+2017-08-01 Jerome Lambourg <lambourg@adacore.com>
+ Doug Rupp <rupp@adacore.com>
+ Olivier Hainque <hainque@adacore.com>
+
+ * config.gcc (arm-wrs-vxworks*): Rework to handle arm-wrs-vxworks7 as
+ well as arm-wrs-vxworks. Update target_cpu_name from arm6 (arch v3) to
+ arm8 (arch v4).
+ * config/arm/vxworks.h (MAYBE_TARGET_BPABI_CPP_BUILTINS): New, helper
+ for TARGET_OS_CPP_BUILTIN.
+ (TARGET_OS_CPP_BUILTIN): Invoke MAYBE_TARGET_BPABI_CPP_BUILTINS(),
+ refine CPU definitions for arm_arch5 and add those for arm_arch6 and
+ arm_arch7.
+ (MAYBE_ASM_ABI_SPEC): New, helper for SUBTARGET_EXTRA_ASM_SPEC,
+ passing required abi options to the assembler for EABI configurations.
+ (EXTRA_CC1_SPEC): New macro, to help prevent the implicit production
+ of .text.hot and .text.unlikely sections for kernel modules when
+ using ARM style exceptions.
+ (CC1_SPEC): Remove obsolete attempt at mimicking Diab toolchain
+ options. Add EXTRA_CC1_SPEC.
+ (VXWORKS_ENDIAN_SPEC): Adjust comment and remove handling of Diab
+ toolchain options.
+ (DWARF2_UNWIND_INFO): Redefine to handle the pre/post VxWorks 7
+ transition.
+ (ARM_TARGET2_DWARF_FORMAT): Define.
+ * config/arm/t-vxworks: Adjust multilib control to removal of the
+ Diab command line options.
+
2017-08-01 Martin Liska <mliska@suse.cz>
PR gcov-profile/81561
big*) tm_file="arc/big.h ${tm_file}"
esac
;;
-arm-wrs-vxworks)
- tm_file="elfos.h arm/elf.h arm/aout.h ${tm_file} vx-common.h vxworks.h arm/vxworks.h"
+arm-wrs-vxworks|arm-wrs-vxworks7)
extra_options="${extra_options} arm/vxworks.opt"
tmake_file="${tmake_file} arm/t-arm arm/t-vxworks"
- target_cpu_cname="arm6"
+ case $target in
+ *-vxworks7)
+ # VxWorks7 on ARM adheres to the ARM Base Platform ABI
+ tmake_file="${tmake_file} arm/t-bpabi"
+ tm_file="arm/bpabi.h ${tm_file}"
+ # The BPABI long long divmod functions return a 128-bit value in
+ # registers r0-r3.
+ need_64bit_hwint=yes
+ default_use_cxa_atexit=yes
+ ;;
+ *) ;;
+ esac
+ tm_file="elfos.h arm/elf.h arm/aout.h ${tm_file} vx-common.h vxworks.h arm/vxworks.h"
+ target_cpu_cname="arm8"
;;
arm*-*-freebsd*) # ARM FreeBSD EABI
tm_file="dbxelf.h elfos.h ${fbsd_tm_file} arm/elf.h"
# along with GCC; see the file COPYING3. If not see
# <http://www.gnu.org/licenses/>.
-MULTILIB_OPTIONS = \
- mrtp fPIC \
- t4/t4be/t4t/t4tbe/t5/t5be/t5t/t5tbe/tstrongarm/txscale/txscalebe
-MULTILIB_MATCHES = fPIC=fpic
-# Don't build -fPIC multilibs for kernel or Thumb code.
