commit af804f39cc7d3e0bed1c20c414cb43c1662c4465
author Helge Deller <deller@gmx.de> Tue Oct 25 04:34:14 2022 +0200
committer Laurent Vivier <laurent@vivier.eu> Wed Nov 02 17:17:07 2022 +0100
tree 0b531b39ee01bc216ef2b60239784f3bb01fd55d
parent dcd86148e23509fb2cedeb5ac38c20763b71141f

linux-user: Add close_range() syscall

Signed-off-by: Helge Deller <deller@gmx.de>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <Y1dLJoEDhJ2AAYDn@p100>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>

linux-user/syscall.c

diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index 8402c13..8b18adf 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -364,6 +364,13 @@
 #ifdef __NR_exit_group
 _syscall1(int,exit_group,int,error_code)
 #endif
+#if defined(__NR_close_range) && defined(TARGET_NR_close_range)
+#define __NR_sys_close_range __NR_close_range
+_syscall3(int,sys_close_range,int,first,int,last,int,flags)
+#ifndef CLOSE_RANGE_CLOEXEC
+#define CLOSE_RANGE_CLOEXEC     (1U << 2)
+#endif
+#endif
 #if defined(__NR_futex)
 _syscall6(int,sys_futex,int *,uaddr,int,op,int,val,
           const struct timespec *,timeout,int *,uaddr2,int,val3)
@@ -8756,6 +8763,18 @@
     case TARGET_NR_close:
         fd_trans_unregister(arg1);
         return get_errno(close(arg1));
+#if defined(__NR_close_range) && defined(TARGET_NR_close_range)
+    case TARGET_NR_close_range:
+        ret = get_errno(sys_close_range(arg1, arg2, arg3));
+        if (ret == 0 && !(arg3 & CLOSE_RANGE_CLOEXEC)) {
+            abi_long fd, maxfd;
+            maxfd = MIN(arg2, target_fd_max);
+            for (fd = arg1; fd < maxfd; fd++) {
+                fd_trans_unregister(fd);
+            }
+        }
+        return ret;
+#endif
 
     case TARGET_NR_brk:
         return do_brk(arg1);