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darling-gdb/gas/config/tc-pdp11.c

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/* tc-pdp11.c - pdp11-specific -
Copyright 2001 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 2, 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, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
/*
Apparently unused functions:
md_convert_frag
md_estimate_size_before_relax
md_create_short_jump
md_create_long_jump
*/
#include "as.h"
#include "safe-ctype.h"
#include "opcode/pdp11.h"
static int set_option PARAMS ((char *arg));
static int set_cpu_model PARAMS ((char *arg));
static int set_machine_model PARAMS ((char *arg));
#define TRUE 1
#define FALSE 0
/*
* A representation for PDP-11 machine code.
*/
struct pdp11_code
{
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[] = "dDfFgGhH";
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 void
init_defaults ()
{
static int first = 1;
if (first)
{
set_option ("all-extensions");
set_option ("pic");
first = 0;
}
}
static struct hash_control *insn_hash = NULL;
void
md_begin ()
{
int i;
init_defaults ();
insn_hash = hash_new ();
if (insn_hash == NULL)
as_fatal ("Virtual memory exhausted");
for (i = 0; i < pdp11_num_opcodes; i++)
hash_insert (insn_hash, pdp11_opcodes[i].name, (PTR)(pdp11_opcodes + i));
for (i = 0; i < pdp11_num_aliases; i++)
hash_insert (insn_hash, pdp11_aliases[i].name, (PTR)(pdp11_aliases + i));
}
void
md_number_to_chars (con, value, nbytes)
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
* anyones 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;
default:
BAD_CASE (nbytes);
}
}
/* Fix up some data or instructions after we find out the value of a symbol
that they reference. */
int /* Knows about order of bytes in address. */
md_apply_fix (fixP, value)
fixS *fixP;
valueT *value;
{
valueT code;
valueT mask;
char *buf;
int shift;
int size;
buf = fixP->fx_where + fixP->fx_frag->fr_literal;
size = fixP->fx_size;
code = md_chars_to_number (buf, size);
switch (fixP->fx_r_type)
{
case BFD_RELOC_16:
case BFD_RELOC_16_PCREL:
mask = 0xffff;
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;
break;
default:
BAD_CASE (fixP->fx_r_type);
}
if (fixP->fx_addsy != NULL)
*value += symbol_get_bfdsym (fixP->fx_addsy)->section->vma;
/* *value += fixP->fx_addsy->bsym->section->vma; */
code &= ~mask;
code |= (*value >> shift) & mask;
number_to_chars_littleendian (buf, code, size);
return 0;
}
long
md_chars_to_number (con, nbytes)
unsigned char con[]; /* Low order byte 1st. */
int nbytes; /* Number of bytes in the input. */
{
/* On a PDP-11, 0x1234 is stored as "\x12\x34", and
* 0x12345678 is stored as "\x56\x78\x12\x34". It's
* anyones 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 (strncmp (str, "sp", 2) == 0 ||
strncmp (str, "SP", 2) == 0)
{
operand->code = 6;
str += 2;
}
else if (strncmp (str, "pc", 2) == 0 ||
strncmp (str, "PC", 2) == 0)
{
operand->code = 7;
str += 2;
}
else
{
operand->error = "Bad register name";
return str;
}
return str;
}
static char *
parse_ac (char *str, struct pdp11_code *operand)
{
str = skip_whitespace (str);
if (strncmp (str, "fr", 2) == 0 ||
strncmp (str, "FR", 2) == 0 ||
strncmp (str, "ac", 2) == 0 ||
strncmp (str, "AC", 2) == 0)
{
str += 2;
switch (*str)
{
case '0': case '1': case '2': case '3':
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_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;
if (operand->reloc.exp.X_op == O_constant)
{
if (*str == '.')
