Mercurial > hg > CbC > CbC_gcc
annotate gcc/config/i386/linux.h @ 55:77e2b8dfacca gcc-4.4.5
update it from 4.4.3 to 4.5.0
author | ryoma <e075725@ie.u-ryukyu.ac.jp> |
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date | Fri, 12 Feb 2010 23:39:51 +0900 |
parents | 58ad6c70ea60 |
children | b7f97abdc517 |
rev | line source |
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0 | 1 /* Definitions for Intel 386 running Linux-based GNU systems with ELF format. |
2 Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2001, 2002, 2004, 2005, | |
55
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
19
diff
changeset
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3 2006, 2007, 2008, 2009 Free Software Foundation, Inc. |
0 | 4 Contributed by Eric Youngdale. |
5 Modified for stabs-in-ELF by H.J. Lu. | |
6 | |
7 This file is part of GCC. | |
8 | |
9 GCC is free software; you can redistribute it and/or modify | |
10 it under the terms of the GNU General Public License as published by | |
11 the Free Software Foundation; either version 3, or (at your option) | |
12 any later version. | |
13 | |
14 GCC is distributed in the hope that it will be useful, | |
15 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 GNU General Public License for more details. | |
18 | |
19 You should have received a copy of the GNU General Public License | |
20 along with GCC; see the file COPYING3. If not see | |
21 <http://www.gnu.org/licenses/>. */ | |
22 | |
23 /* Output at beginning of assembler file. */ | |
24 /* The .file command should always begin the output. */ | |
25 #define TARGET_ASM_FILE_START_FILE_DIRECTIVE true | |
26 | |
27 #define TARGET_VERSION fprintf (stderr, " (i386 Linux/ELF)"); | |
28 | |
29 /* The svr4 ABI for the i386 says that records and unions are returned | |
30 in memory. */ | |
31 #undef DEFAULT_PCC_STRUCT_RETURN | |
32 #define DEFAULT_PCC_STRUCT_RETURN 1 | |
33 | |
34 /* We arrange for the whole %gs segment to map the tls area. */ | |
35 #undef TARGET_TLS_DIRECT_SEG_REFS_DEFAULT | |
36 #define TARGET_TLS_DIRECT_SEG_REFS_DEFAULT MASK_TLS_DIRECT_SEG_REFS | |
37 | |
38 #undef ASM_COMMENT_START | |
39 #define ASM_COMMENT_START "#" | |
40 | |
41 #undef DBX_REGISTER_NUMBER | |
42 #define DBX_REGISTER_NUMBER(n) \ | |
43 (TARGET_64BIT ? dbx64_register_map[n] : svr4_dbx_register_map[n]) | |
44 | |
45 /* Output assembler code to FILE to call the profiler. | |
46 To the best of my knowledge, no Linux libc has required the label | |
47 argument to mcount. */ | |
48 | |
49 #define NO_PROFILE_COUNTERS 1 | |
50 | |
51 #undef MCOUNT_NAME | |
52 #define MCOUNT_NAME "mcount" | |
53 | |
54 /* The GLIBC version of mcount for the x86 assumes that there is a | |
55 frame, so we cannot allow profiling without a frame pointer. */ | |
56 | |
57 #undef SUBTARGET_FRAME_POINTER_REQUIRED | |
58 #define SUBTARGET_FRAME_POINTER_REQUIRED crtl->profile | |
59 | |
60 #undef SIZE_TYPE | |
61 #define SIZE_TYPE "unsigned int" | |
62 | |
63 #undef PTRDIFF_TYPE | |
64 #define PTRDIFF_TYPE "int" | |
65 | |
66 #undef WCHAR_TYPE | |
67 #define WCHAR_TYPE "long int" | |
68 | |
69 #undef WCHAR_TYPE_SIZE | |
70 #define WCHAR_TYPE_SIZE BITS_PER_WORD | |
71 | |
72 #define TARGET_OS_CPP_BUILTINS() \ | |
73 do \ | |
74 { \ | |
75 LINUX_TARGET_OS_CPP_BUILTINS(); \ | |
76 } \ | |
77 while (0) | |
78 | |
79 #undef CPP_SPEC | |
80 #define CPP_SPEC "%{posix:-D_POSIX_SOURCE} %{pthread:-D_REENTRANT}" | |
81 | |
