NAME
dwarf_get_arange_info —
extract address
range information from a descriptor
LIBRARY
DWARF Access Library (libdwarf, -ldwarf)
SYNOPSIS
#include <libdwarf.h>
int
dwarf_get_arange_info(
Dwarf_Arange ar,
Dwarf_Addr *start,
Dwarf_Unsigned
*length,
Dwarf_Off *cu_die_offset,
Dwarf_Error *err);
DESCRIPTION
Function
dwarf_get_arange_info() extracts address range
information from a
Dwarf_Arange descriptor.
Argument
ar should reference a valid
Dwarf_Arange descriptor returned by function
dwarf_get_aranges(3).
Argument
start should point to a location which will hold
the start value of the address range associated with the descriptor.
Argument
length should point to a location which will hold
the length in bytes of the address range associated with the descriptor.
Argument
cu_die_offset should point to a location which
will be set to an offset, relative to the “.debug_info” section,
of the first debugging information entry in the compilation unit associated
with argument
ar.
If argument
err is not NULL, it will be used to store
error information in case of an error.
RETURN VALUES
Function
dwarf_get_arange_info() returns
DW_DLV_OK
when it succeeds. In case of an error, it
returns
DW_DLV_ERROR
and sets the argument
err.
ERRORS
Function
dwarf_get_arange_info() can fail with:
-
-
- [
DW_DLE_ARGUMENT
]
- One of the arguments ar,
start, length or
cu_die_offset was NULL.
EXAMPLE
To loop through all the address lookup table entries, use:
Dwarf_Debug dbg;
Dwarf_Addr start;
Dwarf_Arange *aranges;
Dwarf_Off die_off;
Dwarf_Signed i, cnt;
Dwarf_Unsigned length;
Dwarf_Error de;
if (dwarf_get_aranges(dbg, &aranges, &cnt, &de) != DW_DLV_OK)
errx(EXIT_FAILURE, "dwarf_get_aranges: %s",
dwarf_errmsg(de));
for (i = 0; i < cnt; i++) {
if (dwarf_get_arange_info(aranges[i], &start, &length,
&die_off, &de) != DW_DLV_OK) {
warnx("dwarf_get_arange_info: %s",
dwarf_errmsg(de));
continue;
}
/* Do something with the returned information. */
}
SEE ALSO
dwarf(3),
dwarf_get_arange(3),
dwarf_get_aranges(3),
dwarf_get_arange_cu_header_offset(3),
dwarf_get_cu_die_offset(3)