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Projet_SETI_RISC-V/riscv-gnu-toolchain/binutils/gas/config/tc-pdp11.c

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projet
2023-03-06 14:48:14 +01:00
/* tc-pdp11.c - pdp11-specific -
Copyright (C) 2001-2022 Free Software Foundation, Inc.
This file is part of GAS, the GNU Assembler.
GAS is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3, or (at your option)
any later version.
GAS is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with GAS; see the file COPYING. If not, write to
the Free Software Foundation, 51 Franklin Street - Fifth Floor,
Boston, MA 02110-1301, USA. */
#include "as.h"
#include "safe-ctype.h"
#include "opcode/pdp11.h"
extern int flonum_gen2vax (int, FLONUM_TYPE * f, LITTLENUM_TYPE *);
/* A representation for PDP-11 machine code. */
struct pdp11_code
{
const char *error;
int code;
int additional; /* Is there an additional word? */
int word; /* Additional word, if any. */
struct
{
bfd_reloc_code_real_type type;
expressionS exp;
int pc_rel;
} reloc;
};
/* Instruction set extensions.
If you change this from an array to something else, please update
the "PDP-11 instruction set extensions" comment in pdp11.h. */
int pdp11_extension[PDP11_EXT_NUM];
/* Assembly options. */
#define ASM_OPT_PIC 1
#define ASM_OPT_NUM 2
int asm_option[ASM_OPT_NUM];
/* These chars start a comment anywhere in a source file (except inside
another comment. */
const char comment_chars[] = "#/";
/* These chars only start a comment at the beginning of a line. */
const char line_comment_chars[] = "#/";
const char line_separator_chars[] = ";";
/* Chars that can be used to separate mant from exp in floating point nums. */
const char EXP_CHARS[] = "eE";
/* Chars that mean this number is a floating point constant. */
/* as in 0f123.456. */
/* or 0H1.234E-12 (see exp chars above). */
const char FLT_CHARS[] = "dDfF";
void pseudo_even (int);
void pseudo_bss (int);
const pseudo_typeS md_pseudo_table[] =
{
{ "bss", pseudo_bss, 0 },
{ "even", pseudo_even, 0 },
{ 0, 0, 0 },
};
static htab_t insn_hash = NULL;
static int
set_option (const char *arg)
{
int yes = 1;
if (strcmp (arg, "all-extensions") == 0
|| strcmp (arg, "all") == 0)
{
memset (pdp11_extension, ~0, sizeof pdp11_extension);
pdp11_extension[PDP11_NONE] = 0;
return 1;
}
else if (strcmp (arg, "no-extensions") == 0)
{
memset (pdp11_extension, 0, sizeof pdp11_extension);
pdp11_extension[PDP11_BASIC] = 1;
return 1;
}
if (startswith (arg, "no-"))
{
yes = 0;
arg += 3;
}
/* Commercial instructions. */
if (strcmp (arg, "cis") == 0)
pdp11_extension[PDP11_CIS] = yes;
/* Call supervisor mode. */
else if (strcmp (arg, "csm") == 0)
pdp11_extension[PDP11_CSM] = yes;
/* Extended instruction set. */
else if (strcmp (arg, "eis") == 0)
pdp11_extension[PDP11_EIS] = pdp11_extension[PDP11_LEIS] = yes;
/* KEV11 floating-point. */
else if (strcmp (arg, "fis") == 0
|| strcmp (arg, "kev11") == 0
|| strcmp (arg, "kev-11") == 0)
pdp11_extension[PDP11_FIS] = yes;
/* FP-11 floating-point. */
else if (strcmp (arg, "fpp") == 0
|| strcmp (arg, "fpu") == 0
|| strcmp (arg, "fp11") == 0
|| strcmp (arg, "fp-11") == 0
|| strcmp (arg, "fpj11") == 0
|| strcmp (arg, "fp-j11") == 0
|| strcmp (arg, "fpj-11") == 0)
pdp11_extension[PDP11_FPP] = yes;
/* Limited extended insns. */
else if (strcmp (arg, "limited-eis") == 0)
{
pdp11_extension[PDP11_LEIS] = yes;
if (!pdp11_extension[PDP11_LEIS])
pdp11_extension[PDP11_EIS] = 0;
}
/* Move from processor type. */
else if (strcmp (arg, "mfpt") == 0)
pdp11_extension[PDP11_MFPT] = yes;
/* Multiprocessor insns: */
else if (startswith (arg, "mproc")
/* TSTSET, WRTLCK */
|| startswith (arg, "multiproc"))
pdp11_extension[PDP11_MPROC] = yes;
/* Move from/to proc status. */
else if (strcmp (arg, "mxps") == 0)
pdp11_extension[PDP11_MXPS] = yes;
/* Position-independent code. */
else if (strcmp (arg, "pic") == 0)
asm_option[ASM_OPT_PIC] = yes;
/* Set priority level. */
