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Add our ARM backend to prepare for later gnat cross-compile adventures.

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Rein damit pascal@
This commit is contained in:
tobiasu 2013-01-27 15:00:23 +00:00
parent eca6c378a6
commit ec81b8ac15
4 changed files with 281 additions and 9 deletions
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4
lang/gcc/4.2/Makefile
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@ -1,6 +1,6 @@
# $OpenBSD: Makefile,v 1.89 2012/12/28 14:32:00 espie Exp $
# $OpenBSD: Makefile,v 1.90 2013/01/27 15:00:23 tobiasu Exp $
ONLY_FOR_ARCHS = alpha i386 m68k sparc sparc64 powerpc vax amd64
ONLY_FOR_ARCHS = alpha i386 m68k sparc sparc64 powerpc vax amd64 arm
#BROKEN=adjust for types changes
DPB_PROPERTIES = parallel

23
lang/gcc/4.2/patches/patch-gcc_config_arm_arm_c Normal file
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@ -0,0 +1,23 @@
$OpenBSD: patch-gcc_config_arm_arm_c,v 1.1 2013/01/27 15:00:23 tobiasu Exp $
--- gcc/config/arm/arm.c.orig Sat Jan 26 16:31:12 2013
+++ gcc/config/arm/arm.c Sat Jan 26 16:32:40 2013
@@ -3216,7 +3216,8 @@ legitimize_pic_address (rtx orig, enum machine_mode mo
gcc_assert (!no_new_pseudos);
if (arm_pic_register != INVALID_REGNUM)
{
- cfun->machine->pic_reg = gen_rtx_REG (Pmode, arm_pic_register);
+ if (!cfun->machine->pic_reg)
+ cfun->machine->pic_reg = gen_rtx_REG (Pmode, arm_pic_register);
/* Play games to avoid marking the function as needing pic
if we are being called as part of the cost-estimation
@@ -3228,7 +3229,8 @@ legitimize_pic_address (rtx orig, enum machine_mode mo
{
rtx seq;
- cfun->machine->pic_reg = gen_reg_rtx (Pmode);
+ if (!cfun->machine->pic_reg)
+ cfun->machine->pic_reg = gen_reg_rtx (Pmode);
/* Play games to avoid marking the function as needing pic
if we are being called as part of the cost-estimation

238
lang/gcc/4.2/patches/patch-gcc_config_arm_openbsd_h Normal file
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@ -0,0 +1,238 @@
$OpenBSD: patch-gcc_config_arm_openbsd_h,v 1.1 2013/01/27 15:00:23 tobiasu Exp $
--- gcc/config/arm/openbsd.h.orig Sat Jan 26 16:08:59 2013
+++ gcc/config/arm/openbsd.h Sat Jan 26 16:08:49 2013
@@ -0,0 +1,234 @@
+/* Definitions of target machine for GNU compiler, OpenBSD/arm ELF version.
+ Copyright (C) 2002 Free Software Foundation, Inc.
+ Contributed by Wasabi Systems, Inc.
+
+This file is part of GNU CC.
+
+GNU CC 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 2, or (at your option)
+any later version.
+
+GNU CC 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 GNU CC; see the file COPYING. If not, write to
+the Free Software Foundation, 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA. */
+
+/* Run-time Target Specification. */
+#undef TARGET_VERSION
+#define TARGET_VERSION fputs (" (OpenBSD/arm)", stderr);
+
+/* This is used in ASM_FILE_START. */
+#undef ARM_OS_NAME
+#define ARM_OS_NAME "OpenBSD"
+
+/* Unsigned chars produces much better code than signed. */
+#define DEFAULT_SIGNED_CHAR 0
+
+
+/* This defaults us to little-endian. */
+#ifndef TARGET_ENDIAN_DEFAULT
+#define TARGET_ENDIAN_DEFAULT 0
+#endif
+
+#undef MULTILIB_DEFAULTS
+
+/* strongarm family default cpu. */
+#define SUBTARGET_CPU_DEFAULT TARGET_CPU_strongarm
+
+/* Default is to use APCS-32 mode. */
+
+/* Default it to use ATPCS with soft-VFP. */
+#undef TARGET_DEFAULT
+#define TARGET_DEFAULT \
+ (MASK_APCS_FRAME \
+ | TARGET_ENDIAN_DEFAULT)
+
+
+#define TARGET_OS_CPP_BUILTINS() \
+ do \
+ { \
+ OPENBSD_OS_CPP_BUILTINS_ELF(); \
+ } \
+ while (0)
+
+#undef SUBTARGET_CPP_SPEC
+#define SUBTARGET_CPP_SPEC OBSD_CPP_SPEC
+
+/* OBSD_LINK_SPEC appropriate for OpenBSD. Support for GCC options
+ -static, -assert, and -nostdlib. */
+#undef OBSD_LINK_SPEC
+#ifdef OBSD_NO_DYNAMIC_LIBRARIES
+#define OBSD_LINK_SPEC \
+ "%{!nostdlib:%{!r*:%{!e*:-e __start}}} %{assert*}"
+#else
+#define OBSD_LINK_SPEC \
+ "%{!shared:%{!nostdlib:%{!r*:%{!e*:-e __start}}}} \
+ %{shared:-shared} %{R*} \
+ %{static:-Bstatic} \
+ %{!static:-Bdynamic} \
+ %{rdynamic:-export-dynamic} \
+ %{assert*} \
+ %{!dynamic-linker:-dynamic-linker /usr/libexec/ld.so}"
+#endif
+
+#undef SUBTARGET_EXTRA_ASM_SPEC
+#define SUBTARGET_EXTRA_ASM_SPEC \
+ "-matpcs %{fpic|fPIC|fpie|fPIE:-k}"
+
+/* Default floating point model is soft-VFP.
