binpatch is used to modify or examine the data associated with a symbol in a binary file
binfile.
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.