-/* Definitions of target machine for GNU compiler for Intel 80386
- running FreeBSD.
- Copyright (C) 1988, 1992, 1994, 1996, 1997, 1999, 2000 Free Software
- Foundation, Inc.
- Contributed by Poul-Henning Kamp <phk@login.dkuug.dk>
+/* Definitions for Intel 386 running FreeBSD with ELF format
+ Copyright (C) 1996-2014 Free Software Foundation, Inc.
+ Contributed by Eric Youngdale.
+ Modified for stabs-in-ELF by H.J. Lu.
+ Adapted from GNU/Linux version by John Polstra.
+ Continued development by David O'Brien <obrien@freebsd.org>
-This file is part of GNU CC.
+This file is part of GCC.
-GNU CC is free software; you can redistribute it and/or modify
+GCC is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2, or (at your option)
+the Free Software Foundation; either version 3, or (at your option)
any later version.
-GNU CC is distributed in the hope that it will be useful,
+GCC is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
-along with GNU CC; see the file COPYING. If not, write to
-the Free Software Foundation, 59 Temple Place - Suite 330,
-Boston, MA 02111-1307, USA. */
+along with GCC; see the file COPYING3. If not see
+<http://www.gnu.org/licenses/>. */
-/* This is tested by i386gas.h. */
-#define YES_UNDERSCORES
-
-/* Don't assume anything about the header files. */
-#define NO_IMPLICIT_EXTERN_C
-
-#include "i386/gstabs.h"
-
-/* This goes away when the math-emulator is fixed */
-#undef TARGET_DEFAULT
-#define TARGET_DEFAULT \
- (MASK_80387 | MASK_IEEE_FP | MASK_FLOAT_RETURNS | MASK_NO_FANCY_MATH_387)
-
-#undef CPP_PREDEFINES
-#define CPP_PREDEFINES "-Dunix -D__FreeBSD__\
- -Asystem(unix) -Asystem(bsd) -Asystem(FreeBSD)"
-
-/* Like the default, except no -lg. */
-#define LIB_SPEC "%{!shared:%{!pg:-lc}%{pg:-lc_p}}"
-
-#undef SIZE_TYPE
-#define SIZE_TYPE "unsigned int"
-
-#undef PTRDIFF_TYPE
-#define PTRDIFF_TYPE "int"
-
-#undef WCHAR_TYPE
-#define WCHAR_TYPE "int"
-
-#define WCHAR_UNSIGNED 0
-
-#undef WCHAR_TYPE_SIZE
-#define WCHAR_TYPE_SIZE BITS_PER_WORD
/* Override the default comment-starter of "/". */
-
-#undef ASM_COMMENT_START
+#undef ASM_COMMENT_START
#define ASM_COMMENT_START "#"
-#undef ASM_APP_ON
+#undef ASM_APP_ON
#define ASM_APP_ON "#APP\n"
-#undef ASM_APP_OFF
+#undef ASM_APP_OFF
#define ASM_APP_OFF "#NO_APP\n"
-/* FreeBSD using a.out does not support DWARF2 unwinding mechanisms. */
-#define DWARF2_UNWIND_INFO 0
-\f
-/* The following macros are stolen from i386v4.h */
-/* These have to be defined to get PIC code correct */
-
-/* This is how to output an element of a case-vector that is relative.
