]> git.baikalelectronics.ru Git - kernel.git/commit
MIPS: Send SIGILL for linked branches in `__compute_return_epc_for_insn'
authorMaciej W. Rozycki <macro@imgtec.com>
Thu, 15 Jun 2017 23:12:53 +0000 (00:12 +0100)
committerRalf Baechle <ralf@linux-mips.org>
Thu, 29 Jun 2017 00:42:27 +0000 (02:42 +0200)
commit2a4504ef46762f343472ceca996a2f67f0e4819f
treea1699bfcbaf8e1ffc1748d999f4002bb5b212fbc
parent770e9a00b2852ed840b8398c3fe30d6a37cfc623
MIPS: Send SIGILL for linked branches in `__compute_return_epc_for_insn'

Fix commit 2a1b8235994f ("MIPS: kernel: branch: Do not emulate the
branch likelies on MIPS R6") and also send SIGILL rather than returning
-SIGILL for BLTZAL, BLTZALL, BGEZAL and BGEZALL instruction encodings no
longer supported in R6, except where emulated.  Returning -SIGILL is
never correct as the API defines this function's result upon error to be
-EFAULT and a signal actually issued.

Fixes: 2a1b8235994f ("MIPS: kernel: branch: Do not emulate the branch likelies on MIPS R6")
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/16398/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
arch/mips/kernel/branch.c