| Message ID | 20180713161136.29104-1-christophe.lyon@st.com |
|---|---|
| Headers | show |
| Series | FDPIC ABI for ARM | expand |
Ping? On 13/07/2018 18:10, christophe.lyon@st.com wrote: > From: Christophe Lyon <christophe.lyon@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 >
Ping? Le mer. 1 août 2018 à 10:03, Christophe Lyon <christophe.lyon@st.com> a écrit : > Ping? > > > On 13/07/2018 18:10, christophe.lyon@st.com wrote: > > From: Christophe Lyon <christophe.lyon@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 > > > >
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.lyon@linaro.org> wrote: > > Ping? > > Le mer. 1 août 2018 à 10:03, Christophe Lyon <christophe.lyon@st.com> a écrit : >> >> Ping? >> >> >> On 13/07/2018 18:10, christophe.lyon@st.com wrote: >> > From: Christophe Lyon <christophe.lyon@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 >> > >>
From: Christophe Lyon <christophe.lyon@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 -- 2.6.3