1/* Target definitions for GCC for Intel 80386 running Interix 2 Parts Copyright (C) 1991-2015 Free Software Foundation, Inc. 3 4 Parts: 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). 9 10This file is part of GCC. 11 12GCC is free software; you can redistribute it and/or modify 13it under the terms of the GNU General Public License as published by 14the Free Software Foundation; either version 3, or (at your option) 15any later version. 16 17GCC is distributed in the hope that it will be useful, 18but WITHOUT ANY WARRANTY; without even the implied warranty of 19MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 20GNU General Public License for more details. 21 22You should have received a copy of the GNU General Public License 23along with GCC; see the file COPYING3. If not see 24<http://www.gnu.org/licenses/>. */ 25 26/* Note: Interix doesn't support user-written DLLs (use conventional 27 shared libs (.so) instead). Thus a lot of the stuff that might apply 28 about dllimport/dllexport and the like does not apply here. */ 29 30#include <stdio.h> 31 32/* Names to predefine in the preprocessor for this target machine. */ 33 34#define DBX_DEBUGGING_INFO 1 35#define SDB_DEBUGGING_INFO 1 36#define PREFERRED_DEBUGGING_TYPE DBX_DEBUG 37 38/* Our strategy for finding global constructors is a bit different, although 39 not a lot. */ 40#define DO_GLOBAL_CTORS_BODY \ 41do { \ 42 int i; \ 43 unsigned long nptrs; \ 44 func_ptr *p; \ 45 asm( \ 46 " .section .ctor_head, \"rw\"\n" \ 47 "1:\n" \ 48 " .text \n" \ 49 ASM_LOAD_ADDR(1b,%0) \ 50 : "=r" (p) : : "cc"); \ 51 for (nptrs = 0; p[nptrs] != 0; nptrs++); \ 52 for (i = nptrs-1; i >= 0; i--) \ 53 p[i] (); \ 54} while (0) 55 56#define DO_GLOBAL_DTORS_BODY \ 57do { \ 58 func_ptr *p; \ 59 asm( \ 60 " .section .dtor_head, \"rw\"\n" \ 61 "1:\n" \ 62 " .text \n" \ 63 ASM_LOAD_ADDR(1b,%0) \ 64 : "=r" (p) : : "cc"); \ 65 while (*p) \ 66 { \ 67 p++; \ 68 (*(p-1)) (); \ 69 } \ 70} while (0) 71 72/* We don't use the "usual" push-an-address solution. */ 73#undef TARGET_ASM_CONSTRUCTOR 74 75#undef SUBTARGET_SWITCHES 76#define SUBTARGET_SWITCHES \ 77{ "ms-bitfields", MASK_MS_BITFIELD_LAYOUT, N_("Use native (MS) bitfield layout") }, \ 78{ "no-ms-bitfields", -MASK_MS_BITFIELD_LAYOUT, N_("Use gcc default bitfield layout") }, 79 80#undef LIB_SPEC 81#define LIB_SPEC "\ 82 %{!shared:%{!dynamic:-lc -lpsxdll \ 83 }} \ 84 %{!G:%{!dynamic:-lc -lpsxdll \ 85 }} \ 86 %{dynamic:-lc -lpsxdll \ 87 } \ 88 %{v}" 89 90#undef LINK_SPEC 91#define LINK_SPEC "%{!shared:-stack 0x4000000,0x10000} \ 92 %{g} \ 93 %{dynamic:-Bdynamic} \ 94 %{static:-Bstatic} \ 95 %{shared:--shared -Bdynamic} \ 96 %{G:--shared -Bdynamic} \ 97 %{symbolic:--shared -Bsymbolic -Bdynamic} \ 98 %{rpath*:--rpath %*} \ 99 " 100 101#undef STARTFILE_SPEC 102#define STARTFILE_SPEC \ 103 "%{!shared:%{pg:gcrt0%O%s}%{!pg:%{p:mcrt0%O%s}%{!p:crt0%O%s}}} %{shared:crti%O%s}" 104 105#define TARGET_DECLSPEC 1 106 107/* cpp handles __STDC__ */ 108#define TARGET_OS_CPP_BUILTINS() \ 109 do \ 110 { \ 111 builtin_define ("__INTERIX"); \ 112 builtin_define ("_M_IX86=300"); \ 113 builtin_define ("_X86_=1"); \ 114 builtin_define ("__stdcall=__attribute__((__stdcall__))"); \ 115 builtin_define ("__cdecl=__attribute__((__cdecl__))"); \ 116 builtin_define ("__declspec(x)=__attribute__((x))"); \ 117 builtin_assert ("system=unix"); \ 118 builtin_assert ("system=interix"); \ 119 if (preprocessing_asm_p ()) \ 120 builtin_define_std ("LANGUAGE_ASSEMBLY"); \ 121 else \ 122 { \ 123 builtin_define_std ("LANGUAGE_C"); \ 124 if (c_dialect_cxx ()) \ 125 builtin_define_std ("LANGUAGE_C_PLUS_PLUS"); \ 126 if (c_dialect_objc ()) \ 127 builtin_define_std ("LANGUAGE_OBJECTIVE_C"); \ 128 } \ 129 } \ 130 while (0) 131 132#undef CPP_SPEC 133#define CPP_SPEC "%{posix:-D_POSIX_SOURCE}" 134 135#define SIZE_TYPE "unsigned int" 136#define PTRDIFF_TYPE "int" 137#define WCHAR_TYPE "short unsigned int" 138#define WCHAR_TYPE_SIZE 