1 /* Definitions for MIPS running Linux-based GNU systems with ELF format.
2 Copyright (C) 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
4 This file is part of GNU CC.
6 GNU CC is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2, or (at your option)
11 GNU CC is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with GNU CC; see the file COPYING. If not, write to
18 the Free Software Foundation, 59 Temple Place - Suite 330,
19 Boston, MA 02111-1307, USA. */
21 #include "mips/mips.h"
22 #include "mips/abi64.h"
25 #define WCHAR_TYPE "int"
27 #undef WCHAR_TYPE_SIZE
28 #define WCHAR_TYPE_SIZE 32
30 /* If defined, a C expression whose value is a string containing the
31 assembler operation to identify the following data as
32 uninitialized global data. If not defined, and neither
33 `ASM_OUTPUT_BSS' nor `ASM_OUTPUT_ALIGNED_BSS' are defined,
34 uninitialized global data will be output in the data section if
35 `-fno-common' is passed, otherwise `ASM_OUTPUT_COMMON' will be
37 #define BSS_SECTION_ASM_OP "\t.section\t.bss"
39 #define SBSS_SECTION_ASM_OP "\t.section .sbss"
41 /* Like `ASM_OUTPUT_BSS' except takes the required alignment as a
42 separate, explicit argument. If you define this macro, it is used
43 in place of `ASM_OUTPUT_BSS', and gives you more flexibility in
44 handling the required alignment of the variable. The alignment is
45 specified as the number of bits.
47 Try to use function `asm_output_aligned_bss' defined in file
48 `varasm.c' when defining this macro. */
49 #define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \
51 ASM_GLOBALIZE_LABEL (FILE, NAME); \
52 if (SIZE > 0 && SIZE <= mips_section_threshold) \
56 ASM_OUTPUT_ALIGN (FILE, floor_log2 (ALIGN / BITS_PER_UNIT)); \
57 last_assemble_variable_decl = DECL; \
58 ASM_DECLARE_OBJECT_NAME (FILE, NAME, DECL); \
59 ASM_OUTPUT_SKIP (FILE, SIZE ? SIZE : 1); \
62 /* These macros generate the special .type and .size directives which
63 are used to set the corresponding fields of the linker symbol table
64 entries in an ELF object file under SVR4. These macros also output
65 the starting labels for the relevant functions/objects. */
67 /* Write the extra assembler code needed to declare an object properly. */
69 #undef ASM_DECLARE_OBJECT_NAME
70 #define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL) \
72 fprintf (FILE, "%s", TYPE_ASM_OP); \
73 assemble_name (FILE, NAME); \
75 fprintf (FILE, TYPE_OPERAND_FMT, "object"); \
77 size_directive_output = 0; \
78 if (!flag_inhibit_size_directive && DECL_SIZE (DECL)) \
80 size_directive_output = 1; \
81 fprintf (FILE, "%s", SIZE_ASM_OP); \
82 assemble_name (FILE, NAME); \
83 fprintf (FILE, ","); \
84 fprintf (FILE, HOST_WIDE_INT_PRINT_DEC, \
85 int_size_in_bytes (TREE_TYPE (DECL))); \
86 fprintf (FILE, "\n"); \
88 mips_declare_object (FILE, NAME, "", ":\n", 0); \
91 #define TARGET_ASM_UNIQUE_SECTION mips_unique_section
93 /* A list of other sections which the compiler might be "in" at any
96 #define EXTRA_SECTIONS in_sdata, in_sbss
98 #undef EXTRA_SECTION_FUNCTIONS
99 #define EXTRA_SECTION_FUNCTIONS \
100 SECTION_FUNCTION_TEMPLATE(sdata_section, in_sdata, SDATA_SECTION_ASM_OP) \
101 SECTION_FUNCTION_TEMPLATE(sbss_section, in_sbss, SBSS_SECTION_ASM_OP)
103 #define SECTION_FUNCTION_TEMPLATE(FN, ENUM, OP) \
106 if (in_section != ENUM) \
108 fprintf (asm_out_file, "%s\n", OP); \
113 #undef TARGET_VERSION
114 #if TARGET_ENDIAN_DEFAULT == 0
115 #define TARGET_VERSION fprintf (stderr, " (MIPSel GNU/Linux with ELF)");
117 #define TARGET_VERSION fprintf (stderr, " (MIPS GNU/Linux with ELF)");
120 #undef MD_EXEC_PREFIX
121 #undef MD_STARTFILE_PREFIX
123 /* Required to keep collect2.c happy */
124 #undef OBJECT_FORMAT_COFF
126 /* If we don't set MASK_ABICALLS, we can't default to PIC. */