else if (strcmp (arg, "spl") == 0)
pdp11_extension[PDP11_SPL] = yes;
/* Microcode instructions: */
else if (strcmp (arg, "ucode") == 0
/* LDUB, MED, XFC */
|| strcmp (arg, "microcode") == 0)
pdp11_extension[PDP11_UCODE] = yes;
else
return 0;
return 1;
}
static void
init_defaults (void)
{
static int first = 1;
if (first)
{
set_option ("all-extensions");
set_option ("pic");
first = 0;
}
}
void
md_begin (void)
{
int i;
init_defaults ();
insn_hash = str_htab_create ();
for (i = 0; i < pdp11_num_opcodes; i++)
str_hash_insert (insn_hash, pdp11_opcodes[i].name, pdp11_opcodes + i, 0);
for (i = 0; i < pdp11_num_aliases; i++)
str_hash_insert (insn_hash, pdp11_aliases[i].name, pdp11_aliases + i, 0);
}
void
md_number_to_chars (char con[], valueT value, int nbytes)
{
/* On a PDP-11, 0x1234 is stored as "\x12\x34", and
0x12345678 is stored as "\x56\x78\x12\x34". It's
anyone's guess what 0x123456 would be stored like. */
switch (nbytes)
{
case 0:
break;
case 1:
con[0] = value & 0xff;
break;
case 2:
con[0] = value & 0xff;
con[1] = (value >> 8) & 0xff;
break;
case 4:
con[0] = (value >> 16) & 0xff;
con[1] = (value >> 24) & 0xff;
con[2] = value & 0xff;
con[3] = (value >> 8) & 0xff;
break;
#ifdef BFD64
case 8:
con[0] = (value >> 48) & 0xff;
con[1] = (value >> 56) & 0xff;
con[2] = (value >> 32) & 0xff;
con[3] = (value >> 40) & 0xff;
con[4] = (value >> 16) & 0xff;
con[5] = (value >> 24) & 0xff;
con[6] = value & 0xff;
con[7] = (value >> 8) & 0xff;
break;
#endif
default:
BAD_CASE (nbytes);
}
}
/* Fix up some data or instructions after we find out the value of a symbol
that they reference. Knows about order of bytes in address. */
void
md_apply_fix (fixS *fixP,
valueT * valP,
segT seg ATTRIBUTE_UNUSED)
{
valueT code;
valueT mask;
valueT val = * valP;
char *buf;
int shift;
int size;
buf = fixP->fx_where + fixP->fx_frag->fr_literal;
size = fixP->fx_size;
code = md_chars_to_number ((unsigned char *) buf, size);
switch (fixP->fx_r_type)
{
case BFD_RELOC_8:
mask = 0xff;
shift = 0;
break;
case BFD_RELOC_16:
case BFD_RELOC_16_PCREL:
mask = 0xffff;
shift = 0;
break;
case BFD_RELOC_32:
mask = 0xffffffff;
shift = 0;
break;
case BFD_RELOC_PDP11_DISP_8_PCREL:
mask = 0x00ff;
shift = 1;
break;
case BFD_RELOC_PDP11_DISP_6_PCREL:
mask = 0x003f;
shift = 1;
val = -val;
break;
default:
BAD_CASE (fixP->fx_r_type);
}
if (fixP->fx_addsy != NULL)
val += symbol_get_bfdsym (fixP->fx_addsy)->section->vma;
/* *value += fixP->fx_addsy->bsym->section->vma; */
code &= ~mask;
code |= (val >> shift) & mask;
number_to_chars_littleendian (buf, code, size);
if (fixP->fx_addsy == NULL && fixP->fx_pcrel == 0)
fixP->fx_done = 1;
}
long
md_chars_to_number (unsigned char *con, int nbytes)
{
/* On a PDP-11, 0x1234 is stored as "\x12\x34", and
0x12345678 is stored as "\x56\x78\x12\x34". It's
anyone's guess what 0x123456 would be stored like. */
switch (nbytes)
{
case 0:
return 0;
case 1:
return con[0];
case 2:
return (con[1] << BITS_PER_CHAR) | con[0];
case 4:
return
(((con[1] << BITS_PER_CHAR) | con[0]) << (2 * BITS_PER_CHAR))
|((con[3] << BITS_PER_CHAR) | con[2]);
default:
BAD_CASE (nbytes);
return 0;
}
}
static char *
skip_whitespace (char *str)
{
while (*str == ' ' || *str == '\t')
str++;
return str;
}
static char *
find_whitespace (char *str)
{
while (*str != ' ' && *str != '\t' && *str != 0)
str++;
return str;
}
static char *
parse_reg (char *str, struct pdp11_code *operand)
{
str = skip_whitespace (str);
if (TOLOWER (*str) == 'r')
{
str++;
switch (*str)
{
case '0': case '1': case '2': case '3':
case '4': case '5': case '6': case '7':
operand->code = *str - '0';
str++;
break;
default:
operand->error = _("Bad register name");
return str - 1;
}
}
else if (startswith (str, "sp")
|| startswith (str, "SP"))
{
operand->code = 6;
str += 2;
}
else if (startswith (str, "pc")
|| startswith (str, "PC"))
{
operand->code = 7;
str += 2;
}
else
{
operand->error = _("Bad register name");
return str;
}
if (ISALNUM (*str) || *str == '_' || *str == '.')