82 #undef CC1_SPEC | |
83 #define CC1_SPEC "%(cc1_cpu) %{profile:-p}" | |
84 | |
85 /* Provide a LINK_SPEC appropriate for Linux. Here we provide support | |
86 for the special GCC options -static and -shared, which allow us to | |
87 link things in one of these three modes by applying the appropriate | |
88 combinations of options at link-time. We like to support here for | |
89 as many of the other GNU linker options as possible. But I don't | |
90 have the time to search for those flags. I am sure how to add | |
91 support for -soname shared_object_name. H.J. | |
92 | |
93 I took out %{v:%{!V:-V}}. It is too much :-(. They can use | |
94 -Wl,-V. | |
95 | |
96 When the -shared link option is used a final link is not being | |
97 done. */ | |
98 | |
99 /* If ELF is the default format, we should not use /lib/elf. */ | |
100 | |
101 /* These macros may be overridden in k*bsd-gnu.h and i386/k*bsd-gnu.h. */ | |
102 #define LINK_EMULATION "elf_i386" | |
103 #define GLIBC_DYNAMIC_LINKER "/lib/ld-linux.so.2" | |
104 | |
105 #undef ASM_SPEC | |
106 #define ASM_SPEC \ | |
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77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
19
diff
changeset
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107 "%{v:-V} %{Qy:} %{!Qn:-Qy} %{n} %{T} %{Ym,*} %{Yd,*} %{Wa,*:%*} --32 \ |
0 | 108 %{!mno-sse2avx:%{mavx:-msse2avx}} %{msse2avx:%{!mavx:-msse2avx}}" |
109 | |
110 #undef SUBTARGET_EXTRA_SPECS | |
111 #define SUBTARGET_EXTRA_SPECS \ | |
112 { "link_emulation", LINK_EMULATION },\ | |
113 { "dynamic_linker", LINUX_DYNAMIC_LINKER } | |
114 | |
115 #undef LINK_SPEC | |
116 #define LINK_SPEC "-m %(link_emulation) %{shared:-shared} \ | |
117 %{!shared: \ | |
118 %{!ibcs: \ | |
119 %{!static: \ | |
120 %{rdynamic:-export-dynamic} \ | |
121 %{!dynamic-linker:-dynamic-linker %(dynamic_linker)}} \ | |
122 %{static:-static}}}" | |
123 | |
124 /* Similar to standard Linux, but adding -ffast-math support. */ | |
125 #undef ENDFILE_SPEC | |
126 #define ENDFILE_SPEC \ | |
127 "%{ffast-math|funsafe-math-optimizations:crtfastmath.o%s} \ | |
128 %{mpc32:crtprec32.o%s} \ | |
129 %{mpc64:crtprec64.o%s} \ | |
130 %{mpc80:crtprec80.o%s} \ | |
131 %{shared|pie:crtendS.o%s;:crtend.o%s} crtn.o%s" | |
132 | |
133 /* A C statement (sans semicolon) to output to the stdio stream | |
134 FILE the assembler definition of uninitialized global DECL named | |
135 NAME whose size is SIZE bytes and alignment is ALIGN bytes. | |
136 Try to use asm_output_aligned_bss to implement this macro. */ | |
137 | |
138 #define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \ | |
139 asm_output_aligned_bss (FILE, DECL, NAME, SIZE, ALIGN) | |
140 | |
141 /* A C statement to output to the stdio stream FILE an assembler | |
142 command to advance the location counter to a multiple of 1<<LOG | |
143 bytes if it is within MAX_SKIP bytes. | |
144 | |
145 This is used to align code labels according to Intel recommendations. */ | |
146 | |
147 #ifdef HAVE_GAS_MAX_SKIP_P2ALIGN | |
148 #define ASM_OUTPUT_MAX_SKIP_ALIGN(FILE,LOG,MAX_SKIP) \ | |
149 do { \ | |
150 if ((LOG) != 0) { \ | |
151 if ((MAX_SKIP) == 0) fprintf ((FILE), "\t.p2align %d\n", (LOG)); \ | |
152 else { \ | |
153 fprintf ((FILE), "\t.p2align %d,,%d\n", (LOG), (MAX_SKIP)); \ | |
154 /* Make sure that we have at least 8 byte alignment if > 8 byte \ | |
155 alignment is preferred. */ \ | |
19
58ad6c70ea60
update gcc from 4.4.0 to 4.4.1.
