mirror of
https://github.com/autc04/Retro68.git
synced 2024-09-10 03:54:48 +00:00
604 lines
16 KiB
C
604 lines
16 KiB
C
|
/* tc-xstormy16.c -- Assembler for the Sanyo XSTORMY16.
|
|||
|
Copyright 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2009
|
|||
|
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 3, 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, 51 Franklin Street - Fifth Floor,
|
|||
|
Boston, MA 02110-1301, USA. */
|
|||
|
|
|||
|
#include "as.h"
|
|||
|
#include "subsegs.h"
|
|||
|
#include "symcat.h"
|
|||
|
#include "opcodes/xstormy16-desc.h"
|
|||
|
#include "opcodes/xstormy16-opc.h"
|
|||
|
#include "cgen.h"
|
|||
|
|
|||
|
/* Structure to hold all of the different components describing
|
|||
|
an individual instruction. */
|
|||
|
typedef struct
|
|||
|
{
|
|||
|
const CGEN_INSN * insn;
|
|||
|
const CGEN_INSN * orig_insn;
|
|||
|
CGEN_FIELDS fields;
|
|||
|
#if CGEN_INT_INSN_P
|
|||
|
CGEN_INSN_INT buffer [1];
|
|||
|
#define INSN_VALUE(buf) (*(buf))
|
|||
|
#else
|
|||
|
unsigned char buffer [CGEN_MAX_INSN_SIZE];
|
|||
|
#define INSN_VALUE(buf) (buf)
|
|||
|
#endif
|
|||
|
char * addr;
|
|||
|
fragS * frag;
|
|||
|
int num_fixups;
|
|||
|
fixS * fixups [GAS_CGEN_MAX_FIXUPS];
|
|||
|
int indices [MAX_OPERAND_INSTANCES];
|
|||
|
}
|
|||
|
xstormy16_insn;
|
|||
|
|
|||
|
const char comment_chars[] = ";";
|
|||
|
const char line_comment_chars[] = "#";
|
|||
|
const char line_separator_chars[] = "|";
|
|||
|
const char EXP_CHARS[] = "eE";
|
|||
|
const char FLT_CHARS[] = "dD";
|
|||
|
|
|||
|
#define O_fptr_symbol (O_max + 1)
|
|||
|
|
|||
|
#define XSTORMY16_SHORTOPTS ""
|
|||
|
const char * md_shortopts = XSTORMY16_SHORTOPTS;
|
|||
|
|
|||
|
struct option md_longopts[] =
|
|||
|
{
|
|||
|
{NULL, no_argument, NULL, 0}
|
|||
|
};
|
|||
|
size_t md_longopts_size = sizeof (md_longopts);
|
|||
|
|
|||
|
int
|
|||
|
md_parse_option (int c ATTRIBUTE_UNUSED,
|
|||
|
char * arg ATTRIBUTE_UNUSED)
|
|||
|
{
|
|||
|
return 0;
|
|||
|
}
|
|||
|
|
|||
|
void
|
|||
|
md_show_usage (FILE * stream)
|
|||
|
{
|
|||
|
fprintf (stream, _(" XSTORMY16 specific command line options:\n"));
|
|||
|
}
|
|||
|
|
|||
|
/* The target specific pseudo-ops which we support. */
|
|||
|
const pseudo_typeS md_pseudo_table[] =
|
|||
|
{
|
|||
|
{ "word", cons, 4 },
|
|||
|
{ NULL, NULL, 0 }
|
|||
|
};
|
|||
|
|
|||
|
|
|||
|
void
|
|||
|
md_begin (void)
|
|||
|
{
|
|||
|
/* Initialize the `cgen' interface. */
|
|||
|
|
|||
|
/* Set the machine number and endian. */
|
|||
|
gas_cgen_cpu_desc = xstormy16_cgen_cpu_open (CGEN_CPU_OPEN_MACHS, 0,
|
|||
|
CGEN_CPU_OPEN_ENDIAN,
|
|||
|
CGEN_ENDIAN_LITTLE,
|
|||
|
CGEN_CPU_OPEN_END);
|
|||
|
xstormy16_cgen_init_asm (gas_cgen_cpu_desc);
|
