Add a copyin32() implementation.

diff --git a/sys/arch/sh/sh/locore_subr.S b/sys/arch/sh/sh/locore_subr.S
index 5ee3cd9..97ed4c4 100644 (file)
--- 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)