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.Dd May 11, 2016 .Dt PADDR_TO_MAP 3PROC .Os .Sh NAME .Nm Paddr_to_map , .Nm Paddr_to_text_map , .Nm Plmid_to_map , .Nm Pname_to_map .Nd lookup memory map information .Sh SYNOPSIS .Lb libproc n libproc.h .Ft "const prmap_t *" .Fo Paddr_to_map .Fa "struct ps_prochandle *P" .Fa "uintptr_t addr" .Fc .Ft "const prmap_t *" .Fo Paddr_to_text_map .Fa "struct ps_prochandle *P" .Fa "uintptr_t addr" .Fc .Ft "const prmap_t *" .Fo Plmid_to_map .Fa "struct ps_prochandle *P" .Fa "Lmid_t lmid" .Fa "const char *name" .Fc .Ft "const prmap_t *" .Fo Pname_to_map .Fa "struct ps_prochandle *P" .Fa "const char *name" .Fc .Sh DESCRIPTION The .Fn Paddr_to_map , .Fn Paddr_to_text_map , .Fn Plmid_to_map , and .Fn Pname_to_map functions lookup memory map information in the process handle .Fa P . The .Sy prmap_t structure provides information such as the size, offset, and object of the mapping and is defined in .Xr proc 4 .

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

p The .Fn Paddr_to_map function attempts to find the mapping information corresponding to the address .Fa addr .

p The .Fn Paddr_to_text_map function is similar to the .Fn Paddr_to_map function; however, it only returns successfully if the specified address corresponds to a text mapping as identified by the run-time link-editor. One use of this is to ensure that a mapping is actually a text-mapping before inserting a breakpoint in it.

p The .Fn Pname_to_map function looks up the object named .Fa name and returns the corresponding mapping information. Two special values may be used for name. The macro .Dv PR_OBJ_EXEC refers to the executable object itself and the macro .Dv PR_OBJ_LDSO refers to the object ld.so.1 .

p The .Fn Plmid_to_map function is similar to .Fn Pname_to_map . It allows passing a link-map identifier, .Fa lmid , which constricts the search of the object named with .Fa name to that link-map. The special value of .Dv PR_LMID_EVERY may be passed to indicate that every link-map should be searched, which is equivalent in behavior to the .Fn Pname_to_map function. .Sh RETURN VALUES Upon successful completion, the .Fn Paddr_to_map , .Fn Paddr_to_text_map , .Fn Plmid_to_map , and .Fn Pname_to_map functions return a pointer to the corresponding mapping information. If none exists then .Dv NULL is returned. .Sh INTERFACE STABILITY .Sy Uncommitted .Sh MT-LEVEL See .Sy LOCKING in .Xr libproc 3LIB . .Sh SEE ALSO .Xr libproc 3LIB , .Xr Prelease 3PROC , .Xr proc 4