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DWARF_GET_ARANGE_INFO(3)   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.

EXAMPLES
     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. */
           }

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.

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

NetBSD 10.99                    April 16, 2011                    NetBSD 10.99