1 /* Definitions for MIPS running Linux-based GNU systems with ELF format.
2 Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004
3 Free Software Foundation, Inc.
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 GCC is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING. If not, write to
19 the Free Software Foundation, 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
23 #define WCHAR_TYPE "int"
25 #undef WCHAR_TYPE_SIZE
26 #define WCHAR_TYPE_SIZE 32
28 /* If defined, a C expression whose value is a string containing the
29 assembler operation to identify the following data as
30 uninitialized global data. If not defined, and neither
31 `ASM_OUTPUT_BSS' nor `ASM_OUTPUT_ALIGNED_BSS' are defined,
32 uninitialized global data will be output in the data section if
33 `-fno-common' is passed, otherwise `ASM_OUTPUT_COMMON' will be
35 #define BSS_SECTION_ASM_OP "\t.section\t.bss"
37 #define ASM_OUTPUT_ALIGNED_BSS mips_output_aligned_bss
39 #undef ASM_DECLARE_OBJECT_NAME
40 #define ASM_DECLARE_OBJECT_NAME mips_declare_object_name
43 #if TARGET_ENDIAN_DEFAULT == 0
44 #define TARGET_VERSION fprintf (stderr, " (MIPSel GNU/Linux with ELF)");
46 #define TARGET_VERSION fprintf (stderr, " (MIPS GNU/Linux with ELF)");
50 #undef MD_STARTFILE_PREFIX
52 /* If we don't set MASK_ABICALLS, we can't default to PIC. */
54 #define TARGET_DEFAULT MASK_ABICALLS
56 #define TARGET_OS_CPP_BUILTINS() \
58 LINUX_TARGET_OS_CPP_BUILTINS(); \
59 builtin_define ("__PIC__"); \
60 builtin_define ("__pic__"); \
61 builtin_assert ("machine=mips"); \
62 /* The GNU C++ standard library requires this. */ \
63 if (c_dialect_cxx ()) \
64 builtin_define ("_GNU_SOURCE"); \
66 if (mips_abi == ABI_N32) \
68 builtin_define ("_ABIN32=2"); \
69 builtin_define ("_MIPS_SIM=_ABIN32"); \
70 builtin_define ("_MIPS_SZLONG=32"); \
71 builtin_define ("_MIPS_SZPTR=32"); \
73 else if (mips_abi == ABI_64) \
75 builtin_define ("_ABI64=3"); \
76 builtin_define ("_MIPS_SIM=_ABI64"); \
77 builtin_define ("_MIPS_SZLONG=64"); \
78 builtin_define ("_MIPS_SZPTR=64"); \
82 builtin_define ("_ABIO32=1"); \
83 builtin_define ("_MIPS_SIM=_ABIO32"); \
84 builtin_define ("_MIPS_SZLONG=32"); \
85 builtin_define ("_MIPS_SZPTR=32"); \
88 builtin_define ("_MIPS_FPSET=32"); \
90 builtin_define ("_MIPS_FPSET=16"); \
93 builtin_define ("_MIPS_SZINT=64"); \
95 builtin_define ("_MIPS_SZINT=32"); \
98 #undef SUBTARGET_CPP_SPEC
99 #define SUBTARGET_CPP_SPEC "\
100 %{fno-PIC:-U__PIC__ -U__pic__} %{fno-pic:-U__PIC__ -U__pic__} \
101 %{fPIC|fPIE|fpic|fpie:-D__PIC__ -D__pic__} \
102 %{pthread:-D_REENTRANT}"
105 /* -G is incompatible with -KPIC which is the default, so only allow objects
106 in the small data section if the user explicitly asks for it. */
107 #undef MIPS_DEFAULT_GVALUE
108 #define MIPS_DEFAULT_GVALUE 0
110 /* Borrowed from sparc/linux.h */
118 %{rdynamic:-export-dynamic} \
119 %{!dynamic-linker:-dynamic-linker /lib/ld.so.1}} \
122 #undef SUBTARGET_ASM_SPEC
123 #define SUBTARGET_ASM_SPEC "\
125 %{!fno-PIC:%{!fno-pic:-KPIC}} \
126 %{fno-PIC:-non_shared} %{fno-pic:-non_shared}"
128 /* The MIPS assembler has different syntax for .set. We set it to
129 .dummy to trap any errors. */
131 #define SET_ASM_OP "\t.dummy\t"
