1460 lines
32 KiB
C
1460 lines
32 KiB
C
/* tc-pdp11.c - pdp11-specific -
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Copyright 2001, 2002, 2004, 2005, 2007 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, 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 "opcode/pdp11.h"
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extern int flonum_gen2vax (int, FLONUM_TYPE * f, LITTLENUM_TYPE *);
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#define TRUE 1
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#define FALSE 0
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/* A representation for PDP-11 machine code. */
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struct pdp11_code
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{
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char *error;
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int code;
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int additional; /* Is there an additional word? */
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int word; /* Additional word, if any. */
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struct
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{
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bfd_reloc_code_real_type type;
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expressionS exp;
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int pc_rel;
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} reloc;
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};
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/* Instruction set extensions.
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If you change this from an array to something else, please update
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the "PDP-11 instruction set extensions" comment in pdp11.h. */
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int pdp11_extension[PDP11_EXT_NUM];
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/* Assembly options. */
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#define ASM_OPT_PIC 1
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#define ASM_OPT_NUM 2
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int asm_option[ASM_OPT_NUM];
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/* These chars start a comment anywhere in a source file (except inside
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another comment. */
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const char comment_chars[] = "#/";
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/* These chars only start a comment at the beginning of a line. */
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const char line_comment_chars[] = "#/";
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const char line_separator_chars[] = ";";
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/* Chars that can be used to separate mant from exp in floating point nums. */
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const char EXP_CHARS[] = "eE";
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/* Chars that mean this number is a floating point constant. */
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/* as in 0f123.456. */
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/* or 0H1.234E-12 (see exp chars above). */
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const char FLT_CHARS[] = "dDfF";
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void pseudo_even (int);
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void pseudo_bss (int);
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const pseudo_typeS md_pseudo_table[] =
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{
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{ "bss", pseudo_bss, 0 },
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{ "even", pseudo_even, 0 },
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{ 0, 0, 0 },
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};
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static struct hash_control *insn_hash = NULL;
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static int
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set_option (char *arg)
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{
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int yes = 1;
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if (strcmp (arg, "all-extensions") == 0
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|| strcmp (arg, "all") == 0)
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{
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memset (pdp11_extension, ~0, sizeof pdp11_extension);
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pdp11_extension[PDP11_NONE] = 0;
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return 1;
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}
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else if (strcmp (arg, "no-extensions") == 0)
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{
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memset (pdp11_extension, 0, sizeof pdp11_extension);
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pdp11_extension[PDP11_BASIC] = 1;
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return 1;
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}
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if (strncmp (arg, "no-", 3) == 0)
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{
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yes = 0;
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arg += 3;
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}
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/* Commersial instructions. */
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if (strcmp (arg, "cis") == 0)
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pdp11_extension[PDP11_CIS] = yes;
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/* Call supervisor mode. */
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else if (strcmp (arg, "csm") == 0)
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pdp11_extension[PDP11_CSM] = yes;
