fixS *
gas_cgen_record_fixup_exp (fragS *frag, int where, const CGEN_INSN *insn,
int length, const CGEN_OPERAND *operand, int opinfo,
expressionS *exp)
{
fixS *fixP;
/* It may seem strange to use operand->attrs and not insn->attrs here,
but it is the operand that has a pc relative relocation. */
fixP = fix_new_exp (frag, where, length / 8, exp,
CGEN_OPERAND_ATTR_VALUE (operand, CGEN_OPERAND_PCREL_ADDR),
(bfd_reloc_code_real_type)
((int) BFD_RELOC_UNUSED
+ (int) operand->type));
fixP->fx_cgen.insn = insn;
fixP->fx_cgen.opinfo = opinfo;
fixP->fx_cgen.field = NULL;
fixP->fx_cgen.msb_field_p = 0;
return fixP;
}
static void
build_operand_table (CGEN_CPU_TABLE *cd)
{
int i;
int machs = cd->machs;
const CGEN_OPERAND *init = & xstormy16_cgen_operand_table[0];
/* MAX_OPERANDS is only an upper bound on the number of selected entries.
However each entry is indexed by it's enum so there can be holes in
the table. */
const CGEN_OPERAND **selected = xmalloc (MAX_OPERANDS * sizeof (* selected));
cd->operand_table.init_entries = init;
cd->operand_table.entry_size = sizeof (CGEN_OPERAND);
memset (selected, 0, MAX_OPERANDS * sizeof (CGEN_OPERAND *));
/* ??? For now we just use mach to determine which ones we want. */
for (i = 0; init[i].name != NULL; ++i)
if (CGEN_OPERAND_ATTR_VALUE (&init[i], CGEN_OPERAND_MACH)
& machs)
selected[init[i].type] = &init[i];
cd->operand_table.entries = selected;
cd->operand_table.num_entries = MAX_OPERANDS;
}
const char *
gas_cgen_parse_operand (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
enum cgen_parse_operand_type want, const char **strP,
int opindex, int opinfo,
enum cgen_parse_operand_result *resultP,
bfd_vma *valueP)
{
#ifdef __STDC__
/* These are volatile to survive the setjmp. */
char * volatile hold;
enum cgen_parse_operand_result * volatile resultP_1;
volatile int opinfo_1;
#else
static char *hold;
static enum cgen_parse_operand_result *resultP_1;
int opinfo_1;
#endif
const char *errmsg;
expressionS exp;
#ifdef OBJ_COMPLEX_RELC
volatile int signed_p = 0;
symbolS * stmp = NULL;
bfd_reloc_code_real_type reloc_type;
const CGEN_OPERAND * operand;
fixS dummy_fixup;
#endif
if (want == CGEN_PARSE_OPERAND_INIT)
{
gas_cgen_init_parse ();
return NULL;
}
resultP_1 = resultP;
hold = input_line_pointer;
input_line_pointer = (char *) *strP;
opinfo_1 = opinfo;
/* We rely on md_operand to longjmp back to us.
This is done via gas_cgen_md_operand. */
if (setjmp (expr_jmp_buf) != 0)
{
expr_jmp_buf_p = 0;
input_line_pointer = (char *) hold;
*resultP_1 = CGEN_PARSE_OPERAND_RESULT_ERROR;
return _("illegal operand");
}
expr_jmp_buf_p = 1;
expression (&exp);
expr_jmp_buf_p = 0;
errmsg = NULL;
*strP = input_line_pointer;
input_line_pointer = hold;
#ifdef TC_CGEN_PARSE_FIX_EXP
opinfo_1 = TC_CGEN_PARSE_FIX_EXP (opinfo_1, & exp);
#endif
/* FIXME: Need to check `want'. */
switch (exp.X_op)
{
case O_illegal:
errmsg = _("illegal operand");
*resultP = CGEN_PARSE_OPERAND_RESULT_ERROR;
break;
case O_absent:
errmsg = _("missing operand");
*resultP = CGEN_PARSE_OPERAND_RESULT_ERROR;
break;
case O_constant:
if (want == CGEN_PARSE_OPERAND_SYMBOLIC)
goto de_fault;
*valueP = exp.X_add_number;
*resultP = CGEN_PARSE_OPERAND_RESULT_NUMBER;
break;
case O_register:
*valueP = exp.X_add_number;
*resultP = CGEN_PARSE_OPERAND_RESULT_REGISTER;
break;
de_fault:
default:
#ifdef OBJ_COMPLEX_RELC
/* Look up operand, check to see if there's an obvious
overflow (this helps disambiguate some insn parses). */
operand = cgen_operand_lookup_by_num (cd, opindex);
errmsg = weak_operand_overflow_check (& exp, operand);
if (! errmsg)
{
/* Fragment the expression as necessary, and queue a reloc. */
memset (& dummy_fixup, 0, sizeof (fixS));
reloc_type = md_cgen_lookup_reloc (0, operand, & dummy_fixup);
if (exp.X_op == O_symbol
&& reloc_type == BFD_RELOC_RELC
&& exp.X_add_symbol->sy_value.X_op == O_constant
&& (!exp.X_add_symbol->bsym
|| (exp.X_add_symbol->bsym->section != expr_section
&& exp.X_add_symbol->bsym->section != absolute_section
&& exp.X_add_symbol->bsym->section != undefined_section)))
{
/* Local labels will have been (eagerly) turned into constants
by now, due to the inappropriately deep insight of the
expression parser. Unfortunately make_expr_symbol
prematurely dives into the symbol evaluator, and in this
case it gets a bad answer, so we manually create the
expression symbol we want here. */
stmp = symbol_create (FAKE_LABEL_NAME, expr_section, 0,
& zero_address_frag);
symbol_set_value_expression (stmp, & exp);
}
else
stmp = make_expr_symbol (& exp);
/* If this is a pc-relative RELC operand, we
need to subtract "." from the expression. */
if (reloc_type == BFD_RELOC_RELC
&& CGEN_OPERAND_ATTR_VALUE (operand, CGEN_OPERAND_PCREL_ADDR))
stmp = expr_build_binary (O_subtract, stmp, expr_build_dot ());
/* FIXME: this is not a perfect heuristic for figuring out
whether an operand is signed: it only works when the operand
is an immediate. it's not terribly likely that any other
values will be signed relocs, but it's possible. */
if (operand && (operand->hw_type == HW_H_SINT))
signed_p = 1;
if (stmp->bsym && (stmp->bsym->section == expr_section)
&& ! S_IS_LOCAL (stmp))
{
if (signed_p)
stmp->bsym->flags |= BSF_SRELC;
else
stmp->bsym->flags |= BSF_RELC;
}
/* Now package it all up for the fixup emitter. */
exp.X_op = O_symbol;
exp.X_op_symbol = 0;
exp.X_add_symbol = stmp;
exp.X_add_number = 0;
/* Re-init rightshift quantity, just in case. */
rightshift = operand->length;
queue_fixup_recursively (opindex, opinfo_1, & exp,
(reloc_type == BFD_RELOC_RELC) ?
& (operand->index_fields) : 0,
signed_p, -1);
}
* resultP = errmsg
? CGEN_PARSE_OPERAND_RESULT_ERROR
: CGEN_PARSE_OPERAND_RESULT_QUEUED;
*valueP = 0;
#else
queue_fixup (opindex, opinfo_1, &exp);
*valueP = 0;
*resultP = CGEN_PARSE_OPERAND_RESULT_QUEUED;
#endif
break;
}
return errmsg;
}