1 /* Target definitions for GCC for Intel 80386 running Interix
2 Parts Copyright (C) 1991, 1999, 2000, 2002, 2003, 2004, 2007, 2008, 2009,
3 2010, 2011, 2012 Free Software Foundation, Inc.
6 by Douglas B. Rupp (drupp@cs.washington.edu).
7 by Ron Guilmette (rfg@netcom.com).
8 by Donn Terry (donn@softway.com).
9 by Mumit Khan (khan@xraylith.wisc.edu).
11 This file is part of GCC.
13 GCC is free software; you can redistribute it and/or modify
14 it under the terms of the GNU General Public License as published by
15 the Free Software Foundation; either version 3, or (at your option)
18 GCC is distributed in the hope that it will be useful,
19 but WITHOUT ANY WARRANTY; without even the implied warranty of
20 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 GNU General Public License for more details.
23 You should have received a copy of the GNU General Public License
24 along with GCC; see the file COPYING3. If not see
25 <http://www.gnu.org/licenses/>. */
27 /* Note: Interix doesn't support user-written DLLs (use conventional
28 shared libs (.so) instead). Thus a lot of the stuff that might apply
29 about dllimport/dllexport and the like does not apply here. */
33 /* Names to predefine in the preprocessor for this target machine. */
35 #define DBX_DEBUGGING_INFO 1
36 #define SDB_DEBUGGING_INFO 1
37 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
39 /* Our strategy for finding global constructors is a bit different, although
41 #define DO_GLOBAL_CTORS_BODY \
44 unsigned long nptrs; \
47 " .section .ctor_head, \"rw\"\n" \
50 ASM_LOAD_ADDR(1b,%0) \
51 : "=r" (p) : : "cc"); \
52 for (nptrs = 0; p[nptrs] != 0; nptrs++); \
53 for (i = nptrs-1; i >= 0; i--) \
57 #define DO_GLOBAL_DTORS_BODY \
61 " .section .dtor_head, \"rw\"\n" \
64 ASM_LOAD_ADDR(1b,%0) \
65 : "=r" (p) : : "cc"); \
73 /* We don't use the "usual" push-an-address solution. */
74 #undef TARGET_ASM_CONSTRUCTOR
76 #undef SUBTARGET_SWITCHES
77 #define SUBTARGET_SWITCHES \
78 { "ms-bitfields", MASK_MS_BITFIELD_LAYOUT, N_("Use native (MS) bitfield layout") }, \
79 { "no-ms-bitfields", -MASK_MS_BITFIELD_LAYOUT, N_("Use gcc default bitfield layout") },
83 %{!shared:%{!dynamic:-lc -lpsxdll \
85 %{!G:%{!dynamic:-lc -lpsxdll \
87 %{dynamic:-lc -lpsxdll \
92 #define LINK_SPEC "%{!shared:-stack 0x4000000,0x10000} \
94 %{dynamic:-Bdynamic} \
96 %{shared:--shared -Bdynamic} \
97 %{G:--shared -Bdynamic} \
98 %{symbolic:--shared -Bsymbolic -Bdynamic} \
99 %{rpath*:--rpath %*} \
102 #undef STARTFILE_SPEC
103 #define STARTFILE_SPEC \
104 "%{!shared:%{pg:gcrt0%O%s}%{!pg:%{p:mcrt0%O%s}%{!p:crt0%O%s}}} %{shared:crti%O%s}"
106 #define TARGET_DECLSPEC 1
108 /* cpp handles __STDC__ */
109 #define TARGET_OS_CPP_BUILTINS() \
112 builtin_define ("__INTERIX"); \
113 builtin_define ("_M_IX86=300"); \
114 builtin_define ("_X86_=1"); \
115 builtin_define ("__stdcall=__attribute__((__stdcall__))"); \
116 builtin_define ("__cdecl=__attribute__((__cdecl__))"); \
117 builtin_define ("__declspec(x)=__attribute__((x))"); \
118 builtin_assert ("system=unix"); \
119 builtin_assert ("system=interix"); \
120 if (preprocessing_asm_p ()) \
121 builtin_define_std ("LANGUAGE_ASSEMBLY"); \
124 builtin_define_std ("LANGUAGE_C"); \
125 if (c_dialect_cxx ()) \
126 builtin_define_std ("LANGUAGE_C_PLUS_PLUS"); \
127 if (c_dialect_objc ()) \
128 builtin_define_std ("LANGUAGE_OBJECTIVE_C"); \
134 #define CPP_SPEC "%{posix:-D_POSIX_SOURCE}"
136 #define SIZE_TYPE "unsigned int"
137 #define PTRDIFF_TYPE "int"
138 #define WCHAR_TYPE "short unsigned int"
139 #define WCHAR_TYPE_SIZE 16
141 /* Turn off long double being 96 bits. */
142 #undef LONG_DOUBLE_TYPE_SIZE
143 #define LONG_DOUBLE_TYPE_SIZE 64
