* 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, write to the *
- * Free Software Foundation, Inc., *
- * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
+ * along with this program. If not, see <http://www.gnu.org/licenses/>. *
***************************************************************************/
+
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "target.h"
#include "arm_disassembler.h"
-#include "log.h"
+#include <helper/log.h>
+/*
+ * This disassembler supports two main functions for OpenOCD:
+ *
+ * - Various "disassemble" commands. OpenOCD can serve as a
+ * machine-language debugger, without help from GDB.
+ *
+ * - Single stepping. Not all ARM cores support hardware single
+ * stepping. To work without that support, the debugger must
+ * be able to decode instructions to find out where to put a
+ * "next instruction" breakpoint.
+ *
+ * In addition, interpretation of ETM trace data needs some of the
+ * decoding mechanisms.
+ *
+ * At this writing (September 2009) neither function is complete.
+ *
+ * - ARM decoding
+ * * Old-style syntax (not UAL) is generally used
+ * * VFP instructions are not understood (ARMv5 and later)
+ * except as coprocessor 10/11 operations
+ * * Most ARM instructions through ARMv6 are decoded, but some
+ * of the post-ARMv4 opcodes may not be handled yet
+ * CPS, SDIV, UDIV, LDREX*, STREX*, QASX, ...
+ * * NEON instructions are not understood (ARMv7-A)
+ *
+ * - Thumb/Thumb2 decoding
+ * * UAL syntax should be consistently used
+ * * Any Thumb2 instructions used in Cortex-M3 (ARMv7-M) should
+ * be handled properly. Accordingly, so should the subset
+ * used in Cortex-M0/M1; and "original" 16-bit Thumb from
+ * ARMv4T and ARMv5T.
+ * * Conditional effects of Thumb2 "IT" (if-then) instructions
+ * are not handled: the affected instructions are not shown
+ * with their now-conditional suffixes.
+ * * Some ARMv6 and ARMv7-M Thumb2 instructions may not be
+ * handled (minimally for coprocessor access).
+ * * SIMD instructions, and some other Thumb2 instructions
+ * from ARMv7-A, are not understood.
+ *
+ * - ThumbEE decoding
+ * * As a Thumb2 variant, the Thumb2 comments (above) apply.
+ * * Opcodes changed by ThumbEE mode are not handled; these
+ * instructions wrongly decode as LDM and STM.
+ *
+ * - Jazelle decoding ... no support whatsoever for Jazelle mode
+ * or decoding. ARM encourages use of the more generic ThumbEE
+ * mode, instead of Jazelle mode, in current chips.
+ *
+ * - Single-step/emulation ... spotty support, which is only weakly
+ * tested. Thumb2 is not supported. (Arguably a full simulator
+ * is not needed to support just single stepping. Recognizing
+ * branch vs non-branch instructions suffices, except when the
+ * instruction faults and triggers a synchronous exception which
+ * can be intercepted using other means.)
+ *
+ * ARM DDI 0406B "ARM Architecture Reference Manual, ARM v7-A and
+ * ARM v7-R edition" gives the most complete coverage of the various
+ * generations of ARM instructions. At this writing it is publicly
+ * accessible to anyone willing to create an account at the ARM
+ * web site; see http://www.arm.com/documentation/ for information.
+ *
+ * ARM DDI 0403C "ARMv7-M Architecture Reference Manual" provides
+ * more details relevant to the Thumb2-only processors (such as
+ * the Cortex-M implementations).
+ */
-/* textual represenation of the condition field */
-/* ALways (default) is ommitted (empty string) */
-char *arm_condition_strings[] =
-{
+/* textual represenation of the condition field
+ * ALways (default) is ommitted (empty string) */
+static const char *arm_condition_strings[] = {
"EQ", "NE", "CS", "CC", "MI", "PL", "VS", "VC", "HI", "LS", "GE", "LT", "GT", "LE", "", "NV"
};
/* make up for C's missing ROR */
-uint32_t ror(uint32_t value, int places)
+static uint32_t ror(uint32_t value, int places)
{
return (value >> places) | (value << (32 - places));
}
-int evaluate_pld(uint32_t opcode, uint32_t address, arm_instruction_t *instruction)
+static int evaluate_unknown(uint32_t opcode,
+ uint32_t address, struct arm_instruction *instruction)
+{
+ instruction->type = ARM_UNDEFINED_INSTRUCTION;
+ snprintf(instruction->text, 128,
+ "0x%8.8" PRIx32 "\t0x%8.8" PRIx32
+ "\tUNDEFINED INSTRUCTION", address, opcode);
+ return ERROR_OK;
+}
+
+static int evaluate_pld(uint32_t opcode,
+ uint32_t address, struct arm_instruction *instruction)
{
/* PLD */
- if ((opcode & 0x0d70f0000) == 0x0550f000)
- {
+ if ((opcode & 0x0d70f000) == 0x0550f000) {
instruction->type = ARM_PLD;
- snprintf(instruction->text, 128, "0x%8.8" PRIx32 "\t0x%8.8" PRIx32 "\tPLD ...TODO...", address, opcode);
+ snprintf(instruction->text,
+ 128,
+ "0x%8.8" PRIx32 "\t0x%8.8" PRIx32 "\tPLD ...TODO...",
+ address,
+ opcode);
return ERROR_OK;
}
- else
- {
- instruction->type = ARM_UNDEFINED_INSTRUCTION;
+ /* 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 "\tDSB %s",
+ address, opcode, opt);
+
return ERROR_OK;
}
+ /* ISB */
+ if ((opcode & 0x07f000f0) == 0x05700060) {
+ instruction->type = ARM_ISB;
- LOG_ERROR("should never reach this point");
- return -1;
+ snprintf(instruction->text,
+ 128,
+ "0x%8.8" PRIx32 "\t0x%8.8" PRIx32 "\tISB %s",
+ address, opcode,
+ ((opcode & 0x0000000f) == 0xf) ? "SY" : "UNK");
+
+ return ERROR_OK;
+ }
+ return evaluate_unknown(opcode, address, instruction);
+}
+
+static int evaluate_srs(uint32_t opcode,
+ uint32_t address, struct arm_instruction *instruction)
+{
+ const char *wback = (opcode & (1 << 21)) ? "!" : "";
+ const char *mode = "";
+
+ switch ((opcode >> 23) & 0x3) {
+ case 0:
+ mode = "DA";
+ break;
+ case 1:
+ /* "IA" is default */
+ break;
+ case 2:
+ mode = "DB";
+ break;
+ case 3:
+ mode = "IB";
+ break;
+ }
+
+ switch (opcode & 0x0e500000) {
+ case 0x08400000:
+ snprintf(instruction->text, 128, "0x%8.8" PRIx32
+ "\t0x%8.8" PRIx32
+ "\tSRS%s\tSP%s, #%d",
+ address, opcode,
+ mode, wback,
+ (unsigned)(opcode & 0x1f));
+ break;
+ case 0x08100000:
+ snprintf(instruction->text, 128, "0x%8.8" PRIx32
+ "\t0x%8.8" PRIx32
+ "\tRFE%s\tr%d%s",
+ address, opcode,
+ mode,
+ (unsigned)((opcode >> 16) & 0xf), wback);
+ break;
+ default:
+ return evaluate_unknown(opcode, address, instruction);
+ }
+ return ERROR_OK;
}
-int evaluate_swi(uint32_t opcode, uint32_t address, arm_instruction_t *instruction)
+static int evaluate_swi(uint32_t opcode,
+ uint32_t address, struct arm_instruction *instruction)
{
instruction->type = ARM_SWI;
return ERROR_OK;
}
-int evaluate_blx_imm(uint32_t opcode, uint32_t address, arm_instruction_t *instruction)
+static int evaluate_blx_imm(uint32_t opcode,
+ uint32_t address, struct arm_instruction *instruction)
{
int offset;
uint32_t immediate;
target_address = address + 8 + offset;
- snprintf(instruction->text, 128, "0x%8.8" PRIx32 "\t0x%8.8" PRIx32 "\tBLX 0x%8.8" PRIx32 "", address, opcode, target_address);
+ snprintf(instruction->text,
+ 128,
+ "0x%8.8" PRIx32 "\t0x%8.8" PRIx32 "\tBLX 0x%8.8" PRIx32 "",
+ address,
+ opcode,
+ target_address);
instruction->info.b_bl_bx_blx.reg_operand = -1;
instruction->info.b_bl_bx_blx.target_address = target_address;
return ERROR_OK;
}
-int evaluate_b_bl(uint32_t opcode, uint32_t address, arm_instruction_t *instruction)
+static int evaluate_b_bl(uint32_t opcode,
+ uint32_t address, struct arm_instruction *instruction)
{
uint8_t L;
uint32_t immediate;
else
instruction->type = ARM_B;
- snprintf(instruction->text, 128, "0x%8.8" PRIx32 "\t0x%8.8" PRIx32 "\tB%s%s 0x%8.8" PRIx32 , address, opcode,
- (L) ? "L" : "", COND(opcode), target_address);
+ snprintf(instruction->text,
+ 128,
+ "0x%8.8" PRIx32 "\t0x%8.8" PRIx32 "\tB%s%s 0x%8.8" PRIx32,
+ address,
+ opcode,
+ (L) ? "L" : "",
+ COND(opcode),
+ target_address);
instruction->info.b_bl_bx_blx.reg_operand = -1;
instruction->info.b_bl_bx_blx.target_address = target_address;
return ERROR_OK;
}
-/* Coprocessor load/store and double register transfers */
-/* both normal and extended instruction space (condition field b1111) */
-int evaluate_ldc_stc_mcrr_mrrc(uint32_t opcode, uint32_t address, arm_instruction_t *instruction)
+/* Coprocessor load/store and double register transfers
+ * both normal and extended instruction space (condition field b1111) */
+static int evaluate_ldc_stc_mcrr_mrrc(uint32_t opcode,
+ uint32_t address, struct arm_instruction *instruction)
{
uint8_t cp_num = (opcode & 0xf00) >> 8;
/* MCRR or MRRC */
- if (((opcode & 0x0ff00000) == 0x0c400000) || ((opcode & 0x0ff00000) == 0x0c400000))
- {
+ if (((opcode & 0x0ff00000) == 0x0c400000) || ((opcode & 0x0ff00000) == 0x0c500000)) {
uint8_t cp_opcode, Rd, Rn, CRm;
char *mnemonic;
CRm = (opcode & 0xf);
/* MCRR */
- if ((opcode & 0x0ff00000) == 0x0c400000)
- {
+ if ((opcode & 0x0ff00000) == 0x0c400000) {
instruction->type = ARM_MCRR;
mnemonic = "MCRR";
- }
-
- /* MRRC */
- if ((opcode & 0x0ff00000) == 0x0c500000)
- {
+ } else if ((opcode & 0x0ff00000) == 0x0c500000) {
+ /* MRRC */
instruction->type = ARM_MRRC;
mnemonic = "MRRC";
+ } else {
+ LOG_ERROR("Unknown instruction");
+ return ERROR_FAIL;
}
- snprintf(instruction->text, 128, "0x%8.8" PRIx32 "\t0x%8.8" PRIx32 "\t%s%s p%i, %x, r%i, r%i, c%i",
- address, opcode, mnemonic, COND(opcode), cp_num, cp_opcode, Rd, Rn, CRm);
- }
- else /* LDC or STC */
- {
+ snprintf(instruction->text, 128,
+ "0x%8.8" PRIx32 "\t0x%8.8" PRIx32
+ "\t%s%s%s p%i, %x, r%i, r%i, c%i",
+ address, opcode, mnemonic,
+ ((opcode & 0xf0000000) == 0xf0000000)
+ ? "2" : COND(opcode),
+ COND(opcode), cp_num, cp_opcode, Rd, Rn, CRm);
+ } else {/* LDC or STC */
uint8_t CRd, Rn, offset;
- uint8_t U, N;
+ uint8_t U;
char *mnemonic;
char addressing_mode[32];
CRd = (opcode & 0xf000) >> 12;
Rn = (opcode & 0xf0000) >> 16;
- offset = (opcode & 0xff);
+ offset = (opcode & 0xff) << 2;
/* load/store */
- if (opcode & 0x00100000)
- {
+ if (opcode & 0x00100000) {
instruction->type = ARM_LDC;
mnemonic = "LDC";
- }
- else
- {
+ } else {
instruction->type = ARM_STC;
mnemonic = "STC";
}
U = (opcode & 0x00800000) >> 23;
- N = (opcode & 0x00400000) >> 22;
/* addressing modes */
- if ((opcode & 0x01200000) == 0x01000000) /* immediate offset */
- snprintf(addressing_mode, 32, "[r%i, #%s0x%2.2x*4]", Rn, (U) ? "" : "-", offset);
- else if ((opcode & 0x01200000) == 0x01200000) /* immediate pre-indexed */
- snprintf(addressing_mode, 32, "[r%i, #%s0x%2.2x*4]!", Rn, (U) ? "" : "-", offset);
- else if ((opcode & 0x01200000) == 0x00200000) /* immediate post-indexed */
- snprintf(addressing_mode, 32, "[r%i], #%s0x%2.2x*4", Rn, (U) ? "" : "-", offset);
- else if ((opcode & 0x01200000) == 0x00000000) /* unindexed */
- snprintf(addressing_mode, 32, "[r%i], #0x%2.2x", Rn, offset);
-
- snprintf(instruction->text, 128, "0x%8.8" PRIx32 "\t0x%8.8" PRIx32 "\t%s%s%s p%i, c%i, %s",
- address, opcode, mnemonic, ((opcode & 0xf0000000) == 0xf0000000) ? COND(opcode) : "2",
