DWARF_PRODUCER_INIT(3) | Library Functions Manual | DWARF_PRODUCER_INIT(3) |
dwarf_producer_init
dwarf_producer_init_b
—
#include <libdwarf.h>
Dwarf_P_Debug
dwarf_producer_init
(Dwarf_Unsigned
flags, Dwarf_Callback_Func func,
Dwarf_Handler errhand, Dwarf_Ptr
errarg, Dwarf_Error *err);
Dwarf_P_Debug
dwarf_producer_init_b
(Dwarf_Unsigned
flags, Dwarf_Callback_Func_b func,
Dwarf_Handler errhand, Dwarf_Ptr
errarg, Dwarf_Error *error);
The argument errhand should contain the
address of a function to be called in case of an error. If this argument is
NULL
, the default error handling scheme is used, see
dwarf(3).
The argument errarg will be passed to the error handler function when it is invoked.
The argument err references a memory location that would hold a Dwarf_Error descriptor in case of an error.
The argument flags specifies additional characteristics of the DWARF producer instance. The following flags are recognized:
DW_DLC_ISA_IA64
DW_DLC_ISA_MIPS
DW_DLC_SIZE_32
DW_DLC_SIZE_64
DW_DLC_STREAM_RELOCATIONS
DW_DLC_SYMBOLIC_RELOCATIONS
DW_DLC_TARGET_BIGENDIAN
DW_DLC_TARGET_LITTLEENDIAN
DW_DLC_WRITE
The following flags are mutually exclusive.
DW_DLC_ISA_IA64
and
DW_DLC_ISA_MIPS
.DW_DLC_SIZE_32
and
DW_DLC_SIZE_64
.DW_DLC_STREAM_RELOCATIONS
and
DW_DLC_SYMBOLIC_RELOCATIONS
.DW_DLC_TARGET_BIGENDIAN
and
DW_DLC_TARGET_LITTLEENDIAN
.DW_DLC_TARGET_BIGENDIAN
and
DW_DLC_TARGET_LITTLEENDIAN
is set, the target's
endianness is assumed to be the same as the host's endianness.
Argument func should point to an
application-provided callback function of type
Dwarf_Callback_Func_b. The type
Dwarf_Callback_Func_b is defined in the header file
<libdwarf.h>
as:
typedef int (*Dwarf_Callback_Func_b)(char *name, int size, Dwarf_Unsigned type, Dwarf_Unsigned flags, Dwarf_Unsigned link, Dwarf_Unsigned info, Dwarf_Unsigned *index, int *error);
This function is called by the DWARF Access Library (libdwarf, -ldwarf) once for each section in the object file that the library needs to create. The arguments to this callback function specify the values in the ELF section header for the section being created:
On success, the callback function should return the section index value of the created section, and set the location pointed to by argument index to the symbol table index of the symbol that associated with the newly created section. This symbol table index will be used in relocation entries referring to the created section.
In case of failure, the callback function should return -1 and set the location pointed to by argument error to an application-defined error code. This application returned error code is currently ignored by the library.
Function dwarf_producer_init
() is
deprecated. Function dwarf_producer_init
() is
identical to function dwarf_producer_init_b
() except
that the callback function it expects can not properly handle arbitrary
section symbol index values.
dwarf_producer_finish
().
DW_DLV_BADADDR
and set
the argument err.
DW_DLE_ARGUMENT
]DW_DLE_ARGUMENT
]DW_DLC_WRITE
was not set in argument
flags.DW_DLE_ARGUMENT
]DW_DLC_SIZE_32
and
DW_DLC_SIZE_64
were both set in argument
flags.DW_DLE_ARGUMENT
]DW_DLC_ISA_IA64
and
DW_DLC_ISA_MIPS
were both set in argument
flags.DW_DLE_ARGUMENT
]DW_DLC_TARGET_BIGENDIAN
and
DW_DLC_TARGET_LITTLEENDIAN
were both set in
argument flags.DW_DLE_ARGUMENT
]DW_DLC_STREAM_RELOCATIONS
and
DW_DLC_SYMBOLIC_RELOCATIONS
were both set in
argument flags.DW_DLE_MEMORY
]Dwarf_P_Debug dbg; Dwarf_Unsigned flags; Dwarf_Error de; /* ... assume cb_func points to the callback function ... */ flags = DW_DLC_WRITE | DW_DLC_SIZE_32 | DW_DLC_ISA_MIPS | DW_DLC_STREAM_RELOCATIONS | DW_DLC_TARGET_BIGENDIAN; if ((dbg = dwarf_producer_init(flags, cb_func, NULL, NULL, &de)) == DW_DLV_BADADDR) warnx("dwarf_producer_init failed: %s", dwarf_errmsg(-1));
August 20, 2011 | NetBSD 9.0 |