1341 lines
31 KiB
C
1341 lines
31 KiB
C
/* tc-mn10200.c -- Assembler code for the Matsushita 10200
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Copyright 1996-2013 Free Software Foundation, Inc.
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This file is part of GAS, the GNU Assembler.
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GAS is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3, or (at your option)
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any later version.
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GAS is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GAS; see the file COPYING. If not, write to
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the Free Software Foundation, 51 Franklin Street - Fifth Floor,
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Boston, MA 02110-1301, USA. */
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#include "as.h"
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#include "safe-ctype.h"
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#include "subsegs.h"
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#include "opcode/mn10200.h"
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/* Structure to hold information about predefined registers. */
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struct reg_name
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{
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const char *name;
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int value;
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};
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/* Generic assembler global variables which must be defined by all
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targets. */
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/* Characters which always start a comment. */
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const char comment_chars[] = "#";
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/* Characters which start a comment at the beginning of a line. */
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const char line_comment_chars[] = ";#";
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/* Characters which may be used to separate multiple commands on a
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single line. */
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const char line_separator_chars[] = ";";
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/* Characters which are used to indicate an exponent in a floating
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point number. */
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const char EXP_CHARS[] = "eE";
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/* Characters which mean that a number is a floating point constant,
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as in 0d1.0. */
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const char FLT_CHARS[] = "dD";
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const relax_typeS md_relax_table[] =
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{
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/* bCC relaxing */
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{0x81, -0x7e, 2, 1},
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{0x8004, -0x7ffb, 5, 2},
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{0x800006, -0x7ffff9, 7, 0},
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/* bCCx relaxing */
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{0x81, -0x7e, 3, 4},
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{0x8004, -0x7ffb, 6, 5},
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{0x800006, -0x7ffff9, 8, 0},
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/* jsr relaxing */
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{0x8004, -0x7ffb, 3, 7},
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{0x800006, -0x7ffff9, 5, 0},
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/* jmp relaxing */
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{0x81, -0x7e, 2, 9},
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{0x8004, -0x7ffb, 3, 10},
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{0x800006, -0x7ffff9, 5, 0},
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};
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/* Fixups. */
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#define MAX_INSN_FIXUPS 5
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struct mn10200_fixup
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{
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expressionS exp;
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int opindex;
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bfd_reloc_code_real_type reloc;
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};
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struct mn10200_fixup fixups[MAX_INSN_FIXUPS];
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static int fc;
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const char *md_shortopts = "";
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struct option md_longopts[] =
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{
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{NULL, no_argument, NULL, 0}
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};
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size_t md_longopts_size = sizeof (md_longopts);
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/* The target specific pseudo-ops which we support. */
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const pseudo_typeS md_pseudo_table[] =
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{
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{ NULL, NULL, 0 }
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};
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/* Opcode hash table. */
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static struct hash_control *mn10200_hash;
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/* This table is sorted. Suitable for searching by a binary search. */
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static const struct reg_name data_registers[] =
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{
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{ "d0", 0 },
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{ "d1", 1 },
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{ "d2", 2 },
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{ "d3", 3 },
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};
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#define DATA_REG_NAME_CNT \
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(sizeof (data_registers) / sizeof (struct reg_name))
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static const struct reg_name address_registers[] =
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{
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{ "a0", 0 },
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{ "a1", 1 },
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{ "a2", 2 },
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{ "a3", 3 },
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};
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#define ADDRESS_REG_NAME_CNT \
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(sizeof (address_registers) / sizeof (struct reg_name))
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static const struct reg_name other_registers[] =
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{
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{ "mdr", 0 },
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{ "psw", 0 },
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};
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#define OTHER_REG_NAME_CNT \
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(sizeof (other_registers) / sizeof (struct reg_name))
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/* reg_name_search does a binary search of the given register table
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to see if "name" is a valid regiter name. Returns the register
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number from the array on success, or -1 on failure. */
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static int
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reg_name_search (const struct reg_name *regs,
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int regcount,
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const char *name)
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{
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int middle, low, high;
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int cmp;
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low = 0;
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high = regcount - 1;
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do
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{
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middle = (low + high) / 2;
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cmp = strcasecmp (name, regs[middle].name);
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if (cmp < 0)
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high = middle - 1;
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else if (cmp > 0)
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low = middle + 1;
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else
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return regs[middle].value;
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}
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while (low <= high);
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return -1;
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}
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/* Summary of register_name().
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in: Input_line_pointer points to 1st char of operand.
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out: An expressionS.
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The operand may have been a register: in this case, X_op == O_register,
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X_add_number is set to the register number, and truth is returned.
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Input_line_pointer->(next non-blank) char after operand, or is in
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its original state. */
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static bfd_boolean
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data_register_name (expressionS *expressionP)
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{
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int reg_number;
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char *name;
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char *start;
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char c;
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/* Find the spelling of the operand. */
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start = name = input_line_pointer;
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c = get_symbol_end ();
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reg_number = reg_name_search (data_registers, DATA_REG_NAME_CNT, name);
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/* Put back the delimiting char. */
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*input_line_pointer = c;
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/* Look to see if it's in the register table. */
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if (reg_number >= 0)
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{
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expressionP->X_op = O_register;
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expressionP->X_add_number = reg_number;
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/* Make the rest nice. */
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expressionP->X_add_symbol = NULL;
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expressionP->X_op_symbol = NULL;
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return TRUE;
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}
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/* Reset the line as if we had not done anything. */
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input_line_pointer = start;
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return FALSE;
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}
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/* Summary of register_name().
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in: Input_line_pointer points to 1st char of operand.
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||
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out: An expressionS.