+ FIXME: -mhard-float currently implies FPA. */
+#undef SUBTARGET_ASM_FLOAT_SPEC
+#define SUBTARGET_ASM_FLOAT_SPEC \
+ "%{mhard-float:-mfpu=fpa} \
+ %{msoft-float:-mfpu=softvfp} \
+ %{!mhard-float: \
+ %{!msoft-float:-mfpu=softvfp}}"
+
+#undef SUBTARGET_EXTRA_SPECS
+#define SUBTARGET_EXTRA_SPECS \
+ { "subtarget_extra_asm_spec", SUBTARGET_EXTRA_ASM_SPEC }, \
+ { "subtarget_asm_float_spec", SUBTARGET_ASM_FLOAT_SPEC }, \
+ { "openbsd_link_spec", OBSD_LINK_SPEC }, \
+ { "openbsd_entry_point", OPENBSD_ENTRY_POINT },
+
+#define OPENBSD_ENTRY_POINT "__start"
+
+/* Pass -X to the linker so that it will strip symbols starting with 'L' */
+#undef LINK_SPEC
+#define LINK_SPEC \
+ "-X %{mbig-endian:-EB} %{mlittle-endian:-EL} \
+ %(openbsd_link_spec)"
+
+/* Make GCC agree with <machine/_types.h>. */
+
+#undef SIZE_TYPE
+#define SIZE_TYPE "long unsigned int"
+
+#undef PTRDIFF_TYPE
+#define PTRDIFF_TYPE "long int"
+
+#undef INTMAX_TYPE
+#define INTMAX_TYPE "long long int"
+
+#undef UINTMAX_TYPE
+#define UINTMAX_TYPE "long long unsigned int"
+
+#undef WCHAR_TYPE
+#define WCHAR_TYPE "int"
+
+#undef WCHAR_TYPE_SIZE
+#define WCHAR_TYPE_SIZE 32
+
+/* We don't have any limit on the length as out debugger is GDB. */
+#undef DBX_CONTIN_LENGTH
+
+/* OpenBSD and NetBSD do their 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", \
+ NEED_PLT_RELOC ? "(PLT)" : ""); \
+}
+
+/* On the ARM `@' introduces a comment, so we must use something else
+ for .type directives. */
+#undef TYPE_OPERAND_FMT
+#define TYPE_OPERAND_FMT "%%%s"
+
+#undef FPUTYPE_DEFAULT
+#define FPUTYPE_DEFAULT FPUTYPE_VFP
+
+/* VERY BIG NOTE: Change of structure alignment for OpenBSD|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 OpenBSD|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
+ OpenBSD|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 alinged.
