diff options
| author | Michael Shalayeff <mickey@cvs.openbsd.org> | 2002-08-03 20:19:42 +0000 |
|---|---|---|
| committer | Michael Shalayeff <mickey@cvs.openbsd.org> | 2002-08-03 20:19:42 +0000 |
| commit | 5b6ed4b991349a2b54d6369ad63b65ab7d93b3ce (patch) | |
| tree | 4539b1b27a931294220321a9f893123057bdce80 /sys | |
| parent | 8cf0b2196d22782b74d366633ca8ae0c66b4bd32 (diff) | |
store md_regs ptr before interrupts are enabled on syscall, do not store the frame pointer on the stack on traps, just offset back from sp upon return
Diffstat (limited to 'sys')
| -rw-r--r-- | sys/arch/hppa/hppa/locore.S | 28 |
1 files changed, 12 insertions, 16 deletions
diff --git a/sys/arch/hppa/hppa/locore.S b/sys/arch/hppa/hppa/locore.S index ba0fc6f9640..5569b59f8fd 100644 --- a/sys/arch/hppa/hppa/locore.S +++ b/sys/arch/hppa/hppa/locore.S @@ -1,4 +1,4 @@ -/* $OpenBSD: locore.S,v 1.76 2002/08/03 20:07:58 mickey Exp $ */ +/* $OpenBSD: locore.S,v 1.77 2002/08/03 20:19:41 mickey Exp $ */ /* * Copyright (c) 1998-2002 Michael Shalayeff @@ -564,12 +564,14 @@ $syscall * t4: user stack * */ - ldil L%curproc, t3 - ldw R%curproc(sr1, t3), t3 - ldw P_ADDR(sr1, t3), t2 /* XXX can use ,sl */ + ldil L%curproc, t2 + ldw R%curproc(sr1, t2), t2 + ldw P_ADDR(sr1, t2), t3 /* XXX can use ,sl */ /* calculate kernel sp, load, create kernel stack frame */ - ldo NBPG+TRAPFRAME_SIZEOF(t2), t3 + ldo NBPG(t3), t3 + stw t3, P_MD_REGS(sr1, t2) + ldo TRAPFRAME_SIZEOF(t3), t3 stw t4, TF_R19 -TRAPFRAME_SIZEOF(sr1, t3) /* t4 for vfork() */ stw t1, TF_R22 -TRAPFRAME_SIZEOF(sr1, t3) /* syscall # */ stw sp, TF_R30 -TRAPFRAME_SIZEOF(sr1, t3) /* user stack */ @@ -581,7 +583,7 @@ $syscall stw t1, TF_CR22-TRAPFRAME_SIZEOF(sr1, t3) /* ipsw */ mfsp sr3, t1 stw t1, TF_SR3-TRAPFRAME_SIZEOF(sr1, t3) - stw r28, TF_CR8-TRAPFRAME_SIZEOF(sr1, t3) /* pidr1 */ + stw ret0, TF_CR8-TRAPFRAME_SIZEOF(sr1, t3) /* pidr1 */ /* now we can allow interrupts to happen */ mtctl r1, eiem @@ -763,14 +765,10 @@ $syscall_return ldw 8(t3), r1 ! ldw 12(t3), t1 ! stw r1, 8(t2) ! stw t1, 12(t2) ldw 16(t3), r1 ! ldw 20(t3), t1 ! stw r1, 16(t2) ! stw t1, 20(t2) ldw 24(t3), r1 ! ldw 28(t3), t1 ! stw r1, 24(t2) ! stw t1, 28(t2) - fdc r0(t2) - ldi 32, t4 ldw 32(t3), r1 ! ldw 36(t3), t1 ! stw r1, 32(t2) ! stw t1, 36(t2) ldw 40(t3), r1 ! ldw 44(t3), t1 ! stw r1, 40(t2) ! stw t1, 44(t2) ldw 48(t3), r1 ! ldw 52(t3), t1 ! stw r1, 48(t2) ! stw t1, 52(t2) ldw 56(t3), r1 ! ldw 60(t3), t1 ! stw r1, 56(t2) ! stw t1, 60(t2) - fdc t4(t2) - sync /* 1b. restore most of the general registers */ ldw TF_CR11(t3), t1 @@ -1410,7 +1408,7 @@ $dtlbna_t copy r17, r16 ! \ depi (bits), 21+bits, 1+bits, r17 ! \ mfctl tr7, r1 ! \ - xor,= r16, r17, r0 /* do not store if unchanged */ ! \ + sub,= r16, r17, r0 /* do not store if unchanged */ ! \ stws r17, 0(r25) /* store back w/ the bits */ ! \ shd r17, r0, 13, r25 ! \ dep r8, 30, 15, r25 /* mix0r the pid from the sid */! \ @@ -1609,7 +1607,6 @@ $trapnowvirt copy sp, r3 stw,mb r0, -HPPA_FRAME_SIZE(r3) - stw t3, HPPA_FRAME_ARG(1)(sp) /* * Copy partially saved state from the store into the frame @@ -1704,17 +1701,16 @@ $trapnowvirt bv,n r0(t1) nop - ldw HPPA_FRAME_ARG(1)(sp), t3 /* see if curproc have changed */ - ldw TF_FLAGS(t3), arg0 + ldw -HPPA_FRAME_SIZE-TRAPFRAME_SIZEOF+TF_FLAGS(sp), arg0 bb,>=,n arg0, TFF_LAST_POS, $syscall_return - nop + ldo -HPPA_FRAME_SIZE-TRAPFRAME_SIZEOF(sp), t3 /* see if curproc have really changed */ ldil L%curproc, t1 ldw R%curproc(t1), t2 comb,=,n r0, t2, $syscall_return - nop + ldo -HPPA_FRAME_SIZE-TRAPFRAME_SIZEOF(sp), t3 /* means curproc have actually changed */ b $syscall_return |