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Name	Size	Permission	Date
platform	[ DIR ]	drwxr-xr-x	2025-07-18 01:16
acct.h	3.22 KB	-rw-r--r--	2025-05-13 16:37
auxv.h	1.23 KB	-rw-r--r--	2025-05-13 16:37
bitypes.h	86 B	-rw-r--r--	2025-05-13 16:37
capability.h	7.06 KB	-rw-r--r--	2023-09-12 16:42
cdefs.h	25.64 KB	-rw-r--r--	2025-05-13 16:37
debugreg.h	3.49 KB	-rw-r--r--	2025-05-13 16:37
dir.h	922 B	-rw-r--r--	2025-05-13 16:37
elf.h	1 KB	-rw-r--r--	2025-05-13 16:37
epoll.h	4.31 KB	-rw-r--r--	2025-05-13 16:37
errno.h	19 B	-rw-r--r--	2025-05-13 16:37
eventfd.h	1.37 KB	-rw-r--r--	2025-05-13 16:37
fanotify.h	1.26 KB	-rw-r--r--	2025-05-13 16:37
fcntl.h	19 B	-rw-r--r--	2025-05-13 16:37
file.h	1.64 KB	-rw-r--r--	2025-05-13 16:37
fsuid.h	1.16 KB	-rw-r--r--	2025-05-13 16:37
gmon.h	6.08 KB	-rw-r--r--	2025-05-13 16:37
gmon_out.h	2.57 KB	-rw-r--r--	2025-05-13 16:37
inotify.h	3.81 KB	-rw-r--r--	2025-05-13 16:37
io.h	4.97 KB	-rw-r--r--	2025-05-13 16:37
ioctl.h	1.98 KB	-rw-r--r--	2025-05-13 16:37
ipc.h	1.43 KB	-rw-r--r--	2025-05-13 16:37
kd.h	1.09 KB	-rw-r--r--	2025-05-13 16:37
klog.h	1.18 KB	-rw-r--r--	2025-05-13 16:37
mman.h	5.42 KB	-rw-r--r--	2025-05-13 16:37
mount.h	5.57 KB	-rw-r--r--	2025-05-13 16:37
msg.h	2.56 KB	-rw-r--r--	2025-05-13 16:37
mtio.h	10.9 KB	-rw-r--r--	2025-05-13 16:37
param.h	3.08 KB	-rw-r--r--	2025-05-13 16:37
pci.h	923 B	-rw-r--r--	2025-05-13 16:37
perm.h	1.1 KB	-rw-r--r--	2025-05-13 16:37
personality.h	2.66 KB	-rw-r--r--	2025-05-13 16:37
poll.h	2.95 KB	-rw-r--r--	2025-05-13 16:37
prctl.h	1.75 KB	-rw-r--r--	2025-05-13 16:37
procfs.h	4.24 KB	-rw-r--r--	2025-05-13 16:37
profil.h	1.91 KB	-rw-r--r--	2025-05-13 16:37
psx_syscall.h	2.77 KB	-rw-r--r--	2023-09-12 16:42
ptrace.h	5.98 KB	-rw-r--r--	2025-05-13 16:37
queue.h	19.08 KB	-rw-r--r--	2025-05-13 16:37
quota.h	5.05 KB	-rw-r--r--	2025-05-13 16:37
random.h	1.44 KB	-rw-r--r--	2025-05-13 16:37
raw.h	1.15 KB	-rw-r--r--	2025-05-13 16:37
reboot.h	1.59 KB	-rw-r--r--	2025-05-13 16:37
reg.h	1.78 KB	-rw-r--r--	2025-05-13 16:37
resource.h	3.94 KB	-rw-r--r--	2025-05-13 16:37
rseq.h	6.25 KB	-rw-r--r--	2025-05-13 16:37
sdt-config.h	276 B	-rw-r--r--	2025-03-21 11:06
sdt.h	21.67 KB	-rw-r--r--	2025-03-21 11:06
select.h	4.92 KB	-rw-r--r--	2025-05-13 16:37
sem.h	2.6 KB	-rw-r--r--	2025-05-13 16:37
sendfile.h	1.76 KB	-rw-r--r--	2025-05-13 16:37
shm.h	2.08 KB	-rw-r--r--	2025-05-13 16:37
signal.h	20 B	-rw-r--r--	2025-05-13 16:37
signalfd.h	1.67 KB	-rw-r--r--	2025-05-13 16:37
single_threaded.h	1.15 KB	-rw-r--r--	2025-05-13 16:37
socket.h	12.09 KB	-rw-r--r--	2025-05-13 16:37
socketvar.h	141 B	-rw-r--r--	2025-05-13 16:37
soundcard.h	29 B	-rw-r--r--	2025-05-13 16:37
stat.h	13.41 KB	-rw-r--r--	2025-05-13 16:37
statfs.h	2.04 KB	-rw-r--r--	2025-05-13 16:37
statvfs.h	2.75 KB	-rw-r--r--	2025-05-13 16:37
swap.h	1.56 KB	-rw-r--r--	2025-05-13 16:37
syscall.h	1.23 KB	-rw-r--r--	2025-05-13 16:37
sysinfo.h	1.48 KB	-rw-r--r--	2025-05-13 16:37
syslog.h	7.6 KB	-rw-r--r--	2025-05-13 16:37
sysmacros.h	2.05 KB	-rw-r--r--	2025-05-13 16:37
termios.h	74 B	-rw-r--r--	2025-05-13 16:37
time.h	8.92 KB	-rw-r--r--	2025-05-13 16:37
timeb.h	1.13 KB	-rw-r--r--	2025-05-13 16:37
timerfd.h	2.52 KB	-rw-r--r--	2025-05-13 16:37
times.h	1.56 KB	-rw-r--r--	2025-05-13 16:37
timex.h	2.77 KB	-rw-r--r--	2025-05-13 16:37
ttychars.h	2.44 KB	-rw-r--r--	2025-05-13 16:37
ttydefaults.h	3.48 KB	-rw-r--r--	2025-05-13 16:37
types.h	5.58 KB	-rw-r--r--	2025-05-13 16:37
ucontext.h	5.71 KB	-rw-r--r--	2025-05-13 16:37
uio.h	6.64 KB	-rw-r--r--	2025-05-13 16:37
un.h	1.42 KB	-rw-r--r--	2025-05-13 16:37
unistd.h	20 B	-rw-r--r--	2025-05-13 16:37
user.h	5.09 KB	-rw-r--r--	2025-05-13 16:37
utsname.h	2.42 KB	-rw-r--r--	2025-05-13 16:37
vfs.h	161 B	-rw-r--r--	2025-05-13 16:37
vlimit.h	1.84 KB	-rw-r--r--	2025-05-13 16:37
vm86.h	1.17 KB	-rw-r--r--	2025-05-13 16:37
vt.h	22 B	-rw-r--r--	2025-05-13 16:37
wait.h	6.09 KB	-rw-r--r--	2025-05-13 16:37
xattr.h	4.17 KB	-rw-r--r--	2025-05-13 16:37