str++;
else
{
/* FIXME: buffer overflow! */
char buf[100];
char *end;
sprintf (buf, "%ld", operand->reloc.exp.X_add_number);
operand->reloc.exp.X_add_number = strtol (buf, &end, 8);
}
}
return str;
}
static char *
parse_op_no_deferred (char *str, struct pdp11_code *operand)
{
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;
case '#': /* immediate */
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;
default:
operand->error = "Error in expression";
break;
}
operand->code = 027;
break;
default: /* label, d(rn), -(rn) */
{
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 != '(') /* label */
{
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;
}
str++; /* d(rn) */
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 (char *str, struct pdp11_code *operand)
{
str = skip_whitespace (str);
str = parse_reg (str, operand);
if (!operand->error)
return 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_separator (char *str, int *error)
{
str = skip_whitespace (str);
*error = (*str != ',');
if (!*error)
str++;
return str;
}
void
md_assemble (instruction_string)
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)
{
#if 0
op1.error = NULL;
op1.additional = FALSE;
op1.reloc.type = BFD_RELOC_NONE;
op1.code = 0;
op1.word = 0;
str = parse_expression (str, &op1);
if (op1.error)
{
as_bad (op1.error);
return;
}
{
char *to = frag_more (2);
md_number_to_chars (to, op1.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);
}
#else
as_warn ("Unknown instruction");
#endif
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;
switch (op->type)
{
case PDP11_OPCODE_IMM3:
if (op1.code & ~7)
{
op1.error = "3-bit immediate out of range";
break;
}
break;
case PDP11_OPCODE_IMM6:
if (op1.code & ~0x3f)
{
op1.error = "6-bit immediate out of range";
break;
}
break;
case PDP11_OPCODE_IMM8:
if (op1.code & ~0xff)
{
op1.error = "8-bit immediate out of range";
break;
}
break;
}
insn.code |= op1.code;
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_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_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_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 (fragP, segment)
fragS *fragP ATTRIBUTE_UNUSED;
segT segment ATTRIBUTE_UNUSED;
{
return 0;
}
void
md_convert_frag (headers, seg, fragP)
bfd *headers ATTRIBUTE_UNUSED;
segT seg ATTRIBUTE_UNUSED;
fragS *fragP ATTRIBUTE_UNUSED;
{
}
CONST int md_short_jump_size = 2;
CONST int md_long_jump_size = 4;
void
md_create_short_jump (ptr, from_addr, to_addr, frag, to_symbol)
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 (ptr, from_addr, to_addr, frag, to_symbol)
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_option (arg)
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 (strncmp (arg, "no-", 3) == 0)
{
yes = 0;
arg += 3;
}
if (strcmp (arg, "cis") == 0) /* commersial instructions */
pdp11_extension[PDP11_CIS] = yes;
else if (strcmp (arg, "csm") == 0) /* call supervisor mode */
pdp11_extension[PDP11_CSM] = yes;
else if (strcmp (arg, "eis") == 0) /* extended instruction set */
pdp11_extension[PDP11_EIS] = pdp11_extension[PDP11_LEIS] = yes;
else if (strcmp (arg, "fis") == 0 || /* KEV11 floating-point */
strcmp (arg, "kev11") == 0 ||
strcmp (arg, "kev-11") == 0)
pdp11_extension[PDP11_FIS] = yes;
else if (strcmp (arg, "fpp") == 0 || /* FP-11 floating-point */
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;
else if (strcmp (arg, "limited-eis") == 0) /* limited extended insns */
{
pdp11_extension[PDP11_LEIS] = yes;
if (!pdp11_extension[PDP11_LEIS])
pdp11_extension[PDP11_EIS] = 0;
}
else if (strcmp (arg, "mfpt") == 0) /* move from processor type */
pdp11_extension[PDP11_MFPT] = yes;
else if (strncmp (arg, "mproc", 5) == 0 || /* multiprocessor insns: */
strncmp (arg, "multiproc", 9) == 0 ) /* TSTSET, WRTLCK */
pdp11_extension[PDP11_MPROC] = yes;
