@@ -72,9 +72,16 @@ struct op_src {
int offset;
};
+struct op_extra {
+ unsigned char used;
+ unsigned char reg;
+ int offset;
+};
+
struct stack_op {
struct op_dest dest;
struct op_src src;
+ struct op_extra extra;
};
struct instruction;
new file mode 100644
@@ -0,0 +1,7 @@
+objtool-y += decode.o
+objtool-y += orc_dump.o
+objtool-y += orc_gen.o
+objtool-y += bit_operations.o
+
+
+CFLAGS_decode.o += -I$(OUTPUT)arch/arm64/lib
new file mode 100644
@@ -0,0 +1,67 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include "bit_operations.h"
+
+#include "../../warn.h"
+
+u64 replicate(u64 x, int size, int n)
+{
+ u64 ret = 0;
+
+ while (n >= 0) {
+ ret = (ret | x) << size;
+ n--;
+ }
+ return ret | x;
+}
+
+u64 ror(u64 x, int size, int shift)
+{
+ int m = shift % size;
+
+ if (shift == 0)
+ return x;
+ return ZERO_EXTEND((x >> m) | (x << (size - m)), size);
+}
+
+int highest_set_bit(u32 x)
+{
+ int i;
+
+ for (i = 31; i >= 0; i--, x <<= 1)
+ if (x & 0x80000000)
+ return i;
+ return 0;
+}
+
+/* imms and immr are both 6 bit long */
+__uint128_t decode_bit_masks(unsigned char N, unsigned char imms,
+ unsigned char immr, bool immediate)
+{
+ u64 tmask, wmask;
+ u32 diff, S, R, esize, welem, telem;
+ unsigned char levels = 0, len = 0;
+
+ len = highest_set_bit((N << 6) | ((~imms) & ONES(6)));
+ levels = ZERO_EXTEND(ONES(len), 6);
+
+ if (immediate && ((imms & levels) == levels)) {
+ WARN("unknown instruction");
+ return -1;
+ }
+
+ S = imms & levels;
+ R = immr & levels;
+ diff = ZERO_EXTEND(S - R, 6);
+
+ esize = 1 << len;
+ diff = diff & ONES(len);
+
+ welem = ZERO_EXTEND(ONES(S + 1), esize);
+ telem = ZERO_EXTEND(ONES(diff + 1), esize);
+
+ wmask = replicate(ror(welem, esize, R), esize, 64 / esize);
+ tmask = replicate(telem, esize, 64 / esize);
+
+ return ((__uint128_t)wmask << 64) | tmask;
+}
new file mode 100644
@@ -0,0 +1,2778 @@
+/*
+ * Copyright (C) 2019 Raphael Gault <raphael.gault@arm.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+
+#include "insn_decode.h"
+#include "cfi.h"
+#include "bit_operations.h"
+
+#include "../../check.h"
+#include "../../arch.h"
+#include "../../elf.h"
+#include "../../warn.h"
+
+/*
+ * static int (*arm_decode_class)(u32 instr,
+ * unsigned int *len,
+ * unsigned char *type,
+ * unsigned long *immediate,
+ * struct stack_op *op);
+ */
+static arm_decode_class aarch64_insn_class_decode_table[] = {
+ [INSN_RESERVED] = arm_decode_reserved,
+ [INSN_UNKNOWN] = arm_decode_unknown,
+ [INSN_SVE_ENC] = arm_decode_sve_encoding,
+ [INSN_UNALLOC] = arm_decode_unknown,
+ [INSN_LD_ST_4] = arm_decode_ld_st,
+ [INSN_DP_REG_5] = arm_decode_dp_reg,
+ [INSN_LD_ST_6] = arm_decode_ld_st,
+ [INSN_DP_SIMD_7] = arm_decode_dp_simd,
+ [0b1000 ... INSN_DP_IMM] = arm_decode_dp_imm,
+ [0b1010 ... INSN_BRANCH] = arm_decode_br_sys,
+ [INSN_LD_ST_C] = arm_decode_ld_st,
+ [INSN_DP_REG_D] = arm_decode_dp_reg,
+ [INSN_LD_ST_E] = arm_decode_ld_st,
+ [INSN_DP_SIMD_F] = arm_decode_dp_simd,
+};
+
+static arm_decode_class aarch64_insn_dp_imm_decode_table[] = {
+ [0 ... INSN_PCREL] = arm_decode_pcrel,
+ [INSN_ADD_SUB] = arm_decode_add_sub,
+ [INSN_ADD_TAG] = arm_decode_add_sub_tags,
+ [INSN_LOGICAL] = arm_decode_logical,
+ [INSN_MOVE_WIDE] = arm_decode_move_wide,
+ [INSN_BITFIELD] = arm_decode_bitfield,
+ [INSN_EXTRACT] = arm_decode_extract,
+};
+
+bool arch_callee_saved_reg(unsigned char reg)
+{
+ switch (reg) {
+ case CFI_R19:
+ case CFI_R20:
+ case CFI_R21:
+ case CFI_R22:
+ case CFI_R23:
+ case CFI_R24:
+ case CFI_R25:
+ case CFI_R26:
+ case CFI_R27:
+ case CFI_R28:
+ case CFI_FP:
+ case CFI_R30:
+ return true;
+ default:
+ return false;
+ }
+}
+
+void arch_initial_func_cfi_state(struct cfi_state *state)
+{
+ int i;
+
+ for (i = 0; i < CFI_NUM_REGS; i++) {
+ state->regs[i].base = CFI_UNDEFINED;
+ state->regs[i].offset = 0;
+ }
+
+ /* initial CFA (call frame address) */
+ state->cfa.base = CFI_CFA;
+ state->cfa.offset = 0;
+
+ /* initial RA (return address) */
+ state->regs[CFI_LR].base = CFI_CFA;
+ state->regs[CFI_LR].offset = -8;
+}
+
+unsigned long arch_dest_rela_offset(int addend)
+{
+ return addend;
+}
+
+static int is_arm64(struct elf *elf)
+{
+ switch (elf->ehdr.e_machine) {
+ case EM_AARCH64: //0xB7
+ return 1;
+ default:
+ WARN("unexpected ELF machine type %x",
+ elf->ehdr.e_machine);
+ return 0;
+ }
+}
+
+/*
+ * Arm A64 Instruction set' decode groups (based on op0 bits[28:25]):
+ * Ob0000 - Reserved
+ * 0b0001/0b001x - Unallocated
+ * 0b100x - Data Processing -- Immediate
+ * 0b101x - Branch, Exception Gen., System Instructions.
+ * 0bx1x0 - Loads and Stores
+ * 0bx101 - Data Processing -- Registers
+ * 0bx111 - Data Processing -- Scalar Floating-Points, Advanced SIMD
+ */
+
+int arch_decode_instruction(struct elf *elf, struct section *sec,
+ unsigned long offset, unsigned int maxlen,
+ unsigned int *len, unsigned char *type,
+ unsigned long *immediate, struct stack_op *op)
+{
+ int arm64 = 0;
+ u32 insn = 0;
+
+ *len = 4;
+ *immediate = 0;
+
+ op->dest.type = 0;
+ op->dest.reg = 0;
+ op->dest.offset = 0;
+ op->src.type = 0;
+ op->src.reg = 0;
+ op->src.offset = 0;
+
+ //test architucture (make sure it is arm64)
+ arm64 = is_arm64(elf);
+ if (arm64 != 1)
+ return -1;
+
+ //retrieve instruction (from sec->data->offset)
+ insn = *(u32 *)(sec->data->d_buf + offset);
+
+ //dispatch according to encoding classes
+ return aarch64_insn_class_decode_table[(insn >> 25) & 0xf](insn, type,
+ immediate, op);
+}
+
+int arm_decode_unknown(u32 instr, unsigned char *type,
+ unsigned long *immediate, struct stack_op *op)
+{
+ *type = 0;
+ return 0;
+}
+
+int arm_decode_dp_simd(u32 instr, unsigned char *type,
+ unsigned long *immediate, struct stack_op *op)
+{
+ *type = INSN_OTHER;
+ return 0;
+}
+
+int arm_decode_reserved(u32 instr, unsigned char *type,
+ unsigned long *immediate, struct stack_op *op)
+{
+ *immediate = instr & ONES(16);
+ *type = INSN_BUG;
+ return 0;
+}
+
+int arm_decode_dp_imm(u32 instr, unsigned char *type,
+ unsigned long *immediate, struct stack_op *op)
+{
+ return aarch64_insn_dp_imm_decode_table[(instr >> 23) & 0x7](instr,
+ type, immediate, op);
+}
+
+int arm_decode_pcrel(u32 instr, unsigned char *type,
+ unsigned long *immediate, struct stack_op *op)
+{
+ unsigned char rd = 0, page = 0;
+ u32 immhi = 0, immlo = 0;
+
+ page = EXTRACT_BIT(instr, 31);
+ rd = instr & 0x1F;
+ immhi = (instr >> 5) & ONES(19);
+ immlo = (instr >> 29) & ONES(2);
+
+ *immediate = SIGN_EXTEND((immhi << 2) | immlo, 21);
+
+ if (page)
+ *immediate = SIGN_EXTEND(*immediate << 12, 33);
+
+ *type = INSN_OTHER;
+ op->src.reg = ADR_SOURCE;
+ op->dest.reg = rd;
+
+ return 0;
+}
+
+int arm_decode_add_sub(u32 instr, unsigned char *type,
+ unsigned long *immediate, struct stack_op *op)
+{
+ unsigned long imm12 = 0, imm = 0;
+ unsigned char sf = 0, sh = 0, S = 0, op_bit = 0;
+ unsigned char rn = 0, rd = 0;
+
+ S = EXTRACT_BIT(instr, 29);
+ op_bit = EXTRACT_BIT(instr, 30);
+ sf = EXTRACT_BIT(instr, 31);
+ sh = EXTRACT_BIT(instr, 22);
+ rd = instr & ONES(5);
+ rn = (instr >> 5) & ONES(5);
+ imm12 = (instr >> 10) & ONES(12);
+ imm = ZERO_EXTEND(imm12 << (sh * 12), (sf + 1) * 32);
+
+ *type = INSN_OTHER;
+
+ if ((!S && rd == CFI_SP) || rn == CFI_SP) {
+ *type = INSN_STACK;
+ op->dest.type = OP_DEST_REG;
+ op->dest.offset = 0;
+ op->dest.reg = rd;
+ op->src.type = imm12 ? OP_SRC_ADD : OP_SRC_REG;
+ op->src.offset = op_bit ? -1 * imm : imm;
+ op->src.reg = rn;
+ }
+ return 0;
+}
+
+int arm_decode_add_sub_tags(u32 instr, unsigned char *type,
+ unsigned long *immediate, struct stack_op *op)
+{
+ unsigned char decode_field = 0, rn = 0, rd = 0, uimm6 = 0;
+
+ decode_field = (instr >> 29) & ONES(3);
+ rd = instr & ONES(5);
+ rn = (instr >> 5) & ONES(5);
+ uimm6 = (instr >> 16) & ONES(6);
+
+ *immediate = uimm6;
+ *type = INSN_OTHER;
+
+#define ADDG_DECODE 4
+#define SUBG_DECODE 5
+ if (decode_field != ADDG_DECODE && decode_field != SUBG_DECODE)
+ return arm_decode_unknown(instr, type, immediate, op);
+
+#undef ADDG_DECODE
+#undef SUBG_DECODE
+ op->dest.type = OP_DEST_REG;
+ op->dest.offset = 0;
+ op->dest.reg = rd;
+ op->src.type = OP_SRC_ADD;
+ op->src.offset = 0;
+ op->src.reg = rn;
+
+ if (rd == CFI_SP)
+ *type = INSN_STACK;
+
+ return 0;
+}
+
+int arm_decode_logical(u32 instr, unsigned char *type,
+ unsigned long *immediate, struct stack_op *op)
+{
+ unsigned char sf = 0, opc = 0, N = 0;
+ unsigned char imms = 0, immr = 0, rn = 0, rd = 0;
+
+ rd = instr & ONES(5);
+ rn = (instr >> 5) & ONES(5);
+
+ imms = (instr >> 10) & ONES(6);
+ immr = (instr >> 16) & ONES(6);
+
+ N = EXTRACT_BIT(instr, 22);
+ opc = (instr >> 29) & ONES(2);
+ sf = EXTRACT_BIT(instr, 31);
+
+ if (N == 1 && sf == 0)
+ return arm_decode_unknown(instr, type, immediate, op);
+
+ *type = INSN_OTHER;
+ *immediate = (decode_bit_masks(N, imms, immr, true) >> 64);
+#define ANDS_DECODE 0b11
+ if (opc == ANDS_DECODE)
+ return 0;
+#undef ANDS_DECODE
+ if (rd == CFI_SP) {
+ *type = INSN_STACK;
+ op->dest.type = OP_DEST_REG;
+ op->dest.offset = 0;
+ op->dest.reg = CFI_SP;
+
+ op->src.type = OP_SRC_AND;
+ op->src.offset = 0;
+ op->src.reg = rn;
+ }
+
+ return 0;
+}
+
+int arm_decode_move_wide(u32 instr, unsigned char *type,
+ unsigned long *immediate, struct stack_op *op)
+{
+ u32 imm16 = 0;
+ unsigned char hw = 0, opc = 0, sf = 0;
+
+ sf = EXTRACT_BIT(instr, 31);
+ opc = (instr >> 29) & ONES(2);
+ hw = (instr >> 21) & ONES(2);
+ imm16 = (instr >> 5) & ONES(16);
+
+ if ((sf == 0 && (hw & 0x2)) || opc == 0x1)
+ return arm_decode_unknown(instr, type, immediate, op);
+
+ *type = INSN_OTHER;
+ *immediate = imm16;
+
+ return 0;
+}
+
+int arm_decode_bitfield(u32 instr, unsigned char *type,
+ unsigned long *immediate, struct stack_op *op)
+{
+ unsigned char sf = 0, opc = 0, N = 0;
+
+ sf = EXTRACT_BIT(instr, 31);
+ opc = (instr >> 29) & ONES(2);
+ N = EXTRACT_BIT(instr, 22);
+
+ if (opc == 0x3 || sf != N)
+ return arm_decode_unknown(instr, type, immediate, op);
+
+ *type = INSN_OTHER;
+
+ return 0;
+}
+
+int arm_decode_extract(u32 instr, unsigned char *type,
