1903 lines
46 KiB
C
1903 lines
46 KiB
C
/* tc-v850.c -- Assembler code for the NEC V850
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Copyright (C) 1996, 1997, 1998 Free Software Foundation.
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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 2, 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, 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include <stdio.h>
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#include <ctype.h>
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#include "as.h"
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#include "subsegs.h"
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#include "opcode/v850.h"
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#define AREA_ZDA 0
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#define AREA_SDA 1
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#define AREA_TDA 2
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/* sign-extend a 16-bit number */
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#define SEXT16(x) ((((x) & 0xffff) ^ (~ 0x7fff)) + 0x8000)
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/* Temporarily holds the reloc in a cons expression. */
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static bfd_reloc_code_real_type hold_cons_reloc;
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/* Set to TRUE if we want to be pedantic about signed overflows. */
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static boolean warn_signed_overflows = FALSE;
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static boolean warn_unsigned_overflows = FALSE;
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/* Indicates the target BFD machine number. */
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static int machine = -1;
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/* Indicates the target processor(s) for the assemble. */
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static unsigned int processor_mask = -1;
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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 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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/* Conditional branches. */
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{0xff, -0x100, 2, 1},
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{0x1fffff, -0x200000, 6, 0},
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/* Unconditional branches. */
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{0xff, -0x100, 2, 3},
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{0x1fffff, -0x200000, 4, 0},
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};
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static segT sdata_section = NULL;
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static segT tdata_section = NULL;
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static segT zdata_section = NULL;
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static segT sbss_section = NULL;
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static segT tbss_section = NULL;
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static segT zbss_section = NULL;
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static segT rosdata_section = NULL;
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static segT rozdata_section = NULL;
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static segT scommon_section = NULL;
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static segT tcommon_section = NULL;
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static segT zcommon_section = NULL;
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/* fixups */
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#define MAX_INSN_FIXUPS (5)
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struct v850_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 v850_fixup fixups [MAX_INSN_FIXUPS];
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static int fc;
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void
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v850_sdata (int ignore)
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{
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obj_elf_section_change_hook();
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subseg_set (sdata_section, (subsegT) get_absolute_expression ());
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demand_empty_rest_of_line ();
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}
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void
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v850_tdata (int ignore)
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{
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obj_elf_section_change_hook();
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subseg_set (tdata_section, (subsegT) get_absolute_expression ());
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demand_empty_rest_of_line ();
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}
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void
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v850_zdata (int ignore)
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{
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obj_elf_section_change_hook();
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subseg_set (zdata_section, (subsegT) get_absolute_expression ());
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demand_empty_rest_of_line ();
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}
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void
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v850_sbss (int ignore)
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{
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obj_elf_section_change_hook();
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subseg_set (sbss_section, (subsegT) get_absolute_expression ());
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demand_empty_rest_of_line ();
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}
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void
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v850_tbss (int ignore)
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{
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obj_elf_section_change_hook();
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subseg_set (tbss_section, (subsegT) get_absolute_expression ());
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demand_empty_rest_of_line ();
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}
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void
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v850_zbss (int ignore)
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{
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obj_elf_section_change_hook();
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subseg_set (zbss_section, (subsegT) get_absolute_expression ());
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demand_empty_rest_of_line ();
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}
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void
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v850_rosdata (int ignore)
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{
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obj_elf_section_change_hook();
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subseg_set (rosdata_section, (subsegT) get_absolute_expression ());
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demand_empty_rest_of_line ();
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}
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void
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v850_rozdata (int ignore)
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{
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obj_elf_section_change_hook();
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subseg_set (rozdata_section, (subsegT) get_absolute_expression ());
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demand_empty_rest_of_line ();
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}
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void
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v850_bss (int ignore)
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{
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register int temp = get_absolute_expression ();
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obj_elf_section_change_hook();
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subseg_set (bss_section, (subsegT) temp);
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demand_empty_rest_of_line ();
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}
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void
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v850_offset (int ignore)
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{
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int temp = get_absolute_expression ();
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temp -= frag_now_fix();
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if (temp > 0)
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(void) frag_more (temp);
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demand_empty_rest_of_line ();
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}
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/* Copied from obj_elf_common() in gas/config/obj-elf.c */
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static void
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v850_comm (area)
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int area;
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{
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char * name;
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char c;
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char * p;
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int temp;
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int size;
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symbolS * symbolP;
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int have_align;
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name = input_line_pointer;
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c = get_symbol_end ();
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/* just after name is now '\0' */
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p = input_line_pointer;
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*p = c;
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SKIP_WHITESPACE ();
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if (*input_line_pointer != ',')
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{
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as_bad ("Expected comma after symbol-name");
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ignore_rest_of_line ();
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return;
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}
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input_line_pointer++; /* skip ',' */
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if ((temp = get_absolute_expression ()) < 0)
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{
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as_bad (".COMMon length (%d.) <0! Ignored.", temp);
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ignore_rest_of_line ();
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return;
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}
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size = temp;
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*p = 0;
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symbolP = symbol_find_or_make (name);
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*p = c;
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if (S_IS_DEFINED (symbolP) && ! S_IS_COMMON (symbolP))
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{
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as_bad ("Ignoring attempt to re-define symbol");
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ignore_rest_of_line ();
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return;
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}
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if (S_GET_VALUE (symbolP) != 0)
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{
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if (S_GET_VALUE (symbolP) != size)
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{
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as_warn ("Length of .comm \"%s\" is already %ld. Not changed to %d.",
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S_GET_NAME (symbolP), (long) S_GET_VALUE (symbolP), size);
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}
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}
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know (symbolP->sy_frag == &zero_address_frag);
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if (*input_line_pointer != ',')
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have_align = 0;
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else
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{
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have_align = 1;
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input_line_pointer++;
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SKIP_WHITESPACE ();
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}
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if (! have_align || *input_line_pointer != '"')
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{
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if (! have_align)
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temp = 0;
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else
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{
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temp = get_absolute_expression ();
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if (temp < 0)
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{
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temp = 0;
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as_warn ("Common alignment negative; 0 assumed");
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}
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}
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if (symbolP->local)
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{
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segT old_sec;
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int old_subsec;
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char * pfrag;
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int align;
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/* allocate_bss: */
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old_sec = now_seg;
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old_subsec = now_subseg;
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if (temp)
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{
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/* convert to a power of 2 alignment */
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for (align = 0; (temp & 1) == 0; temp >>= 1, ++align);
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if (temp != 1)
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{
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as_bad ("Common alignment not a power of 2");
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ignore_rest_of_line ();
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return;
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}
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}
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else
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align = 0;
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switch (area)
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{
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case AREA_SDA:
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record_alignment (sbss_section, align);
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obj_elf_section_change_hook();
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subseg_set (sbss_section, 0);
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break;
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case AREA_ZDA:
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record_alignment (zbss_section, align);
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obj_elf_section_change_hook();
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subseg_set (zbss_section, 0);
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break;
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case AREA_TDA:
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record_alignment (tbss_section, align);
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obj_elf_section_change_hook();
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subseg_set (tbss_section, 0);
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break;
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default:
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abort();
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}
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if (align)
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frag_align (align, 0, 0);
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switch (area)
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{
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case AREA_SDA:
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if (S_GET_SEGMENT (symbolP) == sbss_section)
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symbolP->sy_frag->fr_symbol = 0;
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break;
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case AREA_ZDA:
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if (S_GET_SEGMENT (symbolP) == zbss_section)
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symbolP->sy_frag->fr_symbol = 0;
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break;
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case AREA_TDA:
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if (S_GET_SEGMENT (symbolP) == tbss_section)
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symbolP->sy_frag->fr_symbol = 0;
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break;
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default:
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abort();
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}
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symbolP->sy_frag = frag_now;
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pfrag = frag_var (rs_org, 1, 1, (relax_substateT) 0, symbolP,
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(offsetT) size, (char *) 0);
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*pfrag = 0;
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S_SET_SIZE (symbolP, size);
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switch (area)
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{
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case AREA_SDA: S_SET_SEGMENT (symbolP, sbss_section); break;
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case AREA_ZDA: S_SET_SEGMENT (symbolP, zbss_section); break;
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case AREA_TDA: S_SET_SEGMENT (symbolP, tbss_section); break;
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default:
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abort();
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}
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S_CLEAR_EXTERNAL (symbolP);
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obj_elf_section_change_hook();
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subseg_set (old_sec, old_subsec);
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}
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else
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{
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allocate_common:
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S_SET_VALUE (symbolP, (valueT) size);
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S_SET_ALIGN (symbolP, temp);
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S_SET_EXTERNAL (symbolP);
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switch (area)
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{
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case AREA_SDA: S_SET_SEGMENT (symbolP, scommon_section); break;
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case AREA_ZDA: S_SET_SEGMENT (symbolP, zcommon_section); break;
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case AREA_TDA: S_SET_SEGMENT (symbolP, tcommon_section); break;
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default:
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abort();
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}
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}
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}
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else
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{
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input_line_pointer++;
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/* @@ Some use the dot, some don't. Can we get some consistency?? */
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if (*input_line_pointer == '.')