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/* Extended instruction set. */
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else if (strcmp (arg, "eis") == 0)
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pdp11_extension[PDP11_EIS] = pdp11_extension[PDP11_LEIS] = yes;
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/* KEV11 floating-point. */
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else if (strcmp (arg, "fis") == 0
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|| strcmp (arg, "kev11") == 0
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|| strcmp (arg, "kev-11") == 0)
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pdp11_extension[PDP11_FIS] = yes;
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/* FP-11 floating-point. */
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else if (strcmp (arg, "fpp") == 0
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|| strcmp (arg, "fpu") == 0
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|| strcmp (arg, "fp11") == 0
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|| strcmp (arg, "fp-11") == 0
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|| strcmp (arg, "fpj11") == 0
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|| strcmp (arg, "fp-j11") == 0
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|| strcmp (arg, "fpj-11") == 0)
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pdp11_extension[PDP11_FPP] = yes;
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/* Limited extended insns. */
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else if (strcmp (arg, "limited-eis") == 0)
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{
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pdp11_extension[PDP11_LEIS] = yes;
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if (!pdp11_extension[PDP11_LEIS])
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pdp11_extension[PDP11_EIS] = 0;
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}
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/* Move from processor type. */
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else if (strcmp (arg, "mfpt") == 0)
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pdp11_extension[PDP11_MFPT] = yes;
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/* Multiprocessor insns: */
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else if (strncmp (arg, "mproc", 5) == 0
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/* TSTSET, WRTLCK */
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|| strncmp (arg, "multiproc", 9) == 0)
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pdp11_extension[PDP11_MPROC] = yes;
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/* Move from/to proc status. */
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else if (strcmp (arg, "mxps") == 0)
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pdp11_extension[PDP11_MXPS] = yes;
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/* Position-independent code. */
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else if (strcmp (arg, "pic") == 0)
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asm_option[ASM_OPT_PIC] = yes;
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/* Set priority level. */
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else if (strcmp (arg, "spl") == 0)
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pdp11_extension[PDP11_SPL] = yes;
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/* Microcode instructions: */
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else if (strcmp (arg, "ucode") == 0
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/* LDUB, MED, XFC */
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|| strcmp (arg, "microcode") == 0)
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pdp11_extension[PDP11_UCODE] = yes;
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else
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return 0;
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return 1;
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}
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static void
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init_defaults (void)
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{
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static int first = 1;
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if (first)
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{
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set_option ("all-extensions");
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set_option ("pic");
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first = 0;
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}
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}
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void
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md_begin (void)
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{
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int i;
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init_defaults ();
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insn_hash = hash_new ();
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if (insn_hash == NULL)
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as_fatal ("Virtual memory exhausted");
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for (i = 0; i < pdp11_num_opcodes; i++)
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hash_insert (insn_hash, pdp11_opcodes[i].name, (void *) (pdp11_opcodes + i));
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for (i = 0; i < pdp11_num_aliases; i++)
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hash_insert (insn_hash, pdp11_aliases[i].name, (void *) (pdp11_aliases + i));
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}
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void
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md_number_to_chars (char con[], valueT value, int nbytes)
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{
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/* On a PDP-11, 0x1234 is stored as "\x12\x34", and