|||
|
|
|||
|
/* This is a callback from cgen to gas to parse operands. */
|
|||
|
cgen_set_parse_operand_fn (gas_cgen_cpu_desc, gas_cgen_parse_operand);
|
|||
|
}
|
|||
|
|
|||
|
static bfd_boolean skipping_fptr = FALSE;
|
|||
|
|
|||
|
void
|
|||
|
md_assemble (char * str)
|
|||
|
{
|
|||
|
xstormy16_insn insn;
|
|||
|
char * errmsg;
|
|||
|
|
|||
|
/* Make sure that if we had an erroneous input line which triggered
|
|||
|
the skipping_fptr boolean that it does not affect following lines. */
|
|||
|
skipping_fptr = FALSE;
|
|||
|
|
|||
|
/* Initialize GAS's cgen interface for a new instruction. */
|
|||
|
gas_cgen_init_parse ();
|
|||
|
|
|||
|
insn.insn = xstormy16_cgen_assemble_insn
|
|||
|
(gas_cgen_cpu_desc, str, & insn.fields, insn.buffer, & errmsg);
|
|||
|
|
|||
|
if (!insn.insn)
|
|||
|
{
|
|||
|
as_bad ("%s", errmsg);
|
|||
|
return;
|
|||
|
}
|
|||
|
|
|||
|
/* Doesn't really matter what we pass for RELAX_P here. */
|
|||
|
gas_cgen_finish_insn (insn.insn, insn.buffer,
|
|||
|
CGEN_FIELDS_BITSIZE (& insn.fields), 0, NULL);
|
|||
|
}
|
|||
|
|
|||
|
void
|
|||
|
md_operand (expressionS * e)
|
|||
|
{
|
|||
|
if (*input_line_pointer != '@')
|
|||
|
return;
|
|||
|
|
|||
|
if (strncmp (input_line_pointer + 1, "fptr", 4) == 0)
|
|||
|
{
|
|||
|
input_line_pointer += 5;
|
|||
|
SKIP_WHITESPACE ();
|
|||
|
if (*input_line_pointer != '(')
|
|||
|
{
|
|||
|
as_bad (_("Expected '('"));
|
|||
|
goto err;
|
|||
|
}
|
|||
|
input_line_pointer++;
|
|||
|
|
|||
|
expression (e);
|
|||
|
|
|||
|
if (*input_line_pointer != ')')
|
|||
|
{
|
|||
|
as_bad (_("Missing ')'"));
|
|||
|
goto err;
|
|||
|
}
|
|||
|
input_line_pointer++;
|
|||
|
SKIP_WHITESPACE ();
|
|||
|
|
|||
|
if (e->X_op != O_symbol)
|
|||
|
as_bad (_("Not a symbolic expression"));
|
|||
|
else if (* input_line_pointer == '-')
|
|||
|
/* We are computing the difference of two function pointers
|
|||
|
like this:
|
|||
|
|
|||
|
.hword @fptr (foo) - @fptr (bar)
|
|||
|
|
|||
|
In this situation we do not want to generate O_fptr_symbol
|
|||
|
operands because the result is an absolute value, not a
|
|||
|
function pointer.
|
|||
|
|
|||
|
We need to make the check here, rather than when the fixup
|
|||
|
is generated as the function names (foo & bar in the above
|
|||
|
example) might be local symbols and we want the expression
|
|||
|
to be evaluated now. This kind of thing can happen when
|
|||
|
gcc is generating computed gotos. */
|
|||
|
skipping_fptr = TRUE;
|
|||
|
else if (skipping_fptr)
|
|||
|
skipping_fptr = FALSE;
|
|||
|
else
|
|||
|
e->X_op = O_fptr_symbol;
|
|||
|
}
|
|||
|
|
|||
|
return;
|
|||
|
err:
|
|||
|
ignore_rest_of_line ();
|
|||
|
}
|
|||
|
|
|||
|
/* Called while parsing data to create a fixup.
