diff options
Diffstat (limited to 'arch/arm64/kernel/traps.c')
| -rw-r--r-- | arch/arm64/kernel/traps.c | 22 |
1 files changed, 16 insertions, 6 deletions
diff --git a/arch/arm64/kernel/traps.c b/arch/arm64/kernel/traps.c index f4ab8bc661da..ea40dc101433 100644 --- a/arch/arm64/kernel/traps.c +++ b/arch/arm64/kernel/traps.c @@ -38,6 +38,7 @@ #include <asm/esr.h> #include <asm/insn.h> #include <asm/traps.h> +#include <asm/stack_pointer.h> #include <asm/stacktrace.h> #include <asm/exception.h> #include <asm/system_misc.h> @@ -153,6 +154,14 @@ static void dump_backtrace(struct pt_regs *regs, struct task_struct *tsk) unsigned long irq_stack_ptr; int skip; + pr_debug("%s(regs = %pK tsk = %pK)\n", __func__, regs, tsk); + + if (!tsk) + tsk = current; + + if (!try_get_task_stack(tsk)) + return; + /* * Switching between stacks is valid when tracing current and in * non-preemptible context. @@ -223,6 +232,8 @@ static void dump_backtrace(struct pt_regs *regs, struct task_struct *tsk) stack + sizeof(struct pt_regs), false); } } + + put_task_stack(tsk); } void show_stack(struct task_struct *tsk, unsigned long *sp) @@ -238,10 +249,9 @@ void show_stack(struct task_struct *tsk, unsigned long *sp) #endif #define S_SMP " SMP" -static int __die(const char *str, int err, struct thread_info *thread, - struct pt_regs *regs) +static int __die(const char *str, int err, struct pt_regs *regs) { - struct task_struct *tsk = thread->task; + struct task_struct *tsk = current; static int die_counter; int ret; @@ -256,7 +266,8 @@ static int __die(const char *str, int err, struct thread_info *thread, print_modules(); __show_regs(regs); pr_emerg("Process %.*s (pid: %d, stack limit = 0x%p)\n", - TASK_COMM_LEN, tsk->comm, task_pid_nr(tsk), thread + 1); + TASK_COMM_LEN, tsk->comm, task_pid_nr(tsk), + end_of_stack(tsk)); if (!user_mode(regs) || in_interrupt()) { dump_backtrace(regs, tsk); @@ -321,7 +332,6 @@ static void oops_end(unsigned long flags, struct pt_regs *regs, int notify) */ void die(const char *str, struct pt_regs *regs, int err) { - struct thread_info *thread = current_thread_info(); enum bug_trap_type bug_type = BUG_TRAP_TYPE_NONE; unsigned long flags = oops_begin(); int ret; @@ -331,7 +341,7 @@ void die(const char *str, struct pt_regs *regs, int err) if (bug_type != BUG_TRAP_TYPE_NONE) str = "Oops - BUG"; - ret = __die(str, err, thread, regs); + ret = __die(str, err, regs); oops_end(flags, regs, ret); } |