Linux kernel stable tree https://git.rulkc.org/pub/scm/linux/kernel/git/stable/linux.git/atom?h=master 2025-06-24T07:46:52+00:00 2025-06-24T07:46:52+00:00 Thomas Weißschuh linux@weissschuh.net 2025-06-23T21:48:34+00:00 urn:sha1:01e8a6d0c39ca0da2b7c80466f55e2959faf1522 Nolibc generally uses the kernel's architecture names. aarch64 is the only exception. Remove the special case. Nothing changes for the users. Acked-by: Willy Tarreau <w@1wt.eu> Link: https://lore.kernel.org/r/20250623-nolibc-aarch64-arm64-v1-1-a2892f1c1b27@weissschuh.net Signed-off-by: Thomas Weißschuh <linux@weissschuh.net> 2025-04-14T05:51:25+00:00 Thomas Weißschuh linux@weissschuh.net 2025-03-16T19:46:07+00:00 urn:sha1:60ccc16f530a480abfde399bf80779e5b021b3fe The stack pointer is already aligned by the kernel to a multiple of 16. See STACK_ROUND() in fs/binfmt_elf.c. The manual realignment is unnecessary, drop it. Signed-off-by: Thomas Weißschuh <linux@weissschuh.net> Acked-by: Willy Tarreau <w@1wt.eu> Link: https://lore.kernel.org/r/20250316-nolibc-sp-align-v1-1-1e1fb073ca1e@weissschuh.net 2024-08-12T20:21:00+00:00 Thomas Weißschuh linux@weissschuh.net 2024-08-07T21:51:41+00:00 urn:sha1:ef32e9b6a325d1d013b30d898b4dff94082902cd The specific attributes for the _start entrypoint are duplicated for each architecture. Deduplicate it into a dedicated #define into compiler.h. For clang compatibility, the epilogue will also need to be adapted, so move that one, too. Acked-by: Willy Tarreau <w@1wt.eu> Link: https://lore.kernel.org/r/20240807-nolibc-llvm-v2-5-c20f2f5fc7c2@weissschuh.net Signed-off-by: Thomas Weißschuh <linux@weissschuh.net> 2023-10-12T19:14:13+00:00 Thomas Weißschuh linux@weissschuh.net 2023-09-17T15:36:19+00:00 urn:sha1:eaa8c9a8b4027e4f780ebd2f6d0e91812467f312 We can automatically detect if pselect6 is needed or not from the kernel headers. This removes the need to manually specify it. Signed-off-by: Thomas Weißschuh <linux@weissschuh.net> Acked-by: Willy Tarreau <w@1wt.eu> Link: https://lore.kernel.org/r/20230917-nolibc-syscall-nr-v2-4-03863d509b9a@weissschuh.net 2023-08-23T02:40:22+00:00 Zhangjin Wu falcon@tinylab.org 2023-07-15T18:25:35+00:00 urn:sha1:ded8af47c21ccfda97d40d1eafb47238455048ab move most of the _start operations to _start_c(), include the stackprotector initialization. Signed-off-by: Zhangjin Wu <falcon@tinylab.org> Signed-off-by: Willy Tarreau <w@1wt.eu> 2023-08-23T02:40:22+00:00 Zhangjin Wu falcon@tinylab.org 2023-07-15T18:20:01+00:00 urn:sha1:af93807eaef689a4964fdec085c77c24b49a5560 The statx manpage [1] shows that it has been supported from Linux 4.11 and glibc 2.28, the Linux support can be checked for all of the architectures with this command: $ git grep -r statx v4.11 arch/ include/uapi/asm-generic/unistd.h \ | grep -E "aarch64|arm|mips|s390|x86|:include/uapi" Besides riscv and loongarch, all of the nolibc supported architectures have added sys_statx from Linux v4.11. riscv is mainlined to v4.15, loongarch is mainlined to v5.19, both of them use the generic unistd.h, so, they have added sys_statx from their first mainline versions. The current oldest stable branch is v4.14, only reserving sys_statx still preserves compatibility with all of the supported stable branches, So, let's remove the old arch related and dependent sys_stat support completely. This is friendly to the future new architecture porting. [1]: https://man7.org/linux/man-pages/man2/statx.2.html Signed-off-by: Zhangjin Wu <falcon@tinylab.org> Signed-off-by: Willy Tarreau <w@1wt.eu> 2023-08-23T02:40:22+00:00 Zhangjin Wu falcon@tinylab.org 2023-07-15T18:18:54+00:00 urn:sha1:bff60150f7c464d80d86f289c056c2ad2afb3c05 As gcc doc [1] shows: Most optimizations are completely disabled at -O0 or if an -O level is not set on the command line, even if individual optimization flags are specified. Test result [2] shows, gcc>=11.1.0 deviates from the above description, but before gcc 11.1.0, "-O0" still forcely uses frame pointer in the _start function even if the individual optimize("omit-frame-pointer") flag is specified. The frame pointer related operations will change the stack pointer (e.g. In x86_64, an extra "push %rbp" will be inserted at the beginning of _start) and make it differs from the one we expected, as a result, break the whole startup function. To fix up this issue, as suggested by Thomas, the individual "Os" and "omit-frame-pointer" optimize flags are used together on _start function to disable frame pointer completely even if the -O0 is set on the command line. [1]: https://gcc.gnu.org/onlinedocs/gcc/Optimize-Options.html [2]: https://lore.kernel.org/lkml/20230714094723.140603-1-falcon@tinylab.org/ Suggested-by: Thomas Weißschuh <linux@weissschuh.net> Link: https://lore.kernel.org/lkml/34b21ba5-7b59-4b3b-9ed6-ef9a3a5e06f7@t-8ch.de/ Fixes: 7f8548589661 ("tools/nolibc: make compiler and assembler agree on the section around _start") Signed-off-by: Zhangjin Wu <falcon@tinylab.org> Signed-off-by: Willy Tarreau <w@1wt.eu> 2023-08-23T02:40:22+00:00 Zhangjin Wu falcon@tinylab.org 2023-07-15T18:17:43+00:00 urn:sha1:20233498359a29f7b2ff4e8fbdb0a1a7c8d5744c Fix up such errors reported by scripts/checkpatch.pl: ERROR: space required after that ',' (ctx:VxV) #148: FILE: tools/include/nolibc/arch-aarch64.h:148: +void __attribute__((weak,noreturn,optimize("omit-frame-pointer"))) __no_stack_protector _start(void) ^ ERROR: space required after that ',' (ctx:VxV) #148: FILE: tools/include/nolibc/arch-aarch64.h:148: +void __attribute__((weak,noreturn,optimize("omit-frame-pointer"))) __no_stack_protector _start(void) ^ Signed-off-by: Zhangjin Wu <falcon@tinylab.org> Signed-off-by: Willy Tarreau <w@1wt.eu> 2023-08-23T02:38:02+00:00 Zhangjin Wu falcon@tinylab.org 2023-07-07T14:52:09+00:00 urn:sha1:f09f1912e4cd26949c565fbc0216e3c1b55e0fb4 replace "__asm__ volatile" with "__asm__ volatile" and insert necessary whitespace before "\" to make sure the lines are aligned. $ sed -i -e 's/__asm__ volatile ( /__asm__ volatile ( /g' tools/include/nolibc/*.h Note, arch-s390.h uses post-tab instead of post-whitespaces, must avoid insert whitespace just before the tabs: $ sed -i -e 's/__asm__ volatile (\t/__asm__ volatile (\t/g' tools/include/nolibc/arch-*.h Signed-off-by: Zhangjin Wu <falcon@tinylab.org> Signed-off-by: Willy Tarreau <w@1wt.eu> 2023-08-23T02:38:02+00:00 Zhangjin Wu falcon@tinylab.org 2023-07-07T14:50:34+00:00 urn:sha1:f134c7066c9064b4c9756dd86b2ace6b5cb89d20 More than 8 whitespaces of the code indent are replaced with "tab + whitespaces" to fix up such errors reported by scripts/checkpatch.pl: ERROR: code indent should use tabs where possible #64: FILE: tools/include/nolibc/arch-mips.h:64: +^I \$ ERROR: code indent should use tabs where possible #72: FILE: tools/include/nolibc/arch-mips.h:72: +^I "t0", "t1", "t2", "t3", "t4", "t5", "t6", "t7", "t8", "t9" \$ This command is used: $ sed -i -e '/^\t* /{s/ /\t/g}' tools/include/nolibc/arch-*.h Signed-off-by: Zhangjin Wu <falcon@tinylab.org> Signed-off-by: Willy Tarreau <w@1wt.eu>