+ unsigned long *immediate, struct stack_op *op)
+{
+ unsigned char sf = 0, op21 = 0, N = 0, o0 = 0;
+ unsigned char imms = 0;
+ unsigned char decode_field = 0;
+
+ sf = EXTRACT_BIT(instr, 31);
+ op21 = (instr >> 29) & ONES(2);
+ N = EXTRACT_BIT(instr, 22);
+ o0 = EXTRACT_BIT(instr, 21);
+ imms = (instr >> 10) & ONES(6);
+
+ decode_field = (sf << 4) | (op21 << 2) | (N << 1) | o0;
+ *type = INSN_OTHER;
+ *immediate = imms;
+
+ if ((decode_field == 0 && !EXTRACT_BIT(imms, 5)) ||
+ decode_field == 0b10010)
+ return 0;
+
+ return arm_decode_unknown(instr, type, immediate, op);
+}
+
+static struct aarch64_insn_decoder br_sys_decoder[] = {
+ {
+ .mask = 0b1111000000000000000000,
+ .value = 0b0100000000000000000000,
+ .decode_func = arm_decode_br_cond_imm,
+ },
+ {
+ .mask = 0b1111100000000000000000,
+ .value = 0b1100000000000000000000,
+ .decode_func = arm_decode_except_gen,
+ },
+ {
+ .mask = 0b1111111111111111111111,
+ .value = 0b1100100000011001011111,
+ .decode_func = arm_decode_hints,
+ },
+ {
+ .mask = 0b1111111111111111100000,
+ .value = 0b1100100000011001100000,
+ .decode_func = arm_decode_barriers,
+ },
+ {
+ .mask = 0b1111111111000111100000,
+ .value = 0b1100100000000010000000,
+ .decode_func = arm_decode_pstate,
+ },
+ {
+ .mask = 0b1111111011000000000000,
+ .value = 0b1100100001000000000000,
+ .decode_func = arm_decode_system_insn,
+ },
+ {
+ .mask = 0b1111111010000000000000,
+ .value = 0b1100100010000000000000,
+ .decode_func = arm_decode_system_regs,
+ },
+ {
+ .mask = 0b1111000000000000000000,
+ .value = 0b1101000000000000000000,
+ .decode_func = arm_decode_br_uncond_reg,
+ },
+ {
+ .mask = 0b0110000000000000000000,
+ .value = 0b0000000000000000000000,
+ .decode_func = arm_decode_br_uncond_imm,
+ },
+ {
+ .mask = 0b0111000000000000000000,
+ .value = 0b0010000000000000000000,
+ .decode_func = arm_decode_br_comp_imm,
+ },
+ {
+ .mask = 0b0111000000000000000000,
+ .value = 0b0011000000000000000000,
+ .decode_func = arm_decode_br_tst_imm,
+ },
+
+};
+
+int arm_decode_br_sys(u32 instr, unsigned char *type,
+ unsigned long *immediate, struct stack_op *op)
+{
+ u32 decode_field = 0, op1 = 0;
+ unsigned char op0 = 0, op2 = 0;
+ int i = 0;
+
+ op0 = (instr >> 29) & ONES(3);
+ op1 = (instr >> 12) & ONES(14);
+ op2 = instr & ONES(5);
+
+ decode_field = op0;
+ decode_field = (decode_field << 19) | (op1 << 5) | op2;
+
+ for (i = 0; i < ARRAY_SIZE(br_sys_decoder); i++) {
+ if ((decode_field & br_sys_decoder[i].mask) ==
+ br_sys_decoder[i].value) {
+ return br_sys_decoder[i].decode_func(instr,
+ type,
+ immediate,
+ op);
+ }
+ }
+
+ return arm_decode_unknown(instr, type, immediate, op);
+}
+
+int arm_decode_br_cond_imm(u32 instr, unsigned char *type,
+ unsigned long *immediate, struct stack_op *op)
+{
+ unsigned char o0 = 0, o1 = 0;
+ u32 imm19;
+
+ o0 = EXTRACT_BIT(instr, 4);
+ o1 = EXTRACT_BIT(instr, 24);
+ imm19 = (instr >> 5) & ONES(19);
+
+ *immediate = SIGN_EXTEND(imm19 << 2, 19);
+
+ if ((o1 << 1) | o0)
+ return arm_decode_unknown(instr, type, immediate, op);
+
+ *type = INSN_JUMP_CONDITIONAL;
+
+ return 0;
+}
+
+static struct aarch64_insn_decoder except_gen_decoder[] = {
+ {
+ .mask = 0b00000100,
+ .value = 0b00000100,
+ },
+ {
+ .mask = 0b00001000,
+ .value = 0b00001000,
+ },
+ {
+ .mask = 0b00010000,
+ .value = 0b00010000,
+ },
+ {
+ .mask = 0b11111111,
+ .value = 0b00000000,
+ },
+ {
+ .mask = 0b11111101,
+ .value = 0b00100001,
+ },
+ {
+ .mask = 0b11111110,
+ .value = 0b00100010,
+ },
+ {
+ .mask = 0b11111101,
+ .value = 0b01000001,
+ },
+ {
+ .mask = 0b11111110,
+ .value = 0b01000010,
+ },
+ {
+ .mask = 0b11111111,
+ .value = 0b01100001,
+ },
+ {
+ .mask = 0b11111110,
+ .value = 0b01100010,
+ },
+ {
+ .mask = 0b11111111,
+ .value = 0b10000000,
+ },
+ {
+ .mask = 0b11111111,
+ .value = 0b10100000,
+ },
+ {
+ .mask = 0b11111100,
+ .value = 0b11000000,
+ },
+ {
+ .mask = 0b11111111,
+ .value = 0b11100001,
+ },
+ {
+ .mask = 0b11111110,
+ .value = 0b11100010,
+ },
+};
+
+int arm_decode_except_gen(u32 instr, unsigned char *type,
+ unsigned long *immediate, struct stack_op *op)
+{
+ u32 imm16 = 0;
+ unsigned char opc = 0, op2 = 0, LL = 0, decode_field = 0;
+ int i = 0;
+
+ imm16 = (instr >> 5) & ONES(16);
+ opc = (instr >> 21) & ONES(3);
+ op2 = (instr >> 2) & ONES(3);
+ LL = instr & ONES(2);
+ decode_field = (opc << 5) | (op2 << 2) | LL;
+
+ for (i = 0; i < ARRAY_SIZE(except_gen_decoder); i++) {
+ if ((decode_field & except_gen_decoder[i].mask) ==
+ except_gen_decoder[i].value) {
+ return arm_decode_unknown(instr, type, immediate, op);
+ }
+ }
+
+#define INSN_SVC 0b00000001
+#define INSN_HVC 0b00000010
+#define INSN_SMC 0b00000011
+#define INSN_BRK 0b00100000
+#define INSN_HLT 0b01000000
+#define INSN_DCPS1 0b10100001
+#define INSN_DCPS2 0b10100010
+#define INSN_DCPS3 0b10100011
+
+ switch (decode_field) {
+ case INSN_SVC:
+ case INSN_HVC:
+ case INSN_SMC:
+ *immediate = imm16;
+ *type = INSN_CONTEXT_SWITCH;
+ return 0;
+ case INSN_BRK:
+ if (imm16 == 0x800)
+ *type = INSN_BUG;
+ else if (imm16 == 0x100 || imm16 >= 0x900)
+ *type = INSN_CONTEXT_SWITCH;
+ else
+ *type = INSN_OTHER;
+ return 0;
+ case INSN_HLT:
+ case INSN_DCPS1:
+ case INSN_DCPS2:
+ case INSN_DCPS3:
+ *immediate = imm16;
+ *type = INSN_OTHER;
+ return 0;
+ default:
+ return arm_decode_unknown(instr, type, immediate, op);
+ }
+
+#undef INSN_SVC
+#undef INSN_HVC
+#undef INSN_SMC
+#undef INSN_BRK
+#undef INSN_HLT
+#undef INSN_DCPS1
+#undef INSN_DCPS2
+#undef INSN_DCPS3
+}
+
+int arm_decode_hints(u32 instr, unsigned char *type,
+ unsigned long *immediate, struct stack_op *op)
+{
+ *type = INSN_NOP;
+ return 0;
+}
+
+int arm_decode_barriers(u32 instr, unsigned char *type,
+ unsigned long *immediate, struct stack_op *op)
+{
+ /* TODO:check unallocated */
+ *type = INSN_OTHER;
+ return 0;
+}
+
+int arm_decode_pstate(u32 instr, unsigned char *type,
+ unsigned long *immediate, struct stack_op *op)
+{
+ /* TODO:check unallocated */
+ *type = INSN_OTHER;
+ return 0;
+}
+
+int arm_decode_system_insn(u32 instr, unsigned char *type,
+ unsigned long *immediate, struct stack_op *op)
+{
+ /* TODO:check unallocated */
+ *type = INSN_OTHER;
+ return 0;
+}
+
+int arm_decode_system_regs(u32 instr, unsigned char *type,
+ unsigned long *immediate, struct stack_op *op)
+{
+ /* TODO:check unallocated */
+ *type = INSN_OTHER;
+ return 0;
+}
+
+static struct aarch64_insn_decoder ret_decoder[] = {
+ /*
+ * RET, RETAA, RETAB
+ */
+ {
+ .mask = 0b1111111111111110000011111,
+ .value = 0b0010111110000000000000000,
+ .decode_func = NULL,
+ },
+ {
+ .mask = 0b1111111111111111111111111,
+ .value = 0b0010111110000101111111111,
+ .decode_func = NULL,
+ },
+ {
+ .mask = 0b1111111111111111111111111,
+ .value = 0b0010111110000111111111111,
+ .decode_func = NULL,
+ },
+};
+
+static struct aarch64_insn_decoder br_decoder[] = {
+ /*
+ * BR, BRAA, BRAAZ, BRAB, BRABZ
+ */
+ {
+ .mask = 0b1111111111111110000011111,
+ .value = 0b0000111110000000000000000,
+ .decode_func = NULL,
+ },
+ {
+ .mask = 0b1111111111111110000011111,
+ .value = 0b0000111110000100000011111,
+ .decode_func = NULL,
+ },
+ {
+ .mask = 0b1111111111111110000011111,
+ .value = 0b0000111110000110000011111,
+ .decode_func = NULL,
+ },
+ {
+ .mask = 0b1111111111111110000000000,
+ .value = 0b1000111110000100000000000,
+ .decode_func = NULL,
+ },
+ {
+ .mask = 0b1111111111111110000000000,
+ .value = 0b1000111110000110000000000,
+ .decode_func = NULL,
+ },
+};
+
+#define INSN_DRPS_FIELD 0b0101111110000001111100000
+#define INSN_DRPS_MASK 0b1111111111111111111111111
+
+static struct aarch64_insn_decoder ct_sw_decoder[] = {
+ /*
+ * ERET, ERETAA, ERETAB
+ */
+ {
+ .mask = INSN_DRPS_MASK,
+ .value = 0b0100111110000001111100000,
+ .decode_func = NULL,
+ },
+ {
+ .mask = INSN_DRPS_MASK,
+ .value = 0b0100111110000101111111111,
+ .decode_func = NULL,
+ },
+ {
+ .mask = INSN_DRPS_MASK,
+ .value = 0b0100111110000111111111111,
+ .decode_func = NULL,
+ },
+};
+
+static struct aarch64_insn_decoder call_decoder[] = {
+ /*
+ * BLR, BLRAA, BLRAAZ, BLRAB, BLRABZ
+ */
+ {
+ .mask = 0b1111111111111110000011111,
+ .value = 0b0001111110000000000000000,
+ .decode_func = NULL,
+ },
+ {
+ .mask = 0b1111111111111110000011111,
+ .value = 0b0001111110000100000011111,
+ .decode_func = NULL,
+ },
+ {
+ 0b1111111111111110000011111,
+ 0b0001111110000110000011111,
+ .decode_func = NULL,
+ },
+ {
+ .mask = 0b1111111111111110000000000,
+ .value = 0b1001111110000100000000000,
+ .decode_func = NULL,
+ },
+ {
+ .mask = 0b1111111111111110000000000,
+ .value = 0b1001111110000110000000000,
+ .decode_func = NULL,
+ },
+};
+
+int arm_decode_br_uncond_reg(u32 instr, unsigned char *type,
+ unsigned long *immediate, struct stack_op *op)
+{
+ u32 decode_field = 0;
+ int i = 0;
+
+ decode_field = instr & ONES(25);
+ *type = 0;
+ for (i = 0; i < ARRAY_SIZE(br_decoder); i++) {
+ if ((decode_field & br_decoder[i].mask) == br_decoder[i].value)
+ *type = INSN_JUMP_DYNAMIC;
+ }
+ for (i = 0; i < ARRAY_SIZE(call_decoder); i++) {
+ if ((decode_field & call_decoder[i].value) ==
+ call_decoder[i].value)
+ *type = INSN_CALL_DYNAMIC;
+ }
+ for (i = 0; i < ARRAY_SIZE(ret_decoder); i++) {
+ if ((decode_field & ret_decoder[i].mask) ==
+ ret_decoder[i].value)
+ *type = INSN_RETURN;
+ }
+ for (i = 0; i < ARRAY_SIZE(ct_sw_decoder); i++) {
+ if ((decode_field & ct_sw_decoder[i].mask) ==
+ ct_sw_decoder[i].value)
+ *type = INSN_CONTEXT_SWITCH;
+ }
+ if ((decode_field & INSN_DRPS_MASK) == INSN_DRPS_FIELD)
+ *type = INSN_OTHER;
+ if (*type == 0)
+ return arm_decode_unknown(instr, type, immediate, op);
+ return 0;
+}
+
+#undef INSN_DRPS_FIELD
+#undef INSN_DRPS_MASK
+
+int arm_decode_br_uncond_imm(u32 instr, unsigned char *type,
+ unsigned long *immediate, struct stack_op *op)
+{
+ unsigned char decode_field = 0;
+ u32 imm26 = 0;
+
+ decode_field = EXTRACT_BIT(instr, 31);
+ imm26 = instr & ONES(26);
+
+ *immediate = SIGN_EXTEND(imm26 << 2, 28);
+ if (decode_field == 0)
+ *type = INSN_JUMP_UNCONDITIONAL;
+ else
+ *type = INSN_CALL;
+
+ return 0;
+}