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input_line_pointer++;
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/* @@ Some say data, some say bss. */
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if (strncmp (input_line_pointer, "bss\"", 4)
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&& strncmp (input_line_pointer, "data\"", 5))
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{
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while (*--input_line_pointer != '"')
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;
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input_line_pointer--;
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goto bad_common_segment;
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}
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while (*input_line_pointer++ != '"')
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;
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goto allocate_common;
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}
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symbolP->bsym->flags |= BSF_OBJECT;
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demand_empty_rest_of_line ();
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return;
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{
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||
bad_common_segment:
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p = input_line_pointer;
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while (*p && *p != '\n')
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p++;
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c = *p;
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*p = '\0';
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as_bad ("bad .common segment %s", input_line_pointer + 1);
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*p = c;
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input_line_pointer = p;
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ignore_rest_of_line ();
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return;
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||
}
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||
}
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||
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void
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set_machine (int number)
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{
|
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machine = number;
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bfd_set_arch_mach (stdoutput, TARGET_ARCH, machine);
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||
|
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switch (machine)
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{
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case 0: processor_mask = PROCESSOR_V850; break;
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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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{"sdata", v850_sdata, 0},
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{"tdata", v850_tdata, 0},
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{"zdata", v850_zdata, 0},
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{"sbss", v850_sbss, 0},
|
||
{"tbss", v850_tbss, 0},
|
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{"zbss", v850_zbss, 0},
|
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{"rosdata", v850_rosdata, 0},
|
||
{"rozdata", v850_rozdata, 0},
|
||
{"bss", v850_bss, 0},
|
||
{"offset", v850_offset, 0},
|
||
{"word", cons, 4},
|
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{"zcomm", v850_comm, AREA_ZDA},
|
||
{"scomm", v850_comm, AREA_SDA},
|
||
{"tcomm", v850_comm, AREA_TDA},
|
||
{"v850", set_machine, 0},
|
||
{ NULL, NULL, 0}
|
||
};
|
||
|
||
/* Opcode hash table. */
|
||
static struct hash_control *v850_hash;
|
||
|
||
/* This table is sorted. Suitable for searching by a binary search. */
|
||
static const struct reg_name pre_defined_registers[] =
|
||
{
|
||
{ "ep", 30 }, /* ep - element ptr */
|
||
{ "gp", 4 }, /* gp - global ptr */
|
||
{ "hp", 2 }, /* hp - handler stack ptr */
|
||
{ "lp", 31 }, /* lp - link ptr */
|
||
{ "r0", 0 },
|
||
{ "r1", 1 },
|
||
{ "r10", 10 },
|
||
{ "r11", 11 },
|
||
{ "r12", 12 },
|
||
{ "r13", 13 },
|
||
{ "r14", 14 },
|
||
{ "r15", 15 },
|
||
{ "r16", 16 },
|
||
{ "r17", 17 },
|
||
{ "r18", 18 },
|
||
{ "r19", 19 },
|
||
{ "r2", 2 },
|
||
{ "r20", 20 },
|
||
{ "r21", 21 },
|
||
{ "r22", 22 },
|
||
{ "r23", 23 },
|
||
{ "r24", 24 },
|
||
{ "r25", 25 },
|
||
{ "r26", 26 },
|
||
{ "r27", 27 },
|
||
{ "r28", 28 },
|
||
{ "r29", 29 },
|
||
{ "r3", 3 },
|
||
{ "r30", 30 },
|
||
{ "r31", 31 },
|
||
{ "r4", 4 },
|
||
{ "r5", 5 },
|
||
{ "r6", 6 },
|
||
{ "r7", 7 },
|
||
{ "r8", 8 },
|
||
{ "r9", 9 },
|
||
{ "sp", 3 }, /* sp - stack ptr */
|
||
{ "tp", 5 }, /* tp - text ptr */
|
||
{ "zero", 0 },
|
||
};
|
||
#define REG_NAME_CNT (sizeof (pre_defined_registers) / sizeof (struct reg_name))
|
||
|
||
|
||
static const struct reg_name system_registers[] =
|
||
{
|
||
{ "ecr", 4 },
|
||
{ "eipc", 0 },
|
||
{ "eipsw", 1 },
|
||
{ "fepc", 2 },
|
||
{ "fepsw", 3 },
|
||
{ "psw", 5 },
|
||
};
|
||
#define SYSREG_NAME_CNT (sizeof (system_registers) / sizeof (struct reg_name))
|
||
|
||
|
||
static const struct reg_name cc_names[] =
|
||
{
|
||
{ "c", 0x1 },
|
||
{ "e", 0x2 },
|
||
{ "ge", 0xe },
|
||
{ "gt", 0xf },
|
||
{ "h", 0xb },
|
||
{ "l", 0x1 },
|
||
{ "le", 0x7 },
|
||
{ "lt", 0x6 },
|
||
{ "n", 0x4 },
|
||
{ "nc", 0x9 },
|
||
{ "ne", 0xa },
|
||
{ "nh", 0x3 },
|
||
{ "nl", 0x9 },
|
||
{ "ns", 0xc },
|
||
{ "nv", 0x8 },
|
||
{ "nz", 0xa },
|
||
{ "p", 0xc },
|
||
{ "s", 0x4 },
|
||
{ "sa", 0xd },
|
||
{ "t", 0x5 },
|
||
{ "v", 0x0 },
|
||
{ "z", 0x2 },
|
||
};
|
||
#define CC_NAME_CNT (sizeof (cc_names) / sizeof (struct reg_name))
|
||
|
||
/* reg_name_search does a binary search of the given register table
|
||
to see if "name" is a valid regiter name. Returns the register
|
||
number from the array on success, or -1 on failure. */
|
||
|
||
static int
|
||
reg_name_search (regs, regcount, name, accept_numbers)
|
||
const struct reg_name * regs;
|
||
int regcount;
|
||
const char * name;
|
||
boolean accept_numbers;
|
||
{
|
||
int middle, low, high;
|
||
int cmp;
|
||
symbolS * symbolP;
|
||
|
||
/* If the register name is a symbol, then evaluate it. */
|
||
if ((symbolP = symbol_find (name)) != NULL)
|
||
{
|
||
/* If the symbol is an alias for another name then use that.
