• Christoph Hellwig's avatar
    arm: use generic ptrace_resume code · 440e6ca7
    Christoph Hellwig authored
    Use the generic ptrace_resume code for PTRACE_SYSCALL, PTRACE_CONT,
    PTRACE_KILL and PTRACE_SINGLESTEP.  This implies defining
    arch_has_single_step in <asm/ptrace.h> and implementing the
    user_enable_single_step and user_disable_single_step functions, which also
    causes the breakpoint information to be cleared on fork, which could be
    considered a bug fix.
    
    Also the TIF_SYSCALL_TRACE thread flag is now cleared on PTRACE_KILL which
    it previously wasn't and the single stepping disable only happens if the
    tracee process isn't a zombie yet, which is consistent with all
    architectures using the modern ptrace code.
    Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
    Cc: Oleg Nesterov <oleg@redhat.com>
    Cc: Roland McGrath <roland@redhat.com>
    Cc: Russell King <rmk@arm.linux.org.uk>
    Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
    Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
    440e6ca7
ptrace.c 18.9 KB