1 /* Target definitions for GNU compiler for Intel 80386 running Interix
2 Parts Copyright (C) 1991, 1999, 2000 Free Software Foundation, Inc.
5 by Douglas B. Rupp (drupp@cs.washington.edu).
6 by Ron Guilmette (rfg@netcom.com).
7 by Donn Terry (donn@softway.com).
8 by Mumit Khan (khan@xraylith.wisc.edu).
10 This file is part of GNU CC.
12 GNU CC is free software; you can redistribute it and/or modify
13 it under the terms of the GNU General Public License as published by
14 the Free Software Foundation; either version 2, or (at your option)
17 GNU CC is distributed in the hope that it will be useful,
18 but WITHOUT ANY WARRANTY; without even the implied warranty of
19 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 GNU General Public License for more details.
22 You should have received a copy of the GNU General Public License
23 along with GNU CC; see the file COPYING. If not, write to
24 the Free Software Foundation, 59 Temple Place - Suite 330,
25 Boston, MA 02111-1307, USA. */
27 #define YES_UNDERSCORES
29 /* YES_UNDERSCORES must preceed gas.h */
31 /* The rest must follow. */
33 #define DBX_DEBUGGING_INFO
34 #define SDB_DEBUGGING_INFO
35 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
37 #define HANDLE_SYSV_PRAGMA
38 #undef HANDLE_PRAGMA_WEAK /* until the link format can handle it */
40 /* By default, target has a 80387, uses IEEE compatible arithmetic,
41 and returns float values in the 387 and needs stack probes
42 We also align doubles to 64-bits for MSVC default compatibility */
43 #undef TARGET_SUBTARGET_DEFAULT
44 #define TARGET_SUBTARGET_DEFAULT \
45 (MASK_80387 | MASK_IEEE_FP | MASK_FLOAT_RETURNS | MASK_STACK_PROBE | \
48 #undef TARGET_CPU_DEFAULT
49 #define TARGET_CPU_DEFAULT 2 /* 486 */
51 #define WCHAR_UNSIGNED 1
52 #define WCHAR_TYPE_SIZE 16
53 #define WCHAR_TYPE "short unsigned int"
55 /* WinNT (and thus Interix) use unsigned int */
56 #define SIZE_TYPE "unsigned int"
58 #define ASM_LOAD_ADDR(loc, reg) " leal " #loc "," #reg "\n"
60 /* cpp handles __STDC__ */
62 #define CPP_PREDEFINES " \
65 -D_M_IX86=300 -D_X86_=1 \
66 -D__stdcall=__attribute__((__stdcall__)) \
67 -D__cdecl=__attribute__((__cdecl__)) \
68 -Asystem=unix -Asystem=interix"
71 /* Write out the correct language type definition for the header files.
72 Unless we have assembler language, write out the symbols for C.
73 cpp_cpu is an Intel specific variant. See i386.h
74 mieee is an Alpha specific variant. Cross polination a bad idea.
77 %{!.S: -D__LANGUAGE_C__ -D__LANGUAGE_C %{!ansi:-DLANGUAGE_C}} \
78 %{.S: -D__LANGUAGE_ASSEMBLY__ -D__LANGUAGE_ASSEMBLY %{!ansi:-DLANGUAGE_ASSEMBLY}} \
79 %{.cc: -D__LANGUAGE_C_PLUS_PLUS__ -D__LANGUAGE_C_PLUS_PLUS -D__cplusplus} \
80 %{.cxx: -D__LANGUAGE_C_PLUS_PLUS__ -D__LANGUAGE_C_PLUS_PLUS -D__cplusplus} \
81 %{.C: -D__LANGUAGE_C_PLUS_PLUS__ -D__LANGUAGE_C_PLUS_PLUS -D__cplusplus} \
82 %{.m: -D__LANGUAGE_OBJECTIVE_C__ -D__LANGUAGE_OBJECTIVE_C} \
85 %{posix:-D_POSIX_SOURCE} \
86 -isystem %$INTERIX_ROOT/usr/include"
89 #define TARGET_VERSION fprintf (stderr, " (i386 Interix)");
91 /* The global __fltused is necessary to cause the printf/scanf routines
92 for outputting/inputting floating point numbers to be loaded. Since this
93 is kind of hard to detect, we just do it all the time. */
98 #define ASM_FILE_START(FILE) \
99 do { fprintf (FILE, "\t.file\t"); \
100 output_quoted_string (FILE, dump_base_name); \
101 fprintf (FILE, "\n"); \
102 fprintf (FILE, ".global\t__fltused\n"); \
105 /* A table of bytes codes used by the ASM_OUTPUT_ASCII and
106 ASM_OUTPUT_LIMITED_STRING macros. Each byte in the table
107 corresponds to a particular byte value [0..255]. For any
108 given byte value, if the value in the corresponding table
109 position is zero, the given character can be output directly.