|
|||
|
Create BFD_RELOC_XSTORMY16_FPTR16 relocations. */
|
|||
|
|
|||
|
void
|
|||
|
xstormy16_cons_fix_new (fragS *f,
|
|||
|
int where,
|
|||
|
int nbytes,
|
|||
|
expressionS *exp)
|
|||
|
{
|
|||
|
bfd_reloc_code_real_type code;
|
|||
|
fixS *fix;
|
|||
|
|
|||
|
if (exp->X_op == O_fptr_symbol)
|
|||
|
{
|
|||
|
switch (nbytes)
|
|||
|
{
|
|||
|
case 4:
|
|||
|
/* This can happen when gcc is generating debug output.
|
|||
|
For example it can create a stab with the address of
|
|||
|
a function:
|
|||
|
|
|||
|
.stabs "foo:F(0,21)",36,0,0,@fptr(foo)
|
|||
|
|
|||
|
Since this does not involve switching code pages, we
|
|||
|
just allow the reloc to be generated without any
|
|||
|
@fptr behaviour. */
|
|||
|
exp->X_op = O_symbol;
|
|||
|
code = BFD_RELOC_32;
|
|||
|
break;
|
|||
|
|
|||
|
case 2:
|
|||
|
exp->X_op = O_symbol;
|
|||
|
code = BFD_RELOC_XSTORMY16_FPTR16;
|
|||
|
break;
|
|||
|
|
|||
|
default:
|
|||
|
as_bad (_("unsupported fptr fixup size %d"), nbytes);
|
|||
|
return;
|
|||
|
}
|
|||
|
}
|
|||
|
else if (nbytes == 1)
|
|||
|
code = BFD_RELOC_8;
|
|||
|
else if (nbytes == 2)
|
|||
|
code = BFD_RELOC_16;
|
|||
|
else if (nbytes == 4)
|
|||
|
code = BFD_RELOC_32;
|
|||
|
else
|
|||
|
{
|
|||
|
as_bad (_("unsupported fixup size %d"), nbytes);
|
|||
|
return;
|
|||
|
}
|
|||
|
|
|||
|
fix = fix_new_exp (f, where, nbytes, exp, 0, code);
|
|||
|
}
|
|||
|
|
|||
|
/* Called while parsing an instruction to create a fixup.
|
|||
|
Create BFD_RELOC_XSTORMY16_FPTR16 relocations. */
|
|||
|
|
|||
|
fixS *
|
|||
|
xstormy16_cgen_record_fixup_exp (fragS * frag,
|
|||
|
int where,
|
|||
|
const CGEN_INSN * insn,
|
|||
|
int length,
|
|||
|
const CGEN_OPERAND * operand,
|
|||
|
int opinfo,
|
|||
|
expressionS * exp)
|
|||
|
{
|
|||
|
fixS *fixP;
|
|||
|
operatorT op = exp->X_op;
|
|||
|
|
|||
|
if (op == O_fptr_symbol)
|
|||
|
exp->X_op = O_symbol;
|
|||
|
|
|||
|
fixP = gas_cgen_record_fixup_exp (frag, where, insn, length,
|
|||
|
operand, opinfo, exp);
|
|||
|
|
|||
|
if (op == O_fptr_symbol)
|
|||
|
{
|
|||
|
if (operand->type != XSTORMY16_OPERAND_IMM16)
|
|||
|
as_bad (_("unsupported fptr fixup"));
|
|||
|
else
|
|||
|
{
|
|||
|
fixP->fx_r_type = BFD_RELOC_XSTORMY16_FPTR16;
|
|||
|
fixP->fx_where += 2;
|
|||
|
}
|
|||
|
}
|
|||
|
|
|||
|
return fixP;
|
|||
|
}
|
|||
|
|
|||
|
valueT
|
|||
|
md_section_align (segT segment, valueT size)
|
|||
|
{
|
|||
|
int align = bfd_get_section_alignment (stdoutput, segment);
|
|||
|
|
|||
|
return ((size + (1 << align) - 1) & (-1 << align));
|
|||
|
}
|
|||
|
|
|||
|
symbolS *
|
|||
|
md_undefined_symbol (char * name ATTRIBUTE_UNUSED)
|
|||
|
{
|
|||
|
return 0;
|
|||
|
}
|
|||
|
|
|||
|
/* Return an initial guess of the length by which a fragment must grow to
|
|||
|
hold a branch to reach its destination.
