Ping?
The original thread started at: https://gcc.gnu.org/ml/gcc-patches/2018-07/msg00707.html On Fri, 17 Aug 2018 at 00:19, Christophe Lyon <christophe.l...@linaro.org> wrote: > > Ping? > > Le mer. 1 août 2018 à 10:03, Christophe Lyon <christophe.l...@st.com> a écrit > : >> >> Ping? >> >> >> On 13/07/2018 18:10, christophe.l...@st.com wrote: >> > From: Christophe Lyon <christophe.l...@linaro.org> >> > >> > Hello, >> > >> > This patch series implements the GCC contribution of the FDPIC ABI for >> > ARM targets. >> > >> > This ABI enables to run Linux on ARM MMU-less cores and supports >> > shared libraries to reduce the memory footprint. >> > >> > Without MMU, text and data segments relative distances are different >> > from one process to another, hence the need for a dedicated FDPIC >> > register holding the start address of the data segment. One of the >> > side effects is that function pointers require two words to be >> > represented: the address of the code, and the data segment start >> > address. These two words are designated as "Function Descriptor", >> > hence the "FD PIC" name. >> > >> > On ARM, the FDPIC register is r9 [1], and the target name is >> > arm-uclinuxfdpiceabi. Note that arm-uclinux exists, but uses another >> > ABI and the BFLAT file format; it does not support code sharing. >> > The -mfdpic option is enabled by default, and -mno-fdpic should be >> > used to build the Linux kernel. >> > >> > This work was developed some time ago by STMicroelectronics, and was >> > presented during Linaro Connect SFO15 (September 2015). You can watch >> > the discussion and read the slides [2]. >> > This presentation was related to the toolchain published on github [3], >> > which is based on binutils-2.22, gcc-4.7, uclibc-0.9.33.2, gdb-7.5.1 >> > and qemu-2.3.0, and for which pre-built binaries are available [3]. >> > >> > The ABI itself is described in details in [1]. >> > >> > Our Linux kernel patches have been updated and committed by Nicolas >> > Pitre (Linaro) in July 2017. They are required so that the loader is >> > able to handle this new file type. Indeed, the ELF files are tagged >> > with ELFOSABI_ARM_FDPIC. This new tag has been allocated by ARM, as >> > well as the new relocations involved. >> > >> > The binutils and QEMU patch series have been merged recently. [4][5] >> > >> > To build such a toolchain, you'd also need to use my uClibc branch[6]. >> > I have posted uclibc-ng patches for review [7] >> > >> > I am currently working on updating the patches for the remaining >> > toolchain components: uclibc and gdb. >> > >> > This series provides support for ARM v7 architecture and has been >> > tested on arm-linux-gnueabi without regression, as well as >> > arm-uclinuxfdpiceabi, using