48 lines
1.5 KiB
C++
48 lines
1.5 KiB
C++
/** Provides stack walking facilities exploiting the eh_elf objects, that can
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* be loaded at runtime. */
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#pragma once
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#include <cstdint>
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#include <functional>
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#include "../shared/context_struct.h"
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/** Handled registers list */
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enum StackWalkerRegisters {
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SW_REG_RIP,
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SW_REG_RSP,
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SW_REG_RBP
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};
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/** Initialize the stack walker. This must be called only once.
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*
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* \return true iff everything was correctly initialized.
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*/
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bool stack_walker_init();
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/** Deallocate everything that was allocated by the stack walker */
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void stack_walker_close();
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/** Get the unwind context of the point from which this function was called.
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*
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* This context must then be exploited straight away: it is unsafe to alter the
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* call stack before using it, in particular by returning from the calling
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* function. */
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unwind_context_t get_context();
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/** Unwind the passed context once, in place.
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*
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* Returns `true` if the context was actually unwinded, or `false` if the end
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* of the call stack was reached. */
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bool unwind_context(unwind_context_t& ctx);
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/** Call the passed function once per frame in the call stack, most recent
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* frame first, with the current context as its sole argument. */
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void walk_stack(const std::function<void(const unwind_context_t&)>& mapped);
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/** Get a register's value on an unwind_context_t. This is useful for other
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* implementations of stack_walker that use different unwind_context_t */
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uintptr_t get_register(const unwind_context_t& ctx, StackWalkerRegisters reg);
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