|
|||
|
Also updates fr_type/fr_subtype as necessary.
|
|||
|
|
|||
|
Called just before doing relaxation.
|
|||
|
Any symbol that is now undefined will not become defined.
|
|||
|
The guess for fr_var is ACTUALLY the growth beyond fr_fix.
|
|||
|
Whatever we do to grow fr_fix or fr_var contributes to our returned value.
|
|||
|
Although it may not be explicit in the frag, pretend fr_var starts with a
|
|||
|
0 value. */
|
|||
|
|
|||
|
int
|
|||
|
md_estimate_size_before_relax (fragS * fragP ATTRIBUTE_UNUSED,
|
|||
|
segT segment ATTRIBUTE_UNUSED)
|
|||
|
{
|
|||
|
/* No assembler relaxation is defined (or necessary) for this port. */
|
|||
|
abort ();
|
|||
|
}
|
|||
|
|
|||
|
/* *fragP has been relaxed to its final size, and now needs to have
|
|||
|
the bytes inside it modified to conform to the new size.
|
|||
|
|
|||
|
Called after relaxation is finished.
|
|||
|
fragP->fr_type == rs_machine_dependent.
|
|||
|
fragP->fr_subtype is the subtype of what the address relaxed to. */
|
|||
|
|
|||
|
void
|
|||
|
md_convert_frag (bfd * abfd ATTRIBUTE_UNUSED,
|
|||
|
segT sec ATTRIBUTE_UNUSED,
|
|||
|
fragS * fragP ATTRIBUTE_UNUSED)
|
|||
|
{
|
|||
|
/* No assembler relaxation is defined (or necessary) for this port. */
|
|||
|
abort ();
|
|||
|
}
|
|||
|
|
|||
|
/* Functions concerning relocs. */
|
|||
|
|
|||
|
/* The location from which a PC relative jump should be calculated,
|
|||
|
given a PC relative reloc. */
|
|||
|
|
|||
|
long
|
|||
|
md_pcrel_from_section (fixS * fixP, segT sec)
|
|||
|
{
|
|||
|
if ((fixP->fx_addsy != (symbolS *) NULL
|
|||
|
&& (! S_IS_DEFINED (fixP->fx_addsy)
|
|||
|
|| S_GET_SEGMENT (fixP->fx_addsy) != sec))
|
|||
|
|| xstormy16_force_relocation (fixP))
|
|||
|
/* The symbol is undefined,
|
|||
|
or it is defined but not in this section,
|
|||
|
or the relocation will be relative to this symbol not the section symbol.
|
|||
|
Let the linker figure it out. */
|
|||
|
return 0;
|
|||
|
|
|||
|
return fixP->fx_frag->fr_address + fixP->fx_where;
|
|||
|
}
|
|||
|
|
|||
|
/* Return the bfd reloc type for OPERAND of INSN at fixup FIXP.
|
|||
|
Returns BFD_RELOC_NONE if no reloc type can be found.
