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/*
* Copyright (c) 2014-2016, 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_MAPPED_SECTION_H
#define PT_MAPPED_SECTION_H
#include "intel-pt.h"
#include <stdint.h>
struct pt_section;
/* A section mapped into memory. */
struct pt_mapped_section {
/* The section that is mapped. */
struct pt_section *section;
/* The address space into which the section is mapped. */
struct pt_asid asid;
/* The virtual address at which the section is mapped. */
uint64_t vaddr;
};
/* Initialize a mapped section - @section may be NULL. */
extern void pt_msec_init(struct pt_mapped_section *msec,
struct pt_section *section, const struct pt_asid *asid,
uint64_t vaddr);
/* Destroy a mapped section - does not free @msec->section. */
extern void pt_msec_fini(struct pt_mapped_section *msec);
/* Return the virtual address of the beginning of the memory region. */
extern uint64_t pt_msec_begin(const struct pt_mapped_section *msec);
/* Return the virtual address one byte past the end of the memory region. */
extern uint64_t pt_msec_end(const struct pt_mapped_section *msec);
/* Return an identifier for the address-space the section is mapped into. */
extern const struct pt_asid *pt_msec_asid(const struct pt_mapped_section *msec);
/* Check if a section matches an asid.
*
* Returns a positive number if @msec matches @asid.
* Returns zero if @msec does not match @asid.
* Returns a negative error code otherwise.
*
* Returns -pte_internal if @msec or @asid are NULL.
*/
extern int pt_msec_matches_asid(const struct pt_mapped_section *msec,
const struct pt_asid *asid);
/* Read memory from a mapped section.
*
* Reads at most @size bytes from @msec at @addr in @asid into @buffer.
*
* Returns the number of bytes read on success, a negative error code otherwise.
* Returns -pte_internal, if @msec or @asid are NULL.
* Returns -pte_invalid, if @buffer is NULL.
* Returns -pte_nomap, if the mapped section does not contain @addr in @asid.
*/
extern int pt_msec_read(const struct pt_mapped_section *msec, uint8_t *buffer,
uint16_t size, const struct pt_asid *asid,
uint64_t addr);
/* Read memory from a mapped section.
*
* This function is similar to the above but requires the caller to map @msec.
*
* Returns the number of bytes read on success, a negative error code otherwise.
* Returns -pte_internal, if @msec or @asid are NULL.
* Returns -pte_invalid, if @buffer is NULL.
* Returns -pte_nomap, if the mapped section does not contain @addr in @asid.
*/
extern int pt_msec_read_mapped(const struct pt_mapped_section *msec,
uint8_t *buffer, uint16_t size,
const struct pt_asid *asid, uint64_t addr);
#endif /* PT_MAPPED_SECTION_H */
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