- keep additional information for decoded instructions
authordrath <drath@b42882b7-edfa-0310-969c-e2dbd0fdcd60>
Fri, 16 Jun 2006 16:19:08 +0000 (16:19 +0000)
committerdrath <drath@b42882b7-edfa-0310-969c-e2dbd0fdcd60>
Fri, 16 Jun 2006 16:19:08 +0000 (16:19 +0000)
git-svn-id: svn://svn.berlios.de/openocd/trunk@69 b42882b7-edfa-0310-969c-e2dbd0fdcd60

src/target/arm_disassembler.c
src/target/arm_disassembler.h

index 6e76cf3..04dcf4b 100644 (file)
@@ -70,6 +70,7 @@ int evaluate_blx_imm(u32 opcode, u32 address, arm_instruction_t *instruction)
 {
        int offset;
        u32 immediate;
+       u32 target_address;
        
        instruction->type = ARM_BLX;
        immediate = opcode & 0x00ffffff;
@@ -87,9 +88,12 @@ int evaluate_blx_imm(u32 opcode, u32 address, arm_instruction_t *instruction)
        if (opcode & 0x01000000)
                offset |= 0x2;
        
-       instruction->target_address = address + 8 + offset;
+       target_address = address + 8 + offset;
        
-       snprintf(instruction->text, 128, "0x%8.8x\t0x%8.8x\tBLX 0x%8.8x", address, opcode, instruction->target_address);
+       snprintf(instruction->text, 128, "0x%8.8x\t0x%8.8x\tBLX 0x%8.8x", 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;
 }
@@ -99,6 +103,7 @@ int evaluate_b_bl(u32 opcode, u32 address, arm_instruction_t *instruction)
        u8 L;
        u32 immediate;
        int offset;
+       u32 target_address;
        
        immediate = opcode & 0x00ffffff;
        L = (opcode & 0x01000000) >> 24;
@@ -112,7 +117,7 @@ int evaluate_b_bl(u32 opcode, u32 address, arm_instruction_t *instruction)
        /* shift two bits left */
        offset <<= 2;
        
-       instruction->target_address = address + 8 + offset;
+       target_address = address + 8 + offset;
 
        if (L)
                instruction->type = ARM_BL;
@@ -120,7 +125,10 @@ int evaluate_b_bl(u32 opcode, u32 address, arm_instruction_t *instruction)
                instruction->type = ARM_B;
        
        snprintf(instruction->text, 128, "0x%8.8x\t0x%8.8x\tB%s%s 0x%8.8x", address, opcode,
-                        (L) ? "L" : "", COND(opcode), instruction->target_address);
+                        (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;
 }
@@ -278,6 +286,10 @@ int evaluate_load_store(u32 opcode, u32 address, arm_instruction_t *instruction)
        /* base register */
        Rn = (opcode & 0xf0000) >> 16;
        
+       instruction->info.load_store.Rd = Rd;
+       instruction->info.load_store.Rn = Rn;
+       instruction->info.load_store.U = U;
+
        /* determine operation */
        if (L)
                operation = "LDR";
@@ -328,6 +340,9 @@ int evaluate_load_store(u32 opcode, u32 address, arm_instruction_t *instruction)
        {
                u32 offset_12 = (opcode & 0xfff);
                snprintf(offset, 32, "#%s0x%x", (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> */
        {
@@ -338,30 +353,46 @@ int evaluate_load_store(u32 opcode, u32 address, arm_instruction_t *instruction)
                shift = (opcode & 0x60) >> 5;
                Rm = (opcode & 0xf);
                
