tools/nolibc: arm: add missing my_syscall6

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/bf3e07c1-75f5-425b-9124-f3f2b230e63a@app.fastmail.com/
Signed-off-by: Zhangjin Wu <falcon@tinylab.org>
Reviewed-by: Thomas Weißschuh <linux@weissschuh.net>
Signed-off-by: Willy Tarreau <w@1wt.eu>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>

diff --git a/tools/include/nolibc/arch-arm.h b/tools/include/nolibc/arch-arm.h
index 45b89ffe8247c897faa4344b4255ecb2d5fd97ee..ca4c669874973e9eca010a479e60515248d43906 100644 (file)
--- 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));