- (N) ? "L" : "",
- cp_num, CRd, addressing_mode);
+ if ((opcode & 0x01200000) == 0x01000000)/* offset */
+ snprintf(addressing_mode, 32, "[r%i, #%s%d]",
+ Rn, U ? "" : "-", offset);
+ else if ((opcode & 0x01200000) == 0x01200000) /* pre-indexed */
+ snprintf(addressing_mode, 32, "[r%i, #%s%d]!",
+ Rn, U ? "" : "-", offset);
+ else if ((opcode & 0x01200000) == 0x00200000) /* post-indexed */
+ snprintf(addressing_mode, 32, "[r%i], #%s%d",
+ Rn, U ? "" : "-", offset);
+ else if ((opcode & 0x01200000) == 0x00000000) /* unindexed */
+ snprintf(addressing_mode, 32, "[r%i], {%d}",
+ Rn, offset >> 2);
+
+ snprintf(instruction->text, 128, "0x%8.8" PRIx32
+ "\t0x%8.8" PRIx32
+ "\t%s%s%s p%i, c%i, %s",
+ address, opcode, mnemonic,
+ ((opcode & 0xf0000000) == 0xf0000000)
+ ? "2" : COND(opcode),
+ (opcode & (1 << 22)) ? "L" : "",
+ cp_num, CRd, addressing_mode);
}
return ERROR_OK;
}
-/* Coprocessor data processing instructions */
-/* Coprocessor register transfer instructions */
-/* both normal and extended instruction space (condition field b1111) */
-int evaluate_cdp_mcr_mrc(uint32_t opcode, uint32_t address, arm_instruction_t *instruction)
+/* Coprocessor data processing instructions
+ * Coprocessor register transfer instructions
+ * both normal and extended instruction space (condition field b1111) */
+static int evaluate_cdp_mcr_mrc(uint32_t opcode,
+ uint32_t address, struct arm_instruction *instruction)
{
- char* cond;
- char* mnemonic;
+ const char *cond;
+ char *mnemonic;
uint8_t cp_num, opcode_1, CRd_Rd, CRn, CRm, opcode_2;
cond = ((opcode & 0xf0000000) == 0xf0000000) ? "2" : COND(opcode);
opcode_2 = (opcode & 0xe0) >> 5;
/* CDP or MRC/MCR */
- if (opcode & 0x00000010) /* bit 4 set -> MRC/MCR */
- {
- if (opcode & 0x00100000) /* bit 20 set -> MRC */
- {
+ if (opcode & 0x00000010) { /* bit 4 set -> MRC/MCR */
+ if (opcode & 0x00100000) { /* bit 20 set -> MRC */
instruction->type = ARM_MRC;
mnemonic = "MRC";
- }
- else /* bit 20 not set -> MCR */
- {
+ } else {/* bit 20 not set -> MCR */
instruction->type = ARM_MCR;
mnemonic = "MCR";
}
opcode_1 = (opcode & 0x00e00000) >> 21;
- snprintf(instruction->text, 128, "0x%8.8" PRIx32 "\t0x%8.8" PRIx32 "\t%s%s p%i, 0x%2.2x, r%i, c%i, c%i, 0x%2.2x",
- address, opcode, mnemonic, cond,
- cp_num, opcode_1, CRd_Rd, CRn, CRm, opcode_2);
- }
- else /* bit 4 not set -> CDP */
- {
+ snprintf(instruction->text,
+ 128,
+ "0x%8.8" PRIx32 "\t0x%8.8" PRIx32 "\t%s%s p%i, 0x%2.2x, r%i, c%i, c%i, 0x%2.2x",
+ address,
+ opcode,
+ mnemonic,
+ cond,
+ cp_num,
+ opcode_1,
+ CRd_Rd,
+ CRn,
+ CRm,
+ opcode_2);
+ } else {/* bit 4 not set -> CDP */
instruction->type = ARM_CDP;
mnemonic = "CDP";
opcode_1 = (opcode & 0x00f00000) >> 20;
- snprintf(instruction->text, 128, "0x%8.8" PRIx32 "\t0x%8.8" PRIx32 "\t%s%s p%i, 0x%2.2x, c%i, c%i, c%i, 0x%2.2x",
- address, opcode, mnemonic, cond,
- cp_num, opcode_1, CRd_Rd, CRn, CRm, opcode_2);
+ snprintf(instruction->text,
+ 128,
+ "0x%8.8" PRIx32 "\t0x%8.8" PRIx32 "\t%s%s p%i, 0x%2.2x, c%i, c%i, c%i, 0x%2.2x",
+ address,
+ opcode,
+ mnemonic,
+ cond,
+ cp_num,
+ opcode_1,
+ CRd_Rd,
+ CRn,
+ CRm,
+ opcode_2);
}
return ERROR_OK;
}
/* Load/store instructions */
-int evaluate_load_store(uint32_t opcode, uint32_t address, arm_instruction_t *instruction)
+static int evaluate_load_store(uint32_t opcode,
+ uint32_t address, struct arm_instruction *instruction)
{
uint8_t I, P, U, B, W, L;
uint8_t Rn, Rd;
- char *operation; /* "LDR" or "STR" */
- char *suffix; /* "", "B", "T", "BT" */
+ char *operation;/* "LDR" or "STR" */
+ char *suffix; /* "", "B", "T", "BT" */
char offset[32];
/* examine flags */
operation = "STR";
/* determine instruction type and suffix */
- if (B)
- {
- if ((P == 0) && (W == 1))
- {
+ if (B) {
+ if ((P == 0) && (W == 1)) {
if (L)
instruction->type = ARM_LDRBT;
else
instruction->type = ARM_STRBT;
suffix = "BT";
- }
- else
- {
+ } else {
if (L)
instruction->type = ARM_LDRB;
else
instruction->type = ARM_STRB;
suffix = "B";
}
- }
- else
- {
- if ((P == 0) && (W == 1))
- {
+ } else {
+ if ((P == 0) && (W == 1)) {
if (L)
instruction->type = ARM_LDRT;
else
instruction->type = ARM_STRT;
suffix = "T";
- }
- else
- {
+ } else {
if (L)
instruction->type = ARM_LDR;
else
}
}
- if (!I) /* #+-<offset_12> */
- {
+ if (!I) { /* #+-<offset_12> */
uint32_t offset_12 = (opcode & 0xfff);
if (offset_12)
snprintf(offset, 32, ", #%s0x%" PRIx32 "", (U) ? "" : "-", offset_12);
instruction->info.load_store.offset_mode = 0;
instruction->info.load_store.offset.offset = offset_12;
- }
- else /* either +-<Rm> or +-<Rm>, <shift>, #<shift_imm> */
- {
+ } else {/* either +-<Rm> or +-<Rm>, <shift>, #<shift_imm> */
uint8_t shift_imm, shift;
uint8_t Rm;
instruction->info.load_store.offset.reg.shift = shift;
instruction->info.load_store.offset.reg.shift_imm = shift_imm;
- if ((shift_imm == 0x0) && (shift == 0x0)) /* +-<Rm> */
- {
+ if ((shift_imm == 0x0) && (shift == 0x0)) /* +-<Rm> */
snprintf(offset, 32, ", %sr%i", (U) ? "" : "-", Rm);
- }
- else /* +-<Rm>, <Shift>, #<shift_imm> */
- {
- switch (shift)
- {
- case 0x0: /* LSL */
+ else { /* +-<Rm>, <Shift>, #<shift_imm> */
+ switch (shift) {
+ case 0x0: /* LSL */
snprintf(offset, 32, ", %sr%i, LSL #0x%x", (U) ? "" : "-", Rm, shift_imm);
break;
- case 0x1: /* LSR */
+ case 0x1: /* LSR */
snprintf(offset, 32, ", %sr%i, LSR #0x%x", (U) ? "" : "-", Rm, shift_imm);
break;
- case 0x2: /* ASR */
+ case 0x2: /* ASR */
snprintf(offset, 32, ", %sr%i, ASR #0x%x", (U) ? "" : "-", Rm, shift_imm);
break;
- case 0x3: /* ROR */
+ case 0x3: /* ROR */
snprintf(offset, 32, ", %sr%i, ROR #0x%x", (U) ? "" : "-", Rm, shift_imm);
break;
- case 0x4: /* RRX */
+ case 0x4: /* RRX */
snprintf(offset, 32, ", %sr%i, RRX", (U) ? "" : "-", Rm);
break;
}
}
}
- if (P == 1)
- {
- if (W == 0) /* offset */
- {
- snprintf(instruction->text, 128, "0x%8.8" PRIx32 "\t0x%8.8" PRIx32 "\t%s%s%s r%i, [r%i%s]",
- address, opcode, operation, COND(opcode), suffix,
- Rd, Rn, offset);
+ if (P == 1) {
+ if (W == 0) { /* offset */
+ snprintf(instruction->text,
+ 128,
+ "0x%8.8" PRIx32 "\t0x%8.8" PRIx32 "\t%s%s%s r%i, [r%i%s]",
+ address,
+ opcode,
+ operation,
+ COND(opcode),
+ suffix,
+ Rd,
+ Rn,
+ offset);
instruction->info.load_store.index_mode = 0;
- }
- else /* pre-indexed */
- {
- snprintf(instruction->text, 128, "0x%8.8" PRIx32 "\t0x%8.8" PRIx32 "\t%s%s%s r%i, [r%i%s]!",
- address, opcode, operation, COND(opcode), suffix,
- Rd, Rn, offset);
+ } else {/* pre-indexed */
+ snprintf(instruction->text,
+ 128,
+ "0x%8.8" PRIx32 "\t0x%8.8" PRIx32 "\t%s%s%s r%i, [r%i%s]!",
+ address,
+ opcode,
+ operation,
+ COND(opcode),
+ suffix,
+ Rd,
+ Rn,
+ offset);
instruction->info.load_store.index_mode = 1;
}
- }
- else /* post-indexed */
- {
- snprintf(instruction->text, 128, "0x%8.8" PRIx32 "\t0x%8.8" PRIx32 "\t%s%s%s r%i, [r%i]%s",
- address, opcode, operation, COND(opcode), suffix,
- Rd, Rn, offset);
+ } else {/* post-indexed */
+ snprintf(instruction->text,
+ 128,
+ "0x%8.8" PRIx32 "\t0x%8.8" PRIx32 "\t%s%s%s r%i, [r%i]%s",
+ address,
+ opcode,
+ operation,
+ COND(opcode),
+ suffix,
+ Rd,
+ Rn,
+ offset);
instruction->info.load_store.index_mode = 2;
}
return ERROR_OK;
}
+static int evaluate_extend(uint32_t opcode, uint32_t address, char *cp)
+{
+ unsigned rm = (opcode >> 0) & 0xf;
+ unsigned rd = (opcode >> 12) & 0xf;
+ unsigned rn = (opcode >> 16) & 0xf;
+ char *type, *rot;
+
+ switch ((opcode >> 24) & 0x3) {
+ case 0:
+ type = "B16";
+ break;
+ case 1:
+ sprintf(cp, "UNDEFINED");
+ return ARM_UNDEFINED_INSTRUCTION;
+ case 2:
+ type = "B";
+ break;
+ default:
+ type = "H";
+ break;
+ }
+
+ switch ((opcode >> 10) & 0x3) {
+ case 0:
+ rot = "";
+ break;
+ case 1:
+ rot = ", ROR #8";
+ break;
+ case 2:
+ rot = ", ROR #16";
+ break;
+ default:
+ rot = ", ROR #24";
+ break;
+ }
+
+ if (rn == 0xf) {
+ sprintf(cp, "%cXT%s%s\tr%d, r%d%s",
+ (opcode & (1 << 22)) ? 'U' : 'S',
+ type, COND(opcode),
+ rd, rm, rot);
+ return ARM_MOV;
+ } else {
+ sprintf(cp, "%cXTA%s%s\tr%d, r%d, r%d%s",
+ (opcode & (1 << 22)) ? 'U' : 'S',
+ type, COND(opcode),
+ rd, rn, rm, rot);
+ return ARM_ADD;
+ }
+}
+
+static int evaluate_p_add_sub(uint32_t opcode, uint32_t address, char *cp)
+{
+ char *prefix;
+ char *op;
+ int type;
+
+ switch ((opcode >> 20) & 0x7) {
+ case 1:
+ prefix = "S";
+ break;
+ case 2:
+ prefix = "Q";
+ break;
+ case 3:
+ prefix = "SH";
+ break;
+ case 5:
+ prefix = "U";
+ break;
+ case 6:
+ prefix = "UQ";
+ break;
+ case 7:
+ prefix = "UH";
+ break;
+ default:
+ goto undef;
+ }
+
+ switch ((opcode >> 5) & 0x7) {
+ case 0:
+ op = "ADD16";
+ type = ARM_ADD;
+ break;
+ case 1:
+ op = "ADDSUBX";
+ type = ARM_ADD;
+ break;
+ case 2:
+ op = "SUBADDX";
+ type = ARM_SUB;
+ break;
+ case 3:
+ op = "SUB16";
+ type = ARM_SUB;
+ break;
+ case 4:
+ op = "ADD8";
+ type = ARM_ADD;
+ break;
+ case 7:
+ op = "SUB8";
+ type = ARM_SUB;
+ break;
+ default:
+ goto undef;
+ }
+
+ sprintf(cp, "%s%s%s\tr%d, r%d, r%d", prefix, op, COND(opcode),
+ (int) (opcode >> 12) & 0xf,
+ (int) (opcode >> 16) & 0xf,
+ (int) (opcode >> 0) & 0xf);
+ return type;
+
+undef:
+ /* these opcodes might be used someday */
+ sprintf(cp, "UNDEFINED");
+ return ARM_UNDEFINED_INSTRUCTION;
+}
+
+/* ARMv6 and later support "media" instructions (includes SIMD) */
+static int evaluate_media(uint32_t opcode, uint32_t address,
+ struct arm_instruction *instruction)
+{
+ char *cp = instruction->text;
+ char *mnemonic = NULL;
+
+ sprintf(cp,
+ "0x%8.8" PRIx32 "\t0x%8.8" PRIx32 "\t",
+ address, opcode);
+ cp = strchr(cp, 0);
+
+ /* parallel add/subtract */
+ if ((opcode & 0x01800000) == 0x00000000) {
+ instruction->type = evaluate_p_add_sub(opcode, address, cp);
+ return ERROR_OK;
+ }
+
+ /* halfword pack */
+ if ((opcode & 0x01f00020) == 0x00800000) {
+ char *type, *shift;
+ unsigned imm = (unsigned) (opcode >> 7) & 0x1f;
+
+ if (opcode & (1 << 6)) {
+ type = "TB";
+ shift = "ASR";
+ if (imm == 0)
+ imm = 32;
+ } else {
+ type = "BT";
+ shift = "LSL";
+ }
+ sprintf(cp, "PKH%s%s\tr%d, r%d, r%d, %s #%d",
+ type, COND(opcode),
+ (int) (opcode >> 12) & 0xf,
+ (int) (opcode >> 16) & 0xf,
+ (int) (opcode >> 0) & 0xf,
+ shift, imm);
+ return ERROR_OK;
+ }
+
+ /* word saturate */
+ if ((opcode & 0x01a00020) == 0x00a00000) {
+ char *shift;
+ unsigned imm = (unsigned) (opcode >> 7) & 0x1f;
+
+ if (opcode & (1 << 6)) {
+ shift = "ASR";
+ if (imm == 0)
+ imm = 32;
+ } else
+ shift = "LSL";
+
+ sprintf(cp, "%cSAT%s\tr%d, #%d, r%d, %s #%d",
+ (opcode & (1 << 22)) ? 'U' : 'S',
+ COND(opcode),
+ (int) (opcode >> 12) & 0xf,
+ (int) (opcode >> 16) & 0x1f,
+ (int) (opcode >> 0) & 0xf,
+ shift, imm);
+ return ERROR_OK;
+ }
+
+ /* sign extension */
+ if ((opcode & 0x018000f0) == 0x00800070) {
+ instruction->type = evaluate_extend(opcode, address, cp);
+ return ERROR_OK;
+ }
+
+ /* multiplies */
+ if ((opcode & 0x01f00080) == 0x01000000) {