+               /* LSR encodes a shift by 32 bit as 0x0 */
+               if ((shift == 0x1) && (shift_imm == 0x0))
+                       shift_imm = 0x20;
+               
+               /* ASR encodes a shift by 32 bit as 0x0 */
+               if ((shift == 0x2) && (shift_imm == 0x0))
+                       shift_imm = 0x20;
+
+               /* ROR by 32 bit is actually a RRX */
+               if ((shift == 0x3) && (shift_imm == 0x0))
+                       shift = 0x4;
+               
+               instruction->info.load_store.offset_mode = 1;
+               instruction->info.load_store.offset.reg.Rm = 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> */
                {
                        snprintf(offset, 32, "%sr%i", (U) ? "" : "-", Rm);
                }
                else /* +-<Rm>, <Shift>, #<shift_imm> */
                {
-                       if (shift == 0x0) /* LSL */
-                       {
-                               snprintf(offset, 32, "%sr%i, LSL #0x%x", (U) ? "" : "-", Rm, shift_imm);
-                       }
-                       else if (shift == 0x1) /* LSR */
+                       switch (shift)
                        {
-                               snprintf(offset, 32, "%sr%i, LSR #0x%x", (U) ? "" : "-", Rm, shift_imm);
-                       }
-                       else if (shift == 0x2) /* ASR */
-                       {
-                               snprintf(offset, 32, "%sr%i, ASR #0x%x", (U) ? "" : "-", Rm, shift_imm);
-                       }
-                       else if (shift == 0x3) /* ROR or RRX */
-                       {
-                               if (shift_imm == 0x0) /* RRX */
-                                       snprintf(offset, 32, "%sr%i, RRX", (U) ? "" : "-", Rm);
-                               else
+                               case 0x0: /* LSL */
+                                       snprintf(offset, 32, "%sr%i, LSL #0x%x", (U) ? "" : "-", Rm, shift_imm);
+                                       break;
+                               case 0x1: /* LSR */
+                                       snprintf(offset, 32, "%sr%i, LSR #0x%x", (U) ? "" : "-", Rm, shift_imm);
+                                       break;
+                               case 0x2: /* ASR */
+                                       snprintf(offset, 32, "%sr%i, ASR #0x%x", (U) ? "" : "-", Rm, shift_imm);
+                                       break;
+                               case 0x3: /* ROR */
                                        snprintf(offset, 32, "%sr%i, ROR #0x%x", (U) ? "" : "-", Rm, shift_imm);
+                                       break;
+                               case 0x4: /* RRX */
+                                       snprintf(offset, 32, "%sr%i, RRX", (U) ? "" : "-", Rm);
+                                       break;
                        }
                }
        }
@@ -373,12 +404,16 @@ int evaluate_load_store(u32 opcode, u32 address, arm_instruction_t *instruction)
                        snprintf(instruction->text, 128, "0x%8.8x\t0x%8.8x\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%8.8x\t0x%8.8x\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 */
@@ -386,6 +421,8 @@ int evaluate_load_store(u32 opcode, u32 address, arm_instruction_t *instruction)
                snprintf(instruction->text, 128, "0x%8.8x\t0x%8.8x\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;
@@ -415,6 +452,10 @@ int evaluate_misc_load_store(u32 opcode, u32 address, arm_instruction_t *instruc
        /* base register */
        Rn = (opcode & 0xf0000) >> 16;
        
+       instruction->info.load_store.Rd = Rd;
+       instruction->info.load_store.Rn = Rn;
+       instruction->info.load_store.U = U;
+       
        /* determine instruction type and suffix */
        if (S) /* signed */
        {
@@ -467,12 +508,20 @@ int evaluate_misc_load_store(u32 opcode, u32 address, arm_instruction_t *instruc
        {
                u32 offset_8 = ((opcode & 0xf00) >> 4) | (opcode & 0xf);
                snprintf(offset, 32, "#%s0x%x", (U) ? "" : "-", offset_8);
+               
+               instruction->info.load_store.offset_mode = 0;
+               instruction->info.load_store.offset.offset = offset_8;
        }
        else /* Register offset/index (+-<Rm>) */
        {
                u8 Rm;
                Rm = (opcode & 0xf);
                snprintf(offset, 32, "%sr%i", (U) ? "" : "-", Rm);
+               
+               instruction->info.load_store.offset_mode = 1;
+               instruction->info.load_store.offset.reg.Rm = Rm;
+               instruction->info.load_store.offset.reg.shift = 0x0;
+               instruction->info.load_store.offset.reg.shift_imm = 0x0;
        }
        
        if (P == 1)
@@ -482,12 +531,16 @@ int evaluate_misc_load_store(u32 opcode, u32 address, arm_instruction_t *instruc
                        snprintf(instruction->text, 128, "0x%8.8x\t0x%8.8x\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%8.8x\t0x%8.8x\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 */
@@ -495,6 +548,8 @@ int evaluate_misc_load_store(u32 opcode, u32 address, arm_instruction_t *instruc
                snprintf(instruction->text, 128, "0x%8.8x\t0x%8.8x\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;
@@ -520,6 +575,11 @@ int evaluate_ldm_stm(u32 opcode, u32 address, arm_instruction_t *instruction)
        register_list = (opcode & 0xffff);
        Rn = (opcode & 0xf0000) >> 16;
        
+       instruction->info.load_store_multiple.Rn = Rn;
+       instruction->info.load_store_multiple.register_list = register_list;
+       instruction->info.load_store_multiple.S = S;
+       instruction->info.load_store_multiple.W = W;
+       
        if (L)
        {
                instruction->type = ARM_LDM;
@@ -534,16 +594,28 @@ int evaluate_ldm_stm(u32 opcode, u32 address, arm_instruction_t *instruction)
        if (P)
        {
                if (U)
+               {
+                       instruction->info.load_store_multiple.addressing_mode = 1;
                        addressing_mode = "IB";
+               }
                else
+               {
+                       instruction->info.load_store_multiple.addressing_mode = 3;
                        addressing_mode = "DB";
+               }
        }
        else
        {
                if (U)
+               {
+                       instruction->info.load_store_multiple.addressing_mode = 0;
                        addressing_mode = "IA";
+               }
                else
+               {
+                       instruction->info.load_store_multiple.addressing_mode = 2;
                        addressing_mode = "DA";
+               }
        }
        