+
+int arm_decode_br_comp_imm(u32 instr, unsigned char *type,
+ unsigned long *immediate, struct stack_op *op)
+{
+ u32 imm19 = (instr >> 5) & ONES(19);
+
+ *immediate = SIGN_EXTEND(imm19 << 2, 21);
+ *type = INSN_JUMP_CONDITIONAL;
+ return 0;
+}
+
+int arm_decode_br_tst_imm(u32 instr, unsigned char *type,
+ unsigned long *immediate, struct stack_op *op)
+{
+ u32 imm14 = (instr >> 5) & ONES(14);
+
+ *immediate = SIGN_EXTEND(imm14 << 2, 16);
+ *type = INSN_JUMP_CONDITIONAL;
+ return 0;
+}
+
+static struct aarch64_insn_decoder ld_st_decoder[] = {
+ {
+ .mask = 0b101111111111100,
+ .value = 0b000010000000000,
+ .decode_func = arm_decode_adv_simd_mult,
+ },
+ {
+ .mask = 0b101111110000000,
+ .value = 0b000010100000000,
+ .decode_func = arm_decode_adv_simd_mult_post,
+ },
+ {
+ .mask = 0b101111101111100,
+ .value = 0b000011000000000,
+ .decode_func = arm_decode_adv_simd_single,
+ },
+ {
+ .mask = 0b101111100000000,
+ .value = 0b000011100000000,
+ .decode_func = arm_decode_adv_simd_single_post,
+ },
+ {
+ .mask = 0b111111010000000,
+ .value = 0b110101010000000,
+ .decode_func = arm_decode_ld_st_mem_tags,
+ },
+ {
+ .mask = 0b001111000000000,
+ .value = 0b000000000000000,
+ .decode_func = arm_decode_ld_st_exclusive,
+ },
+ {
+ .mask = 0b001111010000011,
+ .value = 0b000101000000000,
+ .decode_func = arm_decode_ldapr_stlr_unsc_imm,
+ },
+ {
+ .mask = 0b001101000000000,
+ .value = 0b000100000000000,
+ .decode_func = arm_decode_ld_regs_literal,
+ },
+ {
+ .mask = 0b001101100000000,
+ .value = 0b001000000000000,
+ .decode_func = arm_decode_ld_st_noalloc_pair_off,
+ },
+ {
+ .mask = 0b001101100000000,
+ .value = 0b001000100000000,
+ .decode_func = arm_decode_ld_st_regs_pair_post,
+ },
+ {
+ .mask = 0b001101100000000,
+ .value = 0b001001000000000,
+ .decode_func = arm_decode_ld_st_regs_pair_off,
+ },
+ {
+ .mask = 0b001101100000000,
+ .value = 0b001001100000000,
+ .decode_func = arm_decode_ld_st_regs_pair_pre,
+ },
+ {
+ .mask = 0b001101010000011,
+ .value = 0b001100000000000,
+ .decode_func = arm_decode_ld_st_regs_unsc_imm,
+ },
+ {
+ .mask = 0b001101010000011,
+ .value = 0b001100000000001,
+ .decode_func = arm_decode_ld_st_imm_post,
+ },
+ {
+ .mask = 0b001101010000011,
+ .value = 0b001100000000010,
+ .decode_func = arm_decode_ld_st_imm_unpriv,
+ },
+ {
+ .mask = 0b001101010000011,
+ .value = 0b001100000000011,
+ .decode_func = arm_decode_ld_st_imm_pre,
+ },
+ {
+ .mask = 0b001101010000011,
+ .value = 0b001100010000000,
+ .decode_func = arm_decode_atomic,
+ },
+ {
+ .mask = 0b001101010000011,
+ .value = 0b001100010000010,
+ .decode_func = arm_decode_ld_st_regs_off,
+ },
+ {
+ .mask = 0b001101010000001,
+ .value = 0b001100010000001,
+ .decode_func = arm_decode_ld_st_regs_pac,
+ },
+ {
+ .mask = 0b001101000000000,
+ .value = 0b001101000000000,
+ .decode_func = arm_decode_ld_st_regs_unsigned,
+ },
+};
+
+int arm_decode_ld_st(u32 instr, unsigned char *type,
+ unsigned long *immediate, struct stack_op *op)
+{
+ u32 decode_field = 0;
+ int i = 0;
+ unsigned char op0 = 0, op1 = 0, op2 = 0, op3 = 0, op4 = 0;
+
+ op0 = (instr >> 28) & ONES(4);
+ op1 = EXTRACT_BIT(instr, 26);
+ op2 = (instr >> 23) & ONES(2);
+ op3 = (instr >> 16) & ONES(6);
+ op4 = (instr >> 10) & ONES(2);
+ decode_field = (op0 << 3) | (op1 << 2) | op2;
+ decode_field = (decode_field << 8) | (op3 << 2) | op4;
+
+ for (i = 0; i < ARRAY_SIZE(ld_st_decoder); i++) {
+ if ((decode_field & ld_st_decoder[i].mask) ==
+ ld_st_decoder[i].value) {
+ return ld_st_decoder[i].decode_func(instr,
+ type,
+ immediate,
+ op);
+ }
+ }
+ return arm_decode_unknown(instr, type, immediate, op);
+}
+
+static int adv_simd_mult_fields[] = {
+ 0b00000,
+ 0b00010,
+ 0b00100,
+ 0b00110,
+ 0b00111,
+ 0b01000,
+ 0b01010,
+ 0b10000,
+ 0b10010,
+ 0b10100,
+ 0b10110,
+ 0b10111,
+ 0b11000,
+ 0b11010,
+};
+
+int arm_decode_adv_simd_mult(u32 instr, unsigned char *type,
+ unsigned long *immediate, struct stack_op *op)
+{
+ unsigned char L = 0, opcode = 0, rn = 0, rt = 0;
+ unsigned char decode_field = 0;
+ int i = 0;
+
+ L = EXTRACT_BIT(instr, 22);
+ opcode = (instr >> 12) & ONES(4);
+
+ decode_field = (L << 4) | opcode;
+ rn = (instr >> 5) & ONES(5);
+ rt = instr & ONES(5);
+ *type = INSN_OTHER;
+
+ for (i = 0; i < ARRAY_SIZE(adv_simd_mult_fields); i++) {
+ if ((decode_field & 0b11111) == adv_simd_mult_fields[i]) {
+ if (rn != 31)
+ return 0;
+ *type = INSN_STACK;
+ }
+ }
+ if (*type != INSN_STACK)
+ return arm_decode_unknown(instr, type, immediate, op);
+
+ if (!L) {
+ op->dest.type = OP_DEST_REG_INDIRECT;
+ op->dest.reg = CFI_SP;
+ op->dest.offset = 0;
+ op->src.type = OP_SRC_REG;
+ op->src.reg = rt;
+ op->src.offset = 0;
+ } else {
+ op->src.type = OP_SRC_REG_INDIRECT;
+ op->src.reg = CFI_SP;
+ op->src.offset = 0;
+ op->dest.type = OP_SRC_REG;
+ op->dest.reg = rt;
+ op->dest.offset = 0;
+ }
+
+ return 0;
+}
+
+int arm_decode_adv_simd_mult_post(u32 instr, unsigned char *type,
+ unsigned long *immediate,
+ struct stack_op *op)
+{
+ /* same opcode as for the no offset variant */
+ unsigned char rm = 0;
+ int ret = 0;
+
+ rm = (instr >> 16) & ONES(5);
+
+ ret = arm_decode_adv_simd_mult(instr, type, immediate, op);
+
+ /*
+ * This is actually irrelevant if the offset is given by a register
+ * however there is no way to know the offset value from the encoding
+ * in such a case.
+ */
+ if (op->dest.type == OP_DEST_REG_INDIRECT)
+ op->dest.offset = rm;
+ if (op->src.type == OP_SRC_REG_INDIRECT)
+ op->src.offset = rm;
+ return ret;
+}
+
+static struct aarch64_insn_decoder simd_single_decoder[] = {
+ {
+ .mask = 0b11111000,
+ .value = 0b00000000,
+ .decode_func = NULL,
+ },
+ {
+ .mask = 0b11111000,
+ .value = 0b00001000,
+ .decode_func = NULL,
+ },
+ {
+ .mask = 0b11111001,
+ .value = 0b00010000,
+ .decode_func = NULL,
+ },
+ {
+ .mask = 0b11111001,
+ .value = 0b00011000,
+ .decode_func = NULL,
+ },
+ {
+ .mask = 0b11111011,
+ .value = 0b00100000,
+ .decode_func = NULL,
+ },
+ {
+ .mask = 0b11111111,
+ .value = 0b00100001,
+ .decode_func = NULL,
+ },
+ {
+ .mask = 0b11111011,
+ .value = 0b00101000,
+ .decode_func = NULL,
+ },
+ {
+ .mask = 0b11111111,
+ .value = 0b00101001,
+ .decode_func = NULL,
+ },
+ {
+ .mask = 0b11111000,
+ .value = 0b01000000,
+ .decode_func = NULL,
+ },
+ {
+ .mask = 0b11111000,
+ .value = 0b01001000,
+ .decode_func = NULL,
+ },
+ {
+ .mask = 0b11111001,
+ .value = 0b01010000,
+ .decode_func = NULL,
+ },
+ {
+ .mask = 0b11111001,
+ .value = 0b01011000,
+ .decode_func = NULL,
+ },
+ {
+ .mask = 0b11111011,
+ .value = 0b01100000,
+ .decode_func = NULL,
+ },
+ {
+ .mask = 0b11111111,
+ .value = 0b01100001,
+ .decode_func = NULL,
+ },
+ {
+ .mask = 0b11111011,
+ .value = 0b01101000,
+ .decode_func = NULL,
+ },
+ {
+ .mask = 0b11111111,
+ .value = 0b01101001,
+ .decode_func = NULL,
+ },
+ {
+ .mask = 0b11111000,
+ .value = 0b10000000,
+ .decode_func = NULL,
+ },
+ {
+ .mask = 0b11111000,
+ .value = 0b10001000,
+ .decode_func = NULL,
+ },
+ {
+ .mask = 0b11111001,
+ .value = 0b10010000,
+ .decode_func = NULL,
+ },
+ {
+ .mask = 0b11111001,
+ .value = 0b10011000,
+ .decode_func = NULL,
+ },
+ {
+ .mask = 0b11111011,
+ .value = 0b10100000,
+ .decode_func = NULL,
+ },
+ {
+ .mask = 0b11111111,
+ .value = 0b10100001,
+ .decode_func = NULL,
+ },
+ {
+ .mask = 0b11111011,
+ .value = 0b10101000,
+ .decode_func = NULL,
+ },
+ {
+ .mask = 0b11111111,
+ .value = 0b10101001,
+ .decode_func = NULL,
+ },
+ {
+ .mask = 0b11111100,
+ .value = 0b10110000,
+ .decode_func = NULL,
+ },
+ {
+ .mask = 0b11111100,
+ .value = 0b10111000,
+ .decode_func = NULL,
+ },
+ {
+ .mask = 0b11000000,
+ .value = 0b11111000,
+ .decode_func = NULL,
+ },
+ {
+ .mask = 0b11111000,
+ .value = 0b11001000,
+ .decode_func = NULL,
+ },
+ {
+ .mask = 0b11111001,
+ .value = 0b11010000,
+ .decode_func = NULL,
+ },
+ {
+ .mask = 0b11111001,
+ .value = 0b11011000,
+ .decode_func = NULL,
+ },
+ {
+ .mask = 0b11111011,
+ .value = 0b11100000,
+ .decode_func = NULL,
+ },
+ {
+ .mask = 0b11111111,
+ .value = 0b11100001,
+ .decode_func = NULL,
+ },
+ {
+ .mask = 0b11111011,
+ .value = 0b11101000,
+ .decode_func = NULL,
+ },
+ {
+ .mask = 0b11111111,
+ .value = 0b11101001,
+ .decode_func = NULL,
+ },
+ {
+ .mask = 0b11111100,
+ .value = 0b11110000,
+ .decode_func = NULL,
+ },
+ {
+ .mask = 0b11111100,
+ .value = 0b11111000,
+ .decode_func = NULL,
+ },
+};
+
+int arm_decode_adv_simd_single(u32 instr, unsigned char *type,
+ unsigned long *immediate, struct stack_op *op)
+{
+ unsigned char L = 0, R = 0, S = 0, opcode = 0, size = 0;
+ unsigned char rn = 0, rt = 0, dfield = 0;
+ int i = 0;
+
+ L = EXTRACT_BIT(instr, 22);
+ R = EXTRACT_BIT(instr, 21);
+ S = EXTRACT_BIT(instr, 12);
+ opcode = (instr >> 13) & ONES(3);
+ size = (instr >> 10) & ONES(2);
+
+ dfield = (L << 7) | (R << 6) | (opcode << 3) | (S << 2) | size;
+
+ *type = INSN_OTHER;
+ rn = (instr << 5) & ONES(5);
+
+ for (i = 0; i < ARRAY_SIZE(simd_single_decoder); i++) {
+ if ((dfield & simd_single_decoder[i].mask) ==
+ simd_single_decoder[i].value) {
+ if (rn != CFI_SP)
+ return 0;
+ *type = INSN_STACK;
+ }
+ }
+
+ if (*type == INSN_OTHER)
+ return arm_decode_unknown(instr, type, immediate, op);
+
+ rt = instr & ONES(5);
+ if (!L) {
+ op->dest.type = OP_DEST_REG_INDIRECT;
+ op->dest.reg = CFI_SP;
+ op->dest.offset = 0;
+ op->src.type = OP_SRC_REG;
+ op->src.reg = rt;
+ op->src.offset = 0;
+ } else {
+ op->src.type = OP_SRC_REG_INDIRECT;
+ op->src.reg = CFI_SP;
+ op->src.offset = 0;
+ op->dest.type = OP_DEST_REG;
+ op->dest.reg = rt;
+ op->dest.offset = 0;
+ }
+ return 0;
+}
+
+int arm_decode_adv_simd_single_post(u32 instr, unsigned char *type,
+ unsigned long *immediate,
+ struct stack_op *op)
+{
+ /* same opcode as for the no offset variant */
+ unsigned char rm = 0;
+ int ret = 0;
+
+ rm = (instr >> 16) & ONES(5);
+
+ ret = arm_decode_adv_simd_single(instr, type, immediate, op);
+
+ /*
+ * This is actually irrelevant if the offset is given by a register
+ * however there is no way to know the offset value from the encoding
+ * in such a case.