Rename

/*
 * Copyright (c) 2019 Andrew G. Morgan <morgan@kernel.org>
 *
 * This header, and the -lpsx library, provide a number of things to
 * support POSIX semantics for syscalls associated with the pthread
 * library. Linking this code is tricky and is done as follows:
 *
 *     ld ... -lpsx -lpthread --wrap=pthread_create
 * or, gcc ... -lpsx -lpthread -Wl,-wrap,pthread_create
 *
 * glibc provides a subset of this functionality natively through the
 * nptl:setxid mechanism and could implement psx_syscall() directly
 * using that style of functionality but, as of 2019-11-30, the setxid
 * mechanism is limited to 9 specific set*() syscalls that do not
 * support the syscall6 API (needed for prctl functions and the ambient
 * capabilities set for example).
 */

#ifndef _SYS_PSX_SYSCALL_H
#define _SYS_PSX_SYSCALL_H

#ifdef __cplusplus
extern "C" {
#endif

#include <pthread.h>

/*
 * psx_syscall performs the specified syscall on all psx registered
 * threads. The mechanism by which this occurs is much less efficient
 * than a standard system call on Linux, so it should only be used
 * when POSIX semantics are required to change process relevant
 * security state.
 *
 * Glibc has native support for POSIX semantics on setgroups() and the
 * 8 set*[gu]id() functions. So, there is no need to use psx_syscall()
 * for these calls. This call exists for all the other system calls
 * that need to maintain parity on all pthreads of a program.
 *
 * Some macrology is used to allow the caller to provide only as many
 * arguments as needed, thus psx_syscall() cannot be used as a
 * function pointer. For those situations, we define psx_syscall3()
 * and psx_syscall6().
 */
#define psx_syscall(syscall_nr, ...) \
    __psx_syscall(syscall_nr, __VA_ARGS__, (long int) 6, (long int) 5, \
		  (long int) 4, (long int) 3, (long int) 2, \
		  (long int) 1, (long int) 0)
long int __psx_syscall(long int syscall_nr, ...);
long int psx_syscall3(long int syscall_nr,
		      long int arg1, long int arg2, long int arg3);
long int psx_syscall6(long int syscall_nr,
		      long int arg1, long int arg2, long int arg3,
		      long int arg4, long int arg5, long int arg6);

/*
 * This function should be used by systems to obtain pointers to the
 * two syscall functions provided by the PSX library. A linkage trick
 * is to define this function as weak in a library that can optionally
 * use libpsx and then, should the caller link -lpsx, that library can
 * implicitly use these POSIX semantics syscalls. See libcap for an
 * example of this useage.
 */
void psx_load_syscalls(long int (**syscall_fn)(long int,
					       long int, long int, long int),
		       long int (**syscall6_fn)(long int,
						long int, long int, long int,
						long int, long int, long int));

#ifdef __cplusplus
}
#endif

#endif /* _SYS_PSX_SYSCALL_H */