• Maciej W. Rozycki's avatar
    MIPS: traps: Correct the SIGTRAP debug ABI in `do_watch' and `do_trap_or_bp' · 3b143cca
    Maciej W. Rozycki authored
    Follow our own rules set in <asm/siginfo.h> for SIGTRAP signals issued
    from `do_watch' and `do_trap_or_bp' by setting the signal code to
    TRAP_HWBKPT and TRAP_BRKPT respectively, for Watch exceptions and for
    those Breakpoint exceptions whose originating BREAK instruction's code
    does not have a special meaning.  Keep Trap exceptions unaffected as
    these are not debug events.
    
    No existing user software is expected to examine signal codes for these
    signals as SI_KERNEL has been always used here.  This change makes the
    MIPS port more like other Linux ports, which reduces the complexity and
    provides for performance improvement in GDB.
    Signed-off-by: default avatarMaciej W. Rozycki <macro@imgtec.com>
    Cc: Pedro Alves <palves@redhat.com>
    Cc: Luis Machado <lgustavo@codesourcery.com>
    Cc: linux-mips@linux-mips.org
    Cc: gdb@sourceware.org
    Patchwork: https://patchwork.linux-mips.org/patch/12758/Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
    3b143cca
traps.c 58 KB