110 If the table value is 1, the byte must be output as a \ooo
111 octal escape. If the tables value is anything else, then the
112 byte value should be output as a \ followed by the value
113 in the table. Note that we can use standard UN*X escape
114 sequences for many control characters, but we don't use
115 \a to represent BEL because some svr4 assemblers (e.g. on
116 the i386) don't know about that. Also, we don't use \v
117 since some versions of gas, such as 2.2 did not accept it. */
120 "\1\1\1\1\1\1\1\1btn\1fr\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\
121 \0\0\"\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\
122 \0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\\\0\0\0\
123 \0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\1\
124 \1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\
125 \1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\
126 \1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\
127 \1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1"
129 /* Some svr4 assemblers have a limit on the number of characters which
130 can appear in the operand of a .string directive. If your assembler
131 has such a limitation, you should define STRING_LIMIT to reflect that
132 limit. Note that at least some svr4 assemblers have a limit on the
133 actual number of bytes in the double-quoted string, and that they
134 count each character in an escape sequence as one byte. Thus, an
135 escape sequence like \377 would count as four bytes.
137 If your target assembler doesn't support the .string directive, you
138 should define this to zero.
141 #define STRING_LIMIT ((unsigned) 256)
143 #define STRING_ASM_OP "\t.string\t"
145 /* The routine used to output NUL terminated strings. We use a special
146 version of this for most svr4 targets because doing so makes the
147 generated assembly code more compact (and thus faster to assemble)
148 as well as more readable, especially for targets like the i386
149 (where the only alternative is to output character sequences as
150 comma separated lists of numbers). */
152 #define ASM_OUTPUT_LIMITED_STRING(FILE, STR) \
155 register const unsigned char *_limited_str = \
156 (const unsigned char *) (STR); \
157 register unsigned ch; \
158 fprintf ((FILE), "%s\"", STRING_ASM_OP); \
159 for (; (ch = *_limited_str); _limited_str++) \
161 register int escape = ESCAPES[ch]; \
168 fprintf ((FILE), "\\%03o", ch); \
171 putc ('\\', (FILE)); \
172 putc (escape, (FILE)); \
176 fprintf ((FILE), "\"\n"); \
180 /* The routine used to output sequences of byte values. We use a special
181 version of this for most svr4 targets because doing so makes the
182 generated assembly code more compact (and thus faster to assemble)
183 as well as more readable. Note that if we find subparts of the
184 character sequence which end with NUL (and which are shorter than
185 STRING_LIMIT) we output those using ASM_OUTPUT_LIMITED_STRING. */
187 #undef ASM_OUTPUT_ASCII
188 #define ASM_OUTPUT_ASCII(FILE, STR, LENGTH) \
191 register const unsigned char *_ascii_bytes = \
192 (const unsigned char *) (STR); \
193 register const unsigned char *limit = _ascii_bytes + (LENGTH); \
194 register unsigned bytes_in_chunk = 0; \
