| /* Disassemble V850 instructions. |
| Copyright 1996, 1997, 1998, 2000, 2001, 2002, 2003, 2005, 2007, 2010, |
| 2012 Free Software Foundation, Inc. |
| |
| This file is part of the GNU opcodes library. |
| |
| This library is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 3, or (at your option) |
| any later version. |
| |
| It is distributed in the hope that it will be useful, but WITHOUT |
| ANY WARRANTY; without even the implied warranty of MERCHANTABILITY |
| or FITNESS FOR A PARTICULAR PURPOSE. See the 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., 51 Franklin Street - Fifth Floor, Boston, |
| MA 02110-1301, USA. */ |
| |
| |
| #include "sysdep.h" |
| #include <stdio.h> |
| #include "opcode/v850.h" |
| #include "dis-asm.h" |
| #include "opintl.h" |
| |
| static const char *const v850_reg_names[] = |
| { |
| "r0", "r1", "r2", "sp", "gp", "r5", "r6", "r7", |
| "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", |
| "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23", |
| "r24", "r25", "r26", "r27", "r28", "r29", "ep", "lp" |
| }; |
| |
| static const char *const v850_sreg_names[] = |
| { |
| "eipc/vip/mpm", "eipsw/mpc", "fepc/tid", "fepsw/ppa", "ecr/vmecr", "psw/vmtid", |
| "sr6/fpsr/vmadr/dcc", "sr7/fpepc/dc0", |
| "sr8/fpst/vpecr/dcv1", "sr9/fpcc/vptid", "sr10/fpcfg/vpadr/spal", "sr11/spau", |
| "sr12/vdecr/ipa0l", "eiic/vdtid/ipa0u", "feic/ipa1l", "dbic/ipa1u", |
| "ctpc/ipa2l", "ctpsw/ipa2u", "dbpc/ipa3l", "dbpsw/ipa3u", "ctbp/dpa0l", |
| "dir/dpa0u", "bpc/dpa0u", "asid/dpa1l", |
| "bpav/dpa1u", "bpam/dpa2l", "bpdv/dpa2u", "bpdm/dpa3l", "eiwr/dpa3u", |
| "fewr", "dbwr", "bsel" |
| }; |
| |
| static const char *const v850_cc_names[] = |
| { |
| "v", "c/l", "z", "nh", "s/n", "t", "lt", "le", |
| "nv", "nc/nl", "nz", "h", "ns/p", "sa", "ge", "gt" |
| }; |
| |
| static const char *const v850_float_cc_names[] = |
| { |
| "f/t", "un/or", "eq/neq", "ueq/ogl", "olt/uge", "ult/oge", "ole/ugt", "ule/ogt", |
| "sf/st", "ngle/gle", "seq/sne", "ngl/gl", "lt/nlt", "nge/ge", "le/nle", "ngt/gt" |
| }; |
| |
| |
| static void |
| print_value (int flags, bfd_vma memaddr, struct disassemble_info *info, long value) |
| { |
| if (flags & V850_PCREL) |
| { |
| bfd_vma addr = value + memaddr; |
| info->print_address_func (addr, info); |
| } |
| else if (flags & V850_OPERAND_DISP) |
| { |
| if (flags & V850_OPERAND_SIGNED) |
| { |
| info->fprintf_func (info->stream, "%ld", value); |
| } |
| else |
| { |
| info->fprintf_func (info->stream, "%lu", value); |
| } |
| } |
| else if (flags & V850E_IMMEDIATE32) |
| { |
| info->fprintf_func (info->stream, "0x%lx", value); |
| } |
| else |
| { |
| if (flags & V850_OPERAND_SIGNED) |
| { |
| info->fprintf_func (info->stream, "%ld", value); |
| } |
| else |
| { |
| info->fprintf_func (info->stream, "%lu", value); |
| } |
| } |
| } |
| |
| static long |
| get_operand_value (const struct v850_operand *operand, |
| unsigned long insn, |
| int bytes_read, |
| bfd_vma memaddr, |
| struct disassemble_info * info, |
| bfd_boolean noerror, |
| int *invalid) |
| { |
| long value; |
| bfd_byte buffer[4]; |
| |
| if ((operand->flags & V850E_IMMEDIATE16) |
| || (operand->flags & V850E_IMMEDIATE16HI)) |
| { |
