Commit ea438d0a authored by Daniel Leung's avatar Daniel Leung Committed by Anas Nashif
Browse files

xtensa: asm2: add code for double exception vector 



This adds a simple infinite loop when double exception is raised.
Without this, if double exception occurs, it would execute
arbitrary code.

Signed-off-by: default avatarDaniel Leung <daniel.leung@intel.com>
parent 04ae3808

arch/xtensa/core/xtensa-asm2-util.S

+14 −0
Original line number Diff line number Diff line
@@ -307,4 +307,18 @@ _KernelExceptionVector: 
	j _Level1Vector

.popsection



#ifdef XCHAL_DOUBLEEXC_VECTOR_VADDR

.pushsection .DoubleExceptionVector.text, "ax"

.global _DoubleExceptionVector

_DoubleExceptionVector:

#if XCHAL_HAVE_DEBUG

/* Signals an unhandled double exception */

1:	break	1, 4

#else

1:

#endif

	j	1b

.popsection

#endif



#endif /* CONFIG_XTENSA_ASM2 */

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