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0x12345678 is stored as "\x56\x78\x12\x34". It's
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anyones guess what 0x123456 would be stored like. */
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switch (nbytes)
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{
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case 0:
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break;
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case 1:
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con[0] = value & 0xff;
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break;
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case 2:
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con[0] = value & 0xff;
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con[1] = (value >> 8) & 0xff;
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break;
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case 4:
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con[0] = (value >> 16) & 0xff;
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con[1] = (value >> 24) & 0xff;
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con[2] = value & 0xff;
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con[3] = (value >> 8) & 0xff;
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break;
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default:
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BAD_CASE (nbytes);
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}
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}
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/* Fix up some data or instructions after we find out the value of a symbol
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that they reference. Knows about order of bytes in address. */
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void
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md_apply_fix (fixS *fixP,
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valueT * valP,
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segT seg ATTRIBUTE_UNUSED)
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{
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valueT code;
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valueT mask;
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valueT val = * valP;
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char *buf;
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int shift;
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int size;
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buf = fixP->fx_where + fixP->fx_frag->fr_literal;
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size = fixP->fx_size;
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code = md_chars_to_number ((unsigned char *) buf, size);
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switch (fixP->fx_r_type)
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{
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case BFD_RELOC_16:
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case BFD_RELOC_16_PCREL:
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mask = 0xffff;
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shift = 0;
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break;
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case BFD_RELOC_PDP11_DISP_8_PCREL:
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mask = 0x00ff;
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shift = 1;
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break;
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case BFD_RELOC_PDP11_DISP_6_PCREL:
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mask = 0x003f;
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shift = 1;
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val = -val;
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break;
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default:
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BAD_CASE (fixP->fx_r_type);
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}
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if (fixP->fx_addsy != NULL)
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val += symbol_get_bfdsym (fixP->fx_addsy)->section->vma;
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/* *value += fixP->fx_addsy->bsym->section->vma; */
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code &= ~mask;
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code |= (val >> shift) & mask;
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number_to_chars_littleendian (buf, code, size);
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if (fixP->fx_addsy == NULL && fixP->fx_pcrel == 0)
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fixP->fx_done = 1;
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}
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long
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md_chars_to_number (con, nbytes)
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unsigned char con[]; /* Low order byte 1st. */
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int nbytes; /* Number of bytes in the input. */
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{
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/* On a PDP-11, 0x1234 is stored as "\x12\x34", and
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0x12345678 is stored as "\x56\x78\x12\x34". It's
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anyones guess what 0x123456 would be stored like. */
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switch (nbytes)
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{
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case 0:
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return 0;
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case 1:
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return con[0];
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case 2:
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return (con[1] << BITS_PER_CHAR) | con[0];