else if (strcmp (arg, "mxps") == 0) /* move from/to proc status */
pdp11_extension[PDP11_MXPS] = yes;
else if (strcmp (arg, "pic") == 0) /* position-independent code */
asm_option[ASM_OPT_PIC] = yes;
else if (strcmp (arg, "spl") == 0) /* set priority level */
pdp11_extension[PDP11_SPL] = yes;
else if (strcmp (arg, "ucode") == 0 || /* microcode instructions: */
strcmp (arg, "microcode") == 0) /* LDUB, MED, XFC */
pdp11_extension[PDP11_UCODE] = yes;
else
return 0;
return 1;
}
static int
set_cpu_model (arg)
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");
if (strncmp (buf, "a", 1) == 0) /* KA11 (11/15/20) */
return 1; /* no extensions */
else if (strncmp (buf, "b", 1) == 0) /* KB11 (11/45/50/55/70) */
return set_option ("eis") &&
set_option ("spl");
else if (strncmp (buf, "da", 2) == 0) /* KD11-A (11/35/40) */
return set_option ("limited-eis");
else if (strncmp (buf, "db", 2) == 0 || /* KD11-B (11/05/10) */
strncmp (buf, "dd", 2) == 0) /* KD11-D (11/04) */
return 1; /* no extensions */
else if (strncmp (buf, "de", 2) == 0) /* KD11-E (11/34) */
return set_option ("eis") &&
set_option ("mxps");
else if (strncmp (buf, "df", 2) == 0 || /* KD11-F (11/03) */
strncmp (buf, "dh", 2) == 0 || /* KD11-H (11/03) */
strncmp (buf, "dq", 2) == 0) /* KD11-Q (11/03) */
return set_option ("limited-eis") &&
set_option ("mxps");
else if (strncmp (buf, "dk", 2) == 0) /* KD11-K (11/60) */
return set_option ("eis") &&
set_option ("mxps") &&
set_option ("ucode");
else if (strncmp (buf, "dz", 2) == 0) /* KD11-Z (11/44) */
return set_option ("csm") &&
set_option ("eis") &&
set_option ("mfpt") &&
set_option ("mxps") &&
set_option ("spl");
else if (strncmp (buf, "f", 1) == 0) /* F11 (11/23/24) */
return set_option ("eis") &&
set_option ("mfpt") &&
set_option ("mxps");
else if (strncmp (buf, "j", 1) == 0) /* J11 (11/53/73/83/84/93/94)*/
return set_option ("csm") &&
set_option ("eis") &&
set_option ("mfpt") &&
set_option ("multiproc") &&
set_option ("mxps") &&
set_option ("spl");
else if (strncmp (buf, "t", 1) == 0) /* T11 (11/21) */
return set_option ("limited-eis") &&
set_option ("mxps");
else
return 0;
}
static int
set_machine_model (arg)
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) /* 11/03 */
return set_cpu_model ("kd11f"); /* KD11-F */
else if (strcmp (arg, "04") == 0) /* 11/04 */
return set_cpu_model ("kd11d"); /* KD11-D */
else if (strcmp (arg, "05") == 0 || /* 11/05 or 11/10 */
strcmp (arg, "10") == 0)
return set_cpu_model ("kd11b"); /* KD11-B */
else if (strcmp (arg, "15") == 0 || /* 11/15 or 11/20 */
strcmp (arg, "20") == 0)
return set_cpu_model ("ka11"); /* KA11 */
else if (strcmp (arg, "21") == 0) /* 11/21 */
return set_cpu_model ("t11"); /* T11 */
else if (strcmp (arg, "23") == 0 || /* 11/23 or 11/24 */
strcmp (arg, "24") == 0)
return set_cpu_model ("f11"); /* F11 */
else if (strcmp (arg, "34") == 0 || /* 11/34 or 11/34a */
strcmp (arg, "34a") == 0)
return set_cpu_model ("kd11e"); /* KD11-E */
else if (strcmp (arg, "35") == 0 || /* 11/35 or 11/40 */
strcmp (arg, "40") == 0)
return set_cpu_model ("kd11da"); /* KD11-A */
else if (strcmp (arg, "44") == 0) /* 11/44 */
return set_cpu_model ("kd11dz"); /* KD11-Z */
else if (strcmp (arg, "45") == 0 || /* 11/45/50/55/70 */
strcmp (arg, "50") == 0 ||
strcmp (arg, "55") == 0 ||
strcmp (arg, "70") == 0)
return set_cpu_model ("kb11"); /* KB11 */
else if (strcmp (arg, "60") == 0) /* 11/60 */
return set_cpu_model ("kd11k"); /* KD11-K */ /* FPP? */
else if (strcmp (arg, "53") == 0 || /* 11/53/73/83/84/93/94 */
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") && /* J11 */
set_option ("fpp"); /* All J11 machines come */
/* with FPP installed. */
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);
/*
* md_parse_option
* Invocation line includes a switch not recognized by the base assembler.
