Reputation: 1518
I have gdb 7.3 and device that supports hardware watchpoints.
I type such consequent commands:
Breakpoint 1, 0x000db808 in ?? ()
(gdb) info break
Num Type Disp Enb Address What
1 breakpoint keep y 0x000db808
breakpoint already hit 1 time
(gdb) watch *0x15588a
Watchpoint 2: *0x15588a
(gdb) watch *0x1557f8
Hardware watchpoint 3: *0x1557f8
(gdb) info break
Num Type Disp Enb Address What
1 breakpoint keep y 0x000db808
breakpoint already hit 1 time
2 watchpoint keep y *0x15588a
3 hw watchpoint keep y *0x1557f8
(gdb)
Why wasn't hardware watchpoint accepted after the first command? What is wrong?
Upvotes: 4
Views: 772
Reputation: 213955
Why wasn't hardware watchpoint accepted after the first command?
You didn't tell us what processor you are using.
I am guessing that your processor does not support hardware watchpoints for addresses that are not aligned on 4-byte boundary.
GDB can't set a hardware watchpoint on an address if your hardware doesn't support such watchpoints.
Upvotes: 4