|
||
If the symbol is an alias for a number, then return the number. */
|
||
if (symbolP->sy_value.X_op == O_symbol)
|
||
{
|
||
name = S_GET_NAME (symbolP->sy_value.X_add_symbol);
|
||
}
|
||
else if (accept_numbers)
|
||
{
|
||
int reg = S_GET_VALUE (symbolP);
|
||
|
||
if (reg >= 0 && reg <= 31)
|
||
return reg;
|
||
}
|
||
}
|
||
|
||
low = 0;
|
||
high = regcount - 1;
|
||
|
||
do
|
||
{
|
||
middle = (low + high) / 2;
|
||
cmp = strcasecmp (name, regs[middle].name);
|
||
if (cmp < 0)
|
||
high = middle - 1;
|
||
else if (cmp > 0)
|
||
low = middle + 1;
|
||
else
|
||
return regs[middle].value;
|
||
}
|
||
while (low <= high);
|
||
return -1;
|
||
}
|
||
|
||
|
||
/* Summary of register_name().
|
||
*
|
||
* in: Input_line_pointer points to 1st char of operand.
|
||
*
|
||
* out: A expressionS.
|
||
* The operand may have been a register: in this case, X_op == O_register,
|
||
* X_add_number is set to the register number, and truth is returned.
|
||
* Input_line_pointer->(next non-blank) char after operand, or is in
|
||
* its original state.
|
||
*/
|
||
static boolean
|
||
register_name (expressionP)
|
||
expressionS * expressionP;
|
||
{
|
||
int reg_number;
|
||
char * name;
|
||
char * start;
|
||
char c;
|
||
|
||
/* Find the spelling of the operand */
|
||
start = name = input_line_pointer;
|
||
|
||
c = get_symbol_end ();
|
||
|
||
reg_number = reg_name_search (pre_defined_registers, REG_NAME_CNT,
|
||
name, FALSE);
|
||
|
||
* input_line_pointer = c; /* put back the delimiting char */
|
||
|
||
/* look to see if it's in the register table */
|
||
if (reg_number >= 0)
|
||
{
|
||
expressionP->X_op = O_register;
|
||
expressionP->X_add_number = reg_number;
|
||
|
||
/* make the rest nice */
|
||
expressionP->X_add_symbol = NULL;
|
||
expressionP->X_op_symbol = NULL;
|
||
|
||
return true;
|
||
}
|
||
else
|
||
{
|
||
/* reset the line as if we had not done anything */
|
||
input_line_pointer = start;
|
||
|
||
return false;
|
||
}
|
||
}
|
||
|
||
/* Summary of system_register_name().
|
||
*
|
||
* in: Input_line_pointer points to 1st char of operand.
|
||
* expressionP points to an expression structure to be filled in.
|
||
* accept_numbers is true iff numerical register names may be used.
|
||
*
|
||
* out: A expressionS structure in expressionP.
|
||
* The operand may have been a register: in this case, X_op == O_register,
|
||
* X_add_number is set to the register number, and truth is returned.
|
||
* Input_line_pointer->(next non-blank) char after operand, or is in
|
||
* its original state.
|
||
*/
|
||
static boolean
|
||
system_register_name (expressionP, accept_numbers
|
||
)
|
||
expressionS * expressionP;
|
||
boolean accept_numbers;
|
||
{
|
||
int reg_number;
|
||
char * name;
|
||
char * start;
|
||
char c;
|
||
|
||
/* Find the spelling of the operand */
|
||
start = name = input_line_pointer;
|
||
|
||
c = get_symbol_end ();
|
||
reg_number = reg_name_search (system_registers, SYSREG_NAME_CNT, name,
|
||
accept_numbers);
|
||
|
||
* input_line_pointer = c; /* put back the delimiting char */
|
||
|
||
if (reg_number < 0
|
||
&& accept_numbers)
|
||
{
|
||
input_line_pointer = start; /* reset input_line pointer */
|
||
|
||
if (isdigit (* input_line_pointer))
|
||
{
|
||
reg_number = strtol (input_line_pointer, & input_line_pointer, 10);
|
||
|
||
/* Make sure that the register number is allowable. */
|
||
if ( reg_number < 0
|
||
|| reg_number > 5
|
||
)
|
||
{
|
||
reg_number = -1;
|
||
}
|
||
}
|
||
}
|
||
|
||
/* look to see if it's in the register table */
|
||
if (reg_number >= 0)
|
||
{
|
||
expressionP->X_op = O_register;
|
||
expressionP->X_add_number = reg_number;
|
||
|
||
/* make the rest nice */
|
||
expressionP->X_add_symbol = NULL;
|
||
expressionP->X_op_symbol = NULL;
|
||
|
||
return true;
|
||
}
|
||
else
|
||
{
|
||
/* reset the line as if we had not done anything */
|
||
input_line_pointer = start;
|
||
|
||
return false;
|
||
}
|
||
}
|
||
|
||
/* Summary of cc_name().
|
||
*
|
||
* in: Input_line_pointer points to 1st char of operand.
|
||
*
|
||
* out: A expressionS.
|
||
* The operand may have been a register: in this case, X_op == O_register,
|
||
* X_add_number is set to the register number, and truth is returned.
|
||
* Input_line_pointer->(next non-blank) char after operand, or is in
|
||
* its original state.
|
||
*/
|
||
static boolean
|
||
cc_name (expressionP)
|
||
expressionS * expressionP;
|
||
{
|
||
int reg_number;
|
||
char * name;
|
||
char * start;
|
||
char c;
|
||
|
||
/* Find the spelling of the operand */
|
||
start = name = input_line_pointer;
|
||
|
||
c = get_symbol_end ();
|
||
reg_number = reg_name_search (cc_names, CC_NAME_CNT, name, FALSE);
|
||
|
||
* input_line_pointer = c; /* put back the delimiting char */
|
||
|
||
/* look to see if it's in the register table */
|
||
if (reg_number >= 0)
|
||
{
|
||
expressionP->X_op = O_constant;
|
||
expressionP->X_add_number = reg_number;
|
||
|
||
/* make the rest nice */
|
||
expressionP->X_add_symbol = NULL;
|
||
expressionP->X_op_symbol = NULL;
|
||
|
||
return true;
|
||
}
|
||
else
|
||
{
|
||
/* reset the line as if we had not done anything */
|
||
input_line_pointer = start;
|
||
|
||
return false;
|
||
}
|
||
}
|
||
|
||
static void
|
||
skip_white_space (void)
|
||
{
|
||
while ( * input_line_pointer == ' '
|
||
|| * input_line_pointer == '\t')
|
||
++ input_line_pointer;
|
||
}
|
||
|
||
|
||
CONST char * md_shortopts = "m:";
|
||
|
||
struct option md_longopts[] =
|
||
{
|
||
{NULL, no_argument, NULL, 0}
|
||
};
|
||
size_t md_longopts_size = sizeof md_longopts;
|
||
|
||
|
||
void
|
||
md_show_usage (stream)
|
||
FILE * stream;
|
||
{
|
||
fprintf (stream, "V850 options:\n");
|
||
