#include "arm_disassembler.h"
#include <helper/log.h>
+#if HAVE_CAPSTONE
+#include <capstone/capstone.h>
+#endif
+
/*
* This disassembler supports two main functions for OpenOCD:
*
* the Cortex-M implementations).
*/
-/* textual represenation of the condition field
- * ALways (default) is ommitted (empty string) */
+/* textual representation of the condition field
+ * ALways (default) is omitted (empty string) */
static const char *arm_condition_strings[] = {
"EQ", "NE", "CS", "CC", "MI", "PL", "VS", "VC", "HI", "LS", "GE", "LT", "GT", "LE", "", "NV"
};
uint32_t address, struct arm_instruction *instruction)
{
/* PLD */
- if ((opcode & 0x0d70f000) == 0x0550f000) {
+ if ((opcode & 0x0d30f000) == 0x0510f000) {
+ uint8_t Rn;
+ uint8_t U;
+ unsigned offset;
+
instruction->type = ARM_PLD;
+ Rn = (opcode & 0xf0000) >> 16;
+ U = (opcode & 0x00800000) >> 23;
+ if (Rn == 0xf) {
+ /* literal */
+ offset = opcode & 0x0fff;
+ snprintf(instruction->text, 128,
+ "0x%8.8" PRIx32 "\t0x%8.8" PRIx32 "\tPLD %s%d",
+ address, opcode, U ? "" : "-", offset);
+ } else {
+ uint8_t I, R;
+
+ I = (opcode & 0x02000000) >> 25;
+ R = (opcode & 0x00400000) >> 22;
+
+ if (I) {
+ /* register PLD{W} [<Rn>,+/-<Rm>{, <shift>}] */
+ offset = (opcode & 0x0F80) >> 7;
+ uint8_t Rm;
+ Rm = opcode & 0xf;
+
+ if (offset == 0) {
+ /* No shift */
+ snprintf(instruction->text, 128,
+ "0x%8.8" PRIx32 "\t0x%8.8" PRIx32 "\tPLD%s [r%d, %sr%d]",
+ address, opcode, R ? "" : "W", Rn, U ? "" : "-", Rm);
+
+ } else {
+ uint8_t shift;
+ shift = (opcode & 0x60) >> 5;
+
+ if (shift == 0x0) {
+ /* LSL */
+ snprintf(instruction->text, 128,
+ "0x%8.8" PRIx32 "\t0x%8.8" PRIx32 "\tPLD%s [r%d, %sr%d, LSL #0x%x)",
+ address, opcode, R ? "" : "W", Rn, U ? "" : "-", Rm, offset);
+ } else if (shift == 0x1) {
+ /* LSR */
+ snprintf(instruction->text, 128,
+ "0x%8.8" PRIx32 "\t0x%8.8" PRIx32 "\tPLD%s [r%d, %sr%d, LSR #0x%x)",
+ address, opcode, R ? "" : "W", Rn, U ? "" : "-", Rm, offset);
+ } else if (shift == 0x2) {
+ /* ASR */
+ snprintf(instruction->text, 128,
+ "0x%8.8" PRIx32 "\t0x%8.8" PRIx32 "\tPLD%s [r%d, %sr%d, ASR #0x%x)",
+ address, opcode, R ? "" : "W", Rn, U ? "" : "-", Rm, offset);
+ } else if (shift == 0x3) {
+ /* ROR */
+ snprintf(instruction->text, 128,
+ "0x%8.8" PRIx32 "\t0x%8.8" PRIx32 "\tPLD%s [r%d, %sr%d, ROR #0x%x)",
+ address, opcode, R ? "" : "W", Rn, U ? "" : "-", Rm, offset);
+ }
+ }
+ } else {
+ /* immediate PLD{W} [<Rn>, #+/-<imm12>] */
+ offset = opcode & 0x0fff;
+ if (offset == 0) {
+ snprintf(instruction->text, 128,
+ "0x%8.8" PRIx32 "\t0x%8.8" PRIx32 "\tPLD%s [r%d]",
+ address, opcode, R ? "" : "W", Rn);
+ } else {
+ snprintf(instruction->text, 128,
+ "0x%8.8" PRIx32 "\t0x%8.8" PRIx32 "\tPLD%s [r%d, #%s%d]",
+ address, opcode, R ? "" : "W", Rn, U ? "" : "-", offset);
+ }
+ }
+ }
+ return ERROR_OK;
+ }
+ /* DSB */
+ if ((opcode & 0x07f000f0) == 0x05700040) {
+ instruction->type = ARM_DSB;
+
+ char *opt;
+ switch (opcode & 0x0000000f) {
+ case 0xf:
+ opt = "SY";
+ break;
+ case 0xe:
+ opt = "ST";
+ break;
+ case 0xb:
+ opt = "ISH";
+ break;
+ case 0xa:
+ opt = "ISHST";
+ break;
+ case 0x7:
+ opt = "NSH";
+ break;
+ case 0x6:
+ opt = "NSHST";
+ break;
+ case 0x3:
+ opt = "OSH";
+ break;
+ case 0x2:
+ opt = "OSHST";
+ break;
+ default:
+ opt = "UNK";
+ }
snprintf(instruction->text,
128,
- "0x%8.8" PRIx32 "\t0x%8.8" PRIx32 "\tPLD ...TODO...",
- address,
- opcode);
+ "0x%8.8" PRIx32 "\t0x%8.8" PRIx32 "\tDSB %s",
+ address, opcode, opt);
+
+ return ERROR_OK;
+ }
+ /* ISB */
+ if ((opcode & 0x07f000f0) == 0x05700060) {
+ instruction->type = ARM_ISB;
+
+ snprintf(instruction->text,
+ 128,
+ "0x%8.8" PRIx32 "\t0x%8.8" PRIx32 "\tISB %s",
+ address, opcode,
+ ((opcode & 0x0000000f) == 0xf) ? "SY" : "UNK");
return ERROR_OK;
}
}
/* SMLAW < y> */
- if (((opcode & 0x00600000) == 0x00100000) && (x == 0)) {
+ if (((opcode & 0x00600000) == 0x00200000) && (x == 0)) {
uint8_t Rd, Rm, Rs, Rn;
instruction->type = ARM_SMLAWy;
Rd = (opcode & 0xf0000) >> 16;
}
/* SMUL < x><y> */
- if ((opcode & 0x00600000) == 0x00300000) {
+ if ((opcode & 0x00600000) == 0x00600000) {
uint8_t Rd, Rm, Rs;
instruction->type = ARM_SMULxy;
Rd = (opcode & 0xf0000) >> 16;
}
/* SMULW < y> */
- if (((opcode & 0x00600000) == 0x00100000) && (x == 1)) {
+ if (((opcode & 0x00600000) == 0x00200000) && (x == 1)) {
uint8_t Rd, Rm, Rs;
instruction->type = ARM_SMULWy;
Rd = (opcode & 0xf0000) >> 16;
return ERROR_OK;
}
+static int evaluate_mov_imm(uint32_t opcode,
+ uint32_t address, struct arm_instruction *instruction)
+{
+ uint16_t immediate;
+ uint8_t Rd;
+ bool T;
+
+ Rd = (opcode & 0xf000) >> 12;
+ T = opcode & 0x00400000;
+ immediate = (opcode & 0xf0000) >> 4 | (opcode & 0xfff);
+
+ instruction->type = ARM_MOV;
+ instruction->info.data_proc.Rd = Rd;
+
+ snprintf(instruction->text,
+ 128,
+ "0x%8.8" PRIx32 "\t0x%8.8" PRIx32 "\tMOV%s%s r%i, #0x%" PRIx16,
+ address,
+ opcode,
+ T ? "T" : "W",
+ COND(opcode),
+ Rd,
+ immediate);
+
+ return ERROR_OK;
+}
+
static int evaluate_data_proc(uint32_t opcode,
uint32_t address, struct arm_instruction *instruction)
{
/* catch opcodes with [27:25] = b001 */
if ((opcode & 0x0e000000) == 0x02000000) {
- /* Undefined instruction */
- if ((opcode & 0x0fb00000) == 0x03000000) {
- instruction->type = ARM_UNDEFINED_INSTRUCTION;
- snprintf(instruction->text,
- 128,
- "0x%8.8" PRIx32 "\t0x%8.8" PRIx32 "\tUNDEFINED INSTRUCTION",
- address,
- opcode);
- return ERROR_OK;
- }
+ /* 16-bit immediate load */
+ if ((opcode & 0x0fb00000) == 0x03000000)
+ return evaluate_mov_imm(opcode, address, instruction);
