9b0da28b13
Do generic rs_machine_dependent relaxation only if TC_GENERIC_RELAX_TABLE is defined. Use its value as the base of the table, so the actual declaration can be cpu-specific (and const or not as appropriate). For other cpus where this isn't done (the majority), delete md_relax_table altogether. For machines with WORKING_DOT_WORD, delete md_{short,long}_jump_size.
1245 lines
23 KiB
C
1245 lines
23 KiB
C
/* tc-w65.c -- Assemble code for the W65816
|
|
|
|
Copyright (C) 1995 Free Software Foundation.
|
|
|
|
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, 675 Mass Ave, Cambridge, MA 02139, USA. */
|
|
|
|
/*
|
|
Written By Steve Chamberlain
|
|
sac@cygnus.com
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include "as.h"
|
|
#include "bfd.h"
|
|
#include "subsegs.h"
|
|
#define DEFINE_TABLE
|
|
#include "../opcodes/w65-opc.h"
|
|
#include <ctype.h>
|
|
|
|
const char comment_chars[] = "!";
|
|
CONST char line_separator_chars[] = ";";
|
|
const char line_comment_chars[] = "!#";
|
|
|
|
/* This table describes all the machine specific pseudo-ops the assembler
|
|
has to support. The fields are:
|
|
pseudo-op name without dot
|
|
function to call to execute this pseudo-op
|
|
Integer arg to pass to the function
|
|
*/
|
|
|
|
#define OP_BCC 0x90
|
|
#define OP_BCS 0xB0
|
|
#define OP_BEQ 0xF0
|
|
#define OP_BMI 0x30
|
|
#define OP_BNE 0xD0
|
|
#define OP_BPL 0x10
|
|
#define OP_BRA 0x80
|
|
#define OP_BRL 0x82
|
|
#define OP_BVC 0x50
|
|
#define OP_BVS 0x70
|
|
|
|
void s_longa ();
|
|
const pseudo_typeS md_pseudo_table[] =
|
|
{
|
|
{"int", cons, 2},
|
|
{"word", cons, 2},
|
|
{"longa", s_longa, 0},
|
|
{"longi", s_longa, 1},
|
|
{0, 0, 0}
|
|
};
|
|
|
|
|
|
void cons ();
|
|
void s_align_bytes ();
|
|
|
|
|
|
/*int md_reloc_size; */
|
|
|
|
static int relax; /* set if -relax seen */
|
|
|
|
const char EXP_CHARS[] = "eE";
|
|
|
|
/* Chars that mean this number is a floating point constant */
|
|
/* As in 0f12.456 */
|
|
/* or 0d1.2345e12 */
|
|
const char FLT_CHARS[] = "rRsSfFdDxXpP";
|
|
|
|
|
|
|
|
static struct hash_control *opcode_hash_control; /* Opcode mnemonics */
|
|
|
|
int M; /* M flag */
|
|
int X; /* X flag */
|
|
|
|
|
|
|
|
|
|
#define C(a,b) ENCODE_RELAX(a,b)
|
|
#define ENCODE_RELAX(what,length) (((what) << 2) + (length))
|
|
|
|
#define GET_WHAT(x) ((x>>2))
|
|
|
|
#define BYTE_DISP 1
|
|
#define WORD_DISP 2
|
|
#define UNDEF_BYTE_DISP 0
|
|
#define UNDEF_WORD_DISP 3
|
|
|
|
#define COND_BRANCH 1
|
|
#define UNCOND_BRANCH 2
|
|
#define END 3
|
|
|
|
#define BYTE_F 127 /* How far we can branch forwards */
|
|
#define BYTE_B -126 /* How far we can branch backwards */
|
|
#define WORD_F 32767
|
|
#define WORD_B 32768
|
|
|
|
relax_typeS md_relax_table[C (END, 0)];
|
|
|
|
/*
|
|
This function is called once, at assembler startup time. This should
|
|
set up all the tables, etc that the MD part of the assembler needs
|
|
*/
|
|
|
|
|
|
void
|
|
s_longa (xmode)
|
|
{
|
|
int *p = xmode ? &X : &M;
|
|
while (*input_line_pointer == ' ')
|
|
input_line_pointer++;
|
|
if (strncmp (input_line_pointer, "on", 2) == 0)
|
|
{
|
|
input_line_pointer += 2;
|
|
*p = 0;
|
|
}
|
|
else if (strncmp (input_line_pointer, "off", 3) == 0)
|
|
{
|
|
*p = 1;
|
|
input_line_pointer += 3;
|
|
}
|
|
else
|
|
as_bad ("need on or off.");
|
|
demand_empty_rest_of_line ();
|
|
}
|
|
void
|
|
md_begin ()
|
|
{
|
|
relax_typeS *table;
|
|
struct opinfo *opcode;
|
|
char *prev_name = "";
|
|
|
|
opcode_hash_control = hash_new ();
|
|
|
|
/* Insert unique names into hash table */
|
|
for (opcode = optable; opcode->name; opcode++)
|
|
{
|
