/* tc-w65.c -- Assemble code for the W65816
- Copyright (C) 1995, 1998 Free Software Foundation.
+ Copyright 1995, 1998, 2000, 2001, 2002, 2005
+ Free Software Foundation, Inc.
This file is part of GAS, the GNU Assembler.
Software Foundation, 59 Temple Place - Suite 330, Boston, MA
02111-1307, USA. */
-/*
- Written By Steve Chamberlain
- sac@cygnus.com
- */
+/* Written By Steve Chamberlain <sac@cygnus.com>. */
#include <stdio.h>
#include "as.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_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
- */
+ Integer arg to pass to the function */
#define OP_BCC 0x90
#define OP_BCS 0xB0
#define OP_BVC 0x50
#define OP_BVS 0x70
-void s_longa ();
-const pseudo_typeS md_pseudo_table[] =
-{
+static void s_longa PARAMS ((int));
+static char *parse_exp PARAMS ((char *));
+static char *get_operands PARAMS ((const struct opinfo *, char *));
+static const struct opinfo *get_specific PARAMS ((const struct opinfo *));
+static void build_Mytes PARAMS ((const struct opinfo *));
+
+
+const pseudo_typeS md_pseudo_table[] = {
{"int", cons, 2},
{"word", cons, 2},
{"longa", s_longa, 0},
{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 */
+/* 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 */
+/* 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 WORD_F 32767
#define WORD_B 32768
-relax_typeS md_relax_table[C (END, 0)];
+relax_typeS md_relax_table[C (END, 0)] = {
+ { 0, 0, 0, 0 },
+ { 0, 0, 0, 0 },
+ { 0, 0, 0, 0 },
+ { 0, 0, 0, 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
- */
+ /* 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 */
-void
+};
+
+/* 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. */
+
+static void
s_longa (xmode)
+ int xmode;
{
int *p = xmode ? &X : &M;
while (*input_line_pointer == ' ')
as_bad (_("need on or off."));
demand_empty_rest_of_line ();
}
+
void
md_begin ()
{
- relax_typeS *table;
- struct opinfo *opcode;
+ const struct opinfo *opcode;
char *prev_name = "";
opcode_hash_control = hash_new ();
- /* Insert unique names into hash table */
+ /* 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)
+w65_expression (dest)
expressionS *dest;
- unsigned int bytes;
{
expr_size = 0;
expr_shift = 0;
}
int amode;
-static
-char *
-parse_exp (s, bytes)
+
+static char *
+parse_exp (s)
char *s;
- int bytes;
{
char *save;
char *new;
save = input_line_pointer;
input_line_pointer = s;
- w65_expression (&immediate, bytes);
+ w65_expression (&immediate);
if (immediate.X_op == O_absent)
as_bad (_("missing operand"));
new = input_line_pointer;
return new;
}
-
-static
-char *
+static char *
get_operands (info, ptr)
- struct opinfo *info;
+ const struct opinfo *info;
char *ptr;
{
register int override_len = 0;
register int bytes = 0;
+
while (*ptr == ' ')
ptr++;
bytes = 2;
}
}
- else if (ptr[0] == 's' && ptr[1] == ')' && ptr[2] == ',' && ptr[3] == 'y')
+ else if (ptr[0] == 's' && ptr[1] == ')'
+ && ptr[2] == ',' && ptr[3] == 'y')
{
amode = ADDR_STACK_REL_INDX_IDX;
bytes = 1;
}
}
-
}
else if (ptr[0] == '[')
{
}
else
{
- if (info->code == O_jmp)
+ if (info->code == O_jmp)
{
- bytes = 2;
- amode = ADDR_ABS_IND_LONG;
- }
- else
-{
- bytes = 1;
-
- amode = ADDR_DIR_IND_LONG;
- }
+ bytes = 2;
+ amode = ADDR_ABS_IND_LONG;
+ }
+ else
+ {
+ bytes = 1;
+ amode = ADDR_DIR_IND_LONG;
+ }
}
}
}
else
{
- ptr = parse_exp (ptr, 2);
+ ptr = parse_exp (ptr);
if (ptr[0] == ',')
{
if (ptr[1] == 'y')
{
case 0:
if (amode == ADDR_DIR)
- tc_cons_reloc = R_W65_DP;
+ tc_cons_reloc = R_W65_DP;
else
-tc_cons_reloc = R_W65_ABS8;
+ tc_cons_reloc = R_W65_ABS8;
break;
case 1:
tc_cons_reloc = R_W65_ABS8S8;
/* Passed a pointer to a list of opcodes which use different
addressing modes, return the opcode which matches the opcodes
- provided
- */
+ provided. */
-static
-struct opinfo *
+static const struct opinfo *
get_specific (opcode)
- struct opinfo *opcode;
+ const struct opinfo *opcode;
{
int ocode = opcode->code;
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. */
-/* Now we know what sort of opcodes it is, lets build the bytes -
- */
static void
build_Mytes (opcode)
- struct opinfo *opcode;
+ const struct opinfo *opcode;
{
int size;
int type;
else if (opcode->amode == ADDR_PC_REL)
{
int type;
- /* This is a relaxable insn, so we do some special handling */
+
+ /* 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,
switch (opcode->amode)
{
GETINFO (size, type, pcrel);
+ default:
+ abort ();
}
- /* If something special was done in the
- expression modify the reloc type */
+ /* If something special was done in the expression modify the
+ reloc type. */
if (tc_cons_reloc)
- {
- type = tc_cons_reloc;
- }
-
-
+ type = tc_cons_reloc;
- /* 1 byte for the opcode + the bytes for the addrmode */
+ /* 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 */
+ /* Two relocs for this one. */
fix_new_exp (frag_now,
output + 1 - frag_now->fr_literal,
1,
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.