fprintf (stream, "\t-mwarn-signed-overflow Warn if signed immediate values overflow\n");
|
||
fprintf (stream, "\t-mwarn-unsigned-overflow Warn if unsigned immediate values overflow\n");
|
||
fprintf (stream, "\t-mv850 The code is targeted at the v850\n");
|
||
}
|
||
|
||
int
|
||
md_parse_option (c, arg)
|
||
int c;
|
||
char * arg;
|
||
{
|
||
if (c != 'm')
|
||
{
|
||
fprintf (stderr, "unknown command line option: -%c%s\n", c, arg);
|
||
return 0;
|
||
}
|
||
|
||
if (strcmp (arg, "warn-signed-overflow") == 0)
|
||
{
|
||
warn_signed_overflows = TRUE;
|
||
}
|
||
else if (strcmp (arg, "warn-unsigned-overflow") == 0)
|
||
{
|
||
warn_unsigned_overflows = TRUE;
|
||
}
|
||
else if (strcmp (arg, "v850") == 0)
|
||
{
|
||
machine = 0;
|
||
processor_mask = PROCESSOR_V850;
|
||
}
|
||
else
|
||
{
|
||
fprintf (stderr, "unknown command line option: -%c%s\n", c, arg);
|
||
return 0;
|
||
}
|
||
|
||
return 1;
|
||
}
|
||
|
||
symbolS *
|
||
md_undefined_symbol (name)
|
||
char * name;
|
||
{
|
||
return 0;
|
||
}
|
||
|
||
char *
|
||
md_atof (type, litp, sizep)
|
||
int type;
|
||
char * litp;
|
||
int * sizep;
|
||
{
|
||
int prec;
|
||
LITTLENUM_TYPE words[4];
|
||
char * t;
|
||
int i;
|
||
|
||
switch (type)
|
||
{
|
||
case 'f':
|
||
prec = 2;
|
||
break;
|
||
|
||
case 'd':
|
||
prec = 4;
|
||
break;
|
||
|
||
default:
|
||
*sizep = 0;
|
||
return "bad call to md_atof";
|
||
}
|
||
|
||
t = atof_ieee (input_line_pointer, type, words);
|
||
if (t)
|
||
input_line_pointer = t;
|
||
|
||
*sizep = prec * 2;
|
||
|
||
for (i = prec - 1; i >= 0; i--)
|
||
{
|
||
md_number_to_chars (litp, (valueT) words[i], 2);
|
||
litp += 2;
|
||
}
|
||
|
||
return NULL;
|
||
}
|
||
|
||
|
||
/* Very gross. */
|
||
void
|
||
md_convert_frag (abfd, sec, fragP)
|
||
bfd * abfd;
|
||
asection * sec;
|
||
fragS * fragP;
|
||
{
|
||
subseg_change (sec, 0);
|
||
|
||
/* In range conditional or unconditional branch. */
|
||
if (fragP->fr_subtype == 0 || fragP->fr_subtype == 2)
|
||
{
|
||
fix_new (fragP, fragP->fr_fix, 2, fragP->fr_symbol,
|
||
fragP->fr_offset, 1, BFD_RELOC_UNUSED + (int)fragP->fr_opcode);
|
||
fragP->fr_var = 0;
|
||
fragP->fr_fix += 2;
|
||
}
|
||
/* Out of range conditional branch. Emit a branch around a jump. */
|
||
else if (fragP->fr_subtype == 1)
|
||
{
|
||
unsigned char *buffer =
|
||
(unsigned char *) (fragP->fr_fix + fragP->fr_literal);
|
||
|
||
/* Reverse the condition of the first branch. */
|
||
buffer[0] ^= 0x08;
|
||
/* Mask off all the displacement bits. */
|
||
buffer[0] &= 0x8f;
|
||
buffer[1] &= 0x07;
|
||
/* Now set the displacement bits so that we branch
|
||
around the unconditional branch. */
|
||
buffer[0] |= 0x30;
|
||
|
||
/* Now create the unconditional branch + fixup to the final
|
||
target. */
|
||
md_number_to_chars (buffer + 2, 0x00000780, 4);
|
||
fix_new (fragP, fragP->fr_fix + 2, 4, fragP->fr_symbol,
|
||
fragP->fr_offset, 1, BFD_RELOC_UNUSED + (int) fragP->fr_opcode
|
||
+ 1);
|
||
fragP->fr_var = 0;
|
||
fragP->fr_fix += 6;
|
||
}
|
||
/* Out of range unconditional branch. Emit a jump. */
|
||
else if (fragP->fr_subtype == 3)
|
||
{
|
||
md_number_to_chars (fragP->fr_fix + fragP->fr_literal, 0x00000780, 4);
|
||
fix_new (fragP, fragP->fr_fix, 4, fragP->fr_symbol,
|
||
fragP->fr_offset, 1, BFD_RELOC_UNUSED + (int) fragP->fr_opcode
|
||
+ 1);
|
||
fragP->fr_var = 0;
|
||
fragP->fr_fix += 4;
|
||
}
|
||
else
|
||
abort ();
|
||
}
|
||
|
||
valueT
|
||
md_section_align (seg, addr)
|
||
asection * seg;
|
||
valueT addr;
|
||
{
|
||
int align = bfd_get_section_alignment (stdoutput, seg);
|
||
return ((addr + (1 << align) - 1) & (-1 << align));
|
||
}
|
||
|
||
void
|
||
md_begin ()
|
||
{
|
||
char * prev_name = "";
|
||
register const struct v850_opcode * op;
|
||
flagword applicable;
|
||
|
||
if (strncmp (TARGET_CPU, "v850", 4) == 0)
|
||
{
|
||
if (machine == -1)
|
||
machine = 0;
|
||
|
||
if (processor_mask == -1)
|
||
processor_mask = PROCESSOR_V850;
|
||
}
|
||
else
|
||
as_bad ("Unable to determine default target processor from string: %s",
|
||
TARGET_CPU);
|
||
|
||
v850_hash = hash_new();
|
||
|
||
/* Insert unique names into hash table. The V850 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 = v850_opcodes;
|
||
while (op->name)
|
||
{
|
||
if (strcmp (prev_name, op->name))
|
||
{
|
||
prev_name = (char *) op->name;
|
||
hash_insert (v850_hash, op->name, (char *) op);
|
||
}
|
||
op++;
|
||
}
|
||
|
||
bfd_set_arch_mach (stdoutput, TARGET_ARCH, machine);
|
||
|
||
applicable = bfd_applicable_section_flags (stdoutput);
|
||
|
||
sdata_section = subseg_new (".sdata", 0);
|
||
bfd_set_section_flags (stdoutput, sdata_section, applicable & (SEC_ALLOC | SEC_LOAD | SEC_RELOC | SEC_DATA | SEC_HAS_CONTENTS));
|
||
|
||
tdata_section = subseg_new (".tdata", 0);
|
||
bfd_set_section_flags (stdoutput, tdata_section, applicable & (SEC_ALLOC | SEC_LOAD | SEC_RELOC | SEC_DATA | SEC_HAS_CONTENTS));
|
||
|
||
zdata_section = subseg_new (".zdata", 0);
|
||
bfd_set_section_flags (stdoutput, zdata_section, applicable & (SEC_ALLOC | SEC_LOAD | SEC_RELOC | SEC_DATA | SEC_HAS_CONTENTS));
|
||
|
||
sbss_section = subseg_new (".sbss", 0);
|
||
bfd_set_section_flags (stdoutput, sbss_section, applicable & SEC_ALLOC);
|
||
seg_info (sbss_section)->bss = 1;
|
||
|
||
tbss_section = subseg_new (".tbss", 0);
|
||
bfd_set_section_flags (stdoutput, tbss_section, applicable & SEC_ALLOC);
|
||
seg_info (tbss_section)->bss = 1;
|
||
|
||
zbss_section = subseg_new (".zbss", 0);
|
||
bfd_set_section_flags (stdoutput, zbss_section, applicable & SEC_ALLOC);
|
||
seg_info (zbss_section)->bss = 1;
|
||
|
||
rosdata_section = subseg_new (".rosdata", 0);
|
||
bfd_set_section_flags (stdoutput, rosdata_section, applicable & (SEC_ALLOC | SEC_LOAD | SEC_RELOC | SEC_READONLY));
