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authorMaciej W. Rozycki <macro@codesourcery.com>2014-11-15 22:09:31 +0000
committerRalf Baechle <ralf@linux-mips.org>2014-11-24 07:45:36 +0100
commit0e525e48f73cc8a4df8da0be77e4146bea85e1a5 (patch)
tree44d3ac8b6859b5b45ea9d58a71f7ac9f7a70336b /arch/mips
parentb0984c43702f0fe2dbb0c344843e36c8b2cd13f1 (diff)
MIPS: Apply `.insn' to fixup labels throughout
Fix the issue with the ISA bit being lost in fixups that jump to labels placed just before a section switch. Such a switch leads to the ISA bit being lost, because GAS concludes there is no code that follows and therefore the label refers to data. Use the `.insn' pseudo-op to convince the tool this is not the case. This lack of label annotation leads to microMIPS compilation errors like: mips-linux-gnu-ld: arch/mips/built-in.o: .fixup+0x3b8: Unsupported jump between ISA modes; consider recompiling with interlinking enabled. mips-linux-gnu-ld: final link failed: Bad value Signed-off-by: Maciej W. Rozycki <macro@codesourcery.com> Signed-off-by: Steven J. Hill <Steven.Hill@imgtec.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/8483/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips')
-rw-r--r--arch/mips/include/asm/futex.h4
-rw-r--r--arch/mips/include/asm/paccess.h2
-rw-r--r--arch/mips/kernel/syscall.c2
3 files changed, 8 insertions, 0 deletions
diff --git a/arch/mips/include/asm/futex.h b/arch/mips/include/asm/futex.h
index d0177bf915bb..ef9987a61d88 100644
--- a/arch/mips/include/asm/futex.h
+++ b/arch/mips/include/asm/futex.h
@@ -33,6 +33,7 @@
" beqzl $1, 1b \n" \
__WEAK_LLSC_MB \
"3: \n" \
+ " .insn \n" \
" .set pop \n" \
" .set mips0 \n" \
" .section .fixup,\"ax\" \n" \
@@ -61,6 +62,7 @@
" beqz $1, 1b \n" \
__WEAK_LLSC_MB \
"3: \n" \
+ " .insn \n" \
" .set pop \n" \
" .set mips0 \n" \
" .section .fixup,\"ax\" \n" \
@@ -162,6 +164,7 @@ futex_atomic_cmpxchg_inatomic(u32 *uval, u32 __user *uaddr,
" beqzl $1, 1b \n"
__WEAK_LLSC_MB
"3: \n"
+ " .insn \n"
" .set pop \n"
" .section .fixup,\"ax\" \n"
"4: li %0, %6 \n"
@@ -190,6 +193,7 @@ futex_atomic_cmpxchg_inatomic(u32 *uval, u32 __user *uaddr,
" beqz $1, 1b \n"
__WEAK_LLSC_MB
"3: \n"
+ " .insn \n"
" .set pop \n"
" .section .fixup,\"ax\" \n"
"4: li %0, %6 \n"
diff --git a/arch/mips/include/asm/paccess.h b/arch/mips/include/asm/paccess.h
index 2474fc5d1751..af81ab0da55f 100644
--- a/arch/mips/include/asm/paccess.h
+++ b/arch/mips/include/asm/paccess.h
@@ -56,6 +56,7 @@ struct __large_pstruct { unsigned long buf[100]; };
"1:\t" insn "\t%1,%2\n\t" \
"move\t%0,$0\n" \
"2:\n\t" \
+ ".insn\n\t" \
".section\t.fixup,\"ax\"\n" \
"3:\tli\t%0,%3\n\t" \
"move\t%1,$0\n\t" \
@@ -94,6 +95,7 @@ extern void __get_dbe_unknown(void);
"1:\t" insn "\t%1,%2\n\t" \
"move\t%0,$0\n" \
"2:\n\t" \
+ ".insn\n\t" \
".section\t.fixup,\"ax\"\n" \
"3:\tli\t%0,%3\n\t" \
"j\t2b\n\t" \
diff --git a/arch/mips/kernel/syscall.c b/arch/mips/kernel/syscall.c
index 4a4f9dda5658..604b558809c4 100644
--- a/arch/mips/kernel/syscall.c
+++ b/arch/mips/kernel/syscall.c
@@ -117,6 +117,7 @@ static inline int mips_atomic_set(unsigned long addr, unsigned long new)
"2: sc %[tmp], (%[addr]) \n"
" beqzl %[tmp], 1b \n"
"3: \n"
+ " .insn \n"
" .section .fixup,\"ax\" \n"
"4: li %[err], %[efault] \n"
" j 3b \n"
@@ -142,6 +143,7 @@ static inline int mips_atomic_set(unsigned long addr, unsigned long new)
"2: sc %[tmp], (%[addr]) \n"
" bnez %[tmp], 4f \n"
"3: \n"
+ " .insn \n"
" .subsection 2 \n"
"4: b 1b \n"
" .previous \n"