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sparc64: Convert U1copy_{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 11:32:12 -07:00
parent d0796b555b
commit cb736fdbb2
3 changed files with 235 additions and 122 deletions
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arch/sparc/lib/U1copy_from_user.S
+4 -4
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@@ -3,19 +3,19 @@
* Copyright (C) 1999, 2000, 2004 David S. Miller (davem@redhat.com)
*/
#define EX_LD(x) \
#define EX_LD(x,y) \
98: x; \
.section __ex_table,"a";\
.align 4; \
.word 98b, __retl_mone; \
.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_fp;\
.word 98b, y; \
.text; \
.align 4;
arch/sparc/lib/U1copy_to_user.S
+4 -4
View File
@@ -3,19 +3,19 @@
* Copyright (C) 1999, 2000, 2004 David S. Miller (davem@redhat.com)
*/
#define EX_ST(x) \
#define EX_ST(x,y) \
98: x; \
.section __ex_table,"a";\
.align 4; \
.word 98b, __retl_mone; \
.word 98b, y; \
.text; \
.align 4;
#define EX_ST_FP(x) \
#define EX_ST_FP(x,y) \
98: x; \
.section __ex_table,"a";\
.align 4; \
.word 98b, __retl_mone_fp;\
.word 98b, y; \
.text; \
.align 4;
arch/sparc/lib/U1memcpy.S
+227 -114
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