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NetBSD/gnu/usr.bin/gas/config/tc-m88k.c

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/* m88k.c -- Assembler for the Motorola 88000
Contributed by Devon Bowen of Buffalo University
and Torbjorn Granlund of the Swedish Institute of Computer Science.
Copyright (C) 1989-1992 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, 675 Mass Ave, Cambridge, MA 02139, USA. */
#include "as.h"
#include "opcode/m88k.h"
struct m88k_insn
{
unsigned long opcode;
expressionS exp;
enum reloc_type reloc;
};
#if __STDC__ == 1
static int calcop(struct m88k_opcode *format, char *param, struct m88k_insn *insn);
#else /* not __STDC__ */
static int calcop();
#endif /* not __STDC__ */
char *getval ();
char *get_reg ();
char *get_imm16 ();
char *get_bf ();
char *get_pcr ();
char *get_cmp ();
char *get_cnd ();
char *get_cr ();
char *get_fcr ();
char *get_vec9 ();
struct field_val_assoc
{
char *name;
unsigned val;
};
struct field_val_assoc cr_regs[] =
{
{"PID", 0},
{"PSR", 1},
{"EPSR", 2},
{"SSBR", 3},
{"SXIP", 4},
{"SNIP", 5},
{"SFIP", 6},
{"VBR", 7},
{"DMT0", 8},
{"DMD0", 9},
{"DMA0", 10},
{"DMT1", 11},
{"DMD1", 12},
{"DMA1", 13},
{"DMT2", 14},
{"DMD2", 15},
{"DMA2", 16},
{"SR0", 17},
{"SR1", 18},
{"SR2", 19},
{"SR3", 20},
{NULL, 0},
};
struct field_val_assoc fcr_regs[] =
{
{"FPECR", 0},
{"FPHS1", 1},
{"FPLS1", 2},
{"FPHS2", 3},
{"FPLS2", 4},
{"FPPT", 5},
{"FPRH", 6},
{"FPRL", 7},
{"FPIT", 8},
{"FPSR", 62},
{"FPCR", 63},
{NULL, 0},
};
struct field_val_assoc cmpslot[] =
{
/* Integer Floating point */
{"nc", 0},
{"cp", 1},
{"eq", 2},
{"ne", 3},
{"gt", 4},
{"le", 5},
{"lt", 6},
{"ge", 7},
{"hi", 8}, {"ou", 8},
{"ls", 9}, {"ib", 9},
{"lo", 10}, {"in", 10},
{"hs", 11}, {"ob", 11},
{NULL, 0},
};
struct field_val_assoc cndmsk[] =
{
{"gt0", 1},
{"eq0", 2},
{"ge0", 3},
{"lt0", 12},
{"ne0", 13},
{"le0", 14},
{NULL, 0},
};
extern char *myname;
static struct hash_control *op_hash = NULL;
/* These bits should be turned off in the first address of every segment */
int md_seg_align = 7;
/* This is the number to put at the beginning of the a.out file */
long omagic = OMAGIC;
/* These chars start a comment anywhere in a source file (except inside
another comment */
char comment_chars[] = ";";
/* These chars only start a comment at the beginning of a line. */
char line_comment_chars[] = "#";
/* Chars that can be used to separate mant from exp in floating point nums */
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) */
char FLT_CHARS[] = "dDfF";
extern void float_cons (), cons (), s_globl (), s_line (),
s_space (), s_set (), stringer (), s_lcomm ();
static void s_bss ();
const pseudo_typeS md_pseudo_table[] = {
{"align", s_align_bytes, 0 },
{"def", s_set, 0},
{"dfloat", float_cons, 'd'},
{"ffloat", float_cons, 'f'},
{"global", s_globl, 0},
{"half", cons, 2 },
{"bss", s_bss, 0},
{"string", stringer, 0},
{"word", cons, 4 },
{"zero", s_space, 0},
{0}
};
const int md_reloc_size = 12; /* Size of relocation record */
void
md_begin ()
{
char *retval = NULL;
unsigned int i = 0;
/* initialize hash table */
op_hash = hash_new ();
if (op_hash == NULL)
as_fatal ("Could not initialize hash table");
/* loop until you see the end of the list */
while (*m88k_opcodes[i].name)
{
char *name = m88k_opcodes[i].name;
/* hash each mnemonic and record its position */
retval = hash_insert (op_hash, name, &m88k_opcodes[i]);