|
if (strcmp (prev_name, opcode->name))
|
|
{
|
|
prev_name = opcode->name;
|
|
hash_insert (opcode_hash_control, opcode->name, (char *) opcode);
|
|
}
|
|
else
|
|
{
|
|
/* Make all the opcodes with the same name point to the same
|
|
string */
|
|
opcode->name = prev_name;
|
|
}
|
|
}
|
|
|
|
|
|
/* Initialize the relax table. We use a local variable to avoid
|
|
warnings about modifying a supposedly const data structure. */
|
|
table = (relax_typeS *) md_relax_table;
|
|
table[C (COND_BRANCH, BYTE_DISP)].rlx_forward = BYTE_F;
|
|
table[C (COND_BRANCH, BYTE_DISP)].rlx_backward = BYTE_B;
|
|
table[C (COND_BRANCH, BYTE_DISP)].rlx_length = 2;
|
|
table[C (COND_BRANCH, BYTE_DISP)].rlx_more = C (COND_BRANCH, WORD_DISP);
|
|
|
|
table[C (COND_BRANCH, WORD_DISP)].rlx_forward = WORD_F;
|
|
table[C (COND_BRANCH, WORD_DISP)].rlx_backward = WORD_B;
|
|
table[C (COND_BRANCH, WORD_DISP)].rlx_length = 5;
|
|
table[C (COND_BRANCH, WORD_DISP)].rlx_more = 0;
|
|
|
|
table[C (UNCOND_BRANCH, BYTE_DISP)].rlx_forward = BYTE_F;
|
|
table[C (UNCOND_BRANCH, BYTE_DISP)].rlx_backward = BYTE_B;
|
|
table[C (UNCOND_BRANCH, BYTE_DISP)].rlx_length = 2;
|
|
table[C (UNCOND_BRANCH, BYTE_DISP)].rlx_more = C (UNCOND_BRANCH, WORD_DISP);
|
|
|
|
table[C (UNCOND_BRANCH, WORD_DISP)].rlx_forward = WORD_F;
|
|
table[C (UNCOND_BRANCH, WORD_DISP)].rlx_backward = WORD_B;
|
|
table[C (UNCOND_BRANCH, WORD_DISP)].rlx_length = 3;
|
|
table[C (UNCOND_BRANCH, WORD_DISP)].rlx_more = 0;
|
|
|
|
flag_signed_overflow_ok = 1;
|
|
}
|
|
|
|
static expressionS immediate; /* absolute expression */
|
|
static expressionS immediate1; /* absolute expression */
|
|
|
|
|
|
static symbolS *
|
|
dot ()
|
|
{
|
|
const char *fake;
|
|
|
|
/* JF: '.' is pseudo symbol with value of current location
|
|
in current segment. */
|
|
fake = FAKE_LABEL_NAME;
|
|
return symbol_new (fake,
|
|
now_seg,
|
|
(valueT) frag_now_fix (),
|
|
frag_now);
|
|
|
|
}
|
|
|
|
int expr_size;
|
|
int expr_shift;
|
|
int tc_cons_reloc;
|
|
void
|
|
w65_expression (dest, bytes)
|
|
expressionS *dest;
|
|
unsigned int bytes;
|
|
{
|
|
expr_size = 0;
|
|
expr_shift = 0;
|
|
tc_cons_reloc = 0;
|
|
while (*input_line_pointer == ' ')
|
|
input_line_pointer++;
|
|
|
|
if (*input_line_pointer == '<')
|
|
{
|
|
expr_size = 1;
|
|
input_line_pointer++;
|
|
}
|
|
else if (*input_line_pointer == '>')
|
|
{
|
|
expr_shift = 1;
|
|
input_line_pointer++;
|
|
}
|
|
else if (*input_line_pointer == '^')
|
|
{
|
|
expr_shift = 2;
|
|
input_line_pointer++;
|
|
}
|
|
|
|
expr (0, dest);
|
|
}
|
|
|
|
int amode;
|
|
static
|
|
char *
|
|
parse_exp (s, bytes)
|
|
char *s;
|
|
int bytes;
|
|
{
|
|
char *save;
|
|
char *new;
|
|
|
|
save = input_line_pointer;
|
|
input_line_pointer = s;
|
|
w65_expression (&immediate, bytes);
|
|
if (immediate.X_op == O_absent)
|
|
as_bad ("missing operand");
|
|
new = input_line_pointer;
|
|
input_line_pointer = save;
|
|
return new;
|
|
}
|
|
|
|
|
|
static
|
|
char *
|
|
get_operands (info, ptr)
|
|
struct opinfo *info;
|
|
char *ptr;
|
|
{
|
|
register int override_len = 0;
|
|
register int bytes = 0;
|
|
while (*ptr == ' ')
|
|
ptr++;
|
|
|
|
if (ptr[0] == '#')
|
|
{
|
|
ptr++;
|
|
switch (info->amode)
|
|
{
|
|
case ADDR_IMMTOI:
|
|
bytes = X ? 1 : 2;
|
|
amode = ADDR_IMMTOI;
|
|
break;
|
|
case ADDR_IMMTOA:
|
|
bytes = M ? 1 : 2;
|
|
amode = ADDR_IMMTOA;
|
|
break;
|
|
case ADDR_IMMCOP:
|
|
bytes = 1;
|
|
amode = ADDR_IMMCOP;
|
|
break;
|
|
case ADDR_DIR:
|
|
bytes = 2;
|
|
amode = ADDR_ABS;
|
|
break;
|
|
default:
|
|
abort ();
|
|
break;
|
|
}
|
|
ptr = parse_exp (ptr);
|
|
}
|
|
else if (ptr[0] == '!')
