1 /* Definitions for Intel 386 running FreeBSD with ELF format
2 Copyright (C) 1996, 2000, 2002, 2004 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 2, 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 COPYING. If not, write to
22 the Free Software Foundation, 51 Franklin Street, Fifth Floor,
23 Boston, MA 02110-1301, USA. */
28 #define CC1_SPEC "%(cc1_cpu) %{profile:-p}"
30 /* Provide a LINK_SPEC appropriate for FreeBSD. Here we provide support
31 for the special GCC options -static and -shared, which allow us to
32 link things in one of these three modes by applying the appropriate
33 combinations of options at link-time. We like to support here for
34 as many of the other GNU linker options as possible. But I don't
35 have the time to search for those flags. I am sure how to add
36 support for -soname shared_object_name. H.J.
38 When the -shared link option is used a final link is not being
43 %{p:%nconsider using `-pg' instead of `-p' with gprof(1) } \
45 %{assert*} %{R*} %{rpath*} %{defsym*} \
46 %{shared:-Bshareable %{h*} %{soname*}} \
49 %{rdynamic: -export-dynamic} \
50 %{!dynamic-linker:-dynamic-linker %(fbsd_dynamic_linker) }} \
52 %{symbolic:-Bsymbolic}"
54 /* Reset our STARTFILE_SPEC which was properly set in config/freebsd.h
55 but trashed by config/<cpu>/<file.h>. */
58 #define STARTFILE_SPEC FBSD_STARTFILE_SPEC
60 /* Provide an ENDFILE_SPEC appropriate for FreeBSD/i386. */
63 #define ENDFILE_SPEC FBSD_ENDFILE_SPEC
66 /************************[ Target stuff ]***********************************/
68 /* Define the actual types of some ANSI-mandated types.
69 Needs to agree with <machine/ansi.h>. GCC defaults come from c-decl.c,
70 c-common.c, and config/<arch>/<arch>.h. */
73 #define SIZE_TYPE (TARGET_64BIT ? "long unsigned int" : "unsigned int")
76 #define PTRDIFF_TYPE (TARGET_64BIT ? "long int" : "int")
78 #undef WCHAR_TYPE_SIZE
79 #define WCHAR_TYPE_SIZE (TARGET_64BIT ? 32 : BITS_PER_WORD)
81 #undef SUBTARGET_EXTRA_SPECS /* i386.h bogusly defines it. */
82 #define SUBTARGET_EXTRA_SPECS \
83 { "fbsd_dynamic_linker", FBSD_DYNAMIC_LINKER }
85 #define TARGET_VERSION fprintf (stderr, " (i386 FreeBSD/ELF)");
89 /* Don't default to pcc-struct-return, we want to retain compatibility with
90 older gcc versions AND pcc-struct-return is nonreentrant.
91 (even though the SVR4 ABI for the i386 says that records and unions are
92 returned in memory). */
94 #undef DEFAULT_PCC_STRUCT_RETURN
95 #define DEFAULT_PCC_STRUCT_RETURN 0
97 /* FreeBSD sets the rounding precision of the FPU to 53 bits. Let the
98 compiler get the contents of <float.h> and std::numeric_limits correct. */
99 #undef TARGET_96_ROUND_53_LONG_DOUBLE
100 #define TARGET_96_ROUND_53_LONG_DOUBLE (!TARGET_64BIT)
102 /* Tell final.c that we don't need a label passed to mcount. */
103 #define NO_PROFILE_COUNTERS 1
105 /* Output assembler code to FILE to begin profiling of the current function.
106 LABELNO is an optional label. */
109 #define MCOUNT_NAME ".mcount"
111 /* Output assembler code to FILE to end profiling of the current function. */
113 #undef FUNCTION_PROFILER_EPILOGUE /* BDE will need to fix this. */
116 /************************[ Assembler stuff ]********************************/
118 /* Override the default comment-starter of "/" from unix.h. */
119 #undef ASM_COMMENT_START
120 #define ASM_COMMENT_START "#"
122 /* Override the default comment-starter of "/APP" from unix.h. */
124 #define ASM_APP_ON "#APP\n"
126 #define ASM_APP_OFF "#NO_APP\n"
128 /* XXX:DEO do we still need this override to defaults.h ?? */
129 /* This is how to output a reference to a user-level label named NAME. */
130 #undef ASM_OUTPUT_LABELREF
131 #define ASM_OUTPUT_LABELREF(FILE, NAME) \
133 const char *xname = (NAME); \
134 /* Hack to avoid writing lots of rtl in \
135 FUNCTION_PROFILER_EPILOGUE (). */ \
136 if (*xname == '.' && strcmp(xname + 1, "mexitcount") == 0) \
139 fprintf ((FILE), "*%s@GOT(%%ebx)", xname); \
141 fprintf ((FILE), "%s", xname); \
145 if (xname[0] == '%') \
147 if (xname[0] == '*') \
150 fputs (user_label_prefix, FILE); \
151 fputs (xname, FILE); \
155 /* This is how to hack on the symbol code of certain relcalcitrant
156 symbols to modify their output in output_pic_addr_const (). */
158 #undef ASM_HACK_SYMBOLREF_CODE /* BDE will need to fix this. */
160 /* A C statement to output to the stdio stream FILE an assembler
161 command to advance the location counter to a multiple of 1<<LOG
162 bytes if it is within MAX_SKIP bytes.
