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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
commit | ace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch) | |
tree | b2d64bc10158fdd5497876388cd68142ca374ed3 /arch/arm64/include/asm/debug-monitors.h | |
parent | Initial commit. (diff) | |
download | linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip |
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/arm64/include/asm/debug-monitors.h')
-rw-r--r-- | arch/arm64/include/asm/debug-monitors.h | 123 |
1 files changed, 123 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/debug-monitors.h b/arch/arm64/include/asm/debug-monitors.h new file mode 100644 index 0000000000..13d437bcbf --- /dev/null +++ b/arch/arm64/include/asm/debug-monitors.h @@ -0,0 +1,123 @@ +/* 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 */ |