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 "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 #define BE8_LINK_SPEC " %{mbig-endian:%{march=armv7-a|mcpu=cortex-a5|mcpu=cortex-a8|mcpu=cortex-a9:%{!r:--be8}}}"
58 /* Tell the assembler to build BPABI binaries. */
59 #undef SUBTARGET_EXTRA_ASM_SPEC
60 #define SUBTARGET_EXTRA_ASM_SPEC "%{mabi=apcs-gnu|mabi=atpcs:-meabi=gnu;:-meabi=5}" TARGET_FIX_V4BX_SPEC
62 #ifndef SUBTARGET_EXTRA_LINK_SPEC
63 #define SUBTARGET_EXTRA_LINK_SPEC ""
66 /* The generic link spec in elf.h does not support shared libraries. */
67 #define BPABI_LINK_SPEC \
68 "%{mbig-endian:-EB} %{mlittle-endian:-EL} " \
69 "%{static:-Bstatic} %{shared:-shared} %{symbolic:-Bsymbolic} " \
70 "-X" SUBTARGET_EXTRA_LINK_SPEC TARGET_FIX_V4BX_SPEC BE8_LINK_SPEC
73 #define LINK_SPEC BPABI_LINK_SPEC
75 #if defined (__thumb__)
76 #define RENAME_LIBRARY_SET ".thumb_set"
78 #define RENAME_LIBRARY_SET ".set"
81 /* Make __aeabi_AEABI_NAME an alias for __GCC_NAME. */
82 #define RENAME_LIBRARY(GCC_NAME, AEABI_NAME) \
83 __asm__ (".globl\t__aeabi_" #AEABI_NAME "\n" \
84 RENAME_LIBRARY_SET "\t__aeabi_" #AEABI_NAME \
85 ", __" #GCC_NAME "\n");
87 /* Give some libgcc functions an additional __aeabi name. */
89 #define DECLARE_LIBRARY_RENAMES RENAME_LIBRARY (muldi3, lmul)
92 #define DECLARE_LIBRARY_RENAMES RENAME_LIBRARY (muldi3, lmul)
95 #define DECLARE_LIBRARY_RENAMES RENAME_LIBRARY (fixdfdi, d2lz) \
96 extern DWtype __fixdfdi (DFtype) __attribute__((pcs("aapcs"))); \
97 extern UDWtype __fixunsdfdi (DFtype) __asm__("__aeabi_d2ulz") __attribute__((pcs("aapcs")));
100 #define DECLARE_LIBRARY_RENAMES RENAME_LIBRARY (fixunsdfdi, d2ulz) \
101 extern UDWtype __fixunsdfdi (DFtype) __attribute__((pcs("aapcs")));
104 #define DECLARE_LIBRARY_RENAMES RENAME_LIBRARY (fixsfdi, f2lz) \
105 extern DWtype __fixsfdi (SFtype) __attribute__((pcs("aapcs"))); \
106 extern UDWtype __fixunssfdi (SFtype) __asm__("__aeabi_f2ulz") __attribute__((pcs("aapcs")));
109 #define DECLARE_LIBRARY_RENAMES RENAME_LIBRARY (fixunssfdi, f2ulz) \
110 extern UDWtype __fixunssfdi (SFtype) __attribute__((pcs("aapcs")));
113 #define DECLARE_LIBRARY_RENAMES RENAME_LIBRARY (floatdidf, l2d)
116 #define DECLARE_LIBRARY_RENAMES RENAME_LIBRARY (floatdisf, l2f)
119 /* These renames are needed on ARMv6M. Other targets get them from
120 assembly routines. */
122 #define DECLARE_LIBRARY_RENAMES RENAME_LIBRARY (fixunsdfsi, d2uiz)
125 #define DECLARE_LIBRARY_RENAMES RENAME_LIBRARY (fixunssfsi, f2uiz)
128 #define DECLARE_LIBRARY_RENAMES RENAME_LIBRARY (floatundidf, ul2d)
131 #define DECLARE_LIBRARY_RENAMES RENAME_LIBRARY (floatundisf, ul2f)
134 /* The BPABI requires that we always use an out-of-line implementation
135 of RTTI comparison, even if the target supports weak symbols,
136 because the same object file might be used on a target that does
137 not support merging symbols across DLL boundaries. This macro is
138 broken out separately so that it can be used within
139 TARGET_OS_CPP_BUILTINS in configuration files for systems based on
141 #define TARGET_BPABI_CPP_BUILTINS() \
144 builtin_define ("__GXX_TYPEINFO_EQUALITY_INLINE=0"); \
148 #undef TARGET_OS_CPP_BUILTINS
149 #define TARGET_OS_CPP_BUILTINS() \
150 TARGET_BPABI_CPP_BUILTINS()
152 /* The BPABI specifies the use of .{init,fini}_array. Therefore, we
153 do not want GCC to put anything into the .{init,fini} sections. */
154 #undef INIT_SECTION_ASM_OP
155 #undef FINI_SECTION_ASM_OP
156 #define INIT_ARRAY_SECTION_ASM_OP ARM_EABI_CTORS_SECTION_OP
157 #define FINI_ARRAY_SECTION_ASM_OP ARM_EABI_DTORS_SECTION_OP
159 /* The legacy _mcount implementation assumes r11 points to a
160 4-word APCS frame. This is generally not true for EABI targets,
161 particularly not in Thumb mode. We assume the mcount
162 implementation does not require a counter variable (No Counter).
163 Note that __gnu_mcount_nc will be entered with a misaligned stack.
164 This is OK because it uses a special calling convention anyway. */
166 #undef NO_PROFILE_COUNTERS
167 #define NO_PROFILE_COUNTERS 1
168 #undef ARM_FUNCTION_PROFILER
169 #define ARM_FUNCTION_PROFILER(STREAM, LABELNO) \
171 fprintf (STREAM, "\tpush\t{lr}\n"); \
172 fprintf (STREAM, "\tbl\t__gnu_mcount_nc\n"); \
175 #undef SUBTARGET_FRAME_POINTER_REQUIRED
176 #define SUBTARGET_FRAME_POINTER_REQUIRED 0
178 /* __gnu_mcount_nc restores the original LR value before returning. Ensure
179 that there is no unnecessary hook set up. */