|
|||
|
*FIXP may be modified if desired. */
|
|||
|
|
|||
|
bfd_reloc_code_real_type
|
|||
|
md_cgen_lookup_reloc (const CGEN_INSN * insn ATTRIBUTE_UNUSED,
|
|||
|
const CGEN_OPERAND * operand,
|
|||
|
fixS * fixP)
|
|||
|
{
|
|||
|
switch (operand->type)
|
|||
|
{
|
|||
|
case XSTORMY16_OPERAND_IMM2:
|
|||
|
case XSTORMY16_OPERAND_IMM3:
|
|||
|
case XSTORMY16_OPERAND_IMM3B:
|
|||
|
case XSTORMY16_OPERAND_IMM4:
|
|||
|
case XSTORMY16_OPERAND_HMEM8:
|
|||
|
return BFD_RELOC_NONE;
|
|||
|
|
|||
|
case XSTORMY16_OPERAND_IMM12:
|
|||
|
fixP->fx_where += 2;
|
|||
|
return BFD_RELOC_XSTORMY16_12;
|
|||
|
|
|||
|
case XSTORMY16_OPERAND_IMM8:
|
|||
|
case XSTORMY16_OPERAND_LMEM8:
|
|||
|
return fixP->fx_pcrel ? BFD_RELOC_8_PCREL : BFD_RELOC_8;
|
|||
|
|
|||
|
case XSTORMY16_OPERAND_IMM16:
|
|||
|
/* This might have been processed at parse time. */
|
|||
|
fixP->fx_where += 2;
|
|||
|
if (fixP->fx_cgen.opinfo && fixP->fx_cgen.opinfo != BFD_RELOC_NONE)
|
|||
|
return fixP->fx_cgen.opinfo;
|
|||
|
return fixP->fx_pcrel ? BFD_RELOC_16_PCREL : BFD_RELOC_16;
|
|||
|
|
|||
|
case XSTORMY16_OPERAND_ABS24:
|
|||
|
return BFD_RELOC_XSTORMY16_24;
|
|||
|
|
|||
|
case XSTORMY16_OPERAND_REL8_4:
|
|||
|
fixP->fx_addnumber -= 2;
|
|||
|
case XSTORMY16_OPERAND_REL8_2:
|
|||
|
fixP->fx_addnumber -= 2;
|
|||
|
fixP->fx_pcrel = 1;
|
|||
|
return BFD_RELOC_8_PCREL;
|
|||
|
|
|||
|
case XSTORMY16_OPERAND_REL12:
|
|||
|
fixP->fx_where += 2;
|
|||
|
/* Fall through... */
|
|||
|
case XSTORMY16_OPERAND_REL12A:
|
|||
|
fixP->fx_addnumber -= 2;
|
|||
|
fixP->fx_pcrel = 1;
|
|||
|
return BFD_RELOC_XSTORMY16_REL_12;
|
|||
|
|
|||
|
default : /* avoid -Wall warning */
|
|||
|
abort ();
|
|||
|
}
|
|||
|
}
|
|||
|
|
|||
|
/* See whether we need to force a relocation into the output file.
|
|||
|
This is used to force out switch and PC relative relocations when
|
|||
|
relaxing. */
|
|||
|
|
|||
|
int
|
|||
|
xstormy16_force_relocation (fixS * fix)
|
|||
|
{
|
|||
|
if (fix->fx_r_type == BFD_RELOC_XSTORMY16_FPTR16)
|
|||
|
return 1;
|
|||
|
|
|||
|
return generic_force_reloc (fix);
|
|||
|
}
|
|||
|
|
|||
|
/* Return true if a relocation against a symbol may be replaced with
|
|||
|
a relocation against section+offset. */
|
|||
|
|
|||
|
bfd_boolean
|
|||
|
xstormy16_fix_adjustable (fixS * fixP)
|
|||
|
{
|
|||
|
/* We need the symbol name for the VTABLE entries. */
|
|||
|
if (fixP->fx_r_type == BFD_RELOC_VTABLE_INHERIT
|
|||
|
|| fixP->fx_r_type == BFD_RELOC_VTABLE_ENTRY)
|
|||
|
return FALSE;
|
|||
|
|
|||
|
if (fixP->fx_r_type == BFD_RELOC_XSTORMY16_FPTR16)
|
|||
|
return FALSE;
|
|||
|
|
|||
|
return TRUE;
|
|||
|
}
|
|||
|
|
|||
|
/* This is a copy of gas_cgen_md_apply_fix, with some enhancements to
|
|||
|
do various things that would not be valid for all ports. */
|
|||
|
|