QEMU. arm-uclinuxfdpiceabi has more >> > failures than arm-linux-gnueabi, but is quite functional. >> > >> > Are the GCC patches OK for inclusion in master? >> > >> > Changes between v1 and v2: >> > - fix GNU coding style >> > - exit with an error for pre-Armv7 >> > - use ACLE __ARM_ARCH and remove dead code for pre-Armv4 >> > - remove unsupported attempts of pre-Armv7/thumb1 support >> > - add instructions in comments next to opcodes >> > - merge patches 11 and 13 >> > - fixed protected visibility handling in patch 8 >> > - merged legitimize_tls_address_fdpic and >> > legitimize_tls_address_not_fdpic as requested >> > >> > Thanks, >> > >> > Christophe. >> > >> > >> > [1] https://github.com/mickael-guene/fdpic_doc/blob/master/abi.txt >> > [2] >> > http://connect.linaro.org/resource/sfo15/sfo15-406-arm-fdpic-toolset-kernel-libraries-for-cortex-m-cortex-r-mmuless-cores/ >> > [3] https://github.com/mickael-guene/fdpic_manifest >> > [4] >> > https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;a=commit;h=f1ac0afe481e83c9a33f247b81fa7de789edc4d9 >> > [5] >> > https://git.qemu.org/?p=qemu.git;a=commit;h=e8fa72957419c11984608062c7dcb204a6003a06 >> > [6] >> > https://git.linaro.org/people/christophe.lyon/uclibc.git/log/?h=uClibc-0.9.33.2-fdpic-upstream >> > [7] https://mailman.uclibc-ng.org/pipermail/devel/2018-July/001705.html >> > >> > Christophe Lyon (21): >> > [ARM] FDPIC: Add -mfdpic option support >> > [ARM] FDPIC: Handle arm*-*-uclinuxfdpiceabi in configure scripts >> > [ARM] FDPIC: Force FDPIC related options unless -mno-fdpic is provided >> > [ARM] FDPIC: Add support for FDPIC for arm architecture >> > [ARM] FDPIC: Fix __do_global_dtors_aux and frame_dummy generation >> > [ARM] FDPIC: Add support for c++ exceptions >> > [ARM] FDPIC: Avoid saving/restoring r9 on stack since it is RO >> > [ARM] FDPIC: Ensure local/global binding for function descriptors >> > [ARM] FDPIC: Add support for taking address of nested function >> > [ARM] FDPIC: Implement TLS support. >> > [ARM] FDPIC: Add support to unwind FDPIC signal frame >> > [ARM] FDPIC: Restore r9 after we call __aeabi_read_tp >> > [ARM] FDPIC: Force LSB bit for PC in Cortex-M architecture >> > [ARM][testsuite] FDPIC: Skip unsupported tests >> > [ARM][testsuite] FDPIC: Adjust scan-assembler patterns. >> > [ARM][testsuite] FDPIC: Skip v8-m and v6-m tests that currently >> > produce an ICE >> > [ARM][testsuite] FDPIC: Skip tests that don't work in PIC mode >> > [ARM][testsuite] FDPIC: Handle *-*-uclinux* >> > [ARM][testsuite] FDPIC: Enable tests on pie_enabled targets >> > [ARM][testsuite] FDPIC: Adjust pr43698.c to avoid clash with uclibc. >> > [ARM][testsuite] FDPIC: Skip tests using architecture older than v7 >> > >> > config/futex.m4 | 2 +- >> > config/tls.m4 | 2 +- >> > gcc/config.gcc | 13 +- >> > gcc/config/arm/arm-c.c | 2 + >> > gcc/config/arm/arm-protos.h | 1 + >> > gcc/config/arm/arm.c | 507 >> > ++++++++++++++++++--- >> > gcc/config/arm/arm.h | 9 +- >> > gcc/config/arm/arm.md | 125 ++++- >> > gcc/config/arm/arm.opt | 4 + >> > gcc/config/arm/bpabi.h | 4 +- >> > gcc/config/arm/linux-eabi.h | 7 +- >> > gcc/config/arm/uclinuxfdpiceabi.h | 53 +++ >> > gcc/config/arm/unspecs.md | 1 + >> > gcc/ginclude/unwind-arm-common.h | 2 +- >> > gcc/testsuite/g++.dg/abi/forced.C | 2 +- >> > gcc/testsuite/g++.dg/abi/guard2.C | 2 +- >> > gcc/testsuite/g++.dg/cpp0x/noexcept03.C | 2 +- >> > gcc/testsuite/g++.dg/ext/cleanup-10.C | 2 +- >> > gcc/testsuite/g++.dg/ext/cleanup-11.C | 2 +- >> > gcc/testsuite/g++.dg/ext/cleanup-8.C | 2 +- >> > gcc/testsuite/g++.dg/ext/cleanup-9.C | 2 +- >> > gcc/testsuite/g++.dg/ext/sync-4.C | 2 +- >> > gcc/testsuite/g++.dg/ipa/comdat.C | 2 +- >> > gcc/testsuite/g++.dg/ipa/devirt-c-7.C | 3 +- >> > gcc/testsuite/g++.dg/ipa/ivinline-1.C | 2 +- >> > gcc/testsuite/g++.dg/ipa/ivinline-2.C | 2 +- >> > gcc/testsuite/g++.dg/ipa/ivinline-3.C | 2 +- >> > gcc/testsuite/g++.dg/ipa/ivinline-4.C | 2 +- >> > gcc/testsuite/g++.dg/ipa/ivinline-5.C | 2 +- >> > gcc/testsuite/g++.dg/ipa/ivinline-7.C | 2 +- >> > gcc/testsuite/g++.dg/ipa/ivinline-8.C | 2 +- >> > gcc/testsuite/g++.dg/ipa/ivinline-9.C | 2 +- >> > gcc/testsuite/g++.dg/other/anon5.C | 1 + >> > gcc/testsuite/g++.dg/tls/pr79288.C | 2 +- >> > gcc/testsuite/gcc.dg/20020312-2.c | 1 + >> > gcc/testsuite/gcc.dg/20041106-1.c | 2 +- >> > gcc/testsuite/gcc.dg/addr_equal-1.c | 3 +- >> > gcc/testsuite/gcc.dg/cleanup-10.c | 2 +- >> > gcc/testsuite/gcc.dg/cleanup-11.c | 2 +- >> > gcc/testsuite/gcc.dg/cleanup-8.c | 2 +- >> > gcc/testsuite/gcc.dg/cleanup-9.c | 2 +- >> > gcc/testsuite/gcc.dg/const-1.c | 2 +- >> > gcc/testsuite/gcc.dg/fdata-sections-1.c | 2 +- >> > gcc/testsuite/gcc.dg/fdata-sections-2.c | 2 +- >> > gcc/testsuite/gcc.dg/ipa/pure-const-1.c | 2 +- >> > gcc/testsuite/gcc.dg/noreturn-8.c | 2 +- >> > gcc/testsuite/gcc.dg/pr33826.c | 3 +- >> > gcc/testsuite/gcc.dg/pr39323-1.c | 2 +- >> > gcc/testsuite/gcc.dg/pr39323-2.c | 2 +- >> > gcc/testsuite/gcc.dg/pr39323-3.c | 2 +- >> > gcc/testsuite/gcc.dg/pr65780-1.c | 2 +- >> > gcc/testsuite/gcc.dg/pr65780-2.c | 2 +- >> > gcc/testsuite/gcc.dg/pr67338.c | 2 +- >> > gcc/testsuite/gcc.dg/pr78185.c | 2 +- >> > gcc/testsuite/gcc.dg/pr83100-1.c | 2 +- >> > gcc/testsuite/gcc.dg/pr83100-4.c | 2 +- >> > gcc/testsuite/gcc.dg/strlenopt-12g.c | 2 +- >> > gcc/testsuite/gcc.dg/strlenopt-14g.c | 2 +- >> > gcc/testsuite/gcc.dg/strlenopt-14gf.c | 2 +- >> > gcc/testsuite/gcc.dg/strlenopt-16g.c | 2 +- >> > gcc/testsuite/gcc.dg/strlenopt-17g.c | 2 +- >> > gcc/testsuite/gcc.dg/strlenopt-18g.c | 2 +- >> > gcc/testsuite/gcc.dg/strlenopt-1f.c | 2 +- >> > gcc/testsuite/gcc.dg/strlenopt-22g.c | 2 +- >> > gcc/testsuite/gcc.dg/strlenopt-2f.c | 2 +- >> > gcc/testsuite/gcc.dg/strlenopt-31g.c | 2 +- >> > gcc/testsuite/gcc.dg/strlenopt-33g.c | 2 +- >> > gcc/testsuite/gcc.dg/strlenopt-4g.c | 2 +- >> > gcc/testsuite/gcc.dg/strlenopt-4gf.c | 2 +- >> > gcc/testsuite/gcc.dg/strncmp-2.c | 2 +- >> > gcc/testsuite/gcc.dg/struct-ret-3.c | 2 +- >> > gcc/testsuite/gcc.dg/torture/ipa-pta-1.c | 2 +- >> > gcc/testsuite/gcc.dg/torture/pr69760.c | 2 +- >> > gcc/testsuite/gcc.dg/tree-ssa/alias-2.c | 2 +- >> > gcc/testsuite/gcc.dg/tree-ssa/ipa-split-5.c | 2 +- >> > gcc/testsuite/gcc.dg/tree-ssa/loadpre6.c | 2 +- >> > gcc/testsuite/gcc.dg/uninit-19.c | 4 +- >> > gcc/testsuite/gcc.target/arm/20051215-1.c | 1 + >> > .../gcc.target/arm/armv6-unaligned-load-ice.c | 1 + >> > .../arm/atomic-comp-swap-release-acquire-3.c | 1 + >> > gcc/testsuite/gcc.target/arm/atomic-op-acq_rel-3.c | 1 + >> > gcc/testsuite/gcc.target/arm/atomic-op-acquire-3.c | 1 + >> > gcc/testsuite/gcc.target/arm/atomic-op-char-3.c | 1 + >> > gcc/testsuite/gcc.target/arm/atomic-op-consume-3.c | 1 + >> > gcc/testsuite/gcc.target/arm/atomic-op-int-3.c | 1 + >> > gcc/testsuite/gcc.target/arm/atomic-op-relaxed-3.c | 1 + >> > gcc/testsuite/gcc.target/arm/atomic-op-release-3.c | 1 + >> > gcc/testsuite/gcc.target/arm/atomic-op-seq_cst-3.c | 1 + >> > gcc/testsuite/gcc.target/arm/atomic-op-short-3.c | 1 + >> > .../gcc.target/arm/attr-unaligned-load-ice.c | 1 + >> > gcc/testsuite/gcc.target/arm/attr_arm-err.c | 1 + >> > gcc/testsuite/gcc.target/arm/data-rel-2.c | 1 + >> > gcc/testsuite/gcc.target/arm/data-rel-3.c | 1 + >> > gcc/testsuite/gcc.target/arm/div64-unwinding.c | 2 +- >> > gcc/testsuite/gcc.target/arm/eliminate.c | 2 +- >> > gcc/testsuite/gcc.target/arm/ftest-armv4-arm.c | 1 + >> > gcc/testsuite/gcc.target/arm/ftest-armv4t-arm.c | 1 + >> > gcc/testsuite/gcc.target/arm/ftest-armv4t-thumb.c | 1 + >> > gcc/testsuite/gcc.target/arm/ftest-armv5t-arm.c | 1 + >> > gcc/testsuite/gcc.target/arm/ftest-armv5t-thumb.c | 1 + >> > gcc/testsuite/gcc.target/arm/ftest-armv5te-arm.c | 1 + >> > gcc/testsuite/gcc.target/arm/ftest-armv5te-thumb.c | 1 + >> > gcc/testsuite/gcc.target/arm/ftest-armv6-arm.c | 1 + >> > gcc/testsuite/gcc.target/arm/ftest-armv6-thumb.c | 1 + >> > gcc/testsuite/gcc.target/arm/ftest-armv6k-arm.c | 1 + >> > gcc/testsuite/gcc.target/arm/ftest-armv6k-thumb.c | 1 + >> > gcc/testsuite/gcc.target/arm/ftest-armv6m-thumb.c | 1 + >> > gcc/testsuite/gcc.target/arm/ftest-armv6t2-arm.c | 1 + >> > gcc/testsuite/gcc.target/arm/ftest-armv6t2-thumb.c | 1 + >> > gcc/testsuite/gcc.target/arm/ftest-armv6z-arm.c | 1 + >> > gcc/testsuite/gcc.target/arm/ftest-armv6z-thumb.c | 1 + >> > gcc/testsuite/gcc.target/arm/g2.c | 1 + >> > gcc/testsuite/gcc.target/arm/interrupt-1.c | 6 +- >> > gcc/testsuite/gcc.target/arm/interrupt-2.c | 6 +- >> > gcc/testsuite/gcc.target/arm/ivopts-2.c | 2 +- >> > gcc/testsuite/gcc.target/arm/ivopts-3.c | 2 +- >> > gcc/testsuite/gcc.target/arm/ivopts-4.c | 2 +- >> > gcc/testsuite/gcc.target/arm/ivopts-5.c | 2 +- >> > gcc/testsuite/gcc.target/arm/macro_defs1.c | 1 + >> > gcc/testsuite/gcc.target/arm/mmx-1.c | 1 + >> > gcc/testsuite/gcc.target/arm/pr19599.c | 1 + >> > gcc/testsuite/gcc.target/arm/pr40887.c | 1 + >> > gcc/testsuite/gcc.target/arm/pr43597.c | 2 +- >> > gcc/testsuite/gcc.target/arm/pr43698.c | 4 +- >> > gcc/testsuite/gcc.target/arm/pr43920-2.c | 2 +- >> > gcc/testsuite/gcc.target/arm/pr45701-1.c | 4 +- >> > gcc/testsuite/gcc.target/arm/pr45701-2.c | 4 +- >> > gcc/testsuite/gcc.target/arm/pr59858.c | 1 + >> > gcc/testsuite/gcc.target/arm/pr61948.c | 1 + >> > gcc/testsuite/gcc.target/arm/pr65647-2.c | 1 + >> > gcc/testsuite/gcc.target/arm/pr65647.c | 1 + >> > gcc/testsuite/gcc.target/arm/pr66912.c | 2 +- >> > gcc/testsuite/gcc.target/arm/pr70830.c | 3 +- >> > gcc/testsuite/gcc.target/arm/pr77933-1.c | 1 + >> > gcc/testsuite/gcc.target/arm/pr77933-2.c | 1 + >> > gcc/testsuite/gcc.target/arm/pr79058.c | 1 + >> > gcc/testsuite/gcc.target/arm/pr83712.c | 1 + >> > .../gcc.target/arm/pragma_arch_switch_2.c | 1 + >> > gcc/testsuite/gcc.target/arm/scd42-1.c | 1 + >> > gcc/testsuite/gcc.target/arm/scd42-2.c | 1 + >> > gcc/testsuite/gcc.target/arm/scd42-3.c | 1 + >> > gcc/testsuite/gcc.target/arm/sibcall-1.c | 1 + >> > gcc/testsuite/gcc.target/arm/stack-checking.c | 2 +- >> > gcc/testsuite/gcc.target/arm/stack-red-zone.c | 2 +- >> > gcc/testsuite/gcc.target/arm/synchronize.c | 2 +- >> > gcc/testsuite/gcc.target/arm/tail-long-call.c | 1 + >> > gcc/testsuite/gcc.target/arm/tlscall.c | 1 + >> > gcc/testsuite/gcc.target/arm/vfp-longcall-apcs.c | 1 + >> > gcc/testsuite/lib/target-supports.exp | 4 + >> > libatomic/configure | 8 +- >> > libatomic/configure.tgt | 2 +- >> > libgcc/config.host | 4 +- >> > libgcc/config/arm/linux-atomic.c | 38 ++ >> > libgcc/config/arm/unwind-arm.c | 5 + >> > libgcc/config/arm/unwind-arm.h | 26 +- >> > libgcc/crtstuff.c | 16 + >> > libgcc/unwind-arm-common.inc | 216 +++++++++ >> > libgcc/unwind-pe.h | 17 + >> > libitm/configure | 20 +- >> > libitm/configure.tgt | 2 +- >> > libsanitizer/configure.tgt | 3 + >> > libstdc++-v3/acinclude.m4 | 12 +- >> > libstdc++-v3/configure | 36 +- >> > libstdc++-v3/configure.host | 6 +- >> > libstdc++-v3/libsupc++/eh_personality.cc | 10 +- >> > libtool.m4 | 14 +- >> > 166 files changed, 1192 insertions(+), 212 deletions(-) >> > create mode 100644 gcc/config/arm/uclinuxfdpiceabi.h >> > >>
