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jeremybenn |
/* Target definitions for GCC for Intel 80386 running Interix
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Parts Copyright (C) 1991, 1999, 2000, 2002, 2003, 2004, 2007, 2008, 2009,
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2010, 2011, 2012 Free Software Foundation, Inc.
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Parts:
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by Douglas B. Rupp (drupp@cs.washington.edu).
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by Ron Guilmette (rfg@netcom.com).
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by Donn Terry (donn@softway.com).
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by Mumit Khan (khan@xraylith.wisc.edu).
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3, or (at your option)
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any later version.
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GCC is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GCC; see the file COPYING3. If not see
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<http://www.gnu.org/licenses/>. */
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/* Note: Interix doesn't support user-written DLLs (use conventional
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shared libs (.so) instead). Thus a lot of the stuff that might apply
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about dllimport/dllexport and the like does not apply here. */
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#include <stdio.h>
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/* Names to predefine in the preprocessor for this target machine. */
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#define DBX_DEBUGGING_INFO 1
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#define SDB_DEBUGGING_INFO 1
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#define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
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/* Our strategy for finding global constructors is a bit different, although
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not a lot. */
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#define DO_GLOBAL_CTORS_BODY \
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do { \
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int i; \
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unsigned long nptrs; \
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func_ptr *p; \
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asm( \
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" .section .ctor_head, \"rw\"\n" \
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"1:\n" \
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" .text \n" \
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ASM_LOAD_ADDR(1b,%0) \
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: "=r" (p) : : "cc"); \
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for (nptrs = 0; p[nptrs] != 0; nptrs++); \
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for (i = nptrs-1; i >= 0; i--) \
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p[i] (); \
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} while (0)
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#define DO_GLOBAL_DTORS_BODY \
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do { \
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func_ptr *p; \
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asm( \
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" .section .dtor_head, \"rw\"\n" \
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"1:\n" \
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" .text \n" \
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ASM_LOAD_ADDR(1b,%0) \
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: "=r" (p) : : "cc"); \
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while (*p) \
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{ \
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p++; \
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(*(p-1)) (); \
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} \
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} while (0)
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/* We don't use the "usual" push-an-address solution. */
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#undef TARGET_ASM_CONSTRUCTOR
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#undef SUBTARGET_SWITCHES
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#define SUBTARGET_SWITCHES \
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{ "ms-bitfields", MASK_MS_BITFIELD_LAYOUT, N_("Use native (MS) bitfield layout") }, \
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{ "no-ms-bitfields", -MASK_MS_BITFIELD_LAYOUT, N_("Use gcc default bitfield layout") },
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#undef LIB_SPEC
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#define LIB_SPEC "\
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%{!shared:%{!dynamic:-lc -lpsxdll \
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}} \
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%{!G:%{!dynamic:-lc -lpsxdll \
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}} \
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%{dynamic:-lc -lpsxdll \
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} \
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%{v}"
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#undef LINK_SPEC
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#define LINK_SPEC "%{!shared:-stack 0x4000000,0x10000} \
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%{g} \
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%{dynamic:-Bdynamic} \
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%{static:-Bstatic} \
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%{shared:--shared -Bdynamic} \
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%{G:--shared -Bdynamic} \
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%{symbolic:--shared -Bsymbolic -Bdynamic} \
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%{rpath*:--rpath %*} \
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"
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#undef STARTFILE_SPEC
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#define STARTFILE_SPEC \
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"%{!shared:%{pg:gcrt0%O%s}%{!pg:%{p:mcrt0%O%s}%{!p:crt0%O%s}}} %{shared:crti%O%s}"
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#define TARGET_DECLSPEC 1
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/* cpp handles __STDC__ */
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#define TARGET_OS_CPP_BUILTINS() \
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do \
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{ \
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builtin_define ("__INTERIX"); \
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builtin_define ("_M_IX86=300"); \
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builtin_define ("_X86_=1"); \
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builtin_define ("__stdcall=__attribute__((__stdcall__))"); \
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builtin_define ("__cdecl=__attribute__((__cdecl__))"); \
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builtin_define ("__declspec(x)=__attribute__((x))"); \
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builtin_assert ("system=unix"); \
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builtin_assert ("system=interix"); \
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if (preprocessing_asm_p ()) \
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builtin_define_std ("LANGUAGE_ASSEMBLY"); \
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else \
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{ \
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builtin_define_std ("LANGUAGE_C"); \
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if (c_dialect_cxx ()) \
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builtin_define_std ("LANGUAGE_C_PLUS_PLUS"); \
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if (c_dialect_objc ()) \
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builtin_define_std ("LANGUAGE_OBJECTIVE_C"); \
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} \
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} \
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while (0)
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#undef CPP_SPEC
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#define CPP_SPEC "%{posix:-D_POSIX_SOURCE}"
