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/* Configuration file for ARM BPABI targets.
Copyright (C) 2004-2022 Free Software Foundation, Inc.
Contributed by CodeSourcery, LLC
This file is part of GCC.
GCC is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published
by the Free Software Foundation; either version 3, or (at your
option) any later version.
GCC is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
License for more details.
Under Section 7 of GPL version 3, you are granted additional
permissions described in the GCC Runtime Library Exception, version
3.1, as published by the Free Software Foundation.
You should have received a copy of the GNU General Public License and
a copy of the GCC Runtime Library Exception along with this program;
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
<http://www.gnu.org/licenses/>. */
/* Use the AAPCS ABI by default. */
#define ARM_DEFAULT_ABI ARM_ABI_AAPCS
/* Assume that AAPCS ABIs should adhere to the full BPABI. */
#define TARGET_BPABI (TARGET_AAPCS_BASED)
/* BPABI targets use EABI frame unwinding tables. */
#undef ARM_UNWIND_INFO
#define ARM_UNWIND_INFO 1
/* TARGET_BIG_ENDIAN_DEFAULT is set in
config.gcc for big endian configurations. */
#if TARGET_BIG_ENDIAN_DEFAULT
#define TARGET_ENDIAN_DEFAULT MASK_BIG_END
#else
#define TARGET_ENDIAN_DEFAULT 0
#endif
/* EABI targets should enable interworking by default. */
#undef TARGET_DEFAULT
#define TARGET_DEFAULT (MASK_INTERWORK | TARGET_ENDIAN_DEFAULT)
/* The ARM BPABI functions return a boolean; they use no special
calling convention. */
#define FLOAT_LIB_COMPARE_RETURNS_BOOL(MODE, COMPARISON) TARGET_BPABI
/* The BPABI integer comparison routines return { -1, 0, 1 }. */
#define TARGET_LIB_INT_CMP_BIASED !TARGET_BPABI
#define TARGET_FIX_V4BX_SPEC " %{mcpu=arm8|mcpu=arm810|mcpu=strongarm*"\
"|march=armv4|mcpu=fa526|mcpu=fa626:--fix-v4bx}"
#define TARGET_FDPIC_ASM_SPEC ""
#define BE8_LINK_SPEC \
"%{!r:%{!mbe32:%:be8_linkopt(%{mlittle-endian:little}" \
" %{mbig-endian:big}" \
" %{mbe8:be8}" \
" %{march=*:arch %*})}}"
/* Tell the assembler to build BPABI binaries. */
#undef SUBTARGET_EXTRA_ASM_SPEC
#define SUBTARGET_EXTRA_ASM_SPEC \
"%{mabi=apcs-gnu|mabi=atpcs:-meabi=gnu;:-meabi=5}" TARGET_FIX_V4BX_SPEC \
TARGET_FDPIC_ASM_SPEC
#ifndef SUBTARGET_EXTRA_LINK_SPEC
#define SUBTARGET_EXTRA_LINK_SPEC ""
#endif
/* Split out the EABI common values so other targets can use it. */
#define EABI_LINK_SPEC \
TARGET_FIX_V4BX_SPEC BE8_LINK_SPEC
/* The generic link spec in elf.h does not support shared libraries. */
#define BPABI_LINK_SPEC \
"%{mbig-endian:-EB} %{mlittle-endian:-EL} " \
"%{static:-Bstatic} %{shared:-shared} %{symbolic:-Bsymbolic} " \
"-X" SUBTARGET_EXTRA_LINK_SPEC EABI_LINK_SPEC
#undef LINK_SPEC
#define LINK_SPEC BPABI_LINK_SPEC
/* The BPABI requires that we always use an out-of-line implementation
of RTTI comparison, even if the target supports weak symbols,
because the same object file might be used on a target that does
not support merging symbols across DLL boundaries. This macro is
broken out separately so that it can be used within
TARGET_OS_CPP_BUILTINS in configuration files for systems based on
the BPABI. */
#define TARGET_BPABI_CPP_BUILTINS() \
do \
{ \
builtin_define ("__GXX_TYPEINFO_EQUALITY_INLINE=0"); \
} \
while (false)
#undef TARGET_OS_CPP_BUILTINS
#define TARGET_OS_CPP_BUILTINS() \
TARGET_BPABI_CPP_BUILTINS()
/* The BPABI specifies the use of .{init,fini}_array. Therefore, we
do not want GCC to put anything into the .{init,fini} sections. */
#undef INIT_SECTION_ASM_OP
#undef FINI_SECTION_ASM_OP
#define INIT_ARRAY_SECTION_ASM_OP ARM_EABI_CTORS_SECTION_OP
#define FINI_ARRAY_SECTION_ASM_OP ARM_EABI_DTORS_SECTION_OP
/* The legacy _mcount implementation assumes r11 points to a
4-word APCS frame. This is generally not true for EABI targets,
particularly not in Thumb mode. We assume the mcount
implementation does not require a counter variable (No Counter).
Note that __gnu_mcount_nc will be entered with a misaligned stack.
This is OK because it uses a special calling convention anyway. */
#undef NO_PROFILE_COUNTERS
#define NO_PROFILE_COUNTERS 1
#undef ARM_FUNCTION_PROFILER
#define ARM_FUNCTION_PROFILER(STREAM, LABELNO) \
{ \
fprintf (STREAM, "\tpush\t{lr}\n"); \
fprintf (STREAM, "\tbl\t__gnu_mcount_nc\n"); \
}
#undef SUBTARGET_FRAME_POINTER_REQUIRED
#define SUBTARGET_FRAME_POINTER_REQUIRED 0
/* __gnu_mcount_nc restores the original LR value before returning. Ensure
that there is no unnecessary hook set up. */
#undef PROFILE_HOOK
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