1*478fcb2cSWill Deacon /* 2*478fcb2cSWill Deacon * Copyright (C) 2012 ARM Ltd. 3*478fcb2cSWill Deacon * 4*478fcb2cSWill Deacon * This program is free software; you can redistribute it and/or modify 5*478fcb2cSWill Deacon * it under the terms of the GNU General Public License version 2 as 6*478fcb2cSWill Deacon * published by the Free Software Foundation. 7*478fcb2cSWill Deacon * 8*478fcb2cSWill Deacon * This program is distributed in the hope that it will be useful, 9*478fcb2cSWill Deacon * but WITHOUT ANY WARRANTY; without even the implied warranty of 10*478fcb2cSWill Deacon * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 11*478fcb2cSWill Deacon * GNU General Public License for more details. 12*478fcb2cSWill Deacon * 13*478fcb2cSWill Deacon * You should have received a copy of the GNU General Public License 14*478fcb2cSWill Deacon * along with this program. If not, see <http://www.gnu.org/licenses/>. 15*478fcb2cSWill Deacon */ 16*478fcb2cSWill Deacon #ifndef __ASM_DEBUG_MONITORS_H 17*478fcb2cSWill Deacon #define __ASM_DEBUG_MONITORS_H 18*478fcb2cSWill Deacon 19*478fcb2cSWill Deacon #ifdef __KERNEL__ 20*478fcb2cSWill Deacon 21*478fcb2cSWill Deacon #define DBG_ESR_EVT(x) (((x) >> 27) & 0x7) 22*478fcb2cSWill Deacon 23*478fcb2cSWill Deacon /* AArch64 */ 24*478fcb2cSWill Deacon #define DBG_ESR_EVT_HWBP 0x0 25*478fcb2cSWill Deacon #define DBG_ESR_EVT_HWSS 0x1 26*478fcb2cSWill Deacon #define DBG_ESR_EVT_HWWP 0x2 27*478fcb2cSWill Deacon #define DBG_ESR_EVT_BRK 0x6 28*478fcb2cSWill Deacon 29*478fcb2cSWill Deacon enum debug_el { 30*478fcb2cSWill Deacon DBG_ACTIVE_EL0 = 0, 31*478fcb2cSWill Deacon DBG_ACTIVE_EL1, 32*478fcb2cSWill Deacon }; 33*478fcb2cSWill Deacon 34*478fcb2cSWill Deacon /* AArch32 */ 35*478fcb2cSWill Deacon #define DBG_ESR_EVT_BKPT 0x4 36*478fcb2cSWill Deacon #define DBG_ESR_EVT_VECC 0x5 37*478fcb2cSWill Deacon 38*478fcb2cSWill Deacon #define AARCH32_BREAK_ARM 0x07f001f0 39*478fcb2cSWill Deacon #define AARCH32_BREAK_THUMB 0xde01 40*478fcb2cSWill Deacon #define AARCH32_BREAK_THUMB2_LO 0xf7f0 41*478fcb2cSWill Deacon #define AARCH32_BREAK_THUMB2_HI 0xa000 42*478fcb2cSWill Deacon 43*478fcb2cSWill Deacon #ifndef __ASSEMBLY__ 44*478fcb2cSWill Deacon struct task_struct; 45*478fcb2cSWill Deacon 46*478fcb2cSWill Deacon #define local_dbg_save(flags) \ 47*478fcb2cSWill Deacon do { \ 48*478fcb2cSWill Deacon typecheck(unsigned long, flags); \ 49*478fcb2cSWill Deacon asm volatile( \ 50*478fcb2cSWill Deacon "mrs %0, daif // local_dbg_save\n" \ 51*478fcb2cSWill Deacon "msr daifset, #8" \ 52*478fcb2cSWill Deacon : "=r" (flags) : : "memory"); \ 53*478fcb2cSWill Deacon } while (0) 54*478fcb2cSWill Deacon 55*478fcb2cSWill Deacon #define local_dbg_restore(flags) \ 56*478fcb2cSWill Deacon do { \ 57*478fcb2cSWill Deacon typecheck(unsigned long, flags); \ 58*478fcb2cSWill Deacon asm volatile( \ 59*478fcb2cSWill Deacon "msr daif, %0 // local_dbg_restore\n" \ 60*478fcb2cSWill Deacon : : "r" (flags) : "memory"); \ 61*478fcb2cSWill Deacon } while (0) 62*478fcb2cSWill Deacon 63*478fcb2cSWill Deacon #define DBG_ARCH_ID_RESERVED 0 /* In case of ptrace ABI updates. */ 64*478fcb2cSWill Deacon 65*478fcb2cSWill Deacon u8 debug_monitors_arch(void); 66*478fcb2cSWill Deacon 67*478fcb2cSWill Deacon void enable_debug_monitors(enum debug_el el); 68*478fcb2cSWill Deacon void disable_debug_monitors(enum debug_el el); 69*478fcb2cSWill Deacon 70*478fcb2cSWill Deacon void user_rewind_single_step(struct task_struct *task); 71*478fcb2cSWill Deacon void user_fastforward_single_step(struct task_struct *task); 72*478fcb2cSWill Deacon 73*478fcb2cSWill Deacon void kernel_enable_single_step(struct pt_regs *regs); 74*478fcb2cSWill Deacon void kernel_disable_single_step(void); 75*478fcb2cSWill Deacon int kernel_active_single_step(void); 76*478fcb2cSWill Deacon 77*478fcb2cSWill Deacon #ifdef CONFIG_HAVE_HW_BREAKPOINT 78*478fcb2cSWill Deacon int reinstall_suspended_bps(struct pt_regs *regs); 79*478fcb2cSWill Deacon #else 80*478fcb2cSWill Deacon static inline int reinstall_suspended_bps(struct pt_regs *regs) 81*478fcb2cSWill Deacon { 82*478fcb2cSWill Deacon return -ENODEV; 83*478fcb2cSWill Deacon } 84*478fcb2cSWill Deacon #endif 85*478fcb2cSWill Deacon 86*478fcb2cSWill Deacon #endif /* __ASSEMBLY */ 87*478fcb2cSWill Deacon #endif /* __KERNEL__ */ 88*478fcb2cSWill Deacon #endif /* __ASM_DEBUG_MONITORS_H */ 89