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case 4:
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return
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(((con[1] << BITS_PER_CHAR) | con[0]) << (2 * BITS_PER_CHAR))
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|((con[3] << BITS_PER_CHAR) | con[2]);
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default:
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BAD_CASE (nbytes);
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return 0;
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}
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}
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static char *
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skip_whitespace (char *str)
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{
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while (*str == ' ' || *str == '\t')
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str++;
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return str;
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}
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static char *
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find_whitespace (char *str)
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{
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while (*str != ' ' && *str != '\t' && *str != 0)
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str++;
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return str;
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}
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static char *
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parse_reg (char *str, struct pdp11_code *operand)
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{
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str = skip_whitespace (str);
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if (TOLOWER (*str) == 'r')
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{
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str++;
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switch (*str)
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{
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case '0': case '1': case '2': case '3':
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case '4': case '5': case '6': case '7':
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operand->code = *str - '0';
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str++;
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break;
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default:
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operand->error = "Bad register name";
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return str - 1;
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}
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}
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else if (strncmp (str, "sp", 2) == 0
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|| strncmp (str, "SP", 2) == 0)
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{
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operand->code = 6;
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str += 2;
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}
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else if (strncmp (str, "pc", 2) == 0
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|| strncmp (str, "PC", 2) == 0)
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{
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operand->code = 7;
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||
str += 2;
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||
}
|
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else
|
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{
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operand->error = "Bad register name";
|
||
return str;
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||
}
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||
|
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return str;
|
||
}
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|
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static char *
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parse_ac5 (char *str, struct pdp11_code *operand)
|
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{
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str = skip_whitespace (str);
|
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if (strncmp (str, "fr", 2) == 0
|
||
|| strncmp (str, "FR", 2) == 0
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||
|| strncmp (str, "ac", 2) == 0
|
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|| strncmp (str, "AC", 2) == 0)
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||
{
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str += 2;
|
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switch (*str)
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{
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||
case '0': case '1': case '2': case '3':
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case '4': case '5':
|
||
operand->code = *str - '0';
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||
str++;
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break;
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||
default:
|
||
operand->error = "Bad register name";
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return str - 2;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
operand->error = "Bad register name";
|
||
return str;
|
||
}
|
||
|
||
return str;
|
||
}
|
||
|
||
static char *
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parse_ac (char *str, struct pdp11_code *operand)
|
||
{
|
||
str = parse_ac5 (str, operand);
|
||
if (!operand->error && operand->code > 3)
|
||
{
|
||
operand->error = "Bad register name";
|
||
return str - 3;
|
||
}
|
||
|
||
return str;
|
||
}
|
||
|
||
static char *
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parse_expression (char *str, struct pdp11_code *operand)
