62c69e89e8
SYS_pidfd_open may be undefined for old glibc, so using sys_pidfd_open()
helper defined in task_local_storage_helpers.h instead to fix potential
build failure.
And according to commit 7615d9e1780e ("arch: wire-up pidfd_open()"), the
syscall number of pidfd_open is always 434 except for alpha architure,
so update the definition of __NR_pidfd_open accordingly.
Signed-off-by: Hou Tao <houtao1@huawei.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20221011071249.3471760-1-houtao@huaweicloud.com
23 lines
425 B
C
23 lines
425 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __TASK_LOCAL_STORAGE_HELPER_H
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#define __TASK_LOCAL_STORAGE_HELPER_H
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#include <unistd.h>
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#include <sys/syscall.h>
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#include <sys/types.h>
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#ifndef __NR_pidfd_open
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#ifdef __alpha__
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#define __NR_pidfd_open 544
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#else
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#define __NR_pidfd_open 434
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#endif
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#endif
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static inline int sys_pidfd_open(pid_t pid, unsigned int flags)
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{
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return syscall(__NR_pidfd_open, pid, flags);
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}
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#endif
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