1 /* 2 * This file is part of ltrace. 3 * Copyright (C) 2013 Petr Machata, Red Hat Inc. 4 * 5 * This program is free software; you can redistribute it and/or 6 * modify it under the terms of the GNU General Public License as 7 * published by the Free Software Foundation; either version 2 of the 8 * License, or (at your option) any later version. 9 * 10 * This program is distributed in the hope that it will be useful, but 11 * WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 13 * General Public License for more details. 14 * 15 * You should have received a copy of the GNU General Public License 16 * along with this program; if not, write to the Free Software 17 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 18 * 02110-1301 USA 19 */ 20 21 #define SUBMASK(x) ((1L << ((x) + 1)) - 1) 22 #define BIT(obj,st) (((obj) >> (st)) & 1) 23 #define BITS(obj,st,fn) (((obj) >> (st)) & SUBMASK((fn) - (st))) 24 #define SBITS(obj,st,fn) \ 25 ((long) (BITS(obj,st,fn) | ((long) BIT(obj,fn) * ~ SUBMASK(fn - st)))) 26 27 enum arm_register { 28 ARM_REG_R7 = 7, 29 ARM_REG_IP = 12, 30 ARM_REG_SP = 13, 31 ARM_REG_LR = 14, 32 ARM_REG_PC = 15, 33 ARM_REG_CPSR = 16, 34 }; 35 36 /* Write value of register REG to *LP. Return 0 on success or a 37 * negative value on failure. */ 38 int arm_get_register(struct process *proc, enum arm_register reg, uint32_t *lp); 39 40 /* Same as above, but if REG==ARM_REG_PC, it returns the value +8. */ 41 int arm_get_register_offpc(struct process *proc, enum arm_register reg, 42 uint32_t *lp); 43 44 /* Same as arm_get_register, but shift is performed depending on 45 * instruction INST. */ 46 int arm_get_shifted_register(struct process *proc, uint32_t inst, int carry, 47 arch_addr_t pc, uint32_t *lp); 48