| int status = info->read_memory_func (memaddr + bytes_read, buffer, 2, info); |
| |
| if (status == 0) |
| { |
| value = bfd_getl16 (buffer); |
| |
| if (operand->flags & V850E_IMMEDIATE16HI) |
| value <<= 16; |
| |
| return value; |
| } |
| |
| if (!noerror) |
| info->memory_error_func (status, memaddr + bytes_read, info); |
| |
| return 0; |
| } |
| |
| if (operand->flags & V850E_IMMEDIATE23) |
| { |
| int status = info->read_memory_func (memaddr + 2, buffer, 4, info); |
| |
| if (status == 0) |
| { |
| value = bfd_getl32 (buffer); |
| |
| value = (operand->extract) (value, invalid); |
| |
| return value; |
| } |
| |
| if (!noerror) |
| info->memory_error_func (status, memaddr + bytes_read, info); |
| |
| return 0; |
| } |
| |
| if (operand->flags & V850E_IMMEDIATE32) |
| { |
| int status = info->read_memory_func (memaddr + bytes_read, buffer, 4, info); |
| |
| if (status == 0) |
| { |
| bytes_read += 4; |
| value = bfd_getl32 (buffer); |
| |
| return value; |
| } |
| |
| if (!noerror) |
| info->memory_error_func (status, memaddr + bytes_read, info); |
| |
| return 0; |
| } |
| |
| if (operand->extract) |
| value = (operand->extract) (insn, invalid); |
| else |
| { |
| if (operand->bits == -1) |
| value = (insn & operand->shift); |
| else |
| value = (insn >> operand->shift) & ((1 << operand->bits) - 1); |
| |
| if (operand->flags & V850_OPERAND_SIGNED) |
| value = ((long)(value << (sizeof (long)*8 - operand->bits)) |
| >> (sizeof (long)*8 - operand->bits)); |
| } |
| |
| return value; |
| } |
| |
| |
| static int |
| disassemble (bfd_vma memaddr, struct disassemble_info *info, int bytes_read, unsigned long insn) |
| { |
| struct v850_opcode *op = (struct v850_opcode *)v850_opcodes; |
| const struct v850_operand *operand; |
| int match = 0; |
| int target_processor; |
| |
| switch (info->mach) |
| { |
| case 0: |
| default: |
| target_processor = PROCESSOR_V850; |
| break; |
| |
| case bfd_mach_v850e: |
| target_processor = PROCESSOR_V850E; |
| break; |
| |
| case bfd_mach_v850e1: |
| target_processor = PROCESSOR_V850E; |
| break; |
| |
| case bfd_mach_v850e2: |
| target_processor = PROCESSOR_V850E2; |
| break; |
| |
| case bfd_mach_v850e2v3: |
| target_processor = PROCESSOR_V850E2V3; |
| break; |
| } |
| |
| /* If this is a two byte insn, then mask off the high bits. */ |
| if (bytes_read == 2) |
| insn &= 0xffff; |
| |
| /* Find the opcode. */ |
| while (op->name) |
| { |
| if ((op->mask & insn) == op->opcode |
| && (op->processors & target_processor) |
| && !(op->processors & PROCESSOR_OPTION_ALIAS)) |
| { |
| /* Code check start. */ |
| const unsigned char *opindex_ptr; |
| unsigned int opnum; |
| unsigned int memop; |
| |
| for (opindex_ptr = op->operands, opnum = 1; |
| *opindex_ptr != 0; |
| opindex_ptr++, opnum++) |
| { |
| int invalid = 0; |
| long value; |
| |
| operand = &v850_operands[*opindex_ptr]; |
| |
| value = get_operand_value (operand, insn, bytes_read, memaddr, info, 1, &invalid); |
| |
| if (invalid) |
| goto next_opcode; |
| |
| if ((operand->flags & V850_NOT_R0) && value == 0 && (op->memop) <=2) |
| goto next_opcode; |
| |
| if ((operand->flags & V850_NOT_SA) && value == 0xd) |
| goto next_opcode; |
| |
