diff options
| author | Mark Rutland <mark.rutland@arm.com> | 2021-06-07 10:46:20 +0100 |
|---|---|---|
| committer | Will Deacon <will@kernel.org> | 2021-06-07 11:35:56 +0100 |
| commit | 8168f098867f6584295ea408c683f61e945c6ff1 (patch) | |
| tree | 5f39f2af949795d16569adfc0a6b88762369c9c9 /arch/arm64/kernel/traps.c | |
| parent | afd05e28c9115d01f01d934962634789d069d3fe (diff) | |
arm64: entry: split bad stack entry
We'd like to keep all the entry sequencing in entry-common.c, as this
will allow us to ensure this is consistent, and free from any unsound
instrumentation.
Currently handle_bad_stack() performs the NMI entry sequence in traps.c.
Let's split the low-level entry sequence from the reporting, moving the
former to entry-common.c and keeping the latter in traps.c. To make it
clear that reporting function never returns, it is renamed to
panic_bad_stack().
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Joey Gouly <joey.gouly@arm.com>
Cc: James Morse <james.morse@arm.com>
Cc: Will Deacon <will@kernel.org>
Link: https://lore.kernel.org/r/20210607094624.34689-17-mark.rutland@arm.com
Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to 'arch/arm64/kernel/traps.c')
| -rw-r--r-- | arch/arm64/kernel/traps.c | 6 |
1 files changed, 1 insertions, 5 deletions
diff --git a/arch/arm64/kernel/traps.c b/arch/arm64/kernel/traps.c index 47d423f7ac81..af941996eb5f 100644 --- a/arch/arm64/kernel/traps.c +++ b/arch/arm64/kernel/traps.c @@ -763,15 +763,11 @@ void bad_el0_sync(struct pt_regs *regs, int reason, unsigned int esr) DEFINE_PER_CPU(unsigned long [OVERFLOW_STACK_SIZE/sizeof(long)], overflow_stack) __aligned(16); -asmlinkage void noinstr handle_bad_stack(struct pt_regs *regs) +void panic_bad_stack(struct pt_regs *regs, unsigned int esr, unsigned long far) { unsigned long tsk_stk = (unsigned long)current->stack; unsigned long irq_stk = (unsigned long)this_cpu_read(irq_stack_ptr); unsigned long ovf_stk = (unsigned long)this_cpu_ptr(overflow_stack); - unsigned int esr = read_sysreg(esr_el1); - unsigned long far = read_sysreg(far_el1); - - arm64_enter_nmi(regs); console_verbose(); pr_emerg("Insufficient stack space to handle exception!"); |