mirror of
https://github.com/FEX-Emu/linux.git
synced 2024-12-21 00:42:16 +00:00
8b95d9172b
Fixes this type of problem: CC arch/s390/kernel/stacktrace.o arch/s390/kernel/stacktrace.c:84: warning: data definition has no type or storage class arch/s390/kernel/stacktrace.c:84: warning: type defaults to 'int' in declaration of 'EXPORT_SYMBOL_GPL' arch/s390/kernel/stacktrace.c:84: warning: parameter names (without types) in function declaration arch/s390/kernel/stacktrace.c:97: warning: data definition has no type or storage class arch/s390/kernel/stacktrace.c:97: warning: type defaults to 'int' in declaration of 'EXPORT_SYMBOL_GPL' arch/s390/kernel/stacktrace.c:97: warning: parameter names (without types) in function declaration caused by "stacktrace: export save_stack_trace[_tsk]" Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Stephen Rothwell <sfr@canb.auug.org.au> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
56 lines
1.2 KiB
C
56 lines
1.2 KiB
C
/*
|
|
* Stack trace management functions
|
|
*
|
|
* Copyright (C) 2007 Atmel Corporation
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*/
|
|
#include <linux/sched.h>
|
|
#include <linux/stacktrace.h>
|
|
#include <linux/thread_info.h>
|
|
#include <linux/module.h>
|
|
|
|
register unsigned long current_frame_pointer asm("r7");
|
|
|
|
struct stackframe {
|
|
unsigned long lr;
|
|
unsigned long fp;
|
|
};
|
|
|
|
/*
|
|
* Save stack-backtrace addresses into a stack_trace buffer.
|
|
*/
|
|
void save_stack_trace(struct stack_trace *trace)
|
|
{
|
|
unsigned long low, high;
|
|
unsigned long fp;
|
|
struct stackframe *frame;
|
|
int skip = trace->skip;
|
|
|
|
low = (unsigned long)task_stack_page(current);
|
|
high = low + THREAD_SIZE;
|
|
fp = current_frame_pointer;
|
|
|
|
while (fp >= low && fp <= (high - 8)) {
|
|
frame = (struct stackframe *)fp;
|
|
|
|
if (skip) {
|
|
skip--;
|
|
} else {
|
|
trace->entries[trace->nr_entries++] = frame->lr;
|
|
if (trace->nr_entries >= trace->max_entries)
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* The next frame must be at a higher address than the
|
|
* current frame.
|
|
*/
|
|
low = fp + 8;
|
|
fp = frame->fp;
|
|
}
|
|
}
|
|
EXPORT_SYMBOL_GPL(save_stack_trace);
|