-MULTILIB_EXCEPTIONS = fPIC* mrtp/fPIC/*t[45]t*
+MULTILIB_OPTIONS = mrtp fPIC
+
+# -fPIC alone is not supported, only together with -mrtp
+MULTILIB_EXCEPTIONS = fPIC
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
<http://www.gnu.org/licenses/>. */
+/* TARGET_OS_CPP_BUILTINS, down to BPABI if defined. */
+#if defined (TARGET_BPABI_CPP_BUILTINS)
+#define MAYBE_TARGET_BPABI_CPP_BUILTINS TARGET_BPABI_CPP_BUILTINS
+#else
+#define MAYBE_TARGET_BPABI_CPP_BUILTINS()
+#endif
+
+#undef TARGET_OS_CPP_BUILTINS
#define TARGET_OS_CPP_BUILTINS() \
do { \
if (TARGET_BIG_END) \
\
if (arm_arch_xscale) \
builtin_define ("CPU=XSCALE"); \
+ else if (arm_arch7) \
+ { \
+ if (!arm_arch_notm) \
+ builtin_define ("CPU=ARMARCH7M"); \
+ else if (TARGET_THUMB) \
+ builtin_define ("CPU=ARMARCH7_T2"); \
+ else \
+ builtin_define ("CPU=ARMARCH7"); \
+ } \
+ else if (arm_arch6) \
+ { \
+ if (TARGET_THUMB) \
+ builtin_define ("CPU=ARMARCH6_T"); \
+ else \
+ builtin_define ("CPU=ARMARCH6"); \
+ } \
else if (arm_arch5) \
- builtin_define ("CPU=ARMARCH5"); \
+ { \
+ if (TARGET_THUMB) \
+ builtin_define ("CPU=ARMARCH5_T"); \
+ else \
+ builtin_define ("CPU=ARMARCH5"); \
+ } \
else if (arm_arch4) \
{ \
if (TARGET_THUMB) \
builtin_define ("CPU=ARMARCH4"); \
} \
VXWORKS_OS_CPP_BUILTINS (); \
+ MAYBE_TARGET_BPABI_CPP_BUILTINS (); \
} while (0)
#undef SUBTARGET_OVERRIDE_OPTIONS
#undef SUBTARGET_CPP_SPEC
#define SUBTARGET_CPP_SPEC "-D__ELF__" VXWORKS_ADDITIONAL_CPP_SPEC
+/* .text.hot and .text.unlikely sections are badly handled by the
+ VxWorks kernel mode loader for ARM style exceptions. */
+
+#if ARM_UNWIND_INFO
+#define EXTRA_CC1_SPEC "%{!mrtp:-fno-reorder-functions}"
+#else
+#define EXTRA_CC1_SPEC
+#endif
+
#undef CC1_SPEC
-#define CC1_SPEC \
-"%{tstrongarm:-mlittle-endian -mcpu=strongarm ; \
- t4: -mlittle-endian -march=armv4 ; \
- t4be: -mbig-endian -march=armv4 ; \
- t4t: -mthumb -mthumb-interwork -mlittle-endian -march=armv4t ; \
- t4tbe: -mthumb -mthumb-interwork -mbig-endian -march=armv4t ; \
- t5: -mlittle-endian -march=armv5 ; \
- t5be: -mbig-endian -march=armv5 ; \
- t5t: -mthumb -mthumb-interwork -mlittle-endian -march=armv5 ; \
- t5tbe: -mthumb -mthumb-interwork -mbig-endian -march=armv5 ; \
- txscale: -mlittle-endian -mcpu=xscale ; \
- txscalebe: -mbig-endian -mcpu=xscale ; \
- : -march=armv4}"
-
-/* Pass -EB for big-endian targets. */
-#define VXWORKS_ENDIAN_SPEC \
- "%{mbig-endian|t4be|t4tbe|t5be|t5tbe|txscalebe:-EB}"
+#define CC1_SPEC "" EXTRA_CC1_SPEC
+
+/* Translate an explicit -mbig-endian as an explicit -EB to assembler
+ and linker, and pass abi options matching the target expectations
+ or command-line requests. */
+#define VXWORKS_ENDIAN_SPEC "%{mbig-endian:-EB}"
+
+#if defined (TARGET_BPABI_CPP_BUILTINS)
+#define MAYBE_ASM_ABI_SPEC \
+ "%{mabi=apcs-gnu|mabi=atpcs:-meabi=gnu;:-meabi=5}" TARGET_FIX_V4BX_SPEC