/* Move immediate to status register */
if ((opcode & 0x0fb00000) == 0x03200000)
break;
/* BL/BLX prefix */
case 2:
- instruction->type = ARM_UNKNOWN_INSTUCTION;
+ instruction->type = ARM_UNKNOWN_INSTRUCTION;
mnemonic = "prefix";
target_address = offset << 12;
break;
address, opcode);
}
return ERROR_OK;
- break;
}
} else {
switch (op) {
instruction->type = ARM_STM;
mnemonic = "STM";
}
- snprintf(ptr_name, sizeof ptr_name, "r%i%s, ", Rn, wback);
+ snprintf(ptr_name, sizeof(ptr_name), "r%i%s, ", Rn, wback);
} else {/* push/pop */
Rn = 13;/* SP */
if (L) {
instruction->instruction_size = 2;
if ((opcode & 0xe000) == 0x0000) {
- /* add/substract register or immediate */
+ /* add/subtract register or immediate */
if ((opcode & 0x1800) == 0x1800)
return evaluate_add_sub_thumb(opcode, address, instruction);
/* shift by immediate */
return evaluate_shift_imm_thumb(opcode, address, instruction);
}
- /* Add/substract/compare/move immediate */
+ /* Add/subtract/compare/move immediate */
if ((opcode & 0xe000) == 0x2000)
return evaluate_data_proc_imm_thumb(opcode, address, instruction);
return -1;
}
-static int t2ev_b_bl(uint32_t opcode, uint32_t address,
- struct arm_instruction *instruction, char *cp)
+int arm_access_size(struct arm_instruction *instruction)
{
- unsigned offset;
- unsigned b21 = 1 << 21;
- unsigned b22 = 1 << 22;
-
- /* instead of combining two smaller 16-bit branch instructions,
- * Thumb2 uses only one larger 32-bit instruction.
- */
- offset = opcode & 0x7ff;
- offset |= (opcode & 0x03ff0000) >> 5;
- if (opcode & (1 << 26)) {
- offset |= 0xff << 23;
- if ((opcode & (1 << 11)) == 0)
- b21 = 0;
- if ((opcode & (1 << 13)) == 0)
- b22 = 0;
- } else {
- if (opcode & (1 << 11))
- b21 = 0;
- if (opcode & (1 << 13))
- b22 = 0;
+ if ((instruction->type == ARM_LDRB)
+ || (instruction->type == ARM_LDRBT)
+ || (instruction->type == ARM_LDRSB)
+ || (instruction->type == ARM_STRB)
+ || (instruction->type == ARM_STRBT))
+ return 1;
+ else if ((instruction->type == ARM_LDRH)
+ || (instruction->type == ARM_LDRSH)
+ || (instruction->type == ARM_STRH))
+ return 2;
+ else if ((instruction->type == ARM_LDR)
+ || (instruction->type == ARM_LDRT)
+ || (instruction->type == ARM_STR)
+ || (instruction->type == ARM_STRT))
+ return 4;
+ else if ((instruction->type == ARM_LDRD)
+ || (instruction->type == ARM_STRD))
+ return 8;
+ else {
+ LOG_ERROR("BUG: instruction type %i isn't a load/store instruction",
+ instruction->type);
+ return 0;
}
- offset |= b21;
- offset |= b22;
+}
+#if HAVE_CAPSTONE
+static void print_opcode(struct command_invocation *cmd, const cs_insn *insn)
+{
+ uint32_t opcode = 0;
- address += 4;
- address += offset << 1;
+ memcpy(&opcode, insn->bytes, insn->size);
- instruction->type = (opcode & (1 << 14)) ? ARM_BL : ARM_B;
- instruction->info.b_bl_bx_blx.reg_operand = -1;
- instruction->info.b_bl_bx_blx.target_address = address;
- sprintf(cp, "%s\t%#8.8" PRIx32,
- (opcode & (1 << 14)) ? "BL" : "B.W",
- address);
+ if (insn->size == 4) {
+ uint16_t opcode_high = opcode >> 16;
+ opcode = opcode & 0xffff;
- return ERROR_OK;
+ command_print(cmd, "0x%08" PRIx64" %04x %04x\t%s%s%s",
+ insn->address, opcode, opcode_high, insn->mnemonic,
+ insn->op_str[0] ? "\t" : "", insn->op_str);
+ } else {
+ command_print(cmd, "0x%08" PRIx64" %04x\t%s%s%s",
+ insn->address, opcode, insn->mnemonic,
+ insn->op_str[0] ? "\t" : "", insn->op_str);
+ }
}
-static int t2ev_cond_b(uint32_t opcode, uint32_t address,
- struct arm_instruction *instruction, char *cp)
+int arm_disassemble(struct command_invocation *cmd, struct target *target,
+ target_addr_t address, size_t count, bool thumb_mode)
{
- unsigned offset;
- unsigned b17 = 1 << 17;
- unsigned b18 = 1 << 18;
- unsigned cond = (opcode >> 22) & 0x0f;
-
- offset = opcode & 0x7ff;
- offset |= (opcode & 0x003f0000) >> 5;
- if (opcode & (1 << 26)) {
- offset |= 0x1fff << 19;
- if ((opcode & (1 << 11)) == 0)
- b17 = 0;
- if ((opcode & (1 << 13)) == 0)
- b18 = 0;
- } else {
- if (opcode & (1 << 11))
- b17 = 0;
- if (opcode & (1 << 13))
- b18 = 0;
- }
- offset |= b17;
- offset |= b18;
+ csh handle;
+ int ret;
+ cs_insn *insn;
+ cs_mode mode;
- address += 4;
- address += offset << 1;
+ if (!cs_support(CS_ARCH_ARM)) {
+ LOG_ERROR("ARM architecture not supported by capstone");
+ return ERROR_FAIL;
+ }
- instruction->type = ARM_B;
- instruction->info.b_bl_bx_blx.reg_operand = -1;
- instruction->info.b_bl_bx_blx.target_address = address;
- sprintf(cp, "B%s.W\t%#8.8" PRIx32,
- arm_condition_strings[cond],
- address);
+ mode = CS_MODE_LITTLE_ENDIAN;
- return ERROR_OK;
-}
+ if (thumb_mode)
+ mode |= CS_MODE_THUMB;
-static const char *special_name(int number)
-{
- char *special = "(RESERVED)";
+ ret = cs_open(CS_ARCH_ARM, mode, &handle);
- switch (number) {
- case 0:
- special = "apsr";
- break;
- case 1:
- special = "iapsr";
- break;
- case 2:
- special = "eapsr";
- break;
- case 3:
- special = "xpsr";
- break;
- case 5:
- special = "ipsr";
- break;
- case 6:
- special = "epsr";
- break;
- case 7:
- special = "iepsr";
- break;
- case 8:
- special = "msp";
- break;
- case 9:
- special = "psp";
- break;
- case 16:
- special = "primask";
- break;
- case 17:
- special = "basepri";
- break;
- case 18:
- special = "basepri_max";
- break;
- case 19:
- special = "faultmask";
- break;
- case 20:
- special = "control";
- break;
+ if (ret != CS_ERR_OK) {
+ LOG_ERROR("cs_open() failed: %s", cs_strerror(ret));
+ return ERROR_FAIL;
}
- return special;
-}
-static int t2ev_hint(uint32_t opcode, uint32_t address,
