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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 de-
     scriptor

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 in-
     formation 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

NAME | LIBRARY | SYNOPSIS | DESCRIPTION | RETURN VALUES | ERRORS | EXAMPLE | SEE ALSO

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