diff options
Diffstat (limited to 'sys/arch/hp300/hp300/locore.s')
| -rw-r--r-- | sys/arch/hp300/hp300/locore.s | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/sys/arch/hp300/hp300/locore.s b/sys/arch/hp300/hp300/locore.s index db3044f0e8a..8f544d3e92e 100644 --- a/sys/arch/hp300/hp300/locore.s +++ b/sys/arch/hp300/hp300/locore.s @@ -1,4 +1,4 @@ -/* $OpenBSD: locore.s,v 1.25 2001/05/13 16:55:35 millert Exp $ */ +/* $OpenBSD: locore.s,v 1.26 2001/05/13 17:19:56 millert Exp $ */ /* $NetBSD: locore.s,v 1.91 1998/11/11 06:41:25 thorpej Exp $ */ /* @@ -906,9 +906,17 @@ ENTRY_NOPROFILE(trace) clrl sp@- | stack adjust count moveml #0xFFFF,sp@- moveq #T_TRACE,d0 + + | Check PSW and see what happened. + | T=0 S=0 (should not happen) + | T=1 S=0 trace trap from user mode + | T=0 S=1 trace trap on a trap instruction + | T=1 S=1 trace trap from system mode (kernel breakpoint) + movw sp@(FR_HW),d1 | get PSW - andw #PSL_S,d1 | from system mode? - jne Lkbrkpt | yes, kernel breakpoint + notw d1 | XXX no support for T0 on 680[234]0 + andw #PSL_TS,d1 | from system mode (T=1, S=1)? + jeq Lkbrkpt | yes, kernel breakpoint jra _ASM_LABEL(fault) | no, user-mode fault /* |