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binutils-gdb/gas/config/tc-w65.c
Alan Modra a2199cc1ea * config/tc-w65.c (md_section_align): Fix typo. 
(md_parse_option): Return 0, not 1.
2002-08-26 08:55:33 +00:00

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/* tc-w65.c -- Assemble code for the W65816
Copyright 1995, 1998, 2000, 2001, 2002 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. */
/* 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"
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 ();
#if 0
int md_reloc_size;
#endif
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";
/* Opcode mnemonics */
static struct hash_control *opcode_hash_control;
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)] = {
{ 0, 0, 0, 0 },
{ 0, 0, 0, 0 },
{ 0, 0, 0, 0 },
{ 0, 0, 0, 0 },
/* COND_BRANCH */
{ 0, 0, 0, 0 }, /* UNDEF_BYTE_DISP */
{ BYTE_F, BYTE_B, 2, C (COND_BRANCH, WORD_DISP) }, /* BYTE_DISP */
{ WORD_F, WORD_B, 5, 0 }, /* WORD_DISP */
{ 0, 0, 5, 0 }, /* UNDEF_WORD_DISP */
/* UNCOND_BRANCH */
{ 0, 0, 0, 0 }, /* UNDEF_BYTE_DISP */
{ BYTE_F, BYTE_B, 2, C (UNCOND_BRANCH, WORD_DISP) }, /* BYTE_DISP */
{ WORD_F, WORD_B, 3, 0 }, /* WORD_DISP */
{ 0, 0, 3, 0 } /* UNDEF_WORD_DISP */
};
/* 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 ()
{
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;
}
}
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, let's 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
tc_crawl_symbol_chain (headers)
object_headers *headers;
{
printf (_("call to tc_crawl_symbol_chain \n"));
}
symbolS *
md_undefined_symbol (name)
char *name;
{
return 0;
}
void
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 0;
}
void
tc_Nout_fix_to_chars ()
{
printf (_("call to tc_Nout_fix_to_chars \n"));
abort ();
}
/* Called after relaxing, change the frags so they know how big they
are. */
void
md_convert_frag (headers, seg, fragP)
object_headers *headers;
segT seg;
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;
/* Conditional 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
md_section_align (seg, size)
segT seg;
valueT size;
{
return ((size + (1 << section_alignment[(int) seg]) - 1)
& (-1 << section_alignment[(int) seg]));
}
void
md_apply_fix3 (fixP, valP, seg)
fixS *fixP;
valueT * valP;
segT seg ATTRIBUTE_UNUSED;
{
long val = * (long *) valP;
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 ();
}
if (fixP->fx_addsy == NULL && fixP->fx_pcrel == 0)
fixP->fx_done = 1;
}
/* 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)
symbolS *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;
switch (fragP->fr_subtype)
{
default:
abort ();
case C (COND_BRANCH, UNDEF_BYTE_DISP):
case C (UNCOND_BRANCH, UNDEF_BYTE_DISP):
what = GET_WHAT (fragP->fr_subtype);
/* 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);
}
else
{
/* Its got a segment, but its not ours, so it will always be
long. */
fragP->fr_subtype = C (what, UNDEF_WORD_DISP);
}
break;
case C (COND_BRANCH, BYTE_DISP):
case C (COND_BRANCH, WORD_DISP):
case C (COND_BRANCH, UNDEF_WORD_DISP):
case C (UNCOND_BRANCH, BYTE_DISP):
case C (UNCOND_BRANCH, WORD_DISP):
case C (UNCOND_BRANCH, UNDEF_WORD_DISP):
/* When relaxing a section for the second time, we don't need to
do anything besides return the current size. */
break;
}
fragP->fr_var = md_relax_table[fragP->fr_subtype].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);
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