if (retval != NULL && *retval != '\0')
as_fatal ("Can't hash instruction '%s':%s",
m88k_opcodes[i].name, retval);
/* skip to next unique mnemonic or end of list */
for (i++; !strcmp (m88k_opcodes[i].name, name); i++)
;
}
}
int
md_parse_option (argP, cntP, vecP)
char **argP;
int *cntP;
char ***vecP;
{
as_warn ("unknown option: -%s", *argP);
return(0);
}
void
md_assemble (op)
char *op;
{
char *param, *thisfrag;
struct m88k_opcode *format;
struct m88k_insn insn;
assert (op);
/* skip over instruction to find parameters */
for (param = op; *param != 0 && !isspace (*param); param++)
;
if (*param != 0)
*param++ = 0;
/* try to find the instruction in the hash table */
if ((format = (struct m88k_opcode *) hash_find (op_hash, op)) == NULL)
{
as_fatal ("Invalid mnemonic '%s'", op);
return;
}
/* try parsing this instruction into insn */
insn.exp.X_add_symbol = 0;
insn.exp.X_subtract_symbol = 0;
insn.exp.X_add_number = 0;
insn.exp.X_seg = 0;
insn.reloc = NO_RELOC;
while (!calcop(format, param, &insn))
{
/* if it doesn't parse try the next instruction */
if (!strcmp (format[0].name, format[1].name))
format++;
else
{
as_fatal ("Parameter syntax error");
return;
}
}
/* grow the current frag and plop in the opcode */
thisfrag = frag_more (4);
md_number_to_chars (thisfrag, insn.opcode, 4);
/* if this instruction requires labels mark it for later */
switch (insn.reloc)
{
case NO_RELOC:
break;
case RELOC_LO16:
case RELOC_HI16:
fix_new (frag_now,
thisfrag - frag_now->fr_literal + 2,
2,
insn.exp.X_add_symbol,
insn.exp.X_subtract_symbol,
insn.exp.X_add_number,
0,
insn.reloc);
break;
case RELOC_IW16:
fix_new (frag_now,
thisfrag - frag_now->fr_literal,
4,
insn.exp.X_add_symbol,
insn.exp.X_subtract_symbol,
insn.exp.X_add_number,
0,
insn.reloc);
break;
case RELOC_PC16:
fix_new (frag_now,
thisfrag - frag_now->fr_literal + 2,
2,
insn.exp.X_add_symbol,
insn.exp.X_subtract_symbol,
insn.exp.X_add_number,
1,
insn.reloc);
break;
case RELOC_PC26:
fix_new (frag_now,
thisfrag - frag_now->fr_literal,
4,
insn.exp.X_add_symbol,
insn.exp.X_subtract_symbol,
insn.exp.X_add_number,
1,
insn.reloc);
break;
default:
as_fatal ("Unknown relocation type");
break;
}
}
int
calcop (format, param, insn)
struct m88k_opcode *format;
char *param;
struct m88k_insn *insn;
{
char *fmt = format->op_spec;
int f;
unsigned val;
unsigned opcode;
insn->opcode = format->opcode;
opcode = 0;
for (;;)
{
if (param == 0)
return 0;
f = *fmt++;
switch (f)
{
case 0:
insn->opcode |= opcode;
return *param == 0;
default:
if (f != *param++)
return 0;
break;
case 'd':
param = get_reg (param, &val);
opcode |= val << 21;
break;
case '1':
param = get_reg (param, &val);
opcode |= val << 16;
break;
case '2':
param = get_reg (param, &val);
opcode |= val;
break;
case '3':
param = get_reg (param, &val);
opcode |= (val << 16) | val;
break;
case 'I':
param = get_imm16 (param, insn);
break;
case 'b':
param = get_bf (param, &val);
opcode |= val;
break;
case 'p':
param = get_pcr (param, insn, RELOC_PC16);
break;
case 'P':
param = get_pcr (param, insn, RELOC_PC26);
break;
case 'B':
param = get_cmp (param, &val);
opcode |= val;
break;
case 'M':
param = get_cnd (param, &val);
opcode |= val;
break;
case 'c':
param = get_cr (param, &val);
opcode |= val << 5;
break;
case 'f':
param = get_fcr (param, &val);
opcode |= val << 5;
break;
case 'V':
param = get_vec9 (param, &val);
opcode |= val;
break;
case '?':
/* Having this here repeats the warning somtimes.