- struct arm_instruction *instruction, char *cp)
-{
- const char *mnemonic;
+ ret = cs_option(handle, CS_OPT_SKIPDATA, CS_OPT_ON);
- if (opcode & 0x0700) {
- instruction->type = ARM_UNDEFINED_INSTRUCTION;
- strcpy(cp, "UNDEFINED");
- return ERROR_OK;
+ if (ret != CS_ERR_OK) {
+ LOG_ERROR("cs_option() failed: %s", cs_strerror(ret));
+ cs_close(&handle);
+ return ERROR_FAIL;
}
- if (opcode & 0x00f0) {
- sprintf(cp, "DBG\t#%d", (int) opcode & 0xf);
- return ERROR_OK;
- }
+ insn = cs_malloc(handle);
- switch (opcode & 0x0f) {
- case 0:
- mnemonic = "NOP.W";
- break;
- case 1:
- mnemonic = "YIELD.W";
- break;
- case 2:
- mnemonic = "WFE.W";
- break;
- case 3:
- mnemonic = "WFI.W";
- break;
- case 4:
- mnemonic = "SEV.W";
- break;
- default:
- mnemonic = "HINT.W (UNRECOGNIZED)";
- break;
+ if (!insn) {
+ LOG_ERROR("cs_malloc() failed\n");
+ cs_close(&handle);
+ return ERROR_FAIL;
}
- strcpy(cp, mnemonic);
- return ERROR_OK;
-}
-static int t2ev_misc(uint32_t opcode, uint32_t address,
- struct arm_instruction *instruction, char *cp)
-{
- const char *mnemonic;
+ while (count > 0) {
+ uint8_t buffer[4];
- switch ((opcode >> 4) & 0x0f) {
- case 0:
- mnemonic = "LEAVEX";
- break;
- case 1:
- mnemonic = "ENTERX";
- break;
- case 2:
- mnemonic = "CLREX";
- break;
- case 4:
- mnemonic = "DSB";
- break;
- case 5:
- mnemonic = "DMB";
- break;
- case 6:
- mnemonic = "ISB";
- break;
- default:
- return ERROR_COMMAND_SYNTAX_ERROR;
- }
- strcpy(cp, mnemonic);
- return ERROR_OK;
-}
+ ret = target_read_buffer(target, address, sizeof(buffer), buffer);
-static int t2ev_b_misc(uint32_t opcode, uint32_t address,
- struct arm_instruction *instruction, char *cp)
-{
- /* permanently undefined */
- if ((opcode & 0x07f07000) == 0x07f02000) {
- instruction->type = ARM_UNDEFINED_INSTRUCTION;
- strcpy(cp, "UNDEFINED");
- return ERROR_OK;
- }
+ if (ret != ERROR_OK) {
+ cs_free(insn, 1);
+ cs_close(&handle);
+ return ret;
+ }
- switch ((opcode >> 12) & 0x5) {
- case 0x1:
- case 0x5:
- return t2ev_b_bl(opcode, address, instruction, cp);
- case 0x4:
- goto undef;
- case 0:
- if (((opcode >> 23) & 0x07) != 0x07)
- return t2ev_cond_b(opcode, address, instruction, cp);
- if (opcode & (1 << 26))
- goto undef;
- break;
- }
+ size_t size = sizeof(buffer);
+ const uint8_t *tmp = buffer;
- switch ((opcode >> 20) & 0x7f) {
- case 0x38:
- case 0x39:
- sprintf(cp, "MSR\t%s, r%d", special_name(opcode & 0xff),
- (int) (opcode >> 16) & 0x0f);
- return ERROR_OK;
- case 0x3a:
- return t2ev_hint(opcode, address, instruction, cp);
- case 0x3b:
- return t2ev_misc(opcode, address, instruction, cp);
- case 0x3c:
- sprintf(cp, "BXJ\tr%d", (int) (opcode >> 16) & 0x0f);
- return ERROR_OK;
- case 0x3e:
- case 0x3f:
- sprintf(cp, "MRS\tr%d, %s", (int) (opcode >> 8) & 0x0f,
- special_name(opcode & 0xff));
- return ERROR_OK;
- }
+ ret = cs_disasm_iter(handle, &tmp, &size, &address, insn);
-undef:
- return ERROR_COMMAND_SYNTAX_ERROR;
-}
+ if (!ret) {
+ LOG_ERROR("cs_disasm_iter() failed: %s",
+ cs_strerror(cs_errno(handle)));
+ cs_free(insn, 1);
+ cs_close(&handle);
+ return ERROR_FAIL;
+ }
-static int t2ev_data_mod_immed(uint32_t opcode, uint32_t address,
- struct arm_instruction *instruction, char *cp)
-{
- char *mnemonic = NULL;
- int rn = (opcode >> 16) & 0xf;
- int rd = (opcode >> 8) & 0xf;
- unsigned immed = opcode & 0xff;
- unsigned func;
- bool one = false;
- char *suffix = "";
- char *suffix2 = "";
-
- /* ARMv7-M: A5.3.2 Modified immediate constants */
- func = (opcode >> 11) & 0x0e;
- if (immed & 0x80)
- func |= 1;
- if (opcode & (1 << 26))
- func |= 0x10;
-
- /* "Modified" immediates */
- switch (func >> 1) {
- case 0:
- break;
- case 2:
- immed <<= 8;
- /* FALLTHROUGH */
- case 1:
- immed += immed << 16;
- break;
- case 3:
- immed += immed << 8;
- immed += immed << 16;
- break;
- default:
- immed |= 0x80;
- immed = ror(immed, func);
+ print_opcode(cmd, insn);
+ count--;
}
- if (opcode & (1 << 20))
- suffix = "S";
+ cs_free(insn, 1);
+ cs_close(&handle);
- switch ((opcode >> 21) & 0xf) {
- case 0:
- if (rd == 0xf) {
- instruction->type = ARM_TST;
- mnemonic = "TST";
- one = true;
- suffix = "";
- rd = rn;
- } else {
- instruction->type = ARM_AND;
- mnemonic = "AND";
- }
- break;
- case 1:
- instruction->type = ARM_BIC;
- mnemonic = "BIC";
- break;
- case 2:
- if (rn == 0xf) {
- instruction->type = ARM_MOV;
- mnemonic = "MOV";
- one = true;
- suffix2 = ".W";
- } else {
- instruction->type = ARM_ORR;
- mnemonic = "ORR";
- }
- break;
- case 3:
- if (rn == 0xf) {
- instruction->type = ARM_MVN;
- mnemonic = "MVN";
- one = true;
- } else {
- /* instruction->type = ARM_ORN; */
- mnemonic = "ORN";
- }
- break;
- case 4:
- if (rd == 0xf) {
- instruction->type = ARM_TEQ;
- mnemonic = "TEQ";
- one = true;
- suffix = "";
- rd = rn;
- } else {
- instruction->type = ARM_EOR;
- mnemonic = "EOR";
- }
- break;
- case 8:
- if (rd == 0xf) {
- instruction->type = ARM_CMN;
- mnemonic = "CMN";
- one = true;
- suffix = "";
- rd = rn;
- } else {
- instruction->type = ARM_ADD;
- mnemonic = "ADD";
- suffix2 = ".W";
- }
- break;
- case 10:
- instruction->type = ARM_ADC;
- mnemonic = "ADC";
- suffix2 = ".W";
- break;
- case 11:
- instruction->type = ARM_SBC;
- mnemonic = "SBC";
- break;
- case 13:
- if (rd == 0xf) {
- instruction->type = ARM_CMP;
- mnemonic = "CMP";
- one = true;
- suffix = "";
- rd = rn;
- } else {
- instruction->type = ARM_SUB;
- mnemonic = "SUB";
- }
- suffix2 = ".W";
- break;
- case 14:
- instruction->type = ARM_RSB;
- mnemonic = "RSB";
- suffix2 = ".W";
- break;
- default:
- return ERROR_COMMAND_SYNTAX_ERROR;