133 #undef ASM_OUTPUT_DEF
134 #define ASM_OUTPUT_DEF(FILE,LABEL1,LABEL2) \
136 fputc ( '\t', FILE); \
137 assemble_name (FILE, LABEL1); \
138 fputs ( " = ", FILE); \
139 assemble_name (FILE, LABEL2); \
140 fputc ( '\n', FILE); \
143 #undef ASM_DECLARE_FUNCTION_NAME
144 #define ASM_DECLARE_FUNCTION_NAME(STREAM, NAME, DECL) \
146 if (!flag_inhibit_size_directive) \
148 fputs ("\t.ent\t", STREAM); \
149 assemble_name (STREAM, NAME); \
150 putc ('\n', STREAM); \
152 ASM_OUTPUT_TYPE_DIRECTIVE (STREAM, NAME, "function"); \
153 assemble_name (STREAM, NAME); \
154 fputs (":\n", STREAM); \
157 #undef ASM_DECLARE_FUNCTION_SIZE
158 #define ASM_DECLARE_FUNCTION_SIZE(STREAM, NAME, DECL) \
160 if (!flag_inhibit_size_directive) \
162 fputs ("\t.end\t", STREAM); \
163 assemble_name (STREAM, NAME); \
164 putc ('\n', STREAM); \
168 /* Tell function_prologue in mips.c that we have already output the .ent/.end
170 #undef FUNCTION_NAME_ALREADY_DECLARED
171 #define FUNCTION_NAME_ALREADY_DECLARED 1
173 /* The glibc _mcount stub will save $v0 for us. Don't mess with saving
174 it, since ASM_OUTPUT_REG_PUSH/ASM_OUTPUT_REG_POP do not work in the
175 presence of $gp-relative calls. */
176 #undef ASM_OUTPUT_REG_PUSH
177 #undef ASM_OUTPUT_REG_POP
182 %{!static:-rpath-link %R/lib:%R/usr/lib} \
183 %{!shared: %{pthread:-lpthread} \
184 %{profile:-lc_p} %{!profile: -lc}}"
187 /* Do code reading to identify a signal frame, and set the frame
188 state data appropriately. See unwind-dw2.c for the structs. */
192 /* The third parameter to the signal handler points to something with
193 * this structure defined in asm/ucontext.h, but the name clashes with
194 * struct ucontext from sys/ucontext.h so this private copy is used. */
195 typedef struct _sig_ucontext {
196 unsigned long uc_flags;
197 struct _sig_ucontext *uc_link;
199 struct sigcontext uc_mcontext;
203 #endif /* IN_LIBGCC2 */
205 #define MD_FALLBACK_FRAME_STATE_FOR(CONTEXT, FS, SUCCESS) \
207 u_int32_t *pc_ = (u_int32_t *) (CONTEXT)->ra; \
208 struct sigcontext *sc_; \
209 _Unwind_Ptr new_cfa_; \
212 /* 24021061 li v0, 0x1061 (rt_sigreturn)*/ \
213 /* 0000000c syscall */ \
215 /* 24021017 li v0, 0x1017 (sigreturn) */ \
216 /* 0000000c syscall */ \
217 if (*(pc_ + 1) != 0x0000000c) \
219 if (*(pc_ + 0) == 0x24021017) \
222 u_int32_t trampoline[2]; \
223 struct sigcontext sigctx; \
224 } *rt_ = (CONTEXT)->ra; \
225 sc_ = &rt_->sigctx; \
227 else if (*(pc_ + 0) == 0x24021061) \
229 struct rt_sigframe { \
230 u_int32_t trampoline[2]; \
231 struct siginfo info; \
232 _sig_ucontext_t uc; \
233 } *rt_ = (CONTEXT)->ra; \
234 sc_ = &rt_->uc.uc_mcontext; \
239 new_cfa_ = (_Unwind_Ptr)sc_; \
240 (FS)->cfa_how = CFA_REG_OFFSET; \
241 (FS)->cfa_reg = STACK_POINTER_REGNUM; \
242 (FS)->cfa_offset = new_cfa_ - (_Unwind_Ptr) (CONTEXT)->cfa; \
244 for (i_ = 0; i_ < 32; i_++) { \
245 (FS)->regs.reg[i_].how = REG_SAVED_OFFSET; \
246 (FS)->regs.reg[i_].loc.offset \
247 = (_Unwind_Ptr)&(sc_->sc_regs[i_]) - new_cfa_; \
249 (FS)->regs.reg[SIGNAL_UNWIND_RETURN_COLUMN].how = REG_SAVED_OFFSET; \
250 (FS)->regs.reg[SIGNAL_UNWIND_RETURN_COLUMN].loc.offset \
251 = (_Unwind_Ptr)&(sc_->sc_pc) - new_cfa_; \
252 (FS)->retaddr_column = SIGNAL_UNWIND_RETURN_COLUMN; \