1 /* Definitions for ARM running Linux-based GNU systems using ELF
2 Copyright (C) 1993-2014 Free Software Foundation, Inc.
3 Contributed by Philip Blundell <philb@gnu.org>
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify it
8 under the terms of the GNU General Public License as published
9 by the Free Software Foundation; either version 3, or (at your
10 option) any later version.
12 GCC is distributed in the hope that it will be useful, but WITHOUT
13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
14 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
15 License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING3. If not see
19 <http://www.gnu.org/licenses/>. */
21 /* elfos.h should have already been included. Now just override
22 any conflicting definitions and add any extras. */
24 /* Run-time Target Specification. */
25 #undef TARGET_DEFAULT_FLOAT_ABI
26 #define TARGET_DEFAULT_FLOAT_ABI ARM_FLOAT_ABI_HARD
28 /* TARGET_BIG_ENDIAN_DEFAULT is set in
29 config.gcc for big endian configurations. */
30 #if TARGET_BIG_ENDIAN_DEFAULT
31 #define TARGET_ENDIAN_DEFAULT MASK_BIG_END
32 #define TARGET_ENDIAN_OPTION "mbig-endian"
33 #define TARGET_LINKER_EMULATION "armelfb_linux"
35 #define TARGET_ENDIAN_DEFAULT 0
36 #define TARGET_ENDIAN_OPTION "mlittle-endian"
37 #define TARGET_LINKER_EMULATION "armelf_linux"
41 #define TARGET_DEFAULT (TARGET_ENDIAN_DEFAULT)
43 #define SUBTARGET_CPU_DEFAULT TARGET_CPU_arm6
45 #define SUBTARGET_EXTRA_LINK_SPEC " -m " TARGET_LINKER_EMULATION " -p"
47 /* We do not have any MULTILIB_OPTIONS specified, so there are no
49 #undef MULTILIB_DEFAULTS
51 /* Now we define the strings used to build the spec file. */
54 "%{pthread:-lpthread} \
56 %{!shared:%{profile:-lc_p}%{!profile:-lc}}"
58 #define LIBGCC_SPEC "%{mfloat-abi=soft*:-lfloat} -lgcc"
60 #define GLIBC_DYNAMIC_LINKER "/lib/ld-linux.so.2"
62 #define LINUX_TARGET_LINK_SPEC "%{h*} \
65 %{symbolic:-Bsymbolic} \
67 %{rdynamic:-export-dynamic} \
68 -dynamic-linker " GNU_USER_DYNAMIC_LINKER "} \
70 %{mbig-endian:-EB} %{mlittle-endian:-EL}" \
71 SUBTARGET_EXTRA_LINK_SPEC
74 #define LINK_SPEC LINUX_TARGET_LINK_SPEC
76 #define TARGET_OS_CPP_BUILTINS() \
79 GNU_USER_TARGET_OS_CPP_BUILTINS(); \
83 /* This is how we tell the assembler that two symbols have the same value. */
84 #define ASM_OUTPUT_DEF(FILE, NAME1, NAME2) \
87 assemble_name (FILE, NAME1); \
88 fputs (" = ", FILE); \
89 assemble_name (FILE, NAME2); \
94 #undef FPUTYPE_DEFAULT
95 #define FPUTYPE_DEFAULT "vfp"
97 /* Call the function profiler with a given profile label. */
98 #undef ARM_FUNCTION_PROFILER
99 #define ARM_FUNCTION_PROFILER(STREAM, LABELNO) \
101 fprintf (STREAM, "\tbl\tmcount%s\n", \
102 (TARGET_ARM && NEED_PLT_RELOC) ? "(PLT)" : ""); \
105 /* The GNU/Linux profiler clobbers the link register. Make sure the
106 prologue knows to save it. */
107 #define PROFILE_HOOK(X) \
108 emit_clobber (gen_rtx_REG (SImode, LR_REGNUM))
110 /* The GNU/Linux profiler needs a frame pointer. */
111 #define SUBTARGET_FRAME_POINTER_REQUIRED crtl->profile
113 /* Add .note.GNU-stack. */
114 #undef NEED_INDICATE_EXEC_STACK
115 #define NEED_INDICATE_EXEC_STACK 1