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MIPS: Handle microMIPS jumps in the same way as MIPS32/MIPS64 jumps

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commit 096a0de427ea333f56f0ee00328cff2a2731bcf1 upstream.

is_jump_ins() checks for plain jump ("j") instructions since commit
e7438c4b893e ("MIPS: Fix sibling call handling in get_frame_info") but
that commit didn't make the same change to the microMIPS code, leaving
it inconsistent with the MIPS32/MIPS64 code. Handle the microMIPS
encoding of the jump instruction too such that it behaves consistently.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Fixes: e7438c4b893e ("MIPS: Fix sibling call handling in get_frame_info")
Cc: Tony Wu <tung7970@gmail.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/14533/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Paul Burton 2016-11-07 15:07:07 +00:00 committed by Greg Kroah-Hartman
parent 209ad1941d
commit 8d06cbd365
1 changed files with 2 additions and 0 deletions
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2
arch/mips/kernel/process.c
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@ -293,6 +293,8 @@ static inline int is_jump_ins(union mips_instruction *ip)
return 0;
}
if (ip->j_format.opcode == mm_j32_op)
return 1;
if (ip->j_format.opcode == mm_jal32_op)
return 1;
if (ip->r_format.opcode != mm_pool32a_op ||