mirror of https://gitee.com/openkylin/linux.git
35 lines
430 B
ArmAsm
35 lines
430 B
ArmAsm
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;;; strncpy.S
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#include <asm/linkage.h>
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.text
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.global strncpy_from_user
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;;; long strncpy_from_user(void *to, void *from, size_t n)
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strncpy_from_user:
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mov.l er2,er2
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bne 1f
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sub.l er0,er0
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rts
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1:
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mov.l er4,@-sp
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sub.l er3,er3
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2:
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mov.b @er1+,r4l
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mov.b r4l,@er0
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adds #1,er0
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beq 3f
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inc.l #1,er3
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dec.l #1,er2
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bne 2b
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3:
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dec.l #1,er2
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4:
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mov.b r4l,@er0
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adds #1,er0
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dec.l #1,er2
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bne 4b
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mov.l er3,er0
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mov.l @sp+,er4
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rts
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