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authorMaciej W. Rozycki <macro@imgtec.com>2016-03-04 01:44:28 +0000
committerRalf Baechle <ralf@linux-mips.org>2016-04-03 12:32:09 +0200
commit3b143cca6e1397188f507a6c727f4108861ceb8b (patch)
tree18d40c6731a2f8f385c3f2b6f285cde8408e235c /Documentation
parent748ac56bb9533f867b25325a805d64f52a1a3a88 (diff)
downloadlinux-3b143cca6e1397188f507a6c727f4108861ceb8b.tar.bz2
MIPS: traps: Correct the SIGTRAP debug ABI in `do_watch' and `do_trap_or_bp'
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: Maciej 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: Ralf Baechle <ralf@linux-mips.org>
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