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elf: Add CPU iteration support for future use in ld.so diagnostics

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Reviewed-by: Szabolcs Nagy <szabolcs.nagy@arm.com>
This commit is contained in:
Florian Weimer
2024-04-08 16:48:55 +02:00
parent 1f94147a79
commit 5653ccd847
3 changed files with 236 additions and 0 deletions
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46
sysdeps/unix/sysv/linux/dl-affinity.h Normal file
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/* CPU affinity handling for the dynamic linker. Linux version.
Copyright (C) 2024 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
/* See sysdeps/generic/dl-affinity.h for documentation of these interfaces. */
#ifndef DL_AFFINITY_H
#define DL_AFFINITY_H
#include <sysdep.h>
#include <stddef.h>
#include <unistd.h>
static inline int
_dl_getcpu (unsigned int *cpu, unsigned int *node)
{
return INTERNAL_SYSCALL_CALL (getcpu, cpu, node);
}
static int
_dl_getaffinity (unsigned long int *bits, size_t size)
{
return INTERNAL_SYSCALL_CALL (sched_getaffinity, /* TID */ 0, size, bits);
}
static int
_dl_setaffinity (const unsigned long int *bits, size_t size)
{
return INTERNAL_SYSCALL_CALL (sched_setaffinity, /* TID */ 0, size, bits);
}
#endif /* DL_AFFINITY_H */