kent@firefly.cr.ie.u-ryukyu.ac.jp
parents:
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changeset
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156 if ((LOG) > 3 \ |
58ad6c70ea60
update gcc from 4.4.0 to 4.4.1.
kent@firefly.cr.ie.u-ryukyu.ac.jp
parents:
0
diff
changeset
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157 && (1 << (LOG)) > ((MAX_SKIP) + 1) \ |
58ad6c70ea60
update gcc from 4.4.0 to 4.4.1.
kent@firefly.cr.ie.u-ryukyu.ac.jp
parents:
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diff
changeset
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158 && (MAX_SKIP) >= 7) \ |
55
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
19
diff
changeset
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159 fputs ("\t.p2align 3\n", (FILE)); \ |
0 | 160 } \ |
161 } \ | |
162 } while (0) | |
163 #endif | |
164 | |
165 /* Handle special EH pointer encodings. Absolute, pc-relative, and | |
166 indirect are handled automatically. */ | |
167 #define ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX(FILE, ENCODING, SIZE, ADDR, DONE) \ | |
168 do { \ | |
169 if ((SIZE) == 4 && ((ENCODING) & 0x70) == DW_EH_PE_datarel) \ | |
170 { \ | |
171 fputs (ASM_LONG, FILE); \ | |
172 assemble_name (FILE, XSTR (ADDR, 0)); \ | |
173 fputs (((ENCODING) & DW_EH_PE_indirect ? "@GOT" : "@GOTOFF"), FILE); \ | |
174 goto DONE; \ | |
175 } \ | |
176 } while (0) | |
177 | |
178 /* Used by crtstuff.c to initialize the base of data-relative relocations. | |
179 These are GOT relative on x86, so return the pic register. */ | |
180 #ifdef __PIC__ | |
181 #define CRT_GET_RFIB_DATA(BASE) \ | |
182 { \ | |
183 register void *ebx_ __asm__("ebx"); \ | |
184 BASE = ebx_; \ | |
185 } | |
186 #else | |
187 #define CRT_GET_RFIB_DATA(BASE) \ | |
188 __asm__ ("call\t.LPR%=\n" \ | |
189 ".LPR%=:\n\t" \ | |
190 "pop{l}\t%0\n\t" \ | |
191 /* Due to a GAS bug, this cannot use EAX. That encodes \ | |
192 smaller than the traditional EBX, which results in the \ | |
193 offset being off by one. */ \ | |
194 "add{l}\t{$_GLOBAL_OFFSET_TABLE_+[.-.LPR%=],%0" \ | |
195 "|%0,_GLOBAL_OFFSET_TABLE_+(.-.LPR%=)}" \ | |
196 : "=d"(BASE)) | |
197 #endif | |
198 | |
199 /* Put all *tf routines in libgcc. */ | |
200 #undef LIBGCC2_HAS_TF_MODE | |
201 #define LIBGCC2_HAS_TF_MODE 1 | |
202 #define LIBGCC2_TF_CEXT q | |
203 #define TF_SIZE 113 | |
204 | |
205 #undef NEED_INDICATE_EXEC_STACK | |
206 #define NEED_INDICATE_EXEC_STACK 1 | |
207 | |
208 #define MD_UNWIND_SUPPORT "config/i386/linux-unwind.h" | |
209 | |
55
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
19
diff
changeset
|
210 /* The stack pointer needs to be moved while checking the stack. */ |
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
19
diff
changeset
|
211 #define STACK_CHECK_MOVING_SP 1 |
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
19
diff
changeset
|
212 |
0 | 213 /* This macro may be overridden in i386/k*bsd-gnu.h. */ |
214 #define REG_NAME(reg) reg | |
215 | |
216 #ifdef TARGET_LIBC_PROVIDES_SSP | |
217 /* i386 glibc provides __stack_chk_guard in %gs:0x14. */ | |
218 #define TARGET_THREAD_SSP_OFFSET 0x14 | |
219 #endif |