|
||
{
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||
char *save_input_line_pointer;
|
||
segT seg;
|
||
|
||
save_input_line_pointer = input_line_pointer;
|
||
input_line_pointer = str;
|
||
seg = expression (&operand->reloc.exp);
|
||
if (seg == NULL)
|
||
{
|
||
input_line_pointer = save_input_line_pointer;
|
||
operand->error = "Error in expression";
|
||
return str;
|
||
}
|
||
|
||
str = input_line_pointer;
|
||
input_line_pointer = save_input_line_pointer;
|
||
|
||
operand->reloc.pc_rel = 0;
|
||
|
||
return str;
|
||
}
|
||
|
||
static char *
|
||
parse_op_no_deferred (char *str, struct pdp11_code *operand)
|
||
{
|
||
LITTLENUM_TYPE literal_float[2];
|
||
|
||
str = skip_whitespace (str);
|
||
|
||
switch (*str)
|
||
{
|
||
case '(': /* (rn) and (rn)+ */
|
||
str = parse_reg (str + 1, operand);
|
||
if (operand->error)
|
||
return str;
|
||
str = skip_whitespace (str);
|
||
if (*str != ')')
|
||
{
|
||
operand->error = "Missing ')'";
|
||
return str;
|
||
}
|
||
str++;
|
||
if (*str == '+')
|
||
{
|
||
operand->code |= 020;
|
||
str++;
|
||
}
|
||
else
|
||
{
|
||
operand->code |= 010;
|
||
}
|
||
break;
|
||
|
||
/* Immediate. */
|
||
case '#':
|
||
case '$':
|
||
str = parse_expression (str + 1, operand);
|
||
if (operand->error)
|
||
return str;
|
||
operand->additional = TRUE;
|
||
operand->word = operand->reloc.exp.X_add_number;
|
||
switch (operand->reloc.exp.X_op)
|
||
{
|
||
case O_constant:
|
||
break;
|
||
case O_symbol:
|
||
case O_add:
|
||
case O_subtract:
|
||
operand->reloc.type = BFD_RELOC_16;
|
||
operand->reloc.pc_rel = 0;
|
||
break;
|
||
case O_big:
|
||
if (operand->reloc.exp.X_add_number > 0)
|
||
{
|
||
operand->error = "Error in expression";
|
||
break;
|
||
}
|
||
/* It's a floating literal... */
|
||
know (operand->reloc.exp.X_add_number < 0);
|
||
flonum_gen2vax ('f', &generic_floating_point_number, literal_float);
|
||
operand->word = literal_float[0];
|
||
if (literal_float[1] != 0)
|
||
as_warn (_("Low order bits truncated in immediate float operand"));
|
||
break;
|
||
default:
|
||
operand->error = "Error in expression";
|
||
break;
|
||
}
|
||
operand->code = 027;
|
||
break;
|
||
|
||
/* label, d(rn), -(rn) */
|
||
default:
|
||
{
|
||
char *old = str;
|
||
|
||
if (strncmp (str, "-(", 2) == 0) /* -(rn) */
|
||
{
|
||
str = parse_reg (str + 2, operand);
|
||
if (operand->error)
|
||
return str;
|
||
str = skip_whitespace (str);
|
||
if (*str != ')')
|
||
{
|
||
operand->error = "Missing ')'";
|
||
return str;
|
||
}
|
||
operand->code |= 040;
|
||
str++;
|
||
break;
|
||
}
|
||
|
||
str = parse_expression (str, operand);
|
||
if (operand->error)
|
||
return str;
|
||
|
||
str = skip_whitespace (str);
|
||
|
||
if (*str != '(')
|
||
{
|
||
if (operand->reloc.exp.X_op != O_symbol)
|
||
{
|
||
operand->error = "Label expected";
|
||
return old;
|
||
}
|
||
operand->code = 067;
|
||
operand->additional = 1;
|
||
operand->word = 0;
|
||
operand->reloc.type = BFD_RELOC_16_PCREL;
|
||
operand->reloc.pc_rel = 1;
|
||
break;
|
||
}
|
||
|
||
/* d(rn) */
|
||
str++;
|
||
str = parse_reg (str, operand);
|
||
if (operand->error)
|
||
return str;
|
||
|
||
str = skip_whitespace (str);
|
||
|
||
if (*str != ')')
|
||
{
|
||
operand->error = "Missing ')'";
|
||
return str;
|
||
}
|
||
|
||
str++;
|
||
operand->additional = TRUE;
|
||
operand->code |= 060;
|
||
switch (operand->reloc.exp.X_op)
|
||
{
|
||
case O_symbol:
|
||
operand->word = 0;
|
||
operand->reloc.pc_rel = 1;
|
||
break;
|
||
case O_constant:
|
||
if ((operand->code & 7) == 7)
|
||
{
|
||
operand->reloc.pc_rel = 1;
|
||
operand->word = operand->reloc.exp.X_add_number;
|
||
}
|
||
else
|
||
operand->word = operand->reloc.exp.X_add_number;
|
||
|
||
break;
|
||
default:
|
||
BAD_CASE (operand->reloc.exp.X_op);
|
||
}
|
||
break;
|
||
}
|
||
}
|
||
|
||
return str;
|
||
}
|
||
|
||
static char *
|
||
parse_op_noreg (char *str, struct pdp11_code *operand)
|
||
{
|
||
str = skip_whitespace (str);
|
||
operand->error = NULL;
|
||
|
||
if (*str == '@' || *str == '*')
|
||
{
|
||
str = parse_op_no_deferred (str + 1, operand);
|
||
if (operand->error)
|
||
return str;
|
||
operand->code |= 010;
|
||
}
|
||
else
|
||
str = parse_op_no_deferred (str, operand);
|
||
|
||
return str;
|
||
}
|
||
|
||
static char *
|
||
parse_op (char *str, struct pdp11_code *operand)
|
||
{
|
||
str = skip_whitespace (str);
|
||
|
||
str = parse_reg (str, operand);
|
||
if (!operand->error)
|
||
return str;
|
||
|
||
operand->error = NULL;
|
||
parse_ac5 (str, operand);
|
||
if (!operand->error)
|
||
{
|
||
operand->error = "Float AC not legal as integer operand";
|
||
return str;
|
||
}
|
||
|
||
return parse_op_noreg (str, operand);
|
||
}
|
||
|
||
static char *
|
||
parse_fop (char *str, struct pdp11_code *operand)
|
||
{
|
||
str = skip_whitespace (str);
|
||
|
||
str = parse_ac5 (str, operand);
|
||
if (!operand->error)
|
||
return str;
|
||
|
||
operand->error = NULL;
|
||
parse_reg (str, operand);
|
||
if (!operand->error)
|
||
{
|
||
operand->error = "General register not legal as float operand";
|
||
return str;
|
||
}
|
||
|
||
return parse_op_noreg (str, operand);
|
||
}
|
||
|
||
static char *
|
||
parse_separator (char *str, int *error)
|
||
{
|
||
str = skip_whitespace (str);
|
||
*error = (*str != ',');
|
||
if (!*error)
|
||
str++;
|
||
return str;
|
||
}
|
||
|
||
void
|
||
md_assemble (char *instruction_string)
|
||
{
|
||
const struct pdp11_opcode *op;
|
||
struct pdp11_code insn, op1, op2;
|
||
int error;
|
||
int size;
|
||
char *err = NULL;
|
||
char *str;
|
||
char *p;
|
||
char c;
|
||
|
||
str = skip_whitespace (instruction_string);
|
||
p = find_whitespace (str);
|
||
if (p - str == 0)
|
||
{
|
||
as_bad ("No instruction found");
|
||
return;
|
||
}
|
||
|
||
c = *p;
|
||
*p = '\0';
|
||
op = (struct pdp11_opcode *)hash_find (insn_hash, str);
|
||
*p = c;
|
||
if (op == 0)
|
||
{
|
||
as_bad (_("Unknown instruction '%s'"), str);
|
||
return;
|
||
}
|
||
|
||
if (!pdp11_extension[op->extension])
|
||
{
|
||
as_warn ("Unsupported instruction set extension: %s", op->name);
|
||
return;
|
||
}
|
||
|
||
insn.error = NULL;
|
||
insn.code = op->opcode;
|
||
insn.reloc.type = BFD_RELOC_NONE;
|
||