+ */
+ if (op->dest.type == OP_DEST_REG_INDIRECT)
+ op->dest.offset = rm;
+ if (op->src.type == OP_SRC_REG_INDIRECT)
+ op->src.offset = rm;
+ return ret;
+}
+
+int arm_decode_ld_st_mem_tags(u32 instr, unsigned char *type,
+ unsigned long *immediate, struct stack_op *op)
+{
+ u32 imm9 = 0;
+ unsigned char opc = 0, op2 = 0, rn = 0, rt = 0, decode_field = 0;
+
+ imm9 = (instr >> 12) & ONES(9);
+ opc = (instr >> 22) & ONES(2);
+ op2 = (instr >> 10) & ONES(2);
+ rn = (instr >> 5) & ONES(5);
+ rt = instr & ONES(6);
+
+ decode_field = (opc << 2) | op2;
+
+ if (decode_field == 0x0 ||
+ (decode_field == 0x8 && imm9 != 0) ||
+ (decode_field == 0xC && imm9 != 0)) {
+ return arm_decode_unknown(instr, type, immediate, op);
+ }
+
+ if (rn != CFI_SP) {
+ *type = INSN_OTHER;
+ return 0;
+ }
+ *type = INSN_STACK;
+ *immediate = imm9;
+
+ /*
+ * Offset should normally be shifted to the
+ * left of LOG2_TAG_GRANULE
+ */
+ switch (decode_field) {
+ case 1:
+ case 5:
+ case 9:
+ case 13:
+ /* post index */
+ case 3:
+ case 7:
+ case 8:
+ case 11:
+ case 15:
+ /* pre index */
+ op->dest.reg = CFI_SP;
+ op->dest.type = OP_DEST_PUSH;
+ op->dest.offset = SIGN_EXTEND(imm9, 9);
+ op->src.reg = rt;
+ op->src.type = OP_SRC_REG;
+ op->src.offset = 0;
+ return 0;
+ case 2:
+ case 6:
+ case 10:
+ case 14:
+ /* store */
+ op->dest.reg = CFI_SP;
+ op->dest.type = OP_DEST_REG_INDIRECT;
+ op->dest.offset = SIGN_EXTEND(imm9, 9);
+ op->src.reg = rt;
+ op->src.type = OP_SRC_REG;
+ op->src.offset = 0;
+ return 0;
+ case 4:
+ case 12:
+ /* load */
+ op->src.reg = CFI_SP;
+ op->src.type = OP_SRC_REG_INDIRECT;
+ op->src.offset = SIGN_EXTEND(imm9, 9);
+ op->dest.reg = rt;
+ op->dest.type = OP_DEST_REG;
+ op->dest.offset = 0;
+ return 0;
+ }
+
+ return -1;
+}
+
+#define ST_EXCL_UNALLOC_1 0b001010
+#define ST_EXCL_UNALLOC_2 0b000010
+
+#define LDXRB 0b000100
+#define LDAXRB 0b000101
+#define LDLARB 0b001100
+#define LDARB 0b001101
+#define LDXRH 0b010100
+#define LDAXRH 0b010101
+#define LDLARH 0b011100
+#define LDARH 0b011101
+#define LDXR 0b100100
+#define LDAXR 0b100101
+#define LDXP 0b100110
+#define LDAXP 0b100111
+#define LDLAR 0b101100
+#define LDAR 0b101101
+#define LDXR_64 0b110100
+#define LDAXR_64 0b110101
+#define LDXP_64 0b110110
+#define LDAXP_64 0b110111
+#define LDLAR_64 0b111100
+#define LDAR_64 0b111101
+
+#define LD_EXCL_NUMBER 20
+
+static int ld_excl_masks[] = {
+ LDXRB,
+ LDAXRB,
+ LDLARB,
+ LDARB,
+ LDXRH,
+ LDAXRH,
+ LDLARH,
+ LDARH,
+ LDXR,
+ LDAXR,
+ LDXP,
+ LDAXP,
+ LDLAR,
+ LDAR,
+ LDXR_64,
+ LDAXR_64,
+ LDXP_64,
+ LDAXP_64,
+ LDLAR_64,
+ LDAR_64,
+};
+
+int arm_decode_ld_st_exclusive(u32 instr, unsigned char *type,
+ unsigned long *immediate, struct stack_op *op)
+{
+ unsigned char size = 0, o2 = 0, L = 0, o1 = 0, o0 = 0;
+ unsigned char rt = 0, rt2 = 0, rn = 0;
+ unsigned char decode_field = 0;
+ int i = 0;
+
+ size = (instr >> 30) & ONES(2);
+ o2 = EXTRACT_BIT(instr, 23);
+ L = EXTRACT_BIT(instr, 22);
+ o1 = EXTRACT_BIT(instr, 21);
+ o0 = EXTRACT_BIT(instr, 15);
+
+ rt2 = (instr >> 10) & ONES(5);
+ rn = (instr >> 5) & ONES(5);
+ rt = instr & ONES(5);
+
+ decode_field = (size << 4) | (o2 << 3) | (L << 2) | (o1 << 1) | o0;
+
+ if ((decode_field & ST_EXCL_UNALLOC_1) == ST_EXCL_UNALLOC_1 ||
+ (decode_field & 0b101010) == ST_EXCL_UNALLOC_2) {
+ if (rt2 != 31)
+ return arm_decode_unknown(instr, type, immediate, op);
+ }
+
+ if (rn != 31) {
+ *type = INSN_OTHER;
+ return 0;
+ }
+
+ *type = INSN_STACK;
+ for (i = 0; i < LD_EXCL_NUMBER; i++) {
+ if ((decode_field & 0b111111) == ld_excl_masks[i]) {
+ op->src.type = OP_SRC_REG_INDIRECT;
+ op->src.reg = CFI_SP;
+ op->src.offset = 0;
+ op->dest.type = OP_DEST_REG;
+ op->dest.reg = rt;
+ op->dest.offset = 0;
+ return 0;
+ }
+ }
+
+ op->dest.type = OP_DEST_REG_INDIRECT;
+ op->dest.reg = CFI_SP;
+ op->dest.offset = 0;
+ op->src.type = OP_SRC_REG;
+ op->src.reg = rt;
+ op->src.offset = 0;
+
+ return 0;
+}
+
+#undef ST_EXCL_UNALLOC_1
+#undef ST_EXCL_UNALLOC_2
+
+#undef LD_EXCL_NUMBER
+
+#undef LDXRB
+#undef LDAXRB
+#undef LDLARB
+#undef LDARB
+#undef LDXRH
+#undef LDAXRH
+#undef LDLARH
+#undef LDARH
+#undef LDXR
+#undef LDAXR
+#undef LDXP
+#undef LDAXP
+#undef LDLAR
+#undef LDAR
+#undef LDXR_64
+#undef LDAXR_64
+#undef LDXP_64
+#undef LDAXP_64
+#undef LDLAR_64
+#undef LDAR_64
+
+int arm_decode_ldapr_stlr_unsc_imm(u32 instr, unsigned char *type,
+ unsigned long *immediate,
+ struct stack_op *op)
+{
+ u32 imm9 = 0;
+ unsigned char size = 0, opc = 0, rn = 0, rt = 0, decode_field = 0;
+
+ imm9 = (instr >> 12) & ONES(9);
+ size = (instr >> 30) & ONES(2);
+ opc = (instr >> 22) & ONES(2);
+ rn = (instr >> 5) & ONES(5);
+ rt = instr & ONES(5);
+
+ decode_field = (size << 2) | opc;
+ if (decode_field == 0xB ||
+ decode_field == 0xE ||
+ decode_field == 0xF) {
+ return arm_decode_unknown(instr, type, immediate, op);
+ }
+
+ if (rn != 31) {
+ *type = INSN_OTHER;
+ return 0;
+ }
+ *type = INSN_STACK;
+ *immediate = imm9;
+ switch (decode_field) {
+ case 1:
+ case 2:
+ case 3:
+ case 5:
+ case 6:
+ case 7:
+ case 9:
+ case 10:
+ case 13:
+ /* load */
+ op->src.type = OP_SRC_REG_INDIRECT;
+ op->src.reg = CFI_SP;
+ op->src.offset = SIGN_EXTEND(imm9, 9);
+ op->dest.type = OP_DEST_REG;
+ op->dest.reg = rt;
+ op->dest.offset = 0;
+ break;
+ default:
+ /* store */
+ op->dest.type = OP_SRC_REG_INDIRECT;
+ op->dest.reg = CFI_SP;
+ op->dest.offset = SIGN_EXTEND(imm9, 9);
+ op->src.type = OP_SRC_REG;
+ op->src.reg = rt;
+ op->src.offset = 0;
+ break;
+ }
+
+ return 0;
+}
+
+int arm_decode_ld_regs_literal(u32 instr, unsigned char *type,
+ unsigned long *immediate, struct stack_op *op)
+{
+ unsigned char opc = 0, V = 0;
+
+ opc = (instr >> 30) & ONES(2);
+ V = EXTRACT_BIT(instr, 26);
+
+ if (((opc << 1) | V) == 0x7)
+ return arm_decode_unknown(instr, type, immediate, op);
+
+ *type = INSN_OTHER;
+ return 0;
+}
+
+int arm_decode_ld_st_noalloc_pair_off(u32 instr, unsigned char *type,
+ unsigned long *immediate,
+ struct stack_op *op)
+{
+ unsigned char opc = 0, V = 0, L = 0;
+ unsigned char decode_field = 0;
+
+ opc = (instr >> 30) & ONES(2);
+ V = EXTRACT_BIT(instr, 26);
+ L = EXTRACT_BIT(instr, 22);
+
+ decode_field = (opc << 2) | (V << 1) | L;
+
+ if (decode_field == 0x4 ||
+ decode_field == 0x5 ||
+ decode_field >= 12) {
+ return arm_decode_unknown(instr, type, immediate, op);
+ }
+ return arm_decode_ld_st_regs_pair_off(instr, type, immediate, op);
+}
+
+int arm_decode_ld_st_regs_pair_off(u32 instr, unsigned char *type,
+ unsigned long *immediate,
+ struct stack_op *op)
+{
+ unsigned char opc = 0, V = 0, L = 0, bit = 0;
+ unsigned char imm7 = 0, rt2 = 0, rt = 0, rn = 0;
+ unsigned char decode_field = 0;
+ int scale = 0;
+
+ opc = (instr >> 30) & ONES(2);
+ V = EXTRACT_BIT(instr, 26);
+ L = EXTRACT_BIT(instr, 22);
+ imm7 = (instr >> 15) & ONES(7);
+ rt2 = (instr >> 10) & ONES(5);
+ rn = (instr >> 5) & ONES(5);
+ rt = instr & ONES(5);
+ bit = EXTRACT_BIT(opc, 1);
+ scale = 2 + bit;
+
+ decode_field = (opc << 2) | (V << 1) | L;
+
+ if (decode_field >= 0xC)
+ return arm_decode_unknown(instr, type, immediate, op);
+
+ *immediate = (SIGN_EXTEND(imm7, 7)) << scale;
+
+ if (rn != CFI_SP) {
+ *type = INSN_OTHER;
+ return 0;
+ }
+
+ *type = INSN_STACK;
+
+ switch (decode_field) {
+ case 1:
+ case 3:
+ case 5:
+ case 7:
+ case 9:
+ case 11:
+ /* load */
+ op->src.type = OP_SRC_REG_INDIRECT;
+ op->src.reg = CFI_SP;
+ op->src.offset = 0;
+ op->dest.type = OP_DEST_REG;
+ op->dest.reg = rt;
+ op->dest.offset = 0;
+ op->extra.used = 1;
+ op->extra.reg = rt2;
+ op->extra.offset = 8;
+ break;
+ default:
+ op->dest.type = OP_DEST_REG_INDIRECT;
+ op->dest.reg = CFI_SP;
+ op->dest.offset = 8;
+ op->src.type = OP_SRC_REG;
+ op->src.reg = rt2;
+ op->src.offset = 0;
+ op->extra.used = 1;
+ op->extra.reg = rt;
+ op->extra.offset = 0;
+ /* store */
+ }
+ return 0;
+}
+
+int arm_decode_ld_st_regs_pair_post(u32 instr, unsigned char *type,
+ unsigned long *immediate,
+ struct stack_op *op)
+{
+ int ret = 0;
+
+ ret = arm_decode_ld_st_regs_pair_off(instr, type, immediate, op);
+ if (ret < 0 || *type == INSN_OTHER)
+ return ret;
+ if (op->dest.type == OP_DEST_REG_INDIRECT) {
+ op->dest.type = OP_DEST_PUSH;
+ op->dest.reg = CFI_SP;
+ }
+
+ if (op->src.type == OP_SRC_REG_INDIRECT) {
+ op->src.type = OP_SRC_POP;
+ op->src.reg = CFI_SP;
+ }
+
+ return ret;
+}
+
+int arm_decode_ld_st_regs_pair_pre(u32 instr, unsigned char *type,
+ unsigned long *immediate,
+ struct stack_op *op)
+{
+ return arm_decode_ld_st_regs_pair_post(instr, type, immediate, op);
+}
+
+int arm_decode_ld_st_regs_unsc_imm(u32 instr, unsigned char *type,
+ unsigned long *immediate,
+ struct stack_op *op)
+{
