% PT_IMAGE_ADD_FILE(3)

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# NAME

pt_image_add_file, pt_image_copy - add file sections to a traced memory image
descriptor


# SYNOPSIS

| **\#include `<intel-pt.h>`**
|
| **int pt_image_add_file(struct pt_image \**image*, const char \**filename*,**
|                       **uint64_t *offset*, uint64_t *size*,**
|				        **const struct pt_asid \**asid*, uint64_t *vaddr*);**
| **int pt_image_copy(struct pt_image \**image*,**
|                   **const struct pt_image \**src*);**

Link with *-lipt*.


# DESCRIPTION

**pt_image_add_file**() adds a new section to a *pt_image* object.  The *image*
argument points to the *pt_image* object to which the new section is added.  The
*filename* argument gives the absolute or relative path to the file on disk that
contains the section.  The *offset* and *size* arguments define the section
within the file.  The *size* argument is silently truncated to end the section
with the end of the underlying file.  The *vaddr* argument gives the virtual
address at which the section is being loaded.

The *asid* argument gives an optional address space identifier.  If it is not
NULL, it points to a *pt_asid* structure, which is declared as:

~~~{.c}
/** An Intel PT address space identifier.
 *
 * This identifies a particular address space when adding file
 * sections or when reading memory.
 */
struct pt_asid {
	/** The size of this object - set to sizeof(struct pt_asid).
	 */
	size_t size;

	/** The CR3 value. */
	uint64_t cr3;

	/** The VMCS Base address. */
	uint64_t vmcs;
};
~~~

The *asid* argument can be used to prepare a collection of process, guest, and
hypervisor images to an Intel(R) Processor Trace (Intel PT) instruction flow
decoder.  The decoder will select the current image based on CR3 and VMCS
information in the Intel PT trace.

If only the CR3 or only the VMCS field should be considered by the decoder,
supply *pt_asid_no_cr3* and *pt_asid_no_vmcs* to the other field respectively.

If the *asid* argument is NULL, the file section will be added for all
processes, guests, and hypervisor images.

**pt_image_copy**() adds file sections from the *pt_image* pointed to by the
*src* argument to the *pt_image* pointed to by the *dst* argument.  Sections in
*src* that would overlap with sections in *dst* are ignored.


# RETURN VALUE

**pt_image_add_file**() returns zero on success or a negative *pt_error_code*
enumeration constant in case of an error.

**pt_image_copy**() returns the number of ignored sections on success or a
negative *pt_error_code* enumeration constant in case of an error.


# ERRORS

pte_invalid
:   The *image* or *filename* argument is NULL or the *offset* argument is too
    big such that the section would start past the end of the file
    (**pt_image_add_file**()).
    The *src* or *dst* argument is NULL (**pt_image_copy**()).

pte_bad_image
:   The image section would overlap with some other section already contained in
    *image*.


# SEE ALSO

**pt_image_alloc**(3), **pt_image_free**(3),
**pt_image_remove_by_filename**(3), **pt_image_remove_by_asid**(3),
**pt_image_set_callback**(3), **pt_insn_set_image**(3), **pt_insn_get_image**(3)
