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/*
* Copyright (C) 2012 ARM Ltd.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef __ASM_DEBUG_MONITORS_H
#define __ASM_DEBUG_MONITORS_H
#ifdef __KERNEL__
#define DBG_ESR_EVT(x) (((x) >> 27) & 0x7)
/* AArch64 */
#define DBG_ESR_EVT_HWBP 0x0
#define DBG_ESR_EVT_HWSS 0x1
#define DBG_ESR_EVT_HWWP 0x2
#define DBG_ESR_EVT_BRK 0x6
enum debug_el {
DBG_ACTIVE_EL0 = 0,
DBG_ACTIVE_EL1,
};
/* AArch32 */
#define DBG_ESR_EVT_BKPT 0x4
#define DBG_ESR_EVT_VECC 0x5
#define AARCH32_BREAK_ARM 0x07f001f0
#define AARCH32_BREAK_THUMB 0xde01
#define AARCH32_BREAK_THUMB2_LO 0xf7f0
#define AARCH32_BREAK_THUMB2_HI 0xa000
#ifndef __ASSEMBLY__
struct task_struct;
#define local_dbg_save(flags) \
do { \
typecheck(unsigned long, flags); \
asm volatile( \
"mrs %0, daif // local_dbg_save\n" \
"msr daifset, #8" \
: "=r" (flags) : : "memory"); \
} while (0)
#define local_dbg_restore(flags) \
do { \
typecheck(unsigned long, flags); \
asm volatile( \
"msr daif, %0 // local_dbg_restore\n" \
: : "r" (flags) : "memory"); \
} while (0)
#define DBG_ARCH_ID_RESERVED 0 /* In case of ptrace ABI updates. */
u8 debug_monitors_arch(void);
void enable_debug_monitors(enum debug_el el);
void disable_debug_monitors(enum debug_el el);
void user_rewind_single_step(struct task_struct *task);
void user_fastforward_single_step(struct task_struct *task);
void kernel_enable_single_step(struct pt_regs *regs);
void kernel_disable_single_step(void);
int kernel_active_single_step(void);
#ifdef CONFIG_HAVE_HW_BREAKPOINT
int reinstall_suspended_bps(struct pt_regs *regs);
#else
static inline int reinstall_suspended_bps(struct pt_regs *regs)
{
return -ENODEV;
}
#endif
int aarch32_break_handler(struct pt_regs *regs);
#endif /* __ASSEMBLY */
#endif /* __KERNEL__ */
#endif /* __ASM_DEBUG_MONITORS_H */