1*27b03b36SApple OSS Distributions /*
2*27b03b36SApple OSS Distributions * Copyright (c) 2017-2018 Apple Inc. All rights reserved.
3*27b03b36SApple OSS Distributions *
4*27b03b36SApple OSS Distributions * Disassemblers for ARM64 (AArch64)
5*27b03b36SApple OSS Distributions */
6*27b03b36SApple OSS Distributions
7*27b03b36SApple OSS Distributions #include <sys/fasttrap_isa.h>
8*27b03b36SApple OSS Distributions
9*27b03b36SApple OSS Distributions uint8_t dtrace_decode_arm64(uint32_t instr);
10*27b03b36SApple OSS Distributions
11*27b03b36SApple OSS Distributions struct arm64_decode_entry {
12*27b03b36SApple OSS Distributions uint32_t mask;
13*27b03b36SApple OSS Distributions uint32_t value;
14*27b03b36SApple OSS Distributions uint8_t type;
15*27b03b36SApple OSS Distributions };
16*27b03b36SApple OSS Distributions
17*27b03b36SApple OSS Distributions struct arm64_decode_entry arm64_decode_table[] = {
18*27b03b36SApple OSS Distributions { .mask = 0xFFFFFFFF, .value = FASTTRAP_ARM64_OP_VALUE_FUNC_ENTRY, .type = FASTTRAP_T_ARM64_STANDARD_FUNCTION_ENTRY },
19*27b03b36SApple OSS Distributions { .mask = FASTTRAP_ARM64_OP_MASK_LDR_S_PC_REL, .value = FASTTRAP_ARM64_OP_VALUE_LDR_S_PC_REL, .type = FASTTRAP_T_ARM64_LDR_S_PC_REL },
20*27b03b36SApple OSS Distributions { .mask = FASTTRAP_ARM64_OP_MASK_LDR_W_PC_REL, .value = FASTTRAP_ARM64_OP_VALUE_LDR_W_PC_REL, .type = FASTTRAP_T_ARM64_LDR_W_PC_REL },
21*27b03b36SApple OSS Distributions { .mask = FASTTRAP_ARM64_OP_MASK_LDR_D_PC_REL, .value = FASTTRAP_ARM64_OP_VALUE_LDR_D_PC_REL, .type = FASTTRAP_T_ARM64_LDR_D_PC_REL },
22*27b03b36SApple OSS Distributions { .mask = FASTTRAP_ARM64_OP_MASK_LDR_X_PC_REL, .value = FASTTRAP_ARM64_OP_VALUE_LDR_X_PC_REL, .type = FASTTRAP_T_ARM64_LDR_X_PC_REL },
23*27b03b36SApple OSS Distributions { .mask = FASTTRAP_ARM64_OP_MASK_LDR_Q_PC_REL, .value = FASTTRAP_ARM64_OP_VALUE_LDR_Q_PC_REL, .type = FASTTRAP_T_ARM64_LDR_Q_PC_REL },
24*27b03b36SApple OSS Distributions { .mask = FASTTRAP_ARM64_OP_MASK_LRDSW_PC_REL, .value = FASTTRAP_ARM64_OP_VALUE_LRDSW_PC_REL, .type = FASTTRAP_T_ARM64_LDRSW_PC_REL },
25*27b03b36SApple OSS Distributions { .mask = FASTTRAP_ARM64_OP_MASK_B_COND_PC_REL, .value = FASTTRAP_ARM64_OP_VALUE_B_COND_PC_REL, .type = FASTTRAP_T_ARM64_B_COND },
26*27b03b36SApple OSS Distributions { .mask = FASTTRAP_ARM64_OP_MASK_CBNZ_W_PC_REL, .value = FASTTRAP_ARM64_OP_VALUE_CBNZ_W_PC_REL, .type = FASTTRAP_T_ARM64_CBNZ_W },
27*27b03b36SApple OSS Distributions { .mask = FASTTRAP_ARM64_OP_MASK_CBNZ_X_PC_REL, .value = FASTTRAP_ARM64_OP_VALUE_CBNZ_X_PC_REL, .type = FASTTRAP_T_ARM64_CBNZ_X },
28*27b03b36SApple OSS Distributions { .mask = FASTTRAP_ARM64_OP_MASK_CBZ_W_PC_REL, .value = FASTTRAP_ARM64_OP_VALUE_CBZ_W_PC_REL, .type = FASTTRAP_T_ARM64_CBZ_W },
29*27b03b36SApple OSS Distributions { .mask = FASTTRAP_ARM64_OP_MASK_CBZ_X_PC_REL, .value = FASTTRAP_ARM64_OP_VALUE_CBZ_X_PC_REL, .type = FASTTRAP_T_ARM64_CBZ_X },
