The flags
-b,
-w,
-l,
and
-d
specify the size of the data to be modified or examined.
-b
is for 8bit
(int8_t),
-w
is for 16bit
(int16_t),
-l
is for 32bit
(int32_t),
and
-d
is for 64bit
(int64_t)
variables.
The binfile is scanned in search of the symbol symname (specified with the -s flag.) If the symbol is found the current data and address are printed.
Next if the -r flag has been given, the current data is replaced with that of value.
If the second form is used the address addr specified with the -a flag is used as a direct address into the data section of the binary and no symbol search is performed.
The
-o
flag specifies an offset in
int8_t,
int16_t,
int32_t,
and
int64_t
-(b,
-w,
-l,
or
-d)
units from the given locator
-(s
or
-a)
for
binpatch
to perform its described actions.
This might be useful to patch a member of array or structure.
The -T flag is used to specify the starting address of a.out binary text segment. Ignored for other binary executable formats.
The binpatch command doesn't check if specified address or symbol is a patchable variable and it might corrupt the specified executable binary.