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 %{!static:--hash-style=both --enable-new-dtags} \
53 %{symbolic:-Bsymbolic}"
55 /* Reset our STARTFILE_SPEC which was properly set in config/freebsd.h
56 but trashed by config/<cpu>/<file.h>. */
59 #define STARTFILE_SPEC FBSD_STARTFILE_SPEC
61 /* Provide an ENDFILE_SPEC appropriate for FreeBSD/i386. */
64 #define ENDFILE_SPEC FBSD_ENDFILE_SPEC
67 /************************[ Target stuff ]***********************************/
69 /* Define the actual types of some ANSI-mandated types.
70 Needs to agree with <machine/ansi.h>. GCC defaults come from c-decl.c,
71 c-common.c, and config/<arch>/<arch>.h. */
74 #define SIZE_TYPE (TARGET_64BIT ? "long unsigned int" : "unsigned int")
77 #define PTRDIFF_TYPE (TARGET_64BIT ? "long int" : "int")
79 #undef WCHAR_TYPE_SIZE
80 #define WCHAR_TYPE_SIZE (TARGET_64BIT ? 32 : BITS_PER_WORD)
82 #undef SUBTARGET_EXTRA_SPECS /* i386.h bogusly defines it. */
83 #define SUBTARGET_EXTRA_SPECS \
84 { "fbsd_dynamic_linker", FBSD_DYNAMIC_LINKER }
86 #define TARGET_VERSION fprintf (stderr, " (i386 FreeBSD/ELF)");
90 /* Don't default to pcc-struct-return, we want to retain compatibility with
91 older gcc versions AND pcc-struct-return is nonreentrant.
92 (even though the SVR4 ABI for the i386 says that records and unions are
93 returned in memory). */
95 #undef DEFAULT_PCC_STRUCT_RETURN
96 #define DEFAULT_PCC_STRUCT_RETURN 0
98 /* FreeBSD sets the rounding precision of the FPU to 53 bits. Let the
99 compiler get the contents of <float.h> and std::numeric_limits correct. */
100 #undef TARGET_96_ROUND_53_LONG_DOUBLE
101 #define TARGET_96_ROUND_53_LONG_DOUBLE (!TARGET_64BIT)
103 /* Tell final.c that we don't need a label passed to mcount. */
104 #define NO_PROFILE_COUNTERS 1
106 /* Output assembler code to FILE to begin profiling of the current function.
107 LABELNO is an optional label. */
110 #define MCOUNT_NAME ".mcount"
112 /* Output assembler code to FILE to end profiling of the current function. */
114 #undef FUNCTION_PROFILER_EPILOGUE /* BDE will need to fix this. */
117 /************************[ Assembler stuff ]********************************/
119 /* Override the default comment-starter of "/" from unix.h. */
120 #undef ASM_COMMENT_START
121 #define ASM_COMMENT_START "#"
123 /* Override the default comment-starter of "/APP" from unix.h. */
125 #define ASM_APP_ON "#APP\n"
127 #define ASM_APP_OFF "#NO_APP\n"
129 /* XXX:DEO do we still need this override to defaults.h ?? */
130 /* This is how to output a reference to a user-level label named NAME. */
131 #undef ASM_OUTPUT_LABELREF
132 #define ASM_OUTPUT_LABELREF(FILE, NAME) \
134 const char *xname = (NAME); \
135 /* Hack to avoid writing lots of rtl in \
136 FUNCTION_PROFILER_EPILOGUE (). */ \
137 if (*xname == '.' && strcmp(xname + 1, "mexitcount") == 0) \
140 fprintf ((FILE), "*%s@GOT(%%ebx)", xname); \
142 fprintf ((FILE), "%s", xname); \
146 if (xname[0] == '%') \
148 if (xname[0] == '*') \
151 fputs (user_label_prefix, FILE); \
152 fputs (xname, FILE); \
156 /* This is how to hack on the symbol code of certain relcalcitrant
157 symbols to modify their output in output_pic_addr_const (). */
159 #undef ASM_HACK_SYMBOLREF_CODE /* BDE will need to fix this. */
161 /* A C statement to output to the stdio stream FILE an assembler
162 command to advance the location counter to a multiple of 1<<LOG
163 bytes if it is within MAX_SKIP bytes.
