478fcb2cdb
This patch adds ptrace, debug monitors and hardware breakpoints support. Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Acked-by: Tony Lindgren <tony@atomide.com> Acked-by: Nicolas Pitre <nico@linaro.org> Acked-by: Olof Johansson <olof@lixom.net> Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com> Acked-by: Arnd Bergmann <arnd@arndb.de>
88 lines
2.3 KiB
C
88 lines
2.3 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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#endif /* __ASSEMBLY */
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#endif /* __KERNEL__ */
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#endif /* __ASM_DEBUG_MONITORS_H */
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