dwarf_get_arange_info(3) [freebsd man page]

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

DWARF_GET_FDE_RANGE(3)					   BSD Library Functions Manual 				    DWARF_GET_FDE_RANGE(3)

NAME

     dwarf_get_fde_range -- retrieve range information from an FDE descriptor

LIBRARY

     DWARF Access Library (libdwarf, -ldwarf)

SYNOPSIS

     #include <libdwarf.h>

     int
     dwarf_get_fde_range(Dwarf_Fde fde, Dwarf_Addr *low_pc, Dwarf_Unsigned *func_len, Dwarf_Ptr *fde_bytes, Dwarf_Unsigned *fde_byte_len,
	 Dwarf_Off *cie_offset, Dwarf_Signed *cie_index, Dwarf_Off *fde_offset, Dwarf_Error *err);

DESCRIPTION

     Function dwarf_get_fde_range() retrieves range and offset information from a given FDE descriptor.

     Argument fde should reference a valid DWARF FDE descriptor.

     Argument low_pc should point to a location that will be set to the lowest program counter address covered by the FDE descriptor.

     Argument func_len should point to a location that will hold the length in bytes of the address range covered by the FDE descriptor.

     Argument fde_bytes should point to a location that will be set to a pointer to the content of the FDE descriptor itself.

     Argument fde_byte_len should point to a location that will hold the length in bytes of the FDE descriptor itself.

     Argument cie_offset should point to a location that will be set to the offset, relative to the DWARF ``.debug_frame'' section, of the CIE
     descriptor associated with the given FDE descriptor.

     Argument cie_index should point to a location that will hold the index of the CIE descriptor associated with the FDE descriptor.  The
     returned value is a zero-based index into the array of CIE descriptors returned by a prior call to functions dwarf_get_fde_list(3) or
     dwarf_get_fde_list_eh(3).

     Argument fde_offset should point to a location that will be set to the offset, relative to the DWARF ``.debug_frame'' section, of the FDE
     descriptor.

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

RETURN VALUES

     Function dwarf_get_fde_range() 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_fde_range() can fail with:

     [DW_DLE_ARGUMENT]	One of the arguments fde, low_pc, func_len, fde_bytes, fde_byte_len, cie_offset, cie_index or fde_offset was NULL.

SEE ALSO

     dwarf(3), dwarf_get_cie_info(3), dwarf_get_cie_index(3), dwarf_get_cie_of_fde, dwarf_get_fde_at_pc(3), dwarf_get_fde_info_for_all_regs(3),
     dwarf_get_fde_info_for_all_regs3(3), dwarf_get_fde_info_for_cfa_reg3(3), dwarf_get_fde_info_for_reg(3), dwarf_get_fde_info_for_reg3(3),
     dwarf_get_fde_instr_bytes(3), dwarf_get_fde_list(3), dwarf_get_fde_list_eh(3), dwarf_get_fde_n(3)

BSD
								   May 22, 2011 							       BSD