[{"id":3676510,"web_url":"http://patchwork.ozlabs.org/comment/3676510/","msgid":"","list_archive_url":null,"date":"2026-04-13T07:38:39","subject":"[uclibc-ng-devel] Re: [PATCH v1 0/3] Misc Additions for RISC-V","submitter":{"id":68677,"url":"http://patchwork.ozlabs.org/api/people/68677/","name":"Waldemar Brodkorb","email":"wbx@uclibc-ng.org"},"content":"Hi Charles,\n\nthanks, applied and pushed.\n\nBTW: Do you have any application example which uses \"green\" threads?\n\nbest regards\n Waldemar\n\nCharles Mirabile wrote,\n\n> These three patches add some features/support missing from\n> riscv64/riscv32 that I ran into while playing with uClibc-ng\n> \n> Charles Mirabile (3):\n> riscv: add defconfigs\n> riscv: add support for static pie binaries\n> riscv: add support for ucontext functions\n> \n> extra/Configs/Config.riscv32 | 1 +\n> extra/Configs/Config.riscv64 | 1 +\n> extra/Configs/defconfigs/riscv32/defconfig | 1 +\n> extra/Configs/defconfigs/riscv64/defconfig | 1 +\n> libc/sysdeps/linux/riscv32/Makefile.arch | 2 +\n> libc/sysdeps/linux/riscv32/crt1.S | 9 +-\n> libc/sysdeps/linux/riscv32/getcontext.S | 77 ++++++++++++\n> libc/sysdeps/linux/riscv32/makecontext.c | 78 ++++++++++++\n> libc/sysdeps/linux/riscv32/setcontext.S | 114 +++++++++++++++++\n> libc/sysdeps/linux/riscv32/swapcontext.S | 125 +++++++++++++++++++\n> libc/sysdeps/linux/riscv32/ucontext-macros.h | 49 ++++++++\n> libc/sysdeps/linux/riscv32/ucontext_i.sym | 31 +++++\n> libc/sysdeps/linux/riscv64/Makefile.arch | 2 +\n> libc/sysdeps/linux/riscv64/crt1.S | 9 +-\n> libc/sysdeps/linux/riscv64/getcontext.S | 77 ++++++++++++\n> libc/sysdeps/linux/riscv64/makecontext.c | 78 ++++++++++++\n> libc/sysdeps/linux/riscv64/setcontext.S | 114 +++++++++++++++++\n> libc/sysdeps/linux/riscv64/swapcontext.S | 125 +++++++++++++++++++\n> libc/sysdeps/linux/riscv64/ucontext-macros.h | 49 ++++++++\n> libc/sysdeps/linux/riscv64/ucontext_i.sym | 31 +++++\n> 20 files changed, 972 insertions(+), 2 deletions(-)\n> create mode 100644 extra/Configs/defconfigs/riscv32/defconfig\n> create mode 100644 extra/Configs/defconfigs/riscv64/defconfig\n> create mode 100644 libc/sysdeps/linux/riscv32/getcontext.S\n> create mode 100644 libc/sysdeps/linux/riscv32/makecontext.c\n> create mode 100644 libc/sysdeps/linux/riscv32/setcontext.S\n> create mode 100644 libc/sysdeps/linux/riscv32/swapcontext.S\n> create mode 100644 libc/sysdeps/linux/riscv32/ucontext-macros.h\n> create mode 100644 libc/sysdeps/linux/riscv32/ucontext_i.sym\n> create mode 100644 libc/sysdeps/linux/riscv64/getcontext.S\n> create mode 100644 libc/sysdeps/linux/riscv64/makecontext.c\n> create mode 100644 libc/sysdeps/linux/riscv64/setcontext.S\n> create mode 100644 libc/sysdeps/linux/riscv64/swapcontext.S\n> create mode 100644 libc/sysdeps/linux/riscv64/ucontext-macros.h\n> create mode 100644 libc/sysdeps/linux/riscv64/ucontext_i.sym\n> \n> -- \n> 2.53.0\n> \n> _______________________________________________\n> devel mailing list -- devel@uclibc-ng.org\n> To unsubscribe send an email to devel-leave@uclibc-ng.org\n>","headers":{"Return-Path":"","X-Original-To":"incoming@patchwork.ozlabs.org","Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":"legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=uclibc-ng.org\n (client-ip=89.238.66.15; helo=helium.openadk.org;\n envelope-from=devel-bounces@uclibc-ng.org; receiver=patchwork.ozlabs.org)","Received":["from helium.openadk.org (helium.openadk.org [89.238.66.15])\n\t(using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)\n\t key-exchange x25519 server-signature ECDSA (secp384r1) server-digest SHA384)\n\t(No client certificate requested)\n\tby legolas.ozlabs.org (Postfix) with ESMTPS id 4fvK6M1mcCz1yDF\n\tfor ; Mon, 13 Apr 2026 17:39:06 +1000 (AEST)","from helium.openadk.org (localhost [127.0.0.1])\n\tby helium.openadk.org (Postfix) with ESMTP id 3D1B031E0D05;\n\tMon, 13 Apr 2026 09:38:58 +0200 (CEST)","by helium.openadk.org (Postfix, from userid 1000)\n\tid 70F3031E0CBB; Mon, 13 Apr 2026 09:38:39 +0200 (CEST)"],"Date":"Mon, 13 Apr 2026 09:38:39 +0200","From":"Waldemar Brodkorb ","To":"Charles Mirabile ","Message-ID":"","References":"<20260408053507.2640564-1-cmirabil@redhat.com>","MIME-Version":"1.0","Content-Disposition":"inline","In-Reply-To":"<20260408053507.2640564-1-cmirabil@redhat.com>","X-Operating-System":"Linux 6.12.63+deb13-amd64 x86_64","Message-ID-Hash":"BGL3Q4LHUQTQCWKYLOERCO2JNFPA5536","X-Message-ID-Hash":"BGL3Q4LHUQTQCWKYLOERCO2JNFPA5536","X-MailFrom":"wbx@uclibc-ng.org","X-Mailman-Rule-Misses":"dmarc-mitigation; no-senders; approved; loop;\n banned-address; emergency; member-moderation; nonmember-moderation;\n administrivia; implicit-dest; max-recipients; max-size; news-moderation;\n no-subject; digests; suspicious-header","CC":"devel@uclibc-ng.org","X-Mailman-Version":"3.3.10","Precedence":"list","Subject":"[uclibc-ng-devel] Re: [PATCH v1 0/3] Misc Additions for RISC-V","List-Id":"uClibc-ng Development ","Archived-At":"\n ","List-Archive":"\n ","List-Help":"","List-Owner":"","List-Post":"","List-Subscribe":"","List-Unsubscribe":"","Content-Type":"text/plain; charset=\"us-ascii\"","Content-Transfer-Encoding":"7bit"}},{"id":3676789,"web_url":"http://patchwork.ozlabs.org/comment/3676789/","msgid":"","list_archive_url":null,"date":"2026-04-13T14:19:57","subject":"[uclibc-ng-devel] Re: [PATCH v1 0/3] Misc Additions for RISC-V","submitter":{"id":82370,"url":"http://patchwork.ozlabs.org/api/people/82370/","name":"Charles Mirabile","email":"cmirabil@redhat.com"},"content":"Hi Waldemar—\n\nOn Mon, Apr 13, 2026 at 3:38 AM Waldemar Brodkorb wrote:\n>\n> Hi Charles,\n>\n> thanks, applied and pushed.\n>\n> BTW: Do you have any application example which uses \"green\" threads?\n\nThey are like a more powerful setjmp/longjmp; OpenSSL uses them for\nasync crypto on some platforms / compilers (though it can fall back to\nsetjmp/longjmp from what I see\nhttps://grep.app/search?f.repo=openssl%2Fopenssl&q=USE_SWAPCONTEXT). I\nwill also attach a small example program that demos the functionality,\nwhere two functions containing loops swap back and forth to interleave\ntheir output.\n\nI became interested in these functions because I want to teach\nstudents about execution contexts / threading and it was nice to have\na demo that runs fully in userspace that is a bit easy to single step\nthrough with a debugger.