30*27b03b36SApple OSS Distributions { .mask = FASTTRAP_ARM64_OP_MASK_TBNZ_PC_REL, .value = FASTTRAP_ARM64_OP_VALUE_TBNZ_PC_REL, .type = FASTTRAP_T_ARM64_TBNZ },
31*27b03b36SApple OSS Distributions { .mask = FASTTRAP_ARM64_OP_MASK_TBZ_PC_REL, .value = FASTTRAP_ARM64_OP_VALUE_TBZ_PC_REL, .type = FASTTRAP_T_ARM64_TBZ },
32*27b03b36SApple OSS Distributions { .mask = FASTTRAP_ARM64_OP_MASK_B_PC_REL, .value = FASTTRAP_ARM64_OP_VALUE_B_PC_REL, .type = FASTTRAP_T_ARM64_B },
33*27b03b36SApple OSS Distributions { .mask = FASTTRAP_ARM64_OP_MASK_BL_PC_REL, .value = FASTTRAP_ARM64_OP_VALUE_BL_PC_REL, .type = FASTTRAP_T_ARM64_BL },
34*27b03b36SApple OSS Distributions { .mask = FASTTRAP_ARM64_OP_MASK_BLR, .value = FASTTRAP_ARM64_OP_VALUE_BLR, .type = FASTTRAP_T_ARM64_BLR },
35*27b03b36SApple OSS Distributions { .mask = FASTTRAP_ARM64_OP_MASK_BR, .value = FASTTRAP_ARM64_OP_VALUE_BR, .type = FASTTRAP_T_ARM64_BR },
36*27b03b36SApple OSS Distributions { .mask = FASTTRAP_ARM64_OP_MASK_RET, .value = FASTTRAP_ARM64_OP_VALUE_RET, .type = FASTTRAP_T_ARM64_RET },
37*27b03b36SApple OSS Distributions { .mask = FASTTRAP_ARM64_OP_MASK_ADRP, .value = FASTTRAP_ARM64_OP_VALUE_ADRP, .type = FASTTRAP_T_ARM64_ADRP },
38*27b03b36SApple OSS Distributions { .mask = FASTTRAP_ARM64_OP_MASK_ADR, .value = FASTTRAP_ARM64_OP_VALUE_ADR, .type = FASTTRAP_T_ARM64_ADR },
39*27b03b36SApple OSS Distributions { .mask = FASTTRAP_ARM64_OP_MASK_PRFM, .value = FASTTRAP_ARM64_OP_VALUE_PRFM, .type = FASTTRAP_T_ARM64_PRFM },
40*27b03b36SApple OSS Distributions { .mask = FASTTRAP_ARM64_OP_MASK_EXCL_MEM, .value = FASTTRAP_ARM64_OP_VALUE_EXCL_MEM, .type = FASTTRAP_T_ARM64_EXCLUSIVE_MEM },
41*27b03b36SApple OSS Distributions { .mask = FASTTRAP_ARM64_OP_MASK_RETAB, .value = FASTTRAP_ARM64_OP_VALUE_RETAB, .type = FASTTRAP_T_ARM64_RETAB }
42*27b03b36SApple OSS Distributions };
43*27b03b36SApple OSS Distributions
44*27b03b36SApple OSS Distributions #define NUM_DECODE_ENTRIES (sizeof(arm64_decode_table) / sizeof(struct arm64_decode_entry))
45*27b03b36SApple OSS Distributions
46*27b03b36SApple OSS Distributions uint8_t
dtrace_decode_arm64(uint32_t instr)47*27b03b36SApple OSS Distributions dtrace_decode_arm64(uint32_t instr)
48*27b03b36SApple OSS Distributions {
49*27b03b36SApple OSS Distributions unsigned i;
50*27b03b36SApple OSS Distributions
51*27b03b36SApple OSS Distributions for (i = 0; i < NUM_DECODE_ENTRIES; i++) {
52*27b03b36SApple OSS Distributions if ((instr & arm64_decode_table[i].mask) == arm64_decode_table[i].value) {
53*27b03b36SApple OSS Distributions return arm64_decode_table[i].type;
54*27b03b36SApple OSS Distributions }
55*27b03b36SApple OSS Distributions }
56*27b03b36SApple OSS Distributions
57*27b03b36SApple OSS Distributions return FASTTRAP_T_COMMON;
58*27b03b36SApple OSS Distributions }
59