127 #undef TARGET_DEFAULT
128 #define TARGET_DEFAULT (MASK_ABICALLS|MASK_GAS)
130 #define TARGET_OS_CPP_BUILTINS() \
132 builtin_define ("__gnu_linux__"); \
133 builtin_define ("__ELF__"); \
134 builtin_define ("__PIC__"); \
135 builtin_define ("__pic__"); \
136 builtin_define_std ("unix"); \
137 builtin_define_std ("linux"); \
138 builtin_assert ("system=linux"); \
139 /* The GNU C++ standard library requires this. */ \
140 if (c_language = clk_cplusplus) \
141 builtin_define ("_GNU_SOURCE"); \
143 if (mips_abi == ABI_N32) \
145 builtin_define ("_ABIN32=2"); \
146 builtin_define ("_MIPS_SIM=_ABIN32"); \
147 builtin_define ("_MIPS_SZLONG=32"); \
148 builtin_define ("_MIPS_SZPTR=32"); \
150 else if (mips_abi == ABI_64) \
152 builtin_define ("_ABI64=3"); \
153 builtin_define ("_MIPS_SIM=_ABI64"); \
154 builtin_define ("_MIPS_SZLONG=64"); \
155 builtin_define ("_MIPS_SZPTR=64"); \
159 builtin_define ("_MIPS_SIM=_MIPS_SIM_ABI32"); \
160 builtin_define ("_MIPS_SZLONG=32"); \
161 builtin_define ("_MIPS_SZPTR=32"); \
163 if (TARGET_FLOAT64) \
164 builtin_define ("_MIPS_FPSET=32"); \
166 builtin_define ("_MIPS_FPSET=16"); \
169 builtin_define ("_MIPS_SZINT=64"); \
171 builtin_define ("_MIPS_SZINT=32"); \
174 #undef SUBTARGET_CPP_SPEC
175 #define SUBTARGET_CPP_SPEC "\
176 %{fno-PIC:-U__PIC__ -U__pic__} %{fno-pic:-U__PIC__ -U__pic__} \
177 %{fPIC:-D__PIC__ -D__pic__} %{fpic:-D__PIC__ -D__pic__} \
178 %{pthread:-D_REENTRANT}"
181 /* -G is incompatible with -KPIC which is the default, so only allow objects
182 in the small data section if the user explicitly asks for it. */
183 #undef MIPS_DEFAULT_GVALUE
184 #define MIPS_DEFAULT_GVALUE 0
186 /* Borrowed from sparc/linux.h */
194 %{rdynamic:-export-dynamic} \
195 %{!dynamic-linker:-dynamic-linker /lib/ld.so.1}} \
199 #undef SUBTARGET_ASM_SPEC
200 #define SUBTARGET_ASM_SPEC "\
202 %{!fno-PIC:%{!fno-pic:-KPIC}} \
203 %{fno-PIC:-non_shared} %{fno-pic:-non_shared}"
205 #undef SUBTARGET_ASM_DEBUGGING_SPEC
206 #define SUBTARGET_ASM_DEBUGGING_SPEC "-g0"
208 /* The MIPS assembler has different syntax for .set. We set it to
209 .dummy to trap any errors. */
211 #define SET_ASM_OP "\t.dummy\t"
213 #undef ASM_OUTPUT_DEF
214 #define ASM_OUTPUT_DEF(FILE,LABEL1,LABEL2) \
216 fputc ( '\t', FILE); \
217 assemble_name (FILE, LABEL1); \
218 fputs ( " = ", FILE); \
219 assemble_name (FILE, LABEL2); \
220 fputc ( '\n', FILE); \
223 #undef ASM_DECLARE_FUNCTION_NAME
224 #define ASM_DECLARE_FUNCTION_NAME(STREAM, NAME, DECL) \
226 if (!flag_inhibit_size_directive) \
228 fputs ("\t.ent\t", STREAM); \
229 assemble_name (STREAM, NAME); \
230 putc ('\n', STREAM); \
232 fprintf (STREAM, "\t%s\t ", TYPE_ASM_OP); \
233 assemble_name (STREAM, NAME); \
234 putc (',', STREAM); \
235 fprintf (STREAM, TYPE_OPERAND_FMT, "function"); \
236 putc ('\n', STREAM); \
237 assemble_name (STREAM, NAME); \
238 fputs (":\n", STREAM); \
241 #undef ASM_DECLARE_FUNCTION_SIZE
242 #define ASM_DECLARE_FUNCTION_SIZE(STREAM, NAME, DECL) \
244 if (!flag_inhibit_size_directive) \
246 fputs ("\t.end\t", STREAM); \
247 assemble_name (STREAM, NAME); \
248 putc ('\n', STREAM); \
252 /* Tell function_prologue in mips.c that we have already output the .ent/.end
254 #define FUNCTION_NAME_ALREADY_DECLARED
256 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE, GLOBAL) \
258 ? ((GLOBAL) ? DW_EH_PE_indirect : 0) | DW_EH_PE_pcrel | DW_EH_PE_sdata4\
261 /* The glibc _mcount stub will save $v0 for us. Don't mess with saving
262 it, since ASM_OUTPUT_REG_PUSH/ASM_OUTPUT_REG_POP do not work in the
263 presence of $gp-relative calls. */
264 #undef ASM_OUTPUT_REG_PUSH
265 #undef ASM_OUTPUT_REG_POP
267 /* The current Linux binutils uses MIPS_STABS_ELF and doesn't support
269 #undef SDB_DEBUGGING_INFO