- This is only used for PIC code. See comments by the `casesi' insn in
- i386.md for an explanation of the expression this outputs. */
+#undef DBX_REGISTER_NUMBER
+#define DBX_REGISTER_NUMBER(n) \
+ (TARGET_64BIT ? dbx64_register_map[n] : svr4_dbx_register_map[n])
+
+#undef NO_PROFILE_COUNTERS
+#define NO_PROFILE_COUNTERS 1
+
+/* Tell final.c that we don't need a label passed to mcount. */
+
+#undef MCOUNT_NAME
+#define MCOUNT_NAME ".mcount"
+
+/* Make gcc agree with <machine/ansi.h>. */
+
+#undef SIZE_TYPE
+#define SIZE_TYPE (TARGET_64BIT ? "long unsigned int" : "unsigned int")
+
+#undef PTRDIFF_TYPE
+#define PTRDIFF_TYPE (TARGET_64BIT ? "long int" : "int")
+
+#undef WCHAR_TYPE_SIZE
+#define WCHAR_TYPE_SIZE (TARGET_64BIT ? 32 : BITS_PER_WORD)
+
+#undef SUBTARGET_EXTRA_SPECS /* i386.h bogusly defines it. */
+#define SUBTARGET_EXTRA_SPECS \
+ { "fbsd_dynamic_linker", FBSD_DYNAMIC_LINKER }
+
+/* Provide a STARTFILE_SPEC appropriate for FreeBSD. Here we add
+ the magical crtbegin.o file (see crtstuff.c) which provides part
+ of the support for getting C++ file-scope static object constructed
+ before entering `main'. */
+
+#undef STARTFILE_SPEC
+#define STARTFILE_SPEC \
+ "%{!shared: \
+ %{pg:gcrt1.o%s} %{!pg:%{p:gcrt1.o%s} \
+ %{!p:%{profile:gcrt1.o%s} \
+ %{!profile:crt1.o%s}}}} \
+ crti.o%s %{!shared:crtbegin.o%s} %{shared:crtbeginS.o%s}"
+
+/* Provide a ENDFILE_SPEC appropriate for FreeBSD. Here we tack on
+ the magical crtend.o file (see crtstuff.c) which provides part of
+ the support for getting C++ file-scope static object constructed
+ before entering `main', followed by a normal "finalizer" file,
+ `crtn.o'. */
+
+#undef ENDFILE_SPEC
+#define ENDFILE_SPEC \
+ "%{!shared:crtend.o%s} %{shared:crtendS.o%s} crtn.o%s"
+
+/* Provide a LINK_SPEC appropriate for FreeBSD. Here we provide support
+ for the special GCC options -static and -shared, which allow us to
+ link things in one of these three modes by applying the appropriate
+ combinations of options at link-time.
+
+ When the -shared link option is used a final link is not being
+ done. */
+
+#undef LINK_SPEC
+#define LINK_SPEC "\
+ %{p:%nconsider using '-pg' instead of '-p' with gprof(1)} \
+ %{v:-V} \
+ %{assert*} %{R*} %{rpath*} %{defsym*} \
+ %{shared:-Bshareable %{h*} %{soname*}} \
+ %{!shared: \
+ %{!static: \
+ %{rdynamic:-export-dynamic} \
+ -dynamic-linker %(fbsd_dynamic_linker) } \
+ %{static:-Bstatic}} \
+ %{symbolic:-Bsymbolic}"
+
+/* A C statement to output to the stdio stream FILE an assembler
+ command to advance the location counter to a multiple of 1<<LOG
+ bytes if it is within MAX_SKIP bytes.
+
+ This is used to align code labels according to Intel recommendations. */
+
+#ifdef HAVE_GAS_MAX_SKIP_P2ALIGN
+#undef ASM_OUTPUT_MAX_SKIP_ALIGN
+#define ASM_OUTPUT_MAX_SKIP_ALIGN(FILE, LOG, MAX_SKIP) \
+ if ((LOG) != 0) { \
+ if ((MAX_SKIP) == 0) fprintf ((FILE), "\t.p2align %d\n", (LOG)); \
+ else fprintf ((FILE), "\t.p2align %d,,%d\n", (LOG), (MAX_SKIP)); \
+ }
+#endif
-#undef ASM_OUTPUT_ADDR_DIFF_ELT
-#define ASM_OUTPUT_ADDR_DIFF_ELT(FILE, BODY, VALUE, REL) \
- fprintf (FILE, "\t.long _GLOBAL_OFFSET_TABLE_+[.-%s%d]\n", LPREFIX, VALUE)
+/* Don't default to pcc-struct-return, we want to retain compatibility with
+ older gcc versions AND pcc-struct-return is nonreentrant.
