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[Qemu-devel] [PATCH v2 020/108] linux-user: Split out mount, umount
From: |
Richard Henderson |
Subject: |
[Qemu-devel] [PATCH v2 020/108] linux-user: Split out mount, umount |
Date: |
Sat, 9 Jun 2018 17:00:52 -1000 |
Signed-off-by: Richard Henderson <address@hidden>
---
linux-user/syscall.c | 118 ++++++++++++++++++++-----------------------
1 file changed, 55 insertions(+), 63 deletions(-)
diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index 3d3983a504..844e771488 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -8158,6 +8158,42 @@ IMPL(mknodat)
return ret;
}
+IMPL(mount)
+{
+ char *p1 = NULL, *p2, *p3 = NULL;
+ abi_long ret = -TARGET_EFAULT;
+
+ if (arg1) {
+ p1 = lock_user_string(arg1);
+ if (!p1) {
+ return ret;
+ }
+ }
+ p2 = lock_user_string(arg2);
+ if (!p2) {
+ goto exit2;
+ }
+ if (arg3) {
+ p3 = lock_user_string(arg3);
+ if (!p3) {
+ goto exit3;
+ }
+ }
+
+ /* FIXME - arg5 should be locked, but it isn't clear how to do that
+ * since it's not guaranteed to be a NULL-terminated string.
+ */
+ ret = mount(p1, p2, p3, (unsigned long)arg4, arg5 ? g2h(arg5) : NULL);
+ ret = get_errno(ret);
+
+ unlock_user(p3, arg3, 0);
+ exit3:
+ unlock_user(p2, arg2, 0);
+ exit2:
+ unlock_user(p1, arg1, 0);
+ return ret;
+}
+
#ifdef CONFIG_OPEN_BY_HANDLE
IMPL(name_to_handle_at)
{
@@ -8315,6 +8351,21 @@ IMPL(time)
}
#endif
+#ifdef TARGET_NR_umount
+IMPL(umount)
+{
+ char *p = lock_user_string(arg1);
+ abi_long ret;
+
+ if (!p) {
+ return -TARGET_EFAULT;
+ }
+ ret = get_errno(umount(p));
+ unlock_user(p, arg1, 0);
+ return ret;
+}
+#endif
+
#ifdef TARGET_NR_unlink
IMPL(unlink)
{
@@ -8416,69 +8467,6 @@ static abi_long do_syscall1(void *cpu_env, unsigned num,
abi_long arg1,
void *p;
switch(num) {
- case TARGET_NR_mount:
- {
- /* need to look at the data field */
- void *p2, *p3;
-
- if (arg1) {
- p = lock_user_string(arg1);
- if (!p) {
- return -TARGET_EFAULT;
- }
- } else {
- p = NULL;
- }
-
- p2 = lock_user_string(arg2);
- if (!p2) {
- if (arg1) {
- unlock_user(p, arg1, 0);
- }
- return -TARGET_EFAULT;
- }
-
- if (arg3) {
- p3 = lock_user_string(arg3);
- if (!p3) {
- if (arg1) {
- unlock_user(p, arg1, 0);
- }
- unlock_user(p2, arg2, 0);
- return -TARGET_EFAULT;
- }
- } else {
- p3 = NULL;
- }
-
- /* FIXME - arg5 should be locked, but it isn't clear how to
- * do that since it's not guaranteed to be a NULL-terminated
- * string.
