sco5.h revision 122180
1/* Definitions for Intel 386 running SCO Unix System V 3.2 Version 5. 2 Copyright (C) 1992, 1995, 1996, 1997, 1998, 1999, 2000, 2002, 2003 3 Free Software Foundation, Inc. 4 Contributed by Kean Johnston (jkj@sco.com) 5 6This file is part of GNU CC. 7 8GNU CC is free software; you can redistribute it and/or modify 9it under the terms of the GNU General Public License as published by 10the Free Software Foundation; either version 2, or (at your option) 11any later version. 12 13GNU CC is distributed in the hope that it will be useful, 14but WITHOUT ANY WARRANTY; without even the implied warranty of 15MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16GNU General Public License for more details. 17 18You should have received a copy of the GNU General Public License 19along with GNU CC; see the file COPYING. If not, write to 20the Free Software Foundation, 59 Temple Place - Suite 330, 21Boston, MA 02111-1307, USA. */ 22 23#undef TARGET_VERSION 24#define TARGET_VERSION fprintf (stderr, " (i386, SCO OpenServer 5 Syntax)"); 25 26/* The native link editor does not support linkonce stuff */ 27#define SUPPORTS_ONE_ONLY 0 28 29#undef ASM_QUAD 30 31#undef GLOBAL_ASM_OP 32#define GLOBAL_ASM_OP "\t.globl\t" 33 34#undef BSS_SECTION_ASM_OP 35#define BSS_SECTION_ASM_OP "\t.section\t.bss, \"aw\", @nobits" 36 37/* 38 * NOTE: We really do want CTORS_SECTION_ASM_OP and DTORS_SECTION_ASM_OP. 39 * Here's the reason why. If we dont define them, and we dont define them 40 * to always emit to the same section, the default is to emit to "named" 41 * ctors and dtors sections. This would be great if we could use GNU ld, 42 * but we can't. The native linker could possibly be trained to coalesce 43 * named ctors sections, but that hasn't been done either. So if we don't 44 * define these, many C++ ctors and dtors dont get run, because they never 45 * wind up in the ctors/dtors arrays. 46 */ 47#define CTORS_SECTION_ASM_OP "\t.section\t.ctors, \"aw\"" 48#define DTORS_SECTION_ASM_OP "\t.section\t.dtors, \"aw\"" 49 50#define TARGET_ASM_FILE_START_FILE_DIRECTIVE true 51#undef X86_FILE_START_VERSION_DIRECTIVE 52#define X86_FILE_START_VERSION_DIRECTIVE true 53 54/* A C statement (sans semicolon) to output to the stdio stream 55 FILE the assembler definition of uninitialized global DECL named 56 NAME whose size is SIZE bytes and alignment is ALIGN bytes. 57 Try to use asm_output_aligned_bss to implement this macro. */ 58 59#define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \ 60 asm_output_aligned_bss (FILE, DECL, NAME, SIZE, ALIGN) 61 62#undef DBX_REGISTER_NUMBER 63#define DBX_REGISTER_NUMBER(n) svr4_dbx_register_map[n] 64 65#define DWARF2_DEBUGGING_INFO 1 66#define DWARF_DEBUGGING_INFO 1 67#define DBX_DEBUGGING_INFO 1 68 69#undef PREFERRED_DEBUGGING_TYPE 70#define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG 71 72#undef DWARF2_UNWIND_INFO 73#define DWARF2_UNWIND_INFO 1 74 75#undef NO_IMPLICIT_EXTERN_C 76#define NO_IMPLICIT_EXTERN_C 1 77 78#undef SWITCH_TAKES_ARG 79#define SWITCH_TAKES_ARG(CHAR) \ 80 (DEFAULT_SWITCH_TAKES_ARG(CHAR) \ 81 || (CHAR) == 'h' \ 82 || (CHAR) == 'R' \ 83 || (CHAR) == 'Y' \ 84 || (CHAR) == 'z') 85 86#undef WORD_SWITCH_TAKES_ARG 87#define WORD_SWITCH_TAKES_ARG(STR) \ 88 (DEFAULT_WORD_SWITCH_TAKES_ARG (STR) \ 89 && strcmp (STR, "Tdata") && strcmp (STR, "Ttext") \ 90 && strcmp (STR, "Tbss")) 91 92#undef TARGET_SUBTARGET_DEFAULT 93#define TARGET_SUBTARGET_DEFAULT (MASK_80387 | MASK_IEEE_FP | MASK_FLOAT_RETURNS) 94 95/* 96 * Define sizes and types 97 */ 98#undef SIZE_TYPE 99#undef PTRDIFF_TYPE 100#undef WCHAR_TYPE 101#undef WCHAR_TYPE_SIZE 102#undef WINT_TYPE 103#undef LONG_DOUBLE_TYPE_SIZE 104#define SIZE_TYPE "unsigned int" 105#define PTRDIFF_TYPE "int" 106#define WCHAR_TYPE "long int" 107#define WCHAR_TYPE_SIZE BITS_PER_WORD 108#define WINT_TYPE "long int" 109#define LONG_DOUBLE_TYPE_SIZE 96 110 111/* 112 * New for multilib support. Set the default switches for multilib, 113 * which is -melf. 114 */ 115#define MULTILIB_DEFAULTS { "melf" } 116 117 118/* Please note that these specs may look messy but they are required in 119 order to emulate the SCO Development system as closely as possible. 120 With SCO Open Server 5.0, you now get the linker and assembler free, 121 so that is what these specs are targeted for. These utilities are 122 very argument sensitive: a space in the wrong place breaks everything. 123 So please forgive this mess. It works. 124 125 Parameters which can be passed to gcc, and their SCO equivalents: 126 GCC Parameter SCO Equivalent 127 -ansi -a ansi 128 -posix -a posix 129 -Xpg4 -a xpg4 130 -Xpg4plus -a xpg4plus 131 -Xods30 -a ods30 132 133 As with SCO, the default is XPG4 plus mode. SCO also allows you to 134 specify a C dialect with -Xt, -Xa, -Xc, -Xk and -Xm. These are passed 135 on to the assembler and linker in the same way that the SCO compiler 136 does. 137 138 SCO also allows you to compile, link and generate either ELF or COFF 139 binaries. With gcc, we now only support ELF mode. 140 141 GCC also requires that the user has installed OSS646, the Execution 142 Environment Update, or is running release 5.0.7 or later. This has 143 many fixes to the ELF link editor and assembler, and a considerably 144 improved libc and RTLD. 145 146 In terms of tool usage, we want to use the standard link editor always, 147 and either the GNU assembler or the native assembler. With OSS646 the 148 native assembler has grown up quite a bit. Some of the specs below 149 assume that /usr/gnu is the prefix for the GNU tools, because thats 150 where the SCO provided ones go. This is especially important for 151 include and library search path ordering. We want to look in /usr/gnu 152 first, becuase frequently people are linking against -lintl, and they 153 MEAN to link with gettext. What they get is the SCO intl library. Its 154 a REAL pity that GNU gettext chose that name; perhaps in a future 155 version they can be persuaded to change it to -lgnuintl and have a 156 link so that -lintl will work for other systems. The same goes for 157 header files. We want /usr/gnu/include searched for before the system 158 header files. Hence the -isystem /usr/gnu/include in the CPP_SPEC. 159 We get /usr/gnu/lib first by virtue of the MD_STARTFILE_PREFIX below. 