diff options
| author | Peter Maydell <peter.maydell@linaro.org> | 2014-09-12 19:04:17 +0100 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2014-10-06 14:25:43 +0100 |
| commit | 2472b6c07bb50179019589af1c22f43935ab7f5c (patch) | |
| tree | a9ed9fa651dc7a884600cfef65da71211eb6031f /target-xtensa/cpu.c | |
| parent | 507ef2f9fab3e67ac6fefda4e20db7fc5f2bc186 (diff) | |
gdbstub: Allow target CPUs to specify watchpoint STOP_BEFORE_ACCESS flag
GDB assumes that watchpoint set via the gdbstub remote protocol will
behave in the same way as hardware watchpoints for the target. In
particular, whether the CPU stops with the PC before or after the insn
which triggers the watchpoint is target dependent. Allow guest CPU
code to specify which behaviour to use. This fixes a bug where with
guest CPUs which stop before the accessing insn GDB would manually
step forward over what it thought was the insn and end up one insn
further forward than it should be.
We set this flag for the CPU architectures which set
gdbarch_have_nonsteppable_watchpoint in gdb 7.7:
ARM, CRIS, LM32, MIPS and Xtensa.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Tested-by: Max Filippov <jcmvbkbc@gmail.com>
Tested-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Tested-by: Michael Walle <michael@walle.cc> (for lm32)
Message-id: 1410545057-14014-1-git-send-email-peter.maydell@linaro.org
Diffstat (limited to 'target-xtensa/cpu.c')
| -rw-r--r-- | target-xtensa/cpu.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/target-xtensa/cpu.c b/target-xtensa/cpu.c index 51c41d526d..6a5414f815 100644 --- a/target-xtensa/cpu.c +++ b/target-xtensa/cpu.c @@ -147,6 +147,7 @@ static void xtensa_cpu_class_init(ObjectClass *oc, void *data) cc->set_pc = xtensa_cpu_set_pc; cc->gdb_read_register = xtensa_cpu_gdb_read_register; cc->gdb_write_register = xtensa_cpu_gdb_write_register; + cc->gdb_stop_before_watchpoint = true; #ifndef CONFIG_USER_ONLY cc->do_unaligned_access = xtensa_cpu_do_unaligned_access; cc->get_phys_page_debug = xtensa_cpu_get_phys_page_debug; |