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SubjectRe: [PATCH V2 0/6] ARM64: Uprobe support added
Hi Catalin,

Please let me know if everything else other than is_trap_insn() looks
fine to you. May be I can work well in time. It would be great if we
can make it into v4.9.


~Pratyush


On Tue, Sep 27, 2016 at 1:17 PM, Pratyush Anand <panand@redhat.com> wrote:
> Changes since v1:
> * Exposed sync_icache_aliases() and used that in stead of flush_uprobe_xol_access()
> * Assigned 0x0005 to BRK64_ESR_UPROBES in stead of 0x0008
> * moved uprobe_opcode_t from probes.h to uprobes.h
> * Assigned 4 to TIF_UPROBE instead of 5
> * Assigned AARCH64_INSN_SIZE to UPROBE_SWBP_INSN_SIZE instead of hard code 4.
> * Removed saved_fault_code from struct arch_uprobe_task
> * Removed preempt_dis(en)able() from arch_uprobe_copy_ixol()
> * Removed case INSN_GOOD from arch_uprobe_analyze_insn()
> * Now we do check that probe point is not for a 32 bit task.
> * Return a false positive from is_tarp_insn()
> * Changes for rebase conflict resolution
>
> V1 was here: https://lkml.org/lkml/2016/8/2/29
> Patches have been rebased on next-20160927, so that there would be no
> conflicts with other arm64/for-next/core patches.
>
> Patches have been tested for following:
> 1. Step-able instructions, like sub, ldr, add etc.
> 2. Simulation-able like ret, cbnz, cbz etc.
> 3. uretprobe
> 4. Reject-able instructions like sev, wfe etc.
> 5. trapped and abort xol path
> 6. probe at unaligned user address.
> 7. longjump test cases
>
> aarch32 task probing is not yet supported.
>
> Pratyush Anand (6):
> arm64: kprobe: protect/rename few definitions to be reused by uprobe
> arm64: kgdb_step_brk_fn: ignore other's exception
> arm64: Handle TRAP_TRACE for user mode as well
> arm64: Handle TRAP_BRKPT for user mode as well
> arm64: introduce mm context flag to keep 32 bit task information
> arm64: Add uprobe support
>
> arch/arm64/Kconfig | 3 +
> arch/arm64/include/asm/cacheflush.h | 1 +
> arch/arm64/include/asm/debug-monitors.h | 3 +
> arch/arm64/include/asm/elf.h | 12 +-
> arch/arm64/include/asm/mmu.h | 1 +
> arch/arm64/include/asm/probes.h | 19 +--
> arch/arm64/include/asm/ptrace.h | 8 ++
> arch/arm64/include/asm/thread_info.h | 5 +-
> arch/arm64/include/asm/uprobes.h | 36 ++++++
> arch/arm64/kernel/debug-monitors.c | 40 +++---
> arch/arm64/kernel/kgdb.c | 3 +
> arch/arm64/kernel/probes/Makefile | 2 +
> arch/arm64/kernel/probes/decode-insn.c | 32 ++---
> arch/arm64/kernel/probes/decode-insn.h | 8 +-
> arch/arm64/kernel/probes/kprobes.c | 36 +++---
> arch/arm64/kernel/probes/uprobes.c | 221 ++++++++++++++++++++++++++++++++
> arch/arm64/kernel/signal.c | 3 +
> arch/arm64/mm/flush.c | 2 +-
> 18 files changed, 371 insertions(+), 64 deletions(-)
> create mode 100644 arch/arm64/include/asm/uprobes.h
> create mode 100644 arch/arm64/kernel/probes/uprobes.c
>
> --
> 2.7.4
>

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