Contributors: 6
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Miroslav Benes |
85 |
40.87% |
1 |
9.09% |
| Vasily Gorbik |
53 |
25.48% |
2 |
18.18% |
| Martin Schwidefsky |
37 |
17.79% |
1 |
9.09% |
| Heiko Carstens |
26 |
12.50% |
5 |
45.45% |
| Pratyush Anand |
6 |
2.88% |
1 |
9.09% |
| Greg Kroah-Hartman |
1 |
0.48% |
1 |
9.09% |
| Total |
208 |
|
11 |
|
// SPDX-License-Identifier: GPL-2.0
/*
* Stack trace management functions
*
* Copyright IBM Corp. 2006
*/
#include <linux/stacktrace.h>
#include <asm/stacktrace.h>
#include <asm/unwind.h>
#include <asm/kprobes.h>
void arch_stack_walk(stack_trace_consume_fn consume_entry, void *cookie,
struct task_struct *task, struct pt_regs *regs)
{
struct unwind_state state;
unsigned long addr;
unwind_for_each_frame(&state, task, regs, 0) {
addr = unwind_get_return_address(&state);
if (!addr || !consume_entry(cookie, addr))
break;
}
}
int arch_stack_walk_reliable(stack_trace_consume_fn consume_entry,
void *cookie, struct task_struct *task)
{
struct unwind_state state;
unsigned long addr;
unwind_for_each_frame(&state, task, NULL, 0) {
if (state.stack_info.type != STACK_TYPE_TASK)
return -EINVAL;
if (state.regs)
return -EINVAL;
addr = unwind_get_return_address(&state);
if (!addr)
return -EINVAL;
#ifdef CONFIG_RETHOOK
/*
* Mark stacktraces with krethook functions on them
* as unreliable.
*/
if (state.ip == (unsigned long)arch_rethook_trampoline)
return -EINVAL;
#endif
if (!consume_entry(cookie, addr))
return -EINVAL;
}
/* Check for stack corruption */
if (unwind_error(&state))
return -EINVAL;
return 0;
}