4 * Copyright 2008 Christoph Hellwig, IBM Corp.
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version
10 * 2 of the License, or (at your option) any later version.
13 #include <linux/sched.h>
14 #include <linux/stacktrace.h>
15 #include <asm/ptrace.h>
18 * Save stack-backtrace addresses into a stack_trace buffer.
20 void save_stack_trace(struct stack_trace
*trace
)
24 asm("mr %0,1" : "=r" (sp
));
27 unsigned long *stack
= (unsigned long *) sp
;
28 unsigned long newsp
, ip
;
30 if (!validate_sp(sp
, current
, STACK_FRAME_OVERHEAD
))
34 ip
= stack
[STACK_FRAME_LR_SAVE
];
37 trace
->entries
[trace
->nr_entries
++] = ip
;
41 if (trace
->nr_entries
>= trace
->max_entries
)
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