op1.error = NULL;
|
||
op1.additional = FALSE;
|
||
op1.reloc.type = BFD_RELOC_NONE;
|
||
op2.error = NULL;
|
||
op2.additional = FALSE;
|
||
op2.reloc.type = BFD_RELOC_NONE;
|
||
|
||
str = p;
|
||
size = 2;
|
||
|
||
switch (op->type)
|
||
{
|
||
case PDP11_OPCODE_NO_OPS:
|
||
str = skip_whitespace (str);
|
||
if (*str == 0)
|
||
str = "";
|
||
break;
|
||
|
||
case PDP11_OPCODE_IMM3:
|
||
case PDP11_OPCODE_IMM6:
|
||
case PDP11_OPCODE_IMM8:
|
||
str = skip_whitespace (str);
|
||
if (*str == '#' || *str == '$')
|
||
str++;
|
||
str = parse_expression (str, &op1);
|
||
if (op1.error)
|
||
break;
|
||
if (op1.reloc.exp.X_op != O_constant || op1.reloc.type != BFD_RELOC_NONE)
|
||
{
|
||
op1.error = "operand is not an absolute constant";
|
||
break;
|
||
}
|
||
switch (op->type)
|
||
{
|
||
case PDP11_OPCODE_IMM3:
|
||
if (op1.reloc.exp.X_add_number & ~7)
|
||
{
|
||
op1.error = "3-bit immediate out of range";
|
||
break;
|
||
}
|
||
break;
|
||
case PDP11_OPCODE_IMM6:
|
||
if (op1.reloc.exp.X_add_number & ~0x3f)
|
||
{
|
||
op1.error = "6-bit immediate out of range";
|
||
break;
|
||
}
|
||
break;
|
||
case PDP11_OPCODE_IMM8:
|
||
if (op1.reloc.exp.X_add_number & ~0xff)
|
||
{
|
||
op1.error = "8-bit immediate out of range";
|
||
break;
|
||
}
|
||
break;
|
||
}
|
||
insn.code |= op1.reloc.exp.X_add_number;
|
||
break;
|
||
|
||
case PDP11_OPCODE_DISPL:
|
||
{
|
||
char *new;
|
||
new = parse_expression (str, &op1);
|
||
op1.code = 0;
|
||
op1.reloc.pc_rel = 1;
|
||
op1.reloc.type = BFD_RELOC_PDP11_DISP_8_PCREL;
|
||
if (op1.reloc.exp.X_op != O_symbol)
|
||
{
|
||
op1.error = "Symbol expected";
|
||
break;
|
||
}
|
||
if (op1.code & ~0xff)
|
||
{
|
||
err = "8-bit displacement out of range";
|
||
break;
|
||
}
|
||
str = new;
|
||
insn.code |= op1.code;
|
||
insn.reloc = op1.reloc;
|
||
}
|
||
break;
|
||
|
||
case PDP11_OPCODE_REG:
|
||
str = parse_reg (str, &op1);
|
||
if (op1.error)
|
||
break;
|
||
insn.code |= op1.code;
|
||
break;
|
||
|
||
case PDP11_OPCODE_OP:
|
||
str = parse_op (str, &op1);
|
||
if (op1.error)
|
||
break;
|
||
insn.code |= op1.code;
|
||
if (op1.additional)
|
||
size += 2;
|
||
break;
|
||
|
||
case PDP11_OPCODE_FOP:
|
||
str = parse_fop (str, &op1);
|
||
if (op1.error)
|
||
break;
|
||
insn.code |= op1.code;
|
||
if (op1.additional)
|
||
size += 2;
|
||
break;
|
||
|
||
case PDP11_OPCODE_REG_OP:
|
||
str = parse_reg (str, &op2);
|
||
if (op2.error)
|
||
break;
|
||
insn.code |= op2.code << 6;
|
||
str = parse_separator (str, &error);
|
||
if (error)
|
||
{
|
||
op2.error = "Missing ','";
|
||
break;
|
||
}
|
||
str = parse_op (str, &op1);
|
||
if (op1.error)
|
||
break;
|
||
insn.code |= op1.code;
|
||
if (op1.additional)
|
||
size += 2;
|
||
break;
|
||
|
||
case PDP11_OPCODE_REG_OP_REV:
|
||
str = parse_op (str, &op1);
|
||
if (op1.error)
|
||
break;
|
||
insn.code |= op1.code;
|
||
if (op1.additional)
|
||
size += 2;
|
||
str = parse_separator (str, &error);
|
||
if (error)
|
||
{
|
||
op2.error = "Missing ','";
|
||
break;
|
||
}
|
||
str = parse_reg (str, &op2);
|
||
if (op2.error)
|
||
break;
|
||
insn.code |= op2.code << 6;
|
||
break;
|
||
|
||
case PDP11_OPCODE_AC_FOP:
|
||
str = parse_ac (str, &op2);
|
||
if (op2.error)
|
||
break;
|
||
insn.code |= op2.code << 6;
|
||
str = parse_separator (str, &error);
|
||
if (error)
|
||
{
|
||
op1.error = "Missing ','";
|
||
break;
|
||
}
|
||
str = parse_fop (str, &op1);
|
||
if (op1.error)
|
||
break;
|
||
insn.code |= op1.code;
|
||
if (op1.additional)
|
||
size += 2;
|
||
break;
|
||
|
||
case PDP11_OPCODE_FOP_AC:
|
||
str = parse_fop (str, &op1);
|
||
if (op1.error)
|
||
break;
|
||
insn.code |= op1.code;
|
||
if (op1.additional)
|
||
size += 2;
|
||
str = parse_separator (str, &error);
|
||
if (error)
|
||
{
|
||
op1.error = "Missing ','";
|
||
break;
|
||
}
|
||
str = parse_ac (str, &op2);
|
||
if (op2.error)
|
||
break;
|
||
insn.code |= op2.code << 6;
|
||
break;
|
||
|
||
case PDP11_OPCODE_AC_OP:
|
||
str = parse_ac (str, &op2);
|
||
if (op2.error)
|
||
break;
|
||
insn.code |= op2.code << 6;
|
||
str = parse_separator (str, &error);
|
||
if (error)
|
||
{
|
||
op1.error = "Missing ','";
|
||
break;
|
||
}
|
||
str = parse_op (str, &op1);
|
||
if (op1.error)
|
||
break;
|
||
insn.code |= op1.code;
|
||
if (op1.additional)
|
||
size += 2;
|
||
break;
|
||
|
||
case PDP11_OPCODE_OP_AC:
|
||
str = parse_op (str, &op1);
|
||
if (op1.error)
|
||
break;
|
||
insn.code |= op1.code;
|
||
if (op1.additional)
|
||
size += 2;
|
||
str = parse_separator (str, &error);
|
||
if (error)
|
||
{
|
||
op1.error = "Missing ','";
|
||
break;
|
||
}
|
||
str = parse_ac (str, &op2);
|
||
if (op2.error)
|
||
break;
|
||
insn.code |= op2.code << 6;
|
||
break;
|
||
|
||
case PDP11_OPCODE_OP_OP:
|
||
str = parse_op (str, &op1);
|
||
if (op1.error)
|
||
break;
|
||
insn.code |= op1.code << 6;
|
||
if (op1.additional)
|
||
size += 2;
|
||
str = parse_separator (str, &error);
|
||
if (error)
|
||
{
|
||
op2.error = "Missing ','";
|
||
break;
|
||
}
|
||
str = parse_op (str, &op2);
|
||
if (op2.error)
|
||
break;
|
||
insn.code |= op2.code;
|
||
if (op2.additional)
|
||
size += 2;
|
||
break;
|
||
|
||
case PDP11_OPCODE_REG_DISPL:
|
||
{
|
||
char *new;
|
||
str = parse_reg (str, &op2);
|
||
if (op2.error)
|
||
break;
|
||
insn.code |= op2.code << 6;
|
||
str = parse_separator (str, &error);
|
||
if (error)
|
||
{
|
||
op1.error = "Missing ','";
|
||
break;
|
||
}
|
||
new = parse_expression (str, &op1);
|
||
op1.code = 0;
|
||
op1.reloc.pc_rel = 1;
|
||
op1.reloc.type = BFD_RELOC_PDP11_DISP_6_PCREL;
|
||
if (op1.reloc.exp.X_op != O_symbol)
|
||
{
|
||
op1.error = "Symbol expected";
|
||
break;
|
||
}
|
||
if (op1.code & ~0x3f)
|
||
{
|
||
err = "6-bit displacement out of range";
|
||
break;
|
||
}
|
||
str = new;
|
||
insn.code |= op1.code;
|
||
insn.reloc = op1.reloc;
|
||
}
|
||
break;
|
||
|
||
default:
|
||
BAD_CASE (op->type);
|
||
}
|
||
|
||
if (op1.error)
|
||
err = op1.error;
|
||
else if (op2.error)
|
||
err = op2.error;
|
||
else
|
||
{
|
||
str = skip_whitespace (str);
|
||
if (*str)
|
||
err = "Too many operands";
|
||
}
|
||
|
||
{
|
||
char *to = NULL;
|
||
|
||
if (err)
|
||
{
|
||
as_bad (err);
|
||
return;
|
||
}
|
||
|
||
to = frag_more (size);