|
|
{
|
|
ptr = parse_exp (ptr + 1);
|
|
if (ptr[0] == ',')
|
|
{
|
|
if (ptr[1] == 'y')
|
|
{
|
|
amode = ADDR_ABS_IDX_Y;
|
|
bytes = 2;
|
|
ptr += 2;
|
|
}
|
|
else if (ptr[1] == 'x')
|
|
{
|
|
amode = ADDR_ABS_IDX_X;
|
|
bytes = 2;
|
|
ptr += 2;
|
|
}
|
|
else
|
|
{
|
|
as_bad ("syntax error after <exp");
|
|
}
|
|
}
|
|
else
|
|
{
|
|
amode = ADDR_ABS;
|
|
bytes = 2;
|
|
}
|
|
}
|
|
else if (ptr[0] == '>')
|
|
{
|
|
ptr = parse_exp (ptr + 1);
|
|
if (ptr[0] == ',' && ptr[1] == 'x')
|
|
{
|
|
amode = ADDR_ABS_LONG_IDX_X;
|
|
bytes = 3;
|
|
ptr += 2;
|
|
}
|
|
else
|
|
{
|
|
amode = ADDR_ABS_LONG;
|
|
bytes = 3;
|
|
}
|
|
}
|
|
else if (ptr[0] == '<')
|
|
{
|
|
ptr = parse_exp (ptr + 1);
|
|
if (ptr[0] == ',')
|
|
{
|
|
if (ptr[1] == 'y')
|
|
{
|
|
amode = ADDR_DIR_IDX_Y;
|
|
ptr += 2;
|
|
bytes = 2;
|
|
}
|
|
else if (ptr[1] == 'x')
|
|
{
|
|
amode = ADDR_DIR_IDX_X;
|
|
ptr += 2;
|
|
bytes = 2;
|
|
}
|
|
else
|
|
{
|
|
as_bad ("syntax error after <exp");
|
|
}
|
|
}
|
|
else
|
|
{
|
|
amode = ADDR_DIR;
|
|
bytes = 1;
|
|
}
|
|
}
|
|
else if (ptr[0] == 'a')
|
|
{
|
|
amode = ADDR_ACC;
|
|
}
|
|
else if (ptr[0] == '(')
|
|
{
|
|
/* Look for (exp),y
|
|
(<exp),y
|
|
(exp,x)
|
|
(<exp,x)
|
|
(exp)
|
|
(!exp)
|
|
(exp)
|
|
(<exp)
|
|
(exp,x)
|
|
(!exp,x)
|
|
(exp,s)
|
|
(exp,s),y */
|
|
|
|
ptr++;
|
|
if (ptr[0] == '<')
|
|
{
|
|
override_len = 1;
|
|
ptr++;
|
|
}
|
|
else if (ptr[0] == '!')