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The operand may have been a register: in this case, X_op == O_register,
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X_add_number is set to the register number, and truth is returned.
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Input_line_pointer->(next non-blank) char after operand, or is in
|
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its original state. */
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static bfd_boolean
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address_register_name (expressionS *expressionP)
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{
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||
int reg_number;
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char *name;
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char *start;
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char c;
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/* Find the spelling of the operand. */
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start = name = input_line_pointer;
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c = get_symbol_end ();
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reg_number = reg_name_search (address_registers, ADDRESS_REG_NAME_CNT, name);
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/* Put back the delimiting char. */
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*input_line_pointer = c;
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/* Look to see if it's in the register table. */
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if (reg_number >= 0)
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{
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expressionP->X_op = O_register;
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expressionP->X_add_number = reg_number;
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/* Make the rest nice. */
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expressionP->X_add_symbol = NULL;
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expressionP->X_op_symbol = NULL;
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return TRUE;
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}
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/* Reset the line as if we had not done anything. */
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input_line_pointer = start;
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return FALSE;
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}
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/* Summary of register_name().
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in: Input_line_pointer points to 1st char of operand.
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out: An expressionS.
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The operand may have been a register: in this case, X_op == O_register,
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X_add_number is set to the register number, and truth is returned.
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Input_line_pointer->(next non-blank) char after operand, or is in
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its original state. */
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static bfd_boolean
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other_register_name (expressionS *expressionP)
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{
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int reg_number;
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char *name;
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char *start;
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char c;
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/* Find the spelling of the operand. */
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start = name = input_line_pointer;
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c = get_symbol_end ();
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reg_number = reg_name_search (other_registers, OTHER_REG_NAME_CNT, name);
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/* Put back the delimiting char. */
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*input_line_pointer = c;
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/* Look to see if it's in the register table. */
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if (reg_number >= 0)
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{
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expressionP->X_op = O_register;
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expressionP->X_add_number = reg_number;
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/* Make the rest nice. */
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expressionP->X_add_symbol = NULL;
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expressionP->X_op_symbol = NULL;
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return TRUE;
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}
