]> git.baikalelectronics.ru Git - kernel.git/commit
MIPS: Send SIGILL for R6 branches in `__compute_return_epc_for_insn'
authorMaciej W. Rozycki <macro@imgtec.com>
Thu, 15 Jun 2017 23:14:12 +0000 (00:14 +0100)
committerRalf Baechle <ralf@linux-mips.org>
Thu, 29 Jun 2017 00:42:27 +0000 (02:42 +0200)
commit8b0147a7e3a3d598a79f53b9f03f115468413c11
treeaf49815a6620de3289c2d5d9b0273f87251a7a6f
parent2a4504ef46762f343472ceca996a2f67f0e4819f
MIPS: Send SIGILL for R6 branches in `__compute_return_epc_for_insn'

Fix:

* commit 63c6151303db ("MIPS: Emulate the new MIPS R6 branch compact
(BC) instruction"),

* commit 3b0b4794bc0b ("MIPS: Emulate the new MIPS R6 BALC
instruction"),

* commit 03c86cf1fa62 ("MIPS: Emulate the new MIPS R6 BEQZC and JIC
instructions"),

* commit f136ca430a66 ("MIPS: Emulate the new MIPS R6 BNEZC and JIALC
instructions"),

* commit 266a7d481438 ("MIPS: Emulate the new MIPS R6 BOVC, BEQC and
BEQZALC instructions")

and send SIGILL rather than returning -SIGILL for R6 branch and jump
instructions.  Returning -SIGILL is never correct as the API defines
this function's result upon error to be -EFAULT and a signal actually
issued.

Fixes: 63c6151303db ("MIPS: Emulate the new MIPS R6 branch compact (BC) instruction")
Fixes: 3b0b4794bc0b ("MIPS: Emulate the new MIPS R6 BALC instruction")
Fixes: 03c86cf1fa62 ("MIPS: Emulate the new MIPS R6 BEQZC and JIC instructions")
Fixes: f136ca430a66 ("MIPS: Emulate the new MIPS R6 BNEZC and JIALC instructions")
Fixes: 266a7d481438 ("MIPS: Emulate the new MIPS R6 BOVC, BEQC and BEQZALC instructions")
Signed-off-by: Maciej W. Rozycki <macro@imgtec.com>
Cc: James Hogan <james.hogan@imgtec.com>
Cc: linux-mips@linux-mips.org
Cc: stable@vger.kernel.org # 3.19+
Patchwork: https://patchwork.linux-mips.org/patch/16399/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
arch/mips/kernel/branch.c