| if ((operand->flags & V850_NOT_IMM0) && value == 0) |
| goto next_opcode; |
| } |
| |
| /* Code check end. */ |
| |
| match = 1; |
| (*info->fprintf_func) (info->stream, "%s\t", op->name); |
| #if 0 |
| fprintf (stderr, "match: insn: %lx, mask: %lx, opcode: %lx, name: %s\n", |
| insn, op->mask, op->opcode, op->name ); |
| #endif |
| |
| memop = op->memop; |
| /* Now print the operands. |
| |
| MEMOP is the operand number at which a memory |
| address specification starts, or zero if this |
| instruction has no memory addresses. |
| |
| A memory address is always two arguments. |
| |
| This information allows us to determine when to |
| insert commas into the output stream as well as |
| when to insert disp[reg] expressions onto the |
| output stream. */ |
| |
| for (opindex_ptr = op->operands, opnum = 1; |
| *opindex_ptr != 0; |
| opindex_ptr++, opnum++) |
| { |
| bfd_boolean square = FALSE; |
| long value; |
| int flag; |
| char *prefix; |
| |
| operand = &v850_operands[*opindex_ptr]; |
| |
| value = get_operand_value (operand, insn, bytes_read, memaddr, info, 0, 0); |
| |
| /* The first operand is always output without any |
| special handling. |
| |
| For the following arguments: |
| |
| If memop && opnum == memop + 1, then we need '[' since |
| we're about to output the register used in a memory |
| reference. |
| |
| If memop && opnum == memop + 2, then we need ']' since |
| we just finished the register in a memory reference. We |
| also need a ',' before this operand. |
| |
| Else we just need a comma. |
| |
| We may need to output a trailing ']' if the last operand |
| in an instruction is the register for a memory address. |
| |
| The exception (and there's always an exception) is the |
| "jmp" insn which needs square brackets around it's only |
| register argument. */ |
| prefix = ""; |
| if (operand->flags & V850_OPERAND_BANG) |
| { |
| prefix = "!"; |
| } |
| else if (operand->flags & V850_OPERAND_PERCENT) |
| { |
| prefix = "%"; |
| } |
| |
| if (opnum == 1 && opnum == memop) |
| { |
| info->fprintf_func (info->stream, "%s[", prefix); |
| square = TRUE; |
| } |
| else if (opnum > 1 |
| && (v850_operands[*(opindex_ptr - 1)].flags & V850_OPERAND_DISP) != 0 |
| && opnum == memop) |
| { |
| info->fprintf_func (info->stream, "%s[", prefix); |
| square = TRUE; |
| } |
| else if (opnum > 1) |
| info->fprintf_func (info->stream, ", %s", prefix); |
| |
| /* Extract the flags, ignoring ones which do not effect disassembly output. */ |
| flag = operand->flags & (V850_OPERAND_REG |
| | V850_REG_EVEN |
| | V850_OPERAND_EP |
| | V850_OPERAND_SRG |
| | V850E_OPERAND_REG_LIST |
| | V850_OPERAND_CC |
| | V850_OPERAND_FLOAT_CC); |
| |
| switch (flag) |
| { |
| case V850_OPERAND_REG: info->fprintf_func (info->stream, "%s", v850_reg_names[value]); break; |
| case (V850_OPERAND_REG|V850_REG_EVEN): info->fprintf_func (info->stream, "%s", v850_reg_names[value*2]); break; |
| case V850_OPERAND_EP: info->fprintf_func (info->stream, "ep"); break; |
| case V850_OPERAND_SRG: info->fprintf_func (info->stream, "%s", v850_sreg_names[value]); break; |
| |
| case V850E_OPERAND_REG_LIST: |
| { |
| static int list12_regs[32] = { 30, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