195 for (; _ascii_bytes < limit; _ascii_bytes++) \
197 register const unsigned char *p; \
198 if (bytes_in_chunk >= 64) \
200 fputc ('\n', (FILE)); \
201 bytes_in_chunk = 0; \
203 for (p = _ascii_bytes; p < limit && *p != '\0'; p++) \
205 if (p < limit && (p - _ascii_bytes) <= STRING_LIMIT) \
207 if (bytes_in_chunk > 0) \
209 fputc ('\n', (FILE)); \
210 bytes_in_chunk = 0; \
212 ASM_OUTPUT_LIMITED_STRING ((FILE), _ascii_bytes); \
217 if (bytes_in_chunk == 0) \
218 fprintf ((FILE), "\t.byte\t"); \
220 fputc (',', (FILE)); \
221 fprintf ((FILE), "0x%02x", *_ascii_bytes); \
222 bytes_in_chunk += 5; \
225 if (bytes_in_chunk > 0) \
226 fprintf ((FILE), "\n"); \
230 /* Emit code to check the stack when allocating more that 4000
233 #define CHECK_STACK_LIMIT 0x1000
235 /* the following are OSF linker (not gld) specific... we don't want them */
236 #undef HAS_INIT_SECTION
237 #undef LD_INIT_SWITCH
238 #undef LD_FINI_SWITCH
241 /* Note that there appears to be two different ways to support const
242 sections at the moment. You can either #define the symbol
243 READONLY_DATA_SECTION (giving it some code which switches to the
244 readonly data section) or else you can #define the symbols
245 EXTRA_SECTIONS, EXTRA_SECTION_FUNCTIONS, SELECT_SECTION, and
246 SELECT_RTX_SECTION. We do both here just to be on the safe side. */
248 #define USE_CONST_SECTION 1
250 #define CONST_SECTION_ASM_OP "\t.section\t.rdata,\"r\""
252 /* A default list of other sections which we might be "in" at any given
253 time. For targets that use additional sections (e.g. .tdesc) you
254 should override this definition in the target-specific file which
255 includes this file. */
257 #undef EXTRA_SECTIONS
258 #define EXTRA_SECTIONS in_const
260 /* A default list of extra section function definitions. For targets
261 that use additional sections (e.g. .tdesc) you should override this
262 definition in the target-specific file which includes this file. */
264 #undef EXTRA_SECTION_FUNCTIONS
265 #define EXTRA_SECTION_FUNCTIONS \
266 CONST_SECTION_FUNCTION
268 #undef READONLY_DATA_SECTION
269 #define READONLY_DATA_SECTION() const_section ()
271 #define CONST_SECTION_FUNCTION \
275 if (!USE_CONST_SECTION) \
277 else if (in_section != in_const) \
279 fprintf (asm_out_file, "%s\n", CONST_SECTION_ASM_OP); \
280 in_section = in_const; \
284 /* The MS compilers take alignment as a number of bytes, so we do as well */
285 #undef ASM_OUTPUT_ALIGN
286 #define ASM_OUTPUT_ALIGN(FILE,LOG) \
287 if ((LOG)!=0) fprintf ((FILE), "\t.balign %d\n", 1<<(LOG))
289 /* The linker will take care of this, and having them causes problems with
290 ld -r (specifically -rU). */
291 #define CTOR_LISTS_DEFINED_EXTERNALLY 1
293 #define SET_ASM_OP "\t.set\t"
294 /* Output a definition (implements alias) */
295 #define ASM_OUTPUT_DEF(FILE,LABEL1,LABEL2) \
298 fprintf ((FILE), "%s", SET_ASM_OP); \
299 assemble_name (FILE, LABEL1); \
300 fprintf (FILE, ","); \
301 assemble_name (FILE, LABEL2); \
302 fprintf (FILE, "\n"); \
306 #define HOST_PTR_PRINTF "%p"
307 #define HOST_PTR_AS_INT unsigned long
309 #define PCC_BITFIELD_TYPE_MATTERS 1
310 #define PCC_BITFIELD_TYPE_TEST TYPE_NATIVE(rec)
311 #define GROUP_BITFIELDS_BY_ALIGN TYPE_NATIVE(rec)