+ unsigned rn = (opcode >> 12) & 0xf;
+
+ if (rn != 0xf)
+ sprintf(cp, "SML%cD%s%s\tr%d, r%d, r%d, r%d",
+ (opcode & (1 << 6)) ? 'S' : 'A',
+ (opcode & (1 << 5)) ? "X" : "",
+ COND(opcode),
+ (int) (opcode >> 16) & 0xf,
+ (int) (opcode >> 0) & 0xf,
+ (int) (opcode >> 8) & 0xf,
+ rn);
+ else
+ sprintf(cp, "SMU%cD%s%s\tr%d, r%d, r%d",
+ (opcode & (1 << 6)) ? 'S' : 'A',
+ (opcode & (1 << 5)) ? "X" : "",
+ COND(opcode),
+ (int) (opcode >> 16) & 0xf,
+ (int) (opcode >> 0) & 0xf,
+ (int) (opcode >> 8) & 0xf);
+ return ERROR_OK;
+ }
+ if ((opcode & 0x01f00000) == 0x01400000) {
+ sprintf(cp, "SML%cLD%s%s\tr%d, r%d, r%d, r%d",
+ (opcode & (1 << 6)) ? 'S' : 'A',
+ (opcode & (1 << 5)) ? "X" : "",
+ COND(opcode),
+ (int) (opcode >> 12) & 0xf,
+ (int) (opcode >> 16) & 0xf,
+ (int) (opcode >> 0) & 0xf,
+ (int) (opcode >> 8) & 0xf);
+ return ERROR_OK;
+ }
+ if ((opcode & 0x01f00000) == 0x01500000) {
+ unsigned rn = (opcode >> 12) & 0xf;
+
+ switch (opcode & 0xc0) {
+ case 3:
+ if (rn == 0xf)
+ goto undef;
+ /* FALL THROUGH */
+ case 0:
+ break;
+ default:
+ goto undef;
+ }
+
+ if (rn != 0xf)
+ sprintf(cp, "SMML%c%s%s\tr%d, r%d, r%d, r%d",
+ (opcode & (1 << 6)) ? 'S' : 'A',
+ (opcode & (1 << 5)) ? "R" : "",
+ COND(opcode),
+ (int) (opcode >> 16) & 0xf,
+ (int) (opcode >> 0) & 0xf,
+ (int) (opcode >> 8) & 0xf,
+ rn);
+ else
+ sprintf(cp, "SMMUL%s%s\tr%d, r%d, r%d",
+ (opcode & (1 << 5)) ? "R" : "",
+ COND(opcode),
+ (int) (opcode >> 16) & 0xf,
+ (int) (opcode >> 0) & 0xf,
+ (int) (opcode >> 8) & 0xf);
+ return ERROR_OK;
+ }
+
+ /* simple matches against the remaining decode bits */
+ switch (opcode & 0x01f000f0) {
+ case 0x00a00030:
+ case 0x00e00030:
+ /* parallel halfword saturate */
+ sprintf(cp, "%cSAT16%s\tr%d, #%d, r%d",
+ (opcode & (1 << 22)) ? 'U' : 'S',
+ COND(opcode),
+ (int) (opcode >> 12) & 0xf,
+ (int) (opcode >> 16) & 0xf,
+ (int) (opcode >> 0) & 0xf);
+ return ERROR_OK;
+ case 0x00b00030:
+ mnemonic = "REV";
+ break;
+ case 0x00b000b0:
+ mnemonic = "REV16";
+ break;
+ case 0x00f000b0:
+ mnemonic = "REVSH";
+ break;
+ case 0x008000b0:
+ /* select bytes */
+ sprintf(cp, "SEL%s\tr%d, r%d, r%d", COND(opcode),
+ (int) (opcode >> 12) & 0xf,
+ (int) (opcode >> 16) & 0xf,
+ (int) (opcode >> 0) & 0xf);
+ return ERROR_OK;
+ case 0x01800010:
+ /* unsigned sum of absolute differences */
+ if (((opcode >> 12) & 0xf) == 0xf)
+ sprintf(cp, "USAD8%s\tr%d, r%d, r%d", COND(opcode),
+ (int) (opcode >> 16) & 0xf,
+ (int) (opcode >> 0) & 0xf,
+ (int) (opcode >> 8) & 0xf);
+ else
+ sprintf(cp, "USADA8%s\tr%d, r%d, r%d, r%d", COND(opcode),
+ (int) (opcode >> 16) & 0xf,
+ (int) (opcode >> 0) & 0xf,
+ (int) (opcode >> 8) & 0xf,
+ (int) (opcode >> 12) & 0xf);
+ return ERROR_OK;
+ }
+ if (mnemonic) {
+ unsigned rm = (opcode >> 0) & 0xf;
+ unsigned rd = (opcode >> 12) & 0xf;
+
+ sprintf(cp, "%s%s\tr%d, r%d", mnemonic, COND(opcode), rm, rd);
+ return ERROR_OK;
+ }
+
+undef:
+ /* these opcodes might be used someday */
+ sprintf(cp, "UNDEFINED");
+ return ERROR_OK;
+}
+
/* Miscellaneous load/store instructions */
-int evaluate_misc_load_store(uint32_t opcode, uint32_t address, arm_instruction_t *instruction)
+static int evaluate_misc_load_store(uint32_t opcode,
+ uint32_t address, struct arm_instruction *instruction)
{
uint8_t P, U, I, W, L, S, H;
uint8_t Rn, Rd;
- char *operation; /* "LDR" or "STR" */
- char *suffix; /* "H", "SB", "SH", "D" */
+ char *operation;/* "LDR" or "STR" */
+ char *suffix; /* "H", "SB", "SH", "D" */
char offset[32];
/* examine flags */
instruction->info.load_store.U = U;
/* determine instruction type and suffix */
- if (S) /* signed */
- {
- if (L) /* load */
- {
- if (H)
- {
+ if (S) {/* signed */
+ if (L) {/* load */
+ if (H) {
operation = "LDR";
instruction->type = ARM_LDRSH;
suffix = "SH";
- }
- else
- {
+ } else {
operation = "LDR";
instruction->type = ARM_LDRSB;
suffix = "SB";
}
- }
- else /* there are no signed stores, so this is used to encode double-register load/stores */
- {
+ } else {/* there are no signed stores, so this is used to encode double-register
+ *load/stores */
suffix = "D";
- if (H)
- {
+ if (H) {
operation = "STR";
instruction->type = ARM_STRD;
- }
- else
- {
+ } else {
operation = "LDR";
instruction->type = ARM_LDRD;
}
}
- }
- else /* unsigned */
- {
+ } else {/* unsigned */
suffix = "H";
- if (L) /* load */
- {
+ if (L) {/* load */
operation = "LDR";
instruction->type = ARM_LDRH;
- }
- else /* store */
- {
+ } else {/* store */
operation = "STR";
instruction->type = ARM_STRH;
}
}
- if (I) /* Immediate offset/index (#+-<offset_8>)*/
- {
+ if (I) {/* Immediate offset/index (#+-<offset_8>)*/
uint32_t offset_8 = ((opcode & 0xf00) >> 4) | (opcode & 0xf);
snprintf(offset, 32, "#%s0x%" PRIx32 "", (U) ? "" : "-", offset_8);
instruction->info.load_store.offset_mode = 0;
instruction->info.load_store.offset.offset = offset_8;
- }
- else /* Register offset/index (+-<Rm>) */
- {
+ } else {/* Register offset/index (+-<Rm>) */
uint8_t Rm;
Rm = (opcode & 0xf);
snprintf(offset, 32, "%sr%i", (U) ? "" : "-", Rm);
instruction->info.load_store.offset.reg.shift_imm = 0x0;
}
- if (P == 1)
- {
- if (W == 0) /* offset */
- {
- snprintf(instruction->text, 128, "0x%8.8" PRIx32 "\t0x%8.8" PRIx32 "\t%s%s%s r%i, [r%i, %s]",
- address, opcode, operation, COND(opcode), suffix,
- Rd, Rn, offset);
+ if (P == 1) {
+ if (W == 0) { /* offset */
+ snprintf(instruction->text,
+ 128,
+ "0x%8.8" PRIx32 "\t0x%8.8" PRIx32 "\t%s%s%s r%i, [r%i, %s]",
+ address,
+ opcode,
+ operation,
+ COND(opcode),
+ suffix,
+ Rd,
+ Rn,
+ offset);
instruction->info.load_store.index_mode = 0;
- }
- else /* pre-indexed */
- {
- snprintf(instruction->text, 128, "0x%8.8" PRIx32 "\t0x%8.8" PRIx32 "\t%s%s%s r%i, [r%i, %s]!",
- address, opcode, operation, COND(opcode), suffix,
- Rd, Rn, offset);
+ } else {/* pre-indexed */
+ snprintf(instruction->text,
+ 128,
+ "0x%8.8" PRIx32 "\t0x%8.8" PRIx32 "\t%s%s%s r%i, [r%i, %s]!",
+ address,
+ opcode,
+ operation,
+ COND(opcode),
+ suffix,
+ Rd,
+ Rn,
+ offset);
instruction->info.load_store.index_mode = 1;
}
- }
- else /* post-indexed */
- {
- snprintf(instruction->text, 128, "0x%8.8" PRIx32 "\t0x%8.8" PRIx32 "\t%s%s%s r%i, [r%i], %s",
- address, opcode, operation, COND(opcode), suffix,
- Rd, Rn, offset);
+ } else {/* post-indexed */
+ snprintf(instruction->text,
+ 128,
+ "0x%8.8" PRIx32 "\t0x%8.8" PRIx32 "\t%s%s%s r%i, [r%i], %s",
+ address,
+ opcode,
+ operation,
+ COND(opcode),
+ suffix,
+ Rd,
+ Rn,
+ offset);
instruction->info.load_store.index_mode = 2;
}
}
/* Load/store multiples instructions */
-int evaluate_ldm_stm(uint32_t opcode, uint32_t address, arm_instruction_t *instruction)
+static int evaluate_ldm_stm(uint32_t opcode,
+ uint32_t address, struct arm_instruction *instruction)
{
uint8_t P, U, S, W, L, Rn;
uint32_t register_list;
instruction->info.load_store_multiple.S = S;
instruction->info.load_store_multiple.W = W;
- if (L)
- {
+ if (L) {
instruction->type = ARM_LDM;
mnemonic = "LDM";
- }
- else
- {
+ } else {
instruction->type = ARM_STM;
mnemonic = "STM";
}
- if (P)
- {
- if (U)
- {
+ if (P) {
+ if (U) {
instruction->info.load_store_multiple.addressing_mode = 1;
addressing_mode = "IB";
- }
- else
- {
+ } else {
instruction->info.load_store_multiple.addressing_mode = 3;
addressing_mode = "DB";
}
- }
- else
- {
- if (U)
- {
+ } else {
+ if (U) {
instruction->info.load_store_multiple.addressing_mode = 0;
/* "IA" is the default in UAL syntax */
addressing_mode = "";
- }
- else
- {
+ } else {
instruction->info.load_store_multiple.addressing_mode = 2;
addressing_mode = "DA";
}
}
reg_list_p = reg_list;
- for (i = 0; i <= 15; i++)
- {
- if ((register_list >> i) & 1)
- {
- if (first_reg)
- {
+ for (i = 0; i <= 15; i++) {
+ if ((register_list >> i) & 1) {
+ if (first_reg) {
first_reg = 0;
- reg_list_p += snprintf(reg_list_p, (reg_list + 69 - reg_list_p), "r%i", i);
- }
- else
- {
- reg_list_p += snprintf(reg_list_p, (reg_list + 69 - reg_list_p), ", r%i", i);
- }
+ reg_list_p += snprintf(reg_list_p,
+ (reg_list + 69 - reg_list_p),
+ "r%i",
+ i);
+ } else
+ reg_list_p += snprintf(reg_list_p,
+ (reg_list + 69 - reg_list_p),
+ ", r%i",
+ i);
}
}
- snprintf(instruction->text, 128, "0x%8.8" PRIx32 "\t0x%8.8" PRIx32 "\t%s%s%s r%i%s, {%s}%s",
- address, opcode, mnemonic, COND(opcode), addressing_mode,
- Rn, (W) ? "!" : "", reg_list, (S) ? "^" : "");
+ snprintf(instruction->text, 128,
+ "0x%8.8" PRIx32 "\t0x%8.8" PRIx32
+ "\t%s%s%s r%i%s, {%s}%s",
+ address, opcode,
+ mnemonic, addressing_mode, COND(opcode),
+ Rn, (W) ? "!" : "", reg_list, (S) ? "^" : "");
return ERROR_OK;
}
/* Multiplies, extra load/stores */
-int evaluate_mul_and_extra_ld_st(uint32_t opcode, uint32_t address, arm_instruction_t *instruction)
+static int evaluate_mul_and_extra_ld_st(uint32_t opcode,
+ uint32_t address, struct arm_instruction *instruction)
{
/* Multiply (accumulate) (long) and Swap/swap byte */
- if ((opcode & 0x000000f0) == 0x00000090)
- {
+ if ((opcode & 0x000000f0) == 0x00000090) {
/* Multiply (accumulate) */
- if ((opcode & 0x0f800000) == 0x00000000)
- {
+ if ((opcode & 0x0f800000) == 0x00000000) {
uint8_t Rm, Rs, Rn, Rd, S;
Rm = opcode & 0xf;
Rs = (opcode & 0xf00) >> 8;
S = (opcode & 0x00100000) >> 20;
/* examine A bit (accumulate) */
- if (opcode & 0x00200000)
- {
+ if (opcode & 0x00200000) {
instruction->type = ARM_MLA;
- snprintf(instruction->text, 128, "0x%8.8" PRIx32 "\t0x%8.8" PRIx32 "\tMLA%s%s r%i, r%i, r%i, r%i",
- address, opcode, COND(opcode), (S) ? "S" : "", Rd, Rm, Rs, Rn);
- }
- else
- {
+ snprintf(instruction->text,
+ 128,
+ "0x%8.8" PRIx32 "\t0x%8.8" PRIx32 "\tMLA%s%s r%i, r%i, r%i, r%i",
+ address,
+ opcode,
+ COND(opcode),
+ (S) ? "S" : "",
+ Rd,
+ Rm,
+ Rs,
+ Rn);
+ } else {
instruction->type = ARM_MUL;
- snprintf(instruction->text, 128, "0x%8.8" PRIx32 "\t0x%8.8" PRIx32 "\tMUL%s%s r%i, r%i, r%i",
- address, opcode, COND(opcode), (S) ? "S" : "", Rd, Rm, Rs);
+ snprintf(instruction->text,
+ 128,
+ "0x%8.8" PRIx32 "\t0x%8.8" PRIx32 "\tMUL%s%s r%i, r%i, r%i",
+ address,
+ opcode,
+ COND(opcode),
+ (S) ? "S" : "",
+ Rd,
+ Rm,
+ Rs);
}
return ERROR_OK;
}
/* Multiply (accumulate) long */
- if ((opcode & 0x0f800000) == 0x00800000)
- {
- char* mnemonic = NULL;
+ if ((opcode & 0x0f800000) == 0x00800000) {
+ char *mnemonic = NULL;
uint8_t Rm, Rs, RdHi, RdLow, S;
Rm = opcode & 0xf;
Rs = (opcode & 0xf00) >> 8;
RdLow = (opcode & 0xf0000) >> 16;
S = (opcode & 0x00100000) >> 20;
- switch ((opcode & 0x00600000) >> 21)
- {
+ switch ((opcode & 0x00600000) >> 21) {
case 0x0:
instruction->type = ARM_UMULL;
mnemonic = "UMULL";
break;
}
- snprintf(instruction->text, 128, "0x%8.8" PRIx32 "\t0x%8.8" PRIx32 "\t%s%s%s r%i, r%i, r%i, r%i",
- address, opcode, mnemonic, COND(opcode), (S) ? "S" : "",
- RdLow, RdHi, Rm, Rs);
+ snprintf(instruction->text,
+ 128,
+ "0x%8.8" PRIx32 "\t0x%8.8" PRIx32 "\t%s%s%s r%i, r%i, r%i, r%i",