- }
-
- if (one)
- sprintf(cp, "%s%s\tr%d, #%d\t; %#8.8x",
- mnemonic, suffix2, rd, immed, immed);
- else
- sprintf(cp, "%s%s%s\tr%d, r%d, #%d\t; %#8.8x",
- mnemonic, suffix, suffix2,
- rd, rn, immed, immed);
-
- return ERROR_OK;
-}
-
-static int t2ev_data_immed(uint32_t opcode, uint32_t address,
- struct arm_instruction *instruction, char *cp)
-{
- char *mnemonic = NULL;
- int rn = (opcode >> 16) & 0xf;
- int rd = (opcode >> 8) & 0xf;
- unsigned immed;
- bool add = false;
- bool is_signed = false;
-
- immed = (opcode & 0x0ff) | ((opcode & 0x7000) >> 4);
- if (opcode & (1 << 26))
- immed |= (1 << 11);
-
- switch ((opcode >> 20) & 0x1f) {
- case 0:
- if (rn == 0xf) {
- add = true;
- goto do_adr;
- }
- mnemonic = "ADDW";
- break;
- case 4:
- immed |= (opcode >> 4) & 0xf000;
- sprintf(cp, "MOVW\tr%d, #%d\t; %#3.3x", rd, immed, immed);
- return ERROR_OK;
- case 0x0a:
- if (rn == 0xf)
- goto do_adr;
- mnemonic = "SUBW";
- break;
- case 0x0c:
- /* move constant to top 16 bits of register */
- immed |= (opcode >> 4) & 0xf000;
- sprintf(cp, "MOVT\tr%d, #%d\t; %#4.4x", rd, immed, immed);
- return ERROR_OK;
- case 0x10:
- case 0x12:
- is_signed = true;
- /* fallthrough */
- case 0x18:
- case 0x1a:
- /* signed/unsigned saturated add */
- immed = (opcode >> 6) & 0x03;
- immed |= (opcode >> 10) & 0x1c;
- sprintf(cp, "%sSAT\tr%d, #%d, r%d, %s #%d\t",
- is_signed ? "S" : "U",
- rd, (int) (opcode & 0x1f) + is_signed, rn,
- (opcode & (1 << 21)) ? "ASR" : "LSL",
- immed ? immed : 32);
- return ERROR_OK;
- case 0x14:
- is_signed = true;
- /* FALLTHROUGH */
- case 0x1c:
- /* signed/unsigned bitfield extract */
- immed = (opcode >> 6) & 0x03;
- immed |= (opcode >> 10) & 0x1c;
- sprintf(cp, "%sBFX\tr%d, r%d, #%d, #%d\t",
- is_signed ? "S" : "U",
- rd, rn, immed,
- (int) (opcode & 0x1f) + 1);
- return ERROR_OK;
- case 0x16:
- immed = (opcode >> 6) & 0x03;
- immed |= (opcode >> 10) & 0x1c;
- if (rn == 0xf) /* bitfield clear */
- sprintf(cp, "BFC\tr%d, #%d, #%d\t",
- rd, immed,
- (int) (opcode & 0x1f) + 1 - immed);
- else /* bitfield insert */
- sprintf(cp, "BFI\tr%d, r%d, #%d, #%d\t",
- rd, rn, immed,
- (int) (opcode & 0x1f) + 1 - immed);
- return ERROR_OK;
- default:
- return ERROR_COMMAND_SYNTAX_ERROR;
- }
-
- sprintf(cp, "%s\tr%d, r%d, #%d\t; %#3.3x", mnemonic,
- rd, rn, immed, immed);
- return ERROR_OK;
-
-do_adr:
- address = thumb_alignpc4(address);
- if (add)
- address += immed;
- else
- address -= immed;
- /* REVISIT "ADD/SUB Rd, PC, #const ; 0x..." might be better;
- * not hiding the pc-relative stuff will sometimes be useful.
- */
- sprintf(cp, "ADR.W\tr%d, %#8.8" PRIx32, rd, address);
- return ERROR_OK;
-}
-
-static int t2ev_store_single(uint32_t opcode, uint32_t address,
- struct arm_instruction *instruction, char *cp)
-{
- unsigned op = (opcode >> 20) & 0xf;
- char *size = "";
- char *suffix = "";
- char *p1 = "";
- char *p2 = "]";
- unsigned immed;
- unsigned rn = (opcode >> 16) & 0x0f;
- unsigned rt = (opcode >> 12) & 0x0f;
-
- if (rn == 0xf)
- return ERROR_COMMAND_SYNTAX_ERROR;
-
- if (opcode & 0x0800)
- op |= 1;
- switch (op) {
- /* byte */
- case 0x8:
- case 0x9:
- size = "B";
- goto imm12;
- case 0x1:
- size = "B";
- goto imm8;
- case 0x0:
- size = "B";
- break;
- /* halfword */
- case 0xa:
- case 0xb:
- size = "H";
- goto imm12;
- case 0x3:
- size = "H";
- goto imm8;
- case 0x2:
- size = "H";
- break;
- /* word */
- case 0xc:
- case 0xd:
- goto imm12;
- case 0x5:
- goto imm8;
- case 0x4:
- break;
- /* error */
- default:
- return ERROR_COMMAND_SYNTAX_ERROR;
- }
-
- sprintf(cp, "STR%s.W\tr%d, [r%d, r%d, LSL #%d]",
- size, rt, rn, (int) opcode & 0x0f,
- (int) (opcode >> 4) & 0x03);
- return ERROR_OK;
-
-imm12:
- immed = opcode & 0x0fff;
- sprintf(cp, "STR%s.W\tr%d, [r%d, #%u]\t; %#3.3x",
- size, rt, rn, immed, immed);
- return ERROR_OK;
-
-imm8:
- immed = opcode & 0x00ff;
-
- switch (opcode & 0x700) {
- case 0x600:
- suffix = "T";
- break;
- case 0x000:
- case 0x200:
- return ERROR_COMMAND_SYNTAX_ERROR;
- }
-
- /* two indexed modes will write back rn */
- if (opcode & 0x100) {
- if (opcode & 0x400) /* pre-indexed */
- p2 = "]!";
- else { /* post-indexed */
- p1 = "]";
- p2 = "";
- }
- }
-
- sprintf(cp, "STR%s%s\tr%d, [r%d%s, #%s%u%s\t; %#2.2x",
- size, suffix, rt, rn, p1,
- (opcode & 0x200) ? "" : "-",
- immed, p2, immed);
- return ERROR_OK;
-}
-
-static int t2ev_mul32(uint32_t opcode, uint32_t address,
- struct arm_instruction *instruction, char *cp)
-{
- int ra = (opcode >> 12) & 0xf;
-
- switch (opcode & 0x007000f0) {
- case 0:
- if (ra == 0xf)
- sprintf(cp, "MUL\tr%d, r%d, r%d",
- (int) (opcode >> 8) & 0xf,
- (int) (opcode >> 16) & 0xf,
- (int) (opcode >> 0) & 0xf);
- else
- sprintf(cp, "MLA\tr%d, r%d, r%d, r%d",
- (int) (opcode >> 8) & 0xf,
- (int) (opcode >> 16) & 0xf,
- (int) (opcode >> 0) & 0xf, ra);
- break;
- case 0x10:
- sprintf(cp, "MLS\tr%d, r%d, r%d, r%d",
- (int) (opcode >> 8) & 0xf,
- (int) (opcode >> 16) & 0xf,
- (int) (opcode >> 0) & 0xf, ra);
- break;
- default:
- return ERROR_COMMAND_SYNTAX_ERROR;
- }
- return ERROR_OK;
-}
-
-static int t2ev_mul64_div(uint32_t opcode, uint32_t address,
- struct arm_instruction *instruction, char *cp)
-{
- int op = (opcode >> 4) & 0xf;
- char *infix = "MUL";
-
- op += (opcode >> 16) & 0x70;
- switch (op) {
- case 0x40:
- case 0x60:
- infix = "MLA";
- /* FALLTHROUGH */
- case 0:
- case 0x20:
- sprintf(cp, "%c%sL\tr%d, r%d, r%d, r%d",
- (op & 0x20) ? 'U' : 'S',
- infix,
- (int) (opcode >> 12) & 0xf,
- (int) (opcode >> 8) & 0xf,
- (int) (opcode >> 16) & 0xf,
