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/*
* Copyright (c) 2015-2019, Intel Corporation
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* * 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.
* * Neither the name of Intel Corporation nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* 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.
*/
#ifndef PT_SECTION_POSIX_H
#define PT_SECTION_POSIX_H
#include <stdint.h>
#include <sys/stat.h>
struct pt_section;
/* Fstat-based file status. */
struct pt_sec_posix_status {
/* The file status. */
struct stat stat;
};
/* MMAP-based section mapping information. */
struct pt_sec_posix_mapping {
/* The mmap base address. */
uint8_t *base;
/* The mapped memory size. */
uint64_t size;
/* The begin and end of the mapped memory. */
const uint8_t *begin, *end;
};
/* Map a section.
*
* On success, sets @section's mapping, unmap, and read pointers.
*
* Returns zero on success, a negative error code otherwise.
* Returns -pte_internal if @section or @file are NULL.
* Returns -pte_invalid if @section can't be mapped.
*/
extern int pt_sec_posix_map(struct pt_section *section, int fd);
/* Unmap a section.
*
* On success, clears @section's mapping, unmap, and read pointers.
*
* Returns zero on success, a negative error code otherwise.
* Returns -pte_internal if @section is NULL.
* Returns -pte_internal if @section has not been mapped.
*/
extern int pt_sec_posix_unmap(struct pt_section *section);
/* Read memory from an mmaped section.
*
* Reads at most @size bytes from @section at @offset into @buffer.
*
* Returns the number of bytes read on success, a negative error code otherwise.
* Returns -pte_invalid if @section or @buffer are NULL.
* Returns -pte_nomap if @offset is beyond the end of the section.
*/
extern int pt_sec_posix_read(const struct pt_section *section, uint8_t *buffer,
uint16_t size, uint64_t offset);
/* Compute the memory size of a section.
*
* On success, provides the amount of memory used for mapping @section in bytes
* in @size.
*
* Returns zero on success, a negative error code otherwise.
* Returns -pte_internal if @section or @size is NULL.
* Returns -pte_internal if @section has not been mapped.
*/
extern int pt_sec_posix_memsize(const struct pt_section *section,
uint64_t *size);
#endif /* PT_SECTION_POSIX_H */
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