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hexagon: use new system call 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.

The time32, stat64, rlimit and renameat entries in the syscall_abis_32
line are for system calls that were part of the generic ABI when
arch/hexagon got added but are no longer enabled by default for new
architectures.

As a side-effect, calling an unimplemented syscall now return -ENOSYS
rather than branching into a NULL pointer.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
This commit is contained in:
Arnd Bergmann 2024-06-20 15:36:30 +02:00
parent f840cab63e
commit 36d69c2975
6 changed files with 26 additions and 15 deletions
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2
arch/hexagon/include/asm/Kbuild
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@ -1,4 +1,6 @@
# SPDX-License-Identifier: GPL-2.0 # SPDX-License-Identifier: GPL-2.0
syscall-y += syscall_table_32.h
generic-y += extable.h generic-y += extable.h
generic-y += iomap.h generic-y += iomap.h
generic-y += kvm_para.h generic-y += kvm_para.h

10
arch/hexagon/include/asm/unistd.h Normal file
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@ -0,0 +1,10 @@
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
#define __ARCH_WANT_STAT64
#define __ARCH_WANT_SYS_CLONE
#define __ARCH_WANT_SYS_VFORK
#define __ARCH_WANT_SYS_FORK
#define __ARCH_BROKEN_SYS_CLONE3
#include <uapi/asm/unistd.h>

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

16
arch/hexagon/include/uapi/asm/unistd.h
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@ -27,17 +27,7 @@
* See also: syscalltab.c * See also: syscalltab.c
*/ */
#define sys_mmap2 sys_mmap_pgoff #include <asm/unistd_32.h>
#define __ARCH_WANT_RENAMEAT
#define __ARCH_WANT_STAT64
#define __ARCH_WANT_SET_GET_RLIMIT
#define __ARCH_WANT_SYS_EXECVE
#define __ARCH_WANT_SYS_CLONE
#define __ARCH_WANT_SYS_VFORK
#define __ARCH_WANT_SYS_FORK
#define __ARCH_WANT_TIME32_SYSCALLS
#define __ARCH_WANT_SYNC_FILE_RANGE2
#define __ARCH_BROKEN_SYS_CLONE3 #define __NR_sync_file_range2 84
#undef __NR_sync_file_range
#include <asm-generic/unistd.h>

3
arch/hexagon/kernel/Makefile.syscalls Normal file
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@ -0,0 +1,3 @@
# SPDX-License-Identifier: GPL-2.0
syscall_abis_32 += hexagon time32 stat64 rlimit renameat

8
arch/hexagon/kernel/syscalltab.c
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@ -11,8 +11,10 @@
#include <asm/syscall.h> #include <asm/syscall.h>
#undef __SYSCALL
#define __SYSCALL(nr, call) [nr] = (call), #define __SYSCALL(nr, call) [nr] = (call),
#define __SYSCALL_WITH_COMPAT(nr, native, compat) __SYSCALL(nr, native)
#define sys_mmap2 sys_mmap_pgoff
SYSCALL_DEFINE6(hexagon_fadvise64_64, int, fd, int, advice, SYSCALL_DEFINE6(hexagon_fadvise64_64, int, fd, int, advice,
SC_ARG64(offset), SC_ARG64(len)) SC_ARG64(offset), SC_ARG64(len))
@ -21,6 +23,8 @@ SYSCALL_DEFINE6(hexagon_fadvise64_64, int, fd, int, advice,
} }
#define sys_fadvise64_64 sys_hexagon_fadvise64_64 #define sys_fadvise64_64 sys_hexagon_fadvise64_64
#define sys_sync_file_range sys_sync_file_range2
void *sys_call_table[__NR_syscalls] = { void *sys_call_table[__NR_syscalls] = {
#include <asm/unistd.h> #include <asm/syscall_table_32.h>
}; };