| 0, 0, 0, 0, 0, 31, 29, 28, 23, 22, 21, 20, 27, 26, 25, 24 }; |
| int *regs; |
| int i; |
| unsigned long int mask = 0; |
| int pc = 0; |
| |
| |
| switch (operand->shift) |
| { |
| case 0xffe00001: regs = list12_regs; break; |
| default: |
| /* xgettext:c-format */ |
| fprintf (stderr, _("unknown operand shift: %x\n"), operand->shift ); |
| abort (); |
| } |
| |
| for (i = 0; i < 32; i++) |
| { |
| if (value & (1 << i)) |
| { |
| switch (regs[ i ]) |
| { |
| default: mask |= (1 << regs[ i ]); break; |
| /* xgettext:c-format */ |
| case 0: fprintf (stderr, _("unknown reg: %d\n"), i ); abort (); |
| case -1: pc = 1; break; |
| } |
| } |
| } |
| |
| info->fprintf_func (info->stream, "{"); |
| |
| if (mask || pc) |
| { |
| if (mask) |
| { |
| unsigned int bit; |
| int shown_one = 0; |
| |
| for (bit = 0; bit < 32; bit++) |
| if (mask & (1 << bit)) |
| { |
| unsigned long int first = bit; |
| unsigned long int last; |
| |
| if (shown_one) |
| info->fprintf_func (info->stream, ", "); |
| else |
| shown_one = 1; |
| |
| info->fprintf_func (info->stream, v850_reg_names[first]); |
| |
| for (bit++; bit < 32; bit++) |
| if ((mask & (1 << bit)) == 0) |
| break; |
| |
| last = bit; |
| |
| if (last > first + 1) |
| { |
| info->fprintf_func (info->stream, " - %s", v850_reg_names[ last - 1 ]); |
| } |
| } |
| } |
| |
| if (pc) |
| info->fprintf_func (info->stream, "%sPC", mask ? ", " : ""); |
| } |
| |
| info->fprintf_func (info->stream, "}"); |
| } |
| break; |
| |
| case V850_OPERAND_CC: info->fprintf_func (info->stream, "%s", v850_cc_names[value]); break; |
| case V850_OPERAND_FLOAT_CC: info->fprintf_func (info->stream, "%s", v850_float_cc_names[value]); break; |
| |
| default: |
| print_value (operand->flags, memaddr, info, value); |
| break; |
| } |
| |
| if (square) |
| (*info->fprintf_func) (info->stream, "]"); |
| } |
| |
| /* All done. */ |
| break; |
| } |
| next_opcode: |
| op++; |
| } |
| |
| return match; |
| } |
| |
| int |
| print_insn_v850 (bfd_vma memaddr, struct disassemble_info * info) |
| { |
| int status, status2, match; |
| bfd_byte buffer[8]; |
| int length = 0, code_length = 0; |
| unsigned long insn = 0, insn2 = 0; |
| int target_processor; |
| |
| switch (info->mach) |
| { |
| case 0: |
| default: |
| target_processor = PROCESSOR_V850; |
| break; |
| |
| case bfd_mach_v850e: |
| target_processor = PROCESSOR_V850E; |
| break; |
| |
| case bfd_mach_v850e1: |
| target_processor = PROCESSOR_V850E; |
| break; |
| |
| case bfd_mach_v850e2: |
| target_processor = PROCESSOR_V850E2; |
| break; |
| |
| case bfd_mach_v850e2v3: |
| target_processor = PROCESSOR_V850E2V3; |
| break; |
| } |
| |
| status = info->read_memory_func (memaddr, buffer, 2, info); |
| |
| if (status) |
| { |
| info->memory_error_func (status, memaddr, info); |
| return -1; |
| } |
| |
| insn = bfd_getl16 (buffer); |
| |
| status2 = info->read_memory_func (memaddr+2, buffer, 2 , info); |
| |
| if (!status2) |
| { |
| insn2 = bfd_getl16 (buffer); |
| /* fprintf (stderr, "insn2 0x%08lx\n", insn2); */ |
| } |
| |
| /* Special case. */ |
| if (length == 0 |
| && (target_processor == PROCESSOR_V850E2 |
| || target_processor == PROCESSOR_V850E2V3)) |
| { |
| if ((insn & 0xffff) == 0x02e0 /* jr 32bit */ |
