mirror of https://github.com/proxmox/mirror_qemu
linux-user: Implement pivot_root
Used by runc. Signed-off-by: YAMAMOTO Takashi <yamamoto@midokura.com> Reviewed-by: Laurent Vivier <laurent@vivier.eu> Message-Id: <20210531055019.10149-6-yamamoto@midokura.com> Signed-off-by: Laurent Vivier <laurent@vivier.eu>master
parent
0e88769704
commit
e10fbe8f34
|
@ -8257,6 +8257,10 @@ static int host_to_target_cpu_mask(const unsigned long *host_mask,
|
||||||
return 0;
|
return 0;
|
||||||
}
|
}
|
||||||
|
|
||||||
|
#if defined(TARGET_NR_pivot_root) && defined(__NR_pivot_root)
|
||||||
|
_syscall2(int, pivot_root, const char *, new_root, const char *, put_old)
|
||||||
|
#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.
|
||||||
|
@ -13220,6 +13224,23 @@ static abi_long do_syscall1(void *cpu_env, int num, abi_long arg1,
|
||||||
return ret;
|
return ret;
|
||||||
#endif
|
#endif
|
||||||
|
|
||||||
|
#if defined(TARGET_NR_pivot_root)
|
||||||
|
case TARGET_NR_pivot_root:
|
||||||
|
{
|
||||||
|
void *p2;
|
||||||
|
p = lock_user_string(arg1); /* new_root */
|
||||||
|
p2 = lock_user_string(arg2); /* put_old */
|
||||||
|
if (!p || !p2) {
|
||||||
|
ret = -TARGET_EFAULT;
|
||||||
|
} else {
|
||||||
|
ret = get_errno(pivot_root(p, p2));
|
||||||
|
}
|
||||||
|
unlock_user(p2, arg2, 0);
|
||||||
|
unlock_user(p, arg1, 0);
|
||||||
|
}
|
||||||
|
return ret;
|
||||||
|
#endif
|
||||||
|
|
||||||
default:
|
default:
|
||||||
qemu_log_mask(LOG_UNIMP, "Unsupported syscall: %d\n", num);
|
qemu_log_mask(LOG_UNIMP, "Unsupported syscall: %d\n", num);
|
||||||
return -TARGET_ENOSYS;
|
return -TARGET_ENOSYS;
|
||||||
|
|
Loading…
Reference in New Issue