|
||
|
||
rozdata_section = subseg_new (".rozdata", 0);
|
||
bfd_set_section_flags (stdoutput, rozdata_section, applicable & (SEC_ALLOC | SEC_LOAD | SEC_RELOC | SEC_READONLY));
|
||
|
||
scommon_section = subseg_new (".scommon", 0);
|
||
bfd_set_section_flags (stdoutput, scommon_section, applicable & (SEC_ALLOC | SEC_LOAD | SEC_RELOC | SEC_DATA | SEC_HAS_CONTENTS | SEC_IS_COMMON));
|
||
|
||
zcommon_section = subseg_new (".zcommon", 0);
|
||
bfd_set_section_flags (stdoutput, zcommon_section, applicable & (SEC_ALLOC | SEC_LOAD | SEC_RELOC | SEC_DATA | SEC_HAS_CONTENTS | SEC_IS_COMMON));
|
||
|
||
tcommon_section = subseg_new (".tcommon", 0);
|
||
bfd_set_section_flags (stdoutput, tcommon_section, applicable & (SEC_ALLOC | SEC_LOAD | SEC_RELOC | SEC_DATA | SEC_HAS_CONTENTS | SEC_IS_COMMON));
|
||
|
||
}
|
||
|
||
|
||
|
||
static bfd_reloc_code_real_type
|
||
handle_sdaoff (const struct v850_operand * operand)
|
||
{
|
||
if (operand == NULL) return BFD_RELOC_V850_SDA_16_16_OFFSET;
|
||
if (operand->bits == 15 && operand->shift == 17) return BFD_RELOC_V850_SDA_15_16_OFFSET;
|
||
|
||
if ( operand->bits != 16
|
||
|| operand->shift != 16)
|
||
{
|
||
as_bad ("sdaoff() relocation used on an instruction which does not support it");
|
||
return BFD_RELOC_64; /* Used to indicate an error condition. */
|
||
}
|
||
|
||
return BFD_RELOC_V850_SDA_16_16_OFFSET;
|
||
}
|
||
|
||
static bfd_reloc_code_real_type
|
||
handle_zdaoff (const struct v850_operand * operand)
|
||
{
|
||
if (operand == NULL) return BFD_RELOC_V850_ZDA_16_16_OFFSET;
|
||
if (operand->bits == 15 && operand->shift == 17) return BFD_RELOC_V850_ZDA_15_16_OFFSET;
|
||
|
||
if ( operand->bits != 16
|
||
|| operand->shift != 16)
|
||
{
|
||
as_bad ("zdaoff() relocation used on an instruction which does not support it");
|
||
return BFD_RELOC_64; /* Used to indicate an error condition. */
|
||
}
|
||
|
||
return BFD_RELOC_V850_ZDA_16_16_OFFSET;
|
||
}
|
||
|
||
static bfd_reloc_code_real_type
|
||
handle_tdaoff (const struct v850_operand * operand)
|
||
{
|
||
if (operand == NULL) return BFD_RELOC_V850_TDA_7_7_OFFSET; /* data item, not an instruction. */
|
||
if (operand->bits == 6 && operand->shift == 1) return BFD_RELOC_V850_TDA_6_8_OFFSET; /* sld.w/sst.w, operand: D8_6 */
|
||
if (operand->bits == 16 && operand->shift == 16) return BFD_RELOC_V850_TDA_16_16_OFFSET; /* set1 & chums, operands: D16 */
|
||
|
||
if (operand->bits != 7)
|
||
{
|
||
as_bad ("tdaoff() relocation used on an instruction which does not support it");
|
||
return BFD_RELOC_64; /* Used to indicate an error condition. */
|
||
}
|
||
|
||
return operand->insert != NULL
|
||
? BFD_RELOC_V850_TDA_7_8_OFFSET /* sld.h/sst.h, operand: D8_7 */
|
||
: BFD_RELOC_V850_TDA_7_7_OFFSET; /* sld.b/sst.b, opreand: D7 */
|
||
}
|
||
|
||
/* Warning: The code in this function relies upon the definitions
|
||
in the v850_operands[] array (defined in opcodes/v850-opc.c)
|
||
matching the hard coded values contained herein. */
|
||
|
||
static bfd_reloc_code_real_type
|
||
v850_reloc_prefix (const struct v850_operand * operand)
|
||
{
|
||
boolean paren_skipped = false;
|
||
|
||
|
||
/* Skip leading opening parenthesis. */
|
||
if (* input_line_pointer == '(')
|
||
{
|
||
++ input_line_pointer;
|
||
paren_skipped = true;
|
||
}
|
||
|
||
#define CHECK_(name, reloc) \
|
||
if (strncmp (input_line_pointer, name##"(", strlen (name) + 1) == 0) \
|
||
{ \
|
||
input_line_pointer += strlen (name); \
|
||
return reloc; \
|
||
}
|
||
|
||
CHECK_ ("hi0", BFD_RELOC_HI16);
|
||
CHECK_ ("hi", BFD_RELOC_HI16_S);
|
||
CHECK_ ("lo", BFD_RELOC_LO16);
|
||
CHECK_ ("sdaoff", handle_sdaoff (operand));
|
||
CHECK_ ("zdaoff", handle_zdaoff (operand));
|
||
CHECK_ ("tdaoff", handle_tdaoff (operand));
|
||
|
||
|
||
/* Restore skipped parenthesis. */
|
||
if (paren_skipped)
|
||
-- input_line_pointer;
|
||
|
||
return BFD_RELOC_UNUSED;
|
||
}
|
||
|
||
/* Insert an operand value into an instruction. */
|
||
|
||
static unsigned long
|
||
v850_insert_operand (insn, operand, val, file, line, str)
|
||
unsigned long insn;
|
||
const struct v850_operand * operand;
|
||
offsetT val;
|
||
char * file;
|
||
unsigned int line;
|
||
char * str;
|
||
{
|
||
if (operand->insert)
|
||
{
|
||
const char * message = NULL;
|
||
|
||
insn = operand->insert (insn, val, & message);
|
||
if (message != NULL)
|
||
{
|
||
if ((operand->flags & V850_OPERAND_SIGNED)
|
||
&& ! warn_signed_overflows
|
||
&& strstr (message, "out of range") != NULL)
|
||
{
|
||
/* skip warning... */
|
||
}
|
||
else if ((operand->flags & V850_OPERAND_SIGNED) == 0
|
||
&& ! warn_unsigned_overflows
|
||
&& strstr (message, "out of range") != NULL)
|
||
{
|
||
/* skip warning... */
|
||
}
|
||
else if (str)
|
||
{
|
||
if (file == (char *) NULL)
|
||
as_warn ("%s: %s", str, message);
|
||
else
|
||
as_warn_where (file, line, "%s: %s", str, message);
|
||
}
|
||
else
|
||
{
|
||
if (file == (char *) NULL)
|
||
as_warn (message);
|
||
else
|
||
as_warn_where (file, line, message);
|
||
}
|
||
}
|
||
}
|
||
else
|
||
{
|
||
if (operand->bits != 32)
|
||
{
|
||
long min, max;
|
||
offsetT test;
|
||
|
||
if ((operand->flags & V850_OPERAND_SIGNED) != 0)
|
||
{
|
||
if (! warn_signed_overflows)
|
||
max = (1 << operand->bits) - 1;
|
||
else
|
||
max = (1 << (operand->bits - 1)) - 1;
|
||
|
||
min = - (1 << (operand->bits - 1));
|
||
}
|
||
else
|
||
{
|
||
max = (1 << operand->bits) - 1;
|
||
|
||
if (! warn_unsigned_overflows)
|
||
min = - (1 << (operand->bits - 1));
|
||
else
|
||
min = 0;
|
||
}
|
||
|
||
if (val < (offsetT) min || val > (offsetT) max)
|
||
{
|
||
const char * err = "operand out of range (%s not between %ld and %ld)";
|