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#define SIZE_TYPE "unsigned int"
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#define PTRDIFF_TYPE "int"
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#define WCHAR_TYPE "short unsigned int"
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#define WCHAR_TYPE_SIZE 16
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/* Turn off long double being 96 bits. */
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#undef LONG_DOUBLE_TYPE_SIZE
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#define LONG_DOUBLE_TYPE_SIZE 64
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#undef LIBGCC2_LONG_DOUBLE_TYPE_SIZE
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#define LIBGCC2_LONG_DOUBLE_TYPE_SIZE 64
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/* The following are needed for us to be able to use winnt.c, but are not
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otherwise meaningful to Interix. (The functions that use these are
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never called because we don't do DLLs.) */
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#define TARGET_NOP_FUN_DLLIMPORT 1
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#define drectve_section() /* nothing */
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#define EH_FRAME_IN_DATA_SECTION
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#define READONLY_DATA_SECTION_ASM_OP "\t.section\t.rdata,\"r\""
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/* Define this macro if references to a symbol must be treated
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differently depending on something about the variale or
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function named by the symbol (such as what section it is in). */
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#undef TARGET_ENCODE_SECTION_INFO
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#define TARGET_ENCODE_SECTION_INFO i386_pe_encode_section_info
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#undef TARGET_STRIP_NAME_ENCODING
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#define TARGET_STRIP_NAME_ENCODING i386_pe_strip_name_encoding_full
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/* Emit code to check the stack when allocating more that 4000
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bytes in one go. */
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#define CHECK_STACK_LIMIT 4000
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/* By default, target has a 80387, uses IEEE compatible arithmetic,
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and returns float values in the 387 and needs stack probes
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We also align doubles to 64-bits forMSVC default compatibility
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Ditto for bitfields. */
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#undef TARGET_SUBTARGET_DEFAULT
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#define TARGET_SUBTARGET_DEFAULT \
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(MASK_80387 | MASK_IEEE_FP | MASK_FLOAT_RETURNS | MASK_STACK_PROBE | \
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MASK_ALIGN_DOUBLE | MASK_MS_BITFIELD_LAYOUT)
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/* The MS compilers take alignment as a number of bytes, so we do as well */
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#undef ASM_OUTPUT_ALIGN
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#define ASM_OUTPUT_ALIGN(FILE,LOG) \
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if ((LOG)!=0) fprintf ((FILE), "\t.balign %d\n", 1<<(LOG))
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/* Define this macro if in some cases global symbols from one translation
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unit may not be bound to undefined symbols in another translation unit
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without user intervention. For instance, under Microsoft Windows
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symbols must be explicitly imported from shared libraries (DLLs). */
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/*
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* Old gcc(3.3) did not have 1 here
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*/
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#define MULTIPLE_SYMBOL_SPACES 1
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extern void i386_pe_unique_section PARAMS ((tree, int));
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#define TARGET_ASM_UNIQUE_SECTION i386_pe_unique_section
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/* Switch into a generic section. */
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#define TARGET_ASM_NAMED_SECTION default_pe_asm_named_section
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/* Select attributes for named sections. */
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#define TARGET_SECTION_TYPE_FLAGS i386_pe_section_type_flags
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/* Write the extra assembler code needed to declare a function
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properly. If we are generating SDB debugging information, this
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will happen automatically, so we only need to handle other cases. */
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#undef ASM_DECLARE_FUNCTION_NAME
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#define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \
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do \
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{ \
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if (write_symbols != SDB_DEBUG) \
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i386_pe_declare_function_type (FILE, NAME, TREE_PUBLIC (DECL)); \
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ASM_OUTPUT_LABEL (FILE, NAME); \
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} \
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while (0)
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/* Add an external function to the list of functions to be declared at
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the end of the file. */
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#define ASM_OUTPUT_EXTERNAL(FILE, DECL, NAME) \
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do \
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{ \
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if (TREE_CODE (DECL) == FUNCTION_DECL) \
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i386_pe_record_external_function (DECL, NAME); \
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} \
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while (0)
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/* Declare the type properly for any external libcall. */
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#define ASM_OUTPUT_EXTERNAL_LIBCALL(FILE, FUN) \
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i386_pe_declare_function_type (FILE, XSTR (FUN, 0), 1)
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/* This says out to put a global symbol in the BSS section. */
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#undef ASM_OUTPUT_ALIGNED_BSS
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#define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \
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asm_output_aligned_bss ((FILE), (DECL), (NAME), (SIZE), (ALIGN))
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/* Don't assume anything about the header files. */
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#define NO_IMPLICIT_EXTERN_C
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/* External function declarations. */
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extern void i386_pe_record_external_function (tree, const char *);
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extern void i386_pe_declare_function_type (FILE *, const char *, int);
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extern void i386_pe_record_exported_symbol (const char *, int);
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extern void i386_pe_asm_file_end (FILE *);
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/* For Win32 ABI compatibility */
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#undef DEFAULT_PCC_STRUCT_RETURN
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#define DEFAULT_PCC_STRUCT_RETURN 0
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| 250 |
