ST_FUNC void arm_init_types(void)
{
    float_type.t = VT_FLOAT;
    double_type.t = VT_DOUBLE;
    func_float_type.t = VT_FUNC;
    func_float_type.ref = sym_push(SYM_FIELD, &float_type, FUNC_CDECL, FUNC_OLD);
    func_double_type.t = VT_FUNC;
    func_double_type.ref = sym_push(SYM_FIELD, &double_type, FUNC_CDECL, FUNC_OLD);
}
Exemple #2
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static struct sym_info *get_or_create_sym(const char *symbol)
{
  unsigned int pos;
  struct sym_info *sym = sym_get(symbol);
  if (sym == NULL)
	{
	  pos = hash_string(symbol) % SYMTAB_SIZE;
	  sym = sym_push(&symtab[pos], symbol, NULL, 0, NULL_EXPR, "", SYM_BIND_DEFAULT);
	  sym->defined = 0;
	}
  return sym;
}
Exemple #3
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/* generate function prolog of type 't' */
void gfunc_prolog(int t)
{
    int addr, u, func_call;
    Sym *sym;
    char buf[1024];

    init_outfile();

    /* XXX: pass function name to gfunc_prolog */
    il_type_to_str(buf, sizeof(buf), t, funcname);
    fprintf(il_outfile, ".method static %s il managed\n", buf);
    fprintf(il_outfile, "{\n");
    /* XXX: cannot do better now */
    fprintf(il_outfile, " .maxstack %d\n", NB_REGS);
    fprintf(il_outfile, " .locals (int32, int32, int32, int32, int32, int32, int32, int32)\n");
    
    if (!strcmp(funcname, "main"))
        fprintf(il_outfile, " .entrypoint\n");
        
    sym = sym_find((unsigned)t >> VT_STRUCT_SHIFT);
    func_call = sym->r;

    addr = ARG_BASE;
    /* if the function returns a structure, then add an
       implicit pointer parameter */
    func_vt = sym->t;
    func_var = (sym->c == FUNC_ELLIPSIS);
    if ((func_vt & VT_BTYPE) == VT_STRUCT) {
        func_vc = addr;
        addr++;
    }
    /* define parameters */
    while ((sym = sym->next) != NULL) {
        u = sym->t;
        sym_push(sym->v & ~SYM_FIELD, u,
                 VT_LOCAL | lvalue_type(sym->type.t), addr);
        addr++;
    }
}
Exemple #4
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// Generate function prolog of type 't'
void gfunc_prolog(CType *func_type) {
  int addr, align, size, func_call, fastcall_nb_regs;
  int param_index, param_addr;
  uint8_t *fastcall_regs_ptr;
  Sym *sym;
  CType *type;

#ifdef DEBUG_BRANCH
  printf("compile %s\n", func_name);
#endif
  reset_code_buf();
  gbranch(CodeStart);

  sym = func_type->ref;
  func_naked = FUNC_NAKED(sym->r);
  func_call = FUNC_CALL(sym->r);
  addr = 8;
  loc = 0;
  regs_used = 0;
  if (func_call >= FUNC_FASTCALL1 && func_call <= FUNC_FASTCALL3) {
    fastcall_nb_regs = func_call - FUNC_FASTCALL1 + 1;
    fastcall_regs_ptr = fastcall_regs;
  } else if (func_call == FUNC_FASTCALLW) {
    fastcall_nb_regs = 2;
    fastcall_regs_ptr = fastcallw_regs;
  } else {
    fastcall_nb_regs = 0;
    fastcall_regs_ptr = NULL;
  }
  param_index = 0;

  // If the function returns a structure, then add an implicit pointer parameter
  func_vt = sym->type;
  if ((func_vt.t & VT_BTYPE) == VT_STRUCT) {
    // TODO: fastcall case?
    func_vc = addr;
    addr += 4;
    param_index++;
  }

  // Define parameters
  while ((sym = sym->next) != NULL) {
    type = &sym->type;
    size = type_size(type, &align);
    size = (size + 3) & ~3;
    if (param_index < fastcall_nb_regs) {
      // Save FASTCALL register
      if (!func_naked) {
        loc -= 4;
        o(0x89);     // movl
        gen_modrm(fastcall_regs_ptr[param_index], VT_LOCAL, NULL, loc);
        param_addr = loc;
      }
    } else {
      param_addr = addr;
      addr += size;
    }
    sym_push(sym->v & ~SYM_FIELD, type, VT_LOCAL | VT_LVAL, param_addr);
    param_index++;
  }

