diff options
Diffstat (limited to 'arch/arm64/kernel/probes/decode-insn.c')
| -rw-r--r-- | arch/arm64/kernel/probes/decode-insn.c | 33 |
1 files changed, 32 insertions, 1 deletions
diff --git a/arch/arm64/kernel/probes/decode-insn.c b/arch/arm64/kernel/probes/decode-insn.c index 0518df1cbde8..f7931d900bca 100644 --- a/arch/arm64/kernel/probes/decode-insn.c +++ b/arch/arm64/kernel/probes/decode-insn.c @@ -21,6 +21,7 @@ #include <asm/sections.h> #include "decode-insn.h" +#include "simulate-insn.h" static bool __kprobes aarch64_insn_is_steppable(u32 insn) { @@ -74,6 +75,7 @@ static bool __kprobes aarch64_insn_is_steppable(u32 insn) /* Return: * INSN_REJECTED If instruction is one not allowed to kprobe, * INSN_GOOD If instruction is supported and uses instruction slot, + * INSN_GOOD_NO_SLOT If instruction is supported but doesn't use its slot. */ static enum kprobe_insn __kprobes arm_probe_decode_insn(kprobe_opcode_t insn, struct arch_specific_insn *asi) @@ -84,8 +86,37 @@ arm_probe_decode_insn(kprobe_opcode_t insn, struct arch_specific_insn *asi) */ if (aarch64_insn_is_steppable(insn)) return INSN_GOOD; - else + + if (aarch64_insn_is_bcond(insn)) { + asi->handler = simulate_b_cond; + } else if (aarch64_insn_is_cbz(insn) || + aarch64_insn_is_cbnz(insn)) { + asi->handler = simulate_cbz_cbnz; + } else if (aarch64_insn_is_tbz(insn) || + aarch64_insn_is_tbnz(insn)) { + asi->handler = simulate_tbz_tbnz; + } else if (aarch64_insn_is_adr_adrp(insn)) { + asi->handler = simulate_adr_adrp; + } else if (aarch64_insn_is_b(insn) || + aarch64_insn_is_bl(insn)) { + asi->handler = simulate_b_bl; + } else if (aarch64_insn_is_br(insn) || + aarch64_insn_is_blr(insn) || + aarch64_insn_is_ret(insn)) { + asi->handler = simulate_br_blr_ret; + } else if (aarch64_insn_is_ldr_lit(insn)) { + asi->handler = simulate_ldr_literal; + } else if (aarch64_insn_is_ldrsw_lit(insn)) { + asi->handler = simulate_ldrsw_literal; + } else { + /* + * Instruction cannot be stepped out-of-line and we don't + * (yet) simulate it. + */ return INSN_REJECTED; + } + + return INSN_GOOD_NO_SLOT; } static bool __kprobes |