+ address,
+ opcode,
+ mnemonic,
+ COND(opcode),
+ (S) ? "S" : "",
+ RdLow,
+ RdHi,
+ Rm,
+ Rs);
return ERROR_OK;
}
/* Swap/swap byte */
- if ((opcode & 0x0f800000) == 0x01000000)
- {
+ if ((opcode & 0x0f800000) == 0x01000000) {
uint8_t Rm, Rd, Rn;
Rm = opcode & 0xf;
Rd = (opcode & 0xf000) >> 12;
/* examine B flag */
instruction->type = (opcode & 0x00400000) ? ARM_SWPB : ARM_SWP;
- snprintf(instruction->text, 128, "0x%8.8" PRIx32 "\t0x%8.8" PRIx32 "\t%s%s r%i, r%i, [r%i]",
- address, opcode, (opcode & 0x00400000) ? "SWPB" : "SWP", COND(opcode), Rd, Rm, Rn);
+ snprintf(instruction->text,
+ 128,
+ "0x%8.8" PRIx32 "\t0x%8.8" PRIx32 "\t%s%s r%i, r%i, [r%i]",
+ address,
+ opcode,
+ (opcode & 0x00400000) ? "SWPB" : "SWP",
+ COND(opcode),
+ Rd,
+ Rm,
+ Rn);
return ERROR_OK;
}
return evaluate_misc_load_store(opcode, address, instruction);
}
-int evaluate_mrs_msr(uint32_t opcode, uint32_t address, arm_instruction_t *instruction)
+static int evaluate_mrs_msr(uint32_t opcode,
+ uint32_t address, struct arm_instruction *instruction)
{
int R = (opcode & 0x00400000) >> 22;
char *PSR = (R) ? "SPSR" : "CPSR";
/* Move register to status register (MSR) */
- if (opcode & 0x00200000)
- {
+ if (opcode & 0x00200000) {
instruction->type = ARM_MSR;
/* immediate variant */
- if (opcode & 0x02000000)
- {
+ if (opcode & 0x02000000) {
uint8_t immediate = (opcode & 0xff);
uint8_t rotate = (opcode & 0xf00);
- snprintf(instruction->text, 128, "0x%8.8" PRIx32 "\t0x%8.8" PRIx32 "\tMSR%s %s_%s%s%s%s, 0x%8.8" PRIx32 ,
- address, opcode, COND(opcode), PSR,
- (opcode & 0x10000) ? "c" : "",
- (opcode & 0x20000) ? "x" : "",
- (opcode & 0x40000) ? "s" : "",
- (opcode & 0x80000) ? "f" : "",
- ror(immediate, (rotate * 2))
-);
- }
- else /* register variant */
- {
+ snprintf(instruction->text,
+ 128,
+ "0x%8.8" PRIx32 "\t0x%8.8" PRIx32 "\tMSR%s %s_%s%s%s%s, 0x%8.8" PRIx32,
+ address,
+ opcode,
+ COND(opcode),
+ PSR,
+ (opcode & 0x10000) ? "c" : "",
+ (opcode & 0x20000) ? "x" : "",
+ (opcode & 0x40000) ? "s" : "",
+ (opcode & 0x80000) ? "f" : "",
+ ror(immediate, (rotate * 2))
+ );
+ } else {/* register variant */
uint8_t Rm = opcode & 0xf;
- snprintf(instruction->text, 128, "0x%8.8" PRIx32 "\t0x%8.8" PRIx32 "\tMSR%s %s_%s%s%s%s, r%i",
- address, opcode, COND(opcode), PSR,
- (opcode & 0x10000) ? "c" : "",
- (opcode & 0x20000) ? "x" : "",
- (opcode & 0x40000) ? "s" : "",
- (opcode & 0x80000) ? "f" : "",
- Rm
-);
+ snprintf(instruction->text,
+ 128,
+ "0x%8.8" PRIx32 "\t0x%8.8" PRIx32 "\tMSR%s %s_%s%s%s%s, r%i",
+ address,
+ opcode,
+ COND(opcode),
+ PSR,
+ (opcode & 0x10000) ? "c" : "",
+ (opcode & 0x20000) ? "x" : "",
+ (opcode & 0x40000) ? "s" : "",
+ (opcode & 0x80000) ? "f" : "",
+ Rm
+ );
}
- }
- else /* Move status register to register (MRS) */
- {
+ } else {/* Move status register to register (MRS) */
uint8_t Rd;
instruction->type = ARM_MRS;
Rd = (opcode & 0x0000f000) >> 12;
- snprintf(instruction->text, 128, "0x%8.8" PRIx32 "\t0x%8.8" PRIx32 "\tMRS%s r%i, %s",
- address, opcode, COND(opcode), Rd, PSR);
+ snprintf(instruction->text,
+ 128,
+ "0x%8.8" PRIx32 "\t0x%8.8" PRIx32 "\tMRS%s r%i, %s",
+ address,
+ opcode,
+ COND(opcode),
+ Rd,
+ PSR);
}
return ERROR_OK;
}
/* Miscellaneous instructions */
-int evaluate_misc_instr(uint32_t opcode, uint32_t address, arm_instruction_t *instruction)
+static int evaluate_misc_instr(uint32_t opcode,
+ uint32_t address, struct arm_instruction *instruction)
{
/* MRS/MSR */
if ((opcode & 0x000000f0) == 0x00000000)
- {
evaluate_mrs_msr(opcode, address, instruction);
- }
/* BX */
- if ((opcode & 0x006000f0) == 0x00200010)
- {
+ if ((opcode & 0x006000f0) == 0x00200010) {
uint8_t Rm;
instruction->type = ARM_BX;
Rm = opcode & 0xf;
snprintf(instruction->text, 128, "0x%8.8" PRIx32 "\t0x%8.8" PRIx32 "\tBX%s r%i",
- address, opcode, COND(opcode), Rm);
+ address, opcode, COND(opcode), Rm);
+
+ instruction->info.b_bl_bx_blx.reg_operand = Rm;
+ instruction->info.b_bl_bx_blx.target_address = -1;
+ }
+
+ /* BXJ - "Jazelle" support (ARMv5-J) */
+ if ((opcode & 0x006000f0) == 0x00200020) {
+ uint8_t Rm;
+ instruction->type = ARM_BX;
+ Rm = opcode & 0xf;
+
+ snprintf(instruction->text, 128,
+ "0x%8.8" PRIx32 "\t0x%8.8" PRIx32 "\tBXJ%s r%i",
+ address, opcode, COND(opcode), Rm);
instruction->info.b_bl_bx_blx.reg_operand = Rm;
instruction->info.b_bl_bx_blx.target_address = -1;
}
/* CLZ */
- if ((opcode & 0x006000f0) == 0x00600010)
- {
+ if ((opcode & 0x006000f0) == 0x00600010) {
uint8_t Rm, Rd;
instruction->type = ARM_CLZ;
Rm = opcode & 0xf;
Rd = (opcode & 0xf000) >> 12;
- snprintf(instruction->text, 128, "0x%8.8" PRIx32 "\t0x%8.8" PRIx32 "\tCLZ%s r%i, r%i",
- address, opcode, COND(opcode), Rd, Rm);
+ snprintf(instruction->text,
+ 128,
+ "0x%8.8" PRIx32 "\t0x%8.8" PRIx32 "\tCLZ%s r%i, r%i",
+ address,
+ opcode,
+ COND(opcode),
+ Rd,
+ Rm);
}
/* BLX(2) */
- if ((opcode & 0x006000f0) == 0x00200030)
- {
+ if ((opcode & 0x006000f0) == 0x00200030) {
uint8_t Rm;
instruction->type = ARM_BLX;
Rm = opcode & 0xf;
snprintf(instruction->text, 128, "0x%8.8" PRIx32 "\t0x%8.8" PRIx32 "\tBLX%s r%i",
- address, opcode, COND(opcode), Rm);
+ address, opcode, COND(opcode), Rm);
instruction->info.b_bl_bx_blx.reg_operand = Rm;
instruction->info.b_bl_bx_blx.target_address = -1;
}
/* Enhanced DSP add/subtracts */
- if ((opcode & 0x0000000f0) == 0x00000050)
- {
+ if ((opcode & 0x0000000f0) == 0x00000050) {
uint8_t Rm, Rd, Rn;
char *mnemonic = NULL;
Rm = opcode & 0xf;
Rd = (opcode & 0xf000) >> 12;
Rn = (opcode & 0xf0000) >> 16;
- switch ((opcode & 0x00600000) >> 21)
- {
+ switch ((opcode & 0x00600000) >> 21) {
case 0x0:
instruction->type = ARM_QADD;
mnemonic = "QADD";
break;
}
- snprintf(instruction->text, 128, "0x%8.8" PRIx32 "\t0x%8.8" PRIx32 "\t%s%s r%i, r%i, r%i",
- address, opcode, mnemonic, COND(opcode), Rd, Rm, Rn);
+ snprintf(instruction->text,
+ 128,
+ "0x%8.8" PRIx32 "\t0x%8.8" PRIx32 "\t%s%s r%i, r%i, r%i",
+ address,
+ opcode,
+ mnemonic,
+ COND(opcode),
+ Rd,
+ Rm,
+ Rn);
}
- /* Software breakpoints */
- if ((opcode & 0x0000000f0) == 0x00000070)
- {
- uint32_t immediate;
- instruction->type = ARM_BKPT;
- immediate = ((opcode & 0x000fff00) >> 4) | (opcode & 0xf);
+ /* exception return */
+ if ((opcode & 0x0000000f0) == 0x00000060) {
+ if (((opcode & 0x600000) >> 21) == 3)
+ instruction->type = ARM_ERET;
+ snprintf(instruction->text,
+ 128,
+ "0x%8.8" PRIx32 "\t0x%8.8" PRIx32 "\tERET",
+ address,
+ opcode);
+ }
+
+ /* exception generate instructions */
+ if ((opcode & 0x0000000f0) == 0x00000070) {
+ uint32_t immediate = 0;
+ char *mnemonic = NULL;
+
+ switch ((opcode & 0x600000) >> 21) {
+ case 0x1:
+ instruction->type = ARM_BKPT;
+ mnemonic = "BRKT";
+ immediate = ((opcode & 0x000fff00) >> 4) | (opcode & 0xf);
+ break;
+ case 0x2:
+ instruction->type = ARM_HVC;
+ mnemonic = "HVC";
+ immediate = ((opcode & 0x000fff00) >> 4) | (opcode & 0xf);
+ break;
+ case 0x3:
+ instruction->type = ARM_SMC;
+ mnemonic = "SMC";
+ immediate = (opcode & 0xf);
+ break;
+ }
- snprintf(instruction->text, 128, "0x%8.8" PRIx32 "\t0x%8.8" PRIx32 "\tBKPT 0x%4.4" PRIx32 "",
- address, opcode, immediate);
+ snprintf(instruction->text,
+ 128,
+ "0x%8.8" PRIx32 "\t0x%8.8" PRIx32 "\t%s 0x%4.4" PRIx32 "",
+ address,
+ opcode,
+ mnemonic,
+ immediate);
}
/* Enhanced DSP multiplies */
- if ((opcode & 0x000000090) == 0x00000080)
- {
+ if ((opcode & 0x000000090) == 0x00000080) {
int x = (opcode & 0x20) >> 5;
int y = (opcode & 0x40) >> 6;
/* SMLA < x><y> */
- if ((opcode & 0x00600000) == 0x00000000)
- {
+ if ((opcode & 0x00600000) == 0x00000000) {
uint8_t Rd, Rm, Rs, Rn;
instruction->type = ARM_SMLAxy;
Rd = (opcode & 0xf0000) >> 16;
Rs = (opcode & 0xf00) >> 8;
Rn = (opcode & 0xf000) >> 12;
- snprintf(instruction->text, 128, "0x%8.8" PRIx32 "\t0x%8.8" PRIx32 "\tSMLA%s%s%s r%i, r%i, r%i, r%i",
- address, opcode, (x) ? "T" : "B", (y) ? "T" : "B", COND(opcode),
- Rd, Rm, Rs, Rn);
+ snprintf(instruction->text,
+ 128,
+ "0x%8.8" PRIx32 "\t0x%8.8" PRIx32 "\tSMLA%s%s%s r%i, r%i, r%i, r%i",
+ address,
+ opcode,
+ (x) ? "T" : "B",
+ (y) ? "T" : "B",
+ COND(opcode),
+ Rd,
+ Rm,
+ Rs,
+ Rn);
}
/* SMLAL < x><y> */
- if ((opcode & 0x00600000) == 0x00400000)
- {
+ if ((opcode & 0x00600000) == 0x00400000) {
uint8_t RdLow, RdHi, Rm, Rs;
instruction->type = ARM_SMLAxy;
RdHi = (opcode & 0xf0000) >> 16;
Rm = (opcode & 0xf);
Rs = (opcode & 0xf00) >> 8;
- snprintf(instruction->text, 128, "0x%8.8" PRIx32 "\t0x%8.8" PRIx32 "\tSMLA%s%s%s r%i, r%i, r%i, r%i",
- address, opcode, (x) ? "T" : "B", (y) ? "T" : "B", COND(opcode),
- RdLow, RdHi, Rm, Rs);
+ snprintf(instruction->text,
+ 128,
+ "0x%8.8" PRIx32 "\t0x%8.8" PRIx32 "\tSMLA%s%s%s r%i, r%i, r%i, r%i",
+ address,
+ opcode,
+ (x) ? "T" : "B",
+ (y) ? "T" : "B",
+ COND(opcode),
+ RdLow,
+ RdHi,
+ Rm,
+ Rs);
}
/* 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;
Rs = (opcode & 0xf00) >> 8;
Rn = (opcode & 0xf000) >> 12;
- snprintf(instruction->text, 128, "0x%8.8" PRIx32 "\t0x%8.8" PRIx32 "\tSMLAW%s%s r%i, r%i, r%i, r%i",
- address, opcode, (y) ? "T" : "B", COND(opcode),
- Rd, Rm, Rs, Rn);
+ snprintf(instruction->text,
+ 128,
+ "0x%8.8" PRIx32 "\t0x%8.8" PRIx32 "\tSMLAW%s%s r%i, r%i, r%i, r%i",
+ address,
+ opcode,
+ (y) ? "T" : "B",
+ COND(opcode),
+ Rd,
+ Rm,
+ Rs,
+ Rn);
}
/* SMUL < x><y> */
- if ((opcode & 0x00600000) == 0x00300000)
- {
+ if ((opcode & 0x00600000) == 0x00600000) {
uint8_t Rd, Rm, Rs;
instruction->type = ARM_SMULxy;
Rd = (opcode & 0xf0000) >> 16;
Rm = (opcode & 0xf);
Rs = (opcode & 0xf00) >> 8;
- snprintf(instruction->text, 128, "0x%8.8" PRIx32 "\t0x%8.8" PRIx32 "\tSMULW%s%s%s r%i, r%i, r%i",
- address, opcode, (x) ? "T" : "B", (y) ? "T" : "B", COND(opcode),
- Rd, Rm, Rs);
+ snprintf(instruction->text,
+ 128,
+ "0x%8.8" PRIx32 "\t0x%8.8" PRIx32 "\tSMULW%s%s%s r%i, r%i, r%i",
+ address,
+ opcode,
+ (x) ? "T" : "B",
+ (y) ? "T" : "B",
+ COND(opcode),
+ Rd,
+ Rm,
+ Rs);
}
/* 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;
Rm = (opcode & 0xf);
Rs = (opcode & 0xf00) >> 8;
- snprintf(instruction->text, 128, "0x%8.8" PRIx32 "\t0x%8.8" PRIx32 "\tSMULW%s%s r%i, r%i, r%i",
- address, opcode, (y) ? "T" : "B", COND(opcode),
- Rd, Rm, Rs);
+ snprintf(instruction->text,
+ 128,
+ "0x%8.8" PRIx32 "\t0x%8.8" PRIx32 "\tSMULW%s%s r%i, r%i, r%i",
+ address,
+ opcode,
+ (y) ? "T" : "B",
+ COND(opcode),
+ Rd,
+ Rm,
+ Rs);
}
}
return ERROR_OK;
}
-int evaluate_data_proc(uint32_t opcode, uint32_t address, arm_instruction_t *instruction)
+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)
{
uint8_t I, op, S, Rn, Rd;
char *mnemonic = NULL;
instruction->info.data_proc.Rn = Rn;
instruction->info.data_proc.S = S;
- switch (op)
- {
+ switch (op) {
case 0x0:
instruction->type = ARM_AND;
mnemonic = "AND";
break;
}
- if (I) /* immediate shifter operand (#<immediate>)*/
- {