- (int) (opcode >> 0) & 0xf);
- break;
- case 0x1f:
- case 0x3f:
- sprintf(cp, "%cDIV\tr%d, r%d, r%d",
- (op & 0x20) ? 'U' : 'S',
- (int) (opcode >> 8) & 0xf,
- (int) (opcode >> 16) & 0xf,
- (int) (opcode >> 0) & 0xf);
- break;
- default:
- return ERROR_COMMAND_SYNTAX_ERROR;
- }
-
- return ERROR_OK;
-}
-
-static int t2ev_ldm_stm(uint32_t opcode, uint32_t address,
- struct arm_instruction *instruction, char *cp)
-{
- int rn = (opcode >> 16) & 0xf;
- int op = (opcode >> 22) & 0x6;
- int t = (opcode >> 21) & 1;
- unsigned registers = opcode & 0xffff;
- char *mode = "";
-
- if (opcode & (1 << 20))
- op |= 1;
-
- switch (op) {
- case 0:
- mode = "DB";
- /* FALL THROUGH */
- case 6:
- sprintf(cp, "SRS%s\tsp%s, #%d", mode,
- t ? "!" : "",
- (unsigned) (opcode & 0x1f));
- return ERROR_OK;
- case 1:
- mode = "DB";
- /* FALL THROUGH */
- case 7:
- sprintf(cp, "RFE%s\tr%d%s", mode,
- (unsigned) ((opcode >> 16) & 0xf),
- t ? "!" : "");
- return ERROR_OK;
- case 2:
- sprintf(cp, "STM.W\tr%d%s, ", rn, t ? "!" : "");
- break;
- case 3:
- if (rn == 13 && t)
- sprintf(cp, "POP.W\t");
- else
- sprintf(cp, "LDM.W\tr%d%s, ", rn, t ? "!" : "");
- break;
- case 4:
- if (rn == 13 && t)
- sprintf(cp, "PUSH.W\t");
- else
- sprintf(cp, "STMDB\tr%d%s, ", rn, t ? "!" : "");
- break;
- case 5:
- sprintf(cp, "LDMDB.W\tr%d%s, ", rn, t ? "!" : "");
- break;
- default:
- return ERROR_COMMAND_SYNTAX_ERROR;
- }
-
- cp = strchr(cp, 0);
- *cp++ = '{';
- for (t = 0; registers; t++, registers >>= 1) {
- if ((registers & 1) == 0)
- continue;
- registers &= ~1;
- sprintf(cp, "r%d%s", t, registers ? ", " : "");
- cp = strchr(cp, 0);
- }
- *cp++ = '}';
- *cp++ = 0;
-
- return ERROR_OK;
-}
-
-/* load/store dual or exclusive, table branch */
-static int t2ev_ldrex_strex(uint32_t opcode, uint32_t address,
- struct arm_instruction *instruction, char *cp)
-{
- unsigned op1op2 = (opcode >> 20) & 0x3;
- unsigned op3 = (opcode >> 4) & 0xf;
- char *mnemonic;
- unsigned rn = (opcode >> 16) & 0xf;
- unsigned rt = (opcode >> 12) & 0xf;
- unsigned rd = (opcode >> 8) & 0xf;
- unsigned imm = opcode & 0xff;
- char *p1 = "";
- char *p2 = "]";
-
- op1op2 |= (opcode >> 21) & 0xc;
- switch (op1op2) {
- case 0:
- mnemonic = "STREX";
- goto strex;
- case 1:
- mnemonic = "LDREX";
- goto ldrex;
- case 2:
- case 6:
- case 8:
- case 10:
- case 12:
- case 14:
- mnemonic = "STRD";
- goto immediate;
- case 3:
- case 7:
- case 9:
- case 11:
- case 13:
- case 15:
- mnemonic = "LDRD";
- if (rn == 15)
- goto literal;
- else
- goto immediate;
- case 4:
- switch (op3) {
- case 4:
- mnemonic = "STREXB";
- break;
- case 5:
- mnemonic = "STREXH";
- break;
- default:
- return ERROR_COMMAND_SYNTAX_ERROR;
- }
- rd = opcode & 0xf;
- imm = 0;
- goto strex;
- case 5:
- switch (op3) {
- case 0:
- sprintf(cp, "TBB\t[r%u, r%u]", rn, imm & 0xf);
- return ERROR_OK;
- case 1:
- sprintf(cp, "TBH\t[r%u, r%u, LSL #1]", rn, imm & 0xf);
- return ERROR_OK;
- case 4:
- mnemonic = "LDREXB";
- break;
- case 5:
- mnemonic = "LDREXH";
- break;
- default:
- return ERROR_COMMAND_SYNTAX_ERROR;
- }
- imm = 0;
- goto ldrex;
- }
- return ERROR_COMMAND_SYNTAX_ERROR;
-
-strex:
- imm <<= 2;
- if (imm)
- sprintf(cp, "%s\tr%u, r%u, [r%u, #%u]\t; %#2.2x",
- mnemonic, rd, rt, rn, imm, imm);
- else
- sprintf(cp, "%s\tr%u, r%u, [r%u]",
- mnemonic, rd, rt, rn);
- return ERROR_OK;
-
-ldrex:
- imm <<= 2;
- if (imm)
- sprintf(cp, "%s\tr%u, [r%u, #%u]\t; %#2.2x",
- mnemonic, rt, rn, imm, imm);
- else
- sprintf(cp, "%s\tr%u, [r%u]",
- mnemonic, rt, rn);
return ERROR_OK;
-
-immediate:
- /* two indexed modes will write back rn */
- if (opcode & (1 << 21)) {
- if (opcode & (1 << 24)) /* pre-indexed */
- p2 = "]!";
- else { /* post-indexed */
- p1 = "]";
- p2 = "";
- }
- }
-
- imm <<= 2;
- sprintf(cp, "%s\tr%u, r%u, [r%u%s, #%s%u%s\t; %#2.2x",
- mnemonic, rt, rd, rn, p1,
- (opcode & (1 << 23)) ? "" : "-",
- imm, p2, imm);
- return ERROR_OK;
-
-literal:
- address = thumb_alignpc4(address);
- imm <<= 2;
- if (opcode & (1 << 23))
- address += imm;
- else
- address -= imm;
- sprintf(cp, "%s\tr%u, r%u, %#8.8" PRIx32,
- mnemonic, rt, rd, address);
- return ERROR_OK;
-}
-
-static int t2ev_data_shift(uint32_t opcode, uint32_t address,
- struct arm_instruction *instruction, char *cp)
-{
- int op = (opcode >> 21) & 0xf;
- int rd = (opcode >> 8) & 0xf;
- int rn = (opcode >> 16) & 0xf;
- int type = (opcode >> 4) & 0x3;
- int immed = (opcode >> 6) & 0x3;
- char *mnemonic;
- char *suffix = "";
-
- immed |= (opcode >> 10) & 0x1c;
- if (opcode & (1 << 20))
- suffix = "S";
-
- switch (op) {
- case 0:
- if (rd == 0xf) {
- if (!(opcode & (1 << 20)))
- return ERROR_COMMAND_SYNTAX_ERROR;
- instruction->type = ARM_TST;
- mnemonic = "TST";
- suffix = "";
- goto two;
- }
- instruction->type = ARM_AND;
- mnemonic = "AND";
- break;
- case 1:
- instruction->type = ARM_BIC;
- mnemonic = "BIC";
- break;
- case 2:
- if (rn == 0xf) {
- instruction->type = ARM_MOV;
- switch (type) {
- case 0:
- if (immed == 0) {
- sprintf(cp, "MOV%s.W\tr%d, r%d",
- suffix, rd,
- (int) (opcode & 0xf));
- return ERROR_OK;
- }
- mnemonic = "LSL";
- break;
- case 1:
- mnemonic = "LSR";
- break;
- case 2:
- mnemonic = "ASR";
- break;
- default:
- if (immed == 0) {
- sprintf(cp, "RRX%s\tr%d, r%d",
- suffix, rd,
- (int) (opcode & 0xf));
- return ERROR_OK;
- }
- mnemonic = "ROR";
- break;
- }
- goto immediate;
- } else {
- instruction->type = ARM_ORR;
- mnemonic = "ORR";
- }
- break;
- case 3:
- if (rn == 0xf) {
- instruction->type = ARM_MVN;
- mnemonic = "MVN";
- rn = rd;
- goto two;
- } else {
- /* instruction->type = ARM_ORN; */
