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platform_kernel-5.15
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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: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
This commit is contained in:
Sonic Zhang 2010-11-17 06:52:39 +00:00 committed by Mike Frysinger
parent 900de05182
commit b68233e7f0
1 changed files with 7 additions and 1 deletions
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8
arch/blackfin/kernel/kgdb.c
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@ -347,15 +347,20 @@ void kgdb_roundup_cpu(int cpu, unsigned long flags)
#ifdef CONFIG_IPIPE #ifdef CONFIG_IPIPE
static unsigned long kgdb_arch_imask; static unsigned long kgdb_arch_imask;
#endif
void kgdb_post_primary_code(struct pt_regs *regs, int e_vector, int err_code) 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) { if (kgdb_arch_imask) {
cpu_pda[raw_smp_processor_id()].ex_imask = kgdb_arch_imask; cpu_pda[raw_smp_processor_id()].ex_imask = kgdb_arch_imask;
kgdb_arch_imask = 0; kgdb_arch_imask = 0;
} }
}
#endif #endif
}
int kgdb_arch_handle_exception(int vector, int signo, int kgdb_arch_handle_exception(int vector, int signo,
int err_code, char *remcom_in_buffer, 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; kgdb_single_step = i + 1;
preempt_disable();
#ifdef CONFIG_IPIPE #ifdef CONFIG_IPIPE
kgdb_arch_imask = cpu_pda[raw_smp_processor_id()].ex_imask; kgdb_arch_imask = cpu_pda[raw_smp_processor_id()].ex_imask;
cpu_pda[raw_smp_processor_id()].ex_imask = 0; cpu_pda[raw_smp_processor_id()].ex_imask = 0;