[PATCH 1/3] uprobes: add trap variant helper
oleg at redhat.com
Sat Mar 23 01:54:06 EST 2013
On 03/22, Ananth N Mavinakayanahalli wrote:
> + * is_trap_insn - check if instruction is breakpoint instruction.
> + * @insn: instruction to be checked.
> + * Default implementation of is_trap_insn
> + * Returns true if @insn is a breakpoint instruction.
> + *
> + * This function is needed for the case where an architecture has multiple
> + * trap instructions (like powerpc).
> + */
> +bool __weak is_trap_insn(uprobe_opcode_t *insn)
> + return is_swbp_insn(insn);
OK, thanks, the whole series looks fine, just one note...
My patch also changed prepare_uprobe() to use is_trap_insn(), and I think
this is right. Exactly because of 3/3 which removes is_trap() from
If the original insn is_trap(), we do not want to singlestep it and get
another trap after we hit handle_swbp().
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