- mnemonic = "ORN";
- }
- break;
- case 4:
- if (rd == 0xf) {
- if (!(opcode & (1 << 20)))
- return ERROR_COMMAND_SYNTAX_ERROR;
- instruction->type = ARM_TEQ;
- mnemonic = "TEQ";
- suffix = "";
- goto two;
- }
- instruction->type = ARM_EOR;
- mnemonic = "EOR";
- break;
- case 8:
- if (rd == 0xf) {
- if (!(opcode & (1 << 20)))
- return ERROR_COMMAND_SYNTAX_ERROR;
- instruction->type = ARM_CMN;
- mnemonic = "CMN";
- suffix = "";
- goto two;
- }
- instruction->type = ARM_ADD;
- mnemonic = "ADD";
- break;
- case 0xa:
- instruction->type = ARM_ADC;
- mnemonic = "ADC";
- break;
- case 0xb:
- instruction->type = ARM_SBC;
- mnemonic = "SBC";
- break;
- case 0xd:
- if (rd == 0xf) {
- if (!(opcode & (1 << 21)))
- return ERROR_COMMAND_SYNTAX_ERROR;
- instruction->type = ARM_CMP;
- mnemonic = "CMP";
- suffix = "";
- goto two;
- }
- instruction->type = ARM_SUB;
- mnemonic = "SUB";
- break;
- case 0xe:
- instruction->type = ARM_RSB;
- mnemonic = "RSB";
- break;
- default:
- return ERROR_COMMAND_SYNTAX_ERROR;
- }
-
- sprintf(cp, "%s%s.W\tr%d, r%d, r%d",
- mnemonic, suffix, rd, rn, (int) (opcode & 0xf));
-
-shift:
- cp = strchr(cp, 0);
-
- switch (type) {
- case 0:
- if (immed == 0)
- return ERROR_OK;
- suffix = "LSL";
- break;
- case 1:
- suffix = "LSR";
- if (immed == 32)
- immed = 0;
- break;
- case 2:
- suffix = "ASR";
- if (immed == 32)
- immed = 0;
- break;
- case 3:
- if (immed == 0) {
- strcpy(cp, ", RRX");
- return ERROR_OK;
- }
- suffix = "ROR";
- break;
- }
- sprintf(cp, ", %s #%d", suffix, immed ? immed : 32);
- return ERROR_OK;
-
-two:
- sprintf(cp, "%s%s.W\tr%d, r%d",
- mnemonic, suffix, rn, (int) (opcode & 0xf));
- goto shift;
-
-immediate:
- sprintf(cp, "%s%s.W\tr%d, r%d, #%d",
- mnemonic, suffix, rd,
- (int) (opcode & 0xf), immed ? immed : 32);
- return ERROR_OK;
-}
-
-static int t2ev_data_reg(uint32_t opcode, uint32_t address,
- struct arm_instruction *instruction, char *cp)
-{
- char *mnemonic;
- char *suffix = "";
-
- if (((opcode >> 4) & 0xf) == 0) {
- switch ((opcode >> 21) & 0x7) {
- case 0:
- mnemonic = "LSL";
- break;
- case 1:
- mnemonic = "LSR";
- break;
- case 2:
- mnemonic = "ASR";
- break;
- case 3:
- mnemonic = "ROR";
- break;
- default:
- return ERROR_COMMAND_SYNTAX_ERROR;
- }
-
- instruction->type = ARM_MOV;
- if (opcode & (1 << 20))
- suffix = "S";
- sprintf(cp, "%s%s.W\tr%d, r%d, r%d",
- mnemonic, suffix,
- (int) (opcode >> 8) & 0xf,
- (int) (opcode >> 16) & 0xf,
- (int) (opcode >> 0) & 0xf);
-
- } else if (opcode & (1 << 7)) {
- switch ((opcode >> 20) & 0xf) {
- case 0:
- case 1:
- case 4:
- case 5:
- switch ((opcode >> 4) & 0x3) {
- case 1:
- suffix = ", ROR #8";
- break;
- case 2:
- suffix = ", ROR #16";
- break;
- case 3:
- suffix = ", ROR #24";
- break;
- }
- sprintf(cp, "%cXT%c.W\tr%d, r%d%s",
- (opcode & (1 << 24)) ? 'U' : 'S',
- (opcode & (1 << 26)) ? 'B' : 'H',
- (int) (opcode >> 8) & 0xf,
- (int) (opcode >> 0) & 0xf,
- suffix);
- break;
- case 8:
- case 9:
- case 0xa:
- case 0xb:
- if (opcode & (1 << 6))
- return ERROR_COMMAND_SYNTAX_ERROR;
- if (((opcode >> 12) & 0xf) != 0xf)
- return ERROR_COMMAND_SYNTAX_ERROR;
- if (!(opcode & (1 << 20)))
- return ERROR_COMMAND_SYNTAX_ERROR;
-
- switch (((opcode >> 19) & 0x04)
- | ((opcode >> 4) & 0x3)) {
- case 0:
- mnemonic = "REV.W";
- break;
- case 1:
- mnemonic = "REV16.W";
- break;
- case 2:
- mnemonic = "RBIT";
- break;
- case 3:
- mnemonic = "REVSH.W";
- break;
- case 4:
- mnemonic = "CLZ";
- break;
- default:
- return ERROR_COMMAND_SYNTAX_ERROR;
- }
- sprintf(cp, "%s\tr%d, r%d",
- mnemonic,
- (int) (opcode >> 8) & 0xf,
- (int) (opcode >> 0) & 0xf);
- break;
- default:
- return ERROR_COMMAND_SYNTAX_ERROR;
- }
- }
-
- return ERROR_OK;
-}
-
-static int t2ev_load_word(uint32_t opcode, uint32_t address,
- struct arm_instruction *instruction, char *cp)
-{
- int rn = (opcode >> 16) & 0xf;
- int immed;
-
- instruction->type = ARM_LDR;
-
- if (rn == 0xf) {
- immed = opcode & 0x0fff;
- if ((opcode & (1 << 23)) == 0)
- immed = -immed;
- sprintf(cp, "LDR\tr%d, %#8.8" PRIx32,
- (int) (opcode >> 12) & 0xf,
- thumb_alignpc4(address) + immed);
- return ERROR_OK;
- }
-
- if (opcode & (1 << 23)) {
- immed = opcode & 0x0fff;
- sprintf(cp, "LDR.W\tr%d, [r%d, #%d]\t; %#3.3x",
- (int) (opcode >> 12) & 0xf,
- rn, immed, immed);
- return ERROR_OK;
- }
-
- if (!(opcode & (0x3f << 6))) {
- sprintf(cp, "LDR.W\tr%d, [r%d, r%d, LSL #%d]",
- (int) (opcode >> 12) & 0xf,
- rn,
- (int) (opcode >> 0) & 0xf,
- (int) (opcode >> 4) & 0x3);
- return ERROR_OK;
- }
-
-
- if (((opcode >> 8) & 0xf) == 0xe) {
- immed = opcode & 0x00ff;
-
- sprintf(cp, "LDRT\tr%d, [r%d, #%d]\t; %#2.2x",
- (int) (opcode >> 12) & 0xf,
- rn, immed, immed);
- return ERROR_OK;
- }
-
- if (((opcode >> 8) & 0xf) == 0xc || (opcode & 0x0900) == 0x0900) {
- char *p1 = "]", *p2 = "";
-
- if (!(opcode & 0x0500))
- return ERROR_COMMAND_SYNTAX_ERROR;
-
- immed = opcode & 0x00ff;
-
- /* two indexed modes will write back rn */
- if (opcode & 0x100) {
- if (opcode & 0x400) /* pre-indexed */
- p2 = "]!";
- else { /* post-indexed */
- p1 = "]";
- p2 = "";
- }
- }
-
- sprintf(cp, "LDR\tr%d, [r%d%s, #%s%u%s\t; %#2.2x",
- (int) (opcode >> 12) & 0xf,
- rn, p1,
- (opcode & 0x200) ? "" : "-",
- immed, p2, immed);
- return ERROR_OK;
- }
-
- return ERROR_COMMAND_SYNTAX_ERROR;
-}
-
-static int t2ev_load_byte_hints(uint32_t opcode, uint32_t address,
- struct arm_instruction *instruction, char *cp)
-{
- int rn = (opcode >> 16) & 0xf;
- int rt = (opcode >> 12) & 0xf;
- int op2 = (opcode >> 6) & 0x3f;
- unsigned immed;
