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 /* This goes away when the math emulator is fixed. */
90 #undef TARGET_SUBTARGET_DEFAULT
91 #define TARGET_SUBTARGET_DEFAULT \
92 (MASK_80387 | MASK_IEEE_FP | MASK_FLOAT_RETURNS | MASK_NO_FANCY_MATH_387)
94 /* Don't default to pcc-struct-return, we want to retain compatibility with
95 older gcc versions AND pcc-struct-return is nonreentrant.
96 (even though the SVR4 ABI for the i386 says that records and unions are
97 returned in memory). */
99 #undef DEFAULT_PCC_STRUCT_RETURN
100 #define DEFAULT_PCC_STRUCT_RETURN 0
102 /* FreeBSD sets the rounding precision of the FPU to 53 bits. Let the
103 compiler get the contents of <float.h> and std::numeric_limits correct. */
104 #undef TARGET_96_ROUND_53_LONG_DOUBLE
105 #define TARGET_96_ROUND_53_LONG_DOUBLE (!TARGET_64BIT)
107 /* Tell final.c that we don't need a label passed to mcount. */
108 #define NO_PROFILE_COUNTERS 1
110 /* Output assembler code to FILE to begin profiling of the current function.
111 LABELNO is an optional label. */
114 #define MCOUNT_NAME ".mcount"
116 /* Output assembler code to FILE to end profiling of the current function. */
118 #undef FUNCTION_PROFILER_EPILOGUE /* BDE will need to fix this. */
121 /************************[ Assembler stuff ]********************************/
123 /* Override the default comment-starter of "/" from unix.h. */
124 #undef ASM_COMMENT_START
125 #define ASM_COMMENT_START "#"
127 /* Override the default comment-starter of "/APP" from unix.h. */
129 #define ASM_APP_ON "#APP\n"
131 #define ASM_APP_OFF "#NO_APP\n"
133 /* XXX:DEO do we still need this override to defaults.h ?? */
134 /* This is how to output a reference to a user-level label named NAME. */
135 #undef ASM_OUTPUT_LABELREF
136 #define ASM_OUTPUT_LABELREF(FILE, NAME) \
138 const char *xname = (NAME); \
139 /* Hack to avoid writing lots of rtl in \
140 FUNCTION_PROFILER_EPILOGUE (). */ \
141 if (*xname == '.' && strcmp(xname + 1, "mexitcount") == 0) \
144 fprintf ((FILE), "*%s@GOT(%%ebx)", xname); \
146 fprintf ((FILE), "%s", xname); \
150 if (xname[0] == '%') \
152 if (xname[0] == '*') \
155 fputs (user_label_prefix, FILE); \
156 fputs (xname, FILE); \
160 /* This is how to hack on the symbol code of certain relcalcitrant
161 symbols to modify their output in output_pic_addr_const (). */
163 #undef ASM_HACK_SYMBOLREF_CODE /* BDE will need to fix this. */
165 /* A C statement to output to the stdio stream FILE an assembler
166 command to advance the location counter to a multiple of 1<<LOG
167 bytes if it is within MAX_SKIP bytes.
169 This is used to align code labels according to Intel recommendations. */
171 /* XXX configuration of this is broken in the same way as HAVE_GAS_SHF_MERGE,
172 but it is easier to fix in an MD way. */
174 #ifdef HAVE_GAS_MAX_SKIP_P2ALIGN
175 #undef ASM_OUTPUT_MAX_SKIP_ALIGN
176 #define ASM_OUTPUT_MAX_SKIP_ALIGN(FILE, LOG, MAX_SKIP) \
179 if ((MAX_SKIP) == 0) \
180 fprintf ((FILE), "\t.p2align %d\n", (LOG)); \
182 fprintf ((FILE), "\t.p2align %d,,%d\n", (LOG), (MAX_SKIP)); \
187 /* If defined, a C expression whose value is a string containing the
188 assembler operation to identify the following data as
189 uninitialized global data. If not defined, and neither
190 `ASM_OUTPUT_BSS' nor `ASM_OUTPUT_ALIGNED_BSS' are defined,
191 uninitialized global data will be output in the data section if
192 `-fno-common' is passed, otherwise `ASM_OUTPUT_COMMON' will be
194 #undef BSS_SECTION_ASM_OP
195 #define BSS_SECTION_ASM_OP "\t.section\t.bss"
197 /* Like `ASM_OUTPUT_BSS' except takes the required alignment as a
198 separate, explicit argument. If you define this macro, it is used
199 in place of `ASM_OUTPUT_BSS', and gives you more flexibility in
200 handling the required alignment of the variable. The alignment is
201 specified as the number of bits.
203 Try to use function `asm_output_aligned_bss' defined in file
204 `varasm.c' when defining this macro. */
205 #undef ASM_OUTPUT_ALIGNED_BSS
206 #define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \
207 asm_output_aligned_bss (FILE, DECL, NAME, SIZE, ALIGN)
209 /************************[ Debugger stuff ]*********************************/
211 #undef DBX_REGISTER_NUMBER
212 #define DBX_REGISTER_NUMBER(n) (TARGET_64BIT ? dbx64_register_map[n] \
213 : (write_symbols == DWARF2_DEBUG) \
214 ? svr4_dbx_register_map[(n)] \
215 : dbx_register_map[(n)])
217 /* The same functions are used to creating the DWARF2 debug info and C++
218 unwind info (except.c). Regardless of the debug format requested, the
219 register numbers used in exception unwinding sections still have to be
220 DWARF compatible. IMO the GCC folks may be abusing the DBX_REGISTER_NUMBER
221 macro to mean too much. */
222 #define DWARF_FRAME_REGNUM(n) (TARGET_64BIT ? dbx64_register_map[n] \
223 : svr4_dbx_register_map[(n)])
225 /* stabs-in-elf has offsets relative to function beginning */
226 #undef DBX_OUTPUT_LBRAC
227 #define DBX_OUTPUT_LBRAC(FILE, NAME) \
229 fprintf (asm_out_file, "%s %d,0,0,", ASM_STABN_OP, N_LBRAC); \
230 assemble_name (asm_out_file, NAME); \
231 fputc ('-', asm_out_file); \
232 assemble_name (asm_out_file, \
233 XSTR (XEXP (DECL_RTL (current_function_decl), 0), 0)); \
234 fprintf (asm_out_file, "\n"); \
237 #undef DBX_OUTPUT_RBRAC
238 #define DBX_OUTPUT_RBRAC(FILE, NAME) \
240 fprintf (asm_out_file, "%s %d,0,0,", ASM_STABN_OP, N_RBRAC); \
241 assemble_name (asm_out_file, NAME); \
242 fputc ('-', asm_out_file); \
243 assemble_name (asm_out_file, \
244 XSTR (XEXP (DECL_RTL (current_function_decl), 0), 0)); \
245 fprintf (asm_out_file, "\n"); \