1 /* Definitions for Intel 386 running FreeBSD with ELF format
2 Copyright (C) 1996, 2000, 2002, 2004, 2007, 2010, 2011
3 Free Software Foundation, Inc.
4 Contributed by Eric Youngdale.
5 Modified for stabs-in-ELF by H.J. Lu.
6 Adapted from GNU/Linux version by John Polstra.
7 Continued development by David O'Brien <obrien@freebsd.org>
9 This file is part of GCC.
11 GCC is free software; you can redistribute it and/or modify
12 it under the terms of the GNU General Public License as published by
13 the Free Software Foundation; either version 3, or (at your option)
16 GCC is distributed in the hope that it will be useful,
17 but WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 GNU General Public License for more details.
21 You should have received a copy of the GNU General Public License
22 along with GCC; see the file COPYING3. If not see
23 <http://www.gnu.org/licenses/>. */
26 /* Override the default comment-starter of "/". */
27 #undef ASM_COMMENT_START
28 #define ASM_COMMENT_START "#"
31 #define ASM_APP_ON "#APP\n"
34 #define ASM_APP_OFF "#NO_APP\n"
36 #undef DBX_REGISTER_NUMBER
37 #define DBX_REGISTER_NUMBER(n) \
38 (TARGET_64BIT ? dbx64_register_map[n] : svr4_dbx_register_map[n])
40 #undef NO_PROFILE_COUNTERS
41 #define NO_PROFILE_COUNTERS 1
43 /* Tell final.c that we don't need a label passed to mcount. */
46 #define MCOUNT_NAME ".mcount"
48 /* Make gcc agree with <machine/ansi.h>. */
51 #define SIZE_TYPE (TARGET_64BIT ? "long unsigned int" : "unsigned int")
54 #define PTRDIFF_TYPE (TARGET_64BIT ? "long int" : "int")
56 #undef WCHAR_TYPE_SIZE
57 #define WCHAR_TYPE_SIZE (TARGET_64BIT ? 32 : BITS_PER_WORD)
59 #undef SUBTARGET_EXTRA_SPECS /* i386.h bogusly defines it. */
60 #define SUBTARGET_EXTRA_SPECS \
61 { "fbsd_dynamic_linker", FBSD_DYNAMIC_LINKER }
63 /* Provide a STARTFILE_SPEC appropriate for FreeBSD. Here we add
64 the magical crtbegin.o file (see crtstuff.c) which provides part
65 of the support for getting C++ file-scope static object constructed
66 before entering `main'. */
69 #define STARTFILE_SPEC \
71 %{pg:gcrt1.o%s} %{!pg:%{p:gcrt1.o%s} \
72 %{!p:%{profile:gcrt1.o%s} \
73 %{!profile:crt1.o%s}}}} \
74 crti.o%s %{!shared:crtbegin.o%s} %{shared:crtbeginS.o%s}"
76 /* Provide a ENDFILE_SPEC appropriate for FreeBSD. Here we tack on
77 the magical crtend.o file (see crtstuff.c) which provides part of
78 the support for getting C++ file-scope static object constructed
79 before entering `main', followed by a normal "finalizer" file,
83 #define ENDFILE_SPEC \
84 "%{!shared:crtend.o%s} %{shared:crtendS.o%s} crtn.o%s"
86 /* Provide a LINK_SPEC appropriate for FreeBSD. Here we provide support
87 for the special GCC options -static and -shared, which allow us to
88 link things in one of these three modes by applying the appropriate
89 combinations of options at link-time.
91 When the -shared link option is used a final link is not being
96 %{p:%nconsider using '-pg' instead of '-p' with gprof(1)} \
98 %{assert*} %{R*} %{rpath*} %{defsym*} \
99 %{shared:-Bshareable %{h*} %{soname*}} \
102 %{rdynamic:-export-dynamic} \
103 -dynamic-linker %(fbsd_dynamic_linker) } \
104 %{static:-Bstatic}} \
105 %{symbolic:-Bsymbolic}"
107 /* A C statement to output to the stdio stream FILE an assembler
108 command to advance the location counter to a multiple of 1<<LOG
109 bytes if it is within MAX_SKIP bytes.
111 This is used to align code labels according to Intel recommendations. */
113 #ifdef HAVE_GAS_MAX_SKIP_P2ALIGN
114 #undef ASM_OUTPUT_MAX_SKIP_ALIGN
115 #define ASM_OUTPUT_MAX_SKIP_ALIGN(FILE, LOG, MAX_SKIP) \
117 if ((MAX_SKIP) == 0) fprintf ((FILE), "\t.p2align %d\n", (LOG)); \
118 else fprintf ((FILE), "\t.p2align %d,,%d\n", (LOG), (MAX_SKIP)); \
122 /* Don't default to pcc-struct-return, we want to retain compatibility with
123 older gcc versions AND pcc-struct-return is nonreentrant.
124 (even though the SVR4 ABI for the i386 says that records and unions are
125 returned in memory). */
127 #undef DEFAULT_PCC_STRUCT_RETURN
128 #define DEFAULT_PCC_STRUCT_RETURN 0
130 /* FreeBSD sets the rounding precision of the FPU to 53 bits. Let the
131 compiler get the contents of <float.h> and std::numeric_limits correct. */
132 #undef TARGET_96_ROUND_53_LONG_DOUBLE
133 #define TARGET_96_ROUND_53_LONG_DOUBLE (!TARGET_64BIT)
135 /* Put all *tf routines in libgcc. */
136 #undef LIBGCC2_HAS_TF_MODE
137 #define LIBGCC2_HAS_TF_MODE 1
138 #define LIBGCC2_TF_CEXT q
141 /* Static stack checking is supported by means of probes. */
142 #define STACK_CHECK_STATIC_BUILTIN 1
144 /* Support for i386 has been removed from FreeBSD 6.0 onward. */
146 #define SUBTARGET32_DEFAULT_CPU "i486"
149 #define TARGET_ASM_FILE_END file_end_indicate_exec_stack