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riscv: stack: Fixup independent irq stack for CONFIG_FRAME_POINTER=n

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The independent irq stack uses s0 to save & restore sp, but s0 would be
corrupted when CONFIG_FRAME_POINTER=n. So add s0 in the clobber list to
fix the problem.

Fixes: 163e76cc6e ("riscv: stack: Support HAVE_IRQ_EXIT_ON_IRQ_STACK")
Cc: stable@vger.kernel.org
Reported-by: Zhangjin Wu <falcon@tinylab.org>
Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
Signed-off-by: Guo Ren <guoren@kernel.org>
Tested-by: Drew Fustini <dfustini@baylibre.com>
Link: https://lore.kernel.org/r/20230716001506.3506041-2-guoren@kernel.org
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
This commit is contained in:
Guo Ren 2023-07-15 20:15:05 -04:00 committed by Palmer Dabbelt
parent 79bc3f85c5
commit 8d0be64154
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1 changed files with 3 additions and 0 deletions
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3
arch/riscv/kernel/traps.c
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@ -372,6 +372,9 @@ asmlinkage void noinstr do_irq(struct pt_regs *regs)
: [sp] "r" (sp), [regs] "r" (regs)
: "a0", "a1", "a2", "a3", "a4", "a5", "a6", "a7",
"t0", "t1", "t2", "t3", "t4", "t5", "t6",
#ifndef CONFIG_FRAME_POINTER
"s0",
#endif
"memory");
} else
#endif