| PLOOKUP_BY_ADDR(3PROC) | Process Control Library Functions | PLOOKUP_BY_ADDR(3PROC) |
Plookup_by_addr,
Pxlookup_by_addr,
Pxlookup_by_addr_resolved,
Plookup_by_name,
Pxlookup_by_name — lookup
symbols in a process
Process Control Library (libproc, -lproc)
#include
<libproc.h>
int
Plookup_by_addr(struct ps_prochandle
*P, uintptr_t addr, char
*buf, size_t size, Gelf_Sym
*symp);
int
Pxlookup_by_addr(struct ps_prochandle
*P, uintptr_t addr, char
*buf, size_t size, Gelf_Sym
*symp, prsyminfo_t *sip);
int
Pxlookup_by_addr_resolved(struct
ps_prochandle *P, uintptr_t addr,
char *buf, size_t size,
Gelf_Sym *symp, prsyminfo_t
*sip);
int
Plookup_by_name(struct ps_prochandle
*P, const char *object, const
char *symbol, GElf_Sym *symp);
int
Pxlookup_by_name(struct ps_prochandle
*P, Lmid_t lmid, const char
*object, const char *symbol,
GElf_Sym *symp, prsyminfo_t
*sip);
The
Plookup_by_addr(),
Pxlookup_by_addr(),
Pxlookup_by_addr_resolved(),
Plookup_by_name(), and
Pxlookup_by_name() functions look up symbol
information in the process handle P and fill in the
ELF symbol information in symp with the found symbol.
Symbols may be looked up both by address and name.
The
Plookup_by_addr()
function looks up symbol information corresponding to the address
addr. If found, up to size bytes
of the symbol's name, including the null terminator will be filled in to the
buffer buf.
The
Pxlookup_by_addr()
function is identical to the Plookup_by_addr()
function, except that it also fills in the structure
sip with additional information. The definition of the
prsyminfo_t is found in
libproc(3LIB).
The
Pxlookup_by_addr_resolved()
function is similar to the Pxlookup_by_addr()
function; however, it attempts to resolve the paths present in the
prsyminfo_t to an absolute path on the file system.
The
Plookup_by_name()
function attempts to look up a symbol based on its name. The
object argument allows the caller to specify a
specific object that was mapped in by the run-time link-editor to search for
symbol in. The system provides three special values
which may be passed in for object. The value
PR_OBJ_EXEC refers to the executable's object
(a.out). The value PR_OBJ_LDSO refers to the object
ld.so.1.
The value PR_OBJ_EVERY indicates that every object
should be searched.
The
Pxlookup_by_name()
function is similar to the Plookup_by_name()
function; however, it allows a link-map identifier,
lmid, to be specified and also provides additional
information about the symbol in the form of the
prsyminfo_t sip. The specification
of lmid restricts the search for the object named
object and symbol named symbol
to the specified link-map.
There are three special link-map
identifiers that may be passed in. The symbol
PR_LMID_EVERY indicates that every link-map should
be searched. The symbol LM_ID_BASE indicates that
the base link-map, the one that is used for the executable should be
searched. Finally, the symbol LM_ID_LDSO refers to
the link-map that is used by the run-time link editor, ld.so.1. The
Plookup_by_name()
function behaves like Pxlookup_by_name() when the
PR_LMID_EVERY argument is passed to
lmid, indicating that every link-map should be
searched.
Upon successful completion, the
Plookup_by_addr(),
Pxlookup_by_addr(),
Pxlookup_by_addr_resolved(),
Plookup_by_name(), and
Pxlookup_by_name() functions return
0 and fill in
the symbol information. Otherwise,
-1 is returned
to indicate that the symbol could not be found.
See LOCKING in libproc(3LIB).
| May 11, 2016 | OmniOS |