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.
dwarf(3),
dwarf_get_relocation_info(3),
dwarf_producer_init(3),
dwarf_producer_init_b(3)