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1 /* Definitions for ARM EABI ucLinux
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2 Copyright (C) 2006, 2007, 2008 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 You should have received a copy of the GNU General Public License
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18 along with GCC; see the file COPYING3. If not see
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19 <http://www.gnu.org/licenses/>. */
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20
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21 /* Override settings that are different to the uclinux-elf or
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22 bpabi defaults. */
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23
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24 #undef TARGET_DEFAULT
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25 #define TARGET_DEFAULT (MASK_SINGLE_PIC_BASE | MASK_INTERWORK)
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26
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27 /* On EABI GNU/Linux, we want both the BPABI builtins and the
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28 GNU/Linux builtins. */
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29 #undef TARGET_OS_CPP_BUILTINS
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30 #define TARGET_OS_CPP_BUILTINS() \
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31 do \
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32 { \
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33 TARGET_BPABI_CPP_BUILTINS(); \
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34 builtin_define ("__uClinux__"); \
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35 builtin_define ("__gnu_linux__"); \
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36 builtin_define_std ("linux"); \
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37 builtin_define_std ("unix"); \
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38 builtin_assert ("system=linux"); \
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39 builtin_assert ("system=unix"); \
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40 builtin_assert ("system=posix"); \
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41 } \
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42 while (false)
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43
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44 #undef SUBTARGET_EXTRA_LINK_SPEC
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45 #define SUBTARGET_EXTRA_LINK_SPEC " -m armelf_linux_eabi -elf2flt" \
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46 " --pic-veneer --target2=abs"
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47
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48 /* We default to the "aapcs-linux" ABI so that enums are int-sized by
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49 default. */
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50 #undef ARM_DEFAULT_ABI
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51 #define ARM_DEFAULT_ABI ARM_ABI_AAPCS_LINUX
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52
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53 /* Clear the instruction cache from `beg' to `end'. This makes an
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54 inline system call to SYS_cacheflush. */
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55 #undef CLEAR_INSN_CACHE
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56 #define CLEAR_INSN_CACHE(BEG, END) \
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57 { \
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58 register unsigned long _beg __asm ("a1") = (unsigned long) (BEG); \
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59 register unsigned long _end __asm ("a2") = (unsigned long) (END); \
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60 register unsigned long _flg __asm ("a3") = 0; \
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61 register unsigned long _scno __asm ("r7") = 0xf0002; \
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62 __asm __volatile ("swi 0x0 @ sys_cacheflush" \
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63 : "=r" (_beg) \
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64 : "0" (_beg), "r" (_end), "r" (_flg), "r" (_scno)); \
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65 }
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66
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