144 #undef LIBGCC2_LONG_DOUBLE_TYPE_SIZE
145 #define LIBGCC2_LONG_DOUBLE_TYPE_SIZE 64
147 /* The following are needed for us to be able to use winnt.c, but are not
148 otherwise meaningful to Interix. (The functions that use these are
149 never called because we don't do DLLs.) */
150 #define TARGET_NOP_FUN_DLLIMPORT 1
151 #define drectve_section() /* nothing */
154 #define EH_FRAME_IN_DATA_SECTION
156 #define READONLY_DATA_SECTION_ASM_OP "\t.section\t.rdata,\"r\""
158 /* Define this macro if references to a symbol must be treated
159 differently depending on something about the variale or
160 function named by the symbol (such as what section it is in). */
162 #undef TARGET_ENCODE_SECTION_INFO
163 #define TARGET_ENCODE_SECTION_INFO i386_pe_encode_section_info
164 #undef TARGET_STRIP_NAME_ENCODING
165 #define TARGET_STRIP_NAME_ENCODING i386_pe_strip_name_encoding_full
167 /* Emit code to check the stack when allocating more that 4000
170 #define CHECK_STACK_LIMIT 4000
172 /* By default, target has a 80387, uses IEEE compatible arithmetic,
173 and returns float values in the 387 and needs stack probes
174 We also align doubles to 64-bits forMSVC default compatibility
175 Ditto for bitfields. */
176 #undef TARGET_SUBTARGET_DEFAULT
177 #define TARGET_SUBTARGET_DEFAULT \
178 (MASK_80387 | MASK_IEEE_FP | MASK_FLOAT_RETURNS | MASK_STACK_PROBE | \
179 MASK_ALIGN_DOUBLE | MASK_MS_BITFIELD_LAYOUT)
181 /* The MS compilers take alignment as a number of bytes, so we do as well */
182 #undef ASM_OUTPUT_ALIGN
183 #define ASM_OUTPUT_ALIGN(FILE,LOG) \
184 if ((LOG)!=0) fprintf ((FILE), "\t.balign %d\n", 1<<(LOG))
187 /* Define this macro if in some cases global symbols from one translation
188 unit may not be bound to undefined symbols in another translation unit
189 without user intervention. For instance, under Microsoft Windows
190 symbols must be explicitly imported from shared libraries (DLLs). */
192 * Old gcc(3.3) did not have 1 here
194 #define MULTIPLE_SYMBOL_SPACES 1
196 extern void i386_pe_unique_section PARAMS ((tree, int));
197 #define TARGET_ASM_UNIQUE_SECTION i386_pe_unique_section
199 /* Switch into a generic section. */
200 #define TARGET_ASM_NAMED_SECTION default_pe_asm_named_section
202 /* Select attributes for named sections. */
203 #define TARGET_SECTION_TYPE_FLAGS i386_pe_section_type_flags
205 /* Write the extra assembler code needed to declare a function
206 properly. If we are generating SDB debugging information, this
207 will happen automatically, so we only need to handle other cases. */
208 #undef ASM_DECLARE_FUNCTION_NAME
209 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \
212 if (write_symbols != SDB_DEBUG) \
213 i386_pe_declare_function_type (FILE, NAME, TREE_PUBLIC (DECL)); \
214 ASM_OUTPUT_LABEL (FILE, NAME); \
218 /* Add an external function to the list of functions to be declared at
219 the end of the file. */
220 #define ASM_OUTPUT_EXTERNAL(FILE, DECL, NAME) \
223 if (TREE_CODE (DECL) == FUNCTION_DECL) \
224 i386_pe_record_external_function (DECL, NAME); \
228 /* Declare the type properly for any external libcall. */
229 #define ASM_OUTPUT_EXTERNAL_LIBCALL(FILE, FUN) \
230 i386_pe_declare_function_type (FILE, XSTR (FUN, 0), 1)
232 /* This says out to put a global symbol in the BSS section. */
233 #undef ASM_OUTPUT_ALIGNED_BSS
234 #define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \
235 asm_output_aligned_bss ((FILE), (DECL), (NAME), (SIZE), (ALIGN))
237 /* Don't assume anything about the header files. */
238 #define NO_IMPLICIT_EXTERN_C
240 /* External function declarations. */
241 extern void i386_pe_record_external_function (tree, const char *);
242 extern void i386_pe_declare_function_type (FILE *, const char *, int);