* See if it's a processor-specific option.
*/
int
md_parse_option (c, arg)
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;
}
as_bad ("unrecognized option `-%c%s'", c, arg ? arg : "");
return 0;
}
/*
One possible way of parsing options.
enum
{
OPTION_CSM,
OPTION_CIS,
...
};
struct
{
CONST char *pattern;
int opt;
CONST char *description;
} options;
static struct options extension_opts[] =
{
{ "Ncsm", OPTION_CSM,
"allow (disallow) CSM instruction" },
{ "Ncis", OPTION_CIS,
"allow (disallow) commersial instruction set" },
{ "Neis", OPTION_EIS,
"allow (disallow) extended instruction set" },
...
{ "all-extensions", OPTION_ALL_EXTENSIONS,
"allow all instruction set extensions\n\
(this is the default)" },
{ "no-extensions", OPTION_NO_EXTENSIONS,
"disallow all instruction set extensions" },
{ "pic", OPTION_PIC,
"position-independent code" },
};
static struct options cpu_opts[] =
{
{ "Ka_11_*", OPTION_KA11, "KA11 CPU. ..." },
{ "Kb_11_*", OPTION_KB11, "KB11 CPU. ..." },
{ "Kd_11_a*", OPTION_KD11A, "KD11-A CPU. ..." },
{ "Kd_11_b*", OPTION_KD11B, "KD11-B CPU. ..." },
{ "Kd_11_d*", OPTION_KD11D, "KD11-D CPU. ..." },
{ "Kd_11_e*", OPTION_KD11E, "KD11-E CPU. ..." },
{ "Kd_11_f*", OPTION_KD11F, "KD11-F CPU. ..." },
{ "Kd_11_h*", OPTION_KD11H, "KD11-H CPU. ..." },
{ "Kd_11_q*", OPTION_KD11Q, "KD11-Q CPU. ..." },
{ "Kd_11_z*", OPTION_KD11Z, "KD11-Z CPU. ..." },
{ "Df_11_*", OPTION_F11, "F11 CPU. ..." },
{ "Dj_11_*", OPTION_J11, "J11 CPU. ..." },
{ "Dt_11_*", OPTION_T11, "T11 CPU. ..." },
};
static struct options model_opts[] =
{
{ "P03", OPTION_PDP11_03, "same as ..." },
{ "P04", OPTION_PDP11_04, "same as ..." },
{ "P05", OPTION_PDP11_05, "same as ..." },
{ "P10", OPTION_PDP11_10, "same as ..." },
{ "P15", OPTION_PDP11_15, "same as ..." },
{ "P20", OPTION_PDP11_20, "same as ..." },
{ "P21", OPTION_PDP11_21, "same as ..." },
{ "P24", OPTION_PDP11_24, "same as ..." },
{ "P34", OPTION_PDP11_34, "same as ..." },
{ "P34a", OPTION_PDP11_34A, "same as ..." },
{ "P40", OPTION_PDP11_40, "same as ..." },
{ "P44", OPTION_PDP11_44, "same as ..." },
{ "P45", OPTION_PDP11_45, "same as ..." },
{ "P50", OPTION_PDP11_50, "same as ..." },
{ "P53", OPTION_PDP11_53, "same as ..." },
{ "P55", OPTION_PDP11_55, "same as ..." },
{ "P60", OPTION_PDP11_60, "same as ..." },
{ "P70", OPTION_PDP11_70, "same as ..." },
{ "P73", OPTION_PDP11_73, "same as ..." },
{ "P83", OPTION_PDP11_83, "same as ..." },
{ "P84", OPTION_PDP11_84, "same as ..." },
{ "P93", OPTION_PDP11_93, "same as ..." },
{ "P94", OPTION_PDP11_94, "same as ..." },
};
struct
{
CONST char *title;
struct options *opts;
int num;
} all_opts[] =
{
{ "PDP-11 instruction set extentions",
extension_opts,
sizeof extension_opts / sizeof extension_opts[0] },
{ "PDP-11 CPU model options",
cpu_opts,