\n\n>\n> best regards\n> Waldemar\n\nBest—Charlie\n\n>\n> Charles Mirabile wrote,\n>\n> > These three patches add some features/support missing from\n> > riscv64/riscv32 that I ran into while playing with uClibc-ng\n> >\n> > Charles Mirabile (3):\n> > riscv: add defconfigs\n> > riscv: add support for static pie binaries\n> > riscv: add support for ucontext functions\n> >\n> > extra/Configs/Config.riscv32 | 1 +\n> > extra/Configs/Config.riscv64 | 1 +\n> > extra/Configs/defconfigs/riscv32/defconfig | 1 +\n> > extra/Configs/defconfigs/riscv64/defconfig | 1 +\n> > libc/sysdeps/linux/riscv32/Makefile.arch | 2 +\n> > libc/sysdeps/linux/riscv32/crt1.S | 9 +-\n> > libc/sysdeps/linux/riscv32/getcontext.S | 77 ++++++++++++\n> > libc/sysdeps/linux/riscv32/makecontext.c | 78 ++++++++++++\n> > libc/sysdeps/linux/riscv32/setcontext.S | 114 +++++++++++++++++\n> > libc/sysdeps/linux/riscv32/swapcontext.S | 125 +++++++++++++++++++\n> > libc/sysdeps/linux/riscv32/ucontext-macros.h | 49 ++++++++\n> > libc/sysdeps/linux/riscv32/ucontext_i.sym | 31 +++++\n> > libc/sysdeps/linux/riscv64/Makefile.arch | 2 +\n> > libc/sysdeps/linux/riscv64/crt1.S | 9 +-\n> > libc/sysdeps/linux/riscv64/getcontext.S | 77 ++++++++++++\n> > libc/sysdeps/linux/riscv64/makecontext.c | 78 ++++++++++++\n> > libc/sysdeps/linux/riscv64/setcontext.S | 114 +++++++++++++++++\n> > libc/sysdeps/linux/riscv64/swapcontext.S | 125 +++++++++++++++++++\n> > libc/sysdeps/linux/riscv64/ucontext-macros.h | 49 ++++++++\n> > libc/sysdeps/linux/riscv64/ucontext_i.sym | 31 +++++\n> > 20 files changed, 972 insertions(+), 2 deletions(-)\n> > create mode 100644 extra/Configs/defconfigs/riscv32/defconfig\n> > create mode 100644 extra/Configs/defconfigs/riscv64/defconfig\n> > create mode 100644 libc/sysdeps/linux/riscv32/getcontext.S\n> > create mode 100644 libc/sysdeps/linux/riscv32/makecontext.c\n> > create mode 100644 libc/sysdeps/linux/riscv32/setcontext.S\n> > create mode 100644 libc/sysdeps/linux/riscv32/swapcontext.S\n> > create mode 100644 libc/sysdeps/linux/riscv32/ucontext-macros.h\n> > create mode 100644 libc/sysdeps/linux/riscv32/ucontext_i.sym\n> > create mode 100644 libc/sysdeps/linux/riscv64/getcontext.S\n> > create mode 100644 libc/sysdeps/linux/riscv64/makecontext.c\n> > create mode 100644 libc/sysdeps/linux/riscv64/setcontext.S\n> > create mode 100644 libc/sysdeps/linux/riscv64/swapcontext.S\n> > create mode 100644 libc/sysdeps/linux/riscv64/ucontext-macros.h\n> > create mode 100644 libc/sysdeps/linux/riscv64/ucontext_i.sym\n> >\n> > --\n> > 2.53.0\n> >\n> > _______________________________________________\n> > devel mailing list -- devel@uclibc-ng.org\n> > To unsubscribe send an email to devel-leave@uclibc-ng.org\n> >\n>","headers":{"Return-Path":"","X-Original-To":"incoming@patchwork.ozlabs.org","Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n\tdkim=fail reason=\"signature verification failed\" (1024-bit key;\n unprotected) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256\n header.s=mimecast20190719 header.b=XKz8AQ3S;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=uclibc-ng.org\n (client-ip=89.238.66.15; 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