diff options
| author | Samuel Thibault <samuel.thibault@ens-lyon.org> | 2014-07-06 16:22:19 +0200 |
|---|---|---|
| committer | Samuel Thibault <samuel.thibault@ens-lyon.org> | 2014-07-06 16:22:22 +0200 |
| commit | e1950ac15cf03f297253ade4caa69b8733ec396f (patch) | |
| tree | 7d12504ee4afc3ae970d0c77cdde67d26630a70c /microkernel | |
| parent | 38522201c47cb2238b4dc5a2c722825badfa9ae9 (diff) | |
Add programmatic hardware watchpoints documentation
Diffstat (limited to 'microkernel')
| -rw-r--r-- | microkernel/mach/gnumach/debugging.mdwn | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/microkernel/mach/gnumach/debugging.mdwn b/microkernel/mach/gnumach/debugging.mdwn index cf02471d..c5c592b7 100644 --- a/microkernel/mach/gnumach/debugging.mdwn +++ b/microkernel/mach/gnumach/debugging.mdwn @@ -65,9 +65,12 @@ Another interesting feature is watching a variable, by using watch 0x123400 -and then type continue, to let Mach continue execution. The debugger will be entered again on any change in that variable. The watch is implemented in hardware, so it does not disturb or slow down execution at all. +and then type continue, to let Mach continue execution. The debugger will be entered again on any change in that variable. The watch is implemented in hardware, so it does not disturb or slow down execution at all. The same can be achieved programmatically, e.g. using + struct db_watchpoint watch = { .task = NULL, .loaddr= 0x40e, .hiaddr = 0x40e+2, .link = NULL}; + db_set_hw_watchpoint(&watch, 0); + # GDB in QEMU When you're [[running_a_system_in_QEMU|hurd/running/qemu]] you can directly |