| /* Disassemble V850 instructions. |
| Copyright 1996, 1997, 1998, 2000, 2001 Free Software Foundation, Inc. |
| |
| This program 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 2 of the License, or |
| (at your option) any later version. |
| |
| This program 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
| |
| |
| #include <stdio.h> |
| |
| #include "sysdep.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", "eipsw", "fepc", "fepsw", "ecr", "psw", "sr6", "sr7", |
| "sr8", "sr9", "sr10", "sr11", "sr12", "sr13", "sr14", "sr15", |
| "ctpc", "ctpsw", "dbpc", "dbpsw", "ctbp", "sr21", "sr22", "sr23", |
| "sr24", "sr25", "sr26", "sr27", "sr28", "sr29", "sr30", "sr31", |
| "sr16", "sr17", "sr18", "sr19", "sr20", "sr21", "sr22", "sr23", |
| "sr24", "sr25", "sr26", "sr27", "sr28", "sr29", "sr30", "sr31" }; |
| |
| 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 int disassemble |
| PARAMS ((bfd_vma, struct disassemble_info *, unsigned long)); |
| |
| static int |
| disassemble (memaddr, info, insn) |
| bfd_vma memaddr; |
| struct disassemble_info *info; |
| unsigned long insn; |
| { |
| struct v850_opcode * op = (struct v850_opcode *)v850_opcodes; |
| const struct v850_operand * operand; |
| int match = 0; |
| int short_op = ((insn & 0x0600) != 0x0600); |
| int bytes_read; |
| int target_processor; |
| |
| /* Special case: 32 bit MOV */ |
| if ((insn & 0xffe0) == 0x0620) |
| short_op = true; |
| |
| bytes_read = short_op ? 2 : 4; |
| |
| /* If this is a two byte insn, then mask off the high bits. */ |
| if (short_op) |
| insn &= 0xffff; |
| |
| switch (info->mach) |
| { |
| case 0: |
| default: |
| target_processor = PROCESSOR_V850; |
| break; |
| |
| case bfd_mach_v850e: |
| target_processor = PROCESSOR_V850E; |
| break; |
| } |
| |
| /* Find the opcode. */ |
| while (op->name) |
| { |
| if ((op->mask & insn) == op->opcode |
| && (op->processors & target_processor)) |
| { |
| const unsigned char * opindex_ptr; |
| unsigned int opnum; |
| unsigned int memop; |
| |
| match = 1; |
| (*info->fprintf_func) (info->stream, "%s\t", op->name); |
| /*fprintf (stderr, "match: mask: %x insn: %x, opcode: %x, name: %s\n", op->mask, insn, op->opcode, op->name );*/ |
| |
| 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++) |
| { |
| long value; |
| int flag; |
| int status; |
| bfd_byte buffer[ 4 ]; |
| |
| operand = &v850_operands[*opindex_ptr]; |
| |
| if (operand->extract) |
| value = (operand->extract) (insn, 0); |
| 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 << (32 - operand->bits)) |
| >> (32 - operand->bits)); |
| } |
| |
| /* 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. */ |
| |
| if (memop && opnum == memop + 1) info->fprintf_func (info->stream, "["); |
| else if (memop && opnum == memop + 2) info->fprintf_func (info->stream, "],"); |
| else if (memop == 1 && opnum == 1 |
| && (operand->flags & V850_OPERAND_REG)) |
| info->fprintf_func (info->stream, "["); |
| else if (opnum > 1) info->fprintf_func (info->stream, ", "); |
| |
| /* extract the flags, ignorng ones which do not effect disassembly output. */ |
| flag = operand->flags; |
| flag &= ~ V850_OPERAND_SIGNED; |
| flag &= ~ V850_OPERAND_RELAX; |
| flag &= - flag; |
| |
| switch (flag) |
| { |
| case V850_OPERAND_REG: info->fprintf_func (info->stream, "%s", v850_reg_names[value]); break; |
| case V850_OPERAND_SRG: info->fprintf_func (info->stream, "%s", v850_sreg_names[value]); break; |
| case V850_OPERAND_CC: info->fprintf_func (info->stream, "%s", v850_cc_names[value]); break; |
| case V850_OPERAND_EP: info->fprintf_func (info->stream, "ep"); break; |
| default: info->fprintf_func (info->stream, "%d", value); break; |
| case V850_OPERAND_DISP: |
| { |
| bfd_vma addr = value + memaddr; |
| |
| /* On the v850 the top 8 bits of an address are used by an overlay manager. |
| Thus it may happen that when we are looking for a symbol to match |
| against an address with some of its top bits set, the search fails to |
| turn up an exact match. In this case we try to find an exact match |
| against a symbol in the lower address space, and if we find one, we |