+ (even though the SVR4 ABI for the i386 says that records and unions are
+ returned in memory). */
-/* Indicate that jump tables go in the text section. This is
- necessary when compiling PIC code. */
+#undef DEFAULT_PCC_STRUCT_RETURN
+#define DEFAULT_PCC_STRUCT_RETURN 0
-#define JUMP_TABLES_IN_TEXT_SECTION 1
+/* FreeBSD sets the rounding precision of the FPU to 53 bits. Let the
+ compiler get the contents of <float.h> and std::numeric_limits correct. */
+#undef TARGET_96_ROUND_53_LONG_DOUBLE
+#define TARGET_96_ROUND_53_LONG_DOUBLE (!TARGET_64BIT)
-/* Don't default to pcc-struct-return, because in FreeBSD we prefer the
- superior nature of the older gcc way. */
-#define DEFAULT_PCC_STRUCT_RETURN 0
+/* Static stack checking is supported by means of probes. */
+#define STACK_CHECK_STATIC_BUILTIN 1
-/* Ensure we the configuration knows our system correctly so we can link with
- libraries compiled with the native cc. */
-#undef NO_DOLLAR_IN_LABEL
-\f
-/* i386 freebsd still uses old binutils that don't insert nops by default
- when the .align directive demands to insert extra space in the text
- segment. */
-#undef ASM_OUTPUT_ALIGN
-#define ASM_OUTPUT_ALIGN(FILE,LOG) \
- if ((LOG)!=0) fprintf ((FILE), "\t.align %d,0x90\n", (LOG))
-\f
-/* Profiling routines, partially copied from i386/osfrose.h. */
-
-/* Redefine this to use %eax instead of %edx. */
-#undef FUNCTION_PROFILER
-#define FUNCTION_PROFILER(FILE, LABELNO) \
-{ \
- if (flag_pic) \
- { \
- fprintf (FILE, "\tleal %sP%d@GOTOFF(%%ebx),%%eax\n", \
- LPREFIX, (LABELNO)); \
- fprintf (FILE, "\tcall *mcount@GOT(%%ebx)\n"); \
- } \
- else \
- { \
- fprintf (FILE, "\tmovl $%sP%d,%%eax\n", LPREFIX, (LABELNO)); \
- fprintf (FILE, "\tcall mcount\n"); \
- } \
-}
-
-/*
- * Some imports from svr4.h in support of shared libraries.
- * Currently, we need the DECLARE_OBJECT_SIZE stuff.
- */
-
-/* Define the strings used for the special svr4 .type and .size directives.
- These strings generally do not vary from one system running svr4 to
- another, but if a given system (e.g. m88k running svr) needs to use
- different pseudo-op names for these, they may be overridden in the
- file which includes this one. */
-
-#define TYPE_ASM_OP "\t.type\t"
-#define SIZE_ASM_OP "\t.size\t"
-
-/* The following macro defines the format used to output the second
- operand of the .type assembler directive. Different svr4 assemblers
- expect various different forms for this operand. The one given here
- is just a default. You may need to override it in your machine-
- specific tm.h file (depending upon the particulars of your assembler). */
-
-#define TYPE_OPERAND_FMT "@%s"
-
-/* Write the extra assembler code needed to declare a function's result.
- Most svr4 assemblers don't require any special declaration of the
- result value, but there are exceptions. */
-
-#ifndef ASM_DECLARE_RESULT
-#define ASM_DECLARE_RESULT(FILE, RESULT)
+/* Support for i386 has been removed from FreeBSD 6.0 onward. */
+#if FBSD_MAJOR >= 6
+#define SUBTARGET32_DEFAULT_CPU "i486"
#endif
-/* These macros generate the special .type and .size directives which
- are used to set the corresponding fields of the linker symbol table
- entries in an ELF object file under SVR4. These macros also output
- the starting labels for the relevant functions/objects. */
-
-/* Write the extra assembler code needed to declare a function properly.
