dwarf_add_arange
,
dwarf_add_arange_b
—
add address range information to a DWARF producer instance
DWARF Access Library (libdwarf, -ldwarf)
#include <libdwarf.h>
Dwarf_Unsigned
dwarf_add_arange
(Dwarf_P_Debug
dbg, Dwarf_Addr start,
Dwarf_Unsigned length, Dwarf_Signed
symbol_index, Dwarf_Error *err);
Dwarf_Unsigned
dwarf_add_arange_b
(Dwarf_P_Debug
dbg, Dwarf_Addr start,
Dwarf_Unsigned length, Dwarf_Unsigned
symbol_index, Dwarf_Unsigned end_symbol_index,
Dwarf_Addr offset_from_end_symbol,
Dwarf_Error *err);
Function dwarf_add_arange_b
() adds an address range
entry to a producer instance.
Argument dbg should reference a DWARF
producer instance allocated using
dwarf_producer_init(3)
or
dwarf_producer_init_b(3).
Argument start specifies the relocatable
start address of the address range.
Argument length specifies the length of the
address range.
Argument symbol_index specifies the ELF
symbol index of the first symbol to be used for relocation.
Argument end_symbol_index specifies the ELF
symbol index of the second symbol to be used for relocation.
- If argument end_symbol_index is not 0, the
DW_DLC_SYMBOLIC_RELOCATIONS
flag should have been
set on the DWARF producer instance. The address value specified by
argument start will be treated as an offset value
from the first symbol, and the argument
offset_from_end_symbol should hold an offset value
from the second symbol. Application code can retrieve the relocation
entries for the symbol pair by calling function
dwarf_get_relocation_info(3).
The relocation entry for the first symbol will have type
dwarf_drt_first_of_length_pair
and the relocation
entry for the second symbol will have type
dwarf_drt_second_of_length_pair
.
- If argument end_symbol_index is 0, argument
offset_from_end_symbol will be ignored and only one
symbol is used for relocation.
If argument err is not NULL, it will be used
to store error information in case of an error.
Function dwarf_add_arange
() is deprecated.
It is similar to function dwarf_add_arange_b
()
except that it cannot handle all possible symbol index values and supports
only one relocation symbol.
On success, these functions return a non-zero value. In case of an error, these
functions return 0 and set the argument err.
These functions can fail with:
- [
DW_DLE_ARGUMENT
]
- Argument dbg was NULL.
- [
DW_DLE_ARGUMENT
]
- Argument end_symbol_index was non-zero, but the flag
DW_DLC_SYMBOLIC_RELOCATIONS
was not set on the
producer instance.
- [
DW_DLE_MEMORY
]
- An out of memory condition was encountered during the execution of the
function.