|
|
{
|
|
override_len = 2;
|
|
ptr++;
|
|
}
|
|
else if (ptr[0] == '>')
|
|
{
|
|
override_len = 3;
|
|
ptr++;
|
|
}
|
|
else
|
|
{
|
|
override_len = 0;
|
|
}
|
|
ptr = parse_exp (ptr);
|
|
|
|
if (ptr[0] == ',')
|
|
{
|
|
ptr++;
|
|
if (ptr[0] == 'x' && ptr[1] == ')')
|
|
{
|
|
ptr += 2;
|
|
|
|
if (override_len == 1)
|
|
{
|
|
amode = ADDR_DIR_IDX_IND_X;
|
|
bytes = 2;
|
|
}
|
|
else
|
|
{
|
|
amode = ADDR_ABS_IND_IDX;
|
|
bytes = 2;
|
|
}
|
|
}
|
|
else if (ptr[0] == 's' && ptr[1] == ')' && ptr[2] == ',' && ptr[3] == 'y')
|
|
{
|
|
amode = ADDR_STACK_REL_INDX_IDX;
|
|
bytes = 1;
|
|
ptr += 4;
|
|
}
|
|
}
|
|
else if (ptr[0] == ')')
|
|
{
|
|
if (ptr[1] == ',' && ptr[2] == 'y')
|
|
{
|
|
amode = ADDR_DIR_IND_IDX_Y;
|
|
ptr += 3;
|
|
bytes = 2;
|
|
}
|
|
else
|
|
{
|
|
if (override_len == 1)
|
|
{
|
|
amode = ADDR_DIR_IND;
|
|
bytes = 1;
|
|
}
|
|
else
|
|
{
|
|
amode = ADDR_ABS_IND;
|
|
bytes = 2;
|
|
}
|
|
ptr++;
|
|
|
|
}
|
|
}
|
|
|
|
}
|
|
else if (ptr[0] == '[')
|
|
{
|
|
ptr = parse_exp (ptr + 1);
|
|
if (ptr[0] == ']')
|
|
{
|
|
ptr++;
|
|
if (ptr[0] == ',' && ptr[1] == 'y')
|
|
{
|
|
bytes = 1;
|
|
amode = ADDR_DIR_IND_IDX_Y_LONG;
|
|
ptr += 2;
|
|
}
|
|
else
|
|
{
|
|
if (info->code == O_jmp)
|
|
{
|
|
bytes = 2;
|
|
amode = ADDR_ABS_IND_LONG;
|
|
}
|
|
else
|
|
{
|
|
bytes = 1;
|
|
|
|
amode = ADDR_DIR_IND_LONG;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
ptr = parse_exp (ptr, 2);
|
|
if (ptr[0] == ',')
|
|
{
|
|
if (ptr[1] == 'y')
|
|
{
|
|
if (override_len == 1)
|
|
{
|
|
bytes = 1;
|
|
amode = ADDR_DIR_IDX_Y;
|
|
}
|
|
else
|
|
{
|
|
amode = ADDR_ABS_IDX_Y;
|
|
bytes = 2;
|
|
}
|
|
ptr += 2;
|
|
}
|
|
else if (ptr[1] == 'x')
|
|
{
|
|
if (override_len == 1)
|
|
{
|
|
amode = ADDR_DIR_IDX_X;
|
|
bytes = 1;
|
|
}
|
|
else
|
|
{
|
|
amode = ADDR_ABS_IDX_X;
|
|
bytes = 2;
|
|
}
|
|
ptr += 2;
|
|
}
|
|
else if (ptr[1] == 's')
|
|
{
|
|
bytes = 1;
|
|
amode = ADDR_STACK_REL;
|
|
ptr += 2;
|
|
}
|
|
else
|
|
{
|
|
bytes = 1;
|
|
immediate1 = immediate;
|
|
ptr = parse_exp (ptr + 1);
|
|
amode = ADDR_BLOCK_MOVE;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
switch (info->amode)
|
|
{
|
|
case ADDR_PC_REL:
|
|
amode = ADDR_PC_REL;
|
|
bytes = 1;
|
|
break;
|
|
case ADDR_PC_REL_LONG:
|
|
amode = ADDR_PC_REL_LONG;
|
|
bytes = 2;
|
|
break;
|
|
default:
|
|
if (override_len == 1)
|
|
{
|
|
amode = ADDR_DIR;
|
|
bytes = 1;
|
|
}
|
|
else if (override_len == 3)
|
|
{
|
|
bytes = 3;
|
|
amode = ADDR_ABS_LONG;
|
|
}
|
|
else
|
|
{
|
|
amode = ADDR_ABS;
|
|
bytes = 2;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
switch (bytes)
|
|
{
|
|
case 1:
|
|
switch (expr_shift)
|
|
{
|
|
case 0:
|
|
if (amode == ADDR_DIR)
|
|
tc_cons_reloc = R_W65_DP;
|
|
else
|
|
tc_cons_reloc = R_W65_ABS8;
|
|
break;
|
|
case 1:
|
|
tc_cons_reloc = R_W65_ABS8S8;
|
|
break;
|
|
case 2:
|
|
tc_cons_reloc = R_W65_ABS8S16;
|
|
break;
|
|
}
|
|
break;
|
|
case 2:
|
|
switch (expr_shift)
|
|
{
|
|
case 0:
|
|
tc_cons_reloc = R_W65_ABS16;
|
|
break;
|
|
case 1:
|
|
tc_cons_reloc = R_W65_ABS16S8;
|
|
break;
|
|
case 2:
|
|
tc_cons_reloc = R_W65_ABS16S16;
|
|
break;
|
|
}
|
|
}
|
|
return ptr;
|
|
}
|
|
|
|
/* Passed a pointer to a list of opcodes which use different
|
|
addressing modes, return the opcode which matches the opcodes
|
|
provided
|
|
*/
|
|
|
|
static
|
|
struct opinfo *
|
|
get_specific (opcode)
|
|
struct opinfo *opcode;
|
|
{
|
|
int ocode = opcode->code;
|
|
|
|
for (; opcode->code == ocode; opcode++)
|
|
{
|
|
if (opcode->amode == amode)
|
|
return opcode;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
check (operand, low, high)
|
|
expressionS *operand;
|
|
int low;
|
|
int high;
|
|
{
|
|
if (operand->X_op != O_constant
|
|
|| operand->X_add_number < low
|
|
|| operand->X_add_number > high)
|
|
{
|
|
as_bad ("operand must be absolute in range %d..%d", low, high);