+ 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
+ OpenBSD|NetBSD source tree it is currently the only solution that meets the
+ requirements. */
+
+#undef DEFAULT_STRUCTURE_SIZE_BOUNDARY
+#define DEFAULT_STRUCTURE_SIZE_BOUNDARY 8
+
+/* 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)
+
+/* Provide a STARTFILE_SPEC appropriate for OpenBSD ELF. Here we
+ provide support for the special GCC option -static. On ELF
+ targets, we also add the crtbegin.o file, which provides part
+ of the support for getting C++ file-scope static objects
+ constructed before entering "main". */
+
+#define OPENBSD_STARTFILE_SPEC \
+ "%{!shared: \
+ %{pg:gcrt0%O%s} \
+ %{!pg: \
+ %{p:gcrt0%O%s} \
+ %{!p:crt0%O%s}}} \
+ %:if-exists(crti%O%s) \
+ %{static:%:if-exists-else(crtbeginT%O%s crtbegin%O%s)} \
+ %{!static: \
+ %{!shared:crtbegin%O%s} %{shared:crtbeginS%O%s}}"
+
+#undef STARTFILE_SPEC
+#define STARTFILE_SPEC OPENBSD_STARTFILE_SPEC
+
+/* Provide an ENDFILE_SPEC appropriate for OpenBSD ELF. Here we
+add crtend.o, which provides part of the support for getting
+C++ file-scope static objects deconstructed after exiting "main". */
+
+#define OPENBSD_ENDFILE_SPEC \
+ "%{!shared:crtend%O%s} %{shared:crtendS%O%s} \
+ %:if-exists(crtn%O%s)"
+
+#undef ENDFILE_SPEC
+#define ENDFILE_SPEC OPENBSD_ENDFILE_SPEC
+

25
lang/gcc/4.2/patches/patch-gcc_config_gcc
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@ -1,5 +1,5 @@
--- gcc/config.gcc.orig Thu Mar 13 20:11:43 2008
+++ gcc/config.gcc Wed Aug 29 20:54:50 2012
+++ gcc/config.gcc Sat Jan 26 17:24:34 2013
@@ -555,6 +555,11 @@ case ${target} in
*-*-openbsd2.*|*-*-openbsd3.[012])
tm_defines="${tm_defines} HAS_LIBC_R=1" ;;
@ -27,7 +27,18 @@
;;
alpha*-dec-osf[45]*)
if test x$stabs = xyes
@@ -1085,10 +1090,16 @@ i[34567]86-*-openbsd2.*|i[34567]86-*openbsd3.[0123])
@@ -694,6 +699,10 @@ arm*-*-freebsd*|strongarm*-*-freebsd*)
tm_file="dbxelf.h elfos.h ${fbsd_tm_file} arm/elf.h arm/aout.h arm/freebsd.h arm/arm.h"
tmake_file="${tmake_file} arm/t-arm arm/t-strongarm-elf"
;;
+arm-*-openbsd*)
+ tm_file="dbxelf.h elfos.h arm/elf.h arm/aout.h arm/arm.h openbsd.h openbsd-libpthread.h arm/openbsd.h"
+ tmake_file="${tmake_file} arm/t-arm"
+ ;;
arm*-*-netbsdelf*)
tm_file="dbxelf.h elfos.h netbsd.h netbsd-elf.h arm/elf.h arm/aout.h arm/arm.h arm/netbsd-elf.h"
tmake_file="${tmake_file} arm/t-arm arm/t-netbsd"
@@ -1085,10 +1094,16 @@ i[34567]86-*-openbsd2.*|i[34567]86-*openbsd3.[0123])
;;
i[34567]86-*-openbsd*)
tm_file="${tm_file} i386/unix.h i386/att.h dbxelf.h elfos.h"
@ -45,7 +56,7 @@
i[34567]86-*-coff*)
tm_file="${tm_file} i386/unix.h i386/bsd.h i386/gas.h dbxcoff.h i386/i386-coff.h"
use_fixproto=yes
@@ -1479,7 +1490,7 @@ m68010-*-netbsdelf* | m68k*-*-netbsdelf*)
@@ -1479,7 +1494,7 @@ m68010-*-netbsdelf* | m68k*-*-netbsdelf*)
m68k*-*-openbsd*)
# needed to unconfuse gdb
tm_defines="${tm_defines} OBSD_OLD_GAS TARGET_DEFAULT=(MASK_68020|MASK_68881|MASK_BITFIELD)"
@ -54,7 +65,7 @@
tmake_file="t-libc-ok t-openbsd m68k/t-openbsd"
# we need collect2 until our bug is fixed...
use_collect2=yes
@@ -1569,7 +1580,7 @@ mips*-*-linux*) # Linux MIPS, either endian.
@@ -1569,7 +1584,7 @@ mips*-*-linux*) # Linux MIPS, either endian.
mips*-*-openbsd*)
tm_defines="${tm_defines} OBSD_HAS_DECLARE_FUNCTION_NAME OBSD_HAS_DECLARE_OBJECT OBSD_HAS_CORRECT_SPECS"
target_cpu_default="MASK_ABICALLS"
@ -63,7 +74,7 @@
case ${target} in
mips*el-*-openbsd*)
tm_defines="${tm_defines} TARGET_ENDIAN_DEFAULT=0";;
@@ -1687,11 +1698,11 @@ pdp11-*-bsd)
@@ -1687,11 +1702,11 @@ pdp11-*-bsd)
pdp11-*-*)
use_fixproto=yes
;;
@ -80,7 +91,7 @@
powerpc64-*-linux*)
tm_file="${tm_file} dbxelf.h elfos.h svr4.h freebsd-spec.h rs6000/sysv4.h"
test x$with_cpu != x || cpu_is_64bit=yes
@@ -2163,7 +2174,8 @@ sparc-*-netbsdelf*)
@@ -2163,7 +2178,8 @@ sparc-*-netbsdelf*)
extra_options="${extra_options} sparc/long-double-switch.opt"
;;
sparc64-*-openbsd*)
@ -90,7 +101,7 @@
extra_options="${extra_options} sparc/little-endian.opt"
gas=yes gnu_ld=yes
with_cpu=ultrasparc
@@ -2408,7 +2420,7 @@ vax-*-netbsd*)
@@ -2408,7 +2424,7 @@ vax-*-netbsd*)
use_collect2=yes
;;
vax-*-openbsd*)