From: Sven Schnelle <svens@linux.ibm.com>
To: Willy Tarreau <w@1wt.eu>,
"Paul E . McKenney" <paulmck@kernel.org>,
Josh Triplett <josh@joshtriplett.org>
Cc: Steven Rostedt <rostedt@goodmis.org>,
Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
Lai Jiangshan <jiangshanlai@gmail.com>,
linux-kernel@vger.kernel.org, linux-s390@vger.kernel.org
Subject: [PATCH v2 1/5] nolibc: fix fd_set type
Date: Mon, 2 Jan 2023 11:51:08 +0100 [thread overview]
Message-ID: <20230102105112.1661651-2-svens@linux.ibm.com> (raw)
In-Reply-To: <20230102105112.1661651-1-svens@linux.ibm.com>
The kernel uses unsigned long for the fd_set bitmap,
but nolibc use u32. This works fine on little endian
machines, but fails on big endian. Convert to unsigned
long to fix this.
Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
---
tools/include/nolibc/types.h | 53 ++++++++++++++++++++----------------
1 file changed, 30 insertions(+), 23 deletions(-)
diff --git a/tools/include/nolibc/types.h b/tools/include/nolibc/types.h
index 959997034e55..300e0ff1cd58 100644
--- a/tools/include/nolibc/types.h
+++ b/tools/include/nolibc/types.h
@@ -89,39 +89,46 @@
#define EXIT_SUCCESS 0
#define EXIT_FAILURE 1
+#define FD_SETIDXMASK (8 * sizeof(unsigned long))
+#define FD_SETBITMASK (8 * sizeof(unsigned long)-1)
+
/* for select() */
typedef struct {
- uint32_t fd32[(FD_SETSIZE + 31) / 32];
+ unsigned long fds[(FD_SETSIZE + FD_SETBITMASK) / FD_SETIDXMASK];
} fd_set;
-#define FD_CLR(fd, set) do { \
- fd_set *__set = (set); \
- int __fd = (fd); \
- if (__fd >= 0) \
- __set->fd32[__fd / 32] &= ~(1U << (__fd & 31)); \
+#define FD_CLR(fd, set) do { \
+ fd_set *__set = (set); \
+ int __fd = (fd); \
+ if (__fd >= 0) \
+ __set->fds[__fd / FD_SETIDXMASK] &= \
+ ~(1U << (__fd & FX_SETBITMASK)); \
} while (0)
-#define FD_SET(fd, set) do { \
- fd_set *__set = (set); \
- int __fd = (fd); \
- if (__fd >= 0) \
- __set->fd32[__fd / 32] |= 1U << (__fd & 31); \
+#define FD_SET(fd, set) do { \
+ fd_set *__set = (set); \
+ int __fd = (fd); \
+ if (__fd >= 0) \
+ __set->fds[__fd / FD_SETIDXMASK] |= \
+ 1 << (__fd & FD_SETBITMASK); \
} while (0)
-#define FD_ISSET(fd, set) ({ \
- fd_set *__set = (set); \
- int __fd = (fd); \
- int __r = 0; \
- if (__fd >= 0) \
- __r = !!(__set->fd32[__fd / 32] & 1U << (__fd & 31)); \
- __r; \
+#define FD_ISSET(fd, set) ({ \
+ fd_set *__set = (set); \
+ int __fd = (fd); \
+ int __r = 0; \
+ if (__fd >= 0) \
+ __r = !!(__set->fds[__fd / FD_SETIDXMASK] & \
+1U << (__fd & FD_SET_BITMASK)); \
+ __r; \
})
-#define FD_ZERO(set) do { \
- fd_set *__set = (set); \
- int __idx; \
- for (__idx = 0; __idx < (FD_SETSIZE+31) / 32; __idx ++) \
- __set->fd32[__idx] = 0; \
+#define FD_ZERO(set) do { \
+ fd_set *__set = (set); \
+ int __idx; \
+ int __size = (FD_SETSIZE+FD_SETBITMASK) / FD_SETIDXMASK;\
+ for (__idx = 0; __idx < __size; __idx++) \
+ __set->fds[__idx] = 0; \
} while (0)
/* for poll() */
--
2.34.1
next prev parent reply other threads:[~2023-01-02 10:52 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-01-02 10:51 [PATCH v2 0/5] add s390 support to nolibc and rcutorture Sven Schnelle
2023-01-02 10:51 ` Sven Schnelle [this message]
2023-01-02 10:51 ` [PATCH v2 2/5] nolibc: add support for s390 Sven Schnelle
2023-01-02 10:51 ` [PATCH v2 3/5] selftests/nolibc: add s390 support Sven Schnelle
2023-01-02 10:51 ` [PATCH v2 4/5] rcutorture: add support for s390 Sven Schnelle
2023-01-02 10:51 ` [PATCH v2 5/5] rcutorture: build initrd for rcutorture with nolibc Sven Schnelle
2023-01-02 11:02 ` [PATCH v2 0/5] add s390 support to nolibc and rcutorture Willy Tarreau
2023-01-02 14:19 ` Sven Schnelle
2023-01-02 14:33 ` Willy Tarreau
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