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/* SPDX-License-Identifier: BSD-2-Clause */
/**
* @file
*
* @ingroup rtems_rtl
*
* @brief RTEMS Run-Time Linker Unwind DWARF Support.
*/
/*
* COPYRIGHT (c) 2016, 2018 Chris Johns <chrisj@rtems.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#if !defined (_RTEMS_RTL_UNWIND_DW2_H_)
#define _RTEMS_RTL_UNWIND_DW2_H_
#include "rtl-elf.h"
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
#if __SIZEOF_LONG__ >= __SIZEOF_POINTER__
typedef long rtems_rtl_elf_unwind_dw2_sleb128;
typedef unsigned long rtems_rtl_elf_unwind_dw2_uleb128;
#elif __SIZEOF_LONG_LONG__ >= __SIZEOF_POINTER__
typedef long long rtems_rtl_elf_unwind_dw2_sleb128;
typedef unsigned long long rtems_rtl_elf_unwind_dw2_uleb128;
#else
#error No DW2 type available.
#endif
/**
* Architecture specific handler to check if a section contains exception
* handler data..
*
* @param obj The object file.
* @param name The section's name.
* @param uint32 flags The object file's flags.
* @retval true The section contains unwind information.
* @retval false The section does not contain unwind information.
*/
bool rtems_rtl_elf_unwind_dw2_parse (const rtems_rtl_obj* obj,
const char* name,
uint32_t flags);
/**
* Architecture specific handler to add an object file's unwind information to
* the base image.
*
* @param obj The object file.
* @retval true The unwind information has been registered.
* @retval false The unwind information could not be registered.
*/
bool rtems_rtl_elf_unwind_dw2_register (const rtems_rtl_obj* obj);
/**
* Architecture specific handler to remove an object file's unwind information
* from the base image.
*
* @param obj The object file.
* @retval true The unwind information has been deregistered.
* @retval false The unwind information could not be deregistered.
*/
bool rtems_rtl_elf_unwind_dw2_deregister (const rtems_rtl_obj* obj);
/**
* Read signed and unsigned LEB128 values.
*/
const uint8_t* rtems_rtl_elf_unwind_dw2_read_uleb128 (const uint8_t* data,
rtems_rtl_elf_unwind_dw2_uleb128* val);
const uint8_t* rtems_rtl_elf_unwind_dw2_read_sleb128 (const uint8_t* data,
rtems_rtl_elf_unwind_dw2_sleb128* val);
bool rtems_rtl_elf_unwind_dw2_relocate (const Elf_Addr* where, Elf_Word value, Elf_Word mask);
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif
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