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# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#
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#
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- 
 
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#include <arch/arch.h>
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#include <arch/stack.h>
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#include <arch/stack.h>
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#include <arch/regdef.h>
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#include <arch/regdef.h>
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#include <arch/mm/mmu.h>
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#include <arch/mm/mmu.h>
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.text
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.text
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.global memcpy
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.global memcpy_from_uspace
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.register       %g2, #scratch
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.global memcpy_to_uspace
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.register       %g3, #scratch
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.global memcpy_from_uspace_failover_address
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.global memcpy_to_uspace_failover_address
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.global memsetb
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/*
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 * This is the assembly language version of our _memcpy() generated by gcc.
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 */
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.global memcpy
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memcpy:
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memcpy:
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memcpy_from_uspace:
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memcpy_to_uspace:
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	.register       %g2, #scratch
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        .register       %g3, #scratch
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	add	%o1, 7, %g1
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	add	%o1, 7, %g1
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	and	%g1, -8, %g1
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	and	%g1, -8, %g1
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	cmp	%o1, %g1
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	cmp	%o1, %g1
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	be,pn	%xcc, 3f
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	be,pn	%xcc, 3f
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	add	%o0, 7, %g1
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	add	%o0, 7, %g1
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	mov	%g2, %g3
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	mov	%g2, %g3
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	jmp	%o7 + 8			! exit point
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	jmp	%o7 + 8			! exit point
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	mov	%o1, %o0
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	mov	%o1, %o0
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- 
 
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/*
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 * Almost the same as memcpy() except the loads are from userspace.
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 */
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.global memcpy_from_uspace
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memcpy_from_uspace:
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	add	%o1, 7, %g1
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	and	%g1, -8, %g1
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	cmp	%o1, %g1
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	be,pn	%xcc, 3f
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	add	%o0, 7, %g1
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	mov	0, %g3
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0:
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	brz,pn	%o2, 2f
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	mov	0, %g2
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1:
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	lduba	[%g3 + %o1] ASI_AIUS, %g1
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	add	%g2, 1, %g2
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	cmp	%o2, %g2
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	stb	%g1, [%g3 + %o0]
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	bne,pt	%xcc, 1b
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	mov	%g2, %g3
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2:
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	jmp	%o7 + 8			! exit point
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	mov	%o1, %o0
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3:
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	and	%g1, -8, %g1
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	cmp	%o0, %g1
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	bne,pt	%xcc, 0b
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	mov	0, %g3
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	srlx	%o2, 3, %g4
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	brz,pn	%g4, 5f
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	mov	0, %g5
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4:
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	sllx	%g3, 3, %g2
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	add	%g5, 1, %g3
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	ldxa	[%o1 + %g2] ASI_AIUS, %g1
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	mov	%g3, %g5
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	cmp	%g4, %g3
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	bne,pt	%xcc, 4b
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	stx	%g1, [%o0 + %g2]
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5:
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	and	%o2, 7, %o2
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	brz,pn	%o2, 2b
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	sllx	%g4, 3, %g1
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	mov	0, %g2
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	add	%g1, %o0, %o0
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	add	%g1, %o1, %g4
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	mov	0, %g3
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6:
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	lduba	[%g2 + %g4] ASI_AIUS, %g1
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	stb	%g1, [%g2 + %o0]
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	add	%g3, 1, %g2
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	cmp	%o2, %g2
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	bne,pt	%xcc, 6b
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	mov	%g2, %g3
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	jmp	%o7 + 8			! exit point
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	mov	%o1, %o0
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/*
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 * Almost the same as memcpy() except the stores are to userspace.
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 */
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.global memcpy_to_uspace
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memcpy_to_uspace:
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	add	%o1, 7, %g1
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	and	%g1, -8, %g1
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	cmp	%o1, %g1
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	be,pn	%xcc, 3f
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	add	%o0, 7, %g1
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	mov	0, %g3
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0:
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	brz,pn	%o2, 2f
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	mov	0, %g2
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1:
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	ldub	[%g3 + %o1], %g1
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	add	%g2, 1, %g2
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	cmp	%o2, %g2
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	stba	%g1, [%g3 + %o0] ASI_AIUS
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	bne,pt	%xcc, 1b
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	mov	%g2, %g3
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2:
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	jmp	%o7 + 8			! exit point
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	mov	%o1, %o0
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3:
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	and	%g1, -8, %g1
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	cmp	%o0, %g1
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	bne,pt	%xcc, 0b
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	mov	0, %g3
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	srlx	%o2, 3, %g4
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	brz,pn	%g4, 5f
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	mov	0, %g5
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4:
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	sllx	%g3, 3, %g2
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	add	%g5, 1, %g3
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	ldx	[%o1 + %g2], %g1
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	mov	%g3, %g5
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	cmp	%g4, %g3
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	bne,pt	%xcc, 4b
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	stxa	%g1, [%o0 + %g2] ASI_AIUS
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5:
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	and	%o2, 7, %o2
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	brz,pn	%o2, 2b
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	sllx	%g4, 3, %g1
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	mov	0, %g2
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	add	%g1, %o0, %o0
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	add	%g1, %o1, %g4
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	mov	0, %g3
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6:
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	ldub	[%g2 + %g4], %g1
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	stba	%g1, [%g2 + %o0] ASI_AIUS
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	add	%g3, 1, %g2
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	cmp	%o2, %g2
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	bne,pt	%xcc, 6b
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	mov	%g2, %g3
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	jmp	%o7 + 8			! exit point
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	mov	%o1, %o0
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.global memcpy_from_uspace_failover_address
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.global memcpy_to_uspace_failover_address
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memcpy_from_uspace_failover_address:
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memcpy_from_uspace_failover_address:
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memcpy_to_uspace_failover_address:
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memcpy_to_uspace_failover_address:
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	jmp	%o7 + 8			! exit point
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	jmp	%o7 + 8			! exit point
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	mov	%g0, %o0		! return 0 on failure
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	mov	%g0, %o0		! return 0 on failure
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- 
 
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.global memsetb
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memsetb:
 224 
memsetb:
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	b _memsetb
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	b _memsetb
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	nop
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	nop
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 * %o1	Userspace stack pointer address.
 269 
 * %o1	Userspace stack pointer address.
153 
 * %o2  Userspace address of uarg structure.
 270 
 * %o2  Userspace address of uarg structure.
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 */
 271 
 */
155 
.global switch_to_userspace
 272 
.global switch_to_userspace
156 
switch_to_userspace:
 273 
switch_to_userspace:
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 274 
	save %o1, -STACK_WINDOW_SAVE_AREA_SIZE, %sp
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	flushw
 275 
	flushw
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	wrpr %g0, 0, %cleanwin		! avoid information leak
 276 
	wrpr %g0, 0, %cleanwin		! avoid information leak
159 
	save %o1, -STACK_WINDOW_SAVE_AREA_SIZE, %sp
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 277 
 
161 
	mov %i3, %o0			! uarg
 278 
	mov %i3, %o0			! uarg
162 
 
 279 
 
163 
	clr %i2
 280 
	clr %i2
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	clr %i3
 281 
	clr %i3