DBX_REGISTER_NUMBER (regno)
If two registers have consecutive numbers inside GNU CC, and they can be
used as a pair to hold a multiword value, then they must have
consecutive numbers after renumbering with DBX_REGISTER_NUMBER
.
Otherwise, debuggers will be unable to access such a pair, because they
expect register pairs to be consecutive in their own numbering scheme.
If you find yourself defining DBX_REGISTER_NUMBER
in way that
does not preserve register pairs, then what you must do instead is
redefine the actual register numbering scheme.
DEBUGGER_AUTO_OFFSET (x)
-g
' options is used.
DEBUGGER_ARG_OFFSET (offset, x)
PREFERRED_DEBUGGING_TYPE
-g
' or `-ggdb
'. Define this if you
have arranged for GNU CC to support more than one format of debugging
output. Currently, the allowable values are DBX_DEBUG
,
SDB_DEBUG
, DWARF_DEBUG
, and XCOFF_DEBUG
.
The value of this macro only affects the default debugging output; the
user can always get a specific type of output by using `-gstabs
',
`-gcoff
', `-gdwarf
', or `-gxcoff
'.