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/* Reset the line as if we had not done anything. */
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input_line_pointer = start;
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return FALSE;
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}
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void
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md_show_usage (FILE *stream)
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{
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fprintf (stream, _("MN10200 options:\n\
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none yet\n"));
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}
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int
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md_parse_option (int c ATTRIBUTE_UNUSED,
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char *arg ATTRIBUTE_UNUSED)
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{
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return 0;
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}
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symbolS *
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md_undefined_symbol (char *name ATTRIBUTE_UNUSED)
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{
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return 0;
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}
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char *
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md_atof (int type, char *litp, int *sizep)
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{
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return ieee_md_atof (type, litp, sizep, FALSE);
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}
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void
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md_convert_frag (bfd *abfd ATTRIBUTE_UNUSED,
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asection *sec,
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fragS *fragP)
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{
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static unsigned long label_count = 0;
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char buf[40];
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subseg_change (sec, 0);
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if (fragP->fr_subtype == 0)
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{
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fix_new (fragP, fragP->fr_fix + 1, 1, fragP->fr_symbol,
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fragP->fr_offset, 1, BFD_RELOC_8_PCREL);
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fragP->fr_var = 0;
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fragP->fr_fix += 2;
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}
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else if (fragP->fr_subtype == 1)
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{
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/* Reverse the condition of the first branch. */
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int offset = fragP->fr_fix;
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int opcode = fragP->fr_literal[offset] & 0xff;
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||
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switch (opcode)
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{
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||
case 0xe8:
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opcode = 0xe9;
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break;
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case 0xe9:
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opcode = 0xe8;
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break;
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case 0xe0:
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opcode = 0xe2;
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break;
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case 0xe2:
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opcode = 0xe0;
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break;
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case 0xe3:
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opcode = 0xe1;
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break;
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case 0xe1:
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opcode = 0xe3;
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break;
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||
case 0xe4:
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opcode = 0xe6;
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break;
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||
case 0xe6:
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opcode = 0xe4;
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break;
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||
case 0xe7:
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||