16 139 140/* Turn off long double being 96 bits. */ 141#undef LONG_DOUBLE_TYPE_SIZE 142#define LONG_DOUBLE_TYPE_SIZE 64 143 144#define IX86_NO_LIBGCC_TFMODE 145 146#undef TARGET_LIBC_HAS_FUNCTION 147#define TARGET_LIBC_HAS_FUNCTION no_c99_libc_has_function 148 149/* The following are needed for us to be able to use winnt.c, but are not 150 otherwise meaningful to Interix. (The functions that use these are 151 never called because we don't do DLLs.) */ 152#define TARGET_NOP_FUN_DLLIMPORT 1 153#define drectve_section() /* nothing */ 154 155 156#define EH_FRAME_IN_DATA_SECTION 157 158#define READONLY_DATA_SECTION_ASM_OP "\t.section\t.rdata,\"r\"" 159 160/* Define this macro if references to a symbol must be treated 161 differently depending on something about the variale or 162 function named by the symbol (such as what section it is in). */ 163 164#undef TARGET_ENCODE_SECTION_INFO 165#define TARGET_ENCODE_SECTION_INFO i386_pe_encode_section_info 166#undef TARGET_STRIP_NAME_ENCODING 167#define TARGET_STRIP_NAME_ENCODING i386_pe_strip_name_encoding_full 168 169/* Emit code to check the stack when allocating more that 4000 170 bytes in one go. */ 171 172#define CHECK_STACK_LIMIT 4000 173 174/* By default, target has a 80387, uses IEEE compatible arithmetic, 175 and returns float values in the 387 and needs stack probes 176 We also align doubles to 64-bits forMSVC default compatibility 177 Ditto for bitfields. */ 178#undef TARGET_SUBTARGET_DEFAULT 179#define TARGET_SUBTARGET_DEFAULT \ 180 (MASK_80387 | MASK_IEEE_FP | MASK_FLOAT_RETURNS | MASK_STACK_PROBE | \ 181 MASK_ALIGN_DOUBLE | MASK_MS_BITFIELD_LAYOUT) 182 183/* The MS compilers take alignment as a number of bytes, so we do as well */ 184#undef ASM_OUTPUT_ALIGN 185#define ASM_OUTPUT_ALIGN(FILE,LOG) \ 186 if ((LOG)!=0) fprintf ((FILE), "\t.balign %d\n", 1<<(LOG)) 187 188 189/* Define this macro if in some cases global symbols from one translation 190 unit may not be bound to undefined symbols in another translation unit 191 without user intervention. For instance, under Microsoft Windows 192 symbols must be explicitly imported from shared libraries (DLLs). */ 193/* 194 * Old gcc(3.3) did not have 1 here 195 */ 196#define MULTIPLE_SYMBOL_SPACES 1 197 198extern void i386_pe_unique_section (tree, int); 199#define TARGET_ASM_UNIQUE_SECTION i386_pe_unique_section 200 201/* Switch into a generic section. */ 202#define TARGET_ASM_NAMED_SECTION default_pe_asm_named_section 203 204/* Select attributes for named sections. */ 205#define TARGET_SECTION_TYPE_FLAGS i386_pe_section_type_flags 206 207/* Write the extra assembler code needed to declare a function 208 properly. If we are generating SDB debugging information, this 209 will happen automatically, so we only need to handle other cases. */ 210#undef ASM_DECLARE_FUNCTION_NAME 211#define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \ 212 do \ 213 { \ 214 if (write_symbols != SDB_DEBUG) \ 215 i386_pe_declare_function_type (FILE, NAME, TREE_PUBLIC (DECL)); \ 216 ASM_OUTPUT_LABEL (FILE, NAME); \ 217 } \ 218 while (0) 219 220/* Add an external function to the list of functions to be declared at 221 the end of the file. */ 222#define ASM_OUTPUT_EXTERNAL(FILE, DECL, NAME) \ 223 do \ 224 { \ 225 if (TREE_CODE (DECL) == FUNCTION_DECL) \ 226 i386_pe_record_external_function (DECL, NAME); \ 227 } \ 228 while (0) 229 230/* Declare the type properly for any external libcall. */ 231#define ASM_OUTPUT_EXTERNAL_LIBCALL(FILE, FUN) \ 232 i386_pe_declare_function_type (FILE, XSTR (FUN, 0), 1) 233 234/* This says out to put a global symbol in the BSS section. */ 235#undef ASM_OUTPUT_ALIGNED_BSS 236#define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \ 237 asm_output_aligned_bss ((FILE), (DECL), (NAME), (SIZE), (ALIGN)) 238 239/* Don't assume anything about the header files. */ 240#define NO_IMPLICIT_EXTERN_C 241 242/* External function declarations. */ 243extern void