diff options
| -rw-r--r-- | arch/parisc/Kconfig | 2 | ||||
| -rw-r--r-- | arch/parisc/kernel/stacktrace.c | 30 |
2 files changed, 15 insertions, 17 deletions
diff --git a/arch/parisc/Kconfig b/arch/parisc/Kconfig index 27a8b49af11f..aee25beb2d00 100644 --- a/arch/parisc/Kconfig +++ b/arch/parisc/Kconfig @@ -13,6 +13,8 @@ config PARISC select ARCH_NO_SG_CHAIN select ARCH_SUPPORTS_HUGETLBFS if PA20 select ARCH_SUPPORTS_MEMORY_FAILURE + select ARCH_STACKWALK + select HAVE_RELIABLE_STACKTRACE select DMA_OPS select RTC_CLASS select RTC_DRV_GENERIC diff --git a/arch/parisc/kernel/stacktrace.c b/arch/parisc/kernel/stacktrace.c index 34bf6d6bf6e8..6b4ca91932cf 100644 --- a/arch/parisc/kernel/stacktrace.c +++ b/arch/parisc/kernel/stacktrace.c @@ -2,45 +2,41 @@ /* * Stack trace management functions * - * Copyright (C) 2009 Helge Deller <deller@gmx.de> + * Copyright (C) 2009-2021 Helge Deller <deller@gmx.de> * based on arch/x86/kernel/stacktrace.c by Ingo Molnar <mingo@redhat.com> * and parisc unwind functions by Randolph Chung <tausq@debian.org> * * TODO: Userspace stacktrace (CONFIG_USER_STACKTRACE_SUPPORT) */ -#include <linux/module.h> #include <linux/stacktrace.h> #include <asm/unwind.h> -static void dump_trace(struct task_struct *task, struct stack_trace *trace) +static void notrace walk_stackframe(struct task_struct *task, + struct pt_regs *regs, bool (*fn)(void *, unsigned long), void *cookie) { struct unwind_frame_info info; unwind_frame_init_task(&info, task, NULL); - - /* unwind stack and save entries in stack_trace struct */ - trace->nr_entries = 0; - while (trace->nr_entries < trace->max_entries) { + while (1) { if (unwind_once(&info) < 0 || info.ip == 0) break; if (__kernel_text_address(info.ip)) - trace->entries[trace->nr_entries++] = info.ip; + if (!fn(cookie, info.ip)) + break; } } -/* - * Save stack-backtrace addresses into a stack_trace buffer. - */ -void save_stack_trace(struct stack_trace *trace) +void arch_stack_walk(stack_trace_consume_fn consume_entry, void *cookie, + struct task_struct *task, struct pt_regs *regs) { - dump_trace(current, trace); + walk_stackframe(task, regs, consume_entry, cookie); } -EXPORT_SYMBOL_GPL(save_stack_trace); -void save_stack_trace_tsk(struct task_struct *tsk, struct stack_trace *trace) +int arch_stack_walk_reliable(stack_trace_consume_fn consume_entry, void *cookie, + struct task_struct *task) { - dump_trace(tsk, trace); + walk_stackframe(task, NULL, consume_entry, cookie); + return 1; } -EXPORT_SYMBOL_GPL(save_stack_trace_tsk); |