|
|
}
|
|
return operand->X_add_number;
|
|
}
|
|
|
|
|
|
static int log2[] =
|
|
{0, 0, 1, 0, 2};
|
|
|
|
/* Now we know what sort of opcodes it is, lets build the bytes -
|
|
*/
|
|
static void
|
|
build_Mytes (opcode)
|
|
struct opinfo *opcode;
|
|
{
|
|
int size;
|
|
int type;
|
|
int pcrel;
|
|
char *output;
|
|
|
|
if (opcode->amode == ADDR_IMPLIED)
|
|
{
|
|
output = frag_more (1);
|
|
}
|
|
else if (opcode->amode == ADDR_PC_REL)
|
|
{
|
|
int type;
|
|
/* This is a relaxable insn, so we do some special handling */
|
|
type = opcode->val == OP_BRA ? UNCOND_BRANCH : COND_BRANCH;
|
|
output = frag_var (rs_machine_dependent,
|
|
md_relax_table[C (type, WORD_DISP)].rlx_length,
|
|
md_relax_table[C (type, BYTE_DISP)].rlx_length,
|
|
C (type, UNDEF_BYTE_DISP),
|
|
immediate.X_add_symbol,
|
|
immediate.X_add_number,
|
|
0);
|
|
}
|
|
else
|
|
{
|
|
switch (opcode->amode)
|
|
{
|
|
GETINFO (size, type, pcrel);
|
|
}
|
|
|
|
/* If something special was done in the
|
|
expression modify the reloc type */
|
|
if (tc_cons_reloc)
|
|
{
|
|
type = tc_cons_reloc;
|
|
}
|
|
|
|
|
|
|
|
/* 1 byte for the opcode + the bytes for the addrmode */
|
|
output = frag_more (size + 1);
|
|
|
|
if (opcode->amode == ADDR_BLOCK_MOVE)
|
|
{
|
|
/* Two relocs for this one */
|
|
fix_new_exp (frag_now,
|
|
output + 1 - frag_now->fr_literal,
|
|
1,
|
|
&immediate,
|
|
0,
|
|
R_W65_ABS8S16);
|
|
|
|
fix_new_exp (frag_now,
|
|
output + 2 - frag_now->fr_literal,
|
|
1,
|
|
&immediate1,
|
|
0,
|
|
R_W65_ABS8S16);
|
|
}
|
|
else if (type >= 0
|
|
&& opcode->amode != ADDR_IMPLIED
|
|
&& opcode->amode != ADDR_ACC
|
|
&& opcode->amode != ADDR_STACK)
|
|
{
|
|
fix_new_exp (frag_now,
|
|
output + 1 - frag_now->fr_literal,
|
|
size,
|
|
&immediate,
|
|
pcrel,
|
|
type);
|
|
}
|
|
}
|
|
output[0] = opcode->val;
|
|
}
|
|
|
|
/* This is the guts of the machine-dependent assembler. STR points to a
|
|
machine dependent instruction. This function is supposed to emit
|
|
the frags/bytes it assembles to.
|
|
*/
|
|
|
|
void
|
|
md_assemble (str)
|
|
char *str;
|
|
{
|
|
unsigned char *op_start;
|
|
unsigned char *op_end;
|
|
struct opinfo *opcode;
|
|
char name[20];
|
|
int nlen = 0;
|
|
char *p;
|
|
|
|
/* Drop leading whitespace */
|
|
while (*str == ' ')
|
|
str++;
|
|
|
|
/* all opcodes are three letters */
|
|
name[0] = str[0];
|
|
name[1] = str[1];
|
|
name[2] = str[2];
|
|
name[3] = 0;
|
|
|
|
tc_cons_reloc = 0;
|
|
str += 3;
|
|
opcode = (struct opinfo *) hash_find (opcode_hash_control, name);
|
|
|
|
if (opcode == NULL)
|
|
{
|
|
as_bad ("unknown opcode");
|
|
return;
|
|
}
|
|
|
|
if (opcode->amode != ADDR_IMPLIED
|
|
&& opcode->amode != ADDR_STACK)
|
|
{
|
|
get_operands (opcode, str);
|
|
opcode = get_specific (opcode);
|
|
}
|
|
|
|
if (opcode == 0)
|
|
{
|
|
/* Couldn't find an opcode which matched the operands */
|
|
|
|
|
|
char *where = frag_more (1);
|
|
|
|
where[0] = 0x0;
|
|
where[1] = 0x0;
|
|
as_bad ("invalid operands for opcode");
|
|
return;
|
|
}
|
|
|
|
build_Mytes (opcode);
|
|
}
|
|
|
|
|
|
void
|
|
DEFUN (tc_crawl_symbol_chain, (headers),
|
|
object_headers * headers)
|
|
{
|
|
printf ("call to tc_crawl_symbol_chain \n");
|
|
}
|
|
|
|
symbolS *
|
|
DEFUN (md_undefined_symbol, (name),
|
|
char *name)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
void
|
|
DEFUN (tc_headers_hook, (headers),
|
|
object_headers * headers)
|
|
{
|
|
printf ("call to tc_headers_hook \n");
|
|
}
|
|
|
|
/* Various routines to kill one day */
|
|
/* Equal to MAX_PRECISION in atof-ieee.c */
|
|
#define MAX_LITTLENUMS 6
|
|
|
|
/* Turn a string in input_line_pointer into a floating point constant of type
|
|
type, and store the appropriate bytes in *litP. The number of LITTLENUMS
|
|
emitted is stored in *sizeP . An error message is returned, or NULL on OK.
