In gdb, how can I write a string to memory?

Question

It is quite straightforward to write ints or hexadecimals to a memory address with gdb:

(gdb) set {int}0x08040000 = 42
(gdb) set {int}0x08040000 = 0xffffffff         


        

Answer 1

Use strcpy()

(gdb) p malloc(20)
$3 = (void *) 0x6ce81808
(gdb) p strcpy($3, "my string")
$4 = 1827149832
(gdb) x/s $3
0x6ce81808: "my string"