  // pascal type call?
  func_ret_sub = 0;
  if (func_call == FUNC_STDCALL) func_ret_sub = addr - 8;
  
  func_noargs = (addr == 8);
}
Exemple #5
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/* generate function prolog of type 't' */
void gfunc_prolog(CType *func_type)
{
    int addr, align, size, func_call, fastcall_nb_regs;
    int param_index, param_addr;
    uint8_t *fastcall_regs_ptr;
    Sym *sym;
    CType *type;

    sym = func_type->ref;
    func_call = FUNC_CALL(sym->r);
    addr = 8;
    loc = 0;
    if (func_call >= FUNC_FASTCALL1 && func_call <= FUNC_FASTCALL3) {
        fastcall_nb_regs = func_call - FUNC_FASTCALL1 + 1;
        fastcall_regs_ptr = fastcall_regs;
    } else if (func_call == FUNC_FASTCALLW) {
        fastcall_nb_regs = 2;
        fastcall_regs_ptr = fastcallw_regs;
    } else {
        fastcall_nb_regs = 0;
        fastcall_regs_ptr = NULL;
    }
    param_index = 0;

    ind += FUNC_PROLOG_SIZE;
    func_sub_sp_offset = ind;
    /* if the function returns a structure, then add an
       implicit pointer parameter */
    func_vt = sym->type;
    if ((func_vt.t & VT_BTYPE) == VT_STRUCT) {
        /* XXX: fastcall case ? */
        func_vc = addr;
        addr += 4;
        param_index++;
    }
    /* define parameters */
    while ((sym = sym->next) != NULL) {
        type = &sym->type;
        size = type_size(type, &align);
        size = (size + 3) & ~3;
#ifdef FUNC_STRUCT_PARAM_AS_PTR
        /* structs are passed as pointer */
        if ((type->t & VT_BTYPE) == VT_STRUCT) {
            size = 4;
        }
#endif
        if (param_index < fastcall_nb_regs) {
            /* save FASTCALL register */
            loc -= 4;
            o(0x89);     /* movl */
            gen_modrm(fastcall_regs_ptr[param_index], VT_LOCAL, NULL, loc);
            param_addr = loc;
        } else {
            param_addr = addr;
            addr += size;
        }
        sym_push(sym->v & ~SYM_FIELD, type,
                 VT_LOCAL | lvalue_type(type->t), param_addr);
        param_index++;
    }
    func_ret_sub = 0;
    /* pascal type call ? */
    if (func_call == FUNC_STDCALL)
        func_ret_sub = addr - 8;

    /* leave some room for bound checking code */
    if (tcc_state->do_bounds_check) {
        oad(0xb8, 0); /* lbound section pointer */
        oad(0xb8, 0); /* call to function */
        func_bound_offset = lbounds_section->data_offset;
    }
}
Exemple #6
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/* compile the C file opened in 'file'. Return non zero if errors. */
static int tcc_compile(TCCState *s1)
{
	Sym *define_start;

#ifdef INC_DEBUG
	printf ("%s: **** new file\n", file->filename);
#endif
	preprocess_init (s1);

	funcname = "";

	/* define some often used types */
	int8_type.t = VT_INT8;
	int16_type.t = VT_INT16;
	int32_type.t = VT_INT32;
	int64_type.t = VT_INT64;

	char_pointer_type.t = VT_INT8;
	mk_pointer (&char_pointer_type);

	if (tcc_state->bits != 64) {
		size_type.t = VT_INT32;
	} else {
		size_type.t = VT_INT64;
	}

	func_old_type.t = VT_FUNC;
	func_old_type.ref = sym_push (SYM_FIELD, &int32_type, FUNC_CDECL, FUNC_OLD);

// FIXME: Should depend on the target options too
#ifdef TCC_TARGET_ARM
	arm_init_types ();
#endif

#if 0
	/* define 'void *alloca(unsigned int)' builtin function */
	{
		Sym *s1;

		p = anon_sym++;
		sym = sym_push (p, mk_pointer (VT_VOID), FUNC_CDECL, FUNC_NEW);
		s1 = sym_push (SYM_FIELD, VT_UNSIGNED | VT_INT, 0, 0);
		s1->next = NULL;
		sym->next = s1;
		sym_push (TOK_alloca, VT_FUNC | (p << VT_STRUCT_SHIFT), VT_CONST, 0);
	}
#endif

	define_start = define_stack;
	nocode_wanted = 1;

	if (setjmp (s1->error_jmp_buf) == 0) {
		s1->nb_errors = 0;
		s1->error_set_jmp_enabled = 1;

		ch = file->buf_ptr[0];
		tok_flags = TOK_FLAG_BOL | TOK_FLAG_BOF;
		parse_flags = PARSE_FLAG_PREPROCESS | PARSE_FLAG_TOK_NUM;
		// pvtop = vtop;
		next ();
		decl (VT_CONST);
		if (tok != TOK_EOF) {
			expect ("declaration");
		}
#if 0
		if (pvtop != vtop) {
			fprintf (stderr, "internal compiler error:"
				" vstack leak? (%d)", vtop - pvtop);
		}
#endif
	}

	s1->error_set_jmp_enabled = 0;

	/* reset define stack, but leave -Dsymbols (may be incorrect if
	   they are undefined) */
	free_defines (define_start);

	sym_pop (&global_stack, NULL);
	sym_pop (&local_stack, NULL);

	return s1->nb_errors != 0? -1: 0;
}