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authorSonic Zhang <sonic.zhang@analog.com>2010-11-17 06:52:39 +0000
committerMike Frysinger <vapier@gentoo.org>2011-01-10 07:18:23 -0500
commitb68233e7f0126dfe59e1a064da9e37827c1f35ec (patch)
tree79f7891894b4a943a7166a42f8c404b1de281a39 /arch/blackfin/kernel
parent900de05182d520ff66378e74a7b18f7d9971a32d (diff)
downloadlinux-2.6.38-lt-ux500-b68233e7f0126dfe59e1a064da9e37827c1f35ec.tar.gz
Blackfin: kgdb: disable preempt schedule when running single step in kgdb
Otherwise, gdb continue operation after a breakpoint is hit may trap into endless breakpoint. Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Diffstat (limited to 'arch/blackfin/kernel')
-rw-r--r--arch/blackfin/kernel/kgdb.c8
1 files changed, 7 insertions, 1 deletions
diff --git a/arch/blackfin/kernel/kgdb.c b/arch/blackfin/kernel/kgdb.c
index e89ef34f744..eb92592fd80 100644
--- a/arch/blackfin/kernel/kgdb.c
+++ b/arch/blackfin/kernel/kgdb.c
@@ -347,15 +347,20 @@ void kgdb_roundup_cpu(int cpu, unsigned long flags)
#ifdef CONFIG_IPIPE
static unsigned long kgdb_arch_imask;
+#endif
void kgdb_post_primary_code(struct pt_regs *regs, int e_vector, int err_code)
{
+ if (kgdb_single_step)
+ preempt_enable();
+
+#ifdef CONFIG_IPIPE
if (kgdb_arch_imask) {
cpu_pda[raw_smp_processor_id()].ex_imask = kgdb_arch_imask;
kgdb_arch_imask = 0;
}
-}
#endif
+}
int kgdb_arch_handle_exception(int vector, int signo,
int err_code, char *remcom_in_buffer,
@@ -401,6 +406,7 @@ int kgdb_arch_handle_exception(int vector, int signo,
*/
kgdb_single_step = i + 1;
+ preempt_disable();
#ifdef CONFIG_IPIPE
kgdb_arch_imask = cpu_pda[raw_smp_processor_id()].ex_imask;
cpu_pda[raw_smp_processor_id()].ex_imask = 0;