160*/ 161 162#define MD_STARTFILE_PREFIX "/usr/gnu/lib/" 163#define MD_STARTFILE_PREFIX_1 "/usr/ccs/lib/" 164 165#if USE_GAS 166# define MD_EXEC_PREFIX "/usr/gnu/bin/" 167#else 168# define MD_EXEC_PREFIX "/usr/ccs/bin/elf/" 169#endif 170 171/* Always use the system linker, please. */ 172#ifndef DEFAULT_LINKER 173# define DEFAULT_LINKER "/usr/ccs/bin/elf/ld" 174#endif 175 176/* Set up assembler flags for PIC and ELF compilations */ 177#undef ASM_SPEC 178 179#if USE_GAS 180 /* Leave ASM_SPEC undefined so we pick up the master copy from gcc.c */ 181#else 182#define ASM_SPEC \ 183 "%{Ym,*} %{Yd,*} %{Wa,*:%*} \ 184 -E%{Xa:a}%{!Xa:%{Xc:c}%{!Xc:%{Xk:k}%{!Xk:%{Xt:t}%{!Xt:a}}}},%{ansi:ansi}%{!ansi:%{posix:posix}%{!posix:%{Xpg4:xpg4}%{!Xpg4:%{Xpg4plus:XPG4PLUS}%{!Xpg4plus:%{Xods30:ods30}%{!Xods30:XPG4PLUS}}}}},ELF %{Qn:} %{!Qy:-Qn}" 185#endif 186 187/* 188 * Use crti.o for shared objects, crt1.o for normal executables. Make sure 189 * to recognize both -G and -shared as a valid way of introducing shared 190 * library generation. This is important for backwards compatibility. 191 */ 192 193#undef STARTFILE_SPEC 194#define STARTFILE_SPEC \ 195 "%{pg:%e-pg not supported on this platform} \ 196 %{p:%{pp:%e-p and -pp specified - pick one}} \ 197 %{!shared:\ 198 %{!symbolic: \ 199 %{!G: \ 200 %{pp:pcrt1elf.o%s}%{p:mcrt1.o%s}%{!p:%{!pp:crt1.o%s}}}}} \ 201 crti.o%s \ 202 %{ansi:values-Xc.o%s} \ 203 %{!ansi: \ 204 %{traditional:values-Xt.o%s} \ 205 %{!traditional: \ 206 %{Xa:values-Xa.o%s} \ 207 %{!Xa:%{Xc:values-Xc.o%s} \ 208 %{!Xc:%{Xk:values-Xk.o%s} \ 209 %{!Xk:%{Xt:values-Xt.o%s} \ 210 %{!Xt:values-Xa.o%s}}}}}} \ 211 crtbegin.o%s" 212 213#undef ENDFILE_SPEC 214#define ENDFILE_SPEC \ 215 "crtend.o%s crtn.o%s" 216 217#define TARGET_OS_CPP_BUILTINS() \ 218 do \ 219 { \ 220 builtin_define ("__unix"); \ 221 builtin_define ("_SCO_DS"); \ 222 builtin_define ("_SCO_DS_LL"); \ 223 builtin_define ("_SCO_ELF"); \ 224 builtin_define ("_M_I386"); \ 225 builtin_define ("_M_XENIX"); \ 226 builtin_define ("_M_UNIX"); \ 227 builtin_assert ("system=svr3"); \ 228 if (flag_iso) \ 229 cpp_define (pfile, "_STRICT_ANSI"); \ 230 if (flag_pic) \ 231 { \ 232 builtin_define ("__PIC__"); \ 233 builtin_define ("__pic__"); \ 234 } \ 235 } \ 236 while (0) 237 238#undef CPP_SPEC 239#define CPP_SPEC "\ 240 -isystem /usr/gnu/include \ 241 %{pthread:-D_REENTRANT} \ 242 %{!Xods30:-D_STRICT_NAMES} \ 243 %{!ansi:%{!posix:%{!Xods30:-D_SCO_XPG_VERS=4}}} \ 244 %{ansi:-isystem include/ansi%s -isystem /usr/include/ansi} \ 245 %{!ansi: \ 246 %{posix:-isystem include/posix%s -isystem /usr/include/posix \ 247 -D_POSIX_C_SOURCE=2 -D_POSIX_SOURCE=1} \ 248 %{!posix:%{Xpg4:-isystem include/xpg4%s -isystem /usr/include/xpg4 \ 249 -D_XOPEN_SOURCE=1} \ 250 %{!Xpg4:-D_M_I86 -D_M_I86SM -D_M_INTERNAT -D_M_SDATA -D_M_STEXT \ 251 -D_M_BITFIELDS -D_M_SYS5 -D_M_SYSV -D_M_SYSIII \ 252 -D_M_WORDSWAP -Dunix -DM_I386 -DM_UNIX -DM_XENIX \ 253 %{Xods30:-isystem include/ods_30_compat%s \ 254 -isystem /usr/include/ods_30_compat \ 255 -D_SCO_ODS_30 -DM_I86 -DM_I86SM -DM_SDATA -DM_STEXT \ 256 -DM_BITFIELDS -DM_SYS5 -DM_SYSV -DM_INTERNAT -DM_SYSIII \ 257 -DM_WORDSWAP}}}} \ 258 %{scointl:-DM_INTERNAT -D_M_INTERNAT} \ 259 %{Xa:-D_SCO_C_DIALECT=1} \ 260 %{!Xa:%{Xc:-D_SCO_C_DIALECT=3} \ 261 %{!Xc:%{Xk:-D_SCO_C_DIALECT=4} \ 262 %{!Xk:%{Xt:-D_SCO_C_DIALECT=2} \ 263 %{!Xt:-D_SCO_C_DIALECT=1}}}}" 264 265#undef LINK_SPEC 266#define LINK_SPEC \ 267 "%{!shared:%{!symbolic:%{!G:-E%{Xa:a}%{!Xa:%{Xc:c}%{!Xc:%{Xk:k}%{!Xk:%{Xt:t}%{!Xt:a}}}},%{ansi:ansi}%{!ansi:%{posix:posix}%{!posix:%{Xpg4:xpg4}%{!Xpg4:%{Xpg4plus:XPG4PLUS}%{!Xpg4plus:%{Xods30:ods30}%{!Xods30:XPG4PLUS}}}}},ELF}}} \ 268 %{Wl,*:%*} %{YP,*} %{YL,*} %{YU,*} \ 269 %{!YP,*:%{p:-YP,/usr/ccs/libp:/lib/libp:/usr/lib/libp:/usr/ccs/lib:/lib:/usr/lib} \ 270 %{!p:-YP,/usr/ccs/lib:/lib:/usr/lib}} \ 271 %{h*} %{static:-dn -Bstatic %{G:%e-G and -static are mutually exclusive}} \ 272 %{shared:%{!G:-G}} %{G:%{!shared:-G}} %{shared:%{G:-G}} \ 273 %{shared:-dy %{symbolic:-Bsymbolic -G} %{z*}} %{R*} %{Y*} \ 274 %{Qn:} %{!Qy:-Qn} -z alt_resolve" 275 276/* Library spec. If we are not building a shared library, provide the 277 standard libraries, as per the SCO compiler. */ 278 279#undef LIB_SPEC 280#define LIB_SPEC \ 281 "%{shared:%{!G:pic/libgcc.a%s}} \ 282 %{G:%{!shared:pic/libgcc.a%s}} \ 283 %{shared:%{G:pic/libgcc.a%s}} \ 284 %{p:%{!pp:-lelfprof -lelf}} %{pp:%{!p:-lelfprof -lelf}} \ 285 %{!shared:%{!symbolic:%{!G:-lcrypt -lgen -lc %{pthread:-lpthread}}}}" 286 287#undef LIBGCC_SPEC 288#define LIBGCC_SPEC \ 289 "%{!shared:%{!G:-lgcc}}" 290 291/* Here for legacy support only so we still accept -melf flag */ 292#define MASK_COFF 010000000000 /* Mask for COFF generation */ 293#define TARGET_ELF (1) 294 295#undef SUBTARGET_SWITCHES 296#define SUBTARGET_SWITCHES \ 297 { "elf", -MASK_COFF, N_("Generate ELF output") }, 298 299/* Handle special EH pointer encodings. Absolute, pc-relative, and 300 indirect are handled automatically. */ 301#define ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX(FILE, ENCODING, SIZE, ADDR, DONE) \ 302 do { \ 303 if ((SIZE) == 4 && ((ENCODING) & 0x70) == DW_EH_PE_datarel) \ 304 { \ 305 fputs (ASM_LONG, FILE); \ 306 assemble_name (FILE, XSTR (ADDR, 0)); \ 307 fputs (((ENCODING) & DW_EH_PE_indirect ? "@GOT" : "@GOTOFF"), FILE); \ 308 goto DONE; \ 309 } \ 310 } while (0) 311 312/* Used by crtstuff.c to initialize the base of data-relative relocations. 313 These are GOT relative on x86, so return the pic register. */ 314#ifdef __PIC__ 315#define CRT_GET_RFIB_DATA(BASE) \ 316 { \ 317 register void *ebx_ __asm__("ebx"); \ 318 BASE = ebx_; \ 319 } 320#else 321#define CRT_GET_RFIB_DATA(BASE) \ 322 __asm__ ("call\t.LPR%=\n" \ 323 ".LPR%=:\n\t" \ 324 "popl\t%0\n\t" \ 325 /* Due to a GAS bug, this cannot use EAX. That encodes \ 326 smaller than the traditional EBX, which results in the \ 327 offset being off by one. */ \ 328 "addl\t$_GLOBAL_OFFSET_TABLE_+[.-.LPR%=],%0" \ 329 : "=d"(BASE)) 330#endif 331 332