||
char buf[100];
|
||
|
||
/* Restore min and mix to expected values for decimal ranges. */
|
||
if ((operand->flags & V850_OPERAND_SIGNED)
|
||
&& ! warn_signed_overflows)
|
||
max = (1 << (operand->bits - 1)) - 1;
|
||
|
||
if (! (operand->flags & V850_OPERAND_SIGNED)
|
||
&& ! warn_unsigned_overflows)
|
||
min = 0;
|
||
|
||
if (str)
|
||
{
|
||
sprintf (buf, "%s: ", str);
|
||
|
||
sprint_value (buf + strlen (buf), val);
|
||
}
|
||
else
|
||
sprint_value (buf, val);
|
||
|
||
if (file == (char *) NULL)
|
||
as_warn (err, buf, min, max);
|
||
else
|
||
as_warn_where (file, line, err, buf, min, max);
|
||
}
|
||
}
|
||
|
||
insn |= (((long) val & ((1 << operand->bits) - 1)) << operand->shift);
|
||
}
|
||
|
||
return insn;
|
||
}
|
||
|
||
|
||
static char copy_of_instruction [128];
|
||
|
||
void
|
||
md_assemble (str)
|
||
char * str;
|
||
{
|
||
char * s;
|
||
char * start_of_operands;
|
||
struct v850_opcode * opcode;
|
||
struct v850_opcode * next_opcode;
|
||
const unsigned char * opindex_ptr;
|
||
int next_opindex;
|
||
int relaxable;
|
||
unsigned long insn;
|
||
unsigned long insn_size;
|
||
char * f;
|
||
int i;
|
||
int match;
|
||
boolean extra_data_after_insn = false;
|
||
unsigned extra_data_len;
|
||
unsigned long extra_data;
|
||
char * saved_input_line_pointer;
|
||
|
||
|
||
strncpy (copy_of_instruction, str, sizeof (copy_of_instruction) - 1);
|
||
|
||
/* Get the opcode. */
|
||
for (s = str; *s != '\0' && ! isspace (*s); s++)
|
||
continue;
|
||
|
||
if (*s != '\0')
|
||
*s++ = '\0';
|
||
|
||
/* find the first opcode with the proper name */
|
||
opcode = (struct v850_opcode *) hash_find (v850_hash, str);
|
||
if (opcode == NULL)
|
||
{
|
||
as_bad ("Unrecognized opcode: `%s'", str);
|
||
ignore_rest_of_line ();
|
||
return;
|
||
}
|
||
|
||
str = s;
|
||
while (isspace (* str))
|
||
++ str;
|
||
|
||
start_of_operands = str;
|
||
|
||
saved_input_line_pointer = input_line_pointer;
|
||
|
||
for (;;)
|
||
{
|
||
const char * errmsg = NULL;
|
||
|
||
match = 0;
|
||
|
||
if ((opcode->processors & processor_mask) == 0)
|
||
{
|
||
errmsg = "Target processor does not support this instruction.";
|
||
goto error;
|
||
}
|
||
|
||
relaxable = 0;
|
||
fc = 0;
|
||
next_opindex = 0;
|
||
insn = opcode->opcode;
|
||
extra_data_after_insn = false;
|
||
|
||
input_line_pointer = str = start_of_operands;
|
||
|
||
for (opindex_ptr = opcode->operands; *opindex_ptr != 0; opindex_ptr ++)
|
||
{
|
||
const struct v850_operand * operand;
|
||
char * hold;
|
||
expressionS ex;
|
||
bfd_reloc_code_real_type reloc;
|
||
|
||
if (next_opindex == 0)
|
||
{
|
||
operand = & v850_operands[ * opindex_ptr ];
|
||
}
|
||
else
|
||
{
|
||
operand = & v850_operands[ next_opindex ];
|
||
next_opindex = 0;
|
||
}
|
||
|
||
errmsg = NULL;
|
||
|
||
while (*str == ' ' || *str == ',' || *str == '[' || *str == ']')
|
||
++ str;
|
||
|
||
if (operand->flags & V850_OPERAND_RELAX)
|
||
relaxable = 1;
|
||
|
||
/* Gather the operand. */
|
||
hold = input_line_pointer;
|
||
input_line_pointer = str;
|
||
|
||
/* lo(), hi(), hi0(), etc... */
|
||
if ((reloc = v850_reloc_prefix (operand)) != BFD_RELOC_UNUSED)
|
||
{
|
||
/* This is a fake reloc, used to indicate an error condition. */
|
||
if (reloc == BFD_RELOC_64)
|
||
{
|
||
match = 1;
|
||
goto error;
|
||
}
|
||
|
||
expression (& ex);
|
||
|
||
if (ex.X_op == O_constant)
|
||
{
|
||
switch (reloc)
|
||
{
|
||
case BFD_RELOC_V850_ZDA_16_16_OFFSET:
|
||
/* To cope with "not1 7, zdaoff(0xfffff006)[r0]"
|
||
and the like. */
|
||
/* Fall through. */
|
||
|
||
case BFD_RELOC_LO16:
|
||
{
|
||
/* Truncate, then sign extend the value. */
|
||
ex.X_add_number = SEXT16 (ex.X_add_number);
|
||
break;
|
||
}
|
||
|
||
case BFD_RELOC_HI16:
|
||
{
|
||
/* Truncate, then sign extend the value. */
|
||
ex.X_add_number = SEXT16 (ex.X_add_number >> 16);
|
||
break;
|
||
}
|
||
|
||
case BFD_RELOC_HI16_S:
|
||
{
|
||
/* Truncate, then sign extend the value. */
|
||
int temp = (ex.X_add_number >> 16) & 0xffff;
|
||
|
||
temp += (ex.X_add_number >> 15) & 1;
|
||
|
||
ex.X_add_number = SEXT16 (temp);
|
||
break;
|
||
}
|
||
|
||
|
||
default:
|
||
fprintf (stderr, "reloc: %d\n", reloc);
|
||
as_bad ("AAARG -> unhandled constant reloc");
|
||
break;
|
||
}
|
||
|
||
insn = v850_insert_operand (insn, operand, ex.X_add_number,
|
||
(char *) NULL, 0,
|
||
copy_of_instruction);
|
||
}
|
||
else
|
||
{
|
||
|
||
if (fc > MAX_INSN_FIXUPS)
|
||
as_fatal ("too many fixups");
|
||
|
||
fixups[ fc ].exp = ex;
|
||
fixups[ fc ].opindex = * opindex_ptr;
|
||
fixups[ fc ].reloc = reloc;
|
||
fc++;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
errmsg = NULL;
|
||
|
||
if ((operand->flags & V850_OPERAND_REG) != 0)
|
||
{
|
||
if (!register_name (& ex))
|
||
{
|
||
errmsg = "invalid register name";
|
||
}
|
||
else if ((operand->flags & V850_NOT_R0)
|
||
&& ex.X_add_number == 0)
|
||
{
|
||
errmsg = "register r0 cannot be used here";
|
||
|
||
/* Force an error message to be generated by
|
||
skipping over any following potential matches
|
||
for this opcode. */
|
||
opcode += 3;
|
||
}
|
||
}
|
||
else if ((operand->flags & V850_OPERAND_SRG) != 0)
|
||
{
|
||
if (!system_register_name (& ex, true
|
||
))
|
||
{
|
||
errmsg = "invalid system register name";
|
||
}
|
||
}
|
||
else if ((operand->flags & V850_OPERAND_EP) != 0)
|
||
{
|
||
char * start = input_line_pointer;
|
||
char c = get_symbol_end ();
|
||
|
||
if (strcmp (start, "ep") != 0 && strcmp (start, "r30") != 0)
|
||
{
|
||
/* Put things back the way we found them. */
|
||
*input_line_pointer = c;
|
||
input_line_pointer = start;
|
||
errmsg = "expected EP register";
|
||
goto error;
|
||
}
|
||
|
||
*input_line_pointer = c;
|
||
str = input_line_pointer;
