1442b6ed24
The software breakpoint handlers are hooked in directly from ptrace, which makes it difficult to add additional handlers for things like kprobes and kgdb. This patch moves the handling code into debug-monitors.c, where we can dispatch to different debug subsystems more easily. Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
98 lines
2.5 KiB
C
98 lines
2.5 KiB
C
/*
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* Copyright (C) 2012 ARM Ltd.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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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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#ifdef __KERNEL__
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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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enum debug_el {
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DBG_ACTIVE_EL0 = 0,
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DBG_ACTIVE_EL1,
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};
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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 local_dbg_save(flags) \
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do { \
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typecheck(unsigned long, flags); \
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asm volatile( \
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"mrs %0, daif // local_dbg_save\n" \
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"msr daifset, #8" \
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: "=r" (flags) : : "memory"); \
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} while (0)
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#define local_dbg_restore(flags) \
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do { \
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typecheck(unsigned long, flags); \
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asm volatile( \
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"msr daif, %0 // local_dbg_restore\n" \
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: : "r" (flags) : "memory"); \
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} while (0)
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#define DBG_ARCH_ID_RESERVED 0 /* In case of ptrace ABI updates. */
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u8 debug_monitors_arch(void);
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void enable_debug_monitors(enum debug_el el);
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void disable_debug_monitors(enum debug_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 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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#ifdef CONFIG_COMPAT
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int aarch32_break_handler(struct pt_regs *regs);
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#else
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static int aarch32_break_handler(struct pt_regs *regs)
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{
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return -EFAULT;
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}
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#endif
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#endif /* __ASSEMBLY */
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#endif /* __KERNEL__ */
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#endif /* __ASM_DEBUG_MONITORS_H */
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