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* libc/csu: Pass HWCAP flags to ifunc resolver functionsSarah Walker2026-01-131-3/+28
| | | | | | | | | | Function arguments are based on Section 9.4.1 "GNU C Library IFUNC interface" from "System V ABI for the Arm 64-bit Architecture (AArch64)", 2025Q1. (https://github.com/ARM-software/abi-aa/releases/download/2025Q1/sysvabi64.pdf) Reviewed by: andrew Sponsored by: Arm Ltd Differential Revision: https://reviews.freebsd.org/D54599
* lib: remove powerpcspeMinsoo Choo2026-01-091-3/+0
| | | | | | | Signed-off-by: Minsoo Choo <minsoochoo0122@proton.me> Reviewed by: emaste Pull Request: https://github.com/freebsd/freebsd-src/pull/1914 (cherry picked from commit 907cf3e4378f9d114af41d05a59ef4a075d3efb0)
* csu: C standard requires errno on main() entryKonstantin Belousov2025-06-241-0/+9
| | | | | | | | | Reported by: Greg Becker <greg.becker@klarasystems.com> Reviewed by: emaste, kevans, markj Sponsored by: The FreeBSD Foundation MFC after: 1 week Also see: https://reviews.freebsd.org/D50998 Differential revision: https://reviews.freebsd.org/D50997
* libc/csu: Unify INIT_RELOCS across architecturesJessica Clarke2024-10-1814-42/+43
| | | | | | | | | | | | | | | | Some architectures don't need any arguments, whilst others need auxargs, which they get by passing in env thanks to INIT_RELOCS referencing the local variable in __libc_start1(_gcrt) by name. This is unnecessarily confusing, fragile (one has to look at INIT_IRELOCS's definition to see that it uses env) and duplicates code between architectures. Instead, implement it more like rtld-elf. Each architecture provides an ifunc_init that takes the auxargs directly, and those that don't need it can just ignore it. Reviewed by: kib MFC after: 1 month Differential Revision: https://reviews.freebsd.org/D47188
* libc/csu: Support IFUNCs on riscvJessica Clarke2024-10-182-2/+65
| | | | | | | | When adding support to rtld-elf I neglected the fact that static binaries can have IFUNCs. Add support for this too. Fixes: 729d2b16b74f ("rtld-elf: Support IFUNCs on riscv") MFC after: 1 week
* libc: Purge unneeded cdefs.hWarner Losh2023-11-014-4/+0
| | | | | | | | | These sys/cdefs.h are not needed. Purge them. They are mostly left-over from the $FreeBSD$ removal. A few in libc are still required for macros that cdefs.h defines. Keep those. Sponsored by: Netflix Differential Revision: https://reviews.freebsd.org/D42385
* Remove $FreeBSD$: one-line .c patternWarner Losh2023-08-164-8/+0
| | | | Remove /^[\s*]*__FBSDID\("\$FreeBSD\$"\);?\s*\n/
* libc/csu: Do not compile the finalizer() for PIC buildDmitry Chagin2023-07-221-0/+2
| | | | | Reviewed by: kib Differential Revision: https://reviews.freebsd.org/D41148
* lib/csu: do not compile the body of handle_static_init() for PIC build at allKonstantin Belousov2023-03-121-0/+2
| | | | | | | | | | | The referenced symbols that provide init array boundaries are weak, hidden, and undefined. The code that iterates over that arrays is not used for the case when libc is compiled as dso. This should fix linking with ld.bfd. Sponsored by: The FreeBSD Foundation MFC after: 3 weeks
* libc/csu: add powerpcspeKonstantin Belousov2023-03-121-0/+4
| | | | | | Reported and tested by: alfredo Sponsored by: The FreeBSD Foundation MFC after: 3 weeks
* libc/csu: rename ignore_init.c to libc_start1.cKonstantin Belousov2023-03-112-1/+1
| | | | | | | | | | The current name was a historical curiosity that started when init array support was added, and then the file appeared a convenient place for the addition of the MI common code to csu. It is now referenced by name in single place and the rename is easy, so do it. Sponsored by: The FreeBSD Foundation MFC after: 3 weeks
* libc: move declaration of 'char **environ' to common private headerKonstantin Belousov2023-03-111-2/+0
| | | | | | | | | Suggested by: imp Reviewed by: markj Tested by: markj (aarch64) Sponsored by: The FreeBSD Foundation MFC after: 3 weeks Differential revision: https://reviews.freebsd.org/D37220
* x86: microoptimize static PIE startupKonstantin Belousov2023-03-114-10/+22
| | | | | | | | | | Do not call CPUID on each ireloc, instead call it once and cache results, similar to how it is done on powerpc64. Reviewed by: markj Sponsored by: The FreeBSD Foundation MFC after: 3 weeks Differential revision: https://reviews.freebsd.org/D37220
* csu: move common code to libcKonstantin Belousov2023-03-1114-0/+489
Why? Most trivial point, it shaves around 600 bytes from the dynamic binaries on amd64. Less trivial, the removed code is no longer part of the ABI, and we can ship updates to it with libc updates. Right now most of the csu is linked into the binaries and require us to do somewhat tricky ABI compat when it needs to change. For instance, the init_array change would be much simpler and does not require note tagging if we have init calling code in libc. This could be improved more, by splitting dynamic and static initialization. For instance, &_DYNAMIC tests can be removed then. Such change, nonetheless, would require building libc three times. I left this for later, after this change stabilizes, if ever. Reviewed by: markj Discussed with: jrtc27 (some objections, see the review), imp Tested by: markj (aarch64) Sponsored by: The FreeBSD Foundation MFC after: 3 weeks Differential revision: https://reviews.freebsd.org/D37220
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