+#else
+#define MAYBE_ASM_ABI_SPEC
+#endif
#undef SUBTARGET_EXTRA_ASM_SPEC
-#define SUBTARGET_EXTRA_ASM_SPEC VXWORKS_ENDIAN_SPEC
+#define SUBTARGET_EXTRA_ASM_SPEC MAYBE_ASM_ABI_SPEC " " VXWORKS_ENDIAN_SPEC
#undef LINK_SPEC
#define LINK_SPEC VXWORKS_LINK_SPEC " " VXWORKS_ENDIAN_SPEC
#undef ENDFILE_SPEC
#define ENDFILE_SPEC VXWORKS_ENDFILE_SPEC
+/* For exceptions, pre VX7 uses DWARF2 info, VX7 uses ARM unwinding. */
+#undef DWARF2_UNWIND_INFO
+#define DWARF2_UNWIND_INFO (!TARGET_VXWORKS7)
+
+#undef ARM_TARGET2_DWARF_FORMAT
+#define ARM_TARGET2_DWARF_FORMAT \
+ (TARGET_VXWORKS_RTP ? DW_EH_PE_pcrel : DW_EH_PE_absptr)
+
/* There is no default multilib. */
#undef MULTILIB_DEFAULTS
+2017-08-01 Jerome Lambourg <lambourg@adacore.com>
+ Doug Rupp <rupp@adacore.com>
+ Olivier Hainque <hainque@adacore.com>
+
+ * config.host (arm-wrs-vxworks*): Rework to handle arm-wrs-vxworks7
+ as well as arm-wrs-vxworks.
+ * config/arm/t-vxworks7: New file. Add unwind-arm-vxworks.c to
+ LIB2ADDEH.
+ * config/arm/unwind-arm-vxworks.c: New file. Provide dummy
+ __exidx_start and __exidx_end for downloadable modules.
+
2017-08-01 Olivier Hainque <hainque@adacore.com>
* config/t-vxworks (LIBGCC2_INCLUDES): Start with -I. after -nostdinc.
extra_parts="$extra_parts crti.o crtn.o"
extra_parts="$extra_parts crttls.o"
;;
-arm-wrs-vxworks)
+arm-wrs-vxworks|arm-wrs-vxworks7)
tmake_file="$tmake_file arm/t-arm arm/t-elf t-softfp-sfdf t-softfp-excl arm/t-softfp t-softfp"
extra_parts="$extra_parts crti.o crtn.o"
+ case ${host} in
+ *-*-vxworks7)
+ # Note that arm/t-bpabi will reset the LIB2ADDEH macro.
+ # This is intentional.
+ tmake_file="$tmake_file arm/t-bpabi arm/t-vxworks7"
+ tm_file="$tm_file arm/bpabi-lib.h"
+ unwind_header=config/arm/unwind-arm.h
+ ;;
+ esac
;;
arm*-*-freebsd*) # ARM FreeBSD EABI
tmake_file="${tmake_file} arm/t-arm t-fixedpoint-gnu-prefix arm/t-elf"
--- /dev/null
+LIB2ADDEH += $(srcdir)/config/arm/unwind-arm-vxworks.c
--- /dev/null
+/* Support for ARM EABI unwinding in VxWorks Downloadable Kernel Modules.
+ Copyright (C) 2017 Free Software Foundation, Inc.
+
+ This file 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.
+
+ This file 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/>. */
+
+#if defined(__vxworks) && !defined (__RTP__)
+/* Vxworks for ARM uses __gnu_Unwind_Find_exidx to retrieve the exception
+ table for downloadable kernel modules. As those modules are only partially
+ linked, the linker won't generate __exidx_start|end, but the two symbols
+ are still used in alternate paths from unwind-arm-common.inc.
+
+ As we don't rely on them, but still need the symbols, we define dummy
+ values here. */
+void *__exidx_start __attribute__((__visibility__ ("hidden")));
+void *__exidx_end __attribute__((__visibility__ ("hidden")));
+#endif
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