165 This is used to align code labels according to Intel recommendations. */
167 /* XXX configuration of this is broken in the same way as HAVE_GAS_SHF_MERGE,
168 but it is easier to fix in an MD way. */
170 #ifdef HAVE_GAS_MAX_SKIP_P2ALIGN
171 #undef ASM_OUTPUT_MAX_SKIP_ALIGN
172 #define ASM_OUTPUT_MAX_SKIP_ALIGN(FILE, LOG, MAX_SKIP) \
175 if ((MAX_SKIP) == 0) \
176 fprintf ((FILE), "\t.p2align %d\n", (LOG)); \
178 fprintf ((FILE), "\t.p2align %d,,%d\n", (LOG), (MAX_SKIP)); \
183 /* If defined, a C expression whose value is a string containing the
184 assembler operation to identify the following data as
185 uninitialized global data. If not defined, and neither
186 `ASM_OUTPUT_BSS' nor `ASM_OUTPUT_ALIGNED_BSS' are defined,
187 uninitialized global data will be output in the data section if
188 `-fno-common' is passed, otherwise `ASM_OUTPUT_COMMON' will be
190 #undef BSS_SECTION_ASM_OP
191 #define BSS_SECTION_ASM_OP "\t.section\t.bss"
193 /* Like `ASM_OUTPUT_BSS' except takes the required alignment as a
194 separate, explicit argument. If you define this macro, it is used
195 in place of `ASM_OUTPUT_BSS', and gives you more flexibility in
196 handling the required alignment of the variable. The alignment is
197 specified as the number of bits.
199 Try to use function `asm_output_aligned_bss' defined in file
200 `varasm.c' when defining this macro. */
201 #undef ASM_OUTPUT_ALIGNED_BSS
202 #define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \
203 asm_output_aligned_bss (FILE, DECL, NAME, SIZE, ALIGN)
205 /************************[ Debugger stuff ]*********************************/
207 #undef DBX_REGISTER_NUMBER
208 #define DBX_REGISTER_NUMBER(n) (TARGET_64BIT ? dbx64_register_map[n] \
209 : (write_symbols == DWARF2_DEBUG) \
210 ? svr4_dbx_register_map[(n)] \
211 : dbx_register_map[(n)])
213 /* The same functions are used to creating the DWARF2 debug info and C++
214 unwind info (except.c). Regardless of the debug format requested, the
215 register numbers used in exception unwinding sections still have to be
216 DWARF compatible. IMO the GCC folks may be abusing the DBX_REGISTER_NUMBER
217 macro to mean too much. */
218 #define DWARF_FRAME_REGNUM(n) (TARGET_64BIT ? dbx64_register_map[n] \
219 : svr4_dbx_register_map[(n)])
221 /* stabs-in-elf has offsets relative to function beginning */
222 #undef DBX_OUTPUT_LBRAC
223 #define DBX_OUTPUT_LBRAC(FILE, NAME) \
225 fprintf (asm_out_file, "%s %d,0,0,", ASM_STABN_OP, N_LBRAC); \
226 assemble_name (asm_out_file, NAME); \
227 fputc ('-', asm_out_file); \
228 assemble_name (asm_out_file, \
229 XSTR (XEXP (DECL_RTL (current_function_decl), 0), 0)); \
230 fprintf (asm_out_file, "\n"); \
233 #undef DBX_OUTPUT_RBRAC
234 #define DBX_OUTPUT_RBRAC(FILE, NAME) \
236 fprintf (asm_out_file, "%s %d,0,0,", ASM_STABN_OP, N_RBRAC); \
237 assemble_name (asm_out_file, NAME); \
238 fputc ('-', asm_out_file); \
239 assemble_name (asm_out_file, \
240 XSTR (XEXP (DECL_RTL (current_function_decl), 0), 0)); \
241 fprintf (asm_out_file, "\n"); \
244 #undef NEED_INDICATE_EXEC_STACK
245 #define NEED_INDICATE_EXEC_STACK 1