opcode = 0xe5;
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||
break;
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||
case 0xe5:
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||
opcode = 0xe7;
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||
break;
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||
default:
|
||
abort ();
|
||
}
|
||
fragP->fr_literal[offset] = opcode;
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||
|
||
/* Create a fixup for the reversed conditional branch. */
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||
sprintf (buf, ".%s_%ld", FAKE_LABEL_NAME, label_count++);
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fix_new (fragP, fragP->fr_fix + 1, 1,
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symbol_new (buf, sec, 0, fragP->fr_next),
|
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fragP->fr_offset, 1, BFD_RELOC_8_PCREL);
|
||
|
||
/* Now create the unconditional branch + fixup to the
|
||
final target. */
|
||
fragP->fr_literal[offset + 2] = 0xfc;
|
||
fix_new (fragP, fragP->fr_fix + 3, 2, fragP->fr_symbol,
|
||
fragP->fr_offset, 1, BFD_RELOC_16_PCREL);
|
||
fragP->fr_var = 0;
|
||
fragP->fr_fix += 5;
|
||
}
|
||
else if (fragP->fr_subtype == 2)
|
||
{
|
||
/* Reverse the condition of the first branch. */
|
||
int offset = fragP->fr_fix;
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||
int opcode = fragP->fr_literal[offset] & 0xff;
|
||
|
||
switch (opcode)
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||
{
|
||
case 0xe8:
|
||
opcode = 0xe9;
|
||
break;
|
||
case 0xe9:
|
||
opcode = 0xe8;
|
||
break;
|
||
case 0xe0:
|
||
opcode = 0xe2;
|
||
break;
|
||
case 0xe2:
|
||
opcode = 0xe0;
|
||
break;
|
||
case 0xe3:
|
||
opcode = 0xe1;
|
||
break;
|
||
case 0xe1:
|
||
opcode = 0xe3;
|
||
break;
|
||
case 0xe4:
|
||
opcode = 0xe6;
|
||
break;
|
||
case 0xe6:
|
||
opcode = 0xe4;
|
||
break;
|
||
case 0xe7:
|
||
opcode = 0xe5;
|
||
break;
|
||
case 0xe5:
|
||
opcode = 0xe7;
|
||
break;
|
||
default:
|
||
abort ();
|
||
}
|
||
fragP->fr_literal[offset] = opcode;
|
||
|
||
/* Create a fixup for the reversed conditional branch. */
|
||
sprintf (buf, ".%s_%ld", FAKE_LABEL_NAME, label_count++);
|
||
fix_new (fragP, fragP->fr_fix + 1, 1,
|
||
symbol_new (buf, sec, 0, fragP->fr_next),
|
||
fragP->fr_offset, 1, BFD_RELOC_8_PCREL);
|
||
|
||
/* Now create the unconditional branch + fixup to the
|
||
final target. */
|
||
fragP->fr_literal[offset + 2] = 0xf4;
|
||
fragP->fr_literal[offset + 3] = 0xe0;
|
||
fix_new (fragP, fragP->fr_fix + 4, 4, fragP->fr_symbol,
|
||
fragP->fr_offset, 1, BFD_RELOC_24_PCREL);
|
||
fragP->fr_var = 0;
|
||
fragP->fr_fix += 7;
|
||
}
|
||
else if (fragP->fr_subtype == 3)
|
||
{
|
||
fix_new (fragP, fragP->fr_fix + 2, 1, fragP->fr_symbol,
|
||
fragP->fr_offset, 1, BFD_RELOC_8_PCREL);
|
||
fragP->fr_var = 0;
|
||
fragP->fr_fix += 3;
|
||
}
|
||
else if (fragP->fr_subtype == 4)
|
||
{
|
||
/* Reverse the condition of the first branch. */
|
||
int offset = fragP->fr_fix;
|
||
int opcode = fragP->fr_literal[offset + 1] & 0xff;
|
||
|
||
switch (opcode)
|
||
{
|
||
case 0xfc:
|
||
opcode = 0xfd;
|
||
break;
|
||
case 0xfd:
|
||
opcode = 0xfc;
|
||
break;
|
||
case 0xfe:
|
||
opcode = 0xff;
|
||
break;
|
||
case 0xff:
|
||
opcode = 0xfe;
|
||
break;
|
||
case 0xe8:
|
||
opcode = 0xe9;
|
||
break;
|
||
case 0xe9:
|
||
opcode = 0xe8;
|
||
break;
|
||
case 0xe0:
|
||
opcode = 0xe2;
|
||
break;
|
||
case 0xe2:
|
||
opcode = 0xe0;
|
||
break;
|
||
case 0xe3:
|
||
opcode = 0xe1;
|
||
break;
|
||
case 0xe1:
|
||
opcode = 0xe3;
|
||
break;
|
||
case 0xe4:
|
||
opcode = 0xe6;
|
||
break;
|
||
case 0xe6:
|
||
opcode = 0xe4;
|
||
break;
|
||
case 0xe7:
|
||
opcode = 0xe5;
|
||
break;
|
||
case 0xe5:
|
||
opcode = 0xe7;
|
||
break;
|
||
case 0xec:
|
||
opcode = 0xed;
|
||
break;
|
||
case 0xed:
|
||
opcode = 0xec;
|
||
break;
|
||
case 0xee:
|
||
opcode = 0xef;
|
||
break;
|
||
case 0xef:
|
||
opcode = 0xee;
|
||
break;
|
||
default:
|
||
abort ();
|
||
}
|
||
fragP->fr_literal[offset + 1] = opcode;
|
||
|
||
/* Create a fixup for the reversed conditional branch. */
|
||
sprintf (buf, ".%s_%ld", FAKE_LABEL_NAME, label_count++);
|
||
fix_new (fragP, fragP->fr_fix + 2, 1,
|
||
symbol_new (buf, sec, 0, fragP->fr_next),
|
||
fragP->fr_offset, 1, BFD_RELOC_8_PCREL);
|
||
|
||
/* Now create the unconditional branch + fixup to the
|
||
final target. */
|
||
fragP->fr_literal[offset + 3] = 0xfc;
|
||
fix_new (fragP, fragP->fr_fix + 4, 2, fragP->fr_symbol,
|
||
fragP->fr_offset, 1, BFD_RELOC_16_PCREL);
|
||
fragP->fr_var = 0;
|
||
fragP->fr_fix += 6;
|
||
}
|
||
else if (fragP->fr_subtype == 5)
|
||
{
|
||
/* Reverse the condition of the first branch. */
|
||
int offset = fragP->fr_fix;
|
||
int opcode = fragP->fr_literal[offset + 1] & 0xff;
|
||
|
||
switch (opcode)
|
||
{
|
||
case 0xfc:
|
||
opcode = 0xfd;
|
||
break;
|
||
case 0xfd:
|
||
opcode = 0xfc;
|
||
break;
|
||
case 0xfe:
|
||
opcode = 0xff;
|
||
break;
|
||
case 0xff:
|
||
opcode = 0xfe;
|
||
break;
|
||
case 0xe8:
|
||
opcode = 0xe9;
|
||
break;
|
||
case 0xe9:
|
||
opcode = 0xe8;
|
||
break;
|
||