But can't we stand that? */
as_warn ("Use of obsolete instruction");
break;
}
}
}
char *
match_name (param, assoc_tab, valp)
char *param;
struct field_val_assoc *assoc_tab;
unsigned *valp;
{
int i;
char *name;
int name_len;
for (i = 0;; i++)
{
name = assoc_tab[i].name;
if (name == NULL)
return NULL;
name_len = strlen (name);
if (!strncmp (param, name, name_len))
{
*valp = assoc_tab[i].val;
return param + name_len;
}
}
}
char *
get_reg (param, regnop)
char *param;
unsigned *regnop;
{
unsigned c;
unsigned regno;
c = *param++;
if (c == 'r')
{
regno = *param++ - '0';
if (regno < 10)
{
if (regno == 0)
{
*regnop = 0;
return param;
}
c = *param - '0';
if (c < 10)
{
regno = regno * 10 + c;
if (c < 32)
{
*regnop = regno;
return param + 1;
}
}
else
{
*regnop = regno;
return param;
}
}
return NULL;
}
else if (c == 's' && param[0] == 'p')
{
*regnop = 31;
return param + 1;
}
return 0;
}
char *
get_imm16 (param, insn)
char *param;
struct m88k_insn *insn;
{
enum reloc_type reloc = NO_RELOC;
unsigned int val;
segT seg;
char *save_ptr;
if (!strncmp (param, "hi16", 4) && !isalnum (param[4]))
{
reloc = RELOC_HI16;
param += 4;
}
else if (!strncmp (param, "lo16", 4) && !isalnum (param[4]))
{
reloc = RELOC_LO16;
param += 4;
}
else if (!strncmp (param, "iw16", 4) && !isalnum (param[4]))
{
reloc = RELOC_IW16;
param += 4;
}
save_ptr = input_line_pointer;
input_line_pointer = param;
seg = expression (&insn->exp);
param = input_line_pointer;
input_line_pointer = save_ptr;
val = insn->exp.X_add_number;
if (seg == SEG_ABSOLUTE)
{
/* Insert the value now, and reset reloc to NO_RELOC. */
if (reloc == NO_RELOC)
{
/* Warn about too big expressions if not surrounded by xx16. */
if (val > 0xffff)
as_warn ("Expression truncated to 16 bits");
}
if (reloc == RELOC_HI16)
val >>= 16;
insn->opcode |= val & 0xffff;
reloc = NO_RELOC;
}
else if (reloc == NO_RELOC)
/* We accept a symbol even without lo16, hi16, etc, and assume
lo16 was intended. */
reloc = RELOC_LO16;
insn->reloc = reloc;
return param;
}
char *
get_pcr (param, insn, reloc)
char *param;
struct m88k_insn *insn;
enum reloc_type reloc;
{
char *saveptr, *saveparam;
segT seg;
saveptr = input_line_pointer;
input_line_pointer = param;
seg = expression (&insn->exp);
saveparam = input_line_pointer;
input_line_pointer = saveptr;
/* Botch: We should relocate now if SEG_ABSOLUTE. */
insn->reloc = reloc;
return saveparam;
}
char *
get_cmp (param, valp)
char *param;
unsigned *valp;
{
unsigned int val;
char *save_ptr;
save_ptr = param;
param = match_name (param, cmpslot, valp);
val = *valp;
if (param == NULL)
{
param = save_ptr;
save_ptr = input_line_pointer;
input_line_pointer = param;
val = get_absolute_expression ();
param = input_line_pointer;
input_line_pointer = save_ptr;
if (val >= 32)
{
as_warn ("Expression truncated to 5 bits");
val %= 32;
}
}
*valp = val << 21;
return param;
}
char *
get_cnd (param, valp)
char *param;
unsigned *valp;
{
unsigned int val;
if (isdigit (*param))
{
param = getval (param, &val);
