1 /* Definitions for Intel 386 running FreeBSD with ELF format
2 Copyright (C) 1996-2020 Free Software Foundation, Inc.
3 Contributed by Eric Youngdale.
4 Modified for stabs-in-ELF by H.J. Lu.
5 Adapted from GNU/Linux version by John Polstra.
6 Continued development by David O'Brien <obrien@freebsd.org>
8 This file is part of GCC.
10 GCC is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 3, or (at your option)
15 GCC is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
20 You should have received a copy of the GNU General Public License
21 along with GCC; see the file COPYING3. If not see
22 <http://www.gnu.org/licenses/>. */
25 /* Override the default comment-starter of "/". */
26 #undef ASM_COMMENT_START
27 #define ASM_COMMENT_START "#"
30 #define ASM_APP_ON "#APP\n"
33 #define ASM_APP_OFF "#NO_APP\n"
35 #undef DBX_REGISTER_NUMBER
36 #define DBX_REGISTER_NUMBER(n) \
37 (TARGET_64BIT ? dbx64_register_map[n] : svr4_dbx_register_map[n])
39 #undef NO_PROFILE_COUNTERS
40 #define NO_PROFILE_COUNTERS 1
42 /* Tell final.c that we don't need a label passed to mcount. */
45 #define MCOUNT_NAME ".mcount"
47 /* Make gcc agree with <machine/ansi.h>. */
50 #define SIZE_TYPE (TARGET_64BIT ? "long unsigned int" : "unsigned int")
53 #define PTRDIFF_TYPE (TARGET_64BIT ? "long int" : "int")
55 #undef WCHAR_TYPE_SIZE
56 #define WCHAR_TYPE_SIZE (TARGET_64BIT ? 32 : BITS_PER_WORD)
58 #undef SUBTARGET_EXTRA_SPECS /* i386.h bogusly defines it. */
59 #define SUBTARGET_EXTRA_SPECS \
60 { "fbsd_dynamic_linker", FBSD_DYNAMIC_LINKER }
62 /* Use the STARTFILE_SPEC from config/freebsd-spec.h. */
65 #define STARTFILE_SPEC FBSD_STARTFILE_SPEC
67 /* Use the ENDFILE_SPEC from config/freebsd-spec.h. */
70 #define ENDFILE_SPEC FBSD_ENDFILE_SPEC
72 /* Provide a LINK_SPEC appropriate for FreeBSD. Here we provide support
73 for the special GCC options -static and -shared, which allow us to
74 link things in one of these three modes by applying the appropriate
75 combinations of options at link-time.
77 When the -shared link option is used a final link is not being
82 %{p:%nconsider using '-pg' instead of '-p' with gprof(1)} \
84 %{assert*} %{R*} %{rpath*} %{defsym*} \
85 %{shared:-Bshareable %{h*} %{soname*}} \
88 %{rdynamic:-export-dynamic} \
89 -dynamic-linker %(fbsd_dynamic_linker) } \
91 %{symbolic:-Bsymbolic}"
93 /* A C statement to output to the stdio stream FILE an assembler
94 command to advance the location counter to a multiple of 1<<LOG
95 bytes if it is within MAX_SKIP bytes. */
97 #define SUBALIGN_LOG 3
99 #ifdef HAVE_GAS_MAX_SKIP_P2ALIGN
100 #undef ASM_OUTPUT_MAX_SKIP_ALIGN
101 #define ASM_OUTPUT_MAX_SKIP_ALIGN(FILE,LOG,MAX_SKIP) \
104 if ((MAX_SKIP) == 0 || (MAX_SKIP) >= (1 << (LOG)) - 1) \
105 fprintf ((FILE), "\t.p2align %d\n", (LOG)); \
107 fprintf ((FILE), "\t.p2align %d,,%d\n", (LOG), (MAX_SKIP)); \
112 /* Don't default to pcc-struct-return, we want to retain compatibility with
113 older gcc versions AND pcc-struct-return is nonreentrant.
114 (even though the SVR4 ABI for the i386 says that records and unions are
115 returned in memory). */
117 #undef DEFAULT_PCC_STRUCT_RETURN
118 #define DEFAULT_PCC_STRUCT_RETURN 0
120 /* FreeBSD sets the rounding precision of the FPU to 53 bits. Let the
121 compiler get the contents of <float.h> and std::numeric_limits correct. */
122 #undef TARGET_96_ROUND_53_LONG_DOUBLE
123 #define TARGET_96_ROUND_53_LONG_DOUBLE (!TARGET_64BIT)
125 /* Static stack checking is supported by means of probes. */
126 #define STACK_CHECK_STATIC_BUILTIN 1
128 #define SUBTARGET32_DEFAULT_CPU "i586"
130 #define TARGET_ASM_FILE_END file_end_indicate_exec_stack
132 /* Define the shadow offsets for asan. */
133 #undef SUBTARGET_SHADOW_OFFSET
134 #define SUBTARGET_SHADOW_OFFSET \
135 (TARGET_LP64 ? HOST_WIDE_INT_1 << 46 : HOST_WIDE_INT_1 << 30)