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61 lines
1.3 KiB
61 lines
1.3 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* Stack trace management functions |
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* |
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* Copyright IBM Corp. 2006 |
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* Author(s): Heiko Carstens <[email protected]> |
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*/ |
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#include <linux/stacktrace.h> |
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#include <asm/stacktrace.h> |
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#include <asm/unwind.h> |
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#include <asm/kprobes.h> |
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void arch_stack_walk(stack_trace_consume_fn consume_entry, void *cookie, |
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struct task_struct *task, struct pt_regs *regs) |
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{ |
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struct unwind_state state; |
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unsigned long addr; |
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unwind_for_each_frame(&state, task, regs, 0) { |
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addr = unwind_get_return_address(&state); |
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if (!addr || !consume_entry(cookie, addr)) |
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break; |
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} |
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} |
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int arch_stack_walk_reliable(stack_trace_consume_fn consume_entry, |
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void *cookie, struct task_struct *task) |
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{ |
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struct unwind_state state; |
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unsigned long addr; |
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unwind_for_each_frame(&state, task, NULL, 0) { |
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if (state.stack_info.type != STACK_TYPE_TASK) |
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return -EINVAL; |
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if (state.regs) |
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return -EINVAL; |
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addr = unwind_get_return_address(&state); |
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if (!addr) |
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return -EINVAL; |
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#ifdef CONFIG_KPROBES |
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/* |
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* Mark stacktraces with kretprobed functions on them |
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* as unreliable. |
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*/ |
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if (state.ip == (unsigned long)kretprobe_trampoline) |
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return -EINVAL; |
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#endif |
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if (!consume_entry(cookie, addr)) |
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return -EINVAL; |
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} |
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/* Check for stack corruption */ |
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if (unwind_error(&state)) |
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return -EINVAL; |
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return 0; |
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}
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