name : debug-monitors.h /* SPDX-License-Identifier: GPL-2.0-only */ /* * Copyright (C) 2012 ARM Ltd. */ #ifndef __ASM_DEBUG_MONITORS_H #define __ASM_DEBUG_MONITORS_H #include <linux/errno.h> #include <linux/types.h> #include <asm/brk-imm.h> #include <asm/esr.h> #include <asm/insn.h> #include <asm/ptrace.h> /* Low-level stepping controls. */ #define DBG_MDSCR_SS (1 << 0) #define DBG_SPSR_SS (1 << 21) /* MDSCR_EL1 enabling bits */ #define DBG_MDSCR_KDE (1 << 13) #define DBG_MDSCR_MDE (1 << 15) #define DBG_MDSCR_MASK ~(DBG_MDSCR_KDE | DBG_MDSCR_MDE) #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 /* * Break point instruction encoding */ #define BREAK_INSTR_SIZE AARCH64_INSN_SIZE #define AARCH64_BREAK_KGDB_DYN_DBG \ (AARCH64_BREAK_MON | (KGDB_DYN_DBG_BRK_IMM << 5)) #define CACHE_FLUSH_IS_SAFE 1 /* kprobes BRK opcodes with ESR encoding */ #define BRK64_OPCODE_KPROBES (AARCH64_BREAK_MON | (KPROBES_BRK_IMM << 5)) #define BRK64_OPCODE_KPROBES_SS (AARCH64_BREAK_MON | (KPROBES_BRK_SS_IMM << 5)) /* uprobes BRK opcodes with ESR encoding */ #define BRK64_OPCODE_UPROBES (AARCH64_BREAK_MON | (UPROBES_BRK_IMM << 5)) /* 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 DBG_ARCH_ID_RESERVED 0 /* In case of ptrace ABI updates. */ #define DBG_HOOK_HANDLED 0 #define DBG_HOOK_ERROR 1 struct step_hook { struct list_head node; int (*fn)(struct pt_regs *regs, unsigned long esr); }; void register_user_step_hook(struct step_hook *hook); void unregister_user_step_hook(struct step_hook *hook); void register_kernel_step_hook(struct step_hook *hook); void unregister_kernel_step_hook(struct step_hook *hook); struct break_hook { struct list_head node; int (*fn)(struct pt_regs *regs, unsigned long esr); u16 imm; u16 mask; /* These bits are ignored when comparing with imm */ }; void register_user_break_hook(struct break_hook *hook); void unregister_user_break_hook(struct break_hook *hook); void register_kernel_break_hook(struct break_hook *hook); void unregister_kernel_break_hook(struct break_hook *hook); u8 debug_monitors_arch(void); enum dbg_active_el { DBG_ACTIVE_EL0 = 0, DBG_ACTIVE_EL1, }; void enable_debug_monitors(enum dbg_active_el el); void disable_debug_monitors(enum dbg_active_el el); void user_rewind_single_step(struct task_struct *task); void user_fastforward_single_step(struct task_struct *task); void user_regs_reset_single_step(struct user_pt_regs *regs, 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); void kernel_rewind_single_step(struct pt_regs *regs); #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); void debug_traps_init(void); #endif /* __ASSEMBLY */ #endif /* __ASM_DEBUG_MONITORS_H */