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| author | Max Filippov <jcmvbkbc@gmail.com> | 2013-07-03 16:23:28 (GMT) |
|---|---|---|
| committer | Chris Zankel <chris@zankel.net> | 2013-09-06 16:47:41 (GMT) |
| commit | 99d5040ebc3cccc90dfe031f615ac3fbc79905b6 (patch) | |
| tree | 04d720df138145f5cb4efd4cf4358c88d44b19d3 /arch/xtensa/kernel/align.S | |
| parent | 16c5becf39a2d174f08b46504f522c2fa50ef462 (diff) | |
| download | linux-99d5040ebc3cccc90dfe031f615ac3fbc79905b6.tar.xz | |
xtensa: keep a3 and excsave1 on entry to exception handlers
Based on the SMP patch by Joe Taylor and subsequent fixes.
Preserve exception table pointer (normally stored in excsave1 SR) as it
cannot be easily restored in SMP environment.
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Chris Zankel <chris@zankel.net>
Diffstat (limited to 'arch/xtensa/kernel/align.S')
| -rw-r--r-- | arch/xtensa/kernel/align.S | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/arch/xtensa/kernel/align.S b/arch/xtensa/kernel/align.S index aa2e87b..d4cef60 100644 --- a/arch/xtensa/kernel/align.S +++ b/arch/xtensa/kernel/align.S @@ -146,9 +146,9 @@ * a0: trashed, original value saved on stack (PT_AREG0) * a1: a1 * a2: new stack pointer, original in DEPC - * a3: dispatch table + * a3: a3 * depc: a2, original value saved on stack (PT_DEPC) - * excsave_1: a3 + * excsave_1: dispatch table * * PT_DEPC >= VALID_DOUBLE_EXCEPTION_ADDRESS: double exception, DEPC * < VALID_DOUBLE_EXCEPTION_ADDRESS: regular exception @@ -171,7 +171,6 @@ ENTRY(fast_unaligned) s32i a8, a2, PT_AREG8 rsr a0, depc - xsr a3, excsave1 s32i a0, a2, PT_AREG2 s32i a3, a2, PT_AREG3 |