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linux-user: Add move_mount() syscall

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Signed-off-by: Thomas Weißschuh <thomas@t-8ch.de>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
[lv: define syscall]
Message-Id: <20230424153429.276788-1-thomas@t-8ch.de>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
This commit is contained in:
Thomas Weißschuh 2023-04-24 17:34:28 +02:00 • committed by Laurent Vivier
parent 59d1172776
commit 4b2d2753e8
1 changed files with 33 additions and 0 deletions
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33
linux-user/syscall.c
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@ -8776,6 +8776,12 @@ static int do_getdents64(abi_long dirfd, abi_long arg2, abi_long count)
_syscall2(int, pivot_root, const char *, new_root, const char *, put_old) _syscall2(int, pivot_root, const char *, new_root, const char *, put_old)
#endif #endif
#if defined(TARGET_NR_move_mount) && defined(__NR_move_mount)
#define __NR_sys_move_mount __NR_move_mount
_syscall5(int, sys_move_mount, int, __from_dfd, const char *, __from_pathname,
int, __to_dfd, const char *, __to_pathname, unsigned int, flag)
#endif
/* This is an internal helper for do_syscall so that it is easier /* This is an internal helper for do_syscall so that it is easier
* to have a single return point, so that actions, such as logging * to have a single return point, so that actions, such as logging
* of syscall results, can be performed. * of syscall results, can be performed.
@ -9169,6 +9175,33 @@ static abi_long do_syscall1(CPUArchState *cpu_env, int num, abi_long arg1,
unlock_user(p, arg1, 0); unlock_user(p, arg1, 0);
return ret; return ret;
#endif #endif
#if defined(TARGET_NR_move_mount) && defined(__NR_move_mount)
case TARGET_NR_move_mount:
{
void *p2, *p4;
if (!arg2 || !arg4) {
return -TARGET_EFAULT;
}
p2 = lock_user_string(arg2);
if (!p2) {
return -TARGET_EFAULT;
}
p4 = lock_user_string(arg4);
if (!p4) {
unlock_user(p2, arg2, 0);
return -TARGET_EFAULT;
}
ret = get_errno(sys_move_mount(arg1, p2, arg3, p4, arg5));
unlock_user(p2, arg2, 0);
unlock_user(p4, arg4, 0);
return ret;
}
#endif
#ifdef TARGET_NR_stime /* not on alpha */ #ifdef TARGET_NR_stime /* not on alpha */
case TARGET_NR_stime: case TARGET_NR_stime:
{ {