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/* A bitfield declared as `int' forces `int' alignment for the struct. */
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#undef PCC_BITFIELD_TYPE_MATTERS
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#define PCC_BITFIELD_TYPE_MATTERS 1
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| 254 |
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/* Enable alias attribute support. */
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#ifndef SET_ASM_OP
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#define SET_ASM_OP "\t.set\t"
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#endif
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| 259 |
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/* Note that there appears to be two different ways to support const
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sections at the moment. You can either #define the symbol
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READONLY_DATA_SECTION (giving it some code which switches to the
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readonly data section) or else you can #define the symbols
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EXTRA_SECTIONS, EXTRA_SECTION_FUNCTIONS, SELECT_SECTION, and
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SELECT_RTX_SECTION. We do both here just to be on the safe side. */
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| 266 |
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#define USE_CONST_SECTION 1
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| 267 |
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| 268 |
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/* The linker will take care of this, and having them causes problems with
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ld -r (specifically -rU). */
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| 270 |
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#define CTOR_LISTS_DEFINED_EXTERNALLY 1
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| 272 |
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/* Output a definition (implements alias) */
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| 273 |
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#define ASM_OUTPUT_DEF(FILE,LABEL1,LABEL2) \
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| 274 |
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do \
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| 275 |
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{ \
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| 276 |
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fputs (SET_ASM_OP, (FILE)); \
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| 277 |
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assemble_name (FILE, LABEL1); \
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| 278 |
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fputc (',', (FILE)); \
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| 279 |
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assemble_name (FILE, LABEL2); \
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| 280 |
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fputc ('\n', (FILE)); \
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| 281 |
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} \
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| 282 |
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while (0)
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| 283 |
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| 284 |
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#define HOST_PTR_AS_INT unsigned long
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| 285 |
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| 286 |
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/* The following two flags are usually "off" for i386, because some non-gnu
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| 287 |
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tools (for the i386) don't handle them. However, we don't have that
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| 288 |
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problem, so.... */
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| 289 |
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| 290 |
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/* Forward references to tags are allowed. */
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| 291 |
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#define SDB_ALLOW_FORWARD_REFERENCES
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| 292 |
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/* Unknown tags are also allowed. */
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| 293 |
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#define SDB_ALLOW_UNKNOWN_REFERENCES
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| 294 |
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/* DWARF2 Unwinding doesn't work with exception handling yet. */
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| 295 |
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#define DWARF2_UNWIND_INFO 0
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| 296 |
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/* MSVC returns structs of up to 8 bytes via registers. */
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| 297 |
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| 298 |
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#undef SUBTARGET_RETURN_IN_MEMORY
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| 299 |
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#define SUBTARGET_RETURN_IN_MEMORY(TYPE, FNTYPE) \
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(TYPE_MODE (TYPE) == BLKmode || \
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| 301 |
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(AGGREGATE_TYPE_P (TYPE) && int_size_in_bytes(TYPE) > 8 ))
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| 303 |
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#define ASM_LOAD_ADDR(loc, reg) " leal " #loc "," #reg "\n"
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/* The integer half of this list needs to be constant. However, there's
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| 306 |
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a lot of disagreement about what the floating point adjustments should
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be. We pick one that works with gdb. (The underlying problem is
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| 308 |
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what to do about the segment registers. Since we have access to them
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| 309 |
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from /proc, we'll allow them to be accessed in gdb, even tho the
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| 310 |
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gcc compiler can't generate them. (There's some evidence that
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| 311 |
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MSVC does, but possibly only for certain special "canned" sequences.) */
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| 312 |
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| 313 |
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#undef DBX_REGISTER_NUMBER
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| 314 |
|
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#define DBX_REGISTER_NUMBER(n) \
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| 315 |
|
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(TARGET_64BIT ? dbx64_register_map[n] \
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| 316 |
|
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: (n) == 0 ? (int) 0 \
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| 317 |
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: (n) == 1 ? (int) 2 \
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| 318 |
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: (n) == 2 ? (int) 1 \
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: (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 \
|
| 325 |
|
|
: (int) (-1))
|
| 326 |
|
|
|
| 327 |
|
|
#define EH_FRAME_IN_DATA_SECTION
|
| 328 |
|
|
|
| 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
|
| 333 |
|
|
|
| 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))
|
| 342 |
|
|
|
| 343 |
|
|
#define drectve_section() /* nothing */
|
| 344 |
|
|
|