- char *p1 = "", *p2 = "]";
- char *mnemonic;
-
- switch ((opcode >> 23) & 0x3) {
- case 0:
- if ((rn & rt) == 0xf) {
-pld_literal:
- immed = opcode & 0xfff;
- address = thumb_alignpc4(address);
- if (opcode & (1 << 23))
- address += immed;
- else
- address -= immed;
- sprintf(cp, "PLD\tr%d, %#8.8" PRIx32,
- rt, address);
- return ERROR_OK;
- }
- if (rn == 0x0f && rt != 0x0f) {
-ldrb_literal:
- immed = opcode & 0xfff;
- address = thumb_alignpc4(address);
- if (opcode & (1 << 23))
- address += immed;
- else
- address -= immed;
- sprintf(cp, "LDRB\tr%d, %#8.8" PRIx32,
- rt, address);
- return ERROR_OK;
- }
- if (rn == 0x0f)
- break;
- if ((op2 & 0x3c) == 0x38) {
- immed = opcode & 0xff;
- sprintf(cp, "LDRBT\tr%d, [r%d, #%d]\t; %#2.2x",
- rt, rn, immed, immed);
- return ERROR_OK;
- }
- if ((op2 & 0x3c) == 0x30) {
- if (rt == 0x0f) {
- immed = opcode & 0xff;
- immed = -immed;
-preload_immediate:
- p1 = (opcode & (1 << 21)) ? "W" : "";
- sprintf(cp, "PLD%s\t[r%d, #%d]\t; %#6.6x",
- p1, rn, immed, immed);
- return ERROR_OK;
- }
- mnemonic = "LDRB";
-ldrxb_immediate_t3:
- immed = opcode & 0xff;
- if (!(opcode & 0x200))
- immed = -immed;
-
- /* two indexed modes will write back rn */
- if (opcode & 0x100) {
- if (opcode & 0x400) /* pre-indexed */
- p2 = "]!";
- else { /* post-indexed */
- p1 = "]";
- p2 = "";
- }
- }
-ldrxb_immediate_t2:
- sprintf(cp, "%s\tr%d, [r%d%s, #%d%s\t; %#8.8x",
- mnemonic, rt, rn, p1,
- immed, p2, immed);
- return ERROR_OK;
- }
- if ((op2 & 0x24) == 0x24) {
- mnemonic = "LDRB";
- goto ldrxb_immediate_t3;
- }
- if (op2 == 0) {
- int rm = opcode & 0xf;
-
- if (rt == 0x0f)
- sprintf(cp, "PLD\t");
- else
- sprintf(cp, "LDRB.W\tr%d, ", rt);
- immed = (opcode >> 4) & 0x3;
- cp = strchr(cp, 0);
- sprintf(cp, "[r%d, r%d, LSL #%d]", rn, rm, immed);
- return ERROR_OK;
- }
- break;
- case 1:
- if ((rn & rt) == 0xf)
- goto pld_literal;
- if (rt == 0xf) {
- immed = opcode & 0xfff;
- goto preload_immediate;
- }
- if (rn == 0x0f)
- goto ldrb_literal;
- mnemonic = "LDRB.W";
- immed = opcode & 0xfff;
- goto ldrxb_immediate_t2;
- case 2:
- if ((rn & rt) == 0xf) {
- immed = opcode & 0xfff;
- address = thumb_alignpc4(address);
- if (opcode & (1 << 23))
- address += immed;
- else
- address -= immed;
- sprintf(cp, "PLI\t%#8.8" PRIx32, address);
- return ERROR_OK;
- }
- if (rn == 0xf && rt != 0xf) {
-ldrsb_literal:
- immed = opcode & 0xfff;
- address = thumb_alignpc4(address);
- if (opcode & (1 << 23))
- address += immed;
- else
- address -= immed;
- sprintf(cp, "LDRSB\t%#8.8" PRIx32, address);
- return ERROR_OK;
- }
- if (rn == 0xf)
- break;
- if ((op2 & 0x3c) == 0x38) {
- immed = opcode & 0xff;
- sprintf(cp, "LDRSBT\tr%d, [r%d, #%d]\t; %#2.2x",
- rt, rn, immed, immed);
- return ERROR_OK;
- }
- if ((op2 & 0x3c) == 0x30) {
- if (rt == 0xf) {
- immed = opcode & 0xff;
- immed = -immed; /* pli */
- sprintf(cp, "PLI\t[r%d, #%d]\t; -%#2.2x",
- rn, immed, -immed);
- return ERROR_OK;
- }
- mnemonic = "LDRSB";
- goto ldrxb_immediate_t3;
- }
- if ((op2 & 0x24) == 0x24) {
- mnemonic = "LDRSB";
- goto ldrxb_immediate_t3;
- }
- if (op2 == 0) {
- int rm = opcode & 0xf;
-
- if (rt == 0x0f)
- sprintf(cp, "PLI\t");
- else
- sprintf(cp, "LDRSB.W\tr%d, ", rt);
- immed = (opcode >> 4) & 0x3;
- cp = strchr(cp, 0);
- sprintf(cp, "[r%d, r%d, LSL #%d]", rn, rm, immed);
- return ERROR_OK;
- }
- break;
- case 3:
- if (rt == 0xf) {
- immed = opcode & 0xfff;
- sprintf(cp, "PLI\t[r%d, #%d]\t; %#3.3x",
- rn, immed, immed);
- return ERROR_OK;
- }
- if (rn == 0xf)
- goto ldrsb_literal;
- immed = opcode & 0xfff;
- mnemonic = "LDRSB";
- goto ldrxb_immediate_t2;
- }
-
- return ERROR_COMMAND_SYNTAX_ERROR;
-}
-
-static int t2ev_load_halfword(uint32_t opcode, uint32_t address,
- struct arm_instruction *instruction, char *cp)
-{
- int rn = (opcode >> 16) & 0xf;
- int rt = (opcode >> 12) & 0xf;
- int op2 = (opcode >> 6) & 0x3f;
- char *sign = "";
- unsigned immed;
-
- if (rt == 0xf) {
- sprintf(cp, "HINT (UNALLOCATED)");
- return ERROR_OK;
- }
-
- if (opcode & (1 << 24))
- sign = "S";
-
- if ((opcode & (1 << 23)) == 0) {
- if (rn == 0xf) {
-ldrh_literal:
- immed = opcode & 0xfff;
- address = thumb_alignpc4(address);
- if (opcode & (1 << 23))
- address += immed;
- else
- address -= immed;
- sprintf(cp, "LDR%sH\tr%d, %#8.8" PRIx32,
- sign, rt, address);
- return ERROR_OK;
- }
- if (op2 == 0) {
- int rm = opcode & 0xf;
-
- immed = (opcode >> 4) & 0x3;
- sprintf(cp, "LDR%sH.W\tr%d, [r%d, r%d, LSL #%d]",
- sign, rt, rn, rm, immed);
- return ERROR_OK;
- }
- if ((op2 & 0x3c) == 0x38) {
- immed = opcode & 0xff;
- sprintf(cp, "LDR%sHT\tr%d, [r%d, #%d]\t; %#2.2x",
- sign, rt, rn, immed, immed);
- return ERROR_OK;
- }
- if ((op2 & 0x3c) == 0x30 || (op2 & 0x24) == 0x24) {
- char *p1 = "", *p2 = "]";
-
- immed = opcode & 0xff;
- if (!(opcode & 0x200))
- immed = -immed;
-
- /* two indexed modes will write back rn */
- if (opcode & 0x100) {
- if (opcode & 0x400) /* pre-indexed */
- p2 = "]!";
- else { /* post-indexed */
- p1 = "]";
- p2 = "";
- }
- }
- sprintf(cp, "LDR%sH\tr%d, [r%d%s, #%d%s\t; %#8.8x",
- sign, rt, rn, p1, immed, p2, immed);
- return ERROR_OK;
- }
- } else {
- if (rn == 0xf)
- goto ldrh_literal;
-
- immed = opcode & 0xfff;
- sprintf(cp, "LDR%sH%s\tr%d, [r%d, #%d]\t; %#6.6x",
- sign, *sign ? "" : ".W",
- rt, rn, immed, immed);
- return ERROR_OK;
- }
-
- return ERROR_COMMAND_SYNTAX_ERROR;
-}
-
-/*
- * REVISIT for Thumb2 instructions, instruction->type and friends aren't
- * always set. That means eventual arm_simulate_step() support for Thumb2
- * will need work in this area.