if (val >= 32)
{
as_warn ("Expression truncated to 5 bits");
val %= 32;
}
}
else
{
if (isupper (*param))
*param = tolower (*param);
if (isupper (param[1]))
param[1] = tolower (param[1]);
param = match_name (param, cndmsk, valp);
if (param == NULL)
return NULL;
val = *valp;
}
*valp = val << 21;
return param;
}
char *
get_bf2 (param, bc)
char *param;
int bc;
{
int depth = 0;
int c;
for (;;)
{
c = *param;
if (c == 0)
return param;
else if (c == '(')
depth++;
else if (c == ')')
depth--;
else if (c == bc && depth <= 0)
return param;
param++;
}
}
char *
get_bf_offset_expression (param, offsetp)
char *param;
unsigned *offsetp;
{
unsigned offset;
if (isalpha (param[0]))
{
if (isupper (param[0]))
param[0] = tolower (param[0]);
if (isupper (param[1]))
param[1] = tolower (param[1]);
param = match_name (param, cmpslot, offsetp);
return param;
}
else
{
input_line_pointer = param;
offset = get_absolute_expression ();
param = input_line_pointer;
}
*offsetp = offset;
return param;
}
char *
get_bf (param, valp)
char *param;
unsigned *valp;
{
unsigned offset = 0;
unsigned width = 0;
char *xp;
char *save_ptr;
xp = get_bf2 (param, '<');
save_ptr = input_line_pointer;
input_line_pointer = param;
if (*xp == 0)
{
/* We did not find '<'. We have an offset (width implicitly 32). */
param = get_bf_offset_expression (param, &offset);
if (param == NULL)
return NULL;
input_line_pointer = save_ptr;
}
else
{
*xp++ = 0; /* Overwrite the '<' */
param = get_bf2 (xp, '>');
if (*param == 0)
return NULL;
*param++ = 0; /* Overwrite the '>' */
width = get_absolute_expression ();
xp = get_bf_offset_expression (xp, &offset);
input_line_pointer = save_ptr;
if (xp + 1 != param)
return NULL;
}
*valp = ((width % 32) << 5) | (offset % 32);
return param;
}
char *
get_cr (param, regnop)
char *param;
unsigned *regnop;
{
unsigned regno;
unsigned c;
/* int i; FIXME remove this */
/* int name_len; FIXME remove this */
if (!strncmp (param, "cr", 2))
{
param += 2;
regno = *param++ - '0';
if (regno < 10)
{
if (regno == 0)
{
*regnop = 0;
return param;
}
c = *param - '0';
if (c < 10)
{
regno = regno * 10 + c;
if (c < 64)
{
*regnop = regno;
return param + 1;
}
}
else
{
*regnop = regno;
return param;
}
}
return NULL;
}
param = match_name (param, cr_regs, regnop);
return param;
}
char *
get_fcr (param, regnop)
char *param;
unsigned *regnop;
{
unsigned regno;
unsigned c;
/* int i; FIXME remove this */
/* int name_len; FIXME: remove this */
if (!strncmp (param, "fcr", 3))
{
param += 3;
regno = *param++ - '0';
if (regno < 10)
{
if (regno == 0)
{
*regnop = 0;
return param;
}
c = *param - '0';
if (c < 10)
{
regno = regno * 10 + c;
if (c < 64)
{
*regnop = regno;
return param + 1;
}
}
else
{
*regnop = regno;
return param;
}
}
return NULL;
}
param = match_name (param, fcr_regs, regnop);
return param;
}
char *
get_vec9 (param, valp)
char *param;
unsigned *valp;
{
unsigned val;
char *save_ptr;
save_ptr = input_line_pointer;
input_line_pointer = param;
val = get_absolute_expression ();
