diff options
Diffstat (limited to 'sys/arch/sh')
| -rw-r--r-- | sys/arch/sh/sh/locore_subr.S | 52 |
1 files changed, 51 insertions, 1 deletions
diff --git a/sys/arch/sh/sh/locore_subr.S b/sys/arch/sh/sh/locore_subr.S index 5ee3cd907a5..97ed4c4fbef 100644 --- a/sys/arch/sh/sh/locore_subr.S +++ b/sys/arch/sh/sh/locore_subr.S @@ -1,4 +1,4 @@ -/* $OpenBSD: locore_subr.S,v 1.15 2023/01/31 15:18:55 deraadt Exp $ */ +/* $OpenBSD: locore_subr.S,v 1.16 2023/08/14 07:40:08 miod Exp $ */ /* $NetBSD: locore_subr.S,v 1.28 2006/01/23 22:52:09 uwe Exp $ */ /* @@ -665,6 +665,56 @@ ENTRY(_copyin) .long memcpy SET_ENTRY_SIZE(_copyin) +/* + * int copyin32(const void *usrc, void *kdst) + */ +ENTRY(copyin32) + mov.l r14, @-r15 + sts.l pr, @-r15 + mov r15, r14 + + mov #3, r3 + mov #EFAULT, r0 /* assume there was a problem */ + and r4, r3 + tst r3, r3 + bf 2f /* punt if not aligned */ + + mov.l .L_copyin32_VM_MAXUSER_ADDRESS, r1 + cmp/hi r1, r4 /* bomb if uaddr isn't in user space */ + bt 2f + + mov.l .L_copyin32_curpcb, r1 /* set fault handler */ + mov.l @r1, r2 + mov.l .L_copyin32_onfault, r3 + mov.l r3, @(PCB_ONFAULT,r2) + + mov.l @r4, r1 + mov #0, r0 + mov.l r1, @r5 + mov.l r0, @(PCB_ONFAULT,r2) +2: + mov r14, r15 + lds.l @r15+, pr + rts + mov.l @r15+, r14 + +3: + mov.l .L_copyin32_curpcb, r1 /* clear fault handler */ + mov.l @r1, r2 + mov #0, r1 + mov.l r1, @(PCB_ONFAULT,r2) + + bra 2b + mov #EFAULT, r0 + + .align 2 +.L_copyin32_onfault: + .long 3b +.L_copyin32_VM_MAXUSER_ADDRESS: + .long VM_MAXUSER_ADDRESS - 4 /* sizeof(uint32_t) */ +.L_copyin32_curpcb: + .long curpcb + SET_ENTRY_SIZE(copyin32) /* * LINTSTUB: Func: int copyoutstr(const void *ksrc, void *udst, size_t maxlen, size_t *lencopied) |