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MIPS: Apply `.insn' to fixup labels throughout

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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>
This commit is contained in:
Maciej W. Rozycki 2014-11-15 22:09:31 +00:00 • committed by Ralf Baechle
commit 0e525e48f7
3 changed files with 8 additions and 0 deletions
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2
arch/mips/kernel/syscall.c
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@ -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"