|||
|
void
|
|||
|
xstormy16_md_apply_fix (fixS * fixP,
|
|||
|
valueT * valueP,
|
|||
|
segT seg ATTRIBUTE_UNUSED)
|
|||
|
{
|
|||
|
char *where = fixP->fx_frag->fr_literal + fixP->fx_where;
|
|||
|
valueT value = *valueP;
|
|||
|
/* Canonical name, since used a lot. */
|
|||
|
CGEN_CPU_DESC cd = gas_cgen_cpu_desc;
|
|||
|
|
|||
|
/* md_cgen_lookup_reloc() will adjust this to compensate for where
|
|||
|
in the opcode the relocation happens, for pcrel relocations. We
|
|||
|
have no other way of keeping track of what this offset needs to
|
|||
|
be. */
|
|||
|
fixP->fx_addnumber = 0;
|
|||
|
|
|||
|
/* This port has pc-relative relocs and DIFF_EXPR_OK defined, so
|
|||
|
it must deal with turning a BFD_RELOC_{8,16,32,64} into a
|
|||
|
BFD_RELOC_*_PCREL for the case of
|
|||
|
|
|||
|
.word something-. */
|
|||
|
if (fixP->fx_pcrel)
|
|||
|
switch (fixP->fx_r_type)
|
|||
|
{
|
|||
|
case BFD_RELOC_8:
|
|||
|
fixP->fx_r_type = BFD_RELOC_8_PCREL;
|
|||
|
break;
|
|||
|
case BFD_RELOC_16:
|
|||
|
fixP->fx_r_type = BFD_RELOC_16_PCREL;
|
|||
|
break;
|
|||
|
case BFD_RELOC_32:
|
|||
|
fixP->fx_r_type = BFD_RELOC_32_PCREL;
|
|||
|
break;
|
|||
|
case BFD_RELOC_64:
|
|||
|
fixP->fx_r_type = BFD_RELOC_64_PCREL;
|
|||
|
break;
|
|||
|
default:
|
|||
|
break;
|
|||
|
}
|
|||
|
|
|||
|
if (fixP->fx_addsy == (symbolS *) NULL)
|
|||
|
fixP->fx_done = 1;
|
|||
|
|
|||
|
/* We don't actually support subtracting a symbol. */
|
|||
|
if (fixP->fx_subsy != (symbolS *) NULL)
|
|||
|
as_bad_where (fixP->fx_file, fixP->fx_line, _("expression too complex"));
|
|||
|
|
|||
|
if ((int) fixP->fx_r_type >= (int) BFD_RELOC_UNUSED)
|
|||
|
{
|
|||
|
int opindex = (int) fixP->fx_r_type - (int) BFD_RELOC_UNUSED;
|
|||
|
const CGEN_OPERAND *operand = cgen_operand_lookup_by_num (cd, opindex);
|
|||
|
const char *errmsg;
|
|||
|
bfd_reloc_code_real_type reloc_type;
|
|||
|
CGEN_FIELDS *fields = alloca (CGEN_CPU_SIZEOF_FIELDS (cd));
|
|||
|
const CGEN_INSN *insn = fixP->fx_cgen.insn;
|
|||
|
|
|||
|
/* If the reloc has been fully resolved finish the operand here. */
|
|||
|
/* FIXME: This duplicates the capabilities of code in BFD. */
|
|||
|
if (fixP->fx_done)
|
|||
|
{
|
|||
|
CGEN_CPU_SET_FIELDS_BITSIZE (cd) (fields, CGEN_INSN_BITSIZE (insn));
|
|||
|
CGEN_CPU_SET_VMA_OPERAND (cd) (cd, opindex, fields, (bfd_vma) value);
|
|||
|
|
|||
|
#if CGEN_INT_INSN_P
|
|||
|
{
|
|||
|
CGEN_INSN_INT insn_value =
|
|||
|
cgen_get_insn_value (cd, (unsigned char *) where,
|
|||
|
CGEN_INSN_BITSIZE (insn));
|
|||
|
|
|||
|
/* ??? 0 is passed for `pc'. */
|
|||
|
errmsg = CGEN_CPU_INSERT_OPERAND (cd) (cd, opindex, fields,
|
|||
|
&insn_value, (bfd_vma) 0);
|
|||
|
cgen_put_insn_value (cd, (unsigned char *) where,
|
|||
|
CGEN_INSN_BITSIZE (insn), insn_value);
|
|||
|
}
|
|||
|
#else
|
|||
|
