minix/external/gpl3/gcc/files/arm-minix.h
Lionel Sambuc 84d9c625bf Synchronize on NetBSD-CVS (2013/12/1 12:00:00 UTC)
- Fix for possible unset uid/gid in toproto
 - Fix for default mtree style
 - Update libelf
 - Importing libexecinfo
 - Resynchronize GCC, mpc, gmp, mpfr
 - build.sh: Replace params with show-params.
     This has been done as the make target has been renamed in the same
     way, while a new target named params has been added. This new
     target generates a file containing all the parameters, instead of
     printing it on the console.
 - Update test48 with new etc/services (Fix by Ben Gras <ben@minix3.org)
     get getservbyport() out of the inner loop

Change-Id: Ie6ad5226fa2621ff9f0dee8782ea48f9443d2091
2014-07-28 17:05:06 +02:00

150 lines
5.7 KiB
C

/* Definitions for ARM running MINIX using the ELF format
Copyright (C) 2001, 2004, 2007 Free Software Foundation, Inc.
Contributed by David E. O'Brien <obrien@FreeBSD.org> and BSDi.
Adapted for MINIX by Lionel Sambuc <lionel@minix3.org>
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.
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 MINIX_TARGET_CPU_CPP_BUILTINS
#define MINIX_TARGET_CPU_CPP_BUILTINS() \
do \
{ \
TARGET_BPABI_CPP_BUILTINS(); \
if (ARM_EABI_UNWIND_TABLES) \
builtin_define ("__UNWIND_TABLES__"); \
} \
while (0)
/* Define the actual types of some ANSI-mandated types.
Needs to agree with <machine/ansi.h>. GCC defaults come from c-decl.c,
c-common.c, and config/<arch>/<arch>.h. */
#undef SIZE_TYPE
#define SIZE_TYPE "unsigned int"
#undef PTRDIFF_TYPE
#define PTRDIFF_TYPE "int"
#undef WCHAR_TYPE
#define WCHAR_TYPE "int"
#undef WINT_TYPE
#define WINT_TYPE "int"
/* We don't have any limit on the length as out debugger is GDB. */
#undef DBX_CONTIN_LENGTH
/* NetBSD 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)" : ""); \
}
/* VERY BIG NOTE: Change of structure alignment for NetBSD/arm.
There are consequences you should be aware of...
Normally GCC/arm uses a structure alignment of 32 for compatibility
with armcc. This means that structures are padded to a word
boundary. However this causes problems with bugged NetBSD kernel
code (possibly userland code as well - I have not checked every
binary). The nature of this bugged code is to rely on sizeof()
returning the correct size of various structures rounded to the
nearest byte (SCSI and ether code are two examples, the vm system
is another). This code breaks when the structure alignment is 32
as sizeof() will report a word=rounded size. By changing the
structure alignment to 8. GCC will conform to what is expected by
NetBSD.
This has several side effects that should be considered.
1. Structures will only be aligned to the size of the largest member.
i.e. structures containing only bytes will be byte aligned.
structures containing shorts will be half word aligned.
structures containing ints will be word aligned.
This means structures should be padded to a word boundary if
alignment of 32 is required for byte structures etc.
2. A potential performance penalty may exist if strings are no longer
word aligned. GCC will not be able to use word load/stores to copy
short strings.
This modification is not encouraged but with the present state of the
NetBSD source tree it is currently the only solution that meets the
requirements. */
#undef DEFAULT_STRUCTURE_SIZE_BOUNDARY
#define DEFAULT_STRUCTURE_SIZE_BOUNDARY 8
/* Fixed-sized enum by default (-fno-short-enums) */
#undef MINIX_CC1_SPEC
#define MINIX_CC1_SPEC "%{!fshort-enums:%{!fno-short-enums:-fno-short-enums}} "
/* Use by default the new abi and calling standard */
#undef ARM_DEFAULT_ABI
#define ARM_DEFAULT_ABI ARM_ABI_AAPCS
/* LSC: FIXME: When activated, some programs crash on qemu with an illegal
* instruction.
* The cause is unknown (Missing support on MINIX, missing support
* on the emulator, library error...).
*/
#if 0
/* Make sure we use hard-floating point ABI by default */
#undef TARGET_DEFAULT_FLOAT_ABI
#define TARGET_DEFAULT_FLOAT_ABI ARM_FLOAT_ABI_HARD
#endif
#if defined(NETBSD_NATIVE)
/* LSC: On arm, when compiling statically, we need gcc_eh. */
#undef MINIX_LINK_GCC_C_SEQUENCE_SPEC
#define MINIX_LINK_GCC_C_SEQUENCE_SPEC \
"%{static:--start-group} %G %L -lgcc_eh %{static:--end-group}%{!static:%G}"
#endif /* defined(NETBSD_NATIVE) */
/* Default to full VFP if -mhard-float is specified. */
#undef MINIX_SUBTARGET_ASM_FLOAT_SPEC
#define MINIX_SUBTARGET_ASM_FLOAT_SPEC \
"%{mhard-float:{!mfpu=*:-mfpu=vfpv3-d16}} \
%{mfloat-abi=hard:{!mfpu=*:-mfpu=vfpv3-d16}}"
#undef MINIX_SUBTARGET_EXTRA_ASM_SPEC
#define MINIX_SUBTARGET_EXTRA_ASM_SPEC \
"%{mabi=apcs-gnu|mabi=atpcs:-meabi=gnu;:-meabi=5}" \
TARGET_FIX_V4BX_SPEC \
"%{fpic|fpie:-k} %{fPIC|fPIE:-k}"
/* Little endian by default */
#undef TARGET_ENDIAN_DEFAULT
#define TARGET_ENDIAN_DEFAULT 0
#undef SUBTARGET_CPU_DEFAULT
#define SUBTARGET_CPU_DEFAULT TARGET_CPU_cortexa8
#undef TARGET_VERSION
#define TARGET_VERSION fputs (" (MINIX/arm ELF EABI)", stderr);
#undef ARM_EABI_UNWIND_TABLES
#define ARM_EABI_UNWIND_TABLES \
((!USING_SJLJ_EXCEPTIONS && flag_exceptions) || flag_unwind_tables)