(2015/02/20 19:26), Ingo Molnar wrote: > > * Petr Mladek <[email protected]> wrote: > >> can_probe() checks if the given address points to the >> beginning of an instruction. It analyzes all the >> instructions from the beginning of the function until the >> given address. The code might be modified by another >> Kprobe. In this case, the current code is read into a >> buffer, int3 breakpoint is replaced by the saved opcode >> in the buffer, and can_probe() analyzes the buffer >> instead. >> >> [...] > > Had to drop this patch due to build failures on 32-bit x86: > > arch/x86/kernel/kprobes/core.c:258:40: error: ‘MCOUNT_INSN_SIZE’ undeclared > (first use in this function)
Oops, MCOUNT_INSN_SIZE actually depends on CONFIG_FUNCTION_TRACER... I think we can use 5 instead of that since we are copying NOP_ATOMIC5. Thank you, -- Masami HIRAMATSU Software Platform Research Dept. Linux Technology Research Center Hitachi, Ltd., Yokohama Research Laboratory E-mail: [email protected] -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
