?? uaccess.s
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/* * arch/s390/lib/uaccess.S * fixup routines for copy_{from|to}_user functions. * * s390 * Copyright (C) 2000 IBM Deutschland Entwicklung GmbH, IBM Corporation * Authors(s): Martin Schwidefsky (schwidefsky@de.ibm.com) * * These functions have standard call interface */#include <asm/lowcore.h> .text .align 4 .globl __copy_from_user_asm__copy_from_user_asm: lr %r5,%r3 sacf 5120: mvcle %r2,%r4,0 jo 0b sacf 0 lr %r2,%r5 br %r141: l %r1,__LC_PGM_OLD_PSW+4 sll %r4,1 srl %r4,12: lhi %r3,-4096 sll %r3,1 srl %r3,1 n %r3,__LC_TRANS_EXC_ADDR sr %r3,%r4 bm 4(%r1)3: mvcle %r2,%r4,0 b 4(%r1) .section __ex_table,"a" .long 0b,1b .long 3b,2b .previous .align 4 .text .globl __copy_to_user_asm__copy_to_user_asm: lr %r5,%r3 sacf 5120: mvcle %r4,%r2,0 jo 0b sacf 0 lr %r2,%r3 br %r141: l %r1,__LC_PGM_OLD_PSW+4 sll %r4,1 srl %r4,12: lhi %r5,-4096 sll %r5,1 srl %r5,1 n %r5,__LC_TRANS_EXC_ADDR sr %r5,%r4 bm 4(%r1)3: mvcle %r4,%r2,0 b 4(%r1) .section __ex_table,"a" .long 0b,1b .long 3b,2b .previous .align 4 .text .globl __clear_user_asm__clear_user_asm: lr %r4,%r2 lr %r5,%r3 sr %r2,%r2 sr %r3,%r3 sacf 5120: mvcle %r4,%r2,0 jo 0b sacf 0 lr %r2,%r3 br %r141: l %r1,__LC_PGM_OLD_PSW+4 sll %r4,1 srl %r4,12: lhi %r5,-4096 sll %r5,1 srl %r5,1 n %r5,__LC_TRANS_EXC_ADDR sr %r5,%r4 bm 4(%r1)3: mvcle %r4,%r2,0 b 4(%r1) .section __ex_table,"a" .long 0b,1b .long 3b,2b .previous?? 快捷鍵說明
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