313 /* The following two flags are usually "off" for i386, because some non-gnu
314 tools (for the i386) don't handle them. However, we don't have that
317 /* Forward references to tags are allowed. */
318 #define SDB_ALLOW_FORWARD_REFERENCES
320 /* Unknown tags are also allowed. */
321 #define SDB_ALLOW_UNKNOWN_REFERENCES
323 /* The integer half of this list needs to be constant. However, there's
324 a lot of disagreement about what the floating point adjustments should
325 be. We pick one that works with gdb. (The underlying problem is
326 what to do about the segment registers. Since we have access to them
327 from /proc, we'll allow them to be accessed in gdb, even tho the
328 gcc compiler can't generate them. (There's some evidence that
329 MSVC does, but possibly only for certain special "canned" sequences.) */
331 #undef DBX_REGISTER_NUMBER
332 #define DBX_REGISTER_NUMBER(n) \
333 (TARGET_64BIT ? dbx64_register_map[n] \
342 : ((n) >= FIRST_STACK_REG && (n) <= LAST_STACK_REG) ? (n)+8 \
345 /* Define this macro if references to a symbol must be treated
346 differently depending on something about the variable or
347 function named by the symbol (such as what section it is in).
349 Apply stddef, handle (as yet unimplemented) pic.
351 stddef renaming does NOT apply to Alpha. */
353 char *gen_stdcall_suffix ();
355 #undef ENCODE_SECTION_INFO
356 #define ENCODE_SECTION_INFO(DECL) \
361 rtx rtl = (TREE_CODE_CLASS (TREE_CODE (DECL)) != 'd' \
362 ? TREE_CST_RTL (DECL) : DECL_RTL (DECL)); \
363 SYMBOL_REF_FLAG (XEXP (rtl, 0)) \
364 = (TREE_CODE_CLASS (TREE_CODE (DECL)) != 'd' \
365 || ! TREE_PUBLIC (DECL)); \
367 if (TREE_CODE (DECL) == FUNCTION_DECL) \
368 if (lookup_attribute ("stdcall", \
369 TYPE_ATTRIBUTES (TREE_TYPE (DECL)))) \
370 XEXP (DECL_RTL (DECL), 0) = \
371 gen_rtx (SYMBOL_REF, Pmode, gen_stdcall_suffix (DECL)); \
375 /* This macro gets just the user-specified name
376 out of the string in a SYMBOL_REF. Discard
377 trailing @[NUM] encoded by ENCODE_SECTION_INFO. */
378 #undef STRIP_NAME_ENCODING
379 #define STRIP_NAME_ENCODING(VAR,SYMBOL_NAME) \
382 const char *_name = SYMBOL_NAME; \
383 for (_p = _name; *_p && *_p != '@'; ++_p) \
387 int _len = _p - _name; \
388 char *_new_name = (char *) alloca (_len + 1); \
389 strncpy (_new_name, _name, _len); \
390 _new_name[_len] = '\0'; \
398 /* Turn this back on when the linker is updated to handle grouped
399 .data$ sections correctly. See corresponding note in i386/interix.c.
402 /* Define this macro if in some cases global symbols from one translation
403 unit may not be bound to undefined symbols in another translation unit
404 without user intervention. For instance, under Microsoft Windows
405 symbols must be explicitly imported from shared libraries (DLLs). */
406 #define MULTIPLE_SYMBOL_SPACES
408 extern void i386_pe_unique_section ();
409 #define UNIQUE_SECTION(DECL,RELOC) i386_pe_unique_section (DECL, RELOC)
411 #define SUPPORTS_ONE_ONLY 1
413 /* Switch into a generic section. */
414 #define TARGET_ASM_NAMED_SECTION default_pe_asm_named_section
417 /* DWARF2 Unwinding doesn't work with exception handling yet. */
418 #define DWARF2_UNWIND_INFO 0
420 /* Don't assume anything about the header files. */
421 #define NO_IMPLICIT_EXTERN_C