+ u32 imm9 = 0;
+ unsigned char size = 0, V = 0, opc = 0, rn = 0, rt = 0;
+ unsigned char decode_field = 0;
+
+ size = (instr >> 30) & ONES(2);
+ V = EXTRACT_BIT(instr, 26);
+ opc = (instr >> 22) & ONES(2);
+
+ imm9 = (instr >> 12) & ONES(9);
+ rn = (instr >> 5) & ONES(5);
+ rt = instr & ONES(5);
+
+ decode_field = (size << 2) | (V << 2) | opc;
+
+ switch (decode_field) {
+ case 0b01110:
+ case 0b01111:
+ case 0b11110:
+ case 0b11111:
+ case 0b10011:
+ case 0b11011:
+ case 0b10110:
+ case 0b10111:
+ return arm_decode_unknown(instr, type, immediate, op);
+ case 26:
+ /* prefetch */
+ *type = INSN_OTHER;
+ return 0;
+ case 1:
+ case 2:
+ case 3:
+ case 5:
+ case 7:
+ case 9:
+ case 10:
+ case 11:
+ case 13:
+ case 17:
+ case 18:
+ case 21:
+ case 25:
+ case 29:
+ /* load */
+ if (rn != CFI_SP) {
+ *type = INSN_OTHER;
+ return 0;
+ }
+ op->src.type = OP_SRC_REG_INDIRECT;
+ op->src.reg = CFI_SP;
+ op->src.offset = SIGN_EXTEND(imm9, 9);
+ op->dest.type = OP_DEST_REG;
+ op->dest.reg = rt;
+ op->dest.offset = 0;
+ break;
+ default:
+ if (rn != CFI_SP) {
+ *type = INSN_OTHER;
+ return 0;
+ }
+ op->dest.type = OP_DEST_REG_INDIRECT;
+ op->dest.reg = CFI_SP;
+ op->dest.offset = SIGN_EXTEND(imm9, 9);
+ op->src.type = OP_DEST_REG;
+ op->src.reg = rt;
+ op->src.offset = 0;
+ break;
+ }
+
+ *type = INSN_STACK;
+ return 0;
+}
+
+static struct aarch64_insn_decoder ld_unsig_unalloc_decoder[] = {
+ {
+ .mask = 0b01110,
+ .value = 0b01110,
+ },
+ {
+ .mask = 0b10111,
+ .value = 0b10011,
+ },
+ {
+ .mask = 0b10110,
+ .value = 0b10110,
+ },
+};
+
+int arm_decode_ld_st_regs_unsigned(u32 instr, unsigned char *type,
+ unsigned long *immediate,
+ struct stack_op *op)
+{
+ unsigned char size = 0, V = 0, opc = 0, rn = 0, rt = 0;
+ unsigned char decode_field = 0;
+ u32 imm12 = 0;
+ int i = 0;
+
+ size = (instr >> 30) & ONES(2);
+ V = EXTRACT_BIT(instr, 26);
+ opc = (instr >> 22) & ONES(2);
+
+ decode_field = (size << 3) | (V << 2) | opc;
+ for (i = 0; i < ARRAY_SIZE(ld_unsig_unalloc_decoder); i++) {
+ if ((decode_field & ld_unsig_unalloc_decoder[i].mask) ==
+ ld_unsig_unalloc_decoder[i].value) {
+ return arm_decode_unknown(instr, type,
+ immediate, op);
+ }
+ }
+
+ imm12 = (instr >> 10) & ONES(12);
+ rn = (instr >> 5) & ONES(5);
+ rt = instr & ONES(5);
+
+ if (rn != CFI_SP || decode_field == 26) {
+ *type = INSN_OTHER;
+ return 0;
+ }
+
+ *type = INSN_STACK;
+
+ switch (decode_field) {
+ case 1:
+ case 2:
+ case 3:
+ case 5:
+ case 7:
+ case 9:
+ case 10:
+ case 11:
+ case 13:
+ case 17:
+ case 18:
+ case 21:
+ case 25:
+ /* load */
+ op->src.type = OP_SRC_REG_INDIRECT;
+ op->src.reg = CFI_SP;
+ op->src.offset = imm12;
+ op->dest.type = OP_DEST_REG;
+ op->dest.reg = rt;
+ op->dest.offset = 0;
+ break;
+ default: /* store */
+ op->dest.type = OP_DEST_REG_INDIRECT;
+ op->dest.reg = CFI_SP;
+ op->dest.offset = imm12;
+ op->src.type = OP_DEST_REG;
+ op->src.reg = rt;
+ op->src.offset = 0;
+ }
+
+ return 0;
+}
+
+int arm_decode_ld_st_imm_post(u32 instr, unsigned char *type,
+ unsigned long *immediate,
+ struct stack_op *op)
+{
+ unsigned char size = 0, V = 0, opc = 0;
+ unsigned char decode_field = 0;
+ u32 imm9 = 0;
+ int ret = 0;
+
+ size = (instr >> 30) & ONES(2);
+ V = EXTRACT_BIT(instr, 26);
+ opc = (instr >> 22) & ONES(2);
+
+ imm9 = (instr >> 12) & ONES(9);
+
+ decode_field = (size << 2) | (V << 2) | opc;
+
+ if (decode_field == 0b11010)
+ return arm_decode_unknown(instr, type, immediate, op);
+
+ ret = arm_decode_ld_st_regs_unsigned(instr, type, immediate, op);
+ if (ret < 0 || *type == INSN_OTHER)
+ return ret;
+
+ if (op->dest.type == OP_DEST_REG_INDIRECT) {
+ op->dest.type = OP_DEST_PUSH;
+ op->dest.reg = CFI_SP;
+ op->dest.offset = SIGN_EXTEND(imm9, 9);
+ }
+
+ if (op->src.type == OP_SRC_REG_INDIRECT) {
+ op->src.type = OP_SRC_POP;
+ op->src.reg = CFI_SP;
+ op->src.offset = SIGN_EXTEND(imm9, 9);
+ }
+
+ return 0;
+}
+
+int arm_decode_ld_st_imm_pre(u32 instr, unsigned char *type,
+ unsigned long *immediate, struct stack_op *op)
+{
+ return arm_decode_ld_st_imm_post(instr, type, immediate, op);
+}
+
+#define LD_UNPR_UNALLOC_1 0b10011
+#define LD_UNPR_UNALLOC_2 0b11010
+int arm_decode_ld_st_imm_unpriv(u32 instr, unsigned char *type,
+ unsigned long *immediate, struct stack_op *op)
+{
+ unsigned char size = 0, V = 0, opc = 0, rn = 0, rt = 0;
+ unsigned char decode_field = 0;
+ u32 imm9 = 0;
+
+ size = (instr >> 30) & ONES(2);
+ V = EXTRACT_BIT(instr, 26);
+ opc = (instr >> 22) & ONES(2);
+
+ imm9 = (instr >> 12) & ONES(9);
+
+ decode_field = (size << 3) | (V << 2) | opc;
+ if (V == 1 ||
+ (decode_field & 0b10111) == LD_UNPR_UNALLOC_1 ||
+ (decode_field & 0b11111) == LD_UNPR_UNALLOC_2) {
+ return arm_decode_unknown(instr, type, immediate, op);
+ }
+#undef LD_UNPR_UNALLOC_1
+#undef LD_UNPR_UNALLOC_2
+
+ if (rn != CFI_SP) {
+ *type = INSN_OTHER;
+ return 0;
+ }
+ *type = INSN_STACK;
+
+ switch (decode_field) {
+ case 1:
+ case 2:
+ case 3:
+ case 9:
+ case 10:
+ case 11:
+ case 17:
+ case 18:
+ case 25:
+ /* load */
+ op->src.type = OP_SRC_REG_INDIRECT;
+ op->src.reg = CFI_SP;
+ op->src.offset = SIGN_EXTEND(imm9, 9);
+ op->dest.type = OP_DEST_REG;
+ op->dest.reg = rt;
+ op->dest.offset = 0;
+ break;
+ default:
+ /* store */
+ op->dest.type = OP_DEST_REG_INDIRECT;
+ op->dest.reg = CFI_SP;
+ op->dest.offset = SIGN_EXTEND(imm9, 9);
+ op->src.type = OP_DEST_REG;
+ op->src.reg = rt;
+ op->src.offset = 0;
+ break;
+ }
+ return 0;
+}
+
+static struct aarch64_insn_decoder atom_unallocs_decoder[] = {
+ {
+ .mask = 0b1001111,
+ .value = 0b0001001,
+ },
+ {
+ .mask = 0b1001110,
+ .value = 0b0001010,
+ },
+ {
+ .mask = 0b1001111,
+ .value = 0b0001101,
+ },
+ {
+ .mask = 0b1001110,
+ .value = 0b0001110,
+ },
+ {
+ .mask = 0b1101111,
+ .value = 0b0001100,
+ },
+ {
+ .mask = 0b1111111,
+ .value = 0b0111100,
+ },
+ {
+ .mask = 0b1000000,
+ .value = 0b1000000,
+ },
+};
+
+int arm_decode_atomic(u32 instr, unsigned char *type,
+ unsigned long *immediate,
+ struct stack_op *op)
+{
+ unsigned char V = 0, A = 0, R = 0, o3 = 0, opc = 0;
+ unsigned char rn = 0, rt = 0;
+ unsigned char decode_field = 0;
+ int i = 0;
+
+ V = EXTRACT_BIT(instr, 26);
+ A = EXTRACT_BIT(instr, 23);
+ R = EXTRACT_BIT(instr, 22);
+ o3 = EXTRACT_BIT(instr, 15);
+ opc = (instr >> 12) & ONES(3);
+
+ decode_field = (V << 6) | (A << 5) | (R << 4) | (o3 << 3) | opc;
+
+ for (i = 0; i < ARRAY_SIZE(atom_unallocs_decoder); i++) {
+ if ((decode_field & atom_unallocs_decoder[i].mask) ==
+ atom_unallocs_decoder[i].value) {
+ return arm_decode_unknown(instr,
+ type,
+ immediate,
+ op);
+ }
+ }
+
+ rn = (instr >> 5) & ONES(5);
+ rt = instr & ONES(5);
+
+ if (rn != CFI_SP) {
+ *type = INSN_OTHER;
+ return 0;
+ }
+ *type = INSN_STACK;
+ op->src.reg = CFI_SP;
+ op->src.type = OP_DEST_REG_INDIRECT;
+ op->src.offset = 0;
+ op->dest.type = OP_DEST_REG;
+ op->dest.reg = rt;
+ op->dest.offset = 0;
+
+ return 0;
+}
+
+int arm_decode_ld_st_regs_off(u32 instr, unsigned char *type,
+ unsigned long *immediate, struct stack_op *op)
+{
+ unsigned char size = 0, V = 0, opc = 0, option = 0;
+ unsigned char rm = 0, rn = 0, rt = 0;
+ unsigned char decode_field = 0;
+
+ size = (instr >> 30) & ONES(2);
+ V = EXTRACT_BIT(instr, 26);
+ opc = (instr >> 22) & ONES(2);
+ option = (instr >> 13) & ONES(3);
+
+#define LD_ROFF_UNALLOC_1 0b01110
+#define LD_ROFF_UNALLOC_2 0b10110
+#define LD_ROFF_UNALLOC_3 0b10011
+ decode_field = (size << 3) | (V << 2) | opc;
+ if (!EXTRACT_BIT(option, 1) ||
+ (decode_field & LD_ROFF_UNALLOC_1) == LD_ROFF_UNALLOC_1 ||
+ (decode_field & LD_ROFF_UNALLOC_2) == LD_ROFF_UNALLOC_2 ||
+ (decode_field & 0b10111) == LD_ROFF_UNALLOC_3) {
+ return arm_decode_unknown(instr, type, immediate, op);
+ }
+#undef LD_ROFF_UNALLOC_1
+#undef LD_ROFF_UNALLOC_2
+#undef LD_ROFF_UNALLOC_3
+
+ rn = (instr >> 5) & ONES(5);
+
+#define LD_ROFF_PRFM 0b11010
+ if (rn != CFI_SP || decode_field == LD_ROFF_PRFM) {
+ *type = INSN_OTHER;
+ return 0;
+ }
+#undef LD_ROFF_PRFM
+
+ rt = instr & ONES(5);
+ rm = (instr >> 16) & ONES(5);
+
+ switch (decode_field & ONES(3)) {
+ case 0b001:
+ case 0b010:
+ case 0b011:
+ case 0b101:
+ case 0b111:
+ /* load */
+ op->src.type = OP_SRC_REG_INDIRECT;
+ op->src.reg = CFI_SP;
+ op->src.offset = rm;
+ op->dest.type = OP_DEST_REG;
+ op->dest.reg = rt;
+ op->dest.offset = 0;
+ break;
+ default:
+ /* store */
+ op->dest.type = OP_DEST_REG_INDIRECT;
+ op->dest.reg = CFI_SP;
+ op->dest.offset = rm;
+ op->src.type = OP_DEST_REG;
+ op->src.reg = rt;
+ op->src.offset = 0;
+ break;
+ }
+
+ return 0;
+}
+
+int arm_decode_ld_st_regs_pac(u32 instr, unsigned char *type,
+ unsigned long *immediate, struct stack_op *op)
+{