case 0xe0:
|
||
opcode = 0xe2;
|
||
break;
|
||
case 0xe2:
|
||
opcode = 0xe0;
|
||
break;
|
||
case 0xe3:
|
||
opcode = 0xe1;
|
||
break;
|
||
case 0xe1:
|
||
opcode = 0xe3;
|
||
break;
|
||
case 0xe4:
|
||
opcode = 0xe6;
|
||
break;
|
||
case 0xe6:
|
||
opcode = 0xe4;
|
||
break;
|
||
case 0xe7:
|
||
opcode = 0xe5;
|
||
break;
|
||
case 0xe5:
|
||
opcode = 0xe7;
|
||
break;
|
||
case 0xec:
|
||
opcode = 0xed;
|
||
break;
|
||
case 0xed:
|
||
opcode = 0xec;
|
||
break;
|
||
case 0xee:
|
||
opcode = 0xef;
|
||
break;
|
||
case 0xef:
|
||
opcode = 0xee;
|
||
break;
|
||
default:
|
||
abort ();
|
||
}
|
||
fragP->fr_literal[offset + 1] = opcode;
|
||
|
||
/* Create a fixup for the reversed conditional branch. */
|
||
sprintf (buf, ".%s_%ld", FAKE_LABEL_NAME, label_count++);
|
||
fix_new (fragP, fragP->fr_fix + 2, 1,
|
||
symbol_new (buf, sec, 0, fragP->fr_next),
|
||
fragP->fr_offset, 1, BFD_RELOC_8_PCREL);
|
||
|
||
/* Now create the unconditional branch + fixup to the
|
||
final target. */
|
||
fragP->fr_literal[offset + 3] = 0xf4;
|
||
fragP->fr_literal[offset + 4] = 0xe0;
|
||
fix_new (fragP, fragP->fr_fix + 5, 4, fragP->fr_symbol,
|
||
fragP->fr_offset, 1, BFD_RELOC_24_PCREL);
|
||
fragP->fr_var = 0;
|
||
fragP->fr_fix += 8;
|
||
}
|
||
else if (fragP->fr_subtype == 6)
|
||
{
|
||
fix_new (fragP, fragP->fr_fix + 1, 2, fragP->fr_symbol,
|
||
fragP->fr_offset, 1, BFD_RELOC_16_PCREL);
|
||
fragP->fr_var = 0;
|
||
fragP->fr_fix += 3;
|
||
}
|
||
else if (fragP->fr_subtype == 7)
|
||
{
|
||
int offset = fragP->fr_fix;
|
||
fragP->fr_literal[offset] = 0xf4;
|
||
fragP->fr_literal[offset + 1] = 0xe1;
|
||
|
||
fix_new (fragP, fragP->fr_fix + 2, 4, fragP->fr_symbol,
|
||
fragP->fr_offset, 1, BFD_RELOC_24_PCREL);
|
||
fragP->fr_var = 0;
|
||
fragP->fr_fix += 5;
|
||
}
|
||
else if (fragP->fr_subtype == 8)
|
||
{
|
||
fragP->fr_literal[fragP->fr_fix] = 0xea;
|
||
fix_new (fragP, fragP->fr_fix + 1, 1, fragP->fr_symbol,
|
||
fragP->fr_offset, 1, BFD_RELOC_8_PCREL);
|
||
fragP->fr_var = 0;
|
||
fragP->fr_fix += 2;
|
||
}
|
||
else if (fragP->fr_subtype == 9)
|
||
{
|
||
int offset = fragP->fr_fix;
|
||
fragP->fr_literal[offset] = 0xfc;
|
||
|
||
fix_new (fragP, fragP->fr_fix + 1, 4, fragP->fr_symbol,
|
||
fragP->fr_offset, 1, BFD_RELOC_16_PCREL);
|
||
fragP->fr_var = 0;
|
||
fragP->fr_fix += 3;
|
||
}
|
||
else if (fragP->fr_subtype == 10)
|
||
{
|
||
int offset = fragP->fr_fix;
|
||
fragP->fr_literal[offset] = 0xf4;
|
||
fragP->fr_literal[offset + 1] = 0xe0;
|
||
|
||
fix_new (fragP, fragP->fr_fix + 2, 4, fragP->fr_symbol,
|
||
fragP->fr_offset, 1, BFD_RELOC_24_PCREL);
|
||
fragP->fr_var = 0;
|
||
fragP->fr_fix += 5;
|
||
}
|
||
else
|
||
abort ();
|
||
}
|
||
|
||
valueT
|
||
md_section_align (asection *seg, valueT addr)
|
||
{
|
||
int align = bfd_get_section_alignment (stdoutput, seg);
|
||
return ((addr + (1 << align) - 1) & (-1 << align));
|
||
}
|
||
|
||
void
|
||
md_begin (void)
|
||
{
|
||
char *prev_name = "";
|
||
register const struct mn10200_opcode *op;
|
||
|
||
mn10200_hash = hash_new ();
|
||
|
||
/* Insert unique names into hash table. The MN10200 instruction set
|
||
has many identical opcode names that have different opcodes based
|
||
on the operands. This hash table then provides a quick index to
|
||
the first opcode with a particular name in the opcode table. */
|
||
|
||
op = mn10200_opcodes;
|
||
while (op->name)
|
||
{
|
||
if (strcmp (prev_name, op->name))
|
||
{
|
||
prev_name = (char *) op->name;
|
||
hash_insert (mn10200_hash, op->name, (char *) op);
|
||
}
|
||
op++;
|
||
}
|
||
|
||
/* This is both a simplification (we don't have to write md_apply_fix)
|
||
and support for future optimizations (branch shortening and similar
|
||
stuff in the linker. */
|
||
linkrelax = 1;
|
||
}
|
||
|
||
static unsigned long
|
||
check_operand (unsigned long insn ATTRIBUTE_UNUSED,
|
||
const struct mn10200_operand *operand,
|
||
offsetT val)
|
||
{
|
||
/* No need to check 24bit or 32bit operands for a bit. */
|
||
if (operand->bits < 24
|
||
&& (operand->flags & MN10200_OPERAND_NOCHECK) == 0)
|
||
{
|
||
long min, max;
|
||
offsetT test;
|
||
|
||
if ((operand->flags & MN10200_OPERAND_SIGNED) != 0)
|
||
{
|
||
max = (1 << (operand->bits - 1)) - 1;
|
||
min = - (1 << (operand->bits - 1));
|
||
}
|
||
else
|
||
{
|
||
max = (1 << operand->bits) - 1;
|
||
min = 0;
|
||
}
|
||
|
||
test = val;
|
||
|
||
if (test < (offsetT) min || test > (offsetT) max)
|
||
return 0;
|
||
else
|
||
return 1;
|
||
}
|
||
return 1;
|
||
}
|
||
/* If while processing a fixup, a reloc really needs to be created
|
||
Then it is done here. */
|
||
|
||
arelent *
|
||
tc_gen_reloc (asection *seg ATTRIBUTE_UNUSED, fixS *fixp)
|
||
{
|
||
arelent *reloc;
|
||
reloc = xmalloc (sizeof (arelent));
|
||
|
||
if (fixp->fx_subsy != NULL)
|
||
{
|
||
if (S_GET_SEGMENT (fixp->fx_addsy) == S_GET_SEGMENT (fixp->fx_subsy)
|
||
&& S_IS_DEFINED (fixp->fx_subsy))
|
||
{
|
||
fixp->fx_offset -= S_GET_VALUE (fixp->fx_subsy);
|
||
fixp->fx_subsy = NULL;
|
||
}
|
||
else
|
||
/* FIXME: We should try more ways to resolve difference expressions
|
||
here. At least this is better than silently ignoring the
