linux-stable/arch/x86/include/asm/traps.h
Thomas Gleixner c29c775a55 x86/entry: Convert double fault exception to IDTENTRY_DF
Convert #DF to IDTENTRY_DF
  - Implement the C entry point with DEFINE_IDTENTRY_DF
  - Emit the ASM stub with DECLARE_IDTENTRY_DF on 64bit
  - Remove the ASM idtentry in 64bit
  - Adjust the 32bit shim code
  - Fixup the XEN/PV code
  - Remove the old prototypes

No functional change.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Alexandre Chartre <alexandre.chartre@oracle.com>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Acked-by: Andy Lutomirski <luto@kernel.org>
Link: https://lkml.kernel.org/r/20200505135315.583415264@linutronix.de
2020-06-11 15:15:03 +02:00

83 lines
2.3 KiB
C

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_X86_TRAPS_H
#define _ASM_X86_TRAPS_H
#include <linux/context_tracking_state.h>
#include <linux/kprobes.h>
#include <asm/debugreg.h>
#include <asm/idtentry.h>
#include <asm/siginfo.h> /* TRAP_TRACE, ... */
#define dotraplinkage __visible
asmlinkage void page_fault(void);
asmlinkage void async_page_fault(void);
#if defined(CONFIG_X86_64) && defined(CONFIG_XEN_PV)
asmlinkage void xen_page_fault(void);
#endif
dotraplinkage void do_page_fault(struct pt_regs *regs, unsigned long error_code, unsigned long address);
#ifdef CONFIG_X86_64
asmlinkage __visible notrace struct pt_regs *sync_regs(struct pt_regs *eregs);
asmlinkage __visible notrace
struct bad_iret_stack *fixup_bad_iret(struct bad_iret_stack *s);
void __init trap_init(void);
#endif
#ifdef CONFIG_X86_F00F_BUG
/* For handling the FOOF bug */
void handle_invalid_op(struct pt_regs *regs);
#endif
static inline int get_si_code(unsigned long condition)
{
if (condition & DR_STEP)
return TRAP_TRACE;
else if (condition & (DR_TRAP0|DR_TRAP1|DR_TRAP2|DR_TRAP3))
return TRAP_HWBKPT;
else
return TRAP_BRKPT;
}
extern int panic_on_unrecovered_nmi;
void math_emulate(struct math_emu_info *);
#ifndef CONFIG_X86_32
asmlinkage void smp_thermal_interrupt(struct pt_regs *regs);
asmlinkage void smp_threshold_interrupt(struct pt_regs *regs);
asmlinkage void smp_deferred_error_interrupt(struct pt_regs *regs);
#endif
void smp_apic_timer_interrupt(struct pt_regs *regs);
void smp_spurious_interrupt(struct pt_regs *regs);
void smp_error_interrupt(struct pt_regs *regs);
asmlinkage void smp_irq_move_cleanup_interrupt(void);
#ifdef CONFIG_VMAP_STACK
void __noreturn handle_stack_overflow(const char *message,
struct pt_regs *regs,
unsigned long fault_address);
#endif
/*
* Page fault error code bits:
*
* bit 0 == 0: no page found 1: protection fault
* bit 1 == 0: read access 1: write access
* bit 2 == 0: kernel-mode access 1: user-mode access
* bit 3 == 1: use of reserved bit detected
* bit 4 == 1: fault was an instruction fetch
* bit 5 == 1: protection keys block access
*/
enum x86_pf_error_code {
X86_PF_PROT = 1 << 0,
X86_PF_WRITE = 1 << 1,
X86_PF_USER = 1 << 2,
X86_PF_RSVD = 1 << 3,
X86_PF_INSTR = 1 << 4,
X86_PF_PK = 1 << 5,
};
#endif /* _ASM_X86_TRAPS_H */