|
|
*/
|
|
char *
|
|
md_atof (type, litP, sizeP)
|
|
char type;
|
|
char *litP;
|
|
int *sizeP;
|
|
{
|
|
int prec;
|
|
LITTLENUM_TYPE words[MAX_LITTLENUMS];
|
|
LITTLENUM_TYPE *wordP;
|
|
char *t;
|
|
char *atof_ieee ();
|
|
|
|
switch (type)
|
|
{
|
|
case 'f':
|
|
case 'F':
|
|
case 's':
|
|
case 'S':
|
|
prec = 2;
|
|
break;
|
|
|
|
case 'd':
|
|
case 'D':
|
|
case 'r':
|
|
case 'R':
|
|
prec = 4;
|
|
break;
|
|
|
|
case 'x':
|
|
case 'X':
|
|
prec = 6;
|
|
break;
|
|
|
|
case 'p':
|
|
case 'P':
|
|
prec = 6;
|
|
break;
|
|
|
|
default:
|
|
*sizeP = 0;
|
|
return "Bad call to MD_NTOF()";
|
|
}
|
|
t = atof_ieee (input_line_pointer, type, words);
|
|
if (t)
|
|
input_line_pointer = t;
|
|
|
|
*sizeP = prec * sizeof (LITTLENUM_TYPE);
|
|
for (wordP = words + prec - 1; prec--;)
|
|
{
|
|
md_number_to_chars (litP, (valueT) (*wordP--), sizeof (LITTLENUM_TYPE));
|
|
litP += sizeof (LITTLENUM_TYPE);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
md_parse_option (c,a)
|
|
int c;
|
|
char *a;
|
|
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
int md_short_jump_size;
|
|
|
|
void
|
|
tc_Nout_fix_to_chars ()
|
|
{
|
|
printf ("call to tc_Nout_fix_to_chars \n");
|
|
abort ();
|
|
}
|
|
|
|
void
|
|
md_create_short_jump (ptr, from_Nddr, to_Nddr, frag, to_symbol)
|
|
char *ptr;
|
|
addressT from_Nddr;
|
|
addressT to_Nddr;
|
|
fragS *frag;
|
|
symbolS *to_symbol;
|
|
{
|
|
as_fatal ("failed sanity check.");
|
|
}
|
|
|
|
void
|
|
md_create_long_jump (ptr, from_Nddr, to_Nddr, frag, to_symbol)
|
|
char *ptr;
|
|
addressT from_Nddr, to_Nddr;
|
|
fragS *frag;
|
|
symbolS *to_symbol;
|
|
{
|
|
as_fatal ("failed sanity check.");
|
|
}
|
|
|
|
|
|
/*
|
|
called after relaxing, change the frags so they know how big they are
|
|
*/
|
|
void
|
|
md_convert_frag (headers, fragP)
|
|
object_headers *headers;
|
|
fragS *fragP;
|
|
|
|
{
|
|
int disp_size = 0;
|
|
int inst_size = 0;
|
|
unsigned char *buffer = (unsigned char *) (fragP->fr_fix + fragP->fr_literal);
|
|
|
|
switch (fragP->fr_subtype)
|
|
{
|
|
case C (COND_BRANCH, BYTE_DISP):
|
|
case C (UNCOND_BRANCH, BYTE_DISP):
|
|
disp_size = 1;
|
|
inst_size = 1;
|
|
break;
|
|
|
|
/* cond branches to a known 16 bit displacement */
|
|
case C (COND_BRANCH, WORD_DISP):
|
|
switch (buffer[0])
|
|
{
|
|
case OP_BCC:
|
|
case OP_BCS:
|
|
case OP_BEQ:
|
|
case OP_BMI:
|
|
case OP_BNE:
|
|
case OP_BPL:
|
|
case OP_BVS:
|
|
case OP_BVC:
|
|
/* Invert the sense of the test */
|
|
buffer[0] ^= 0x20;
|
|
buffer[1] = 3; /* Jump over following brl */
|
|
buffer[2] = OP_BRL;
|
|
buffer[3] = 0;
|
|
buffer[4] = 0;
|
|
disp_size = 2;
|
|
inst_size = 3;
|
|
break;
|
|
default:
|
|
abort ();
|
|
}
|
|
break;
|
|
case C (UNCOND_BRANCH, WORD_DISP):
|
|
/* Unconditional branches to a known 16 bit displacement */
|
|
|
|
switch (buffer[0])
|
|
{
|
|
case OP_BRA:
|
|
buffer[0] = OP_BRL;
|
|
disp_size = 2;
|
|
inst_size = 1;
|
|
break;
|
|
default:
|
|
abort ();
|
|
}
|
|
break;
|
|
/* got to create a branch over a reloc here */
|
|
case C (COND_BRANCH, UNDEF_WORD_DISP):
|
|
buffer[0] ^= 0x20; /* invert test */
|
|
buffer[1] = 3;
|
|
buffer[2] = OP_BRL;
|
|
buffer[3] = 0;
|
|
buffer[4] = 0;
|
|
fix_new (fragP,