243 extern void i386_pe_record_exported_symbol (const char *, int);
244 extern void i386_pe_asm_file_end (FILE *);
246 /* For Win32 ABI compatibility */
247 #undef DEFAULT_PCC_STRUCT_RETURN
248 #define DEFAULT_PCC_STRUCT_RETURN 0
250 /* A bitfield declared as `int' forces `int' alignment for the struct. */
251 #undef PCC_BITFIELD_TYPE_MATTERS
252 #define PCC_BITFIELD_TYPE_MATTERS 1
254 /* Enable alias attribute support. */
256 #define SET_ASM_OP "\t.set\t"
259 /* Note that there appears to be two different ways to support const
260 sections at the moment. You can either #define the symbol
261 READONLY_DATA_SECTION (giving it some code which switches to the
262 readonly data section) or else you can #define the symbols
263 EXTRA_SECTIONS, EXTRA_SECTION_FUNCTIONS, SELECT_SECTION, and
264 SELECT_RTX_SECTION. We do both here just to be on the safe side. */
266 #define USE_CONST_SECTION 1
268 /* The linker will take care of this, and having them causes problems with
269 ld -r (specifically -rU). */
270 #define CTOR_LISTS_DEFINED_EXTERNALLY 1
272 /* Output a definition (implements alias) */
273 #define ASM_OUTPUT_DEF(FILE,LABEL1,LABEL2) \
276 fputs (SET_ASM_OP, (FILE)); \
277 assemble_name (FILE, LABEL1); \
278 fputc (',', (FILE)); \
279 assemble_name (FILE, LABEL2); \
280 fputc ('\n', (FILE)); \
284 #define HOST_PTR_AS_INT unsigned long
286 /* The following two flags are usually "off" for i386, because some non-gnu
287 tools (for the i386) don't handle them. However, we don't have that
290 /* Forward references to tags are allowed. */
291 #define SDB_ALLOW_FORWARD_REFERENCES
292 /* Unknown tags are also allowed. */
293 #define SDB_ALLOW_UNKNOWN_REFERENCES
294 /* DWARF2 Unwinding doesn't work with exception handling yet. */
295 #define DWARF2_UNWIND_INFO 0
296 /* MSVC returns structs of up to 8 bytes via registers. */
298 #undef SUBTARGET_RETURN_IN_MEMORY
299 #define SUBTARGET_RETURN_IN_MEMORY(TYPE, FNTYPE) \
300 (TYPE_MODE (TYPE) == BLKmode || \
301 (AGGREGATE_TYPE_P (TYPE) && int_size_in_bytes(TYPE) > 8 ))
303 #define ASM_LOAD_ADDR(loc, reg) " leal " #loc "," #reg "\n"
305 /* The integer half of this list needs to be constant. However, there's
306 a lot of disagreement about what the floating point adjustments should
307 be. We pick one that works with gdb. (The underlying problem is
308 what to do about the segment registers. Since we have access to them
309 from /proc, we'll allow them to be accessed in gdb, even tho the
310 gcc compiler can't generate them. (There's some evidence that
311 MSVC does, but possibly only for certain special "canned" sequences.) */
313 #undef DBX_REGISTER_NUMBER
314 #define DBX_REGISTER_NUMBER(n) \
315 (TARGET_64BIT ? dbx64_register_map[n] \
316 : (n) == 0 ? (int) 0 \
317 : (n) == 1 ? (int) 2 \
318 : (n) == 2 ? (int) 1 \
319 : (n) == 3 ? (int) 3 \
320 : (n) == 4 ? (int) 6 \
321 : (n) == 5 ? (int) 7 \
322 : (n) == 6 ? (int) 5 \
323 : (n) == 7 ? (int) 4 \
324 : ((n) >= FIRST_STACK_REG && (n) <= LAST_STACK_REG) ? (int) (n)+8 \
327 #define EH_FRAME_IN_DATA_SECTION
329 /* the following are OSF linker (not gld) specific... we don't want them */
330 #undef HAS_INIT_SECTION
331 #undef LD_INIT_SWITCH
332 #undef LD_FINI_SWITCH
334 /* The following are needed for us to be able to use winnt.c, but are not
335 otherwise meaningful to Interix. (The functions that use these are
336 never called because we don't do DLLs.) */
337 #define TARGET_NOP_FUN_DLLIMPORT 1
338 #define I386_PE_STRIP_ENCODING(SYM_NAME) \
339 ((SYM_NAME) + ((SYM_NAME)[0] == '@' \
340 ? ((SYM_NAME)[3] == '*' ? 4 : 3) : 0) \
341 + ((SYM_NAME)[0] == '*' ? 1 : 0))
343 #define drectve_section() /* nothing */