*4882a593Smuzhiyun .text 12*4882a593Smuzhiyun .set noat 13*4882a593Smuzhiyun 14*4882a593Smuzhiyun .align 3 15*4882a593Smuzhiyun .globl _mcount 16*4882a593Smuzhiyun .ent _mcount 17*4882a593Smuzhiyun_mcount: 18*4882a593Smuzhiyun .frame $30, 0, $28, 0 19*4882a593Smuzhiyun .prologue 0 20*4882a593Smuzhiyun 21*4882a593Smuzhiyun lda $0, TASK_SIZE($8) 22*4882a593Smuzhiyun cmpult $30, $0, $0 23*4882a593Smuzhiyun bne $0, 1f 24*4882a593Smuzhiyun ret ($28) 25*4882a593Smuzhiyun1: stq $31, -8($31) # oops me, damn it. 26*4882a593Smuzhiyun br 1b 27*4882a593Smuzhiyun 28*4882a593Smuzhiyun .end _mcount 29