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Commit b68233e7 authored by Sonic Zhang's avatar Sonic Zhang Committed by Mike Frysinger
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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: default avatarSonic Zhang <sonic.zhang@analog.com>
Signed-off-by: default avatarMike Frysinger <vapier@gentoo.org>
parent 900de051

arch/blackfin/kernel/kgdb.c

+7 −1
Original line number Diff line number Diff line
@@ -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;