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sparc64: Convert NG4copy_{from,to}_user to accurate exception reporting.

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Report the exact number of bytes which have not been successfully
copied when an exception occurs, using the running remaining length.

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller
2016-10-24 18:58:05 -07:00
parent cb736fdbb2
commit 9570770480
3 changed files with 231 additions and 79 deletions
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8
arch/sparc/lib/NG4copy_from_user.S
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@@ -3,19 +3,19 @@
* Copyright (C) 2012 David S. Miller (davem@davemloft.net)
*/
#define EX_LD(x) \
#define EX_LD(x, y) \
98: x; \
.section __ex_table,"a";\
.align 4; \
.word 98b, __retl_mone_asi;\
.word 98b, y; \
.text; \
.align 4;
#define EX_LD_FP(x) \
#define EX_LD_FP(x,y) \
98: x; \
.section __ex_table,"a";\
.align 4; \
.word 98b, __retl_mone_asi_fp;\
.word 98b, y##_fp; \
.text; \
.align 4;