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77 lines
1.7 KiB
C
77 lines
1.7 KiB
C
// Copyright (c) Meta Platforms, Inc. and affiliates.
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// SPDX-License-Identifier: GPL-3.0-or-later
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/**
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* @file
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*
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* ORC unwinder support.
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*
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* See @ref DebugInfo.
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*/
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#ifndef DRGN_ORC_INFO_H
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#define DRGN_ORC_INFO_H
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#include <stdbool.h>
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#include <stddef.h>
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#include <stdint.h>
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#include "cfi.h"
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struct drgn_debug_info_module;
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/**
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* @ingroup DebugInfo
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*
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* @{
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*/
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/** ORC unwinder data for a @ref drgn_debug_info_module. */
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struct drgn_orc_module_info {
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/**
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* Base for calculating program counter corresponding to an ORC unwinder
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* entry.
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*
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* This is the address of the `.orc_unwind_ip` ELF section.
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*
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* @sa drgn_orc_module_info::entries
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*/
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uint64_t pc_base;
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/**
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* Offsets for calculating program counter corresponding to an ORC
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* unwinder entry.
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*
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* This is the contents of the `.orc_unwind_ip` ELF section, byte
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* swapped to the host's byte order if necessary.
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*
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* @sa drgn_orc_module_info::entries
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*/
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int32_t *pc_offsets;
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/**
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* ORC unwinder entries.
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*
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* This is the contents of the `.orc_unwind` ELF section, byte swapped
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* to the host's byte order if necessary.
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*
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* Entry `i` specifies how to unwind the stack if
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* `orc_pc(i) <= PC < orc_pc(i + 1)`, where
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* `orc_pc(i) = pc_base + 4 * i + pc_offsets[i]`.
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*/
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struct drgn_orc_entry *entries;
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/** Number of ORC unwinder entries. */
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size_t num_entries;
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};
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void drgn_orc_module_info_deinit(struct drgn_debug_info_module *module);
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struct drgn_error *
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drgn_debug_info_find_orc_cfi(struct drgn_debug_info_module *module,
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uint64_t unbiased_pc,
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struct drgn_cfi_row **row_ret,
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bool *interrupted_ret,
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drgn_register_number *ret_addr_regno_ret);
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/** @} */
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#endif /* DRGN_ORC_INFO_H */
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