- */
-int thumb2_opcode(struct target *target, uint32_t address, struct arm_instruction *instruction)
-{
- int retval;
- uint16_t op;
- uint32_t opcode;
- char *cp;
-
- /* clear low bit ... it's set on function pointers */
- address &= ~1;
-
- /* clear fields, to avoid confusion */
- memset(instruction, 0, sizeof(struct arm_instruction));
-
- /* read first halfword, see if this is the only one */
- retval = target_read_u16(target, address, &op);
- if (retval != ERROR_OK)
- return retval;
-
- switch (op & 0xf800) {
- case 0xf800:
- case 0xf000:
- case 0xe800:
- /* 32-bit instructions */
- instruction->instruction_size = 4;
- opcode = op << 16;
- retval = target_read_u16(target, address + 2, &op);
- if (retval != ERROR_OK)
- return retval;
- opcode |= op;
- instruction->opcode = opcode;
- break;
- default:
- /* 16-bit: Thumb1 + IT + CBZ/CBNZ + ... */
- return thumb_evaluate_opcode(op, address, instruction);
- }
-
- snprintf(instruction->text, 128,
- "0x%8.8" PRIx32 " 0x%8.8" PRIx32 "\t",
- address, opcode);
- cp = strchr(instruction->text, 0);
- retval = ERROR_FAIL;
-
- /* ARMv7-M: A5.3.1 Data processing (modified immediate) */
- if ((opcode & 0x1a008000) == 0x10000000)
- retval = t2ev_data_mod_immed(opcode, address, instruction, cp);
-
- /* ARMv7-M: A5.3.3 Data processing (plain binary immediate) */
- else if ((opcode & 0x1a008000) == 0x12000000)
- retval = t2ev_data_immed(opcode, address, instruction, cp);
-
- /* ARMv7-M: A5.3.4 Branches and miscellaneous control */
- else if ((opcode & 0x18008000) == 0x10008000)
- retval = t2ev_b_misc(opcode, address, instruction, cp);
-
- /* ARMv7-M: A5.3.5 Load/store multiple */
- else if ((opcode & 0x1e400000) == 0x08000000)
- retval = t2ev_ldm_stm(opcode, address, instruction, cp);
-
- /* ARMv7-M: A5.3.6 Load/store dual or exclusive, table branch */
- else if ((opcode & 0x1e400000) == 0x08400000)
- retval = t2ev_ldrex_strex(opcode, address, instruction, cp);
-
- /* ARMv7-M: A5.3.7 Load word */
- else if ((opcode & 0x1f700000) == 0x18500000)
- retval = t2ev_load_word(opcode, address, instruction, cp);
-
- /* ARMv7-M: A5.3.8 Load halfword, unallocated memory hints */
- else if ((opcode & 0x1e700000) == 0x18300000)
- retval = t2ev_load_halfword(opcode, address, instruction, cp);
-
- /* ARMv7-M: A5.3.9 Load byte, memory hints */
- else if ((opcode & 0x1e700000) == 0x18100000)
- retval = t2ev_load_byte_hints(opcode, address, instruction, cp);
-
- /* ARMv7-M: A5.3.10 Store single data item */
- else if ((opcode & 0x1f100000) == 0x18000000)
- retval = t2ev_store_single(opcode, address, instruction, cp);
-
- /* ARMv7-M: A5.3.11 Data processing (shifted register) */
- else if ((opcode & 0x1e000000) == 0x0a000000)
- retval = t2ev_data_shift(opcode, address, instruction, cp);
-
- /* ARMv7-M: A5.3.12 Data processing (register)
- * and A5.3.13 Miscellaneous operations
- */
- else if ((opcode & 0x1f000000) == 0x1a000000)
- retval = t2ev_data_reg(opcode, address, instruction, cp);
-
- /* ARMv7-M: A5.3.14 Multiply, and multiply accumulate */
- else if ((opcode & 0x1f800000) == 0x1b000000)
- retval = t2ev_mul32(opcode, address, instruction, cp);
-
- /* ARMv7-M: A5.3.15 Long multiply, long multiply accumulate, divide */
- else if ((opcode & 0x1f800000) == 0x1b800000)
- retval = t2ev_mul64_div(opcode, address, instruction, cp);
-
- if (retval == ERROR_OK)
- return retval;
-
- /*
- * Thumb2 also supports coprocessor, ThumbEE, and DSP/Media (SIMD)
- * instructions; not yet handled here.
- */
-
- if (retval == ERROR_COMMAND_SYNTAX_ERROR) {
- instruction->type = ARM_UNDEFINED_INSTRUCTION;
- strcpy(cp, "UNDEFINED OPCODE");
- return ERROR_OK;
- }
-
- LOG_DEBUG("Can't decode 32-bit Thumb2 yet (opcode=%08" PRIx32 ")",
- opcode);
-
- strcpy(cp, "(32-bit Thumb2 ...)");
- return ERROR_OK;
-}
-
-int arm_access_size(struct arm_instruction *instruction)
-{
- if ((instruction->type == ARM_LDRB)
- || (instruction->type == ARM_LDRBT)
- || (instruction->type == ARM_LDRSB)
- || (instruction->type == ARM_STRB)
- || (instruction->type == ARM_STRBT))
- return 1;
- else if ((instruction->type == ARM_LDRH)
- || (instruction->type == ARM_LDRSH)
- || (instruction->type == ARM_STRH))
- return 2;
- else if ((instruction->type == ARM_LDR)
- || (instruction->type == ARM_LDRT)
- || (instruction->type == ARM_STR)
- || (instruction->type == ARM_STRT))
- return 4;
- else if ((instruction->type == ARM_LDRD)
- || (instruction->type == ARM_STRD))
- return 8;
- else {
- LOG_ERROR("BUG: instruction type %i isn't a load/store instruction",
- instruction->type);
- return 0;
- }
}
+#endif /* HAVE_CAPSTONE */
projects / fw / openocd / blobdiff