|
||
input_line_pointer = hold;
|
||
|
||
while ( *str == ' ' || *str == ',' || *str == '['
|
||
|| *str == ']')
|
||
++ str;
|
||
continue;
|
||
}
|
||
else if ((operand->flags & V850_OPERAND_CC) != 0)
|
||
{
|
||
if (!cc_name (& ex))
|
||
{
|
||
errmsg = "invalid condition code name";
|
||
}
|
||
}
|
||
else if (register_name (& ex)
|
||
&& (operand->flags & V850_OPERAND_REG) == 0)
|
||
{
|
||
/* It is possible that an alias has been defined that
|
||
matches a register name. For example the code may
|
||
include a ".set ZERO, 0" directive, which matches
|
||
the register name "zero". Attempt to reparse the
|
||
field as an expression, and only complain if we
|
||
cannot generate a constant. */
|
||
|
||
input_line_pointer = str;
|
||
|
||
expression (& ex);
|
||
|
||
if (ex.X_op != O_constant)
|
||
{
|
||
/* If this register is actually occuring too early on
|
||
the parsing of the instruction, (because another
|
||
field is missing) then report this. */
|
||
if (opindex_ptr[1] != 0
|
||
&& (v850_operands [opindex_ptr [1]].flags & V850_OPERAND_REG))
|
||
errmsg = "syntax error: value is missing before the register name";
|
||
else
|
||
errmsg = "syntax error: register not expected";
|
||
}
|
||
}
|
||
else if (system_register_name (& ex, false
|
||
)
|
||
&& (operand->flags & V850_OPERAND_SRG) == 0)
|
||
{
|
||
errmsg = "syntax error: system register not expected";
|
||
}
|
||
else if (cc_name (&ex)
|
||
&& (operand->flags & V850_OPERAND_CC) == 0)
|
||
{
|
||
errmsg = "syntax error: condition code not expected";
|
||
}
|
||
else
|
||
{
|
||
expression (& ex);
|
||
}
|
||
|
||
if (errmsg)
|
||
goto error;
|
||
|
||
/* fprintf (stderr, " insn: %x, operand %d, op: %d, add_number: %d\n", insn, opindex_ptr - opcode->operands, ex.X_op, ex.X_add_number); */
|
||
|
||
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 & (V850_OPERAND_REG | V850_OPERAND_SRG)) == 0)
|
||
{
|
||
errmsg = "invalid operand";
|
||
goto error;
|
||
}
|
||
insn = v850_insert_operand (insn, operand, ex.X_add_number,
|
||
(char *) NULL, 0,
|
||
copy_of_instruction);
|
||
break;
|
||
|
||
case O_constant:
|
||
insn = v850_insert_operand (insn, operand, ex.X_add_number,
|
||
(char *) NULL, 0,
|
||
copy_of_instruction);
|
||
break;
|
||
|
||
default:
|
||
/* 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;
|
||
}
|
||
}
|
||
|
||
str = input_line_pointer;
|
||
input_line_pointer = hold;
|
||
|
||
while (*str == ' ' || *str == ',' || *str == '[' || *str == ']'
|
||
|| *str == ')')
|
||
++str;
|
||
}
|
||
match = 1;
|
||
|
||
error:
|
||
if (match == 0)
|
||
{
|
||
next_opcode = opcode + 1;
|
||
if (next_opcode->name != NULL
|
||
&& strcmp (next_opcode->name, opcode->name) == 0)
|
||
{
|
||
opcode = next_opcode;
|
||
|
||
/* Skip versions that are not supported by the target
|
||
processor. */
|
||
if ((opcode->processors & processor_mask) == 0)
|
||
goto error;
|
||
|
||
continue;
|
||
}
|
||
|
||
as_bad ("%s: %s", copy_of_instruction, errmsg);
|
||
|
||
if (* input_line_pointer == ']')
|
||
++ input_line_pointer;
|
||
|
||
ignore_rest_of_line ();
|
||
input_line_pointer = saved_input_line_pointer;
|
||
return;
|
||
}
|
||
break;
|
||
}
|
||
|
||
while (isspace (*str))
|
||
++str;
|
||
|
||
if (*str != '\0')
|
||
as_bad ("junk at end of line: `%s'", str);
|
||
|
||
input_line_pointer = str;
|
||
|
||
/* Write out the instruction. */
|
||
|
||
if (relaxable && fc > 0)
|
||
{
|
||
insn_size = 2;
|
||
fc = 0;
|
||
|
||
if (!strcmp (opcode->name, "br"))
|
||
{
|
||
f = frag_var (rs_machine_dependent, 4, 2, 2,
|
||
fixups[0].exp.X_add_symbol,
|
||
fixups[0].exp.X_add_number,
|
||
(char *)fixups[0].opindex);
|
||
md_number_to_chars (f, insn, insn_size);
|
||
md_number_to_chars (f + 2, 0, 2);
|
||
}
|
||
else
|
||
{
|
||
f = frag_var (rs_machine_dependent, 6, 4, 0,
|
||
fixups[0].exp.X_add_symbol,
|
||
fixups[0].exp.X_add_number,
|
||
(char *)fixups[0].opindex);
|
||
md_number_to_chars (f, insn, insn_size);
|
||
md_number_to_chars (f + 2, 0, 4);
|
||
}
|
||
}
|
||
else
|
||
{
|
||
/* Four byte insns have an opcode with the two high bits on. */
|
||
if ((insn & 0x0600) == 0x0600)
|
||
insn_size = 4;
|
||
else
|
||
insn_size = 2;
|
||
|
||
|
||
f = frag_more (insn_size);
|
||
|
||
md_number_to_chars (f, insn, insn_size);
|
||
|
||
if (extra_data_after_insn)
|
||
{
|
||
f = frag_more (extra_data_len);
|
||
|
||
md_number_to_chars (f, extra_data, extra_data_len);
|
||
|
||
extra_data_after_insn = false;
|
||
}
|
||
}
|
||
|
||
/* Create any fixups. At this point we do not use a
|
||
bfd_reloc_code_real_type, but instead just use the
|
||
BFD_RELOC_UNUSED plus the operand index. This lets us easily
|
||
handle fixups for any operand type, although that is admittedly
|
||
not a very exciting feature. We pick a BFD reloc type in
|
||
md_apply_fix. */
|
||
for (i = 0; i < fc; i++)
|
||
{
|
||
const struct v850_operand * operand;
|
||
bfd_reloc_code_real_type reloc;
|
||
|
||
operand = & v850_operands[ fixups[i].opindex ];
|
||
|
||
reloc = fixups[i].reloc;
|
||
|
||
if (reloc != BFD_RELOC_UNUSED)
|
||
{
|
||
reloc_howto_type * reloc_howto = bfd_reloc_type_lookup (stdoutput,
|
||
reloc);
|
||
int size;
|
||
int address;
|
||
fixS * fixP;
|
||
|
||
if (!reloc_howto)
|
||
abort();
|
||
|
||
size = bfd_get_reloc_size (reloc_howto);
|
||
|
||
/* XXX This will abort on an R_V850_8 reloc -
|
||
is this reloc actually used ? */
|
||
if (size != 2 && size != 4)
|
||
abort();
|
||
|
||
address = (f - frag_now->fr_literal) + insn_size - size;
|
||
|
||
if (reloc == BFD_RELOC_32)
|
||
{
|
||
address += 2;
|
||
}
|
||
|
||
fixP = fix_new_exp (frag_now, address, size,
|
||
& fixups[i].exp,
|
||
reloc_howto->pc_relative,
|
||
reloc);
|
||
|
||
switch (reloc)
|
||
{
|
||
