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dwarf_srclang(3) [freebsd man page]

DWARF_HIGHPC(3) 					   BSD Library Functions Manual 					   DWARF_HIGHPC(3)

NAME
dwarf_arrayorder, dwarf_bitoffset, dwarf_bitsize, dwarf_bytesize, dwarf_highpc, dwarf_highpc_b, dwarf_lowpc, dwarf_srclang -- retrieve the value of a DWARF attribute LIBRARY
DWARF Access Library (libdwarf, -ldwarf) SYNOPSIS
#include <libdwarf.h> int dwarf_arrayorder(Dwarf_Die die, Dwarf_Unsigned *ret_order, Dwarf_Error *err); int dwarf_bitoffset(Dwarf_Die die, Dwarf_Unsigned *ret_size, Dwarf_Error *err); int dwarf_bitsize(Dwarf_Die die, Dwarf_Unsigned *ret_size, Dwarf_Error *err); int dwarf_bytesize(Dwarf_Die die, Dwarf_Unsigned *ret_size, Dwarf_Error *err); int dwarf_highpc(Dwarf_Die die, Dwarf_Addr *ret_highpc, Dwarf_Error *err); int dwarf_highpc_b(Dwarf_Die die, Dwarf_Addr *ret_highpc, Dwarf_Half *ret_form, enum Dwarf_Form_Class *ret_class, Dwarf_Error *err); int dwarf_lowpc(Dwarf_Die die, Dwarf_Addr *ret_lowpc, Dwarf_Error *err); int dwarf_srclang(Dwarf_Die die, Dwarf_Unsigned *ret_lang, Dwarf_Error *err); DESCRIPTION
These convenience functions are used to retrieve DWARF attribute values associated with a Debugging Information Entry (DIE) descriptor denoted by argument die. These functions store the value of the requested attribute into the location pointed to by their second argument, provided that the requested attribute exists in the debugging information entry. The list of functions and the DWARF attribute that they retrieve are: dwarf_arrayorder() Retrieve the DW_AT_ordering attribute value. dwarf_bitoffset() Retrieve the DW_AT_bit_offset attribute value. dwarf_bitsize() Retrieve the DW_AT_bit_size attribute value. dwarf_bytesize() Retrieve the DW_AT_byte_size attribute value. dwarf_highpc() Retrieve the DW_AT_high_pc attribute value. dwarf_highpc_b() Retrieve the DW_AT_high_pc attribute value. dwarf_lowpc() Retrieve the DW_AT_low_pc attribute value. dwarf_srclang() Retrieve the DW_AT_language attribute value. Function dwarf_highpc_b() is an enhanced version of function dwarf_highpc(). It sets the location specified by argument ret_form to the form code of the attribute DW_AT_high_pc, and sets the location specified by argument ret_class to the class of that form. A value of NULL may be used for either of the arguments ret_form or ret_class if the caller is not interested in the respective value. RETURN VALUES
These functions return DW_DLV_OK on success. If the debugging information entry descriptor denoted by argument die does not contain the requested attribute, these functions return DW_DLV_NO_ENTRY and set argument err. For other errors, they return DW_DLV_ERROR and set argument err. ERRORS
These functions can fail with the following errors: [DW_DLE_ARGUMENT] Arguments die, ret_highpc, ret_lowpc, ret_size, ret_lang or ret_order were NULL. [DW_DLE_NO_ENTRY] Argument die had no requested attribute. SEE ALSO
dwarf(3), dwarf_attr(3), dwarf_attrlist(3), dwarf_hasattr(3), dwarf_get_form_class(3) BSD
July 22, 2014 BSD

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DWARF_ATTRVAL_SIGNED(3) 				   BSD Library Functions Manual 				   DWARF_ATTRVAL_SIGNED(3)

NAME
dwarf_attrval_flag, dwarf_attrval_signed, dwarf_attrval_string, dwarf_attrval_unsigned -- retrieve the value of an attribute within a DWARF debugging information entry LIBRARY
DWARF Access Library (libdwarf, -ldwarf) SYNOPSIS
#include <libdwarf.h> int dwarf_attrval_flag(Dwarf_Die die, Dwarf_Half attr, Dwarf_Bool *ret, Dwarf_Error *err); int dwarf_attrval_signed(Dwarf_Die die, Dwarf_Half attr, Dwarf_Signed *ret, Dwarf_Error *err); int dwarf_attrval_string(Dwarf_Die die, Dwarf_Half attr, const char **ret, Dwarf_Error *err); int dwarf_attrval_unsigned(Dwarf_Die die, Dwarf_Half attr, Dwarf_Unsigned *ret, Dwarf_Error *err); DESCRIPTION
These functions search the debugging information entry referenced by argument die for the attribute named by argument attr. If the named attribute is found, the functions set the location pointed to by argument ret to the value of the attribute. The argument err, if non NULL, will be used to return an error descriptor in case of an error. Function dwarf_attrval_flag() sets the location pointed to by argument ret to either 0 or 1. If the form of the attribute named by argument attr is DW_FORM_flag, function dwarf_attrval_flag() sets the location pointed to by argument ret to 1 if the attribute has a non-zero value, or to 0 otherwise. If the form of the attribute named by argument attr is DW_FORM_flag_present, function dwarf_attrval_flag() uncondition- ally sets the location pointed to by argument ret to 1. The form of the attribute must be one of DW_FORM_flag or DW_FORM_flag_present. Function dwarf_attrval_signed() stores the value for the attribute named by argument attr, into the location pointed to by argument ret. The attribute's value is treated as a signed integral quantity and is sign-extended as needed. The attribute named by the argument attr must belong to the CONSTANT class and must have one of the following forms: DW_FORM_data1, DW_FORM_data2, DW_FORM_data4, DW_FORM_data8 or DW_FORM_sdata. Function dwarf_attrval_string() sets the location pointed to by argument ret to a pointer to a NUL-terminated string that is the value of the attribute named by argument attr. The form of the attribute must be one of DW_FORM_string or DW_FORM_strp. Function dwarf_attrval_unsigned() stores the value for the attribute named by argument attr into the location pointed to by argument ret. The attribute's value is treated as an unsigned integral quantity, and is zero-extended as needed. The named attribute must belong to one of the CONSTANT, ADDRESS or REFERENCE classes and must have one of the following forms: DW_FORM_addr, DW_FORM_data1, DW_FORM_data2, DW_FORM_data4, DW_FORM_data8, DW_FORM_udata, DW_FORM_ref1, DW_FORM_ref2, DW_FORM_ref4, DW_FORM_ref8, or DW_FORM_ref_udata. If the attribute named by argument attr is not present in the debugging information entry referenced by argument die, and if a DW_AT_abstract_origin attribute is present in the debugging information entry, function dwarf_attrval_unsigned() will search for the named attribute in the debugging information entry referenced by the DW_AT_abstract_origin attribute. RETURN VALUES
On success, these functions returns DW_DLV_OK. If the named attribute was not found in the specified debugging information entry descriptor these functions return DW_DLV_NO_ENTRY and set argument err. For other errors, these functions return DW_DLV_ERROR and set argument err. COMPATIBILITY
These functions are extensions added by this implementation of the DWARF(3) API. ERRORS
These functions may fail with the following errors: [DW_DLE_ARGUMENT] Either of the arguments die or ret was NULL. [DW_DLE_NO_ENTRY] Argument die did not contain an attribute corresponding to the value in argument attr. [DW_DLE_ATTR_FORM_BAD] The attribute named by argument attr was not of a permitted form. SEE ALSO
dwarf(3), dwarf_attr(3), dwarf_hasattr(3) BSD
January 18, 2014 BSD
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