|
||
|
||
md_number_to_chars (to, insn.code, 2);
|
||
if (insn.reloc.type != BFD_RELOC_NONE)
|
||
fix_new_exp (frag_now, to - frag_now->fr_literal, 2,
|
||
&insn.reloc.exp, insn.reloc.pc_rel, insn.reloc.type);
|
||
to += 2;
|
||
|
||
if (op1.additional)
|
||
{
|
||
md_number_to_chars (to, op1.word, 2);
|
||
if (op1.reloc.type != BFD_RELOC_NONE)
|
||
fix_new_exp (frag_now, to - frag_now->fr_literal, 2,
|
||
&op1.reloc.exp, op1.reloc.pc_rel, op1.reloc.type);
|
||
to += 2;
|
||
}
|
||
|
||
if (op2.additional)
|
||
{
|
||
md_number_to_chars (to, op2.word, 2);
|
||
if (op2.reloc.type != BFD_RELOC_NONE)
|
||
fix_new_exp (frag_now, to - frag_now->fr_literal, 2,
|
||
&op2.reloc.exp, op2.reloc.pc_rel, op2.reloc.type);
|
||
}
|
||
}
|
||
}
|
||
|
||
int
|
||
md_estimate_size_before_relax (fragS *fragP ATTRIBUTE_UNUSED,
|
||
segT segment ATTRIBUTE_UNUSED)
|
||
{
|
||
return 0;
|
||
}
|
||
|
||
void
|
||
md_convert_frag (bfd *headers ATTRIBUTE_UNUSED,
|
||
segT seg ATTRIBUTE_UNUSED,
|
||
fragS *fragP ATTRIBUTE_UNUSED)
|
||
{
|
||
}
|
||
|
||
int md_short_jump_size = 2;
|
||
int md_long_jump_size = 4;
|
||
|
||
void
|
||
md_create_short_jump (char *ptr ATTRIBUTE_UNUSED,
|
||
addressT from_addr ATTRIBUTE_UNUSED,
|
||
addressT to_addr ATTRIBUTE_UNUSED,
|
||
fragS *frag ATTRIBUTE_UNUSED,
|
||
symbolS *to_symbol ATTRIBUTE_UNUSED)
|
||
{
|
||
}
|
||
|
||
void
|
||
md_create_long_jump (char *ptr ATTRIBUTE_UNUSED,
|
||
addressT from_addr ATTRIBUTE_UNUSED,
|
||
addressT to_addr ATTRIBUTE_UNUSED,
|
||
fragS *frag ATTRIBUTE_UNUSED,
|
||
symbolS *to_symbol ATTRIBUTE_UNUSED)
|
||
{
|
||
}
|
||
|
||
static int
|
||
set_cpu_model (char *arg)
|
||
{
|
||
char buf[4];
|
||
char *model = buf;
|
||
|
||
if (arg[0] == 'k')
|
||
arg++;
|
||
|
||
*model++ = *arg++;
|
||
|
||
if (strchr ("abdx", model[-1]) == NULL)
|
||
return 0;
|
||
|
||
if (model[-1] == 'd')
|
||
{
|
||
if (arg[0] == 'f' || arg[0] == 'j')
|
||
model[-1] = *arg++;
|
||
}
|
||
else if (model[-1] == 'x')
|
||
{
|
||
if (arg[0] == 't')
|
||
model[-1] = *arg++;
|
||
}
|
||
|
||
if (arg[0] == '-')
|
||
arg++;
|
||
|
||
if (strncmp (arg, "11", 2) != 0)
|
||
return 0;
|
||
arg += 2;
|
||
|
||
if (arg[0] == '-')
|
||
{
|
||
if (*++arg == 0)
|
||
return 0;
|
||
}
|
||
|
||
/* Allow up to two revision letters. */
|
||
if (arg[0] != 0)
|
||
*model++ = *arg++;
|
||
if (arg[0] != 0)
|
||
*model++ = *arg++;
|
||
|
||
*model++ = 0;
|
||
|
||
set_option ("no-extensions");
|
||
|
||
/* KA11 (11/15/20). */
|
||
if (strncmp (buf, "a", 1) == 0)
|
||
return 1; /* No extensions. */
|
||
|
||
/* KB11 (11/45/50/55/70). */
|
||
else if (strncmp (buf, "b", 1) == 0)
|
||
return set_option ("eis") && set_option ("spl");
|
||
|
||
/* KD11-A (11/35/40). */
|
||
else if (strncmp (buf, "da", 2) == 0)
|
||
return set_option ("limited-eis");
|
||
|
||
/* KD11-B (11/05/10). */
|
||
else if (strncmp (buf, "db", 2) == 0
|
||
/* KD11-D (11/04). */
|
||
|| strncmp (buf, "dd", 2) == 0)
|
||
return 1; /* no extensions */
|
||
|
||
/* KD11-E (11/34). */
|
||
else if (strncmp (buf, "de", 2) == 0)
|
||
return set_option ("eis") && set_option ("mxps");
|
||
|
||
/* KD11-F (11/03). */
|
||
else if (strncmp (buf, "df", 2) == 0
|
||
/* KD11-H (11/03). */
|
||
|| strncmp (buf, "dh", 2) == 0
|
||
/* KD11-Q (11/03). */
|
||
|| strncmp (buf, "dq", 2) == 0)
|
||
return set_option ("limited-eis") && set_option ("mxps");
|
||
|
||
/* KD11-K (11/60). */
|
||
else if (strncmp (buf, "dk", 2) == 0)
|
||
return set_option ("eis")
|
||
&& set_option ("mxps")
|
||
&& set_option ("ucode");
|
||
|
||
/* KD11-Z (11/44). */
|
||
else if (strncmp (buf, "dz", 2) == 0)
|
||
return set_option ("csm")
|
||
&& set_option ("eis")
|
||
&& set_option ("mfpt")
|
||
&& set_option ("mxps")
|
||
&& set_option ("spl");
|
||
|
||
/* F11 (11/23/24). */
|
||
else if (strncmp (buf, "f", 1) == 0)
|
||
return set_option ("eis")
|
||
&& set_option ("mfpt")
|
||
&& set_option ("mxps");
|
||
|
||
/* J11 (11/53/73/83/84/93/94). */
|
||
else if (strncmp (buf, "j", 1) == 0)
|
||
return set_option ("csm")
|
||
&& set_option ("eis")
|
||
&& set_option ("mfpt")
|
||
&& set_option ("multiproc")
|
||
&& set_option ("mxps")
|
||
&& set_option ("spl");
|
||
|
||
/* T11 (11/21). */
|
||
else if (strncmp (buf, "t", 1) == 0)
|
||
return set_option ("limited-eis")
|
||
&& set_option ("mxps");
|
||
|
||
else
|
||
return 0;
|
||
}
|
||
|
||
static int
|
||
set_machine_model (char *arg)
|
||
{
|
||
if (strncmp (arg, "pdp-11/", 7) != 0
|
||
&& strncmp (arg, "pdp11/", 6) != 0
|
||
&& strncmp (arg, "11/", 3) != 0)
|
||
return 0;
|
||
|
||
if (strncmp (arg, "pdp", 3) == 0)
|
||
arg += 3;
|
||
if (arg[0] == '-')
|
||
arg++;
|
||
if (strncmp (arg, "11/", 3) == 0)
|
||
arg += 3;
|
||
|
||
if (strcmp (arg, "03") == 0)
|
||
return set_cpu_model ("kd11f");
|
||
|
||
else if (strcmp (arg, "04") == 0)
|
||
return set_cpu_model ("kd11d");
|
||
|
||
else if (strcmp (arg, "05") == 0
|
||
|| strcmp (arg, "10") == 0)
|
||
return set_cpu_model ("kd11b");
|
||
|
||
else if (strcmp (arg, "15") == 0
|
||
|| strcmp (arg, "20") == 0)
|
||
return set_cpu_model ("ka11");
|
||
|
||
else if (strcmp (arg, "21") == 0)
|
||
return set_cpu_model ("t11");
|
||
|
||
else if (strcmp (arg, "23") == 0
|
||
|| strcmp (arg, "24") == 0)
|
||
return set_cpu_model ("f11");
|
||
|
||
else if (strcmp (arg, "34") == 0
|
||
|| strcmp (arg, "34a") == 0)
|
||
return set_cpu_model ("kd11e");
|
||
|
||
else if (strcmp (arg, "35") == 0
|
||
|| strcmp (arg, "40") == 0)
|
||
return set_cpu_model ("kd11da");
|
||
|
||
else if (strcmp (arg, "44") == 0)
|
||
return set_cpu_model ("kd11dz");
|
||
|
||
else if (strcmp (arg, "45") == 0
|
||
|| strcmp (arg, "50") == 0
|
||
|| strcmp (arg, "55") == 0
|
||
|| strcmp (arg, "70") == 0)
|
||
return set_cpu_model ("kb11");
|
||
|
||
else if (strcmp (arg, "60") == 0)
|
||
return set_cpu_model ("kd11k");
|
||
|
||
else if (strcmp (arg, "53") == 0
|
||
|| strcmp (arg, "73") == 0
|
||
|| strcmp (arg, "83") == 0
|
||
|| strcmp (arg, "84") == 0
|
||
|| strcmp (arg, "93") == 0
|
||
|| strcmp (arg, "94") == 0)
|
||
return set_cpu_model ("j11")
|
||
&& set_option ("fpp");
|
||
|
||
else
|
||
return 0;
|
||
}
|
||
|
||
const char *md_shortopts = "m:";
|
||
|
||
struct option md_longopts[] =
