Tribblix: manual page: Paddr_to

PADDR_TO_LOADOBJ(3PROC) Process Control Library Functions

NAME

Paddr_to_loadobj, Plmid_to_loadobj, Pname_to_loadobj - lookup loaded
object information

LIBRARY

Process Control Library (libproc, -lproc)

SYNOPSIS

#include <libproc.h>

const rd_loadobj_t *
Paddr_to_loadobj(struct ps_prochandle *P, uintptr_t addr);

const rd_loadobj_t *
Plmid_to_loadobj(struct ps_prochandle *P, Lmid_t lmid,
const char *name);

const rd_loadobj_t *
Pname_to_loadobj(struct ps_prochandle *P, const char *name);

DESCRIPTION

The Paddr_to_loadobj(), Plmid_to_loadobj(), and Pname_to_loadobj()
functions lookup loaded object information from the process handle P.
This information is provided by the run-time link-editor, ld.so.1(1),
and provides information about the loaded object such as the link-map
identifier, the TLS module ID, and the address of various sections.

The pointer to the data returned by the library will only be valid for
as long as the handle P is valid. Any calls to Prelease(3PROC) will
invalidate the data.

The Paddr_to_loadobj() function attempts to find the loaded object
information, if any, that exists for the address addr. Not all address
correspond to memory regions that were loaded by the run-time link-
editor. For example, if a user creates a region of anonymous memory
through the mmap(2) function, then it will not have any corresponding
loaded module.

The Pname_to_loadobj() function looks up the object named name and
returns the corresponding loaded object information. Two special
values may be used for name. The macro PR_OBJ_EXEC refers to the
executable object itself and the macro PR_OBJ_LDSO refers to the object
ld.so.1.

The Plmid_to_loadobj() function is similar to Pname_to_loadobj(). It
allows the use of a link-map identifier, lmid, which constricts the
search of the object named with name to that link-map. The special
value of PR_LMID_EVERY may be passed to indicate that every link-map
should be searched, which is equivalent in behavior to the
Pname_to_loadobj() function.

RETURN VALUES

Upon successful completion, the Paddr_to_loadobj(), Plmid_to_loadobj(),
and Pname_to_loadobj() functions return a pointer to the corresponding
loadable object information. Otherwise, if none exists then NULL is
returned.

INTERFACE STABILITY