1 /* Configuration file for ARM BPABI targets.
2 Copyright (C) 2004, 2005, 2007, 2008, 2009
3 Free Software Foundation, Inc.
4 Contributed by CodeSourcery, LLC
6 This file is part of GCC.
8 GCC is free software; you can redistribute it and/or modify it
9 under the terms of the GNU General Public License as published
10 by the Free Software Foundation; either version 3, or (at your
11 option) any later version.
13 GCC is distributed in the hope that it will be useful, but WITHOUT
14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
15 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
16 License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING3. If not see
20 <http://www.gnu.org/licenses/>. */
22 /* Use the AAPCS ABI by default. */
23 #define ARM_DEFAULT_ABI ARM_ABI_AAPCS
25 /* Assume that AAPCS ABIs should adhere to the full BPABI. */
26 #define TARGET_BPABI (TARGET_AAPCS_BASED)
28 /* BPABI targets use EABI frame unwinding tables. */
29 #define TARGET_UNWIND_INFO 1
31 /* Section 4.1 of the AAPCS requires the use of VFP format. */
32 #undef FPUTYPE_DEFAULT
33 #define FPUTYPE_DEFAULT FPUTYPE_VFP
35 /* TARGET_BIG_ENDIAN_DEFAULT is set in
36 config.gcc for big endian configurations. */
37 #if TARGET_BIG_ENDIAN_DEFAULT
38 #define TARGET_ENDIAN_DEFAULT MASK_BIG_END
40 #define TARGET_ENDIAN_DEFAULT 0
43 /* EABI targets should enable interworking by default. */
45 #define TARGET_DEFAULT (MASK_INTERWORK | TARGET_ENDIAN_DEFAULT)
47 /* The ARM BPABI functions return a boolean; they use no special
48 calling convention. */
49 #define FLOAT_LIB_COMPARE_RETURNS_BOOL(MODE, COMPARISON) TARGET_BPABI
51 /* The BPABI integer comparison routines return { -1, 0, 1 }. */
52 #define TARGET_LIB_INT_CMP_BIASED !TARGET_BPABI
54 #define TARGET_FIX_V4BX_SPEC " %{mcpu=arm8|mcpu=arm810|mcpu=strongarm*|march=armv4:--fix-v4bx}"
56 /* Tell the assembler to build BPABI binaries. */
57 #undef SUBTARGET_EXTRA_ASM_SPEC
58 #define SUBTARGET_EXTRA_ASM_SPEC "%{mabi=apcs-gnu|mabi=atpcs:-meabi=gnu;:-meabi=5}" TARGET_FIX_V4BX_SPEC
60 #ifndef SUBTARGET_EXTRA_LINK_SPEC
61 #define SUBTARGET_EXTRA_LINK_SPEC ""
64 /* The generic link spec in elf.h does not support shared libraries. */
65 #define BPABI_LINK_SPEC \
66 "%{mbig-endian:-EB} %{mlittle-endian:-EL} " \
67 "%{static:-Bstatic} %{shared:-shared} %{symbolic:-Bsymbolic} " \
68 "-X" SUBTARGET_EXTRA_LINK_SPEC TARGET_FIX_V4BX_SPEC
71 #define LINK_SPEC BPABI_LINK_SPEC
73 #if defined (__thumb__)
74 #define RENAME_LIBRARY_SET ".thumb_set"
76 #define RENAME_LIBRARY_SET ".set"
79 /* Make __aeabi_AEABI_NAME an alias for __GCC_NAME. */
80 #define RENAME_LIBRARY(GCC_NAME, AEABI_NAME) \
81 __asm__ (".globl\t__aeabi_" #AEABI_NAME "\n" \
82 RENAME_LIBRARY_SET "\t__aeabi_" #AEABI_NAME \
83 ", __" #GCC_NAME "\n");
85 /* Give some libgcc functions an additional __aeabi name. */
87 #define DECLARE_LIBRARY_RENAMES RENAME_LIBRARY (muldi3, lmul)
90 #define DECLARE_LIBRARY_RENAMES RENAME_LIBRARY (muldi3, lmul)
93 #define DECLARE_LIBRARY_RENAMES RENAME_LIBRARY (fixdfdi, d2lz) \
