FreeBSD manual

download PDF document: dwarf_die_CU_offset.3.pdf

DWARF_DIEOFFSET(3) FreeBSD Library Functions Manual DWARF_DIEOFFSET(3) NAME dwarf_die_CU_offset, dwarf_die_CU_offset_range, dwarf_dieoffset, dwarf_get_cu_die_offset_given_cu_header_offset, dwarf_get_cu_die_offset_given_cu_header_offset_b - return offsets of DWARF debugging information entries LIBRARY DWARF Access Library (libdwarf, -ldwarf) SYNOPSIS #include <libdwarf.h> int dwarf_die_CU_offset(Dwarf_Die die, Dwarf_Off *ret_offset, Dwarf_Error *err); int dwarf_die_CU_offset_range(Dwarf_Die die, Dwarf_Off *cu_offset, Dwarf_Off *cu_length, Dwarf_Error *err); int dwarf_dieoffset(Dwarf_Die die, Dwarf_Off *ret_offset, Dwarf_Error *err); int dwarf_get_cu_die_offset_given_cu_header_offset(Dwarf_Debug dbg, Dwarf_Off in_cu_header_offset, Dwarf_Off *out_cu_die_offset, Dwarf_Error *err); int dwarf_get_cu_die_offset_given_cu_header_offset_b(Dwarf_Debug dbg, Dwarf_Off in_cu_header_offset, Dwarf_Bool is_info, Dwarf_Off *out_cu_die_offset, Dwarf_Error *err); DESCRIPTION These functions are used to retrieve offsets for DWARF debugging information entries. Function dwarf_die_CU_offset() returns the offset of the debugging information entry referenced by argument die relative to the start of its containing compilation unit. Argument ret_offset should point to the location that is to hold the returned offset. If argument err is non- NULL, it will be used to return an error descriptor in case of an error. Function dwarf_die_CU_offset_range() returns the section-relative offset and length of the compilation unit containing the debugging information entry referenced by argument die. Argument cu_offset should point to a location that will hold the returned offset. Argument cu_length should point to a location that will hold the returned length of the compilation unit. If argument err is non-NULL, it will be used to return an error descriptor in case of an error. Function dwarf_dieoffset() retrieves the section-relative offset of the debugging information entry referenced by argument die. Argument ret_offset should point to a location that is to hold the returned section-relative offset. If argument err is non-NULL, it will be used to return an error descriptor in case of an error. used to return an error descriptor in case of an error. Function dwarf_get_cu_die_offset_given_cu_header_offset_b() behaves identically to the function dwarf_get_cu_die_offset_given_cu_header_offset() when the argument is_info is non-zero. When the argument is_info is zero, function dwarf_get_cu_die_offset_given_cu_header_offset_b() returns the offset for the first debugging information entry for a type unit, given an offset to the header of the type unit in argument in_cu_header_offset. Argument out_cu_die_offset points to a location that will hold the returned offset. If the argument err is non-NULL, it will be used to return an error descriptor in case of an error. RETURN VALUES On success, these functions return DW_DLV_OK. In case of an error, these functions return DW_DLV_ERROR and set argument err. Function dwarf_get_cu_die_offset_given_cu_header_offset() and dwarf_get_cu_die_offset_given_cu_header_offset_b() returns DW_DLV_NO_ENTRY and sets argument err if there is no compilation or type unit located at the offset specified in argument in_cu_header_offset. ERRORS These functions may fail with the following errors: [DW_DLE_ARGUMENT] One of the arguments cu_length, cu_offset, dbg, die, out_cu_die_offset or ret_offset was NULL. [DW_DLE_NO_ENTRY] Argument in_cu_header_offset specified an unknown offset. SEE ALSO dwarf(3), dwarf_next_cu_header(3), dwarf_offdie(3), dwarf_offdie_b(3) FreeBSD 14.0-RELEASE-p11 December 21, 2014 FreeBSD 14.0-RELEASE-p11