diff options
author | drath <drath@b42882b7-edfa-0310-969c-e2dbd0fdcd60> | 2006-06-16 16:19:08 +0000 |
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committer | drath <drath@b42882b7-edfa-0310-969c-e2dbd0fdcd60> | 2006-06-16 16:19:08 +0000 |
commit | 1f76f6999974a3a1765aaa96fecc3f2433e7b5b6 (patch) | |
tree | 6e72888a73b484eff36b3ed0a7605cbb06a10dc6 /src/target | |
parent | b9628accd6da0aef6a9fc03efb96e05afab99c99 (diff) | |
download | riscv-openocd-1f76f6999974a3a1765aaa96fecc3f2433e7b5b6.zip riscv-openocd-1f76f6999974a3a1765aaa96fecc3f2433e7b5b6.tar.gz riscv-openocd-1f76f6999974a3a1765aaa96fecc3f2433e7b5b6.tar.bz2 |
- keep additional information for decoded instructions
git-svn-id: svn://svn.berlios.de/openocd/trunk@69 b42882b7-edfa-0310-969c-e2dbd0fdcd60
Diffstat (limited to 'src/target')
-rw-r--r-- | src/target/arm_disassembler.c | 133 | ||||
-rw-r--r-- | src/target/arm_disassembler.h | 67 |
2 files changed, 176 insertions, 24 deletions
diff --git a/src/target/arm_disassembler.c b/src/target/arm_disassembler.c index 6e76cf3..04dcf4b 100644 --- a/src/target/arm_disassembler.c +++ b/src/target/arm_disassembler.c @@ -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); diff --git a/src/target/arm_disassembler.h b/src/target/arm_disassembler.h index df84ba0..c6dc696 100644 --- a/src/target/arm_disassembler.h +++ b/src/target/arm_disassembler.h @@ -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); |