| use that address. We only do this for JARL instructions however, as |
| we do not want to misinterpret branch instructions. */ |
| if (operand->bits == 22) |
| { |
| if ( ! info->symbol_at_address_func (addr, info) |
| && ((addr & 0xFF000000) != 0) |
| && info->symbol_at_address_func (addr & 0x00FFFFFF, info)) |
| { |
| addr &= 0x00FFFFFF; |
| } |
| } |
| info->print_address_func (addr, info); |
| break; |
| } |
| |
| case V850E_PUSH_POP: |
| { |
| 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 }; |
| static int list18_h_regs[32] = { 19, 18, 17, 16, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1, 30, 31, 29, 28, 23, 22, 21, 20, 27, 26, 25, 24 }; |
| static int list18_l_regs[32] = { 3, 2, 1, -2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1, 14, 15, 13, 12, 7, 6, 5, 4, 11, 10, 9, 8 }; |
| int * regs; |
| int i; |
| unsigned long int mask = 0; |
| int pc = false; |
| int sr = false; |
| |
| |
| switch (operand->shift) |
| { |
| case 0xffe00001: regs = list12_regs; break; |
| case 0xfff8000f: regs = list18_h_regs; break; |
| case 0xfff8001f: regs = list18_l_regs; value &= ~0x10; break; /* Do not include magic bit */ |
| 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 pop reg: %d\n"), i ); abort(); |
| case -1: pc = true; break; |
| case -2: sr = true; break; |
| } |
| } |
| } |
| |
| info->fprintf_func (info->stream, "{"); |
| |
| if (mask || pc || sr) |
| { |
| if (mask) |
| { |
| unsigned int bit; |
| int shown_one = false; |
| |
| 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 = true; |
| |
| 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 ? ", " : ""); |
| if (sr) |
| info->fprintf_func (info->stream, "%sSR", (mask || pc) ? ", " : ""); |
| } |
| |
| info->fprintf_func (info->stream, "}"); |
| } |
| break; |
| |
| case V850E_IMMEDIATE16: |
| status = info->read_memory_func (memaddr + bytes_read, buffer, 2, info); |
| if (status == 0) |
| { |
| bytes_read += 2; |
| value = bfd_getl16 (buffer); |
| |
| /* If this is a DISPOSE instruction with ff set to 0x10, then shift value up by 16. */ |
| if ((insn & 0x001fffc0) == 0x00130780) |
| value <<= 16; |
| |
| info->fprintf_func (info->stream, "0x%x", value); |
| } |
| else |
| { |
| info->memory_error_func (status, memaddr + bytes_read, info); |
| } |
| break; |
| |
| case V850E_IMMEDIATE32: |
| status = info->read_memory_func (memaddr + bytes_read, buffer, 4, info); |
| if (status == 0) |
| { |
| bytes_read += 4; |
| value = bfd_getl32 (buffer); |
| info->fprintf_func (info->stream, "0x%lx", value); |
| } |
| else |
| { |
| info->memory_error_func (status, memaddr + bytes_read, info); |
| } |
| break; |
| } |
| |
| /* Handle jmp correctly. */ |
| if (memop == 1 && opnum == 1 |
| && ((operand->flags & V850_OPERAND_REG) != 0)) |
| (*info->fprintf_func) (info->stream, "]"); |
| } |
| |
| /* Close any square bracket we left open. */ |
| if (memop && opnum == memop + 2) |
| (*info->fprintf_func) (info->stream, "]"); |
| |
| /* All done. */ |
| break; |
| } |
| op++; |
| } |
| |
| if (!match) |
| { |
| if (short_op) |
| info->fprintf_func (info->stream, ".short\t0x%04x", insn); |
| else |
| info->fprintf_func (info->stream, ".long\t0x%08x", insn); |
| } |
| |
| return bytes_read; |
| } |
| |
| int |
| print_insn_v850 (memaddr, info) |
| bfd_vma memaddr; |
| struct disassemble_info * info; |
| { |
| int status; |
| bfd_byte buffer[ 4 ]; |
| unsigned long insn = 0; |
| |
| /* First figure out how big the opcode is. */ |
| |
| status = info->read_memory_func (memaddr, buffer, 2, info); |
| if (status == 0) |
| { |
| insn = bfd_getl16 (buffer); |
| |
| if ( (insn & 0x0600) == 0x0600 |
| && (insn & 0xffe0) != 0x0620) |
| { |
| /* If this is a 4 byte insn, read 4 bytes of stuff. */ |
| status = info->read_memory_func (memaddr, buffer, 4, info); |
| |
| if (status == 0) |
| insn = bfd_getl32 (buffer); |
| } |
| } |
| |
| if (status != 0) |
| { |
| info->memory_error_func (status, memaddr, info); |
| return -1; |
| } |
| |
| /* Make sure we tell our caller how many bytes we consumed. */ |
| return disassemble (memaddr, info, insn); |
| } |