/*
* kgdb_handle_exception() - main entry point from a kernel exception
*
* Locking hierarchy:
* interface locks, if any (begin_session)
* kgdb lock (kgdb_active)
*/
int
kgdb_handle_exception(int evector, int signo, int ecode, struct pt_regs *regs)
{
struct kgdb_state kgdb_var;
struct kgdb_state *ks = &kgdb_var;
int ret = 0;
if (arch_kgdb_ops.enable_nmi)
arch_kgdb_ops.enable_nmi(0);
if (unlikely(signo != SIGTRAP && !break_on_exception))
return 1;
ks->cpu = raw_smp_processor_id();
ks->ex_vector = evector;
ks->signo = signo;
ks->err_code = ecode;
ks->kgdb_usethreadid = 0;
ks->linux_regs = regs;
if (kgdb_reenter_check(ks))
goto out; /* Ouch, double exception ! */
if (kgdb_info[ks->cpu].enter_kgdb != 0)
goto out;
ret = kgdb_cpu_enter(ks, regs, DCPU_WANT_MASTER);
out:
if (arch_kgdb_ops.enable_nmi)
arch_kgdb_ops.enable_nmi(1);
return ret;
}
/*
* kgdb_handle_exception() - main entry point from a kernel exception
*
* Locking hierarchy:
* interface locks, if any (begin_session)
* kgdb lock (kgdb_active)
*/
int
kgdb_handle_exception(int evector, int signo, int ecode, struct pt_regs *regs)
{
struct kgdb_state kgdb_var;
struct kgdb_state *ks = &kgdb_var;
ks->cpu = raw_smp_processor_id();
ks->ex_vector = evector;
ks->signo = signo;
ks->err_code = ecode;
ks->kgdb_usethreadid = 0;
ks->linux_regs = regs;
if (kgdb_reenter_check(ks))
return 0; /* Ouch, double exception ! */
if (kgdb_info[ks->cpu].enter_kgdb != 0)
return 0;
return kgdb_cpu_enter(ks, regs, DCPU_WANT_MASTER);
}
/*
* kgdb_handle_exception() - main entry point from a kernel exception
*
* Locking hierarchy:
* interface locks, if any (begin_session)
* kgdb lock (kgdb_active)
*/
int
kgdb_handle_exception(int evector, int signo, int ecode, struct pt_regs *regs)
{
struct kgdb_state kgdb_var;
struct kgdb_state *ks = &kgdb_var;
int ret;
ks->cpu = raw_smp_processor_id();
ks->ex_vector = evector;
ks->signo = signo;
ks->err_code = ecode;
ks->kgdb_usethreadid = 0;
ks->linux_regs = regs;
if (kgdb_reenter_check(ks))
return 0; /* Ouch, double exception ! */
kgdb_info[ks->cpu].exception_state |= DCPU_WANT_MASTER;
ret = kgdb_cpu_enter(ks, regs);
kgdb_info[ks->cpu].exception_state &= ~(DCPU_WANT_MASTER |
DCPU_IS_SLAVE);
return ret;
}
/*
* kgdb_handle_exception() - main entry point from a kernel exception
*
* Locking hierarchy:
* interface locks, if any (begin_session)
* kgdb lock (kgdb_active)
*/
int
kgdb_handle_exception(int evector, int signo, int ecode, struct pt_regs *regs)
{
struct kgdb_state kgdb_var;
struct kgdb_state *ks = &kgdb_var;
int ret = 0;
if (arch_kgdb_ops.enable_nmi)
arch_kgdb_ops.enable_nmi(0);
/*
* Avoid entering the debugger if we were triggered due to an oops
* but panic_timeout indicates the system should automatically
* reboot on panic. We don't want to get stuck waiting for input
* on such systems, especially if its "just" an oops.
*/
if (signo != SIGTRAP && panic_timeout)
return 1;
memset(ks, 0, sizeof(struct kgdb_state));
ks->cpu = raw_smp_processor_id();
ks->ex_vector = evector;
ks->signo = signo;
ks->err_code = ecode;
ks->linux_regs = regs;
if (kgdb_reenter_check(ks))
goto out; /* Ouch, double exception ! */
if (kgdb_info[ks->cpu].enter_kgdb != 0)
goto out;
ret = kgdb_cpu_enter(ks, regs, DCPU_WANT_MASTER);
out:
if (arch_kgdb_ops.enable_nmi)
arch_kgdb_ops.enable_nmi(1);
return ret;
}