+ if (I) {/* immediate shifter operand (#<immediate>)*/
uint8_t immed_8 = opcode & 0xff;
uint8_t rotate_imm = (opcode & 0xf00) >> 8;
uint32_t immediate;
instruction->info.data_proc.variant = 0;
instruction->info.data_proc.shifter_operand.immediate.immediate = immediate;
- }
- else /* register-based shifter operand */
- {
+ } else {/* register-based shifter operand */
uint8_t shift, Rm;
shift = (opcode & 0x60) >> 5;
Rm = (opcode & 0xf);
- if ((opcode & 0x10) != 0x10) /* Immediate shifts ("<Rm>" or "<Rm>, <shift> #<shift_immediate>") */
- {
+ if ((opcode & 0x10) != 0x10) { /* Immediate shifts ("<Rm>" or "<Rm>, <shift>
+ *#<shift_immediate>") */
uint8_t shift_imm;
shift_imm = (opcode & 0xf80) >> 7;
instruction->info.data_proc.variant = 1;
instruction->info.data_proc.shifter_operand.immediate_shift.Rm = Rm;
- instruction->info.data_proc.shifter_operand.immediate_shift.shift_imm = shift_imm;
+ instruction->info.data_proc.shifter_operand.immediate_shift.shift_imm =
+ shift_imm;
instruction->info.data_proc.shifter_operand.immediate_shift.shift = shift;
/* LSR encodes a shift by 32 bit as 0x0 */
shift = 0x4;
if ((shift_imm == 0x0) && (shift == 0x0))
- {
snprintf(shifter_operand, 32, "r%i", Rm);
- }
- else
- {
- if (shift == 0x0) /* LSL */
- {
- snprintf(shifter_operand, 32, "r%i, LSL #0x%x", Rm, shift_imm);
- }
- else if (shift == 0x1) /* LSR */
- {
- snprintf(shifter_operand, 32, "r%i, LSR #0x%x", Rm, shift_imm);
- }
- else if (shift == 0x2) /* ASR */
- {
- snprintf(shifter_operand, 32, "r%i, ASR #0x%x", Rm, shift_imm);
- }
- else if (shift == 0x3) /* ROR */
- {
- snprintf(shifter_operand, 32, "r%i, ROR #0x%x", Rm, shift_imm);
- }
- else if (shift == 0x4) /* RRX */
- {
+ else {
+ if (shift == 0x0) /* LSL */
+ snprintf(shifter_operand,
+ 32,
+ "r%i, LSL #0x%x",
+ Rm,
+ shift_imm);
+ else if (shift == 0x1) /* LSR */
+ snprintf(shifter_operand,
+ 32,
+ "r%i, LSR #0x%x",
+ Rm,
+ shift_imm);
+ else if (shift == 0x2) /* ASR */
+ snprintf(shifter_operand,
+ 32,
+ "r%i, ASR #0x%x",
+ Rm,
+ shift_imm);
+ else if (shift == 0x3) /* ROR */
+ snprintf(shifter_operand,
+ 32,
+ "r%i, ROR #0x%x",
+ Rm,
+ shift_imm);
+ else if (shift == 0x4) /* RRX */
snprintf(shifter_operand, 32, "r%i, RRX", Rm);
- }
}
- }
- else /* Register shifts ("<Rm>, <shift> <Rs>") */
- {
+ } else {/* Register shifts ("<Rm>, <shift> <Rs>") */
uint8_t Rs = (opcode & 0xf00) >> 8;
instruction->info.data_proc.variant = 2;
instruction->info.data_proc.shifter_operand.register_shift.Rs = Rs;
instruction->info.data_proc.shifter_operand.register_shift.shift = shift;
- if (shift == 0x0) /* LSL */
- {
+ if (shift == 0x0) /* LSL */
snprintf(shifter_operand, 32, "r%i, LSL r%i", Rm, Rs);
- }
- else if (shift == 0x1) /* LSR */
- {
+ else if (shift == 0x1) /* LSR */
snprintf(shifter_operand, 32, "r%i, LSR r%i", Rm, Rs);
- }
- else if (shift == 0x2) /* ASR */
- {
+ else if (shift == 0x2) /* ASR */
snprintf(shifter_operand, 32, "r%i, ASR r%i", Rm, Rs);
- }
- else if (shift == 0x3) /* ROR */
- {
+ else if (shift == 0x3) /* ROR */
snprintf(shifter_operand, 32, "r%i, ROR r%i", Rm, Rs);
- }
}
}
- if ((op < 0x8) || (op == 0xc) || (op == 0xe)) /* <opcode3>{<cond>}{S} <Rd>, <Rn>, <shifter_operand> */
- {
- snprintf(instruction->text, 128, "0x%8.8" PRIx32 "\t0x%8.8" PRIx32 "\t%s%s%s r%i, r%i, %s",
- address, opcode, mnemonic, COND(opcode),
- (S) ? "S" : "", Rd, Rn, shifter_operand);
- }
- else if ((op == 0xd) || (op == 0xf)) /* <opcode1>{<cond>}{S} <Rd>, <shifter_operand> */
- {
- if (opcode == 0xe1a00000) /* print MOV r0,r0 as NOP */
- snprintf(instruction->text, 128, "0x%8.8" PRIx32 "\t0x%8.8" PRIx32 "\tNOP",address, opcode);
+ if ((op < 0x8) || (op == 0xc) || (op == 0xe)) { /* <opcode3>{<cond>}{S} <Rd>, <Rn>,
+ *<shifter_operand> */
+ snprintf(instruction->text,
+ 128,
+ "0x%8.8" PRIx32 "\t0x%8.8" PRIx32 "\t%s%s%s r%i, r%i, %s",
+ address,
+ opcode,
+ mnemonic,
+ COND(opcode),
+ (S) ? "S" : "",
+ Rd,
+ Rn,
+ shifter_operand);
+ } else if ((op == 0xd) || (op == 0xf)) { /* <opcode1>{<cond>}{S} <Rd>,
+ *<shifter_operand> */
+ if (opcode == 0xe1a00000) /* print MOV r0,r0 as NOP */
+ snprintf(instruction->text,
+ 128,
+ "0x%8.8" PRIx32 "\t0x%8.8" PRIx32 "\tNOP",
+ address,
+ opcode);
else
- snprintf(instruction->text, 128, "0x%8.8" PRIx32 "\t0x%8.8" PRIx32 "\t%s%s%s r%i, %s",
- address, opcode, mnemonic, COND(opcode),
- (S) ? "S" : "", Rd, shifter_operand);
- }
- else /* <opcode2>{<cond>} <Rn>, <shifter_operand> */
- {
+ snprintf(instruction->text,
+ 128,
+ "0x%8.8" PRIx32 "\t0x%8.8" PRIx32 "\t%s%s%s r%i, %s",
+ address,
+ opcode,
+ mnemonic,
+ COND(opcode),
+ (S) ? "S" : "",
+ Rd,
+ shifter_operand);
+ } else {/* <opcode2>{<cond>} <Rn>, <shifter_operand> */
snprintf(instruction->text, 128, "0x%8.8" PRIx32 "\t0x%8.8" PRIx32 "\t%s%s r%i, %s",
- address, opcode, mnemonic, COND(opcode),
- Rn, shifter_operand);
+ address, opcode, mnemonic, COND(opcode),
+ Rn, shifter_operand);
}
return ERROR_OK;
}
-int arm_evaluate_opcode(uint32_t opcode, uint32_t address, arm_instruction_t *instruction)
+int arm_evaluate_opcode(uint32_t opcode, uint32_t address,
+ struct arm_instruction *instruction)
{
/* clear fields, to avoid confusion */
- memset(instruction, 0, sizeof(arm_instruction_t));
+ memset(instruction, 0, sizeof(struct arm_instruction));
instruction->opcode = opcode;
instruction->instruction_size = 4;
/* catch opcodes with condition field [31:28] = b1111 */
- if ((opcode & 0xf0000000) == 0xf0000000)
- {
+ if ((opcode & 0xf0000000) == 0xf0000000) {
/* Undefined instruction (or ARMv5E cache preload PLD) */
if ((opcode & 0x08000000) == 0x00000000)
return evaluate_pld(opcode, address, instruction);
- /* Undefined instruction */
+ /* Undefined instruction (or ARMv6+ SRS/RFE) */
if ((opcode & 0x0e000000) == 0x08000000)
- {
- instruction->type = ARM_UNDEFINED_INSTRUCTION;
- snprintf(instruction->text, 128, "0x%8.8" PRIx32 "\t0x%8.8" PRIx32 "\tUNDEFINED INSTRUCTION", address, opcode);
- return ERROR_OK;
- }
+ return evaluate_srs(opcode, address, instruction);
/* Branch and branch with link and change to Thumb */
if ((opcode & 0x0e000000) == 0x0a000000)
return evaluate_blx_imm(opcode, address, instruction);
- /* Extended coprocessor opcode space (ARMv5 and higher)*/
- /* Coprocessor load/store and double register transfers */
+ /* Extended coprocessor opcode space (ARMv5 and higher)
+ * Coprocessor load/store and double register transfers */
if ((opcode & 0x0e000000) == 0x0c000000)
return evaluate_ldc_stc_mcrr_mrrc(opcode, address, instruction);
return evaluate_cdp_mcr_mrc(opcode, address, instruction);
/* Undefined instruction */
- if ((opcode & 0x0f000000) == 0x0f000000)
- {
+ if ((opcode & 0x0f000000) == 0x0f000000) {
instruction->type = ARM_UNDEFINED_INSTRUCTION;
- snprintf(instruction->text, 128, "0x%8.8" PRIx32 "\t0x%8.8" PRIx32 "\tUNDEFINED INSTRUCTION", address, opcode);
+ snprintf(instruction->text,
+ 128,
+ "0x%8.8" PRIx32 "\t0x%8.8" PRIx32 "\tUNDEFINED INSTRUCTION",
+ address,
+ opcode);
return ERROR_OK;
}
}
/* catch opcodes with [27:25] = b000 */
- if ((opcode & 0x0e000000) == 0x00000000)
- {
+ if ((opcode & 0x0e000000) == 0x00000000) {
/* Multiplies, extra load/stores */
if ((opcode & 0x00000090) == 0x00000090)
return evaluate_mul_and_extra_ld_st(opcode, address, instruction);
}
/* catch opcodes with [27:25] = b001 */
- if ((opcode & 0x0e000000) == 0x02000000)
- {
- /* Undefined instruction */
+ if ((opcode & 0x0e000000) == 0x02000000) {
+ /* 16-bit immediate load */
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;
- }
+ return evaluate_mov_imm(opcode, address, instruction);
/* Move immediate to status register */
if ((opcode & 0x0fb00000) == 0x03200000)
}
/* catch opcodes with [27:25] = b010 */
- if ((opcode & 0x0e000000) == 0x04000000)
- {
+ if ((opcode & 0x0e000000) == 0x04000000) {
/* Load/store immediate offset */
return evaluate_load_store(opcode, address, instruction);
}
/* catch opcodes with [27:25] = b011 */
- if ((opcode & 0x0e000000) == 0x06000000)
- {
- /* Undefined instruction */
- if ((opcode & 0x00000010) == 0x00000010)
- {
+ if ((opcode & 0x0e000000) == 0x06000000) {
+ /* Load/store register offset */
+ if ((opcode & 0x00000010) == 0x00000000)
+ return evaluate_load_store(opcode, address, instruction);
+
+ /* Architecturally Undefined instruction
+ * ... don't expect these to ever be used
+ */
+ if ((opcode & 0x07f000f0) == 0x07f000f0) {
instruction->type = ARM_UNDEFINED_INSTRUCTION;
- snprintf(instruction->text, 128, "0x%8.8" PRIx32 "\t0x%8.8" PRIx32 "\tUNDEFINED INSTRUCTION", address, opcode);
+ snprintf(instruction->text, 128,
+ "0x%8.8" PRIx32 "\t0x%8.8" PRIx32 "\tUNDEF",
+ address, opcode);
return ERROR_OK;
}
- /* Load/store register offset */
- return evaluate_load_store(opcode, address, instruction);
-
+ /* "media" instructions */
+ return evaluate_media(opcode, address, instruction);
}
/* catch opcodes with [27:25] = b100 */
- if ((opcode & 0x0e000000) == 0x08000000)
- {
+ if ((opcode & 0x0e000000) == 0x08000000) {
/* Load/store multiple */
return evaluate_ldm_stm(opcode, address, instruction);
}
/* catch opcodes with [27:25] = b101 */
- if ((opcode & 0x0e000000) == 0x0a000000)
- {
+ if ((opcode & 0x0e000000) == 0x0a000000) {
/* Branch and branch with link */
return evaluate_b_bl(opcode, address, instruction);
}
/* catch opcodes with [27:25] = b110 */
- if ((opcode & 0x0e000000) == 0x0a000000)
- {
+ if ((opcode & 0x0e000000) == 0x0c000000) {
/* Coprocessor load/store and double register transfers */
return evaluate_ldc_stc_mcrr_mrrc(opcode, address, instruction);
}
/* catch opcodes with [27:25] = b111 */
- if ((opcode & 0x0e000000) == 0x0e000000)
- {
+ if ((opcode & 0x0e000000) == 0x0e000000) {
/* Software interrupt */
if ((opcode & 0x0f000000) == 0x0f000000)
return evaluate_swi(opcode, address, instruction);
return evaluate_cdp_mcr_mrc(opcode, address, instruction);
}
- LOG_ERROR("should never reach this point");
+ LOG_ERROR("ARM: should never reach this point (opcode=%08x)",
+ (unsigned) opcode);
return -1;
}
-int evaluate_b_bl_blx_thumb(uint16_t opcode, uint32_t address, arm_instruction_t *instruction)
+static int evaluate_b_bl_blx_thumb(uint16_t opcode,
+ uint32_t address, struct arm_instruction *instruction)
{
uint32_t offset = opcode & 0x7ff;
uint32_t opc = (opcode >> 11) & 0x3;
target_address = address + 4 + (offset << 1);
- switch (opc)
- {
+ switch (opc) {
/* unconditional branch */
case 0:
instruction->type = ARM_B;
case 1:
instruction->type = ARM_BLX;
mnemonic = "BLX";
+ target_address &= 0xfffffffc;
break;
/* BL/BLX prefix */
case 2:
}
/* TODO: deal correctly with dual opcode (prefixed) BL/BLX;
- * these are effectively 32-bit instructions even in Thumb1.
- * Might be simplest to always use the Thumb2 decoder.
+ * these are effectively 32-bit instructions even in Thumb1. For
+ * disassembly, it's simplest to always use the Thumb2 decoder.
