dwarf_get_arange(3) [freebsd man page]

DWARF_GET_ARANGE(3)					   BSD Library Functions Manual 				       DWARF_GET_ARANGE(3)

NAME

     dwarf_get_arange -- retrieve the address range descriptor for an address

LIBRARY

     DWARF Access Library (libdwarf, -ldwarf)

SYNOPSIS

     #include <libdwarf.h>

     int
     dwarf_get_arange(Dwarf_Arange *ar_list, Dwarf_Unsigned ar_cnt, Dwarf_Addr addr, Dwarf_Arange *ret_ar, Dwarf_Error *err);

DESCRIPTION

     Function dwarf_get_arange() searches an array of Dwarf_Arange descriptors for one that covers a given address.

     Argument ar_list should point to an array of Dwarf_Arange descriptors.

     Argument ar_cnt specifies the number of Dwarf_Arange descriptors in the array pointed to by argument ar_list.

     Argument addr specifies the address being looked up.

     Argument ret_ar will be used to store the Dwarf_Arange descriptor that covers the given address.

     If argument err is not NULL, it will be used to store error information in case of an error.

RETURN VALUES

     Function dwarf_get_arange() returns DW_DLV_OK when it succeeds.  It returns DW_DLV_NO_ENTRY if there is no Dwarf_Arange descriptor that cov-
     ers the provided address.	In case of an error, it returns DW_DLV_ERROR and sets the argument err.

ERRORS

     Function dwarf_get_arange() can fail with:

     [DW_DLE_ARGUMENT]	One of the arguments dbg, ar_list or ret_ar was NULL.

     [DW_DLE_ARGUMENT]	Value of argument ar_cnt equals to 0.

     [DW_DLE_NO_ENTRY]	A Dwarf_Arange descriptor that covers the given address was not found.

SEE ALSO

     dwarf(3), dwarf_get_aranges(3), dwarf_get_arange_cu_header_offset(3), dwarf_get_arange_info(3), dwarf_get_cu_die_offset(3)

BSD
								  April 16, 2011							       BSD

DWARF_GET_ARANGE_INFO(3)				   BSD Library Functions Manual 				  DWARF_GET_ARANGE_INFO(3)

NAME

     dwarf_get_arange_info -- extract address range information from a descriptor

LIBRARY

     DWARF Access Library (libdwarf, -ldwarf)

SYNOPSIS

     #include <libdwarf.h>

     int
     dwarf_get_arange_info(Dwarf_Arange ar, Dwarf_Addr *start, Dwarf_Unsigned *length, Dwarf_Off *cu_die_offset, Dwarf_Error *err);

DESCRIPTION

     Function dwarf_get_arange_info() extracts address range information from a Dwarf_Arange descriptor.

     Argument ar should reference a valid Dwarf_Arange descriptor returned by function dwarf_get_aranges(3).

     Argument start should point to a location which will hold the start value of the address range associated with the descriptor.

     Argument length should point to a location which will hold the length in bytes of the address range associated with the descriptor.

     Argument cu_die_offset should point to a location which will be set to an offset, relative to the ``.debug_info'' section, of the first
     debugging information entry in the compilation unit associated with argument ar.

     If argument err is not NULL, it will be used to store error information in case of an error.

RETURN VALUES

     Function dwarf_get_arange_info() returns DW_DLV_OK when it succeeds.  In case of an error, it returns DW_DLV_ERROR and sets the argument err.

ERRORS

     Function dwarf_get_arange_info() can fail with:

     [DW_DLE_ARGUMENT]	One of the arguments ar, start, length or cu_die_offset was NULL.

EXAMPLE

     To loop through all the address lookup table entries, use:

	   Dwarf_Debug dbg;
	   Dwarf_Addr start;
	   Dwarf_Arange *aranges;
	   Dwarf_Off die_off;
	   Dwarf_Signed i, cnt;
	   Dwarf_Unsigned length;
	   Dwarf_Error de;

	   if (dwarf_get_aranges(dbg, &aranges, &cnt, &de) != DW_DLV_OK)
		   errx(EXIT_FAILURE, "dwarf_get_aranges: %s",
		       dwarf_errmsg(de));
	   for (i = 0; i < cnt; i++) {
		   if (dwarf_get_arange_info(aranges[i], &start, &length,
		       &die_off, &de) != DW_DLV_OK) {
			   warnx("dwarf_get_arange_info: %s",
			       dwarf_errmsg(de));
			   continue;
		   }
		   /* Do something with the returned information. */
	   }

SEE ALSO

     dwarf(3), dwarf_get_arange(3), dwarf_get_aranges(3), dwarf_get_arange_cu_header_offset(3), dwarf_get_cu_die_offset(3)

BSD
								  April 16, 2011							       BSD