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From: sergiodj+buildbot@redhat.com To: gdb-testers@sourceware.org Subject: [binutils-gdb] aarch64 multi-arch part 6: HW breakpoint on unaligned address Date: Thu, 15 Oct 2015 14:19:00 -0000 [thread overview] Message-ID: <8d689ee570e7c4c61231b919d5b6a34c20414c43@gdb-build> (raw) *** TEST RESULTS FOR COMMIT 8d689ee570e7c4c61231b919d5b6a34c20414c43 *** Author: Yao Qi <yao.qi@linaro.org> Branch: master Commit: 8d689ee570e7c4c61231b919d5b6a34c20414c43 aarch64 multi-arch part 6: HW breakpoint on unaligned address Nowadays, both aarch64 GDB and linux kernel assumes that address for setting breakpoint should be 4-byte aligned. However that is not true after we support multi-arch, because thumb instruction can be at 2-byte aligned address. Patch http://lists.infradead.org/pipermail/linux-arm-kernel/2015-October/375141.html to linux kernel is to teach kernel to handle 2-byte aligned address for HW breakpoint, while this patch is to teach aarch64 GDB handle 2-byte aligned address. First of all, we call gdbarch_breakpoint_from_pc to get the instruction length rather than using hard-coded 4. Secondly, in GDBserver, we set length back to 2 if it is 3, because GDB encode 3 in it to indicate it is a 32-bit thumb breakpoint. Then we relax the address alignment check from 4-byte aligned to 2-byte aligned. This patch enables some tests (such as gdb.base/break-idempotent.exp, gdb.base/cond-eval-mode.exp, gdb.base/watchpoint-reuse-slot.exp,) and fixes many fails (such as gdb.base/hbreak2.exp) when the program is compiled in thumb mode on aarch64. Regression tested on aarch64-linux, both native and gdbserver. This is the last patch of multi-arch work. gdb: 2015-10-15 Yao Qi <yao.qi@linaro.org> * aarch64-linux-nat.c (aarch64_linux_insert_hw_breakpoint): Call gdbarch_breakpoint_from_pc to instruction length. (aarch64_linux_remove_hw_breakpoint): Likewise. * common/common-regcache.h (regcache_register_size): Declare. * nat/aarch64-linux-hw-point.c: Include "common-regcache.h". (aarch64_point_is_aligned): Set alignment to 2 for breakpoint if the process is 32bit, otherwise set alignment to 4. (aarch64_handle_breakpoint): Update comments. * regcache.c (regcache_register_size): New function. gdb/gdbserver: 2015-10-15 Yao Qi <yao.qi@linaro.org> * linux-aarch64-low.c (aarch64_insert_point): Set len to 2 if it is 3. (aarch64_remove_point): Likewise. * regcache.c (regcache_register_size): New function.
next reply other threads:[~2015-10-15 14:19 UTC|newest] Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top 2015-10-15 14:19 sergiodj+buildbot [this message] 2015-10-15 14:20 ` Failures on Debian-s390x-native-gdbserver-m64, branch master sergiodj+buildbot 2015-10-15 14:23 ` Failures on Fedora-i686, " sergiodj+buildbot 2015-10-15 14:24 ` Failures on Fedora-x86_64-m32, " sergiodj+buildbot 2015-10-15 14:25 ` Failures on Fedora-x86_64-native-extended-gdbserver-m32, " sergiodj+buildbot 2015-10-15 14:25 ` Failures on Fedora-x86_64-cc-with-index, " sergiodj+buildbot 2015-10-15 14:33 ` Failures on AIX-POWER7-plain, " sergiodj+buildbot 2015-10-15 14:36 ` Failures on Debian-s390x-native-extended-gdbserver-m64, " sergiodj+buildbot 2015-10-15 14:36 ` Failures on Fedora-x86_64-native-gdbserver-m64, " sergiodj+buildbot 2015-10-15 14:36 ` Failures on Fedora-x86_64-native-extended-gdbserver-m64, " sergiodj+buildbot 2015-10-15 14:40 ` Failures on Fedora-x86_64-native-gdbserver-m32, " sergiodj+buildbot 2015-10-15 15:18 ` Failures on Debian-i686, " sergiodj+buildbot 2015-10-15 15:36 ` Failures on Debian-i686-native-gdbserver, " sergiodj+buildbot 2015-10-15 15:42 ` Failures on Debian-x86_64-native-extended-gdbserver-m64, " sergiodj+buildbot 2015-10-15 16:00 ` Failures on Debian-i686-native-extended-gdbserver, " sergiodj+buildbot 2015-10-15 16:26 ` Failures on Fedora-ppc64be-m64, " sergiodj+buildbot 2015-10-15 16:43 ` Failures on Fedora-ppc64be-native-gdbserver-m64, " sergiodj+buildbot 2015-10-15 17:03 ` Failures on Fedora-ppc64be-native-extended-gdbserver-m64, " sergiodj+buildbot 2015-10-15 17:54 ` Failures on Fedora-ppc64le-native-extended-gdbserver-m64, " sergiodj+buildbot 2015-10-15 18:25 ` Failures on Fedora-ppc64le-native-gdbserver-m64, " sergiodj+buildbot
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