        reg_list_p = reg_list;
@@ -733,6 +805,9 @@ int evaluate_misc_instr(u32 opcode, u32 address, arm_instruction_t *instruction)
                
                snprintf(instruction->text, 128, "0x%8.8x\t0x%8.8x\tBX%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 */
@@ -898,6 +973,10 @@ int evaluate_data_proc(u32 opcode, u32 address, arm_instruction_t *instruction)
        Rd = (opcode & 0xf000) >> 12;
        Rn = (opcode & 0xf0000) >> 16;
        
+       instruction->info.data_proc.Rd = Rd;
+       instruction->info.data_proc.Rn = Rn;
+       instruction->info.data_proc.S = S;
+
        switch (op)
        {
                case 0x0:
@@ -975,6 +1054,9 @@ int evaluate_data_proc(u32 opcode, u32 address, arm_instruction_t *instruction)
                immediate = ror(immed_8, rotate_imm * 2);
                
                snprintf(shifter_operand, 32, "#0x%x", immediate);
+               
+               instruction->info.data_proc.variant = 0;
+               instruction->info.data_proc.shifter_operand.immediate.immediate = immediate;
        }
        else /* register-based shifter operand */
        {
@@ -987,7 +1069,11 @@ int evaluate_data_proc(u32 opcode, u32 address, arm_instruction_t *instruction)
                        u8 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 = shift;
+               
                        if ((shift_imm == 0x0) && (shift == 0x0))
                        {
                                snprintf(shifter_operand, 32, "r%i", Rm);
@@ -1023,6 +1109,11 @@ int evaluate_data_proc(u32 opcode, u32 address, arm_instruction_t *instruction)
                {
                        u8 Rs = (opcode & 0xf00) >> 8;
                        
+                       instruction->info.data_proc.variant = 2;
+                       instruction->info.data_proc.shifter_operand.register_shift.Rm = Rm;
+                       instruction->info.data_proc.shifter_operand.register_shift.Rs = Rs;
+                       instruction->info.data_proc.shifter_operand.register_shift.shift = shift;
+                       
                        if (shift == 0x0) /* LSL */
                        {
                                snprintf(shifter_operand, 32, "r%i, LSL r%i", Rm, Rs);
index df84ba0..c6dc696 100644 (file)
@@ -120,15 +120,76 @@ enum arm_instruction_type
        ARM_UNDEFINED_INSTRUCTION = 0xffffffff,
 };
 
+typedef struct arm_b_bl_bx_blx_instr_s
+{
+       int reg_operand;
+       u32 target_address;
+} arm_b_bl_bx_blx_instr_t;
+
+typedef struct arm_data_proc_instr_s
+{
+       int variant; /* 0: immediate, 1: immediate_shift, 2: register_shift */
+       u8 S;
+       u8 Rn;
+       u8 Rd;
+       union
+       {
+               struct {
+                       u8 immediate;
+               } immediate;
+               struct {
+                       u8 Rm;
+                       u8 shift;
+                       u8 shift_imm;
+               } immediate_shift;
+               struct {
+                       u8 Rm;
+                       u8 shift;
+                       u8 Rs;
+               } register_shift;
+       } shifter_operand;
+} arm_data_proc_instr_t;
+
+typedef struct arm_load_store_instr_s
+{
+       u8 Rd;
+       u8 Rn;
+       u8 U;
+       int index_mode; /* 0: offset, 1: pre-indexed, 2: post-indexed */
+       int offset_mode; /* 0: immediate, 1: (scaled) register */
+       union
+       {
+               u32 offset;
+               struct {
+                       u8 Rm;
+                       u8 shift;
+                       u8 shift_imm;
+               } reg;
+       } offset;
+} arm_load_store_instr_t;
+
+typedef struct arm_load_store_multiple_instr_s
+{
+       u8 Rn;
+       u32 register_list;
+       u8 addressing_mode; /* 0: IA, 1: IB, 2: DA, 3: DB */
+       u8 S;
+       u8 W;
+} arm_load_store_multiple_instr_t;
+
 typedef struct arm_instruction_s
 {
        enum arm_instruction_type type;
        char text[128];
        u32 opcode;
        
-       /* target */
-       u32 target_address;
-       
+       union {
+               arm_b_bl_bx_blx_instr_t b_bl_bx_blx;
+               arm_data_proc_instr_t data_proc;
+               arm_load_store_instr_t load_store;
+               arm_load_store_multiple_instr_t load_store_multiple;
+       } info;
+
 } arm_instruction_t;
 
 extern int evaluate_opcode(u32 opcode, u32 address, arm_instruction_t *instruction);