- Some svr4 assemblers need to also have something extra said about the
- function's return value. We allow for that here. */
-
-#define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \
- do { \
- fprintf (FILE, "%s", TYPE_ASM_OP); \
- assemble_name (FILE, NAME); \
- putc (',', FILE); \
- fprintf (FILE, TYPE_OPERAND_FMT, "function"); \
- putc ('\n', FILE); \
- ASM_DECLARE_RESULT (FILE, DECL_RESULT (DECL)); \
- ASM_OUTPUT_LABEL(FILE, NAME); \
- } while (0)
-
-/* Write the extra assembler code needed to declare an object properly. */
-
-#define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL) \
- do { \
- fprintf (FILE, "%s", TYPE_ASM_OP); \
- assemble_name (FILE, NAME); \
- putc (',', FILE); \
- fprintf (FILE, TYPE_OPERAND_FMT, "object"); \
- putc ('\n', FILE); \
- size_directive_output = 0; \
- if (!flag_inhibit_size_directive && DECL_SIZE (DECL)) \
- { \
- size_directive_output = 1; \
- fprintf (FILE, "%s", SIZE_ASM_OP); \
- assemble_name (FILE, NAME); \
- fprintf (FILE, ",%d\n", int_size_in_bytes (TREE_TYPE (DECL))); \
- } \
- ASM_OUTPUT_LABEL(FILE, NAME); \
- } while (0)
-
-/* Output the size directive for a decl in rest_of_decl_compilation
- in the case where we did not do so before the initializer.
- Once we find the error_mark_node, we know that the value of
- size_directive_output was set
- by ASM_DECLARE_OBJECT_NAME when it was run for the same decl. */
-
-#define ASM_FINISH_DECLARE_OBJECT(FILE, DECL, TOP_LEVEL, AT_END) \
-do { \
- const char *name = XSTR (XEXP (DECL_RTL (DECL), 0), 0); \
- if (!flag_inhibit_size_directive && DECL_SIZE (DECL) \
- && ! AT_END && TOP_LEVEL \
- && DECL_INITIAL (DECL) == error_mark_node \
- && !size_directive_output) \
- { \
- fprintf (FILE, "%s", SIZE_ASM_OP); \
- assemble_name (FILE, name); \
- fprintf (FILE, ",%d\n", int_size_in_bytes (TREE_TYPE (DECL)));\
- } \
- } while (0)
-
-
-/* This is how to declare the size of a function. */
-
-#define ASM_DECLARE_FUNCTION_SIZE(FILE, FNAME, DECL) \
- do { \
- if (!flag_inhibit_size_directive) \
- { \
- char label[256]; \
- static int labelno; \
- labelno++; \
- ASM_GENERATE_INTERNAL_LABEL (label, "Lfe", labelno); \
- ASM_OUTPUT_INTERNAL_LABEL (FILE, "Lfe", labelno); \
- fprintf (FILE, "%s", SIZE_ASM_OP); \
- assemble_name (FILE, (FNAME)); \
- fprintf (FILE, ","); \
- assemble_name (FILE, label); \
- fprintf (FILE, "-"); \
- assemble_name (FILE, (FNAME)); \
- putc ('\n', FILE); \
- } \
- } while (0)
-
-#define ASM_SPEC " %| %{fpic:-k} %{fPIC:-k}"
-#define LINK_SPEC \
- "%{p:%e`-p' not supported; use `-pg' and gprof(1)} \
- %{shared:-Bshareable} \
- %{!shared:%{!nostdlib:%{!r:%{!e*:-e start}}} -dc -dp %{static:-Bstatic} \
- %{pg:-Bstatic} %{Z}} \
- %{assert*} %{R*}"
-
-#define STARTFILE_SPEC \
- "%{shared:c++rt0.o%s} \
- %{!shared:%{pg:gcrt0.o%s}%{!pg:%{static:scrt0.o%s}%{!static:crt0.o%s}}}"
-
-/* Define this so we can compile MS code for use with WINE. */
-#define HANDLE_PRAGMA_PACK_PUSH_POP
-
-/* This is the pseudo-op used to generate a 32-bit word of data with a
- specific value in some section. */
-
-#define INT_ASM_OP "\t.long\t"
+#define TARGET_ASM_FILE_END file_end_indicate_exec_stack
+
git://gcc.gnu.org / gcc.git / blobdiff