param = input_line_pointer;
input_line_pointer = save_ptr;
if (val >= 1 << 9)
as_warn ("Expression truncated to 9 bits");
*valp = val % (1 << 9);
return param;
}
#define hexval(z) \
(isdigit (z) ? (z) - '0' : \
islower (z) ? (z) - 'a' + 10 : \
isupper (z) ? (z) - 'A' + 10 : -1)
char *
getval (param, valp)
char *param;
unsigned int *valp;
{
unsigned int val = 0;
unsigned int c;
c = *param++;
if (c == '0')
{
c = *param++;
if (c == 'x' || c == 'X')
{
c = *param++;
c = hexval (c);
while (c < 16)
{
val = val * 16 + c;
c = *param++;
c = hexval (c);
}
}
else
{
c -= '0';
while (c < 8)
{
val = val * 8 + c;
c = *param++ - '0';
}
}
}
else
{
c -= '0';
while (c < 10)
{
val = val * 10 + c;
c = *param++ - '0';
}
}
*valp = val;
return param - 1;
}
void
md_number_to_chars (buf, val, nbytes)
char *buf;
long val;
int nbytes;
{
switch (nbytes)
{
case 4:
*buf++ = val >> 24;
*buf++ = val >> 16;
case 2:
*buf++ = val >> 8;
case 1:
*buf = val;
break;
default:
abort ();
}
}
#ifdef comment
void
md_number_to_imm (buf, val, nbytes, fixP, seg_type)
unsigned char *buf;
unsigned int val;
int nbytes;
fixS *fixP;
int seg_type;
{
if (seg_type != N_TEXT || fixP->fx_r_type == NO_RELOC)
{
switch (nbytes)
{
case 4:
*buf++ = val >> 24;
*buf++ = val >> 16;
case 2:
*buf++ = val >> 8;
case 1:
*buf = val;
break;
default:
abort ();
}
return;
}
switch (fixP->fx_r_type)
{
case RELOC_IW16:
buf[2] = val >> 8;
buf[3] = val;
break;
case RELOC_LO16:
buf[0] = val >> 8;
buf[1] = val;
break;
case RELOC_HI16:
buf[0] = val >> 24;
buf[1] = val >> 16;
break;
case RELOC_PC16:
val += 4;
buf[0] = val >> 10;
buf[1] = val >> 2;
break;
case RELOC_PC26:
val += 4;
buf[0] |= (val >> 26) & 0x03;
buf[1] = val >> 18;
buf[2] = val >> 10;
buf[3] = val >> 2;
break;
case RELOC_32:
buf[0] = val >> 24;
buf[1] = val >> 16;
buf[2] = val >> 8;
buf[3] = val;
break;
default:
as_fatal ("Bad relocation type");
break;
}
}
#endif /* comment */
/* Apply a fixS to the frags, now that we know the value it ought to
hold. */
void md_apply_fix(fixP, val)
fixS *fixP;
long val;
{
char *buf = fixP->fx_where + fixP->fx_frag->fr_literal;
fixP->fx_addnumber = val;
switch (fixP->fx_r_type) {
case RELOC_IW16:
buf[2] = val >> 8;
buf[3] = val;
break;
case RELOC_LO16:
buf[0] = val >> 8;
buf[1] = val;
break;
case RELOC_HI16:
buf[0] = val >> 24;
buf[1] = val >> 16;
break;
case RELOC_PC16:
val += 4;
buf[0] = val >> 10;
buf[1] = val >> 2;
break;
case RELOC_PC26:
val += 4;
buf[0] |= (val >> 26) & 0x03;
buf[1] = val >> 18;
buf[2] = val >> 10;
buf[3] = val >> 2;
break;
case RELOC_32:
buf[0] = val >> 24;
buf[1] = val >> 16;
buf[2] = val >> 8;
buf[3] = val;
break;
case NO_RELOC:
switch (fixP->fx_size) {
case 4:
*buf++ = val >> 24;
*buf++ = val >> 16;
case 2:
*buf++ = val >> 8;
case 1:
*buf = val;
break;
default:
abort ();
}
default:
as_bad("bad relocation type: 0x%02x", fixP->fx_r_type);
break;
}
return;
} /* md_apply_fix() */
void
md_number_to_disp (buf, val, nbytes)
char *buf;
int val;
int nbytes;
{
as_fatal ("md_number_to_disp not defined");
