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sh: Use the new stack unwinder API

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Instead of implementing our own stack unwinder via dump_trace() we
should use the new stack unwinder API because it is more modular. This
change allows us to decouple the interface for generating stacktraces
from the implementation of a stack unwinder.

Signed-off-by: Matt Fleming <matt@console-pimps.org>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Matt Fleming
2009-08-11 22:43:20 +01:00
committed by Paul Mundt
parent bf61ad1f87
commit 0eff9f66de
3 changed files with 12 additions and 15 deletions
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17
arch/sh/kernel/dumpstack.c
View File

@@ -6,7 +6,7 @@
#include <linux/kallsyms.h>
#include <linux/ftrace.h>
#include <linux/debug_locks.h>
#include <asm/unwinder.h>
#include <asm/stacktrace.h>
void printk_address(unsigned long address, int reliable)
@@ -46,13 +46,10 @@ print_ftrace_graph_addr(unsigned long addr, void *data,
{ }
#endif
/*
* Unwind the call stack and pass information to the stacktrace_ops
* functions.
*/
void dump_trace(struct task_struct *task, struct pt_regs *regs,
unsigned long *sp, const struct stacktrace_ops *ops,
void *data)
void
stack_reader_dump(struct task_struct *task, struct pt_regs *regs,
unsigned long *sp, const struct stacktrace_ops *ops,
void *data)
{
struct thread_info *context;
int graph = 0;
@@ -71,8 +68,6 @@ void dump_trace(struct task_struct *task, struct pt_regs *regs,
}
}
}
EXPORT_SYMBOL(dump_trace);
static void
print_trace_warning_symbol(void *data, char *msg, unsigned long symbol)
@@ -117,7 +112,7 @@ void show_trace(struct task_struct *tsk, unsigned long *sp,
printk("\nCall trace:\n");
dump_trace(tsk, regs, sp, &print_trace_ops, "");
unwind_stack(tsk, regs, sp, &print_trace_ops, "");
printk("\n");

5
arch/sh/kernel/stacktrace.c
View File

@@ -13,6 +13,7 @@
#include <linux/stacktrace.h>
#include <linux/thread_info.h>
#include <linux/module.h>
#include <asm/unwinder.h>
#include <asm/ptrace.h>
#include <asm/stacktrace.h>
@@ -57,7 +58,7 @@ void save_stack_trace(struct stack_trace *trace)
{
unsigned long *sp = (unsigned long *)current_stack_pointer;
dump_trace(current, NULL, sp, &save_stack_ops, trace);
unwind_stack(current, NULL, sp, &save_stack_ops, trace);
}
EXPORT_SYMBOL_GPL(save_stack_trace);
@@ -89,6 +90,6 @@ void save_stack_trace_tsk(struct task_struct *tsk, struct stack_trace *trace)
{
unsigned long *sp = (unsigned long *)tsk->thread.sp;
dump_trace(current, NULL, sp, &save_stack_ops_nosched, trace);
unwind_stack(current, NULL, sp, &save_stack_ops_nosched, trace);
}
EXPORT_SYMBOL_GPL(save_stack_trace_tsk);