+ unsigned char size = 0, V = 0, W = 0, S = 0;
+ unsigned char rn = 0, rt = 0;
+ u32 imm9 = 0, s10 = 0;
+
+ size = (instr >> 30) & ONES(2);
+ V = EXTRACT_BIT(instr, 26);
+ W = EXTRACT_BIT(instr, 11);
+
+ if (size != 3 || V == 1)
+ return arm_decode_unknown(instr, type, immediate, op);
+
+ rn = (instr >> 5) & ONES(5);
+
+ if (rn != CFI_SP) {
+ *type = INSN_OTHER;
+ return 0;
+ }
+
+ S = EXTRACT_BIT(instr, 22);
+ s10 = (S << 9) | imm9;
+
+ op->dest.reg = rt;
+ op->dest.type = OP_DEST_REG;
+ op->dest.offset = 0;
+ op->src.offset = (SIGN_EXTEND(s10, 9) << 3);
+ if (W) { /* pre-indexed/writeback */
+ op->src.type = OP_SRC_POP;
+ op->src.reg = CFI_SP;
+ } else {
+ op->src.type = OP_SRC_REG_INDIRECT;
+ op->src.reg = CFI_SP;
+ }
+
+ return 0;
+}
+
+static struct aarch64_insn_decoder dp_reg_decoder[] = {
+ {
+ .mask = 0b111111000000,
+ .value = 0b010110000000,
+ .decode_func = arm_decode_dp_reg_2src,
+ },
+ {
+ .mask = 0b111111000000,
+ .value = 0b110110000000,
+ .decode_func = arm_decode_dp_reg_1src,
+ },
+ {
+ .mask = 0b011000000000,
+ .value = 0b000000000000,
+ .decode_func = arm_decode_dp_reg_logi,
+ },
+ {
+ .mask = 0b011001000000,
+ .value = 0b001000000000,
+ .decode_func = arm_decode_dp_reg_adds,
+ },
+ {
+ .mask = 0b011001000000,
+ .value = 0b001001000000,
+ .decode_func = arm_decode_dp_reg_adde,
+ },
+ {
+ .mask = 0b011111111111,
+ .value = 0b010000000000,
+ .decode_func = arm_decode_dp_reg_addc,
+ },
+ {
+ .mask = 0b011111011111,
+ .value = 0b010000000001,
+ .decode_func = arm_decode_dp_reg_rota,
+ },
+ {
+ .mask = 0b011111001111,
+ .value = 0b010000000010,
+ .decode_func = arm_decode_dp_reg_eval,
+ },
+ {
+ .mask = 0b011111000010,
+ .value = 0b010010000000,
+ .decode_func = arm_decode_dp_reg_cmpr,
+ },
+ {
+ .mask = 0b011111000010,
+ .value = 0b010010000010,
+ .decode_func = arm_decode_dp_reg_cmpi,
+ },
+ {
+ .mask = 0b011111000000,
+ .value = 0b010100000000,
+ .decode_func = arm_decode_dp_reg_csel,
+ },
+ {
+ .mask = 0b011000000000,
+ .value = 0b011000000000,
+ .decode_func = arm_decode_dp_reg_3src,
+ },
+};
+
+int arm_decode_dp_reg(u32 instr, unsigned char *type,
+ unsigned long *immediate, struct stack_op *op)
+{
+ unsigned char op0 = 0, op1 = 0, op2 = 0, op3 = 0;
+ u32 decode_field = 0;
+ int i = 0;
+
+ op0 = EXTRACT_BIT(instr, 30);
+ op1 = EXTRACT_BIT(instr, 28);
+ op2 = (instr >> 21) & ONES(4);
+ op3 = (instr >> 10) & ONES(6);
+ decode_field = (op0 << 5) | (op1 << 4) | op2;
+ decode_field = (decode_field << 6) | op3;
+
+ for (i = 0; i < ARRAY_SIZE(dp_reg_decoder); i++) {
+ if ((decode_field & dp_reg_decoder[i].mask) ==
+ dp_reg_decoder[i].value) {
+ return dp_reg_decoder[i].decode_func(instr, type,
+ immediate, op);
+ }
+ }
+ return arm_decode_unknown(instr, type, immediate, op);
+}
+
+static struct aarch64_insn_decoder dp_reg_2src_decoder[] = {
+ {
+ .mask = 0b00111111,
+ .value = 0b00000001,
+ },
+ {
+ .mask = 0b00111000,
+ .value = 0b00011000,
+ },
+ {
+ .mask = 0b00100000,
+ .value = 0b00100000,
+ },
+ {
+ .mask = 0b01111111,
+ .value = 0b00000101,
+ },
+ {
+ .mask = 0b01111100,
+ .value = 0b00001100,
+ },
+ {
+ .mask = 0b01111110,
+ .value = 0b01000010,
+ },
+ {
+ .mask = 0b01111100,
+ .value = 0b01000100,
+ },
+ {
+ .mask = 0b01111000,
+ .value = 0b01001000,
+ },
+ {
+ .mask = 0b01110000,
+ .value = 0b01010000,
+ },
+ {
+ .mask = 0b10111111,
+ .value = 0b00000000,
+ },
+ {
+ .mask = 0b11111111,
+ .value = 0b00000100,
+ },
+ {
+ .mask = 0b11111110,
+ .value = 0b00000110,
+ },
+ {
+ .mask = 0b11111011,
+ .value = 0b00010011,
+ },
+ {
+ .mask = 0b11111001,
+ .value = 0b10010000,
+ },
+ {
+ .mask = 0b11111010,
+ .value = 0b10010000,
+ },
+};
+
+static int dp_reg_2src_stack_fields[] = {
+ 0b10000000,
+ 0b10000100,
+ 0b10000101,
+ 0b10001100,
+ 0b11000000,
+};
+
+int arm_decode_dp_reg_2src(u32 instr, unsigned char *type,
+ unsigned long *immediate, struct stack_op *op)
+{
+ unsigned char sf = 0, S = 0, opcode = 0, rn = 0, rd = 0;
+ unsigned char decode_field = 0;
+ int i = 0;
+
+ sf = EXTRACT_BIT(instr, 31);
+ S = EXTRACT_BIT(instr, 29);
+ opcode = (instr >> 10) & ONES(6);
+
+ decode_field = (sf << 7) | (S << 6) | opcode;
+
+ for (i = 0; i < ARRAY_SIZE(dp_reg_2src_decoder); i++) {
+ if ((decode_field & dp_reg_2src_decoder[i].mask) ==
+ dp_reg_2src_decoder[i].value) {
+ return arm_decode_unknown(instr, type, immediate, op);
+ }
+ }
+
+ *type = 0;
+ for (i = 0; i < ARRAY_SIZE(dp_reg_2src_stack_fields); i++) {
+ if (opcode == dp_reg_2src_stack_fields[i]) {
+ *type = INSN_OTHER;
+ break;
+ }
+ }
+ if (*type == 0) {
+ *type = INSN_OTHER;
+ return 0;
+ }
+
+ rn = (instr >> 5) & ONES(5);
+ rd = instr & ONES(5);
+
+#define IRG_OPCODE 0b10000100
+ if ((rn != CFI_SP && opcode != IRG_OPCODE) ||
+ (opcode == IRG_OPCODE && rd != CFI_SP &&
+ rn != CFI_SP)) {
+ *type = INSN_OTHER;
+ return 0;
+ }
+#undef IRG_OPCODE
+
+ *type = INSN_STACK;
+ op->dest.reg = rd;
+ op->dest.type = OP_DEST_REG;
+ op->dest.offset = 0;
+
+ op->src.reg = rn;
+ op->src.type = OP_DEST_REG;
+ op->src.offset = 0;
+
+ return 0;
+}
+
+static struct aarch64_insn_decoder dp_reg_1src_decoder[] = {
+ {
+ .mask = 0b0000000001000,
+ .value = 0b0000000001000,
+ },
+ {
+ .mask = 0b0000000010000,
+ .value = 0b0000000010000,
+ },
+ {
+ .mask = 0b0000000100000,
+ .value = 0b0000000100000,
+ },
+ {
+ .mask = 0b0000001000000,
+ .value = 0b0000001000000,
+ },
+ {
+ .mask = 0b0000010000000,
+ .value = 0b0000010000000,
+ },
+ {
+ .mask = 0b0000100000000,
+ .value = 0b0000100000000,
+ },
+ {
+ .mask = 0b0001000000000,
+ .value = 0b0001000000000,
+ },
+ {
+ .mask = 0b0010000000000,
+ .value = 0b0010000000000,
+ },
+ {
+ .mask = 0b0111111111110,
+ .value = 0b0000000000110,
+ },
+ {
+ .mask = 0b0100000000000,
+ .value = 0b0100000000000,
+ },
+};
+
+int arm_decode_dp_reg_1src(u32 instr, unsigned char *type,
+ unsigned long *immediate, struct stack_op *op)
+{
+ unsigned char sf = 0, S = 0, opcode2 = 0, opcode = 0;
+ u32 decode_field = 0;
+ int i = 0;
+
+ sf = EXTRACT_BIT(instr, 31);
+ S = EXTRACT_BIT(instr, 29);
+ opcode2 = (instr >> 16) & ONES(5);
+ opcode = (instr >> 10) & ONES(6);
+
+ decode_field = (sf << 6) | (S << 5) | opcode2;
+ decode_field = (decode_field << 6) | opcode;
+
+ for (i = 0; i < ARRAY_SIZE(dp_reg_1src_decoder); i++) {
+ if ((decode_field & dp_reg_1src_decoder[i].mask) ==
+ dp_reg_1src_decoder[i].value) {
+ return arm_decode_unknown(instr, type, immediate, op);
+ }
+ }
+ *type = INSN_OTHER;
+ return 0;
+}
+
+int arm_decode_dp_reg_logi(u32 instr, unsigned char *type,
+ unsigned long *immediate, struct stack_op *op)
+{
+ unsigned char sf = 0, imm6 = 0;
+
+ sf = EXTRACT_BIT(instr, 31);
+ imm6 = (instr >> 10) & ONES(6);
+
+ if (imm6 >= 0b100000 && !sf)
+ return arm_decode_unknown(instr, type, immediate, op);
+
+ *type = INSN_OTHER;
+ return 0;
+}
+
+int arm_decode_dp_reg_adds(u32 instr, unsigned char *type,
+ unsigned long *immediate, struct stack_op *op)
+{
+ unsigned char sf = 0, shift = 0, imm6 = 0;
+
+ sf = EXTRACT_BIT(instr, 31);
+ shift = (instr >> 22) & ONES(2);
+ imm6 = (instr >> 10) & ONES(6);
+
+ if ((imm6 >= 0b100000 && !sf) || shift == 0b11)
+ return arm_decode_unknown(instr, type, immediate, op);
+
+ *type = INSN_OTHER;
+ return 0;
+}
+
+int arm_decode_dp_reg_adde(u32 instr, unsigned char *type,
+ unsigned long *immediate, struct stack_op *op)
+{
+ unsigned char S = 0, opt = 0, imm3 = 0, rn = 0, rd = 0;
+
+ S = EXTRACT_BIT(instr, 29);
+ opt = (instr >> 22) & ONES(2);
+ imm3 = (instr >> 10) & ONES(3);
+ rn = (instr >> 5) & ONES(5);
+ rd = instr & ONES(5);
+
+ if (opt != 0 || imm3 >= 0b101)
+ return arm_decode_unknown(instr, type, immediate, op);
+
+ if (rd == CFI_SP && S == 0) {
+ *type = INSN_STACK;
+ op->dest.reg = CFI_SP;
+ op->dest.type = OP_DEST_REG;
+ op->src.type = OP_SRC_ADD;
+ op->src.reg = rn;
+
+ return 0;
+ }
+ *type = INSN_OTHER;
+ return 0;
+}
+
+int arm_decode_dp_reg_addc(u32 instr, unsigned char *type,
+ unsigned long *immediate, struct stack_op *op)
+{
+ *type = INSN_OTHER;
+ return 0;
+}
+
+int arm_decode_dp_reg_rota(u32 instr, unsigned char *type,
+ unsigned long *immediate, struct stack_op *op)
+{
+ unsigned char sf = 0, S = 0, op_bit = 0, o2 = 0;
+ unsigned char decode_field = 0;
+
+ sf = EXTRACT_BIT(instr, 31);
+ op_bit = EXTRACT_BIT(instr, 30);
+ S = EXTRACT_BIT(instr, 29);
+ o2 = EXTRACT_BIT(instr, 4);
+
+ decode_field = (sf << 3) | (op_bit << 2) | (S << 1) | o2;
+
+ if (decode_field != 0b1010)
+ return arm_decode_unknown(instr, type, immediate, op);
+
+ *type = INSN_OTHER;
+ return 0;
+}
+
+int arm_decode_dp_reg_eval(u32 instr, unsigned char *type,
+ unsigned long *immediate, struct stack_op *op)
+{
+ unsigned char sf = 0, S = 0, op_bit = 0, o3 = 0, sz = 0;
