diff options
Diffstat (limited to 'arch/mips/kernel/branch.c')
| -rw-r--r-- | arch/mips/kernel/branch.c | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/arch/mips/kernel/branch.c b/arch/mips/kernel/branch.c index f5c68483c98e..12c718181e5e 100644 --- a/arch/mips/kernel/branch.c +++ b/arch/mips/kernel/branch.c @@ -866,3 +866,37 @@ unaligned: force_sig(SIGBUS, current); return -EFAULT; } + +#if (defined CONFIG_KPROBES) || (defined CONFIG_UPROBES) + +int __insn_is_compact_branch(union mips_instruction insn) +{ + if (!cpu_has_mips_r6) + return 0; + + switch (insn.i_format.opcode) { + case blezl_op: + case bgtzl_op: + case blez_op: + case bgtz_op: + /* + * blez[l] and bgtz[l] opcodes with non-zero rt + * are MIPS R6 compact branches + */ + if (insn.i_format.rt) + return 1; + break; + case bc6_op: + case balc6_op: + case pop10_op: + case pop30_op: + case pop66_op: + case pop76_op: + return 1; + } + + return 0; +} +EXPORT_SYMBOL_GPL(__insn_is_compact_branch); + +#endif /* CONFIG_KPROBES || CONFIG_UPROBES */ |