1 /* Configuration file for ARM GNU/Linux EABI targets.
2 Copyright (C) 2004-2023 Free Software Foundation, Inc.
3 Contributed by CodeSourcery, LLC
4
5 This file is part of GCC.
6
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.
11
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.
16
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/>. */
20
21 /* On EABI GNU/Linux, we want both the BPABI builtins and the
22 GNU/Linux builtins. */
23 #undef TARGET_OS_CPP_BUILTINS
24 #define TARGET_OS_CPP_BUILTINS() \
25 do \
26 { \
27 TARGET_BPABI_CPP_BUILTINS(); \
28 GNU_USER_TARGET_OS_CPP_BUILTINS(); \
29 ANDROID_TARGET_OS_CPP_BUILTINS(); \
30 } \
31 while (false)
32
33 /* We default to a soft-float ABI so that binaries can run on all
34 target hardware. If you override this to use the hard-float ABI then
35 change the setting of GLIBC_DYNAMIC_LINKER_DEFAULT as well. */
36 #undef TARGET_DEFAULT_FLOAT_ABI
37 #define TARGET_DEFAULT_FLOAT_ABI ARM_FLOAT_ABI_SOFT
38
39 /* We default to the "aapcs-linux" ABI so that enums are int-sized by
40 default. */
41 #undef ARM_DEFAULT_ABI
42 #define ARM_DEFAULT_ABI ARM_ABI_AAPCS_LINUX
43
44 /* TARGET_BIG_ENDIAN_DEFAULT is set in
45 config.gcc for big endian configurations. */
46 #undef TARGET_LINKER_EMULATION
47 #if TARGET_BIG_ENDIAN_DEFAULT
48 #define TARGET_LINKER_EMULATION "armelfb_linux_eabi"
49 #else
50 #define TARGET_LINKER_EMULATION "armelf_linux_eabi"
51 #endif
52
53 #undef SUBTARGET_EXTRA_LINK_SPEC
54 #define SUBTARGET_EXTRA_LINK_SPEC " -m " TARGET_LINKER_EMULATION
55
56 /* GNU/Linux on ARM currently supports three dynamic linkers:
57 - ld-linux.so.2 - for the legacy ABI
58 - ld-linux.so.3 - for the EABI-derived soft-float ABI
59 - ld-linux-armhf.so.3 - for the EABI-derived hard-float ABI.
60 All the dynamic linkers live in /lib.
61 We default to soft-float, but this can be overridden by changing both
62 GLIBC_DYNAMIC_LINKER_DEFAULT and TARGET_DEFAULT_FLOAT_ABI. */
63
64 #undef GLIBC_DYNAMIC_LINKER
65 #define GLIBC_DYNAMIC_LINKER_SOFT_FLOAT "/lib/ld-linux.so.3"
66 #define GLIBC_DYNAMIC_LINKER_HARD_FLOAT "/lib/ld-linux-armhf.so.3"
67 #define GLIBC_DYNAMIC_LINKER_DEFAULT GLIBC_DYNAMIC_LINKER_SOFT_FLOAT
68
69 #define GLIBC_DYNAMIC_LINKER \
70 "%{mfloat-abi=hard:" GLIBC_DYNAMIC_LINKER_HARD_FLOAT "} \
71 %{mfloat-abi=soft*:" GLIBC_DYNAMIC_LINKER_SOFT_FLOAT "} \
72 %{!mfloat-abi=*:" GLIBC_DYNAMIC_LINKER_DEFAULT "}"
73
74 /* For ARM musl currently supports four dynamic linkers:
75 - ld-musl-arm.so.1 - for the EABI-derived soft-float ABI
76 - ld-musl-armhf.so.1 - for the EABI-derived hard-float ABI
77 - ld-musl-armeb.so.1 - for the EABI-derived soft-float ABI, EB
78 - ld-musl-armebhf.so.1 - for the EABI-derived hard-float ABI, EB
79 musl does not support the legacy OABI mode.
80 All the dynamic linkers live in /lib.
81 We default to soft-float, EL. */
82 #undef MUSL_DYNAMIC_LINKER
83 #if TARGET_BIG_ENDIAN_DEFAULT
84 #define MUSL_DYNAMIC_LINKER_E "%{mlittle-endian:;:eb}"
85 #else
86 #define MUSL_DYNAMIC_LINKER_E "%{mbig-endian:eb}"
87 #endif
88 #define MUSL_DYNAMIC_LINKER \
89 "/lib/ld-musl-arm" MUSL_DYNAMIC_LINKER_E "%{mfloat-abi=hard:hf}%{mfdpic:-fdpic}.so.1"
90
91 /* At this point, bpabi.h will have clobbered LINK_SPEC. We want to
92 use the GNU/Linux version, not the generic BPABI version. */
93 #undef LINK_SPEC
94 #define LINK_SPEC EABI_LINK_SPEC \
95 LINUX_OR_ANDROID_LD (LINUX_TARGET_LINK_SPEC, \
96 LINUX_TARGET_LINK_SPEC " " ANDROID_LINK_SPEC)
97
98 #undef ASAN_CC1_SPEC
99 #define ASAN_CC1_SPEC "%{%:sanitize(address):-funwind-tables}"
100
101 #define FDPIC_CC1_SPEC ""
102
103 #undef CC1_SPEC
104 #define CC1_SPEC \
105 LINUX_OR_ANDROID_CC (GNU_USER_TARGET_CC1_SPEC " " ASAN_CC1_SPEC " " \
106 FDPIC_CC1_SPEC, \
107 GNU_USER_TARGET_CC1_SPEC " " ASAN_CC1_SPEC " " \
108 ANDROID_CC1_SPEC)
109
110 #define CC1PLUS_SPEC \
111 LINUX_OR_ANDROID_CC ("", ANDROID_CC1PLUS_SPEC)
112
113 #undef LIB_SPEC
114 #define LIB_SPEC \
115 LINUX_OR_ANDROID_LD (GNU_USER_TARGET_LIB_SPEC, \
116 GNU_USER_TARGET_NO_PTHREADS_LIB_SPEC " " ANDROID_LIB_SPEC)
117
118 #undef STARTFILE_SPEC
119 #define STARTFILE_SPEC \
120 LINUX_OR_ANDROID_LD (GNU_USER_TARGET_STARTFILE_SPEC, ANDROID_STARTFILE_SPEC)
121
122 #undef ENDFILE_SPEC
123 #define ENDFILE_SPEC \
124 "%{Ofast|ffast-math|funsafe-math-optimizations:%{!shared:crtfastmath.o%s}} " \
125 LINUX_OR_ANDROID_LD (GNU_USER_TARGET_ENDFILE_SPEC, ANDROID_ENDFILE_SPEC)
126
127 /* Use the default LIBGCC_SPEC, not the version in linux-elf.h, as we
128 do not use -lfloat. */
129 #undef LIBGCC_SPEC
130
131 /* Clear the instruction cache from `beg' to `end'. This is
132 implemented in lib1funcs.S, so ensure an error if this definition
133 is used. */
134 #undef CLEAR_INSN_CACHE
135 #define CLEAR_INSN_CACHE(BEG, END) not_used
136
137 #define ARM_TARGET2_DWARF_FORMAT (DW_EH_PE_pcrel | DW_EH_PE_indirect)