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/* Definitions of target machine for GNU compiler, FreeBSD/arm version.
Copyright (C) 2002-2024 Free Software Foundation, Inc.
Contributed by Wasabi Systems, Inc.
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
along with GCC; see the file COPYING3. If not see
<http://www.gnu.org/licenses/>. */
#undef SUBTARGET_CPP_SPEC
#define SUBTARGET_CPP_SPEC FBSD_CPP_SPEC
#undef SUBTARGET_EXTRA_SPECS
#define SUBTARGET_EXTRA_SPECS \
{ "subtarget_extra_asm_spec", SUBTARGET_EXTRA_ASM_SPEC }, \
{ "subtarget_asm_float_spec", SUBTARGET_ASM_FLOAT_SPEC }, \
{ "fbsd_dynamic_linker", FBSD_DYNAMIC_LINKER }
#undef SUBTARGET_EXTRA_ASM_SPEC
#define SUBTARGET_EXTRA_ASM_SPEC \
"%{mabi=apcs-gnu|mabi=atpcs:-meabi=gnu;:-meabi=5} " TARGET_FIX_V4BX_SPEC " \
%{" FPIE_OR_FPIC_SPEC ":-k}"
#undef SUBTARGET_ASM_FLOAT_SPEC
#ifdef TARGET_FREEBSD_ARM_HARD_FLOAT
/* Default to full vfp if we build for arm*hf. */
#define SUBTARGET_ASM_FLOAT_SPEC "%{!mfpu=*:-mfpu=vfp}"
#else
#define SUBTARGET_ASM_FLOAT_SPEC "%{!mfpu=*:-mfpu=softvfp}"
#endif
#undef LINK_SPEC
#define LINK_SPEC " \
%{p:%nconsider using `-pg' instead of `-p' with gprof (1)} \
" FBSD_LINK_PG_NOTE " \
%{v:-V} \
%{assert*} %{R*} %{rpath*} %{defsym*} \
%{shared:-Bshareable %{h*} %{soname*}} \
%{!shared: \
%{!static: \
%{rdynamic:-export-dynamic} \
%{!dynamic-linker:-dynamic-linker %(fbsd_dynamic_linker) }} \
%{static:-Bstatic}} \
%{!static:--hash-style=both --enable-new-dtags} \
%{symbolic:-Bsymbolic} \
-X %{mbig-endian:-EB} %{mlittle-endian:-EL}"
/* 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
#define TARGET_ENDIAN_OPTION "mbig-endian"
#define TARGET_LINKER_EMULATION "armelfb_fbsd"
#else
#define TARGET_ENDIAN_DEFAULT 0
#define TARGET_ENDIAN_OPTION "mlittle-endian"
#define TARGET_LINKER_EMULATION "armelf_fbsd"
#endif
#undef SUBTARGET_EXTRA_LINK_SPEC
#define SUBTARGET_EXTRA_LINK_SPEC " -m " TARGET_LINKER_EMULATION " -p"
#undef TARGET_OS_CPP_BUILTINS
#define TARGET_OS_CPP_BUILTINS() \
do \
{ \
FBSD_TARGET_OS_CPP_BUILTINS (); \
TARGET_BPABI_CPP_BUILTINS (); \
} \
while (false)
/* We default to a soft-float ABI so that binaries can run on all
target hardware. */
#undef TARGET_DEFAULT_FLOAT_ABI
#ifdef TARGET_FREEBSD_ARM_HARD_FLOAT
#define TARGET_DEFAULT_FLOAT_ABI ARM_FLOAT_ABI_HARD
#else
#define TARGET_DEFAULT_FLOAT_ABI ARM_FLOAT_ABI_SOFT
#endif
#undef ARM_DEFAULT_ABI
/* AACPS_LINUX has access to kernel atomic ops while we don't.
But AACPS defaults to short_enums. */
#define ARM_DEFAULT_ABI ARM_ABI_AAPCS_LINUX
#undef TARGET_DEFAULT
#define TARGET_DEFAULT (MASK_INTERWORK | TARGET_ENDIAN_DEFAULT)
/* We do not have any MULTILIB_OPTIONS specified, so there are no
MULTILIB_DEFAULTS. */
#undef MULTILIB_DEFAULTS
/* Use the AAPCS type for wchar_t, override the one from config/freebsd.h. */
#undef WCHAR_TYPE
#define WCHAR_TYPE "unsigned int"
#undef WCHAR_TYPE_SIZE
#define WCHAR_TYPE_SIZE BITS_PER_WORD
/* FreeBSD 10 does not support unaligned access for armv6 and up.
Unaligned access support was added in FreeBSD 11. */
#if FBSD_MAJOR < 11
#define SUBTARGET_OVERRIDE_INTERNAL_OPTIONS \
do { \
if (opts_set->x_unaligned_access == 1) \
warning (0, "target OS does not support unaligned accesses"); \
if (opts->x_unaligned_access) \
opts->x_unaligned_access = 0; \
} while (0)
#endif
#undef MAX_SYNC_LIBFUNC_SIZE
#define MAX_SYNC_LIBFUNC_SIZE 4 /* UNITS_PER_WORD not defined yet. */
/* FreeBSD does its profiling differently to the Acorn compiler. We
don't need a word following the mcount call; and to skip it
requires either an assembly stub or use of fomit-frame-pointer when
compiling the profiling functions. Since we break Acorn CC
compatibility below a little more won't hurt. */
#undef ARM_FUNCTION_PROFILER
#define ARM_FUNCTION_PROFILER(STREAM,LABELNO) \
{ \
asm_fprintf (STREAM, "\tmov\t%Rip, %Rlr\n"); \
asm_fprintf (STREAM, "\tbl\t__mcount%s\n", \
(TARGET_ARM && NEED_PLT_RELOC) \
? "(PLT)" : ""); \
}
/* Clear the instruction cache from `BEG' to `END'. This makes a
call to the ARM_SYNC_ICACHE architecture specific syscall. */
#define CLEAR_INSN_CACHE(BEG, END) \
do \
{ \
extern int sysarch (int number, void *args); \
struct \
{ \
unsigned int addr; \
int len; \
} s; \
s.addr = (unsigned int) (BEG); \
s.len = (END) - (BEG); \
(void) sysarch (0, &s); \
} \
while (0)
/* This is how we tell the assembler that two symbols have the same value. */
#define ASM_OUTPUT_DEF(FILE, NAME1, NAME2) \
do \
{ \
assemble_name (FILE, NAME1); \
fputs (" = ", FILE); \
assemble_name (FILE, NAME2); \
fputc ('\n', FILE); \
} \
while (0)
/* Add .note.GNU-stack. */
#undef NEED_INDICATE_EXEC_STACK
#define NEED_INDICATE_EXEC_STACK 1
#define ARM_TARGET2_DWARF_FORMAT (DW_EH_PE_pcrel | DW_EH_PE_indirect)
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