- */
- if (!arg5) {
- ret = mount(p, p2, p3, (unsigned long)arg4, NULL);
- } else {
- ret = mount(p, p2, p3, (unsigned long)arg4, g2h(arg5));
- }
- ret = get_errno(ret);
-
- if (arg1) {
- unlock_user(p, arg1, 0);
- }
- unlock_user(p2, arg2, 0);
- if (arg3) {
- unlock_user(p3, arg3, 0);
- }
- }
- return ret;
-#ifdef TARGET_NR_umount
- case TARGET_NR_umount:
- if (!(p = lock_user_string(arg1)))
- return -TARGET_EFAULT;
- ret = get_errno(umount(p));
- unlock_user(p, arg1, 0);
- return ret;
-#endif
#ifdef TARGET_NR_stime /* not on alpha */
case TARGET_NR_stime:
{
@@ -12569,6 +12557,7 @@ static impl_fn *syscall_table(unsigned num)
SYSCALL(mknod);
#endif
SYSCALL(mknodat);
+ SYSCALL(mount);
#ifdef CONFIG_OPEN_BY_HANDLE
SYSCALL(name_to_handle_at);
#endif
@@ -12583,6 +12572,9 @@ static impl_fn *syscall_table(unsigned num)
#ifdef TARGET_NR_time
SYSCALL(time);
#endif
+#ifdef TARGET_NR_umount
+ SYSCALL(umount);
+#endif
#ifdef TARGET_NR_unlink
SYSCALL(unlink);
#endif
--
2.17.1
- [Qemu-devel] [PATCH v2 003/108] linux-user: Relax single exit from "break", (continued)
- [Qemu-devel] [PATCH v2 003/108] linux-user: Relax single exit from "break", Richard Henderson, 2018/06/09
- [Qemu-devel] [PATCH v2 011/108] linux-user: Split out execve, Richard Henderson, 2018/06/09
- [Qemu-devel] [PATCH v2 012/108] linux-user: Split out open, openat, Richard Henderson, 2018/06/09
- [Qemu-devel] [PATCH v2 013/108] linux-user: Split out name_to_handle_at, Richard Henderson, 2018/06/09
- [Qemu-devel] [PATCH v2 014/108] linux-user: Split out open_to_handle_at, Richard Henderson, 2018/06/09
- [Qemu-devel] [PATCH v2 016/108] linux-user: Split out link, linkat, Richard Henderson, 2018/06/09
- [Qemu-devel] [PATCH v2 015/108] linux-user: Split out creat, fork, waitid, waitpid, Richard Henderson, 2018/06/09
- [Qemu-devel] [PATCH v2 017/108] linux-user: Split out unlink, unlinkat, Richard Henderson, 2018/06/09
- [Qemu-devel] [PATCH v2 018/108] linux-user: Split out chdir, mknod, mknodat, time, chmod, Richard Henderson, 2018/06/09
- [Qemu-devel] [PATCH v2 019/108] linux-user: Split out getpid, getxpid, lseek, Richard Henderson, 2018/06/09
- [Qemu-devel] [PATCH v2 020/108] linux-user: Split out mount, umount,
Richard Henderson <=
- [Qemu-devel] [PATCH v2 021/108] linux-user: Split out alarm, pause, stime, utime, utimes, Richard Henderson, 2018/06/09
- [Qemu-devel] [PATCH v2 022/108] linux-user: Split out access, faccessat, futimesat, kill, nice, sync, syncfs, Richard Henderson, 2018/06/09
- [Qemu-devel] [PATCH v2 023/108] linux-user: Split out rename, renameat, renameat2, Richard Henderson, 2018/06/09
- [Qemu-devel] [PATCH v2 024/108] linux-user: Split out dup, mkdir, mkdirat, rmdir, Richard Henderson, 2018/06/09
- [Qemu-devel] [PATCH v2 025/108] linux-user: Split out acct, pipe, pipe2, times, umount2, Richard Henderson, 2018/06/09
- [Qemu-devel] [PATCH v2 027/108] linux-user: Split out chroot, dup2, dup3, fcntl, setpgid, umask, Richard Henderson, 2018/06/09
- [Qemu-devel] [PATCH v2 026/108] linux-user: Split out ioctl, Richard Henderson, 2018/06/09
- [Qemu-devel] [PATCH v2 028/108] linux-user: Split out getpgrp, getppid, setsid, Richard Henderson, 2018/06/09
- [Qemu-devel] [PATCH v2 029/108] linux-user: Split out rt_sigaction, sigaction, Richard Henderson, 2018/06/09
- [Qemu-devel] [PATCH v2 030/108] linux-user: Split out rt_sigprocmask, sgetmask, sigprocmask, ssetmask, Richard Henderson, 2018/06/09
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