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csky: convert to generic syscall table

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The uapi/asm/unistd_32.h and asm/syscall_table_32.h headers can now be
generated from scripts/syscall.tbl, which makes this consistent with
the other architectures that have their own syscall.tbl.

csky has two architecture specific system calls, which I add to
the generic table.  The time32, stat64 and rlimit entries in the
syscall_abis_32 line are for system calls that were part of the generic
ABI when arch/csky got added but are no longer enabled by default for
new architectures.

Both the user visible side of asm/unistd.h and the internal syscall
table in the kernel should have the same effective contents after this.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
This commit is contained in:
Arnd Bergmann 2024-07-03 17:09:22 +02:00
parent d2a4a07190
commit f840cab63e
7 changed files with 21 additions and 12 deletions
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2
arch/csky/include/asm/Kbuild
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@ -1,4 +1,6 @@
# SPDX-License-Identifier: GPL-2.0
syscall-y := syscall_table_32.h
generic-y += asm-offsets.h
generic-y += extable.h
generic-y += kvm_para.h

3
arch/csky/include/asm/unistd.h
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@ -2,4 +2,7 @@
#include <uapi/asm/unistd.h>
#define __ARCH_WANT_STAT64
#define __ARCH_WANT_SYS_CLONE
#define NR_syscalls (__NR_syscalls)

2
arch/csky/include/uapi/asm/Kbuild
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@ -1,2 +1,4 @@
# SPDX-License-Identifier: GPL-2.0
syscall-y += unistd_32.h
generic-y += ucontext.h

14
arch/csky/include/uapi/asm/unistd.h
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@ -1,14 +1,6 @@
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
#define __ARCH_WANT_STAT64
#define __ARCH_WANT_NEW_STAT
#define __ARCH_WANT_SYS_CLONE
#define __ARCH_WANT_SET_GET_RLIMIT
#define __ARCH_WANT_TIME32_SYSCALLS
#define __ARCH_WANT_SYNC_FILE_RANGE2
#include <asm-generic/unistd.h>
#include <asm/unistd_32.h>
#define __NR_set_thread_area (__NR_arch_specific_syscall + 0)
__SYSCALL(__NR_set_thread_area, sys_set_thread_area)
#define __NR_cacheflush (__NR_arch_specific_syscall + 1)
__SYSCALL(__NR_cacheflush, sys_cacheflush)
#define __NR_sync_file_range2 84
#undef __NR_sync_file_range

4
arch/csky/kernel/Makefile.syscalls Normal file
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@ -0,0 +1,4 @@
# SPDX-License-Identifier: GPL-2.0
syscall_abis_32 += csky time32 stat64 rlimit

4
arch/csky/kernel/syscall_table.c
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@ -6,9 +6,11 @@
#undef __SYSCALL
#define __SYSCALL(nr, call)[nr] = (call),
#define __SYSCALL_WITH_COMPAT(nr, native, compat) __SYSCALL(nr, native)
#define sys_fadvise64_64 sys_csky_fadvise64_64
#define sys_sync_file_range sys_sync_file_range2
void * const sys_call_table[__NR_syscalls] __page_aligned_data = {
[0 ... __NR_syscalls - 1] = sys_ni_syscall,
#include <asm/unistd.h>
#include <asm/syscall_table_32.h>
};

4
scripts/syscall.tbl
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@ -293,6 +293,10 @@
246 arc arc_gettls sys_arc_gettls
247 arc sysfs sys_sysfs
248 arc arc_usr_cmpxchg sys_arc_usr_cmpxchg
244 csky set_thread_area sys_set_thread_area
245 csky cacheflush sys_cacheflush
260 time32 wait4 sys_wait4 compat_sys_wait4
260 64 wait4 sys_wait4
261 common prlimit64 sys_prlimit64