|
||
subtrahend. */
|
||
as_bad_where (fixp->fx_file, fixp->fx_line,
|
||
_("can't resolve `%s' {%s section} - `%s' {%s section}"),
|
||
fixp->fx_addsy ? S_GET_NAME (fixp->fx_addsy) : "0",
|
||
segment_name (fixp->fx_addsy
|
||
? S_GET_SEGMENT (fixp->fx_addsy)
|
||
: absolute_section),
|
||
S_GET_NAME (fixp->fx_subsy),
|
||
segment_name (S_GET_SEGMENT (fixp->fx_addsy)));
|
||
}
|
||
|
||
reloc->howto = bfd_reloc_type_lookup (stdoutput, fixp->fx_r_type);
|
||
if (reloc->howto == NULL)
|
||
{
|
||
as_bad_where (fixp->fx_file, fixp->fx_line,
|
||
_("reloc %d not supported by object file format"),
|
||
(int) fixp->fx_r_type);
|
||
return NULL;
|
||
}
|
||
reloc->address = fixp->fx_frag->fr_address + fixp->fx_where;
|
||
reloc->sym_ptr_ptr = xmalloc (sizeof (asymbol *));
|
||
*reloc->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_addsy);
|
||
reloc->addend = fixp->fx_offset;
|
||
return reloc;
|
||
}
|
||
|
||
int
|
||
md_estimate_size_before_relax (fragS *fragp, asection *seg)
|
||
{
|
||
if (fragp->fr_subtype == 6
|
||
&& (!S_IS_DEFINED (fragp->fr_symbol)
|
||
|| seg != S_GET_SEGMENT (fragp->fr_symbol)))
|
||
fragp->fr_subtype = 7;
|
||
else if (fragp->fr_subtype == 8
|
||
&& (!S_IS_DEFINED (fragp->fr_symbol)
|
||
|| seg != S_GET_SEGMENT (fragp->fr_symbol)))
|
||
fragp->fr_subtype = 10;
|
||
|
||
if (fragp->fr_subtype >= sizeof (md_relax_table) / sizeof (md_relax_table[0]))
|
||
abort ();
|
||
|
||
return md_relax_table[fragp->fr_subtype].rlx_length;
|
||
}
|
||
|
||
long
|
||
md_pcrel_from (fixS *fixp)
|
||
{
|
||
return fixp->fx_frag->fr_address;
|
||
}
|
||
|
||
void
|
||
md_apply_fix (fixS * fixP, valueT * valP ATTRIBUTE_UNUSED, segT seg ATTRIBUTE_UNUSED)
|
||
{
|
||
/* We shouldn't ever get here because linkrelax is nonzero. */
|
||
abort ();
|
||
fixP->fx_done = 1;
|
||
}
|
||
|
||
/* Insert an operand value into an instruction. */
|
||
|
||
static void
|
||
mn10200_insert_operand (unsigned long *insnp,
|
||
unsigned long *extensionp,
|
||
const struct mn10200_operand *operand,
|
||
offsetT val,
|
||
char *file,
|
||
unsigned int line,
|
||
unsigned int shift)
|
||
{
|
||
/* No need to check 24 or 32bit operands for a bit. */
|
||
if (operand->bits < 24
|
||
&& (operand->flags & MN10200_OPERAND_NOCHECK) == 0)
|
||
{
|
||
long min, max;
|
||
offsetT test;
|
||
|
||
if ((operand->flags & MN10200_OPERAND_SIGNED) != 0)
|
||
{
|
||
max = (1 << (operand->bits - 1)) - 1;
|
||
min = - (1 << (operand->bits - 1));
|
||
}
|
||
else
|
||
{
|
||
max = (1 << operand->bits) - 1;
|
||
min = 0;
|
||
}
|
||
|
||
test = val;
|
||
|
||
if (test < (offsetT) min || test > (offsetT) max)
|
||
as_warn_value_out_of_range (_("operand"), test, (offsetT) min, (offsetT) max, file, line);
|
||
}
|
||
|
||
if ((operand->flags & MN10200_OPERAND_EXTENDED) == 0)
|
||
{
|
||
*insnp |= (((long) val & ((1 << operand->bits) - 1))
|
||
<< (operand->shift + shift));
|
||
|
||
if ((operand->flags & MN10200_OPERAND_REPEATED) != 0)
|
||
*insnp |= (((long) val & ((1 << operand->bits) - 1))
|
||
<< (operand->shift + shift + 2));
|
||
}
|
||
else
|
||
{
|
||
*extensionp |= (val >> 16) & 0xff;
|
||
*insnp |= val & 0xffff;
|
||
}
|
||
}
|
||
|
||
void
|
||
md_assemble (char *str)
|
||
{
|
||
char *s;
|
||
struct mn10200_opcode *opcode;
|
||
struct mn10200_opcode *next_opcode;
|
||
const unsigned char *opindex_ptr;
|
||
int next_opindex, relaxable;
|
||
unsigned long insn, extension, size = 0;
|
||
char *f;
|
||
int i;
|
||
int match;
|
||
|
||
/* Get the opcode. */
|
||
for (s = str; *s != '\0' && !ISSPACE (*s); s++)
|
||
;
|
||
if (*s != '\0')
|
||
*s++ = '\0';
|
||
|
||
/* Find the first opcode with the proper name. */
|
||
opcode = (struct mn10200_opcode *) hash_find (mn10200_hash, str);
|
||
if (opcode == NULL)
|
||
{
|
||
as_bad (_("Unrecognized opcode: `%s'"), str);
|
||
return;
|
||
}
|
||
|
||
str = s;
|
||
while (ISSPACE (*str))
|
||
++str;
|
||
|
||
input_line_pointer = str;
|
||
|
||
for (;;)
|
||
{
|
||
const char *errmsg = NULL;
|
||
int op_idx;
|
||
char *hold;
|
||
int extra_shift = 0;
|
||
|
||
relaxable = 0;
|
||
fc = 0;
|
||
match = 0;
|
||
next_opindex = 0;
|
||
insn = opcode->opcode;
|
||
extension = 0;
|
||
for (op_idx = 1, opindex_ptr = opcode->operands;
|
||
*opindex_ptr != 0;
|
||
opindex_ptr++, op_idx++)
|
||
{
|
||
const struct mn10200_operand *operand;
|
||
expressionS ex;
|
||
|
||
if (next_opindex == 0)
|
||
{
|
||
operand = &mn10200_operands[*opindex_ptr];
|
||
}
|
||
else
|
||
{
|
||
operand = &mn10200_operands[next_opindex];
|
||
next_opindex = 0;
|
||
}
|
||
|
||
errmsg = NULL;
|
||
|
||
while (*str == ' ' || *str == ',')
|
||
++str;
|
||
|
||
if (operand->flags & MN10200_OPERAND_RELAX)
|
||
relaxable = 1;
|
||
|
||
/* Gather the operand. */
|
||
hold = input_line_pointer;
|
||
input_line_pointer = str;
|
||
|
||
if (operand->flags & MN10200_OPERAND_PAREN)
|
||
{
|
||
if (*input_line_pointer != ')' && *input_line_pointer != '(')
|
||
{
|
||
input_line_pointer = hold;
|
||
str = hold;
|
||
goto error;
|
||
}
|
||
input_line_pointer++;
|
||
goto keep_going;
|
||
}
|
||
/* See if we can match the operands. */
|
||
else if (operand->flags & MN10200_OPERAND_DREG)
|
||
{
