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1 /* Definitions for ARM EABI ucLinux
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2 Copyright (C) 2006-2017 Free Software Foundation, Inc.
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3 Contributed by Paul Brook <paul@codesourcery.com>
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4
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5 This file is part of GCC.
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6
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7 GCC is free software; you can redistribute it and/or modify it
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8 under the terms of the GNU General Public License as published
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9 by the Free Software Foundation; either version 3, or (at your
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10 option) any later version.
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11
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12 GCC is distributed in the hope that it will be useful, but WITHOUT
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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14 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
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15 License for more details.
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16
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17 Under Section 7 of GPL version 3, you are granted additional
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18 permissions described in the GCC Runtime Library Exception, version
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19 3.1, as published by the Free Software Foundation.
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20
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21 You should have received a copy of the GNU General Public License and
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22 a copy of the GCC Runtime Library Exception along with this program;
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23 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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24 <http://www.gnu.org/licenses/>. */
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25
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26 /* Override settings that are different to the uclinux-elf or
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27 bpabi defaults. */
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28
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29 #undef TARGET_DEFAULT
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30 #define TARGET_DEFAULT (MASK_SINGLE_PIC_BASE | MASK_INTERWORK)
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31
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32 /* On EABI GNU/Linux, we want both the BPABI builtins and the
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33 GNU/Linux builtins. */
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34 #undef TARGET_OS_CPP_BUILTINS
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35 #define TARGET_OS_CPP_BUILTINS() \
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36 do \
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37 { \
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38 TARGET_BPABI_CPP_BUILTINS(); \
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39 builtin_define ("__uClinux__"); \
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40 builtin_define ("__gnu_linux__"); \
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41 builtin_define_std ("linux"); \
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42 builtin_define_std ("unix"); \
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43 builtin_assert ("system=linux"); \
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44 builtin_assert ("system=unix"); \
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45 builtin_assert ("system=posix"); \
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46 } \
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47 while (false)
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48
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49 #undef SUBTARGET_EXTRA_LINK_SPEC
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50 #define SUBTARGET_EXTRA_LINK_SPEC " -m armelf_linux_eabi -elf2flt" \
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51 " --pic-veneer --target2=abs"
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52
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53 /* We default to the "aapcs-linux" ABI so that enums are int-sized by
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54 default. */
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55 #undef ARM_DEFAULT_ABI
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56 #define ARM_DEFAULT_ABI ARM_ABI_AAPCS_LINUX
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57
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58 /* Clear the instruction cache from `beg' to `end'. This makes an
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59 inline system call to SYS_cacheflush. */
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60 #undef CLEAR_INSN_CACHE
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61 #define CLEAR_INSN_CACHE(BEG, END) \
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62 { \
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63 register unsigned long _beg __asm ("a1") = (unsigned long) (BEG); \
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64 register unsigned long _end __asm ("a2") = (unsigned long) (END); \
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65 register unsigned long _flg __asm ("a3") = 0; \
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66 register unsigned long _scno __asm ("r7") = 0xf0002; \
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67 __asm __volatile ("swi 0x0 @ sys_cacheflush" \
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68 : "=r" (_beg) \
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69 : "0" (_beg), "r" (_end), "r" (_flg), "r" (_scno)); \
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70 }
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71
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72 #define ARM_TARGET2_DWARF_FORMAT DW_EH_PE_absptr
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