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[PATCH v4] linux-user: Add close_range() syscall
From: |
Helge Deller |
Subject: |
[PATCH v4] linux-user: Add close_range() syscall |
Date: |
Mon, 24 Oct 2022 22:43:16 +0200 |
Signed-off-by: Helge Deller <deller@gmx.de>
---
Changes:
v4: Fix check for arg2
v3: fd_trans_unregister() only called if close_range() doesn't fail
v2: consider CLOSE_RANGE_CLOEXEC flag
diff --git a/linux-user/strace.list b/linux-user/strace.list
index 3df2184580..cd995e5d56 100644
--- a/linux-user/strace.list
+++ b/linux-user/strace.list
@@ -103,6 +103,9 @@
#ifdef TARGET_NR_close
{ TARGET_NR_close, "close" , "%s(%d)", NULL, NULL },
#endif
+#ifdef TARGET_NR_close_range
+{ TARGET_NR_close_range, "close_range" , "%s(%u,%u,%u)", NULL, NULL },
+#endif
#ifdef TARGET_NR_connect
{ TARGET_NR_connect, "connect" , "%s(%d,%#x,%d)", NULL, NULL },
#endif
diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index 12195d4e99..984039f928 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -339,6 +339,13 @@ _syscall3(int,sys_syslog,int,type,char*,bufp,int,len)
#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)
@@ -8735,6 +8742,24 @@ static abi_long do_syscall1(CPUArchState *cpu_env, int
num, abi_long arg1,
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;
+ abi_long maxfd = arg2;
+
+ if ((sizeof(abi_long) == 4 && arg2 == (abi_long)0x7FFFFFFFUL) ||
+ (sizeof(abi_long) == 8 && arg2 ==
(abi_long)0x7FFFFFFFFFFFFFFFULL)) {
+ maxfd = target_fd_max;
+ }
+
+ for (fd = arg1; fd < maxfd; fd++) {
+ fd_trans_unregister(fd);
+ }
+ }
+ return ret;
+#endif
case TARGET_NR_brk:
return do_brk(arg1);
- [PATCH v4] linux-user: Add close_range() syscall,
Helge Deller <=