AcoSail/kernel_optimize_test
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[XTENSA] Remove unused code

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We will never (need to) support signal handling coming from a
double exception. There are too many things that could go wrong
and delivering signals is not the fastest method for IPC, anyway.

Signed-off-by: Chris Zankel <chris@zankel.net>
This commit is contained in:
Chris Zankel 2008-02-12 13:10:40 -08:00
parent 3b4a49e21b
commit 03dfa442e5
1 changed files with 0 additions and 22 deletions
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22
arch/xtensa/kernel/entry.S
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@ -28,7 +28,6 @@
/* Unimplemented features. */
#undef SIGNAL_HANDLING_IN_DOUBLE_EXCEPTION
#undef KERNEL_STACK_OVERFLOW_CHECK
#undef PREEMPTIBLE_KERNEL
#undef ALLOCA_EXCEPTION_IN_IRAM
@ -431,11 +430,8 @@ common_exception_return:
_bbsi.l a4, TIF_NEED_RESCHED, 3f
_bbci.l a4, TIF_SIGPENDING, 4f
#ifndef SIGNAL_HANDLING_IN_DOUBLE_EXCEPTION
l32i a4, a1, PT_DEPC
bgeui a4, VALID_DOUBLE_EXCEPTION_ADDRESS, 4f
#endif
/* Reenable interrupts and call do_signal() */
wsr a3, PS
@ -1247,16 +1243,6 @@ fast_syscall_spill_registers_fixup:
* Note: This frame might be the same as above.
*/
#ifdef SIGNAL_HANDLING_IN_DOUBLE_EXCEPTION
/* Restore registers we precautiously saved.
* We have the value of the 'right' a3
*/
l32i a7, a2, PT_AREG5
l32i a11, a2, PT_AREG6
l32i a15, a2, PT_AREG7
#endif
/* Setup stack pointer. */
addi a2, a2, -PT_USER_SIZE
@ -1290,14 +1276,6 @@ fast_syscall_spill_registers_fixup_return:
s32i a2, a3, EXC_TABLE_PARAM
l32i a2, a3, EXC_TABLE_KSTK
#ifdef SIGNAL_HANDLING_IN_DOUBLE_EXCEPTION
/* Save registers again that might be clobbered. */
s32i a7, a2, PT_AREG5
s32i a11, a2, PT_AREG6
s32i a15, a2, PT_AREG7
#endif
/* Load WB at the time the exception occurred. */
rsr a3, SAR # WB is still in SAR