+ *
+ * But some cores will evidently handle them as two instructions,
+ * where exceptions may occur between the two. The ETMv3.2+ ID
+ * register has a bit which exposes this behavior.
*/
snprintf(instruction->text, 128,
return ERROR_OK;
}
-int evaluate_add_sub_thumb(uint16_t opcode, uint32_t address, arm_instruction_t *instruction)
+static int evaluate_add_sub_thumb(uint16_t opcode,
+ uint32_t address, struct arm_instruction *instruction)
{
uint8_t Rd = (opcode >> 0) & 0x7;
uint8_t Rn = (opcode >> 3) & 0x7;
uint32_t reg_imm = opcode & (1 << 10);
char *mnemonic;
- if (opc)
- {
+ if (opc) {
instruction->type = ARM_SUB;
mnemonic = "SUBS";
- }
- else
- {
+ } else {
+ /* REVISIT: if reg_imm == 0, display as "MOVS" */
instruction->type = ARM_ADD;
mnemonic = "ADDS";
}
instruction->info.data_proc.Rn = Rn;
instruction->info.data_proc.S = 1;
- if (reg_imm)
- {
- instruction->info.data_proc.variant = 0; /*immediate*/
+ if (reg_imm) {
+ instruction->info.data_proc.variant = 0;/*immediate*/
instruction->info.data_proc.shifter_operand.immediate.immediate = Rm_imm;
snprintf(instruction->text, 128,
- "0x%8.8" PRIx32 " 0x%4.4x \t%s\tr%i, r%i, #%d",
- address, opcode, mnemonic, Rd, Rn, Rm_imm);
- }
- else
- {
- instruction->info.data_proc.variant = 1; /*immediate shift*/
+ "0x%8.8" PRIx32 " 0x%4.4x \t%s\tr%i, r%i, #%d",
+ address, opcode, mnemonic, Rd, Rn, Rm_imm);
+ } else {
+ instruction->info.data_proc.variant = 1;/*immediate shift*/
instruction->info.data_proc.shifter_operand.immediate_shift.Rm = Rm_imm;
snprintf(instruction->text, 128,
- "0x%8.8" PRIx32 " 0x%4.4x \t%s\tr%i, r%i, r%i",
- address, opcode, mnemonic, Rd, Rn, Rm_imm);
+ "0x%8.8" PRIx32 " 0x%4.4x \t%s\tr%i, r%i, r%i",
+ address, opcode, mnemonic, Rd, Rn, Rm_imm);
}
return ERROR_OK;
}
-int evaluate_shift_imm_thumb(uint16_t opcode, uint32_t address, arm_instruction_t *instruction)
+static int evaluate_shift_imm_thumb(uint16_t opcode,
+ uint32_t address, struct arm_instruction *instruction)
{
uint8_t Rd = (opcode >> 0) & 0x7;
uint8_t Rm = (opcode >> 3) & 0x7;
uint8_t opc = (opcode >> 11) & 0x3;
char *mnemonic = NULL;
- switch (opc)
- {
+ switch (opc) {
case 0:
instruction->type = ARM_MOV;
mnemonic = "LSLS";
instruction->info.data_proc.Rn = -1;
instruction->info.data_proc.S = 1;
- instruction->info.data_proc.variant = 1; /*immediate_shift*/
+ instruction->info.data_proc.variant = 1;/*immediate_shift*/
instruction->info.data_proc.shifter_operand.immediate_shift.Rm = Rm;
instruction->info.data_proc.shifter_operand.immediate_shift.shift_imm = imm;
snprintf(instruction->text, 128,
- "0x%8.8" PRIx32 " 0x%4.4x \t%s\tr%i, r%i, #%#2.2x" ,
+ "0x%8.8" PRIx32 " 0x%4.4x \t%s\tr%i, r%i, #%#2.2x",
address, opcode, mnemonic, Rd, Rm, imm);
return ERROR_OK;
}
-int evaluate_data_proc_imm_thumb(uint16_t opcode, uint32_t address, arm_instruction_t *instruction)
+static int evaluate_data_proc_imm_thumb(uint16_t opcode,
+ uint32_t address, struct arm_instruction *instruction)
{
uint8_t imm = opcode & 0xff;
uint8_t Rd = (opcode >> 8) & 0x7;
instruction->info.data_proc.Rd = Rd;
instruction->info.data_proc.Rn = Rd;
instruction->info.data_proc.S = 1;
- instruction->info.data_proc.variant = 0; /*immediate*/
+ instruction->info.data_proc.variant = 0;/*immediate*/
instruction->info.data_proc.shifter_operand.immediate.immediate = imm;
- switch (opc)
- {
+ switch (opc) {
case 0:
instruction->type = ARM_MOV;
mnemonic = "MOVS";
return ERROR_OK;
}
-int evaluate_data_proc_thumb(uint16_t opcode, uint32_t address, arm_instruction_t *instruction)
+static int evaluate_data_proc_thumb(uint16_t opcode,
+ uint32_t address, struct arm_instruction *instruction)
{
- uint8_t high_reg, op, Rm, Rd,H1,H2;
+ uint8_t high_reg, op, Rm, Rd, H1, H2;
char *mnemonic = NULL;
bool nop = false;
instruction->info.data_proc.Rd = Rd;
instruction->info.data_proc.Rn = Rd;
instruction->info.data_proc.S = (!high_reg || (instruction->type == ARM_CMP));
- instruction->info.data_proc.variant = 1 /*immediate shift*/;
+ instruction->info.data_proc.variant = 1 /*immediate shift*/;
instruction->info.data_proc.shifter_operand.immediate_shift.Rm = Rm;
- if (high_reg)
- {
+ if (high_reg) {
Rd |= H1 << 3;
Rm |= H2 << 3;
op >>= 2;
- switch (op)
- {
+ switch (op) {
case 0x0:
instruction->type = ARM_ADD;
mnemonic = "ADD";
nop = true;
break;
case 0x3:
- if ((opcode & 0x7) == 0x0)
- {
+ if ((opcode & 0x7) == 0x0) {
instruction->info.b_bl_bx_blx.reg_operand = Rm;
- if (H1)
- {
+ if (H1) {
instruction->type = ARM_BLX;
snprintf(instruction->text, 128,
- "0x%8.8" PRIx32
- " 0x%4.4x \tBLX\tr%i",
- address, opcode, Rm);
- }
- else
- {
+ "0x%8.8" PRIx32
+ " 0x%4.4x \tBLX\tr%i",
+ address, opcode, Rm);
+ } else {
instruction->type = ARM_BX;
snprintf(instruction->text, 128,
- "0x%8.8" PRIx32
- " 0x%4.4x \tBX\tr%i",
- address, opcode, Rm);
+ "0x%8.8" PRIx32
+ " 0x%4.4x \tBX\tr%i",
+ address, opcode, Rm);
}
- }
- else
- {
+ } else {
instruction->type = ARM_UNDEFINED_INSTRUCTION;
snprintf(instruction->text, 128,
- "0x%8.8" PRIx32
- " 0x%4.4x \t"
- "UNDEFINED INSTRUCTION",
- address, opcode);
+ "0x%8.8" PRIx32
+ " 0x%4.4x \t"
+ "UNDEFINED INSTRUCTION",
+ address, opcode);
}
return ERROR_OK;
break;
}
- }
- else
- {
- switch (op)
- {
+ } else {
+ switch (op) {
case 0x0:
instruction->type = ARM_AND;
mnemonic = "ANDS";
case 0x2:
instruction->type = ARM_MOV;
mnemonic = "LSLS";
- instruction->info.data_proc.variant = 2 /*register shift*/;
+ instruction->info.data_proc.variant = 2 /*register shift*/;
instruction->info.data_proc.shifter_operand.register_shift.shift = 0;
instruction->info.data_proc.shifter_operand.register_shift.Rm = Rd;
instruction->info.data_proc.shifter_operand.register_shift.Rs = Rm;
case 0x3:
instruction->type = ARM_MOV;
mnemonic = "LSRS";
- instruction->info.data_proc.variant = 2 /*register shift*/;
+ instruction->info.data_proc.variant = 2 /*register shift*/;
instruction->info.data_proc.shifter_operand.register_shift.shift = 1;
instruction->info.data_proc.shifter_operand.register_shift.Rm = Rd;
instruction->info.data_proc.shifter_operand.register_shift.Rs = Rm;
case 0x4:
instruction->type = ARM_MOV;
mnemonic = "ASRS";
- instruction->info.data_proc.variant = 2 /*register shift*/;
+ instruction->info.data_proc.variant = 2 /*register shift*/;
instruction->info.data_proc.shifter_operand.register_shift.shift = 2;
instruction->info.data_proc.shifter_operand.register_shift.Rm = Rd;
instruction->info.data_proc.shifter_operand.register_shift.Rs = Rm;
case 0x7:
instruction->type = ARM_MOV;
mnemonic = "RORS";
- instruction->info.data_proc.variant = 2 /*register shift*/;
+ instruction->info.data_proc.variant = 2 /*register shift*/;
instruction->info.data_proc.shifter_operand.register_shift.shift = 3;
instruction->info.data_proc.shifter_operand.register_shift.Rm = Rd;
instruction->info.data_proc.shifter_operand.register_shift.Rs = Rm;
case 0x9:
instruction->type = ARM_RSB;
mnemonic = "RSBS";
- instruction->info.data_proc.variant = 0 /*immediate*/;
+ instruction->info.data_proc.variant = 0 /*immediate*/;
instruction->info.data_proc.shifter_operand.immediate.immediate = 0;
instruction->info.data_proc.Rn = Rm;
break;
snprintf(instruction->text, 128,
"0x%8.8" PRIx32 " 0x%4.4x \tNOP\t\t\t"
"; (%s r%i, r%i)",
- address, opcode, mnemonic, Rd, Rm);
+ address, opcode, mnemonic, Rd, Rm);
else
snprintf(instruction->text, 128,
"0x%8.8" PRIx32 " 0x%4.4x \t%s\tr%i, r%i",
- address, opcode, mnemonic, Rd, Rm);
+ address, opcode, mnemonic, Rd, Rm);
return ERROR_OK;
}
return (addr + 4) & ~3;
}
-int evaluate_load_literal_thumb(uint16_t opcode, uint32_t address, arm_instruction_t *instruction)
+static int evaluate_load_literal_thumb(uint16_t opcode,
+ uint32_t address, struct arm_instruction *instruction)
{
uint32_t immediate;
uint8_t Rd = (opcode >> 8) & 0x7;
instruction->info.load_store.Rd = Rd;
instruction->info.load_store.Rn = 15 /*PC*/;
- instruction->info.load_store.index_mode = 0; /*offset*/
- instruction->info.load_store.offset_mode = 0; /*immediate*/
+ instruction->info.load_store.index_mode = 0; /*offset*/
+ instruction->info.load_store.offset_mode = 0; /*immediate*/
instruction->info.load_store.offset.offset = immediate;
snprintf(instruction->text, 128,
- "0x%8.8" PRIx32 " 0x%4.4x \t"
- "LDR\tr%i, [pc, #%#" PRIx32 "]\t; %#8.8" PRIx32,
- address, opcode, Rd, immediate,
- thumb_alignpc4(address) + immediate);
+ "0x%8.8" PRIx32 " 0x%4.4x \t"
+ "LDR\tr%i, [pc, #%#" PRIx32 "]\t; %#8.8" PRIx32,
+ address, opcode, Rd, immediate,
+ thumb_alignpc4(address) + immediate);
return ERROR_OK;
}
-int evaluate_load_store_reg_thumb(uint16_t opcode, uint32_t address, arm_instruction_t *instruction)
+static int evaluate_load_store_reg_thumb(uint16_t opcode,
+ uint32_t address, struct arm_instruction *instruction)
{
uint8_t Rd = (opcode >> 0) & 0x7;
uint8_t Rn = (opcode >> 3) & 0x7;
uint8_t opc = (opcode >> 9) & 0x7;
char *mnemonic = NULL;
- switch (opc)
- {
+ switch (opc) {
case 0:
instruction->type = ARM_STR;
mnemonic = "STR";
instruction->info.load_store.Rd = Rd;
instruction->info.load_store.Rn = Rn;
- instruction->info.load_store.index_mode = 0; /*offset*/
- instruction->info.load_store.offset_mode = 1; /*register*/
+ instruction->info.load_store.index_mode = 0; /*offset*/
+ instruction->info.load_store.offset_mode = 1; /*register*/
instruction->info.load_store.offset.reg.Rm = Rm;
return ERROR_OK;
}
-int evaluate_load_store_imm_thumb(uint16_t opcode, uint32_t address, arm_instruction_t *instruction)
+static int evaluate_load_store_imm_thumb(uint16_t opcode,
+ uint32_t address, struct arm_instruction *instruction)
{
uint32_t offset = (opcode >> 6) & 0x1f;
uint8_t Rd = (opcode >> 0) & 0x7;
char suffix = ' ';
uint32_t shift = 2;
- if (L)
- {
+ if (L) {
instruction->type = ARM_LDR;
mnemonic = "LDR";
- }
- else
- {
+ } else {
instruction->type = ARM_STR;
mnemonic = "STR";
}
- if ((opcode&0xF000) == 0x8000)
- {
+ if ((opcode&0xF000) == 0x8000) {
suffix = 'H';
shift = 1;
- }
- else if (B)
- {
+ } else if (B) {
suffix = 'B';
shift = 0;
}
snprintf(instruction->text, 128,
- "0x%8.8" PRIx32 " 0x%4.4x \t%s%c\tr%i, [r%i, #%#" PRIx32 "]",
- address, opcode, mnemonic, suffix, Rd, Rn, offset << shift);
+ "0x%8.8" PRIx32 " 0x%4.4x \t%s%c\tr%i, [r%i, #%#" PRIx32 "]",
+ address, opcode, mnemonic, suffix, Rd, Rn, offset << shift);
instruction->info.load_store.Rd = Rd;
instruction->info.load_store.Rn = Rn;
- instruction->info.load_store.index_mode = 0; /*offset*/
- instruction->info.load_store.offset_mode = 0; /*immediate*/
+ instruction->info.load_store.index_mode = 0; /*offset*/
+ instruction->info.load_store.offset_mode = 0; /*immediate*/
instruction->info.load_store.offset.offset = offset << shift;
return ERROR_OK;
}
-int evaluate_load_store_stack_thumb(uint16_t opcode, uint32_t address, arm_instruction_t *instruction)
+static int evaluate_load_store_stack_thumb(uint16_t opcode,
+ uint32_t address, struct arm_instruction *instruction)
{
uint32_t offset = opcode & 0xff;
uint8_t Rd = (opcode >> 8) & 0x7;
uint32_t L = opcode & (1 << 11);
char *mnemonic;
- if (L)
- {
+ if (L) {
instruction->type = ARM_LDR;
mnemonic = "LDR";
- }
- else
- {
+ } else {
instruction->type = ARM_STR;
mnemonic = "STR";
}
snprintf(instruction->text, 128,
- "0x%8.8" PRIx32 " 0x%4.4x \t%s\tr%i, [SP, #%#" PRIx32 "]",
- address, opcode, mnemonic, Rd, offset*4);
+ "0x%8.8" PRIx32 " 0x%4.4x \t%s\tr%i, [SP, #%#" PRIx32 "]",
+ address, opcode, mnemonic, Rd, offset*4);
instruction->info.load_store.Rd = Rd;
instruction->info.load_store.Rn = 13 /*SP*/;
- instruction->info.load_store.index_mode = 0; /*offset*/
- instruction->info.load_store.offset_mode = 0; /*immediate*/
+ instruction->info.load_store.index_mode = 0; /*offset*/
+ instruction->info.load_store.offset_mode = 0; /*immediate*/
instruction->info.load_store.offset.offset = offset*4;
return ERROR_OK;
}
-int evaluate_add_sp_pc_thumb(uint16_t opcode, uint32_t address, arm_instruction_t *instruction)
+static int evaluate_add_sp_pc_thumb(uint16_t opcode,
+ uint32_t address, struct arm_instruction *instruction)
{
uint32_t imm = opcode & 0xff;
uint8_t Rd = (opcode >> 8) & 0x7;
uint8_t Rn;
uint32_t SP = opcode & (1 << 11);
- char *reg_name;
+ const char *reg_name;
instruction->type = ARM_ADD;
- if (SP)
- {
+ if (SP) {
reg_name = "SP";
Rn = 13;
- }
- else
- {
+ } else {
reg_name = "PC";
Rn = 15;
}
snprintf(instruction->text, 128,
- "0x%8.8" PRIx32 " 0x%4.4x \tADD\tr%i, %s, #%#" PRIx32,
- address, opcode, Rd, reg_name, imm * 4);
+ "0x%8.8" PRIx32 " 0x%4.4x \tADD\tr%i, %s, #%#" PRIx32,
+ address, opcode, Rd, reg_name, imm * 4);
- instruction->info.data_proc.variant = 0 /* immediate */;
+ instruction->info.data_proc.variant = 0 /* immediate */;
instruction->info.data_proc.Rd = Rd;
instruction->info.data_proc.Rn = Rn;
instruction->info.data_proc.shifter_operand.immediate.immediate = imm*4;
return ERROR_OK;
}
-int evaluate_adjust_stack_thumb(uint16_t opcode, uint32_t address, arm_instruction_t *instruction)
+static int evaluate_adjust_stack_thumb(uint16_t opcode,
+ uint32_t address, struct arm_instruction *instruction)
{
uint32_t imm = opcode & 0x7f;
uint8_t opc = opcode & (1 << 7);
char *mnemonic;
- if (opc)
- {
+ if (opc) {
instruction->type = ARM_SUB;
mnemonic = "SUB";
- }
- else
- {
+ } else {
instruction->type = ARM_ADD;
mnemonic = "ADD";
}
"0x%8.8" PRIx32 " 0x%4.4x \t%s\tSP, #%#" PRIx32,
address, opcode, mnemonic, imm*4);
- instruction->info.data_proc.variant = 0 /* immediate */;
+ instruction->info.data_proc.variant = 0 /* immediate */;
instruction->info.data_proc.Rd = 13 /*SP*/;
instruction->info.data_proc.Rn = 13 /*SP*/;
instruction->info.data_proc.shifter_operand.immediate.immediate = imm*4;
return ERROR_OK;
}
-int evaluate_breakpoint_thumb(uint16_t opcode, uint32_t address, arm_instruction_t *instruction)
+static int evaluate_breakpoint_thumb(uint16_t opcode,
+ uint32_t address, struct arm_instruction *instruction)
{
uint32_t imm = opcode & 0xff;
return ERROR_OK;
}
-int evaluate_load_store_multiple_thumb(uint16_t opcode, uint32_t address, arm_instruction_t *instruction)
+static int evaluate_load_store_multiple_thumb(uint16_t opcode,
+ uint32_t address, struct arm_instruction *instruction)
{
uint32_t reg_list = opcode & 0xff;
uint32_t L = opcode & (1 << 11);
char ptr_name[7] = "";
int i;
- if ((opcode & 0xf000) == 0xc000)
- { /* generic load/store multiple */
+ /* REVISIT: in ThumbEE mode, there are no LDM or STM instructions.