{
operand->error = _("Bad register name");
str -= 2;
}
return str;
}
static char *
parse_ac5 (char *str, struct pdp11_code *operand)
{
str = skip_whitespace (str);
if (startswith (str, "fr")
|| startswith (str, "FR")
|| startswith (str, "ac")
|| startswith (str, "AC"))
{
str += 2;
switch (*str)
{
case '0': case '1': case '2': case '3':
case '4': case '5':
operand->code = *str - '0';
str++;
break;
default:
operand->error = _("Bad register name");
return str - 2;
}
}
else
{
operand->error = _("Bad register name");
return str;
}
return str;
}
static char *
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 *
parse_expression (char *str, struct pdp11_code *operand)
{
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:
{
if (startswith (str, "-(")) /* -(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 != '(')
{
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->reloc.type = BFD_RELOC_16;
operand->reloc.pc_rel = 0;
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 == '*')
{
/* @(Rn) == @0(Rn): Mode 7, Indexed deferred.
Check for auto-increment deferred. */
if (str[1] == '('
&& str[2] != 0
&& str[3] != 0
&& str[4] != 0
&& str[5] != '+')
{
/* Change implied to explicit index deferred. */
*str = '0';
str = parse_op_no_deferred (str, operand);
}
else
{
/* @Rn == (Rn): Register deferred. */
str = parse_reg (str + 1, operand);
/* Not @Rn */
if (operand->error)
{
operand->error = NULL;
str = parse_op_no_deferred (str, 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;
const 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 *)str_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);
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_pointer;
new_pointer = 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_pointer;
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_pointer;
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_pointer = 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_pointer;
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 ("%s", 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 (const 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 (!startswith (arg, "11"))
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 (startswith (buf, "a"))
return 1; /* No extensions. */
/* KB11 (11/45/50/55/70). */
else if (startswith (buf, "b"))
return set_option ("eis") && set_option ("spl");
/* KD11-A (11/35/40). */
else if (startswith (buf, "da"))
return set_option ("limited-eis");
/* KD11-B (11/05/10). */
else if (startswith (buf, "db")
/* KD11-D (11/04). */
|| startswith (buf, "dd"))
return 1; /* no extensions */
/* KD11-E (11/34). */
else if (startswith (buf, "de"))
return set_option ("eis") && set_option ("mxps");
/* KD11-F (11/03). */
else if (startswith (buf, "df")
/* KD11-H (11/03). */
|| startswith (buf, "dh")
/* KD11-Q (11/03). */
|| startswith (buf, "dq"))
return set_option ("limited-eis") && set_option ("mxps");
/* KD11-K (11/60). */
else if (startswith (buf, "dk"))
return set_option ("eis")
&& set_option ("mxps")
&& set_option ("ucode");
/* KD11-Z (11/44). */
else if (startswith (buf, "dz"))
return set_option ("csm")
&& set_option ("eis")
&& set_option ("mfpt")
&& set_option ("mxps")
&& set_option ("spl");
/* F11 (11/23/24). */
else if (startswith (buf, "f"))
return set_option ("eis")
&& set_option ("mfpt")
&& set_option ("mxps");
/* J11 (11/53/73/83/84/93/94). */
else if (startswith (buf, "j"))
return set_option ("csm")
&& set_option ("eis")
&& set_option ("mfpt")
&& set_option ("multiproc")
&& set_option ("mxps")
&& set_option ("spl");
/* T11 (11/21). */
else if (startswith (buf, "t"))
return set_option ("limited-eis")
&& set_option ("mxps");
else
return 0;
}
static int
set_machine_model (const char *arg)
{
if (!startswith (arg, "pdp-11/")
&& !startswith (arg, "pdp11/")
&& !startswith (arg, "11/"))
return 0;
if (startswith (arg, "pdp"))
arg += 3;
if (arg[0] == '-')
arg++;
if (startswith (arg, "11/"))
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, const 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 extensions:\n\
\n\
-m(no-)cis allow (disallow) commercial 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-extensions disallow all instruction set extensions\n\
-pic generate position-independent 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 = XNEW (arelent);
reloc->sym_ptr_ptr = XNEW (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;
code = fixp->fx_r_type;
if (fixp->fx_pcrel)
{
switch (code)
{
case BFD_RELOC_16:
code = BFD_RELOC_16_PCREL;
break;
case BFD_RELOC_16_PCREL:
break;
default:
BAD_CASE (code);
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);
}
const char *
md_atof (int type, char * litP, int * sizeP)
{
return vax_md_atof (type, litP, sizeP);
}
Reference in a new issue Copy permalink