94 extern DWtype __fixdfdi (DFtype) __attribute__((pcs("aapcs"))); \
95 extern UDWtype __fixunsdfdi (DFtype) __asm__("__aeabi_d2ulz") __attribute__((pcs("aapcs")));
98 #define DECLARE_LIBRARY_RENAMES RENAME_LIBRARY (fixunsdfdi, d2ulz) \
99 extern UDWtype __fixunsdfdi (DFtype) __attribute__((pcs("aapcs")));
102 #define DECLARE_LIBRARY_RENAMES RENAME_LIBRARY (fixsfdi, f2lz) \
103 extern DWtype __fixsfdi (SFtype) __attribute__((pcs("aapcs"))); \
104 extern UDWtype __fixunssfdi (SFtype) __asm__("__aeabi_f2ulz") __attribute__((pcs("aapcs")));
107 #define DECLARE_LIBRARY_RENAMES RENAME_LIBRARY (fixunssfdi, f2ulz) \
108 extern UDWtype __fixunssfdi (SFtype) __attribute__((pcs("aapcs")));
111 #define DECLARE_LIBRARY_RENAMES RENAME_LIBRARY (floatdidf, l2d)
114 #define DECLARE_LIBRARY_RENAMES RENAME_LIBRARY (floatdisf, l2f)
117 /* These renames are needed on ARMv6M. Other targets get them from
118 assembly routines. */
120 #define DECLARE_LIBRARY_RENAMES RENAME_LIBRARY (fixunsdfsi, d2uiz)
123 #define DECLARE_LIBRARY_RENAMES RENAME_LIBRARY (fixunssfsi, f2uiz)
126 #define DECLARE_LIBRARY_RENAMES RENAME_LIBRARY (floatundidf, ul2d)
129 #define DECLARE_LIBRARY_RENAMES RENAME_LIBRARY (floatundisf, ul2f)
132 /* The BPABI requires that we always use an out-of-line implementation
133 of RTTI comparison, even if the target supports weak symbols,
134 because the same object file might be used on a target that does
135 not support merging symbols across DLL boundaries. This macro is
136 broken out separately so that it can be used within
137 TARGET_OS_CPP_BUILTINS in configuration files for systems based on
139 #define TARGET_BPABI_CPP_BUILTINS() \
142 builtin_define ("__GXX_TYPEINFO_EQUALITY_INLINE=0"); \
146 #undef TARGET_OS_CPP_BUILTINS
147 #define TARGET_OS_CPP_BUILTINS() \
148 TARGET_BPABI_CPP_BUILTINS()
150 /* The BPABI specifies the use of .{init,fini}_array. Therefore, we
151 do not want GCC to put anything into the .{init,fini} sections. */
152 #undef INIT_SECTION_ASM_OP
153 #undef FINI_SECTION_ASM_OP
154 #define INIT_ARRAY_SECTION_ASM_OP ARM_EABI_CTORS_SECTION_OP
155 #define FINI_ARRAY_SECTION_ASM_OP ARM_EABI_DTORS_SECTION_OP
157 /* The legacy _mcount implementation assumes r11 points to a
158 4-word APCS frame. This is generally not true for EABI targets,
159 particularly not in Thumb mode. We assume the mcount
160 implementation does not require a counter variable (No Counter).
161 Note that __gnu_mcount_nc will be entered with a misaligned stack.
162 This is OK because it uses a special calling convention anyway. */
164 #undef NO_PROFILE_COUNTERS
165 #define NO_PROFILE_COUNTERS 1
166 #undef ARM_FUNCTION_PROFILER
167 #define ARM_FUNCTION_PROFILER(STREAM, LABELNO) \
169 fprintf (STREAM, "\tpush\t{lr}\n"); \
170 fprintf (STREAM, "\tbl\t__gnu_mcount_nc\n"); \
173 #undef SUBTARGET_FRAME_POINTER_REQUIRED
174 #define SUBTARGET_FRAME_POINTER_REQUIRED 0
176 /* __gnu_mcount_nc restores the original LR value before returning. Ensure
177 that there is no unnecessary hook set up. */