+ * The STMIA and LDMIA opcodes are used for other instructions.
+ */
+
+ if ((opcode & 0xf000) == 0xc000) { /* generic load/store multiple */
char *wback = "!";
- if (L)
- {
+ if (L) {
instruction->type = ARM_LDM;
mnemonic = "LDM";
if (opcode & (1 << Rn))
wback = "";
- }
- else
- {
+ } else {
instruction->type = ARM_STM;
mnemonic = "STM";
}
snprintf(ptr_name, sizeof ptr_name, "r%i%s, ", Rn, wback);
- }
- else
- { /* push/pop */
- Rn = 13; /* SP */
- if (L)
- {
+ } else {/* push/pop */
+ Rn = 13;/* SP */
+ if (L) {
instruction->type = ARM_LDM;
mnemonic = "POP";
if (R)
reg_list |= (1 << 15) /*PC*/;
- }
- else
- {
+ } else {
instruction->type = ARM_STM;
mnemonic = "PUSH";
- addr_mode = 3; /*DB*/
+ addr_mode = 3; /*DB*/
if (R)
reg_list |= (1 << 14) /*LR*/;
}
}
reg_names_p = reg_names;
- for (i = 0; i <= 15; i++)
- {
+ for (i = 0; i <= 15; i++) {
if (reg_list & (1 << i))
- reg_names_p += snprintf(reg_names_p, (reg_names + 40 - reg_names_p), "r%i, ", i);
+ reg_names_p += snprintf(reg_names_p,
+ (reg_names + 40 - reg_names_p),
+ "r%i, ",
+ i);
}
if (reg_names_p > reg_names)
reg_names_p[-2] = '\0';
- else /* invalid op : no registers */
+ else /* invalid op : no registers */
reg_names[0] = '\0';
snprintf(instruction->text, 128,
return ERROR_OK;
}
-int evaluate_cond_branch_thumb(uint16_t opcode, uint32_t address, arm_instruction_t *instruction)
+static int evaluate_cond_branch_thumb(uint16_t opcode,
+ uint32_t address, struct arm_instruction *instruction)
{
uint32_t offset = opcode & 0xff;
uint8_t cond = (opcode >> 8) & 0xf;
uint32_t target_address;
- if (cond == 0xf)
- {
+ if (cond == 0xf) {
instruction->type = ARM_SWI;
snprintf(instruction->text, 128,
"0x%8.8" PRIx32 " 0x%4.4x \tSVC\t%#2.2" PRIx32,
address, opcode, offset);
return ERROR_OK;
- }
- else if (cond == 0xe)
- {
+ } else if (cond == 0xe) {
instruction->type = ARM_UNDEFINED_INSTRUCTION;
snprintf(instruction->text, 128,
- "0x%8.8" PRIx32 " 0x%4.4x \tUNDEFINED INSTRUCTION",
- address, opcode);
+ "0x%8.8" PRIx32 " 0x%4.4x \tUNDEFINED INSTRUCTION",
+ address, opcode);
return ERROR_OK;
}
}
static int evaluate_cb_thumb(uint16_t opcode, uint32_t address,
- arm_instruction_t *instruction)
+ struct arm_instruction *instruction)
{
unsigned offset;
}
static int evaluate_extend_thumb(uint16_t opcode, uint32_t address,
- arm_instruction_t *instruction)
+ struct arm_instruction *instruction)
{
/* added in ARMv6 */
snprintf(instruction->text, 128,
}
static int evaluate_cps_thumb(uint16_t opcode, uint32_t address,
- arm_instruction_t *instruction)
+ struct arm_instruction *instruction)
{
/* added in ARMv6 */
if ((opcode & 0x0ff0) == 0x0650)
"0x%8.8" PRIx32 " 0x%4.4x \tSETEND %s",
address, opcode,
(opcode & 0x80) ? "BE" : "LE");
- else /* ASSUME (opcode & 0x0fe0) == 0x0660 */
+ else /* ASSUME (opcode & 0x0fe0) == 0x0660 */
snprintf(instruction->text, 128,
"0x%8.8" PRIx32 " 0x%4.4x \tCPSI%c\t%s%s%s",
address, opcode,
}
static int evaluate_byterev_thumb(uint16_t opcode, uint32_t address,
- arm_instruction_t *instruction)
+ struct arm_instruction *instruction)
{
char *suffix;
/* added in ARMv6 */
switch ((opcode >> 6) & 3) {
- case 0:
- suffix = "";
- break;
- case 1:
- suffix = "16";
- break;
- default:
- suffix = "SH";
- break;
+ case 0:
+ suffix = "";
+ break;
+ case 1:
+ suffix = "16";
+ break;
+ default:
+ suffix = "SH";
+ break;
}
snprintf(instruction->text, 128,
"0x%8.8" PRIx32 " 0x%4.4x \tREV%s\tr%d, r%d",
}
static int evaluate_hint_thumb(uint16_t opcode, uint32_t address,
- arm_instruction_t *instruction)
+ struct arm_instruction *instruction)
{
char *hint;
switch ((opcode >> 4) & 0x0f) {
- case 0:
- hint = "NOP";
- break;
- case 1:
- hint = "YIELD";
- break;
- case 2:
- hint = "WFE";
- break;
- case 3:
- hint = "WFI";
- break;
- case 4:
- hint = "SEV";
- break;
- default:
- hint = "HINT (UNRECOGNIZED)";
- break;
+ case 0:
+ hint = "NOP";
+ break;
+ case 1:
+ hint = "YIELD";
+ break;
+ case 2:
+ hint = "WFE";
+ break;
+ case 3:
+ hint = "WFI";
+ break;
+ case 4:
+ hint = "SEV";
+ break;
+ default:
+ hint = "HINT (UNRECOGNIZED)";
+ break;
}
snprintf(instruction->text, 128,
}
static int evaluate_ifthen_thumb(uint16_t opcode, uint32_t address,
- arm_instruction_t *instruction)
+ struct arm_instruction *instruction)
{
unsigned cond = (opcode >> 4) & 0x0f;
char *x = "", *y = "", *z = "";
return ERROR_OK;
}
-int thumb_evaluate_opcode(uint16_t opcode, uint32_t address, arm_instruction_t *instruction)
+int thumb_evaluate_opcode(uint16_t opcode, uint32_t address, struct arm_instruction *instruction)
{
/* clear fields, to avoid confusion */
- memset(instruction, 0, sizeof(arm_instruction_t));
+ memset(instruction, 0, sizeof(struct arm_instruction));
instruction->opcode = opcode;
instruction->instruction_size = 2;
- if ((opcode & 0xe000) == 0x0000)
- {
+ if ((opcode & 0xe000) == 0x0000) {
/* add/substract register or immediate */
if ((opcode & 0x1800) == 0x1800)
return evaluate_add_sub_thumb(opcode, address, instruction);
/* Add/substract/compare/move immediate */
if ((opcode & 0xe000) == 0x2000)
- {
return evaluate_data_proc_imm_thumb(opcode, address, instruction);
- }
/* Data processing instructions */
if ((opcode & 0xf800) == 0x4000)
- {
return evaluate_data_proc_thumb(opcode, address, instruction);
- }
/* Load from literal pool */
if ((opcode & 0xf800) == 0x4800)
- {
return evaluate_load_literal_thumb(opcode, address, instruction);
- }
/* Load/Store register offset */
if ((opcode & 0xf000) == 0x5000)
- {
return evaluate_load_store_reg_thumb(opcode, address, instruction);
- }
/* Load/Store immediate offset */
if (((opcode & 0xe000) == 0x6000)
- ||((opcode & 0xf000) == 0x8000))
- {
+ || ((opcode & 0xf000) == 0x8000))
return evaluate_load_store_imm_thumb(opcode, address, instruction);
- }
/* Load/Store from/to stack */
if ((opcode & 0xf000) == 0x9000)
- {
return evaluate_load_store_stack_thumb(opcode, address, instruction);
- }
/* Add to SP/PC */
if ((opcode & 0xf000) == 0xa000)
- {
return evaluate_add_sp_pc_thumb(opcode, address, instruction);
- }
/* Misc */
- if ((opcode & 0xf000) == 0xb000)
- {
+ if ((opcode & 0xf000) == 0xb000) {
switch ((opcode >> 8) & 0x0f) {
- case 0x0:
- return evaluate_adjust_stack_thumb(opcode, address, instruction);
- case 0x1:
- case 0x3:
- case 0x9:
- case 0xb:
- return evaluate_cb_thumb(opcode, address, instruction);
- case 0x2:
- return evaluate_extend_thumb(opcode, address, instruction);
- case 0x4:
- case 0x5:
- case 0xc:
- case 0xd:
- return evaluate_load_store_multiple_thumb(opcode, address,
- instruction);
- case 0x6:
- return evaluate_cps_thumb(opcode, address, instruction);
- case 0xa:
- if ((opcode & 0x00c0) == 0x0080)
- break;
- return evaluate_byterev_thumb(opcode, address, instruction);
- case 0xe:
- return evaluate_breakpoint_thumb(opcode, address, instruction);
- case 0xf:
- if (opcode & 0x000f)
- return evaluate_ifthen_thumb(opcode, address,
- instruction);
- else
- return evaluate_hint_thumb(opcode, address,
- instruction);
+ case 0x0:
+ return evaluate_adjust_stack_thumb(opcode, address, instruction);
+ case 0x1:
+ case 0x3:
+ case 0x9:
+ case 0xb:
+ return evaluate_cb_thumb(opcode, address, instruction);
+ case 0x2:
+ return evaluate_extend_thumb(opcode, address, instruction);
+ case 0x4:
+ case 0x5:
+ case 0xc:
+ case 0xd:
+ return evaluate_load_store_multiple_thumb(opcode, address,
+ instruction);
+ case 0x6:
+ return evaluate_cps_thumb(opcode, address, instruction);
+ case 0xa:
+ if ((opcode & 0x00c0) == 0x0080)
+ break;
+ return evaluate_byterev_thumb(opcode, address, instruction);
+ case 0xe:
+ return evaluate_breakpoint_thumb(opcode, address, instruction);
+ case 0xf:
+ if (opcode & 0x000f)
+ return evaluate_ifthen_thumb(opcode, address,
+ instruction);
+ else
+ return evaluate_hint_thumb(opcode, address,
+ instruction);
}
instruction->type = ARM_UNDEFINED_INSTRUCTION;
snprintf(instruction->text, 128,
- "0x%8.8" PRIx32 " 0x%4.4x \tUNDEFINED INSTRUCTION",
- address, opcode);
+ "0x%8.8" PRIx32 " 0x%4.4x \tUNDEFINED INSTRUCTION",
+ address, opcode);
return ERROR_OK;
}
/* Load/Store multiple */
if ((opcode & 0xf000) == 0xc000)
- {
return evaluate_load_store_multiple_thumb(opcode, address, instruction);
- }
/* Conditional branch + SWI */
if ((opcode & 0xf000) == 0xd000)
- {
return evaluate_cond_branch_thumb(opcode, address, instruction);
- }
- if ((opcode & 0xe000) == 0xe000)
- {
+ if ((opcode & 0xe000) == 0xe000) {
/* Undefined instructions */
- if ((opcode & 0xf801) == 0xe801)
- {
+ if ((opcode & 0xf801) == 0xe801) {
instruction->type = ARM_UNDEFINED_INSTRUCTION;
snprintf(instruction->text, 128,
"0x%8.8" PRIx32 " 0x%8.8x\t"
"UNDEFINED INSTRUCTION",
address, opcode);
return ERROR_OK;
- }
- else
- { /* Branch to offset */
+ } else /* Branch to offset */
return evaluate_b_bl_blx_thumb(opcode, address, instruction);
- }
}
- LOG_ERROR("should never reach this point (opcode=%04x)",opcode);
+ LOG_ERROR("Thumb: should never reach this point (opcode=%04x)", opcode);
return -1;
}
static int t2ev_b_bl(uint32_t opcode, uint32_t address,
- arm_instruction_t *instruction, char *cp)
+ struct arm_instruction *instruction, char *cp)
{
unsigned offset;
unsigned b21 = 1 << 21;
address += 4;
address += offset << 1;
- instruction->type = (opcode & (1 << 14)) ? ARM_BL : ARM_B;
+ char *inst;
+ switch ((opcode >> 12) & 0x5) {
+ case 0x1:
+ inst = "B.W";
+ instruction->type = ARM_B;
+ break;
+ case 0x4:
+ inst = "BLX";
+ instruction->type = ARM_BLX;
+ address &= 0xfffffffc;
+ break;
+ case 0x5:
+ inst = "BL";
+ instruction->type = ARM_BL;
+ break;
+ default:
+ return ERROR_COMMAND_SYNTAX_ERROR;
+ }
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);
+ sprintf(cp, "%s\t%#8.8" PRIx32, inst, address);
return ERROR_OK;
}
static int t2ev_cond_b(uint32_t opcode, uint32_t address,
- arm_instruction_t *instruction, char *cp)
+ struct arm_instruction *instruction, char *cp)
{
unsigned offset;
unsigned b17 = 1 << 17;
offset = opcode & 0x7ff;
offset |= (opcode & 0x003f0000) >> 5;
if (opcode & (1 << 26)) {
- offset |= 0xffff << 19;
+ offset |= 0x1fff << 19;
if ((opcode & (1 << 11)) == 0)
b17 = 0;
if ((opcode & (1 << 13)) == 0)
char *special = "(RESERVED)";
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;
+ 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;
}
return special;
}
static int t2ev_hint(uint32_t opcode, uint32_t address,
- arm_instruction_t *instruction, char *cp)
+ struct arm_instruction *instruction, char *cp)
{
const char *mnemonic;
}
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;
+ 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;
}
strcpy(cp, mnemonic);
return ERROR_OK;
}
static int t2ev_misc(uint32_t opcode, uint32_t address,
- arm_instruction_t *instruction, char *cp)
+ struct arm_instruction *instruction, char *cp)
{
const char *mnemonic;
switch ((opcode >> 4) & 0x0f) {
- case 2:
- mnemonic = "CLREX";
- break;
- case 4:
- mnemonic = "DSB";
- break;
- case 5:
- mnemonic = "DMB";
- break;
- case 6:
- mnemonic = "ISB";
- break;
- default:
- return ERROR_INVALID_ARGUMENTS;
- }
- strcpy(cp, mnemonic);
+ 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;
}
static int t2ev_b_misc(uint32_t opcode, uint32_t address,
- arm_instruction_t *instruction, char *cp)
+ struct arm_instruction *instruction, char *cp)
{
/* permanently undefined */
if ((opcode & 0x07f07000) == 0x07f02000) {
}
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;
+ case 0x1:
+ case 0x4:
+ case 0x5:
+ return t2ev_b_bl(opcode, address, instruction, cp);
+ case 0:
+ if (((opcode >> 23) & 0x07) != 0x07)
+ return t2ev_cond_b(opcode, address, instruction, cp);
+ if (opcode & (1 << 26))
+ goto undef;
+ break;
}
