Verify stack more accurately in sparc64 stack overflow

debugger by taking the FPU save area depth into consideration.

Verify stack more accurately in sparc64 stack overflow
debugger by taking the FPU save area depth into consideration.
267bdcc1 · David S. Miller · b0cb83ba · 267bdcc1
Commit 267bdcc1 authored Mar 13, 2002 by David S. Miller
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arch/sparc64/lib/mcount.S arch/sparc64/lib/mcount.S +6 -1

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--- a/arch/sparc64/lib/mcount.S
+++ b/arch/sparc64/lib/mcount.S
@@ -36,7 +36,12 @@ mcount:
 	/*
 	 * Check whether %sp is dangerously low.
 	 */
-	add		%g6, (TI_FPREGS + 256 + 192), %g5! where does task_struct+frame end?
+	ldub		[%g6 + TI_FPDEPTH], %g1
+	srl		%g1, 1, %g5
+	add		%g5, 1, %g5
+	sllx		%g5, 8, %g5			! each fpregs frame is 256b
+	add		%g5, 192, %g5
+	add		%g6, %g5, %g5			! where does task_struct+frame end?
 	sub		%g5, STACK_BIAS, %g5
 	cmp		%sp, %g5
 	bg,pt		%xcc, 1f