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 > > > >