From 0e525e48f73cc8a4df8da0be77e4146bea85e1a5 Mon Sep 17 00:00:00 2001 From: "Maciej W. Rozycki" Date: Sat, 15 Nov 2014 22:09:31 +0000 Subject: [PATCH] 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 Signed-off-by: Steven J. Hill Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/8483/ Signed-off-by: Ralf Baechle --- arch/mips/include/asm/futex.h | 4 ++++ arch/mips/include/asm/paccess.h | 2 ++ arch/mips/kernel/syscall.c | 2 ++ 3 files changed, 8 insertions(+) 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" -- 2.20.1