+ unsigned char opcode2 = 0, mask = 0;
+ u32 decode_field = 0;
+
+ sf = EXTRACT_BIT(instr, 31);
+ op_bit = EXTRACT_BIT(instr, 30);
+ S = EXTRACT_BIT(instr, 29);
+ sz = EXTRACT_BIT(instr, 14);
+ o3 = EXTRACT_BIT(instr, 4);
+
+ opcode2 = (instr >> 15) & ONES(6);
+ mask = instr & ONES(4);
+
+ decode_field = (sf << 2) | (op_bit << 1) | S;
+ decode_field = (decode_field << 12) | (opcode2 << 6) | (sz << 5);
+ decode_field |= (o3 << 4) | mask;
+
+#define DP_EVAL_SETF_1 0b001000000001101
+#define DP_EVAL_SETF_2 0b001000000101101
+
+ if (decode_field != DP_EVAL_SETF_1 &&
+ decode_field != DP_EVAL_SETF_2) {
+ return arm_decode_unknown(instr, type, immediate, op);
+ }
+
+ *type = INSN_OTHER;
+ return 0;
+#undef DP_EVAL_SETF_1
+#undef DP_EVAL_SETF_2
+}
+
+int arm_decode_dp_reg_cmpr(u32 instr, unsigned char *type,
+ unsigned long *immediate, struct stack_op *op)
+{
+ unsigned char S = 0, o2 = 0, o3 = 0;
+
+ S = EXTRACT_BIT(instr, 29);
+ o2 = EXTRACT_BIT(instr, 10);
+ o3 = EXTRACT_BIT(instr, 4);
+
+ if (!S || o2 || o3)
+ return arm_decode_unknown(instr, type, immediate, op);
+
+ *type = INSN_OTHER;
+ return 0;
+}
+
+int arm_decode_dp_reg_csel(u32 instr, unsigned char *type,
+ unsigned long *immediate, struct stack_op *op)
+{
+ unsigned char S = 0, op2 = 0;
+
+ S = EXTRACT_BIT(instr, 29);
+ op2 = (instr >> 10) & ONES(2);
+
+ if (S || op2 >= 0b10)
+ return arm_decode_unknown(instr, type, immediate, op);
+
+ *type = INSN_OTHER;
+ return 0;
+}
+
+int arm_decode_dp_reg_cmpi(u32 instr, unsigned char *type,
+ unsigned long *immediate, struct stack_op *op)
+{
+ return arm_decode_dp_reg_cmpr(instr, type, immediate, op);
+}
+
+static int dp_reg_3src_fields[] = {
+};
+
+static struct aarch64_insn_decoder dp_reg_3src_decoder[] = {
+ {
+ .mask = 0b0111111,
+ .value = 0b0000101,
+ },
+ {
+ .mask = 0b0111110,
+ .value = 0b0000110,
+ },
+ {
+ .mask = 0b0111110,
+ .value = 0b0001000,
+ },
+ {
+ .mask = 0b0111111,
+ .value = 0b0001101,
+ },
+ {
+ .mask = 0b0111110,
+ .value = 0b0001110,
+ },
+ {
+ .mask = 0b0110000,
+ .value = 0b0010000,
+ },
+ {
+ .mask = 0b0100000,
+ .value = 0b0100000,
+ },
+ {
+ .mask = 0b1111111,
+ .value = 0b0000010,
+ },
+ {
+ .mask = 0b1111111,
+ .value = 0b0000011,
+ },
+ {
+ .mask = 0b1111111,
+ .value = 0b0000100,
+ },
+ {
+ .mask = 0b1111111,
+ .value = 0b0001010,
+ },
+ {
+ .mask = 0b1111111,
+ .value = 0b0001011,
+ },
+ {
+ .mask = 0b1111111,
+ .value = 0b0001100,
+ },
+};
+
+int arm_decode_dp_reg_3src(u32 instr, unsigned char *type,
+ unsigned long *immediate, struct stack_op *op)
+{
+ unsigned char sf = 0, op54 = 0, op31 = 0, o0 = 0;
+ unsigned char decode_field = 0;
+ int i = 0;
+
+ sf = EXTRACT_BIT(instr, 31);
+ op54 = (instr >> 29) & ONES(2);
+ op31 = (instr >> 21) & ONES(3);
+ o0 = EXTRACT_BIT(instr, 15);
+
+ decode_field = (sf << 6) | (op54 << 4) | (op31 << 1) | o0;
+
+ for (i = 0; i < ARRAY_SIZE(dp_reg_3src_fields); i++) {
+ if ((decode_field & dp_reg_3src_decoder[i].mask) ==
+ dp_reg_3src_decoder[i].value) {
+ return arm_decode_unknown(instr, type, immediate, op);
+ }
+ }
+
+ *type = INSN_OTHER;
+ return 0;
+}
+
+unsigned long arch_jump_destination(struct instruction *insn)
+{
+ return insn->offset + insn->immediate;
+}
+
+static struct aarch64_insn_decoder sve_enc_decoder[] = {
+ {
+ .mask = 0b1111010000111000,
+ .value = 0b0000010000011000,
+ },
+ {
+ .mask = 0b1111110000111000,
+ .value = 0b0001110000000000,
+ },
+ {
+ .mask = 0b1111010000110000,
+ .value = 0b0011010000010000,
+ },
+ {
+ .mask = 0b1111011100111000,
+ .value = 0b0011010100101000,
+ },
+ {
+ .mask = 0b1111011000110000,
+ .value = 0b0011011000100000,
+ },
+ {
+ .mask = 0b1111010000100000,
+ .value = 0b0100000000100000,
+ },
+ {
+ .mask = 0b1111000000000000,
+ .value = 0b0101000000000000,
+ },
+ {
+ .mask = 0b1111011111111000,
+ .value = 0b0110000000101000,
+ },
+ {
+ .mask = 0b1111011111110000,
+ .value = 0b0110000000110000,
+ },
+ {
+ .mask = 0b1111011111100000,
+ .value = 0b0110000001100000,
+ },
+ {
+ .mask = 0b1111011110100000,
+ .value = 0b0110000010100000,
+ },
+ {
+ .mask = 0b1111011100100000,
+ .value = 0b0110000100100000,
+ },
+ {
+ .mask = 0b1111011000100000,
+ .value = 0b0110001000100000,
+ },
+ {
+ .mask = 0b1111010000110110,
+ .value = 0b0110010000000010,
+ },
+ {
+ .mask = 0b1111010000111111,
+ .value = 0b0110010000001001,
+ },
+ {
+ .mask = 0b1111010000111100,
+ .value = 0b0110010000001100,
+ },
+ {
+ .mask = 0b1111010000110000,
+ .value = 0b0110010000010000,
+ },
+ {
+ .mask = 0b1111010000100000,
+ .value = 0b0110010000100000,
+ },
+ {
+ .mask = 0b1111011100111100,
+ .value = 0b0111000100001000,
+ },
+};
+
+/*
+ * Since these instructions are optional (not present on all arm processors)
+ * we consider that they will never be used to save/restore stack frame.
+ */
+int arm_decode_sve_encoding(u32 instr, unsigned char *type,
+ unsigned long *immediate, struct stack_op *op)
+{
+ int i = 0;
+ unsigned char op0 = 0, op1 = 0, op2 = 0, op3 = 0;
+ u32 decode_field = 0;
+
+ op0 = (instr >> 29) & ONES(3);
+ op1 = (instr >> 23) & ONES(2);
+ op2 = (instr >> 17) & ONES(5);
+ op3 = (instr >> 10) & ONES(6);
+
+ decode_field = (op0 << 2) | op1;
+ decode_field = (decode_field << 5) | op2;
+ decode_field = (decode_field << 6) | op3;
+
+ for (i = 0; i < ARRAY_SIZE(sve_enc_decoder); i++) {
+ if ((decode_field & sve_enc_decoder[i].mask) ==
+ sve_enc_decoder[i].value)
+ return arm_decode_unknown(instr, type, immediate, op);
+ }
+
+ *type = INSN_OTHER;
+
+ return 0;
+}
new file mode 100644
@@ -0,0 +1,36 @@
+/*
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+#ifndef _ARM64_ARCH_SPECIAL_H
+#define _ARM64_ARCH_SPECIAL_H
+
+#define EX_ENTRY_SIZE 8
+#define EX_ORIG_OFFSET 0
+#define EX_NEW_OFFSET 4
+
+#define JUMP_ENTRY_SIZE 16
+#define JUMP_ORIG_OFFSET 0
+#define JUMP_NEW_OFFSET 4
+
+#define ALT_ENTRY_SIZE 12
+#define ALT_ORIG_OFFSET 0
+#define ALT_NEW_OFFSET 4
+#define ALT_FEATURE_OFFSET 8
+#define ALT_ORIG_LEN_OFFSET 10
+#define ALT_NEW_LEN_OFFSET 11
+
+#define X86_FEATURE_POPCNT (4 * 32 + 23)
+#define X86_FEATURE_SMAP (9 * 32 + 20)
+
+#endif /* _ARM64_ARCH_SPECIAL_H */
new file mode 100644
@@ -0,0 +1,96 @@
+/*
+ * Copyright (C) 2017 Josh Poimboeuf <jpoimboe@redhat.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _ORC_TYPES_H
+#define _ORC_TYPES_H
+
+#include <linux/types.h>
+#include <linux/compiler.h>
+
+/*
+ * The ORC_REG_* registers are base registers which are used to find other
+ * registers on the stack.
+ *
+ * ORC_REG_PREV_SP, also known as DWARF Call Frame Address (CFA), is the
+ * address of the previous frame: the caller's SP before it called the current
+ * function.
+ *
+ * ORC_REG_UNDEFINED means the corresponding register's value didn't change in
+ * the current frame.
+ *
+ * The most commonly used base registers are SP and BP -- which the previous SP
+ * is usually based on -- and PREV_SP and UNDEFINED -- which the previous BP is
+ * usually based on.
+ *
+ * The rest of the base registers are needed for special cases like entry code
+ * and GCC realigned stacks.
+ */
+#define ORC_REG_UNDEFINED 0
+#define ORC_REG_PREV_SP 1
+#define ORC_REG_DX 2
+#define ORC_REG_DI 3
+#define ORC_REG_BP 4
+#define ORC_REG_SP 5
+#define ORC_REG_R10 6
+#define ORC_REG_R13 7
+#define ORC_REG_BP_INDIRECT 8
+#define ORC_REG_SP_INDIRECT 9
+#define ORC_REG_MAX 15
+
+/*
+ * ORC_TYPE_CALL: Indicates that sp_reg+sp_offset resolves to PREV_SP (the
+ * caller's SP right before it made the call). Used for all callable
+ * functions, i.e. all C code and all callable asm functions.
+ *
+ * ORC_TYPE_REGS: Used in entry code to indicate that sp_reg+sp_offset points
+ * to a fully populated pt_regs from a syscall, interrupt, or exception.
+ *
+ * ORC_TYPE_REGS_IRET: Used in entry code to indicate that sp_reg+sp_offset
+ * points to the iret return frame.
+ *
+ * The UNWIND_HINT macros are used only for the unwind_hint struct. They
+ * aren't used in struct orc_entry due to size and complexity constraints.
+ * Objtool converts them to real types when it converts the hints to orc
+ * entries.
+ */
+#define ORC_TYPE_CALL 0
+#define ORC_TYPE_REGS 1
+#define ORC_TYPE_REGS_IRET 2
+#define UNWIND_HINT_TYPE_SAVE 3
+#define UNWIND_HINT_TYPE_RESTORE 4
+
+#ifndef __ASSEMBLY__
+/*
+ * This struct is more or less a vastly simplified version of the DWARF Call
+ * Frame Information standard. It contains only the necessary parts of DWARF
+ * CFI, simplified for ease of access by the in-kernel unwinder. It tells the
+ * unwinder how to find the previous SP and BP (and sometimes entry regs) on
+ * the stack for a given code address. Each instance of the struct corresponds
+ * to one or more code locations.