|
||
{
|
||
#define OPTION_CPU 257
|
||
{ "cpu", required_argument, NULL, OPTION_CPU },
|
||
#define OPTION_MACHINE 258
|
||
{ "machine", required_argument, NULL, OPTION_MACHINE },
|
||
#define OPTION_PIC 259
|
||
{ "pic", no_argument, NULL, OPTION_PIC },
|
||
{ NULL, no_argument, NULL, 0 }
|
||
};
|
||
|
||
size_t md_longopts_size = sizeof (md_longopts);
|
||
|
||
/* Invocation line includes a switch not recognized by the base assembler.
|
||
See if it's a processor-specific option. */
|
||
|
||
int
|
||
md_parse_option (int c, char *arg)
|
||
{
|
||
init_defaults ();
|
||
|
||
switch (c)
|
||
{
|
||
case 'm':
|
||
if (set_option (arg))
|
||
return 1;
|
||
if (set_cpu_model (arg))
|
||
return 1;
|
||
if (set_machine_model (arg))
|
||
return 1;
|
||
break;
|
||
|
||
case OPTION_CPU:
|
||
if (set_cpu_model (arg))
|
||
return 1;
|
||
break;
|
||
|
||
case OPTION_MACHINE:
|
||
if (set_machine_model (arg))
|
||
return 1;
|
||
break;
|
||
|
||
case OPTION_PIC:
|
||
if (set_option ("pic"))
|
||
return 1;
|
||
break;
|
||
|
||
default:
|
||
break;
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
|
||
void
|
||
md_show_usage (FILE *stream)
|
||
{
|
||
fprintf (stream, "\
|
||
\n\
|
||
PDP-11 instruction set extentions:\n\
|
||
\n\
|
||
-m(no-)cis allow (disallow) commersial instruction set\n\
|
||
-m(no-)csm allow (disallow) CSM instruction\n\
|
||
-m(no-)eis allow (disallow) full extended instruction set\n\
|
||
-m(no-)fis allow (disallow) KEV11 floating-point instructions\n\
|
||
-m(no-)fpp allow (disallow) FP-11 floating-point instructions\n\
|
||
-m(no-)fpu allow (disallow) FP-11 floating-point instructions\n\
|
||
-m(no-)limited-eis allow (disallow) limited extended instruction set\n\
|
||
-m(no-)mfpt allow (disallow) processor type instruction\n\
|
||
-m(no-)multiproc allow (disallow) multiprocessor instructions\n\
|
||
-m(no-)mxps allow (disallow) processor status instructions\n\
|
||
-m(no-)spl allow (disallow) SPL instruction\n\
|
||
-m(no-)ucode allow (disallow) microcode instructions\n\
|
||
-mall-extensions allow all instruction set extensions\n\
|
||
(this is the default)\n\
|
||
-mno-extentions disallow all instruction set extensions\n\
|
||
-pic generate position-indepenent code\n\
|
||
\n\
|
||
PDP-11 CPU model options:\n\
|
||
\n\
|
||
-mka11* KA11 CPU. base line instruction set only\n\
|
||
-mkb11* KB11 CPU. enable full EIS and SPL\n\
|
||
-mkd11a* KD11-A CPU. enable limited EIS\n\
|
||
-mkd11b* KD11-B CPU. base line instruction set only\n\
|
||
-mkd11d* KD11-D CPU. base line instruction set only\n\
|
||
-mkd11e* KD11-E CPU. enable full EIS, MTPS, and MFPS\n\
|
||
-mkd11f* KD11-F CPU. enable limited EIS, MTPS, and MFPS\n\
|
||
-mkd11h* KD11-H CPU. enable limited EIS, MTPS, and MFPS\n\
|
||
-mkd11q* KD11-Q CPU. enable limited EIS, MTPS, and MFPS\n\
|
||
-mkd11k* KD11-K CPU. enable full EIS, MTPS, MFPS, LDUB, MED,\n\
|
||
XFC, and MFPT\n\
|
||
-mkd11z* KD11-Z CPU. enable full EIS, MTPS, MFPS, MFPT, SPL,\n\
|
||
and CSM\n\
|
||
-mf11* F11 CPU. enable full EIS, MFPS, MTPS, and MFPT\n\
|
||
-mj11* J11 CPU. enable full EIS, MTPS, MFPS, MFPT, SPL,\n\
|
||
CSM, TSTSET, and WRTLCK\n\
|
||
-mt11* T11 CPU. enable limited EIS, MTPS, and MFPS\n\
|
||
\n\
|
||
PDP-11 machine model options:\n\
|
||
\n\
|
||
-m11/03 same as -mkd11f\n\
|
||
-m11/04 same as -mkd11d\n\
|
||
-m11/05 same as -mkd11b\n\
|
||
-m11/10 same as -mkd11b\n\
|
||
-m11/15 same as -mka11\n\
|
||
-m11/20 same as -mka11\n\
|
||
-m11/21 same as -mt11\n\
|
||
-m11/23 same as -mf11\n\
|
||
-m11/24 same as -mf11\n\
|
||
-m11/34 same as -mkd11e\n\
|
||
-m11/34a same as -mkd11e -mfpp\n\
|
||
-m11/35 same as -mkd11a\n\
|
||
-m11/40 same as -mkd11a\n\
|
||
-m11/44 same as -mkd11z\n\
|
||
-m11/45 same as -mkb11\n\
|
||
-m11/50 same as -mkb11\n\
|
||
-m11/53 same as -mj11\n\
|
||
-m11/55 same as -mkb11\n\
|
||
-m11/60 same as -mkd11k\n\
|
||
-m11/70 same as -mkb11\n\
|
||
-m11/73 same as -mj11\n\
|
||
-m11/83 same as -mj11\n\
|
||
-m11/84 same as -mj11\n\
|
||
-m11/93 same as -mj11\n\
|
||
-m11/94 same as -mj11\n\
|
||
");
|
||
}
|
||
|
||
symbolS *
|
||
md_undefined_symbol (char *name ATTRIBUTE_UNUSED)
|
||
{
|
||
return 0;
|
||
}
|
||
|
||
valueT
|
||
md_section_align (segT segment ATTRIBUTE_UNUSED,
|
||
valueT size)
|
||
{
|
||
return (size + 1) & ~1;
|
||
}
|
||
|
||
long
|
||
md_pcrel_from (fixS *fixP)
|
||
{
|
||
return fixP->fx_frag->fr_address + fixP->fx_where + fixP->fx_size;
|
||
}
|
||
|
||
/* Translate internal representation of relocation info to BFD target
|
||
format. */
|
||
|
||
arelent *
|
||
tc_gen_reloc (asection *section ATTRIBUTE_UNUSED,
|
||
fixS *fixp)
|
||
{
|
||
arelent *reloc;
|
||
bfd_reloc_code_real_type code;
|
||
|
||
reloc = xmalloc (sizeof (* reloc));
|
||
|
||
reloc->sym_ptr_ptr = xmalloc (sizeof (asymbol *));
|
||
*reloc->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_addsy);
|
||
reloc->address = fixp->fx_frag->fr_address + fixp->fx_where;
|
||
|
||
/* This is taken account for in md_apply_fix(). */
|
||
reloc->addend = -symbol_get_bfdsym (fixp->fx_addsy)->section->vma;
|
||
|
||
switch (fixp->fx_r_type)
|
||
{
|
||
case BFD_RELOC_16:
|
||
if (fixp->fx_pcrel)
|
||
code = BFD_RELOC_16_PCREL;
|
||
else
|
||
code = BFD_RELOC_16;
|
||
break;
|
||
|
||
case BFD_RELOC_16_PCREL:
|
||
code = BFD_RELOC_16_PCREL;
|
||
break;
|
||
|
||
default:
|
||
BAD_CASE (fixp->fx_r_type);
|
||
return NULL;
|
||
}
|
||
|
||
reloc->howto = bfd_reloc_type_lookup (stdoutput, code);
|
||
|
||
if (reloc->howto == NULL)
|
||
{
|
||
as_bad_where (fixp->fx_file, fixp->fx_line,
|
||
"Can not represent %s relocation in this object file format",
|
||
bfd_get_reloc_code_name (code));
|
||
return NULL;
|
||
}
|
||
|
||
return reloc;
|
||
}
|
||
|
||
void
|
||
pseudo_bss (int c ATTRIBUTE_UNUSED)
|
||
{
|
||
int temp;
|
||
|
||
temp = get_absolute_expression ();
|
||
subseg_set (bss_section, temp);
|
||
demand_empty_rest_of_line ();
|
||
}
|
||
|
||
void
|
||
pseudo_even (int c ATTRIBUTE_UNUSED)
|
||
{
|
||
int alignment = 1; /* 2^1 */
|
||
frag_align (alignment, 0, 1);
|
||
record_alignment (now_seg, alignment);
|
||
}
|
||
|
||
char *
|
||
md_atof (int type, char * litP, int * sizeP)
|
||
{
|
||
return vax_md_atof (type, litP, sizeP);
|
||
}
|