| && !status2 && (insn2 & 0x1) == 0) |
| { |
| length = 2; |
| code_length = 6; |
| } |
| else if ((insn & 0xffe0) == 0x02e0 /* jarl 32bit */ |
| && !status2 && (insn2 & 0x1) == 0) |
| { |
| length = 2; |
| code_length = 6; |
| } |
| else if ((insn & 0xffe0) == 0x06e0 /* jmp 32bit */ |
| && !status2 && (insn2 & 0x1) == 0) |
| { |
| length = 2; |
| code_length = 6; |
| } |
| } |
| |
| if (length == 0 |
| && target_processor == PROCESSOR_V850E2V3) |
| { |
| if (((insn & 0xffe0) == 0x0780 /* ld.b 23bit */ |
| && !status2 && (insn2 & 0x000f) == 0x0005) |
| || ((insn & 0xffe0) == 0x07a0 /* ld.bu 23bit */ |
| && !status2 && (insn2 & 0x000f) == 0x0005) |
| || ((insn & 0xffe0) == 0x0780 /* ld.h 23bit */ |
| && !status2 && (insn2 & 0x000f) == 0x0007) |
| || ((insn & 0xffe0) == 0x07a0 /* ld.hu 23bit */ |
| && !status2 && (insn2 & 0x000f) == 0x0007) |
| || ((insn & 0xffe0) == 0x0780 /* ld.w 23bit */ |
| && !status2 && (insn2 & 0x000f) == 0x0009)) |
| { |
| length = 4; |
| code_length = 6; |
| } |
| else if (((insn & 0xffe0) == 0x0780 /* st.b 23bit */ |
| && !status2 && (insn2 & 0x000f) == 0x000d) |
| || ((insn & 0xffe0) == 0x07a0 /* st.h 23bit */ |
| && !status2 && (insn2 & 0x000f) == 0x000d) |
| || ((insn & 0xffe0) == 0x0780 /* st.w 23bit */ |
| && !status2 && (insn2 & 0x000f) == 0x000f)) |
| { |
| length = 4; |
| code_length = 6; |
| } |
| } |
| |
| if (length == 0 |
| && target_processor != PROCESSOR_V850) |
| { |
| if ((insn & 0xffe0) == 0x0620) /* 32 bit MOV */ |
| { |
| length = 2; |
| code_length = 6; |
| } |
| else if ((insn & 0xffc0) == 0x0780 /* prepare {list}, imm5, imm16<<16 */ |
| && !status2 && (insn2 & 0x001f) == 0x0013) |
| { |
| length = 4; |
| code_length = 6; |
| } |
| else if ((insn & 0xffc0) == 0x0780 /* prepare {list}, imm5, imm16 */ |
| && !status2 && (insn2 & 0x001f) == 0x000b) |
| { |
| length = 4; |
| code_length = 6; |
| } |
| else if ((insn & 0xffc0) == 0x0780 /* prepare {list}, imm5, imm32 */ |
| && !status2 && (insn2 & 0x001f) == 0x001b) |
| { |
| length = 4; |
| code_length = 8; |
| } |
| } |
| |
| if (length == 4 |
| || (length == 0 |
| && (insn & 0x0600) == 0x0600)) |
| { |
| /* This is a 4 byte insn. */ |
| status = info->read_memory_func (memaddr, buffer, 4, info); |
| if (!status) |
| { |
| insn = bfd_getl32 (buffer); |
| |
| if (!length) |
| length = code_length = 4; |
| } |
| } |
| |
| if (code_length > length) |
| { |
| status = info->read_memory_func (memaddr + length, buffer, code_length - length, info); |
| if (status) |
| length = 0; |
| } |
| |
| if (length == 0 && !status) |
| length = code_length = 2; |
| |
| if (length == 2) |
| insn &= 0xffff; |
| |
| match = disassemble (memaddr, info, length, insn); |
| |
| if (!match) |
| { |
| int l = 0; |
| |
| status = info->read_memory_func (memaddr, buffer, code_length, info); |
| |
| while (l < code_length) |
| { |
| if (code_length - l == 2) |
| { |
| insn = bfd_getl16 (buffer + l) & 0xffff; |
| info->fprintf_func (info->stream, ".short\t0x%04lx", insn); |
| l += 2; |
| } |
| else |
| { |
| insn = bfd_getl32 (buffer + l); |
| info->fprintf_func (info->stream, ".long\t0x%08lx", insn); |
| l += 4; |
| } |
| } |
| } |
| |
| return code_length; |
| } |