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From: Oleksandr Tymoshenko <gonzo@FreeBSD.org>
To: Perforce Change Reviews <perforce@FreeBSD.org>
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Subject: PERFORCE change 110377 for review
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http://perforce.freebsd.org/chv.cgi?CH=110377

Change 110377 by gonzo@gonzo_hq on 2006/11/22 11:21:40

	o Add copyin implementation.

Affected files ...

.. //depot/projects/mips2/src/sys/mips/mips/support.S#9 edit

Differences ...

==== //depot/projects/mips2/src/sys/mips/mips/support.S#9 (text+ko) ====

@@ -284,10 +284,27 @@
  * copyin(9)
  * <v0>int copyin(<a0>const void *useraddr, <a1>void *kernaddr, <a2>size_t len)
  */
-ENTRY(copyin)
-	break
-	jr	ra
-	nop
+NESTED(copyin, CALLFRAME_SIZ, ra)
+	subu	sp, sp, CALLFRAME_SIZ
+	.mask	0x80000000, -4
+	sw	ra, CALLFRAME_RA(sp)
+	blt	a0, zero, _C_LABEL(copyerr)
+	move	v0, a0				# swap a0, a1 for call to memcpy
+	move	a0, a1
+	move	a1, v0
+	lw	t2, pcpup
+	lw	v1, PC_CURPCB(t2)
+	la	v0, _C_LABEL(copyerr)
+	jal	memcpy
+	sw	v0, PCB_ONFAULT(v1)
+
+	lw	t2, pcpup
+	lw	v1, PC_CURPCB(t2)
+	lw	ra, CALLFRAME_RA(sp)
+	addu	sp, sp, CALLFRAME_SIZ
+	sw	zero, PCB_ONFAULT(v1)
+	j	ra
+	move	v0, zero
 END(copyin)
 
 /*