diff options
| author | Ravi Bangoria <ravi.bangoria@linux.ibm.com> | 2019-10-17 15:02:00 +0530 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2019-11-13 16:58:03 +1100 |
| commit | c3f68b0478e7c07769394d17ebde0626600a7e1d (patch) | |
| tree | c8c2545d2cf02494492a4b68199f7710d6e73feb /arch/powerpc/include/asm/hw_breakpoint.h | |
| parent | b57aeab811db07295f646808b1b17c312d17f57d (diff) | |
| download | linux-c3f68b0478e7c07769394d17ebde0626600a7e1d.tar.bz2 | |
powerpc/watchpoint: Fix ptrace code that muck around with address/len
ptrace_set_debugreg() does not consider new length while overwriting
the watchpoint. Fix that. ppc_set_hwdebug() aligns watchpoint address
to doubleword boundary but does not change the length. If address
range is crossing doubleword boundary and length is less then 8, we
will lose samples from second doubleword. So fix that as well.
Signed-off-by: Ravi Bangoria <ravi.bangoria@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20191017093204.7511-4-ravi.bangoria@linux.ibm.com
Diffstat (limited to 'arch/powerpc/include/asm/hw_breakpoint.h')
| -rw-r--r-- | arch/powerpc/include/asm/hw_breakpoint.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/powerpc/include/asm/hw_breakpoint.h b/arch/powerpc/include/asm/hw_breakpoint.h index ea91ac7f5a27..27ac6f5d2891 100644 --- a/arch/powerpc/include/asm/hw_breakpoint.h +++ b/arch/powerpc/include/asm/hw_breakpoint.h @@ -34,6 +34,8 @@ struct arch_hw_breakpoint { #define HW_BRK_TYPE_PRIV_ALL (HW_BRK_TYPE_USER | HW_BRK_TYPE_KERNEL | \ HW_BRK_TYPE_HYP) +#define HW_BREAKPOINT_ALIGN 0x7 + #define DABR_MAX_LEN 8 #define DAWR_MAX_LEN 512 @@ -48,8 +50,6 @@ struct pmu; struct perf_sample_data; struct task_struct; -#define HW_BREAKPOINT_ALIGN 0x7 - extern int hw_breakpoint_slots(int type); extern int arch_bp_generic_fields(int type, int *gen_bp_type); extern int arch_check_bp_in_kernelspace(struct arch_hw_breakpoint *hw); |