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https://github.com/torvalds/linux
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8a1ccfbc9e
In preparation for enabling the stackleak plugin on arm64, we need a way to get the bounds of the current stack. Extend on_accessible_stack to get this information. Acked-by: Alexander Popov <alex.popov@linux.com> Reviewed-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Laura Abbott <labbott@redhat.com> [will: folded in fix for allmodconfig build breakage w/ sdei] Signed-off-by: Will Deacon <will.deacon@arm.com>
61 lines
1.5 KiB
C
61 lines
1.5 KiB
C
// SPDX-License-Identifier: GPL-2.0
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// Copyright (C) 2017 Arm Ltd.
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#ifndef __ASM_SDEI_H
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#define __ASM_SDEI_H
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/* Values for sdei_exit_mode */
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#define SDEI_EXIT_HVC 0
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#define SDEI_EXIT_SMC 1
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#define SDEI_STACK_SIZE IRQ_STACK_SIZE
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#ifndef __ASSEMBLY__
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#include <linux/linkage.h>
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#include <linux/preempt.h>
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#include <linux/types.h>
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#include <asm/virt.h>
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extern unsigned long sdei_exit_mode;
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/* Software Delegated Exception entry point from firmware*/
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asmlinkage void __sdei_asm_handler(unsigned long event_num, unsigned long arg,
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unsigned long pc, unsigned long pstate);
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/* and its CONFIG_UNMAP_KERNEL_AT_EL0 trampoline */
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asmlinkage void __sdei_asm_entry_trampoline(unsigned long event_num,
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unsigned long arg,
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unsigned long pc,
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unsigned long pstate);
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/*
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* The above entry point does the minimum to call C code. This function does
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* anything else, before calling the driver.
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*/
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struct sdei_registered_event;
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asmlinkage unsigned long __sdei_handler(struct pt_regs *regs,
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struct sdei_registered_event *arg);
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unsigned long sdei_arch_get_entry_point(int conduit);
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#define sdei_arch_get_entry_point(x) sdei_arch_get_entry_point(x)
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struct stack_info;
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bool _on_sdei_stack(unsigned long sp, struct stack_info *info);
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static inline bool on_sdei_stack(unsigned long sp,
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struct stack_info *info)
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{
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if (!IS_ENABLED(CONFIG_VMAP_STACK))
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return false;
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if (!IS_ENABLED(CONFIG_ARM_SDE_INTERFACE))
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return false;
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if (in_nmi())
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return _on_sdei_stack(sp, info);
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return false;
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}
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#endif /* __ASSEMBLY__ */
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#endif /* __ASM_SDEI_H */
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