|
|
fragP->fr_fix + 3,
|
|
4,
|
|
fragP->fr_symbol,
|
|
fragP->fr_offset,
|
|
0,
|
|
R_W65_PCR16);
|
|
|
|
fragP->fr_fix += disp_size + inst_size;
|
|
fragP->fr_var = 0;
|
|
break;
|
|
case C (UNCOND_BRANCH, UNDEF_WORD_DISP):
|
|
buffer[0] = OP_BRL;
|
|
buffer[1] = 0;
|
|
buffer[2] = 0;
|
|
fix_new (fragP,
|
|
fragP->fr_fix + 1,
|
|
4,
|
|
fragP->fr_symbol,
|
|
fragP->fr_offset,
|
|
0,
|
|
R_W65_PCR16);
|
|
|
|
fragP->fr_fix += disp_size + inst_size;
|
|
fragP->fr_var = 0;
|
|
break;
|
|
default:
|
|
abort ();
|
|
}
|
|
if (inst_size)
|
|
{
|
|
/* Get the address of the end of the instruction */
|
|
int next_inst = fragP->fr_fix + fragP->fr_address + disp_size + inst_size;
|
|
int targ_addr = (S_GET_VALUE (fragP->fr_symbol) +
|
|
fragP->fr_offset);
|
|
int disp = targ_addr - next_inst;
|
|
|
|
md_number_to_chars (buffer + inst_size, disp, disp_size);
|
|
fragP->fr_fix += disp_size + inst_size;
|
|
fragP->fr_var = 0;
|
|
}
|
|
}
|
|
|
|
|
|
valueT
|
|
DEFUN (md_section_align, (seg, size),
|
|
segT seg AND
|
|
valueT size)
|
|
{
|
|
return ((size + (1 << section_alignment[(int) seg]) - 1)
|
|
& (-1 << section_alignment[(int) seg]));
|
|
|
|
}
|
|
|
|
void
|
|
md_apply_fix (fixP, val)
|
|
fixS *fixP;
|
|
long val;
|
|
{
|
|
char *buf = fixP->fx_where + fixP->fx_frag->fr_literal;
|
|
int addr = fixP->fx_frag->fr_address + fixP->fx_where;
|
|
|
|
if (fixP->fx_r_type == 0)
|
|
{
|
|
if (fixP->fx_size == 1)
|
|
fixP->fx_r_type = R_W65_ABS8;
|
|
else
|
|
fixP->fx_r_type = R_W65_ABS16;
|
|
}
|
|
|
|
switch (fixP->fx_r_type)
|
|
{
|
|
case R_W65_ABS8S16:
|
|
val >>= 8;
|
|
case R_W65_ABS8S8:
|
|
val >>= 8;
|
|
case R_W65_ABS8:
|
|
*buf++ = val;
|
|
break;
|
|
case R_W65_ABS16S16:
|
|
val >>= 8;
|
|
case R_W65_ABS16S8:
|
|
val >>= 8;
|
|
case R_W65_ABS16:
|
|
*buf++ = val >> 0;
|
|
*buf++ = val >> 8;
|
|
break;
|
|
case R_W65_ABS24:
|
|
*buf++ = val >> 0;
|
|
*buf++ = val >> 8;
|
|
*buf++ = val >> 16;
|
|
break;
|
|
case R_W65_PCR8:
|
|
*buf++ = val - addr - 1;
|
|
break;
|
|
case R_W65_PCR16:
|
|
val = val - addr - 1;
|
|
*buf++ = val;
|
|
*buf++ = val >> 8;
|
|
break;
|
|
case R_W65_DP:
|
|
*buf++ = val;
|
|
break;
|
|
|
|
default:
|
|
abort ();
|
|
}
|
|
}
|
|
|
|
int md_long_jump_size;
|
|
|
|
/* Put number into target byte order */
|
|
|
|
void
|
|
md_number_to_chars (ptr, use, nbytes)
|
|
char *ptr;
|
|
valueT use;
|
|
int nbytes;
|
|
{
|
|
number_to_chars_littleendian (ptr, use, nbytes);
|
|
}
|
|
|
|
long
|
|
md_pcrel_from (fixP)
|
|
fixS *fixP;
|
|
{
|
|
int gap = fixP->fx_size + fixP->fx_where + fixP->fx_frag->fr_address - 1;
|
|
return gap;
|
|
}
|
|
|
|
void
|
|
tc_coff_symbol_emit_hook (x)
|
|
struct symbol *x;
|
|
{
|
|
}
|
|
|
|
short
|
|
tc_coff_fix2rtype (fix_ptr)
|
|
fixS *fix_ptr;
|
|
{
|
|
return fix_ptr->fx_r_type;
|
|
}
|
|
|
|
void
|
|
tc_reloc_mangle (fix_ptr, intr, base)
|
|
fixS *fix_ptr;
|
|
struct internal_reloc *intr;
|
|
bfd_vma base;
|
|
|
|
{
|
|
symbolS *symbol_ptr;
|
|
|
|
symbol_ptr = fix_ptr->fx_addsy;
|
|
|
|
/* If this relocation is attached to a symbol then it's ok
|
|
to output it */
|
|
if (fix_ptr->fx_r_type == RELOC_32)
|
|
{
|
|
/* cons likes to create reloc32's whatever the size of the reloc..
