(gdb) p ffi_assert
$2 = {void (char *, char *, int)} 0x7fffe9e94641 <ffi_assert>
(gdb) p dladdr(0x7fffe9e94641, 0x7fffaf09d800)
$3 = 1
(gdb) x/32b 0x7fffaf09d800
0x7fffaf09d800: -128    -111    -71     -10     -1      127     0       0
0x7fffaf09d808: 0       -128    30      -27     -1      127     0       0
0x7fffaf09d810: 83      66      40      -27     -1      127     0       0
0x7fffaf09d818: 65      70      -23     -23     -1      127     0       0
(gdb) p *(char**)(0x7fffaf09d810)
$10 = 0x7fffe5284253 "ffi_assert"