symbolS * make_expr_symbol (expressionS *expressionP) { #ifdef NOTYET expressionS zero; #endif symbolS *symbolP; #ifdef NOTYET struct expr_symbol_line *n; #endif if (expressionP->X_op == O_symbol && expressionP->X_add_number == 0) return expressionP->X_add_symbol; #ifndef NOTYET abort (); #else if (expressionP->X_op == O_big) { /* This won't work, because the actual value is stored in generic_floating_point_number or generic_bignum, and we are going to lose it if we haven't already. */ if (expressionP->X_add_number > 0) as_bad (_("bignum invalid")); else as_bad (_("floating point number invalid")); zero.X_op = O_constant; zero.X_add_number = 0; zero.X_unsigned = 0; clean_up_expression (&zero); expressionP = &zero; } /* Putting constant symbols in absolute_section rather than expr_section is convenient for the old a.out code, for which S_GET_SEGMENT does not always retrieve the value put in by S_SET_SEGMENT. */ symbolP = symbol_create (FAKE_LABEL_NAME, (expressionP->X_op == O_constant ? absolute_section : expr_section), 0, &zero_address_frag); symbol_set_value_expression (symbolP, expressionP); if (expressionP->X_op == O_constant) resolve_symbol_value (symbolP); n = (struct expr_symbol_line *) xmalloc (sizeof *n); n->sym = symbolP; as_where (&n->file, &n->line); n->next = expr_symbol_lines; expr_symbol_lines = n; #endif return symbolP; }
static void obj_coff_val (int ignore ATTRIBUTE_UNUSED) { if (def_symbol_in_progress == NULL) { as_warn (_(".val pseudo-op used outside of .def/.endef ignored.")); demand_empty_rest_of_line (); return; } if (is_name_beginner (*input_line_pointer)) { char *symbol_name = input_line_pointer; char name_end = get_symbol_end (); #ifdef tc_canonicalize_symbol_name symbol_name = tc_canonicalize_symbol_name (symbol_name); #endif if (streq (symbol_name, ".")) { /* If the .val is != from the .def (e.g. statics). */ symbol_set_frag (def_symbol_in_progress, frag_now); S_SET_VALUE (def_symbol_in_progress, (valueT) frag_now_fix ()); } else if (! streq (S_GET_NAME (def_symbol_in_progress), symbol_name)) { expressionS exp; exp.X_op = O_symbol; exp.X_add_symbol = symbol_find_or_make (symbol_name); exp.X_op_symbol = NULL; exp.X_add_number = 0; symbol_set_value_expression (def_symbol_in_progress, &exp); /* If the segment is undefined when the forward reference is resolved, then copy the segment id from the forward symbol. */ SF_SET_GET_SEGMENT (def_symbol_in_progress); /* FIXME: gcc can generate address expressions here in unusual cases (search for "obscure" in sdbout.c). We just ignore the offset here, thus generating incorrect debugging information. We ignore the rest of the line just below. */ } /* Otherwise, it is the name of a non debug symbol and its value will be calculated later. */ *input_line_pointer = name_end; } else { S_SET_VALUE (def_symbol_in_progress, get_absolute_expression ()); } demand_empty_rest_of_line (); }
void coff_frob_symbol (symbolS *symp, int *punt) { static symbolS *last_tagP; static stack *block_stack; static symbolS *set_end; symbolS *next_set_end = NULL; if (symp == &abs_symbol) { *punt = 1; return; } if (current_lineno_sym) coff_add_linesym (NULL); if (!block_stack) block_stack = stack_init (512, sizeof (symbolS*)); #ifdef TE_PE if (S_GET_STORAGE_CLASS (symp) == C_NT_WEAK && ! S_IS_WEAK (symp) && weak_is_altname (S_GET_NAME (symp))) { /* This is a weak alternate symbol. All processing of PECOFFweak symbols is done here, through the alternate. */ symbolS *weakp = symbol_find_noref (weak_altname2name (S_GET_NAME (symp)), 1); assert (weakp); assert (S_GET_NUMBER_AUXILIARY (weakp) == 1); if (! S_IS_WEAK (weakp)) { /* The symbol was turned from weak to strong. Discard altname. */ *punt = 1; return; } else if (symbol_equated_p (weakp)) { /* The weak symbol has an alternate specified; symp is unneeded. */ S_SET_STORAGE_CLASS (weakp, C_NT_WEAK); SA_SET_SYM_TAGNDX (weakp, symbol_get_value_expression (weakp)->X_add_symbol); S_CLEAR_EXTERNAL (symp); *punt = 1; return; } else { /* The weak symbol has been assigned an alternate value. Copy this value to symp, and set symp as weakp's alternate. */ if (S_GET_STORAGE_CLASS (weakp) != C_NT_WEAK) { S_SET_STORAGE_CLASS (symp, S_GET_STORAGE_CLASS (weakp)); S_SET_STORAGE_CLASS (weakp, C_NT_WEAK); } if (S_IS_DEFINED (weakp)) { /* This is a defined weak symbol. Copy value information from the weak symbol itself to the alternate symbol. */ symbol_set_value_expression (symp, symbol_get_value_expression (weakp)); symbol_set_frag (symp, symbol_get_frag (weakp)); S_SET_SEGMENT (symp, S_GET_SEGMENT (weakp)); } else { /* This is an undefined weak symbol. Define the alternate symbol to zero. */ S_SET_VALUE (symp, 0); S_SET_SEGMENT (symp, absolute_section); } S_SET_NAME (symp, weak_uniquify (S_GET_NAME (symp))); S_SET_STORAGE_CLASS (symp, C_EXT); S_SET_VALUE (weakp, 0); S_SET_SEGMENT (weakp, undefined_section); } } #else /* TE_PE */ if (S_IS_WEAK (symp)) S_SET_STORAGE_CLASS (symp, C_WEAKEXT); #endif /* TE_PE */ if (!S_IS_DEFINED (symp) && !S_IS_WEAK (symp) && S_GET_STORAGE_CLASS (symp) != C_STAT) S_SET_STORAGE_CLASS (symp, C_EXT); if (!SF_GET_DEBUG (symp)) { symbolS * real; if (!SF_GET_LOCAL (symp) && !SF_GET_STATICS (symp) && S_GET_STORAGE_CLASS (symp) != C_LABEL && symbol_constant_p (symp) && (real = symbol_find_noref (S_GET_NAME (symp), 1)) && S_GET_STORAGE_CLASS (real) == C_NULL && real != symp) { c_symbol_merge (symp, real); *punt = 1; return; } if (!S_IS_DEFINED (symp) && !SF_GET_LOCAL (symp)) { assert (S_GET_VALUE (symp) == 0); if (S_IS_WEAKREFD (symp)) *punt = 1; else S_SET_EXTERNAL (symp); } else if (S_GET_STORAGE_CLASS (symp) == C_NULL) { if (S_GET_SEGMENT (symp) == text_section && symp != seg_info (text_section)->sym) S_SET_STORAGE_CLASS (symp, C_LABEL); else S_SET_STORAGE_CLASS (symp, C_STAT); } if (SF_GET_PROCESS (symp)) { if (S_GET_STORAGE_CLASS (symp) == C_BLOCK) { if (streq (S_GET_NAME (symp), ".bb")) stack_push (block_stack, (char *) &symp); else { symbolS *begin; begin = *(symbolS **) stack_pop (block_stack); if (begin == 0) as_warn (_("mismatched .eb")); else next_set_end = begin; } } if (coff_last_function == 0 && SF_GET_FUNCTION (symp)) { union internal_auxent *auxp; coff_last_function = symp; if (S_GET_NUMBER_AUXILIARY (symp) < 1) S_SET_NUMBER_AUXILIARY (symp, 1); auxp = SYM_AUXENT (symp); memset (auxp->x_sym.x_fcnary.x_ary.x_dimen, 0, sizeof (auxp->x_sym.x_fcnary.x_ary.x_dimen)); } if (S_GET_STORAGE_CLASS (symp) == C_EFCN) { if (coff_last_function == 0) as_fatal (_("C_EFCN symbol for %s out of scope"), S_GET_NAME (symp)); SA_SET_SYM_FSIZE (coff_last_function, (long) (S_GET_VALUE (symp) - S_GET_VALUE (coff_last_function))); next_set_end = coff_last_function; coff_last_function = 0; } } if (S_IS_EXTERNAL (symp)) S_SET_STORAGE_CLASS (symp, C_EXT); else if (SF_GET_LOCAL (symp)) *punt = 1; if (SF_GET_FUNCTION (symp)) symbol_get_bfdsym (symp)->flags |= BSF_FUNCTION; } /* Double check weak symbols. */ if (S_IS_WEAK (symp) && S_IS_COMMON (symp)) as_bad (_("Symbol `%s' can not be both weak and common"), S_GET_NAME (symp)); if (SF_GET_TAG (symp)) last_tagP = symp; else if (S_GET_STORAGE_CLASS (symp) == C_EOS) next_set_end = last_tagP; #ifdef OBJ_XCOFF /* This is pretty horrible, but we have to set *punt correctly in order to call SA_SET_SYM_ENDNDX correctly. */ if (! symbol_used_in_reloc_p (symp) && ((symbol_get_bfdsym (symp)->flags & BSF_SECTION_SYM) != 0 || (! (S_IS_EXTERNAL (symp) || S_IS_WEAK (symp)) && ! symbol_get_tc (symp)->output && S_GET_STORAGE_CLASS (symp) != C_FILE))) *punt = 1; #endif if (set_end != (symbolS *) NULL && ! *punt && ((symbol_get_bfdsym (symp)->flags & BSF_NOT_AT_END) != 0 || (S_IS_DEFINED (symp) && ! S_IS_COMMON (symp) && (! S_IS_EXTERNAL (symp) || SF_GET_FUNCTION (symp))))) { SA_SET_SYM_ENDNDX (set_end, symp); set_end = NULL; } if (next_set_end != NULL) { if (set_end != NULL) as_warn ("Warning: internal error: forgetting to set endndx of %s", S_GET_NAME (set_end)); set_end = next_set_end; } #ifndef OBJ_XCOFF if (! *punt && S_GET_STORAGE_CLASS (symp) == C_FCN && streq (S_GET_NAME (symp), ".bf")) { if (coff_last_bf != NULL) SA_SET_SYM_ENDNDX (coff_last_bf, symp); coff_last_bf = symp; } #endif if (coffsymbol (symbol_get_bfdsym (symp))->lineno) { int i; struct line_no *lptr; alent *l; lptr = (struct line_no *) coffsymbol (symbol_get_bfdsym (symp))->lineno; for (i = 0; lptr; lptr = lptr->next) i++; lptr = (struct line_no *) coffsymbol (symbol_get_bfdsym (symp))->lineno; /* We need i entries for line numbers, plus 1 for the first entry which BFD will override, plus 1 for the last zero entry (a marker for BFD). */ l = xmalloc ((i + 2) * sizeof (* l)); coffsymbol (symbol_get_bfdsym (symp))->lineno = l; l[i + 1].line_number = 0; l[i + 1].u.sym = NULL; for (; i > 0; i--) { if (lptr->frag) lptr->l.u.offset += lptr->frag->fr_address / OCTETS_PER_BYTE; l[i] = lptr->l; lptr = lptr->next; } } }
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; }