From: Zhangjin Wu <falcon@tinylab.org>
To: w@1wt.eu
Cc: falcon@tinylab.org, arnd@arndb.de, linux-kernel@vger.kernel.org,
linux-kselftest@vger.kernel.org, linux-riscv@lists.infradead.org,
thomas@t-8ch.de
Subject: [PATCH v5 2/5] tools/nolibc: fix up undeclared syscall macros with #ifdef and -ENOSYS
Date: Mon, 19 Jun 2023 20:25:47 +0800 [thread overview]
Message-ID: <8c431e766a15d9e08755cd50d550de2a474e7a95.1687176996.git.falcon@tinylab.org> (raw)
In-Reply-To: <cover.1687176996.git.falcon@tinylab.org>
Compiling nolibc for rv32 got such errors:
nolibc/sysroot/riscv/include/sys.h: In function ‘sys_gettimeofday’:
nolibc/sysroot/riscv/include/sys.h:557:21: error: ‘__NR_gettimeofday’ undeclared (first use in this function); did you mean ‘sys_gettimeofday’?
557 | return my_syscall2(__NR_gettimeofday, tv, tz);
| ^~~~~~~~~~~~~~~~~
nolibc/sysroot/riscv/include/sys.h: In function ‘sys_lseek’:
nolibc/sysroot/riscv/include/sys.h:675:21: error: ‘__NR_lseek’ undeclared (first use in this function)
675 | return my_syscall3(__NR_lseek, fd, offset, whence);
| ^~~~~~~~~~
nolibc/sysroot/riscv/include/sys.h: In function ‘sys_wait4’:
nolibc/sysroot/riscv/include/sys.h:1341:21: error: ‘__NR_wait4’ undeclared (first use in this function)
1341 | return my_syscall4(__NR_wait4, pid, status, options, rusage);
If a syscall macro is not supported by a target platform, wrap it with
'#ifdef' and 'return -ENOSYS' for the '#else' branch, which lets the
other syscalls work as-is and allows developers to fix up the test
failures reported by nolibc-test one by one later.
This wraps all of the failed syscall macros with '#ifdef' and 'return
-ENOSYS' for the '#else' branch, so, all of the undeclared failures are
fixed.
Suggested-by: Arnd Bergmann <arnd@arndb.de>
Link: https://lore.kernel.org/linux-riscv/5e7d2adf-e96f-41ca-a4c6-5c87a25d4c9c@app.fastmail.com/
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Zhangjin Wu <falcon@tinylab.org>
---
tools/include/nolibc/sys.h | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/tools/include/nolibc/sys.h b/tools/include/nolibc/sys.h
index 78c86f124335..5464f93e863e 100644
--- a/tools/include/nolibc/sys.h
+++ b/tools/include/nolibc/sys.h
@@ -554,7 +554,11 @@ long getpagesize(void)
static __attribute__((unused))
int sys_gettimeofday(struct timeval *tv, struct timezone *tz)
{
+#ifdef __NR_gettimeofday
return my_syscall2(__NR_gettimeofday, tv, tz);
+#else
+ return -ENOSYS;
+#endif
}
static __attribute__((unused))
@@ -672,7 +676,11 @@ int link(const char *old, const char *new)
static __attribute__((unused))
off_t sys_lseek(int fd, off_t offset, int whence)
{
+#ifdef __NR_lseek
return my_syscall3(__NR_lseek, fd, offset, whence);
+#else
+ return -ENOSYS;
+#endif
}
static __attribute__((unused))
@@ -1338,7 +1346,11 @@ int unlink(const char *path)
static __attribute__((unused))
pid_t sys_wait4(pid_t pid, int *status, int options, struct rusage *rusage)
{
+#ifdef __NR_wait4
return my_syscall4(__NR_wait4, pid, status, options, rusage);
+#else
+ return -ENOSYS;
+#endif
}
static __attribute__((unused))
--
2.25.1
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next prev parent reply other threads:[~2023-06-19 12:27 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-06-19 12:22 [PATCH v5 0/5] nolibc: add part2 of support for rv32 Zhangjin Wu
2023-06-19 12:24 ` [PATCH v5 1/5] tools/nolibc: fix up #error compile failures with -ENOSYS Zhangjin Wu
2023-07-02 16:51 ` Willy Tarreau
2023-06-19 12:25 ` Zhangjin Wu [this message]
2023-06-19 12:27 ` [PATCH v5 3/5] selftests/nolibc: allow customize kernel specific ARCH variable Zhangjin Wu
2023-06-19 12:28 ` [PATCH v5 4/5] tools/nolibc: add kernel and nolibc specific ARCH variables Zhangjin Wu
2023-06-19 12:29 ` [PATCH v5 5/5] selftests/nolibc: riscv: customize makefile for rv32 Zhangjin Wu
2023-07-02 17:17 ` Willy Tarreau
2023-07-03 15:51 ` Zhangjin Wu
2023-07-02 17:19 ` [PATCH v5 0/5] nolibc: add part2 of support " Willy Tarreau
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