- */
+/* 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;
+ const struct opinfo *opcode;
char name[20];
- int nlen = 0;
- char *p;
/* Drop leading whitespace */
while (*str == ' ')
if (opcode == 0)
{
- /* Couldn't find an opcode which matched the operands */
-
+ /* Couldn't find an opcode which matched the operands. */
char *where = frag_more (1);
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)
+md_undefined_symbol (name)
+ char *name ATTRIBUTE_UNUSED;
{
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 */
+/* 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.
- */
+/* 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;
LITTLENUM_TYPE words[MAX_LITTLENUMS];
LITTLENUM_TYPE *wordP;
char *t;
- char *atof_ieee ();
switch (type)
{
}
int
-md_parse_option (c,a)
- int c;
- char *a;
-
+md_parse_option (c, a)
+ int c ATTRIBUTE_UNUSED;
+ char *a ATTRIBUTE_UNUSED;
{
- return 1;
+ 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. */
-/*
-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;
+ object_headers *headers ATTRIBUTE_UNUSED;
+ segT seg ATTRIBUTE_UNUSED;
fragS *fragP;
{
int disp_size = 0;
int inst_size = 0;
- unsigned char *buffer = (unsigned char *) (fragP->fr_fix + fragP->fr_literal);
+ unsigned char *buffer =
+ (unsigned char *) (fragP->fr_fix + fragP->fr_literal);
switch (fragP->fr_subtype)
{
inst_size = 1;
break;
- /* cond branches to a known 16 bit displacement */
+ /* Conditional branches to a known 16 bit displacement. */
case C (COND_BRANCH, WORD_DISP):
switch (buffer[0])
{
}
break;
case C (UNCOND_BRANCH, WORD_DISP):
- /* Unconditional branches to a known 16 bit displacement */
+ /* Unconditional branches to a known 16 bit displacement. */
switch (buffer[0])
{
abort ();
}
break;
- /* got to create a branch over a reloc here */
+ /* Got to create a branch over a reloc here. */
case C (COND_BRANCH, UNDEF_WORD_DISP):
buffer[0] ^= 0x20; /* invert test */
buffer[1] = 3;
}
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;
+ /* 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);
+ md_number_to_chars ((char *) 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)
+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_fix (fixP, val)
+md_apply_fix3 (fixP, valP, seg)
fixS *fixP;
- long val;
+ 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;
default:
abort ();
}
+
+ if (fixP->fx_addsy == NULL && fixP->fx_pcrel == 0)
+ fixP->fx_done = 1;
}
-/* Put number into target byte order */
+/* Put number into target byte order. */
void
md_number_to_chars (ptr, use, nbytes)
void
tc_coff_symbol_emit_hook (x)
- struct symbol *x;
+ symbolS *x ATTRIBUTE_UNUSED;
{
}
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. */
-
-
-
-/*
-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);
+ int what;
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 */
+ 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 */
+ 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 */
+ /* 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;
}
+ 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 = "";
+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;
+ FILE *stream ATTRIBUTE_UNUSED;
{
-
}
-size_t md_longopts_size = sizeof(md_longopts);
+size_t md_longopts_size = sizeof (md_longopts);
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