case BFD_RELOC_LO16:
|
||
case BFD_RELOC_HI16:
|
||
case BFD_RELOC_HI16_S:
|
||
fixP->fx_no_overflow = 1;
|
||
break;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
fix_new_exp (
|
||
frag_now,
|
||
f - frag_now->fr_literal, 4,
|
||
& fixups[i].exp,
|
||
1 /* FIXME: V850_OPERAND_RELATIVE ??? */,
|
||
(bfd_reloc_code_real_type) (fixups[i].opindex
|
||
+ (int) BFD_RELOC_UNUSED)
|
||
);
|
||
}
|
||
}
|
||
|
||
input_line_pointer = saved_input_line_pointer;
|
||
}
|
||
|
||
|
||
/* If while processing a fixup, a reloc really needs to be created */
|
||
/* then it is done here. */
|
||
|
||
arelent *
|
||
tc_gen_reloc (seg, fixp)
|
||
asection * seg;
|
||
fixS * fixp;
|
||
{
|
||
arelent * reloc;
|
||
|
||
reloc = (arelent *) xmalloc (sizeof (arelent));
|
||
reloc->sym_ptr_ptr = & fixp->fx_addsy->bsym;
|
||
reloc->address = fixp->fx_frag->fr_address + fixp->fx_where;
|
||
reloc->howto = bfd_reloc_type_lookup (stdoutput, fixp->fx_r_type);
|
||
|
||
if (reloc->howto == (reloc_howto_type *) NULL)
|
||
{
|
||
as_bad_where (fixp->fx_file, fixp->fx_line,
|
||
"reloc %d not supported by object file format",
|
||
(int)fixp->fx_r_type);
|
||
|
||
xfree (reloc);
|
||
|
||
return NULL;
|
||
}
|
||
|
||
reloc->addend = fixp->fx_addnumber;
|
||
|
||
return reloc;
|
||
}
|
||
|
||
/* Assume everything will fit in two bytes, then expand as necessary. */
|
||
int
|
||
md_estimate_size_before_relax (fragp, seg)
|
||
fragS * fragp;
|
||
asection * seg;
|
||
{
|
||
if (fragp->fr_subtype == 0)
|
||
fragp->fr_var = 4;
|
||
else if (fragp->fr_subtype == 2)
|
||
fragp->fr_var = 2;
|
||
else
|
||
abort ();
|
||
return 2;
|
||
}
|
||
|
||
long
|
||
md_pcrel_from (fixp)
|
||
fixS * fixp;
|
||
{
|
||
/* If the symbol is undefined, or in a section other than our own,
|
||
then let the linker figure it out. */
|
||
if (fixp->fx_addsy != (symbolS *) NULL && ! S_IS_DEFINED (fixp->fx_addsy))
|
||
{
|
||
/* The symbol is undefined. Let the linker figure it out. */
|
||
return 0;
|
||
}
|
||
return fixp->fx_frag->fr_address + fixp->fx_where;
|
||
}
|
||
|
||
int
|
||
md_apply_fix3 (fixp, valuep, seg)
|
||
fixS * fixp;
|
||
valueT * valuep;
|
||
segT seg;
|
||
{
|
||
valueT value;
|
||
char * where;
|
||
|
||
if (fixp->fx_addsy == (symbolS *) NULL)
|
||
{
|
||
value = * valuep;
|
||
fixp->fx_done = 1;
|
||
}
|
||
else if (fixp->fx_pcrel)
|
||
value = * valuep;
|
||
else
|
||
{
|
||
value = fixp->fx_offset;
|
||
if (fixp->fx_subsy != (symbolS *) NULL)
|
||
{
|
||
if (S_GET_SEGMENT (fixp->fx_subsy) == absolute_section)
|
||
value -= S_GET_VALUE (fixp->fx_subsy);
|
||
else
|
||
{
|
||
/* We don't actually support subtracting a symbol. */
|
||
as_bad_where (fixp->fx_file, fixp->fx_line,
|
||
"expression too complex");
|
||
}
|
||
}
|
||
}
|
||
|
||
if ((int) fixp->fx_r_type >= (int) BFD_RELOC_UNUSED)
|
||
{
|
||
int opindex;
|
||
const struct v850_operand * operand;
|
||
unsigned long insn;
|
||
|
||
opindex = (int) fixp->fx_r_type - (int) BFD_RELOC_UNUSED;
|
||
operand = & v850_operands[ opindex ];
|
||
|
||
/* Fetch the instruction, insert the fully resolved operand
|
||
value, and stuff the instruction back again.
|
||
|
||
Note the instruction has been stored in little endian
|
||
format! */
|
||
where = fixp->fx_frag->fr_literal + fixp->fx_where;
|
||
|
||
insn = bfd_getl32 ((unsigned char *) where);
|
||
insn = v850_insert_operand (insn, operand, (offsetT) value,
|
||
fixp->fx_file, fixp->fx_line, NULL);
|
||
bfd_putl32 ((bfd_vma) insn, (unsigned char *) where);
|
||
|
||
if (fixp->fx_done)
|
||
{
|
||
/* Nothing else to do here. */
|
||
return 1;
|
||
}
|
||
|
||
/* Determine a BFD reloc value based on the operand information.
|
||
We are only prepared to turn a few of the operands into relocs. */
|
||
|
||
if (operand->bits == 22)
|
||
fixp->fx_r_type = BFD_RELOC_V850_22_PCREL;
|
||
else if (operand->bits == 9)
|
||
fixp->fx_r_type = BFD_RELOC_V850_9_PCREL;
|
||
else
|
||
{
|
||
/* fprintf (stderr, "bits: %d, insn: %x\n", operand->bits, insn); */
|
||
|
||
as_bad_where(fixp->fx_file, fixp->fx_line,
|
||
"unresolved expression that must be resolved");
|
||
fixp->fx_done = 1;
|
||
return 1;
|
||
}
|
||
}
|
||
else if (fixp->fx_done)
|
||
{
|
||
/* We still have to insert the value into memory! */
|
||
where = fixp->fx_frag->fr_literal + fixp->fx_where;
|
||
|
||
if (fixp->fx_size == 1)
|
||
*where = value & 0xff;
|
||
else if (fixp->fx_size == 2)
|
||
bfd_putl16 (value & 0xffff, (unsigned char *) where);
|
||
else if (fixp->fx_size == 4)
|
||
bfd_putl32 (value, (unsigned char *) where);
|
||
}
|
||
|
||
fixp->fx_addnumber = value;
|
||
return 1;
|
||
}
|
||
|
||
|
||
/* Parse a cons expression. We have to handle hi(), lo(), etc
|
||
on the v850. */
|
||
void
|
||
parse_cons_expression_v850 (exp)
|
||
expressionS *exp;
|
||
{
|
||
/* See if there's a reloc prefix like hi() we have to handle. */
|
||
hold_cons_reloc = v850_reloc_prefix (NULL);
|
||
|
||
/* Do normal expression parsing. */
|
||
expression (exp);
|
||
}
|
||
|
||
/* Create a fixup for a cons expression. If parse_cons_expression_v850
|
||
found a reloc prefix, then we use that reloc, else we choose an
|
||
appropriate one based on the size of the expression. */
|
||
void
|
||
cons_fix_new_v850 (frag, where, size, exp)
|
||
fragS *frag;
|
||
int where;
|
||
int size;
|
||
expressionS *exp;
|
||
{
|
||
if (hold_cons_reloc == BFD_RELOC_UNUSED)
|
||
{
|
||
if (size == 4)
|
||
hold_cons_reloc = BFD_RELOC_32;
|
||
if (size == 2)
|
||
hold_cons_reloc = BFD_RELOC_16;
|
||
if (size == 1)
|
||
hold_cons_reloc = BFD_RELOC_8;
|
||
}
|
||
|
||
if (exp != NULL)
|
||
fix_new_exp (frag, where, size, exp, 0, hold_cons_reloc);
|
||
else
|
||
fix_new (frag, where, size, NULL, 0, 0, hold_cons_reloc);
|
||
}
|