diff options
Diffstat (limited to 'sys/ia64/ia64/machdep.c')
| -rw-r--r-- | sys/ia64/ia64/machdep.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/sys/ia64/ia64/machdep.c b/sys/ia64/ia64/machdep.c index ca75d2c7ce40..5c39d05c8a36 100644 --- a/sys/ia64/ia64/machdep.c +++ b/sys/ia64/ia64/machdep.c @@ -1017,6 +1017,23 @@ freebsd4_sigreturn(struct thread *td, struct freebsd4_sigreturn_args *uap) } #endif +/* + * Construct a PCB from a trapframe. This is called from kdb_trap() where + * we want to start a backtrace from the function that caused us to enter + * the debugger. We have the context in the trapframe, but base the trace + * on the PCB. The PCB doesn't have to be perfect, as long as it contains + * enough for a backtrace. + */ +void +makectx(struct trapframe *tf, struct pcb *pcb) +{ + + pcb->pcb_special = tf->tf_special; + pcb->pcb_special.__spare = ~0UL; /* XXX see unwind.c */ + save_callee_saved(&pcb->pcb_preserved); + save_callee_saved_fp(&pcb->pcb_preserved_fp); +} + int get_mcontext(struct thread *td, mcontext_t *mc, int flags) { |