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author | Maciej W. Rozycki <macro@imgtec.com> | 2017-06-16 00:08:29 +0100 |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-07-27 15:06:08 -0700 |
commit | e5bf16f0294588cd238b2246f89385a9ccc35079 (patch) | |
tree | 4152d0a1e5a89c81ee0191802ced97a7df786cb7 /arch/mips | |
parent | 4c7d28c1e99d1ce1786cb5e10bc178eec4ba0ccf (diff) | |
download | linux-stable-e5bf16f0294588cd238b2246f89385a9ccc35079.tar.gz linux-stable-e5bf16f0294588cd238b2246f89385a9ccc35079.tar.bz2 linux-stable-e5bf16f0294588cd238b2246f89385a9ccc35079.zip |
MIPS: Send SIGILL for BPOSGE32 in `__compute_return_epc_for_insn'
commit 7b82c1058ac1f8f8b9f2b8786b1f710a57a870a8 upstream.
Fix commit e50c0a8fa60d ("Support the MIPS32 / MIPS64 DSP ASE.") and
send SIGILL rather than SIGBUS whenever an unimplemented BPOSGE32 DSP
ASE instruction has been encountered in `__compute_return_epc_for_insn'
as our Reserved Instruction exception handler would in response to an
attempt to actually execute the instruction. Sending SIGBUS only makes
sense for the unaligned PC case, since moved to `__compute_return_epc'.
Adjust function documentation accordingly, correct formatting and use
`pr_info' rather than `printk' as the other exit path already does.
Fixes: e50c0a8fa60d ("Support the MIPS32 / MIPS64 DSP ASE.")
Signed-off-by: Maciej W. Rozycki <macro@imgtec.com>
Cc: James Hogan <james.hogan@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/16396/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch/mips')
-rw-r--r-- | arch/mips/kernel/branch.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/arch/mips/kernel/branch.c b/arch/mips/kernel/branch.c index 59fe7725a610..16749f184367 100644 --- a/arch/mips/kernel/branch.c +++ b/arch/mips/kernel/branch.c @@ -399,7 +399,7 @@ int __MIPS16e_compute_return_epc(struct pt_regs *regs) * * @regs: Pointer to pt_regs * @insn: branch instruction to decode - * @returns: -EFAULT on error and forces SIGBUS, and on success + * @returns: -EFAULT on error and forces SIGILL, and on success * returns 0 or BRANCH_LIKELY_TAKEN as appropriate after * evaluating the branch. * @@ -844,8 +844,9 @@ int __compute_return_epc_for_insn(struct pt_regs *regs, return ret; sigill_dsp: - printk("%s: DSP branch but not DSP ASE - sending SIGBUS.\n", current->comm); - force_sig(SIGBUS, current); + pr_info("%s: DSP branch but not DSP ASE - sending SIGILL.\n", + current->comm); + force_sig(SIGILL, current); return -EFAULT; sigill_r6: pr_info("%s: R2 branch but r2-to-r6 emulator is not preset - sending SIGILL.\n", |