The issue shows up when using STM32F769. In conjunction with st-utils.
Output:
(gdb) target extended-remote :4242
Remote debugging using :4242
2016-08-08T23:45:14 INFO .../stlink/src/gdbserver/gdb-server.c: Found 8 hw breakpoint registers
2016-08-08T23:45:14 INFO .../stlink/src/gdbserver/gdb-server.c: GDB connected.
0x08000340 in ?? ()
(gdb) x/x 0x2004f000
0x2004f000: 0x0a843b1c
(gdb) x/x 0x20050000
0x20050000: Cannot access memory at address 0x20050000
Expected/description:
I should be able to dump memory all the way up to 0x2007ffff
I can look into a fix if you want.