md_number_to_chars (buf, val, nbytes);
}
void
md_number_to_field (buf, val, nbytes)
char *buf;
int val;
int nbytes;
{
as_fatal ("md_number_to_field not defined");
md_number_to_chars (buf, val, nbytes);
}
#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_ATOF()";
}
t=atof_ieee (input_line_pointer, type, words);
if (t)
input_line_pointer=t;
*sizeP=prec * sizeof (LITTLENUM_TYPE);
for (wordP=words;prec--;)
{
md_number_to_chars (litP, (long) (*wordP++), sizeof (LITTLENUM_TYPE));
litP+=sizeof (LITTLENUM_TYPE);
}
return ""; /* Someone should teach Dean about null pointers */
}
int md_short_jump_size = 4;
void
md_create_short_jump (ptr, from_addr, to_addr, frag, to_symbol)
char *ptr;
long from_addr, to_addr;
fragS *frag;
symbolS *to_symbol;
{
ptr[0] = 0xc0; ptr[1] = 0x00; ptr[2] = 0x00; ptr[3] = 0x00;
fix_new (frag,
ptr - frag->fr_literal,
4,
to_symbol,
(symbolS *) 0,
(long int) 0,
0,
RELOC_PC26); /* Botch: Shouldn't this be RELOC_PC16? */
}
int md_long_jump_size = 4;
void
md_create_long_jump (ptr, from_addr, to_addr, frag, to_symbol)
char *ptr;
long from_addr, to_addr;
fragS *frag;
symbolS *to_symbol;
{
ptr[0] = 0xc0; ptr[1] = 0x00; ptr[2] = 0x00; ptr[3] = 0x00;
fix_new (frag,
ptr - frag->fr_literal,
4,
to_symbol,
(symbolS *) 0,
(long int) 0,
0,
RELOC_PC26);
}
int
md_estimate_size_before_relax (fragP, segment_type)
fragS *fragP;
segT segment_type;
{
as_fatal("Relaxation should never occur");
return(0);
}
const relax_typeS md_relax_table[] = {0};
void
md_convert_frag (headers, fragP)
object_headers *headers;
fragS *fragP;
{
as_fatal ("Relaxation should never occur");
}
void
md_end ()
{
}
#ifdef comment
/*
* Risc relocations are completely different, so it needs
* this machine dependent routine to emit them.
*/
void
emit_relocations (fixP, segment_address_in_file)
fixS *fixP;
relax_addressT segment_address_in_file;
{
struct reloc_info_m88k ri;
symbolS *symbolP;
extern char *next_object_file_charP;
bzero ((char *) &ri, sizeof (ri));
for (; fixP; fixP = fixP->fx_next) {
if (fixP->fx_r_type >= NO_RELOC) {
fprintf (stderr, "fixP->fx_r_type = %d\n", fixP->fx_r_type);
abort ();
}
if ((symbolP = fixP->fx_addsy) != NULL) {
ri.r_address = fixP->fx_frag->fr_address +
fixP->fx_where - segment_address_in_file;
if ((symbolP->sy_type & N_TYPE) == N_UNDF) {
ri.r_extern = 1;
ri.r_symbolnum = symbolP->sy_number;
} else {
ri.r_extern = 0;
ri.r_symbolnum = symbolP->sy_type & N_TYPE;
}
if (symbolP && symbolP->sy_frag) {
ri.r_addend = symbolP->sy_frag->fr_address;
}
ri.r_type = fixP->fx_r_type;
if (fixP->fx_pcrel) {
/* ri.r_addend -= fixP->fx_where; */
ri.r_addend -= ri.r_address;
} else {
ri.r_addend = fixP->fx_addnumber;
}
/* md_ri_to_chars ((char *) &ri, ri); */
append (&next_object_file_charP, (char *)& ri, sizeof (ri));
}
}
return;
}
#endif /* comment */
/* Translate internal representation of relocation info to target format.
On m88k: first 4 bytes are normal unsigned long address,
next three bytes are index, most sig. byte first.