164 This is used to align code labels according to Intel recommendations. */
166 /* XXX configuration of this is broken in the same way as HAVE_GAS_SHF_MERGE,
167 but it is easier to fix in an MD way. */
169 #ifdef HAVE_GAS_MAX_SKIP_P2ALIGN
170 #undef ASM_OUTPUT_MAX_SKIP_ALIGN
171 #define ASM_OUTPUT_MAX_SKIP_ALIGN(FILE, LOG, MAX_SKIP) \
174 if ((MAX_SKIP) == 0) \
175 fprintf ((FILE), "\t.p2align %d\n", (LOG)); \
177 fprintf ((FILE), "\t.p2align %d,,%d\n", (LOG), (MAX_SKIP)); \
182 /* If defined, a C expression whose value is a string containing the
183 assembler operation to identify the following data as
184 uninitialized global data. If not defined, and neither
185 `ASM_OUTPUT_BSS' nor `ASM_OUTPUT_ALIGNED_BSS' are defined,
186 uninitialized global data will be output in the data section if
187 `-fno-common' is passed, otherwise `ASM_OUTPUT_COMMON' will be
189 #undef BSS_SECTION_ASM_OP
190 #define BSS_SECTION_ASM_OP "\t.section\t.bss"
192 /* Like `ASM_OUTPUT_BSS' except takes the required alignment as a
193 separate, explicit argument. If you define this macro, it is used
194 in place of `ASM_OUTPUT_BSS', and gives you more flexibility in
195 handling the required alignment of the variable. The alignment is
196 specified as the number of bits.
198 Try to use function `asm_output_aligned_bss' defined in file
199 `varasm.c' when defining this macro. */
200 #undef ASM_OUTPUT_ALIGNED_BSS
201 #define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \
202 asm_output_aligned_bss (FILE, DECL, NAME, SIZE, ALIGN)
204 /************************[ Debugger stuff ]*********************************/
206 #undef DBX_REGISTER_NUMBER
207 #define DBX_REGISTER_NUMBER(n) (TARGET_64BIT ? dbx64_register_map[n] \
208 : (write_symbols == DWARF2_DEBUG) \
209 ? svr4_dbx_register_map[(n)] \
210 : dbx_register_map[(n)])
212 /* The same functions are used to creating the DWARF2 debug info and C++
213 unwind info (except.c). Regardless of the debug format requested, the
214 register numbers used in exception unwinding sections still have to be
215 DWARF compatible. IMO the GCC folks may be abusing the DBX_REGISTER_NUMBER
216 macro to mean too much. */
217 #define DWARF_FRAME_REGNUM(n) (TARGET_64BIT ? dbx64_register_map[n] \
218 : svr4_dbx_register_map[(n)])
220 /* stabs-in-elf has offsets relative to function beginning */
221 #undef DBX_OUTPUT_LBRAC
222 #define DBX_OUTPUT_LBRAC(FILE, NAME) \
224 fprintf (asm_out_file, "%s %d,0,0,", ASM_STABN_OP, N_LBRAC); \
225 assemble_name (asm_out_file, NAME); \
226 fputc ('-', asm_out_file); \
227 assemble_name (asm_out_file, \
228 XSTR (XEXP (DECL_RTL (current_function_decl), 0), 0)); \
229 fprintf (asm_out_file, "\n"); \
232 #undef DBX_OUTPUT_RBRAC
233 #define DBX_OUTPUT_RBRAC(FILE, NAME) \
235 fprintf (asm_out_file, "%s %d,0,0,", ASM_STABN_OP, N_RBRAC); \
236 assemble_name (asm_out_file, NAME); \
237 fputc ('-', asm_out_file); \
238 assemble_name (asm_out_file, \
239 XSTR (XEXP (DECL_RTL (current_function_decl), 0), 0)); \
240 fprintf (asm_out_file, "\n"); \