sizeof cpu_opts / sizeof cpu_opts[0] },
{ "PDP-11 machine model options",
model_opts,
sizeof model_opts / sizeof model_opts[0] },
};
int
parse_match (char *arg, char *pattern)
{
int yes = 1;
while (*pattern)
{
switch (*pattern++)
{
case 'N':
if (strncmp (arg, "no-") == 0)
{
yes = 0;
arg += 3;
}
break;
case 'K':
if (arg[0] == 'k')
arg++;
break;
case 'D':
if (strncmp (arg, "kd", 2) == 0)
arg +=2;
break;
case 'P':
if (strncmp (arg, "pdp-11/", 7) == 0)
arg += 7;
else if (strncmp (arg, "pdp11/", 6) == 0)
arg += 6;
else if (strncmp (arg, "11/", 3) == 0)
arg += 3;
break;
case '_':
if (arg[0] == "-")
{
if (*++arg == 0)
return 0;
}
break;
case '*':
return 1;
default:
if (*arg++ != pattern[-1])
return 0;
}
}
return arg[0] == 0;
}
int
fprint_opt (stream, pattern)
FILE *stream;
CONST char *pattern;
{
int n;
while (*pattern)
{
switch (*pattern++)
{
case 'N':
n += fprintf (stream, "(no-)");
break;
case 'K':
n += fprintf (stream, "k");
break;
case 'P':
n += fprintf (stream "11/");
break;
case 'D':
case '_':
case '*':
break;
default:
fputc (pattern[-1], stream);
n++;
}
}
return n;
}
int
parse_option (char *arg)
{
int i, j;
for (i = 0; i < sizeof all_opts / sizeof all_opts[0]; i++)
{
for (j = 0; j < all_opts[i].num; j++)
{
if (parse_match (arg, all_opts[i].opts[j].pattern))
{
set_option (all_opts[i].opts[j].opt);
return 1;
}
}
}
return 0;
}
static void
fprint_space (stream, n)
FILE *stream;
int n;
{
while (n--)
fputc (' ', stream);
}
void
md_show_usage (stream)
FILE *stream;
{
int i, j, n;
for (i = 0; i < sizeof all_opts / sizeof all_opts[0]; i++)
{
fprintf (stream "\n%s:\n\n", all_opts[i].title);
for (j = 0; j < all_opts[i].num; j++)
{
fprintf (stream, "-m");
n = fprintf_opt (stream, all_opts[i].opts[j].pattern);
fprint_space (stream, 22 - n);
fprintf (stream, "%s\n", all_opts[i].opts[j].description);
}
}
}
*/
void
md_show_usage (stream)
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 (name)
char *name ATTRIBUTE_UNUSED;
{
return 0;
}
valueT
md_section_align (segment, size)
segT segment ATTRIBUTE_UNUSED;
valueT size;
{
return (size + 1) & ~1;
}
long
md_pcrel_from (fixP)
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 (section, fixp)
asection *section ATTRIBUTE_UNUSED;
fixS *fixp;
{
arelent *reloc;
bfd_reloc_code_real_type code;
reloc = (arelent *) xmalloc (sizeof (arelent));
reloc->sym_ptr_ptr = (asymbol **) 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 (c)
int c ATTRIBUTE_UNUSED;
{
int temp;
temp = get_absolute_expression ();
subseg_set (bss_section, temp);
demand_empty_rest_of_line ();
}
void
pseudo_even (c)
int c ATTRIBUTE_UNUSED;
{
int alignment = 1; /* 2^1 */
frag_align (alignment, 0, 1);
record_alignment (now_seg, alignment);
}
/* end of tc-pdp11.c */
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