binpatch(8)
- NetBSD Manual Pages
BINPATCH(8) NetBSD/atari System Manager's Manual BINPATCH(8)
NAME
binpatch -- examine and or modify initialized data in an executable
binary
SYNOPSIS
binpatch [-b | -w | -l | -d] [-o offset] [-T saddr] -s symname [-r value]
binfile
binpatch [-b | -w | -l | -d] [-o offset] [-T saddr] -a addr [-r value]
binfile
DESCRIPTION
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 sym-
bol 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.
SEE ALSO
gdb(1), mdsetimage(8)
BUGS
The binpatch command doesn't check if size of specified symbol is the
same as the specified size by -b, -w, -l, or -d flag.
The binpatch command doesn't check if specified address or symbol is a
patchable variable and it might corrupt the specified executable binary.
NetBSD 10.99 August 20, 2009 NetBSD 10.99
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