|
||
if (!data_register_name (&ex))
|
||
{
|
||
input_line_pointer = hold;
|
||
str = hold;
|
||
goto error;
|
||
}
|
||
}
|
||
else if (operand->flags & MN10200_OPERAND_AREG)
|
||
{
|
||
if (!address_register_name (&ex))
|
||
{
|
||
input_line_pointer = hold;
|
||
str = hold;
|
||
goto error;
|
||
}
|
||
}
|
||
else if (operand->flags & MN10200_OPERAND_PSW)
|
||
{
|
||
char *start = input_line_pointer;
|
||
char c = get_symbol_end ();
|
||
|
||
if (strcmp (start, "psw") != 0)
|
||
{
|
||
*input_line_pointer = c;
|
||
input_line_pointer = hold;
|
||
str = hold;
|
||
goto error;
|
||
}
|
||
*input_line_pointer = c;
|
||
goto keep_going;
|
||
}
|
||
else if (operand->flags & MN10200_OPERAND_MDR)
|
||
{
|
||
char *start = input_line_pointer;
|
||
char c = get_symbol_end ();
|
||
|
||
if (strcmp (start, "mdr") != 0)
|
||
{
|
||
*input_line_pointer = c;
|
||
input_line_pointer = hold;
|
||
str = hold;
|
||
goto error;
|
||
}
|
||
*input_line_pointer = c;
|
||
goto keep_going;
|
||
}
|
||
else if (data_register_name (&ex))
|
||
{
|
||
input_line_pointer = hold;
|
||
str = hold;
|
||
goto error;
|
||
}
|
||
else if (address_register_name (&ex))
|
||
{
|
||
input_line_pointer = hold;
|
||
str = hold;
|
||
goto error;
|
||
}
|
||
else if (other_register_name (&ex))
|
||
{
|
||
input_line_pointer = hold;
|
||
str = hold;
|
||
goto error;
|
||
}
|
||
else if (*str == ')' || *str == '(')
|
||
{
|
||
input_line_pointer = hold;
|
||
str = hold;
|
||
goto error;
|
||
}
|
||
else
|
||
{
|
||
expression (&ex);
|
||
}
|
||
|
||
switch (ex.X_op)
|
||
{
|
||
case O_illegal:
|
||
errmsg = _("illegal operand");
|
||
goto error;
|
||
case O_absent:
|
||
errmsg = _("missing operand");
|
||
goto error;
|
||
case O_register:
|
||
if ((operand->flags
|
||
& (MN10200_OPERAND_DREG | MN10200_OPERAND_AREG)) == 0)
|
||
{
|
||
input_line_pointer = hold;
|
||
str = hold;
|
||
goto error;
|
||
}
|
||
|
||
if (opcode->format == FMT_2 || opcode->format == FMT_5)
|
||
extra_shift = 8;
|
||
else if (opcode->format == FMT_3 || opcode->format == FMT_6
|
||
|| opcode->format == FMT_7)
|
||
extra_shift = 16;
|
||
else
|
||
extra_shift = 0;
|
||
|
||
mn10200_insert_operand (&insn, &extension, operand,
|
||
ex.X_add_number, NULL,
|
||
0, extra_shift);
|
||
|
||
break;
|
||
|
||
case O_constant:
|
||
/* If this operand can be promoted, and it doesn't
|
||
fit into the allocated bitfield for this insn,
|
||
then promote it (ie this opcode does not match). */
|
||
if (operand->flags
|
||
& (MN10200_OPERAND_PROMOTE | MN10200_OPERAND_RELAX)
|
||
&& !check_operand (insn, operand, ex.X_add_number))
|
||
{
|
||
input_line_pointer = hold;
|
||
str = hold;
|
||
goto error;
|
||
}
|
||
|
||
mn10200_insert_operand (&insn, &extension, operand,
|
||
ex.X_add_number, NULL,
|
||
0, 0);
|
||
break;
|
||
|
||
default:
|
||
/* If this operand can be promoted, then this opcode didn't
|
||
match since we can't know if it needed promotion! */
|
||
if (operand->flags & MN10200_OPERAND_PROMOTE)
|
||
{
|
||
input_line_pointer = hold;
|
||
str = hold;
|
||
goto error;
|
||
}
|
||
|
||
/* We need to generate a fixup for this expression. */
|
||
if (fc >= MAX_INSN_FIXUPS)
|
||
as_fatal (_("too many fixups"));
|
||
fixups[fc].exp = ex;
|
||
fixups[fc].opindex = *opindex_ptr;
|
||
fixups[fc].reloc = BFD_RELOC_UNUSED;
|
||
++fc;
|
||
break;
|
||
}
|
||
|
||
keep_going:
|
||
str = input_line_pointer;
|
||
input_line_pointer = hold;
|
||
|
||
while (*str == ' ' || *str == ',')
|
||
++str;
|
||
|
||
}
|
||
|
||
/* Make sure we used all the operands! */
|
||
if (*str != ',')
|
||
match = 1;
|
||
|
||
error:
|
||
if (match == 0)
|
||
{
|
||
next_opcode = opcode + 1;
|
||
if (!strcmp (next_opcode->name, opcode->name))
|
||
{
|
||
opcode = next_opcode;
|
||
continue;
|
||
}
|
||
|
||
as_bad ("%s", errmsg);
|
||
return;
|
||
}
|
||
break;
|
||
}
|
||
|
||
while (ISSPACE (*str))
|
||
++str;
|
||
|
||
if (*str != '\0')
|
||
as_bad (_("junk at end of line: `%s'"), str);
|
||
|
||
input_line_pointer = str;
|
||
|
||
if (opcode->format == FMT_1)
|
||
size = 1;
|
||
else if (opcode->format == FMT_2 || opcode->format == FMT_4)
|
||
size = 2;
|
||
else if (opcode->format == FMT_3 || opcode->format == FMT_5)
|
||
size = 3;
|
||
else if (opcode->format == FMT_6)
|
||
size = 4;
|
||
else if (opcode->format == FMT_7)
|
||
size = 5;
|
||
else
|
||
abort ();
|
||
|
||
/* Write out the instruction. */
|
||
dwarf2_emit_insn (0);
|
||
if (relaxable && fc > 0)
|
||
{
|
||
/* On a 64-bit host the size of an 'int' is not the same
|
||
as the size of a pointer, so we need a union to convert
|
||
the opindex field of the fr_cgen structure into a char *
|
||
so that it can be stored in the frag. We do not have
|
||
to worry about loosing accuracy as we are not going to
|
||
be even close to the 32bit limit of the int. */
|
||
union
|
||
{
|
||
int opindex;
|
||
char * ptr;
|
||
}
|
||
opindex_converter;
|
||
int type;
|
||
|
||
/* bCC */
|
||
if (size == 2 && opcode->opcode != 0xfc0000)
|
||
{
|
||
/* Handle bra specially. Basically treat it like jmp so
|
||
that we automatically handle 8, 16 and 32 bit offsets
|
||
correctly as well as jumps to an undefined address.