|
|
*/
|
|
switch (fix_ptr->fx_size)
|
|
{
|
|
case 2:
|
|
intr->r_type = R_IMM16;
|
|
break;
|
|
case 1:
|
|
intr->r_type = R_IMM8;
|
|
break;
|
|
default:
|
|
abort ();
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (fix_ptr->fx_size == 4)
|
|
intr->r_type = R_W65_ABS24;
|
|
else
|
|
intr->r_type = fix_ptr->fx_r_type;
|
|
}
|
|
|
|
intr->r_vaddr = fix_ptr->fx_frag->fr_address + fix_ptr->fx_where + base;
|
|
intr->r_offset = fix_ptr->fx_offset;
|
|
|
|
/* Turn the segment of the symbol into an offset. */
|
|
if (symbol_ptr)
|
|
{
|
|
symbolS *dot;
|
|
|
|
dot = segment_info[S_GET_SEGMENT (symbol_ptr)].dot;
|
|
if (dot)
|
|
{
|
|
intr->r_offset += S_GET_VALUE (symbol_ptr);
|
|
intr->r_symndx = dot->sy_number;
|
|
}
|
|
else
|
|
{
|
|
intr->r_symndx = symbol_ptr->sy_number;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
intr->r_symndx = -1;
|
|
}
|
|
}
|
|
|
|
int
|
|
tc_coff_sizemachdep (frag)
|
|
fragS *frag;
|
|
{
|
|
return md_relax_table[frag->fr_subtype].rlx_length;
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
/*
|
|
called just before address relaxation, return the length
|
|
by which a fragment must grow to reach it's destination
|
|
*/
|
|
int
|
|
md_estimate_size_before_relax (fragP, segment_type)
|
|
register fragS *fragP;
|
|
register segT segment_type;
|
|
{
|
|
int what = GET_WHAT (fragP->fr_subtype);
|
|
|
|
switch (fragP->fr_subtype)
|
|
{
|
|
default:
|
|
abort ();
|
|
case C (COND_BRANCH, UNDEF_BYTE_DISP):
|
|
case C (UNCOND_BRANCH, UNDEF_BYTE_DISP):
|
|
/* used to be a branch to somewhere which was unknown */
|
|
if (S_GET_SEGMENT (fragP->fr_symbol) == segment_type)
|
|
{
|
|
/* Got a symbol and it's defined in this segment, become byte
|
|
sized - maybe it will fix up */
|
|
fragP->fr_subtype = C (what, BYTE_DISP);
|
|
fragP->fr_var = md_relax_table[C (what, BYTE_DISP)].rlx_length;
|
|
}
|
|
else
|
|
{
|
|
/* Its got a segment, but its not ours, so it will always be long */
|
|
fragP->fr_subtype = C (what, UNDEF_WORD_DISP);
|
|
fragP->fr_var = md_relax_table[C (what, WORD_DISP)].rlx_length;
|
|
return md_relax_table[C (what, WORD_DISP)].rlx_length;
|
|
}
|
|
}
|
|
return fragP->fr_var;
|
|
}
|
|
|
|
|
|
|
|
CONST char *md_shortopts = "";
|
|
struct option md_longopts[] = {
|
|
#define OPTION_RELAX (OPTION_MD_BASE)
|
|
{NULL, no_argument, NULL, 0}
|
|
};
|
|
|
|
void
|
|
md_show_usage (stream)
|
|
FILE *stream;
|
|
{
|
|
|
|
}
|
|
|
|
size_t md_longopts_size = sizeof(md_longopts);
|