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The x86 implement hardware breakpoint to accelerate the tracing syscall procedure instead of `ptrace(PTRACE_SYSCALL)`. The arm64 has the same capability according to <<Learn the architecture: Armv8-A self-hosted debug>>[[1]]. <<Arm Architecture Reference Manual for A-profile architecture>[[2]] illustrates the usage detailly: - D2.8 Breakpoint Instruction exceptions - D2.9 Breakpoint exceptions - D13.3.2 DBGBCR<n>_EL1, Debug Breakpoint Control Registers, n Note: [1]: https://developer.arm.com/documentation/102120/0100 [2]: https://developer.arm.com/documentation/ddi0487/latest Signed-off-by: fu.lin <fulin10@huawei.com> Signed-off-by: Andrei Vagin <avagin@gmail.com> |
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