i386_pe_record_external_function (tree, const char *); 244extern void i386_pe_declare_function_type (FILE *, const char *, int); 245extern void i386_pe_record_exported_symbol (const char *, int); 246extern void i386_pe_asm_file_end (FILE *); 247 248/* For Win32 ABI compatibility */ 249#undef DEFAULT_PCC_STRUCT_RETURN 250#define DEFAULT_PCC_STRUCT_RETURN 0 251 252/* A bitfield declared as `int' forces `int' alignment for the struct. */ 253#undef PCC_BITFIELD_TYPE_MATTERS 254#define PCC_BITFIELD_TYPE_MATTERS 1 255 256/* Enable alias attribute support. */ 257#ifndef SET_ASM_OP 258#define SET_ASM_OP "\t.set\t" 259#endif 260 261/* Note that there appears to be two different ways to support const 262 sections at the moment. You can either #define the symbol 263 READONLY_DATA_SECTION (giving it some code which switches to the 264 readonly data section) or else you can #define the symbols 265 EXTRA_SECTIONS, EXTRA_SECTION_FUNCTIONS, SELECT_SECTION, and 266 SELECT_RTX_SECTION. We do both here just to be on the safe side. */ 267 268#define USE_CONST_SECTION 1 269 270/* The linker will take care of this, and having them causes problems with 271 ld -r (specifically -rU). */ 272#define CTOR_LISTS_DEFINED_EXTERNALLY 1 273 274/* Output a definition (implements alias) */ 275#define ASM_OUTPUT_DEF(FILE,LABEL1,LABEL2) \ 276do \ 277{ \ 278 fputs (SET_ASM_OP, (FILE)); \ 279 assemble_name (FILE, LABEL1); \ 280 fputc (',', (FILE)); \ 281 assemble_name (FILE, LABEL2); \ 282 fputc ('\n', (FILE)); \ 283 } \ 284while (0) 285 286#define HOST_PTR_AS_INT unsigned long 287 288/* The following two flags are usually "off" for i386, because some non-gnu 289 tools (for the i386) don't handle them. However, we don't have that 290 problem, so.... */ 291 292/* Forward references to tags are allowed. */ 293#define SDB_ALLOW_FORWARD_REFERENCES 294/* Unknown tags are also allowed. */ 295#define SDB_ALLOW_UNKNOWN_REFERENCES 296/* DWARF2 Unwinding doesn't work with exception handling yet. */ 297#define DWARF2_UNWIND_INFO 0 298/* MSVC returns structs of up to 8 bytes via registers. */ 299 300#undef SUBTARGET_RETURN_IN_MEMORY 301#define SUBTARGET_RETURN_IN_MEMORY(TYPE, FNTYPE) \ 302 (TYPE_MODE (TYPE) == BLKmode || \ 303 (AGGREGATE_TYPE_P (TYPE) && int_size_in_bytes(TYPE) > 8 )) 304 305#define ASM_LOAD_ADDR(loc, reg) " leal " #loc "," #reg "\n" 306 307/* The integer half of this list needs to be constant. However, there's 308 a lot of disagreement about what the floating point adjustments should 309 be. We pick one that works with gdb. (The underlying problem is 310 what to do about the segment registers. Since we have access to them 311 from /proc, we'll allow them to be accessed in gdb, even tho the 312 gcc compiler can't generate them. (There's some evidence that 313 MSVC does, but possibly only for certain special "canned" sequences.) */ 314 315#undef DBX_REGISTER_NUMBER 316#define DBX_REGISTER_NUMBER(n) \ 317(TARGET_64BIT ? dbx64_register_map[n] \ 318 : (n) == 0 ? (int) 0 \ 319 : (n) == 1 ? (int) 2 \ 320 : (n) == 2 ? (int) 1 \ 321 : (n) == 3 ? (int) 3 \ 322 : (n) == 4 ? (int) 6 \ 323 : (n) == 5 ? (int) 7 \ 324 : (n) == 6 ? (int) 5 \ 325 : (n) == 7 ? (int) 4 \ 326 : ((n) >= FIRST_STACK_REG && (n) <= LAST_STACK_REG) ? (int) (n)+8 \ 327 : (int) (-1)) 328 329#define EH_FRAME_IN_DATA_SECTION 330 331/* the following are OSF linker (not gld) specific... we don't want them */ 332#undef HAS_INIT_SECTION 333#undef LD_INIT_SWITCH 334#undef LD_FINI_SWITCH 335 336/* The following are needed for us to be able to use winnt.c, but are not 337 otherwise meaningful to Interix. (The functions that use these are 338 never called because we don't do DLLs.) */ 339#define TARGET_NOP_FUN_DLLIMPORT 1 340#define I386_PE_STRIP_ENCODING(SYM_NAME) \ 341 ((SYM_NAME) + ((SYM_NAME)[0] == '@' \ 342 ? ((SYM_NAME)[3] == '*' ? 4 : 3) : 0) \ 343 + ((SYM_NAME)[0] == '*' ? 1 : 0)) 344 345#define drectve_section() /* nothing */ 346 347