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From: Zhangjin Wu <falcon@tinylab.org>
To: w@1wt.eu
Cc: arnd@arndb.de, falcon@tinylab.org, linux-kernel@vger.kernel.org,
	linux-kselftest@vger.kernel.org, linux-riscv@lists.infradead.org,
	thomas@t-8ch.de
Subject: [PATCH v2 6/7] tools/nolibc: arm: add missing my_syscall6
Date: Mon, 29 May 2023 21:07:42 +0800	[thread overview]
Message-ID: <ba91771d72f9a9dc869513155240deab196e4fd7.1685362482.git.falcon@tinylab.org> (raw)
In-Reply-To: <cover.1685362482.git.falcon@tinylab.org>

This is required by the coming removal of the oldselect and newselect
support.

pselect6/pselect6_time64 will be used unconditionally, they have 6
arguments.

Suggested-by: Arnd Bergmann <arnd@arndb.de>
Link: https://lore.kernel.org/linux-riscv/20230524182431.268908-1-falcon@tinylab.org/T/#t
Signed-off-by: Zhangjin Wu <falcon@tinylab.org>
---
 tools/include/nolibc/arch-arm.h | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/tools/include/nolibc/arch-arm.h b/tools/include/nolibc/arch-arm.h
index 45b89ffe8247..ca4c66987497 100644
--- a/tools/include/nolibc/arch-arm.h
+++ b/tools/include/nolibc/arch-arm.h
@@ -198,6 +198,29 @@ struct sys_stat_struct {
 	_arg1;                                                                \
 })
 
+#define my_syscall6(num, arg1, arg2, arg3, arg4, arg5, arg6)                  \
+({                                                                            \
+	register long _num  __asm__(_NOLIBC_SYSCALL_REG) = (num);             \
+	register long _arg1 __asm__ ("r0") = (long)(arg1);                    \
+	register long _arg2 __asm__ ("r1") = (long)(arg2);                    \
+	register long _arg3 __asm__ ("r2") = (long)(arg3);                    \
+	register long _arg4 __asm__ ("r3") = (long)(arg4);                    \
+	register long _arg5 __asm__ ("r4") = (long)(arg5);                    \
+	register long _arg6 __asm__ ("r5") = (long)(arg6);                    \
+	                                                                      \
+	__asm__  volatile (                                                   \
+		_NOLIBC_THUMB_SET_R7                                          \
+		"svc #0\n"                                                    \
+		_NOLIBC_THUMB_RESTORE_R7                                      \
+		: "=r"(_arg1), "=r" (_num)                                    \
+		: "r"(_arg1), "r"(_arg2), "r"(_arg3), "r"(_arg4), "r"(_arg5), \
+		  "r"(_arg6), "r"(_num)                                       \
+		: "memory", "cc", "lr"                                        \
+	);                                                                    \
+	_arg1;                                                                \
+})
+
+
 char **environ __attribute__((weak));
 const unsigned long *_auxv __attribute__((weak));
 
-- 
2.25.1


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  parent reply	other threads:[~2023-05-29 13:08 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-05-29 12:52 [PATCH v2 0/7] nolibc: add generic part1 of prepare for rv32 Zhangjin Wu
2023-05-29 12:54 ` [PATCH v2 1/7] selftests/nolibc: syscall_args: use generic __NR_statx Zhangjin Wu
2023-05-29 12:56 ` [PATCH v2 2/7] selftests/nolibc: allow specify extra arguments for qemu Zhangjin Wu
2023-05-29 13:00 ` [PATCH v2 3/7] selftests/nolibc: fix up compile warning with glibc on x86_64 Zhangjin Wu
2023-05-29 13:04   ` Willy Tarreau
2023-05-29 13:15     ` Zhangjin Wu
2023-05-29 13:02 ` [PATCH v2 4/7] selftests/nolibc: not include limits.h for nolibc Zhangjin Wu
2023-05-29 13:04 ` [PATCH v2 5/7] selftests/nolibc: use INT_MAX instead of __INT_MAX__ Zhangjin Wu
2023-05-29 13:07 ` Zhangjin Wu [this message]
2023-05-29 13:09 ` [PATCH v2 7/7] tools/nolibc: open: fix up compile warning for arm Zhangjin Wu

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