/* ??? 0 is passed for `pc'. */
|
|||
|
errmsg = CGEN_CPU_INSERT_OPERAND (cd) (cd, opindex, fields,
|
|||
|
(unsigned char *) where,
|
|||
|
(bfd_vma) 0);
|
|||
|
#endif
|
|||
|
if (errmsg)
|
|||
|
as_bad_where (fixP->fx_file, fixP->fx_line, "%s", errmsg);
|
|||
|
}
|
|||
|
|
|||
|
if (fixP->fx_done)
|
|||
|
return;
|
|||
|
|
|||
|
/* The operand isn't fully resolved. Determine a BFD reloc value
|
|||
|
based on the operand information and leave it to
|
|||
|
bfd_install_relocation. Note that this doesn't work when
|
|||
|
!partial_inplace. */
|
|||
|
|
|||
|
reloc_type = md_cgen_lookup_reloc (insn, operand, fixP);
|
|||
|
if (reloc_type != BFD_RELOC_NONE)
|
|||
|
fixP->fx_r_type = reloc_type;
|
|||
|
else
|
|||
|
{
|
|||
|
as_bad_where (fixP->fx_file, fixP->fx_line,
|
|||
|
_("unresolved expression that must be resolved"));
|
|||
|
fixP->fx_done = 1;
|
|||
|
return;
|
|||
|
}
|
|||
|
}
|
|||
|
else if (fixP->fx_done)
|
|||
|
{
|
|||
|
/* We're finished with this fixup. Install it because
|
|||
|
bfd_install_relocation won't be called to do it. */
|
|||
|
switch (fixP->fx_r_type)
|
|||
|
{
|
|||
|
case BFD_RELOC_8:
|
|||
|
md_number_to_chars (where, value, 1);
|
|||
|
break;
|
|||
|
case BFD_RELOC_16:
|
|||
|
md_number_to_chars (where, value, 2);
|
|||
|
break;
|
|||
|
case BFD_RELOC_32:
|
|||
|
md_number_to_chars (where, value, 4);
|
|||
|
break;
|
|||
|
case BFD_RELOC_64:
|
|||
|
md_number_to_chars (where, value, 8);
|
|||
|
break;
|
|||
|
default:
|
|||
|
as_bad_where (fixP->fx_file, fixP->fx_line,
|
|||
|
_("internal error: can't install fix for reloc type %d (`%s')"),
|
|||
|
fixP->fx_r_type, bfd_get_reloc_code_name (fixP->fx_r_type));
|
|||
|
break;
|
|||
|
}
|
|||
|
}
|
|||
|
else
|
|||
|
{
|
|||
|
/* bfd_install_relocation will be called to finish things up. */
|
|||
|
}
|
|||
|
|
|||
|
/* This is a RELA port. Thus, it does not need to store a
|
|||
|
value if it is going to make a reloc. What's more, when
|
|||
|
assembling a line like
|
|||
|
|
|||
|
.byte global-0x7f00
|
|||
|
|
|||
|
we'll get a spurious error message if we try to stuff 0x7f00 into
|
|||
|
the byte. */
|
|||
|
if (! fixP->fx_done)
|
|||
|
*valueP = 0;
|
|||
|
|
|||
|
/* Tuck `value' away for use by tc_gen_reloc.
|
|||
|
See the comment describing fx_addnumber in write.h.
|
|||
|
This field is misnamed (or misused :-). */
|
|||
|
fixP->fx_addnumber += value;
|
|||
|
}
|
|||
|
|
|||
|
|
|||
|
/* Write a value out to the object file, using the appropriate endianness. */
|
|||
|
|
|||
|
void
|
|||
|
md_number_to_chars (char * buf, valueT val, int n)
|
|||
|
{
|
|||
|
number_to_chars_littleendian (buf, val, n);
|
|||
|
}
|
|||
|
|
|||
|
char *
|
|||
|
md_atof (int type, char * litP, int * sizeP)
|
|||
|
{
|
|||
|
return ieee_md_atof (type, litP, sizeP, FALSE);
|
|||
|
}
|