Byte 7 is broken up with bit 7 as external,
bits 6, 5, & 4 unused, and the lower four bits as relocation
type.
Next 4 bytes are long addend. */
void tc_aout_fix_to_chars(where, fixP, segment_address_in_file)
char *where;
fixS *fixP;
relax_addressT segment_address_in_file;
{
long r_index;
long r_extern;
long r_addend = 0;
long r_address;
know(fixP->fx_addsy);
if (!S_IS_DEFINED(fixP->fx_addsy)) {
r_extern = 1;
r_index = fixP->fx_addsy->sy_number;
} else {
r_extern = 0;
r_index = S_GET_TYPE(fixP->fx_addsy);
}
/* this is easy */
md_number_to_chars(where,
r_address = fixP->fx_frag->fr_address + fixP->fx_where - segment_address_in_file,
4);
/* now the fun stuff */
where[4] = (r_index >> 16) & 0x0ff;
where[5] = (r_index >> 8) & 0x0ff;
where[6] = r_index & 0x0ff;
where[7] = ((r_extern << 7) & 0x80) | (0 & 0x70) | (fixP->fx_r_type & 0xf);
/* Also easy */
if (fixP->fx_addsy->sy_frag) {
r_addend = fixP->fx_addsy->sy_frag->fr_address;
}
if (fixP->fx_pcrel) {
r_addend -= r_address;
} else {
r_addend = fixP->fx_addnumber;
}
md_number_to_chars(&where[8], r_addend, 4);
return;
} /* tc_aout_fix_to_chars() */
static void
s_bss()
{
char *name;
char c;
char *p;
int temp, bss_align = 1;
symbolS *symbolP;
extern char is_end_of_line[256];
name = input_line_pointer;
c = get_symbol_end();
p = input_line_pointer;
*p = c;
SKIP_WHITESPACE();
if ( * input_line_pointer != ',' )
{
as_warn("Expected comma after name");
ignore_rest_of_line();
return;
}
input_line_pointer ++;
if ((temp = get_absolute_expression()) < 0)
{
as_warn("BSS length (%d.) <0! Ignored.", temp);
ignore_rest_of_line();
return;
}
*p = 0;
symbolP = symbol_find_or_make(name);
*p = c;
if (*input_line_pointer == ',')
{
input_line_pointer++;
bss_align = get_absolute_expression();
while (local_bss_counter % bss_align != 0)
local_bss_counter++;
}
if (!S_IS_DEFINED(symbolP)
|| (S_GET_SEGMENT(symbolP) == SEG_BSS
&& S_GET_VALUE(symbolP) == local_bss_counter)) {
S_SET_VALUE(symbolP, local_bss_counter);
S_SET_SEGMENT(symbolP, SEG_BSS);
symbolP->sy_frag = &bss_address_frag;
local_bss_counter += temp;
} else {
as_warn( "Ignoring attempt to re-define symbol from %d. to %d.",
S_GET_VALUE(symbolP), local_bss_counter );
}
while (!is_end_of_line[*input_line_pointer])
{
input_line_pointer++;
}
return;
}
/* We have no need to default values of symbols. */
/* ARGSUSED */
symbolS *md_undefined_symbol(name)
char *name;
{
return 0;
} /* md_undefined_symbol() */
/* Parse an operand that is machine-specific.
We just return without modifying the expression if we have nothing
to do. */
/* ARGSUSED */
void md_operand(expressionP)
expressionS *expressionP;
{
} /* md_operand() */
/* Round up a section size to the appropriate boundary. */
long md_section_align(segment, size)
segT segment;
long size;
{
return((size + 7) & ~7); /* Round all sects to multiple of 8 */
} /* md_section_align() */
/* Exactly what point is a PC-relative offset relative TO?
On the sparc, they're relative to the address of the offset, plus
its size. This gets us to the following instruction.
(??? Is this right? FIXME-SOON) */
long md_pcrel_from(fixP)
fixS *fixP;
{
return(fixP->fx_size + fixP->fx_where + fixP->fx_frag->fr_address);
} /* md_pcrel_from() */
/* end of tc-m88k.c */
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