+ */
+struct orc_entry {
+ s16 sp_offset;
+ s16 bp_offset;
+ unsigned sp_reg:4;
+ unsigned bp_reg:4;
+ unsigned type:2;
+ unsigned end:1;
+} __packed;
+
+#endif /* __ASSEMBLY__ */
+
+#endif /* _ORC_TYPES_H */
new file mode 100644
@@ -0,0 +1,24 @@
+#ifndef _BIT_OPERATIONS_H
+#define _BIT_OPERATIONS_H
+
+#include <stdint.h>
+#include <stdbool.h>
+#include <linux/types.h>
+
+#define ONES(N) (((__uint128_t)1 << (N)) - 1)
+#define ZERO_EXTEND(X, N) ((X) & ONES(N))
+#define EXTRACT_BIT(X, N) (((X) >> (N)) & ONES(1))
+#define SIGN_EXTEND(X, N) ((((unsigned long)-1 + (EXTRACT_BIT(X, (N) - 1) ^ 1)) << (N)) | X)
+
+u64 replicate(u64 x, int size, int n);
+
+u64 ror(u64 x, int size, int shift);
+
+int highest_set_bit(u32 x);
+
+__uint128_t decode_bit_masks(unsigned char N,
+ unsigned char imms,
+ unsigned char immr,
+ bool immediate);
+
+#endif /* _BIT_OPERATIONS_H */
new file mode 100644
@@ -0,0 +1,74 @@
+/*
+ * Copyright (C) 2015-2017 Josh Poimboeuf <jpoimboe@redhat.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _OBJTOOL_CFI_H
+#define _OBJTOOL_CFI_H
+
+#define CFI_UNDEFINED -1
+#define CFI_CFA -2
+#define CFI_SP_INDIRECT -3
+#define CFI_BP_INDIRECT -4
+
+#define CFI_R0 0
+#define CFI_R1 1
+#define CFI_R2 2
+#define CFI_R3 3
+#define CFI_R4 4
+#define CFI_R5 5
+#define CFI_R6 6
+#define CFI_R7 7
+#define CFI_R8 8
+#define CFI_R9 9
+#define CFI_R10 10
+#define CFI_R11 11
+#define CFI_R12 12
+#define CFI_R13 13
+#define CFI_R14 14
+#define CFI_R15 15
+#define CFI_R16 16
+#define CFI_R17 17
+#define CFI_R18 18
+#define CFI_R19 19
+#define CFI_R20 20
+#define CFI_R21 21
+#define CFI_R22 22
+#define CFI_R23 23
+#define CFI_R24 24
+#define CFI_R25 25
+#define CFI_R26 26
+#define CFI_R27 27
+#define CFI_R28 28
+#define CFI_R29 29
+#define CFI_FP CFI_R29
+#define CFI_BP CFI_FP
+#define CFI_R30 30
+#define CFI_LR CFI_R30
+#define CFI_SP 31
+
+#define CFI_NUM_REGS 32
+
+struct cfi_reg {
+ int base;
+ int offset;
+};
+
+struct cfi_state {
+ struct cfi_reg cfa;
+ struct cfi_reg regs[CFI_NUM_REGS];
+};
+
+#endif /* _OBJTOOL_CFI_H */
new file mode 100644
@@ -0,0 +1,211 @@
+/*
+ * Copyright (C) 2019 Raphael Gault <raphael.gault@arm.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _ARM_INSN_DECODE_H
+#define _ARM_INSN_DECODE_H
+
+#include "../../../arch.h"
+
+#define INSN_RESERVED 0b0000
+#define INSN_UNKNOWN 0b0001
+#define INSN_SVE_ENC 0b0010
+#define INSN_UNALLOC 0b0011
+#define INSN_DP_IMM 0b1001 //0x100x
+#define INSN_BRANCH 0b1011 //0x101x
+#define INSN_LD_ST_4 0b0100 //0bx1x0
+#define INSN_LD_ST_6 0b0110 //0bx1x0
+#define INSN_LD_ST_C 0b1100 //0bx1x0
+#define INSN_LD_ST_E 0b1110 //0bx1x0
+#define INSN_DP_REG_5 0b0101 //0bx101
+#define INSN_DP_REG_D 0b1101 //0bx101
+#define INSN_DP_SIMD_7 0b0111 //0bx111
+#define INSN_DP_SIMD_F 0b1111 //0bx111
+
+#define INSN_PCREL 0b001 //0b00x
+#define INSN_ADD_SUB 0b010
+#define INSN_ADD_TAG 0b011
+#define INSN_LOGICAL 0b100
+#define INSN_MOVE_WIDE 0b101
+#define INSN_BITFIELD 0b110
+#define INSN_EXTRACT 0b111
+
+#define INSN_BR_UNCOND_IMM_L 0b0001
+#define INSN_CP_BR_IMM_L 0b0010
+#define INSN_TST_BR_IMM_L 0b0011
+#define INSN_BR_COND_IMM 0b0100
+#define INSN_BR_UNKNOWN_IMM 0b0111
+#define INSN_BR_UNCOND_IMM_H 0b1001
+#define INSN_CP_BR_IMM_H 0b1010
+#define INSN_TST_BR_IMM_H 0b1011
+#define INSN_BR_SYS_NO_IMM 0b1101
+
+#define INSN_OP1_HINTS 0b01000000110010
+#define INSN_OP1_BARRIERS 0b01000000110011
+
+#define COMPOSED_INSN_REGS_NUM 2
+#define INSN_COMPOSED 1
+
+#define ADR_SOURCE -1
+
+typedef int (*arm_decode_class)(u32 instr, unsigned char *type,
+ unsigned long *immediate, struct stack_op *op);
+
+struct aarch64_insn_decoder {
+ u32 mask;
+ u32 value;
+ arm_decode_class decode_func;
+};
+
+/* arm64 instruction classes */
+int arm_decode_reserved(u32 instr, unsigned char *type,
+ unsigned long *immediate, struct stack_op *op);
+int arm_decode_sve_encoding(u32 instr, unsigned char *type,
+ unsigned long *immediate, struct stack_op *op);
+int arm_decode_dp_imm(u32 instr, unsigned char *type,
+ unsigned long *immediate, struct stack_op *op);
+int arm_decode_dp_reg(u32 instr, unsigned char *type,
+ unsigned long *immediate, struct stack_op *op);
+int arm_decode_br_sys(u32 instr, unsigned char *type,
+ unsigned long *immediate, struct stack_op *op);
+int arm_decode_ld_st(u32 instr, unsigned char *type,
+ unsigned long *immediate, struct stack_op *op);
+int arm_decode_dp_simd(u32 instr, unsigned char *type,
+ unsigned long *immediate, struct stack_op *op);
+int arm_decode_unknown(u32 instr, unsigned char *type,
+ unsigned long *immediate, struct stack_op *op);
+
+/* arm64 data processing -- immediate subclasses */
+int arm_decode_pcrel(u32 instr, unsigned char *type,
+ unsigned long *immediate, struct stack_op *op);
+int arm_decode_add_sub(u32 instr, unsigned char *type,
+ unsigned long *immediate, struct stack_op *op);
+int arm_decode_add_sub_tags(u32 instr, unsigned char *type,
+ unsigned long *immediate, struct stack_op *op);
+int arm_decode_logical(u32 instr, unsigned char *type,
+ unsigned long *immediate, struct stack_op *op);
+int arm_decode_move_wide(u32 instr, unsigned char *type,
+ unsigned long *immediate, struct stack_op *op);
+int arm_decode_bitfield(u32 instr, unsigned char *type,
+ unsigned long *immediate, struct stack_op *op);
+int arm_decode_extract(u32 instr, unsigned char *type,
+ unsigned long *immediate, struct stack_op *op);
+
+/* arm64 branch, exception generation, system insn subclasses */
+int arm_decode_br_uncond_imm(u32 instr, unsigned char *type,
+ unsigned long *immediate, struct stack_op *op);
+int arm_decode_br_comp_imm(u32 instr, unsigned char *type,
+ unsigned long *immediate, struct stack_op *op);
+int arm_decode_br_tst_imm(u32 instr, unsigned char *type,
+ unsigned long *immediate, struct stack_op *op);
+int arm_decode_br_cond_imm(u32 instr, unsigned char *type,
+ unsigned long *immediate, struct stack_op *op);
+
+int arm_decode_br_uncond_reg(u32 instr, unsigned char *type,
+ unsigned long *immediate, struct stack_op *op);
+
+int arm_decode_br_reg(u32 instr, unsigned char *type,
+ unsigned long *immediate, struct stack_op *op);
+int arm_decode_except_gen(u32 instr, unsigned char *type,
+ unsigned long *immediate, struct stack_op *op);
+int arm_decode_hints(u32 instr, unsigned char *type,
+ unsigned long *immediate, struct stack_op *op);
+int arm_decode_barriers(u32 instr, unsigned char *type,
+ unsigned long *immediate, struct stack_op *op);
+int arm_decode_pstate(u32 instr, unsigned char *type,
+ unsigned long *immediate, struct stack_op *op);
+int arm_decode_system_insn(u32 instr, unsigned char *type,
+ unsigned long *immediate, struct stack_op *op);
+int arm_decode_system_regs(u32 instr, unsigned char *type,
+ unsigned long *immediate, struct stack_op *op);
+
+/* arm64 load/store instructions */
+int arm_decode_adv_simd_mult(u32 instr, unsigned char *type,
+ unsigned long *immediate, struct stack_op *op);
+int arm_decode_adv_simd_mult_post(u32 instr, unsigned char *type,
+ unsigned long *immediate,
+ struct stack_op *op);
+int arm_decode_adv_simd_single(u32 instr, unsigned char *type,
+ unsigned long *immediate, struct stack_op *op);
+int arm_decode_adv_simd_single_post(u32 instr, unsigned char *type,
+ unsigned long *immediate,
+ struct stack_op *op);
+int arm_decode_ld_st_mem_tags(u32 instr, unsigned char *type,
+ unsigned long *immediate, struct stack_op *op);
+int arm_decode_ldapr_stlr_unsc_imm(u32 instr, unsigned char *type,
+ unsigned long *immediate,
+ struct stack_op *op);
+int arm_decode_ld_regs_literal(u32 instr, unsigned char *type,
+ unsigned long *immediate, struct stack_op *op);
+int arm_decode_ld_st_noalloc_pair_off(u32 instr, unsigned char *type,
+ unsigned long *immediate,
+ struct stack_op *op);
+int arm_decode_ld_st_regs_pair_post(u32 instr, unsigned char *type,
+ unsigned long *immediate,
+ struct stack_op *op);
+int arm_decode_ld_st_regs_pair_off(u32 instr, unsigned char *type,
+ unsigned long *immediate,
+ struct stack_op *op);
+int arm_decode_ld_st_regs_pair_pre(u32 instr, unsigned char *type,
+ unsigned long *immediate,
+ struct stack_op *op);
+int arm_decode_ld_st_regs_unsc_imm(u32 instr, unsigned char *type,
+ unsigned long *immediate,
+ struct stack_op *op);
+int arm_decode_ld_st_imm_post(u32 instr, unsigned char *type,
+ unsigned long *immediate, struct stack_op *op);
+int arm_decode_ld_st_imm_unpriv(u32 instr, unsigned char *type,
+ unsigned long *immediate, struct stack_op *op);
+int arm_decode_ld_st_imm_pre(u32 instr, unsigned char *type,
+ unsigned long *immediate, struct stack_op *op);
+int arm_decode_atomic(u32 instr, unsigned char *type,
+ unsigned long *immediate, struct stack_op *op);
+int arm_decode_ld_st_regs_off(u32 instr, unsigned char *type,
+ unsigned long *immediate, struct stack_op *op);
+int arm_decode_ld_st_regs_pac(u32 instr, unsigned char *type,
+ unsigned long *immediate, struct stack_op *op);
+int arm_decode_ld_st_regs_unsigned(u32 instr, unsigned char *type,
+ unsigned long *immediate,
+ struct stack_op *op);
+
+int arm_decode_ld_st_exclusive(u32 instr, unsigned char *type,
+ unsigned long *immediate, struct stack_op *op);
+
+/* arm64 data processing -- registers instructions */
+int arm_decode_dp_reg_1src(u32 instr, unsigned char *type,
+ unsigned long *immediate, struct stack_op *op);
+int arm_decode_dp_reg_2src(u32 instr, unsigned char *type,
+ unsigned long *immediate, struct stack_op *op);
+int arm_decode_dp_reg_3src(u32 instr, unsigned char *type,
+ unsigned long *immediate, struct stack_op *op);
+int arm_decode_dp_reg_adde(u32 instr, unsigned char *type,
+ unsigned long *immediate, struct stack_op *op);
+int arm_decode_dp_reg_cmpi(u32 instr, unsigned char *type,
+ unsigned long *immediate, struct stack_op *op);
+int arm_decode_dp_reg_eval(u32 instr, unsigned char *type,
+ unsigned long *immediate, struct stack_op *op);
+int arm_decode_dp_reg_cmpr(u32 instr, unsigned char *type,
+ unsigned long *immediate, struct stack_op *op);
+int arm_decode_dp_reg_rota(u32 instr, unsigned char *type,
+ unsigned long *immediate, struct stack_op *op);
+int arm_decode_dp_reg_csel(u32 instr, unsigned char *type,
+ unsigned long *immediate, struct stack_op *op);
+int arm_decode_dp_reg_addc(u32 instr, unsigned char *type,
+ unsigned long *immediate, struct stack_op *op);
+int arm_decode_dp_reg_adds(u32 instr, unsigned char *type,
+ unsigned long *immediate, struct stack_op *op);
+int arm_decode_dp_reg_logi(u32 instr, unsigned char *type,
+ unsigned long *immediate, struct stack_op *op);
+#endif /* _ARM_INSN_DECODE_H */
new file mode 100644
@@ -0,0 +1,26 @@
+/*
+ * Copyright (C) 2017 Josh Poimboeuf <jpoimboe@redhat.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <unistd.h>
+#include "../../orc.h"
+#include "../../warn.h"
+
+int orc_dump(const char *_objname)
+{
+ WARN("arm64 architecture does not yet support orc");
+ return -1;
+}
new file mode 100644
@@ -0,0 +1,40 @@
+/*
+ * Copyright (C) 2017 Josh Poimboeuf <jpoimboe@redhat.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdlib.h>
+#include <string.h>
+
+#include "../../orc.h"
+#include "../../check.h"
+#include "../../warn.h"
+
+int arch_create_orc(struct objtool_file *file)
+{
+ WARN("arm64 architecture does not yet support orc");
+ return -1;
+}
+
+int arch_create_orc_sections(struct objtool_file *file)
+{
+ WARN("arm64 architecture does not yet support orc");
+ return -1;
+}
+
+int arch_orc_read_unwind_hints(struct objtool_file *file)
+{
+ return 0;
+}
Provide implementation for the arch-dependent functions that are called by the main check function of objtool. The ORC unwinder is not yet supported by the arm64 architecture so we only provide a dummy interface for now. The decoding of the instruction is split into classes and subclasses as described into the Instruction Encoding in the ArmV8.5 Architecture Reference Manual. In order to handle the load/store instructions for a pair of registers we add an extra field to the stack_op structure. Signed-off-by: Raphael Gault <raphael.gault@arm.com> --- tools/objtool/arch.h | 7 + tools/objtool/arch/arm64/Build | 7 + tools/objtool/arch/arm64/bit_operations.c | 67 + tools/objtool/arch/arm64/decode.c | 2778 +++++++++++++++++ .../objtool/arch/arm64/include/arch_special.h | 36 + .../arch/arm64/include/asm/orc_types.h | 96 + .../arch/arm64/include/bit_operations.h | 24 + tools/objtool/arch/arm64/include/cfi.h | 74 + .../objtool/arch/arm64/include/insn_decode.h | 211 ++ tools/objtool/arch/arm64/orc_dump.c | 26 + tools/objtool/arch/arm64/orc_gen.c | 40 + 11 files changed, 3366 insertions(+) create mode 100644 tools/objtool/arch/arm64/Build create mode 100644 tools/objtool/arch/arm64/bit_operations.c create mode 100644 tools/objtool/arch/arm64/decode.c create mode 100644 tools/objtool/arch/arm64/include/arch_special.h create mode 100644 tools/objtool/arch/arm64/include/asm/orc_types.h create mode 100644 tools/objtool/arch/arm64/include/bit_operations.h create mode 100644 tools/objtool/arch/arm64/include/cfi.h create mode 100644 tools/objtool/arch/arm64/include/insn_decode.h create mode 100644 tools/objtool/arch/arm64/orc_dump.c create mode 100644 tools/objtool/arch/arm64/orc_gen.c