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tile: use proper .align directives on __ex_table sections 

This may fix a reported bug where an R_TILEGX_64 in a module was not
pointing to an aligned address.

Reported-by: Simon Marchi <simon.marchi@polymtl.ca>
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
This commit is contained in:
Chris Metcalf 2013-08-09 15:38:43 -04:00
parent 3fa17c395b
commit d4d9eab4ad
7 changed files with 24 additions and 0 deletions
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1
arch/tile/include/asm/futex.h
View File

@ -43,6 +43,7 @@
".pushsection .fixup,\"ax\"\n" \
"0: { movei %0, %5; j 9f }\n" \
".section __ex_table,\"a\"\n" \
".align 8\n" \
".quad 1b, 0b\n" \
".popsection\n" \
"9:" \

6
arch/tile/include/asm/uaccess.h
View File

@ -127,8 +127,10 @@ extern int fixup_exception(struct pt_regs *regs);
#ifdef __LP64__
#define _ASM_PTR ".quad"
#define _ASM_ALIGN ".align 8"
#else
#define _ASM_PTR ".long"
#define _ASM_ALIGN ".align 4"
#endif
#define __get_user_asm(OP, x, ptr, ret) \
@ -137,6 +139,7 @@ extern int fixup_exception(struct pt_regs *regs);
"0: { movei %1, 0; movei %0, %3 }\n" \
"j 9f\n" \
".section __ex_table,\"a\"\n" \
_ASM_ALIGN "\n" \
_ASM_PTR " 1b, 0b\n" \
".popsection\n" \
"9:" \
@ -168,6 +171,7 @@ extern int fixup_exception(struct pt_regs *regs);
"0: { movei %1, 0; movei %2, 0 }\n" \
"{ movei %0, %4; j 9f }\n" \
".section __ex_table,\"a\"\n" \
".align 4\n" \
".word 1b, 0b\n" \
".word 2b, 0b\n" \
".popsection\n" \
@ -224,6 +228,7 @@ extern int __get_user_bad(void)
".pushsection .fixup,\"ax\"\n" \
"0: { movei %0, %3; j 9f }\n" \
".section __ex_table,\"a\"\n" \
_ASM_ALIGN "\n" \
_ASM_PTR " 1b, 0b\n" \
".popsection\n" \
"9:" \
@ -248,6 +253,7 @@ extern int __get_user_bad(void)
".pushsection .fixup,\"ax\"\n" \
"0: { movei %0, %4; j 9f }\n" \
".section __ex_table,\"a\"\n" \
".align 4\n" \
".word 1b, 0b\n" \
".word 2b, 0b\n" \
".popsection\n" \

1
arch/tile/lib/atomic_asm_32.S
View File

@ -164,6 +164,7 @@ STD_ENTRY_SECTION(__atomic\name, .text.atomic)
STD_ENDPROC(__atomic\name)
.ifc \bitwidth,32
.pushsection __ex_table,"a"
.align 4
.word 1b, __atomic\name
.word 2b, __atomic\name
.word __atomic\name, __atomic_bad_address

2
arch/tile/lib/memcpy_32.S
View File

@ -44,6 +44,7 @@
*/
#define EX \
.pushsection __ex_table, "a"; \
.align 4; \
.word 9f, memcpy_common_fixup; \
.popsection; \
9
@ -614,5 +615,6 @@ memcpy_fixup_loop:
.size memcpy_common_fixup, . - memcpy_common_fixup
.section __ex_table,"a"
.align 4
.word .Lcfu, .Lcopy_from_user_fixup_zero_remainder
.word .Lctu, .Lcopy_to_user_fixup_done

2
arch/tile/lib/memcpy_user_64.c
View File

@ -31,6 +31,7 @@
".pushsection .coldtext.memcpy,\"ax\";" \
"2: { move r0, %2; jrp lr };" \
".section __ex_table,\"a\";" \
".align 8;" \
".quad 1b, 2b;" \
".popsection" \
: "=m" (*(p)) : "r" (v), "r" (n)); \
@ -43,6 +44,7 @@
".pushsection .coldtext.memcpy,\"ax\";" \
"2: { move r0, %2; jrp lr };" \
".section __ex_table,\"a\";" \
".align 8;" \
".quad 1b, 2b;" \
".popsection" \
: "=r" (__v) : "m" (*(p)), "r" (n)); \

6
arch/tile/lib/usercopy_32.S
View File

@ -36,6 +36,7 @@ strnlen_user_fault:
{ move r0, zero; jrp lr }
ENDPROC(strnlen_user_fault)
.section __ex_table,"a"
.align 4
.word 1b, strnlen_user_fault
.popsection
@ -59,6 +60,7 @@ strncpy_from_user_fault:
{ movei r0, -EFAULT; jrp lr }
ENDPROC(strncpy_from_user_fault)
.section __ex_table,"a"
.align 4
.word 1b, strncpy_from_user_fault
.popsection
@ -77,6 +79,7 @@ STD_ENTRY(clear_user_asm)
bnzt r1, 1b
2: { move r0, r1; jrp lr }
.pushsection __ex_table,"a"
.align 4
.word 1b, 2b
.popsection
@ -86,6 +89,7 @@ STD_ENTRY(clear_user_asm)
2: { move r0, r1; jrp lr }
STD_ENDPROC(clear_user_asm)
.pushsection __ex_table,"a"
.align 4
.word 1b, 2b
.popsection
@ -105,6 +109,7 @@ STD_ENTRY(flush_user_asm)
2: { move r0, r1; jrp lr }
STD_ENDPROC(flush_user_asm)
.pushsection __ex_table,"a"
.align 4
.word 1b, 2b
.popsection
@ -124,5 +129,6 @@ STD_ENTRY(finv_user_asm)
2: { move r0, r1; jrp lr }
STD_ENDPROC(finv_user_asm)
.pushsection __ex_table,"a"
.align 4
.word 1b, 2b
.popsection

6
arch/tile/lib/usercopy_64.S
View File

@ -36,6 +36,7 @@ strnlen_user_fault:
{ move r0, zero; jrp lr }
ENDPROC(strnlen_user_fault)
.section __ex_table,"a"
.align 8
.quad 1b, strnlen_user_fault
.popsection
@ -59,6 +60,7 @@ strncpy_from_user_fault:
{ movei r0, -EFAULT; jrp lr }
ENDPROC(strncpy_from_user_fault)
.section __ex_table,"a"
.align 8
.quad 1b, strncpy_from_user_fault
.popsection
@ -77,6 +79,7 @@ STD_ENTRY(clear_user_asm)
bnezt r1, 1b
2: { move r0, r1; jrp lr }
.pushsection __ex_table,"a"
.align 8
.quad 1b, 2b
.popsection
@ -86,6 +89,7 @@ STD_ENTRY(clear_user_asm)
2: { move r0, r1; jrp lr }
STD_ENDPROC(clear_user_asm)
.pushsection __ex_table,"a"
.align 8
.quad 1b, 2b
.popsection
@ -105,6 +109,7 @@ STD_ENTRY(flush_user_asm)
2: { move r0, r1; jrp lr }
STD_ENDPROC(flush_user_asm)
.pushsection __ex_table,"a"
.align 8
.quad 1b, 2b
.popsection
@ -124,5 +129,6 @@ STD_ENTRY(finv_user_asm)
2: { move r0, r1; jrp lr }
STD_ENDPROC(finv_user_asm)
.pushsection __ex_table,"a"
.align 8
.quad 1b, 2b
.popsection