diff options
| author | K.Prasad <prasad@linux.vnet.ibm.com> | 2009-06-01 23:47:06 +0530 |
|---|---|---|
| committer | Frederic Weisbecker <fweisbec@gmail.com> | 2009-06-02 22:47:00 +0200 |
| commit | 62edab9056a6cf0c9207339c8892c923a5217e45 (patch) | |
| tree | 2becd775fdc2a25df3daacf69d80685b251fbed9 /arch/x86/kernel/kgdb.c | |
| parent | 0722db015c246204044299eae3b02d18d3ca4faf (diff) | |
hw-breakpoints: reset bits in dr6 after the corresponding exception is handled
This patch resets the bit in dr6 after the corresponding exception is
handled in code, so that we keep a clean track of the current virtual debug
status register.
[ Impact: keep track of breakpoints triggering completion ]
Signed-off-by: K.Prasad <prasad@linux.vnet.ibm.com>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Diffstat (limited to 'arch/x86/kernel/kgdb.c')
| -rw-r--r-- | arch/x86/kernel/kgdb.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/x86/kernel/kgdb.c b/arch/x86/kernel/kgdb.c index b1f4dffb919e..f820b73c7f28 100644 --- a/arch/x86/kernel/kgdb.c +++ b/arch/x86/kernel/kgdb.c @@ -43,6 +43,7 @@ #include <linux/smp.h> #include <linux/nmi.h> +#include <asm/debugreg.h> #include <asm/apicdef.h> #include <asm/system.h> @@ -434,6 +435,11 @@ single_step_cont(struct pt_regs *regs, struct die_args *args) "resuming...\n"); kgdb_arch_handle_exception(args->trapnr, args->signr, args->err, "c", "", regs); + /* + * Reset the BS bit in dr6 (pointed by args->err) to + * denote completion of processing + */ + (*(unsigned long *)ERR_PTR(args->err)) &= ~DR_STEP; return NOTIFY_STOP; } |