switch ((opcode >> 20) & 0x7f) {
- case 0x38:
- case 0x39:
- sprintf(cp, "MSR\t%s, r%d", special_name(opcode & 0xff),
+ 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 0x3e:
- case 0x3f:
- sprintf(cp, "MRS\tr%d, %s", (int) (opcode >> 8) & 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;
+ return ERROR_OK;
}
undef:
- return ERROR_INVALID_ARGUMENTS;
+ return ERROR_COMMAND_SYNTAX_ERROR;
}
static int t2ev_data_mod_immed(uint32_t opcode, uint32_t address,
- arm_instruction_t *instruction, char *cp)
+ struct arm_instruction *instruction, char *cp)
{
char *mnemonic = NULL;
int rn = (opcode >> 16) & 0xf;
/* "Modified" immediates */
switch (func >> 1) {
- case 0:
- break;
- case 2:
- immed <<= 8;
+ 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);
+ case 1:
+ immed += immed << 16;
+ break;
+ case 3:
+ immed += immed << 8;
+ immed += immed << 16;
+ break;
+ default:
+ immed |= 0x80;
+ immed = ror(immed, func);
}
if (opcode & (1 << 20))
suffix = "S";
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;
+ 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";
- } 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";
+ 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 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_INVALID_ARGUMENTS;
+ 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);
+ mnemonic, suffix2, rd, immed, immed);
else
sprintf(cp, "%s%s%s\tr%d, r%d, #%d\t; %#8.8x",
mnemonic, suffix, suffix2,
}
static int t2ev_data_immed(uint32_t opcode, uint32_t address,
- arm_instruction_t *instruction, char *cp)
+ struct arm_instruction *instruction, char *cp)
{
char *mnemonic = NULL;
int rn = (opcode >> 16) & 0xf;
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", rn, immed, immed);
- return ERROR_OK;
- case 0x10:
- case 0x12:
- is_signed = true;
- 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",
+ 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;
+ 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",
+ 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_INVALID_ARGUMENTS;
+ 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,
}
static int t2ev_store_single(uint32_t opcode, uint32_t address,
- arm_instruction_t *instruction, char *cp)
+ struct arm_instruction *instruction, char *cp)
{
unsigned op = (opcode >> 20) & 0xf;
char *size = "";
unsigned rt = (opcode >> 12) & 0x0f;
if (rn == 0xf)
- return ERROR_INVALID_ARGUMENTS;
+ 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_INVALID_ARGUMENTS;
+ /* 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]",
immed = opcode & 0x00ff;
switch (opcode & 0x700) {
- case 0x600:
- suffix = "T";
- break;
- case 0x000:
- case 0x200:
- return ERROR_INVALID_ARGUMENTS;
+ case 0x600:
+ suffix = "T";
+ break;
+ case 0x000:
+ case 0x200:
+ return ERROR_COMMAND_SYNTAX_ERROR;
}
/* two indexed modes will write back rn */
}
static int t2ev_mul32(uint32_t opcode, uint32_t address,
- arm_instruction_t *instruction, char *cp)
+ 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",
+ 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;
- 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_INVALID_ARGUMENTS;
+ break;
+ default:
+ return ERROR_COMMAND_SYNTAX_ERROR;
}
return ERROR_OK;
}
static int t2ev_mul64_div(uint32_t opcode, uint32_t address,
- arm_instruction_t *instruction, char *cp)
+ 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";
+ case 0x40:
+ case 0x60:
+ infix = "MLA";
/* FALLTHROUGH */
- case 0:
- case 0x20:
- sprintf(cp, "%c%sL\tr%d, r%d, r%d, r%d",
+ 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",
+ 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_INVALID_ARGUMENTS;
+ break;
+ default:
+ return ERROR_COMMAND_SYNTAX_ERROR;
}
return ERROR_OK;
}
static int t2ev_ldm_stm(uint32_t opcode, uint32_t address,
- arm_instruction_t *instruction, char *cp)
+ 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 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_INVALID_ARGUMENTS;
+ 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);
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,
- arm_instruction_t *instruction, char *cp)
+ struct arm_instruction *instruction, char *cp)
{
int op = (opcode >> 21) & 0xf;
int rd = (opcode >> 8) & 0xf;
char *mnemonic;
char *suffix = "";
- immed |= (opcode >> 10) & 0x7;
- if (opcode & (1 << 21))
+ immed |= (opcode >> 10) & 0x1c;
+ if (opcode & (1 << 20))
suffix = "S";
switch (op) {
- case 0:
- if (rd == 0xf) {
- if (!(opcode & (1 << 21)))
- return ERROR_INVALID_ARGUMENTS;
- instruction->type = ARM_TST;
- mnemonic = "TST";
- 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.W\tr%d, r%d",
- suffix, rd,
- (int) (opcode & 0xf));
- return ERROR_OK;
+ 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;
}
- mnemonic = "ROR";
- break;
+ goto immediate;
+ } else {
+ instruction->type = ARM_ORR;
+ mnemonic = "ORR";
}
- 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 << 21)))
- return ERROR_INVALID_ARGUMENTS;
- instruction->type = ARM_TEQ;
- mnemonic = "TEQ";
- goto two;
- }
- instruction->type = ARM_EOR;
- mnemonic = "EOR";
- break;
- case 8:
- if (rd == 0xf) {
- if (!(opcode & (1 << 21)))
- return ERROR_INVALID_ARGUMENTS;
- instruction->type = ARM_CMN;
- mnemonic = "CMN";
- 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_INVALID_ARGUMENTS;
- instruction->type = ARM_CMP;
- mnemonic = "CMP";
- goto two;
- }
- instruction->type = ARM_SUB;
- mnemonic = "SUB";
- break;
- case 0xe:
- instruction->type = ARM_RSB;
- mnemonic = "RSB";
- break;
- default:
- return ERROR_INVALID_ARGUMENTS;
+ 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));
+ 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";
- break;
- case 2:
- suffix = "ASR";
- break;
- case 3:
- if (immed == 0) {
- strcpy(cp, "RRX");
- return ERROR_OK;
- }
- suffix = "ROR";
- break;
+ 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));
+ 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);
+ mnemonic, suffix, rd,
+ (int) (opcode & 0xf), immed ? immed : 32);
return ERROR_OK;
}
static int t2ev_data_reg(uint32_t opcode, uint32_t address,
- arm_instruction_t *instruction, char *cp)
+ struct arm_instruction *instruction, char *cp)
{
char *mnemonic;
- char * suffix = "";
+ 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_INVALID_ARGUMENTS;
+ 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;
} else if (opcode & (1 << 7)) {
switch ((opcode >> 20) & 0xf) {
- case 0:
- case 1:
- case 4:
- case 5:
- switch ((opcode >> 4) & 0x3) {
+ case 0:
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",
+ 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_INVALID_ARGUMENTS;
- if (((opcode >> 12) & 0xf) != 0xf)
- return ERROR_INVALID_ARGUMENTS;
- if (!(opcode & (1 << 20)))
- return ERROR_INVALID_ARGUMENTS;
-
- 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_INVALID_ARGUMENTS;
- }
- sprintf(cp, "%s\tr%d, r%d",
+ 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_INVALID_ARGUMENTS;
+ break;
+ default:
+ return ERROR_COMMAND_SYNTAX_ERROR;
}
}
}
static int t2ev_load_word(uint32_t opcode, uint32_t address,
- arm_instruction_t *instruction, char *cp)
+ struct arm_instruction *instruction, char *cp)
{
int rn = (opcode >> 16) & 0xf;
int immed;
char *p1 = "]", *p2 = "";
if (!(opcode & 0x0500))
- return ERROR_INVALID_ARGUMENTS;
+ return ERROR_COMMAND_SYNTAX_ERROR;
immed = opcode & 0x00ff;
return ERROR_OK;
}
- return ERROR_INVALID_ARGUMENTS;
+ return ERROR_COMMAND_SYNTAX_ERROR;
}
static int t2ev_load_byte_hints(uint32_t opcode, uint32_t address,
- arm_instruction_t *instruction, char *cp)
+ struct arm_instruction *instruction, char *cp)
{
int rn = (opcode >> 16) & 0xf;
int rt = (opcode >> 12) & 0xf;
char *mnemonic;
switch ((opcode >> 23) & 0x3) {
- case 0:
- if ((rn & rt) == 0xf) {
+ 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) {
+ 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 & 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;
- immed = -immed;
-preload_immediate:
- p1 = (opcode & (1 << 21)) ? "W" : "";
- sprintf(cp, "PLD%s\t[r%d, #%d]\t; %#6.6x",
- p1, rn, immed, immed);
+ sprintf(cp, "LDRBT\tr%d, [r%d, #%d]\t; %#2.2x",
+ rt, rn, immed, immed);
return ERROR_OK;
}
- mnemonic = "LDRB";
+ 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 = "";
+ 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;
+ 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)
+ 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;
- 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) {
+ 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;
- immed = -immed; // pli
- sprintf(cp, "PLI\t[r%d, #%d]\t; -%#2.2x",
- rn, immed, -immed);
+ sprintf(cp, "LDRSBT\tr%d, [r%d, #%d]\t; %#2.2x",
+ rt, 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 ((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) {
+ 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;
- sprintf(cp, "PLI\t[r%d, #%d]\t; %#3.3" PRIx32,
- rn, immed, immed);
- return ERROR_OK;
- }
- if (rn == 0xf)
- goto ldrsb_literal;
- immed = opcode & 0xfff;
- mnemonic = "LDRSB";
- goto ldrxb_immediate_t2;
+ mnemonic = "LDRSB";
+ goto ldrxb_immediate_t2;
}
- return ERROR_INVALID_ARGUMENTS;
+ return ERROR_COMMAND_SYNTAX_ERROR;
}
static int t2ev_load_halfword(uint32_t opcode, uint32_t address,
- arm_instruction_t *instruction, char *cp)
+ struct arm_instruction *instruction, char *cp)
{
int rn = (opcode >> 16) & 0xf;
int rt = (opcode >> 12) & 0xf;
return ERROR_OK;
}
- return ERROR_INVALID_ARGUMENTS;
+ return ERROR_COMMAND_SYNTAX_ERROR;
}
/*
* always set. That means eventual arm_simulate_step() support for Thumb2
* will need work in this area.
*/
-int thumb2_opcode(target_t *target, uint32_t address, arm_instruction_t *instruction)
+int thumb2_opcode(struct target *target, uint32_t address, struct arm_instruction *instruction)
{
int retval;
uint16_t op;
address &= ~1;
/* clear fields, to avoid confusion */
- memset(instruction, 0, sizeof(arm_instruction_t));
+ memset(instruction, 0, sizeof(struct arm_instruction));
/* read first halfword, see if this is the only one */
retval = target_read_u16(target, address, &op);
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);
+ 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,
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);
retval = t2ev_data_shift(opcode, address, instruction, cp);
/* ARMv7-M: A5.3.12 Data processing (register)
- * and A5.3.13 Miscellaneous operations
+ * and A5.3.13 Miscellaneous operations
*/
else if ((opcode & 0x1f000000) == 0x1a000000)
retval = t2ev_data_reg(opcode, address, instruction, cp);
else if ((opcode & 0x1f800000) == 0x1b800000)
retval = t2ev_mul64_div(opcode, address, instruction, cp);
- /* FIXME decode more 32-bit instructions */
-
if (retval == ERROR_OK)
return retval;
- if (retval == ERROR_INVALID_ARGUMENTS) {
+ /*
+ * 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;
return ERROR_OK;
}
-int arm_access_size(arm_instruction_t *instruction)
+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))
- {
+ || (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))
- {
+ || (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))
- {
+ || (instruction->type == ARM_LDRT)
+ || (instruction->type == ARM_STR)
+ || (instruction->type == ARM_STRT))
return 4;
- }
else if ((instruction->type == ARM_LDRD)
- || (instruction->type == ARM_STRD))
- {
+ || (instruction->type == ARM_STRD))
return 8;
- }
- else
- {
- LOG_ERROR("BUG: instruction type %i isn't a load/store instruction", instruction->type);
+ else {
+ LOG_ERROR("BUG: instruction type %i isn't a load/store instruction",
+ instruction->type);
return 0;
}
}
Code Review / openocd.git / blobdiff