|
||
|
||
It is also important to not treat it like other bCC
|
||
instructions since the long forms of bra is different
|
||
from other bCC instructions. */
|
||
if (opcode->opcode == 0xea00)
|
||
type = 8;
|
||
else
|
||
type = 0;
|
||
}
|
||
/* jsr */
|
||
else if (size == 3 && opcode->opcode == 0xfd0000)
|
||
type = 6;
|
||
/* jmp */
|
||
else if (size == 3 && opcode->opcode == 0xfc0000)
|
||
type = 8;
|
||
/* bCCx */
|
||
else
|
||
type = 3;
|
||
|
||
opindex_converter.opindex = fixups[0].opindex;
|
||
f = frag_var (rs_machine_dependent, 8, 8 - size, type,
|
||
fixups[0].exp.X_add_symbol,
|
||
fixups[0].exp.X_add_number,
|
||
opindex_converter.ptr);
|
||
number_to_chars_bigendian (f, insn, size);
|
||
if (8 - size > 4)
|
||
{
|
||
number_to_chars_bigendian (f + size, 0, 4);
|
||
number_to_chars_bigendian (f + size + 4, 0, 8 - size - 4);
|
||
}
|
||
else
|
||
number_to_chars_bigendian (f + size, 0, 8 - size);
|
||
}
|
||
else
|
||
{
|
||
f = frag_more (size);
|
||
|
||
/* Oh, what a mess. The instruction is in big endian format, but
|
||
16 and 24bit immediates are little endian! */
|
||
if (opcode->format == FMT_3)
|
||
{
|
||
number_to_chars_bigendian (f, (insn >> 16) & 0xff, 1);
|
||
number_to_chars_littleendian (f + 1, insn & 0xffff, 2);
|
||
}
|
||
else if (opcode->format == FMT_6)
|
||
{
|
||
number_to_chars_bigendian (f, (insn >> 16) & 0xffff, 2);
|
||
number_to_chars_littleendian (f + 2, insn & 0xffff, 2);
|
||
}
|
||
else if (opcode->format == FMT_7)
|
||
{
|
||
number_to_chars_bigendian (f, (insn >> 16) & 0xffff, 2);
|
||
number_to_chars_littleendian (f + 2, insn & 0xffff, 2);
|
||
number_to_chars_littleendian (f + 4, extension & 0xff, 1);
|
||
}
|
||
else
|
||
number_to_chars_bigendian (f, insn, size > 4 ? 4 : size);
|
||
|
||
/* Create any fixups. */
|
||
for (i = 0; i < fc; i++)
|
||
{
|
||
const struct mn10200_operand *operand;
|
||
int reloc_size;
|
||
|
||
operand = &mn10200_operands[fixups[i].opindex];
|
||
if (fixups[i].reloc != BFD_RELOC_UNUSED)
|
||
{
|
||
reloc_howto_type *reloc_howto;
|
||
int offset;
|
||
fixS *fixP;
|
||
|
||
reloc_howto = bfd_reloc_type_lookup (stdoutput,
|
||
fixups[i].reloc);
|
||
|
||
if (!reloc_howto)
|
||
abort ();
|
||
|
||
reloc_size = bfd_get_reloc_size (reloc_howto);
|
||
|
||
if (reloc_size < 1 || reloc_size > 4)
|
||
abort ();
|
||
|
||
offset = 4 - reloc_size;
|
||
fixP = fix_new_exp (frag_now, f - frag_now->fr_literal + offset,
|
||
reloc_size,
|
||
&fixups[i].exp,
|
||
reloc_howto->pc_relative,
|
||
fixups[i].reloc);
|
||
|
||
/* PC-relative offsets are from the first byte of the
|
||
next instruction, not from the start of the current
|
||
instruction. */
|
||
if (reloc_howto->pc_relative)
|
||
fixP->fx_offset += reloc_size;
|
||
}
|
||
else
|
||
{
|
||
int reloc, pcrel, offset;
|
||
fixS *fixP;
|
||
|
||
reloc = BFD_RELOC_NONE;
|
||
/* How big is the reloc? Remember SPLIT relocs are
|
||
implicitly 32bits. */
|
||
reloc_size = operand->bits;
|
||
|
||
offset = size - reloc_size / 8;
|
||
|
||
/* Is the reloc pc-relative? */
|
||
pcrel = (operand->flags & MN10200_OPERAND_PCREL) != 0;
|
||
|
||
/* Choose a proper BFD relocation type. */
|
||
if (pcrel)
|
||
{
|
||
if (reloc_size == 8)
|
||
reloc = BFD_RELOC_8_PCREL;
|
||
else if (reloc_size == 24)
|
||
reloc = BFD_RELOC_24_PCREL;
|
||
else
|
||
abort ();
|
||
}
|
||
else
|
||
{
|
||
if (reloc_size == 32)
|
||
reloc = BFD_RELOC_32;
|
||
else if (reloc_size == 16)
|
||
reloc = BFD_RELOC_16;
|
||
else if (reloc_size == 8)
|
||
reloc = BFD_RELOC_8;
|
||
else if (reloc_size == 24)
|
||
reloc = BFD_RELOC_24;
|
||
else
|
||
abort ();
|
||
}
|
||
|
||
/* Convert the size of the reloc into what fix_new_exp
|
||
wants. */
|
||
reloc_size = reloc_size / 8;
|
||
if (reloc_size == 8)
|
||
reloc_size = 0;
|
||
else if (reloc_size == 16)
|
||
reloc_size = 1;
|
||
else if (reloc_size == 32 || reloc_size == 24)
|
||
reloc_size = 2;
|
||
|
||
fixP = fix_new_exp (frag_now, f - frag_now->fr_literal + offset,
|
||
reloc_size, &fixups[i].exp, pcrel,
|
||
((bfd_reloc_code_real_type) reloc));
|
||
|
||
/* PC-relative offsets are from the first byte of the
|
||
next instruction, not from the start of the current
|
||
instruction. */
|
||
if (pcrel)
|
||
fixP->fx_offset += size;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|