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134 lines
3.5 KiB
134 lines
3.5 KiB
/* SPDX-License-Identifier: GPL-2.0-only */ |
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/* |
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* Copyright (C) 2012 ARM Ltd. |
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*/ |
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#ifndef __ASM_DEBUG_MONITORS_H |
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#define __ASM_DEBUG_MONITORS_H |
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#include <linux/errno.h> |
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#include <linux/types.h> |
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#include <asm/brk-imm.h> |
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#include <asm/esr.h> |
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#include <asm/insn.h> |
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#include <asm/ptrace.h> |
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/* Low-level stepping controls. */ |
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#define DBG_MDSCR_SS (1 << 0) |
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#define DBG_SPSR_SS (1 << 21) |
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/* MDSCR_EL1 enabling bits */ |
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#define DBG_MDSCR_KDE (1 << 13) |
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#define DBG_MDSCR_MDE (1 << 15) |
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#define DBG_MDSCR_MASK ~(DBG_MDSCR_KDE | DBG_MDSCR_MDE) |
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#define DBG_ESR_EVT(x) (((x) >> 27) & 0x7) |
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/* AArch64 */ |
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#define DBG_ESR_EVT_HWBP 0x0 |
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#define DBG_ESR_EVT_HWSS 0x1 |
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#define DBG_ESR_EVT_HWWP 0x2 |
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#define DBG_ESR_EVT_BRK 0x6 |
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/* |
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* Break point instruction encoding |
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*/ |
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#define BREAK_INSTR_SIZE AARCH64_INSN_SIZE |
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/* |
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* BRK instruction encoding |
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* The #imm16 value should be placed at bits[20:5] within BRK ins |
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*/ |
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#define AARCH64_BREAK_MON 0xd4200000 |
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/* |
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* BRK instruction for provoking a fault on purpose |
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* Unlike kgdb, #imm16 value with unallocated handler is used for faulting. |
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*/ |
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#define AARCH64_BREAK_FAULT (AARCH64_BREAK_MON | (FAULT_BRK_IMM << 5)) |
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#define AARCH64_BREAK_KGDB_DYN_DBG \ |
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(AARCH64_BREAK_MON | (KGDB_DYN_DBG_BRK_IMM << 5)) |
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#define CACHE_FLUSH_IS_SAFE 1 |
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/* kprobes BRK opcodes with ESR encoding */ |
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#define BRK64_OPCODE_KPROBES (AARCH64_BREAK_MON | (KPROBES_BRK_IMM << 5)) |
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#define BRK64_OPCODE_KPROBES_SS (AARCH64_BREAK_MON | (KPROBES_BRK_SS_IMM << 5)) |
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/* uprobes BRK opcodes with ESR encoding */ |
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#define BRK64_OPCODE_UPROBES (AARCH64_BREAK_MON | (UPROBES_BRK_IMM << 5)) |
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/* AArch32 */ |
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#define DBG_ESR_EVT_BKPT 0x4 |
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#define DBG_ESR_EVT_VECC 0x5 |
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#define AARCH32_BREAK_ARM 0x07f001f0 |
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#define AARCH32_BREAK_THUMB 0xde01 |
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#define AARCH32_BREAK_THUMB2_LO 0xf7f0 |
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#define AARCH32_BREAK_THUMB2_HI 0xa000 |
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#ifndef __ASSEMBLY__ |
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struct task_struct; |
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#define DBG_ARCH_ID_RESERVED 0 /* In case of ptrace ABI updates. */ |
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#define DBG_HOOK_HANDLED 0 |
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#define DBG_HOOK_ERROR 1 |
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struct step_hook { |
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struct list_head node; |
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int (*fn)(struct pt_regs *regs, unsigned int esr); |
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}; |
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void register_user_step_hook(struct step_hook *hook); |
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void unregister_user_step_hook(struct step_hook *hook); |
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void register_kernel_step_hook(struct step_hook *hook); |
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void unregister_kernel_step_hook(struct step_hook *hook); |
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struct break_hook { |
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struct list_head node; |
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int (*fn)(struct pt_regs *regs, unsigned int esr); |
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u16 imm; |
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u16 mask; /* These bits are ignored when comparing with imm */ |
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}; |
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void register_user_break_hook(struct break_hook *hook); |
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void unregister_user_break_hook(struct break_hook *hook); |
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void register_kernel_break_hook(struct break_hook *hook); |
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void unregister_kernel_break_hook(struct break_hook *hook); |
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u8 debug_monitors_arch(void); |
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enum dbg_active_el { |
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DBG_ACTIVE_EL0 = 0, |
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DBG_ACTIVE_EL1, |
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}; |
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void enable_debug_monitors(enum dbg_active_el el); |
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void disable_debug_monitors(enum dbg_active_el el); |
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void user_rewind_single_step(struct task_struct *task); |
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void user_fastforward_single_step(struct task_struct *task); |
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void user_regs_reset_single_step(struct user_pt_regs *regs, |
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struct task_struct *task); |
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void kernel_enable_single_step(struct pt_regs *regs); |
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void kernel_disable_single_step(void); |
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int kernel_active_single_step(void); |
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#ifdef CONFIG_HAVE_HW_BREAKPOINT |
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int reinstall_suspended_bps(struct pt_regs *regs); |
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#else |
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static inline int reinstall_suspended_bps(struct pt_regs *regs) |
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{ |
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return -ENODEV; |
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} |
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#endif |
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int aarch32_break_handler(struct pt_regs *regs); |
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void debug_traps_init(void); |
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#endif /* __ASSEMBLY */ |
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#endif /* __ASM_DEBUG_MONITORS_H */
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