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44fe4895f4
This is a follow-up cleanup after switching to the generic syscalltbl.sh. The old x86 specific script skipped non-existing syscalls. So, the generated syscalls_64.h, for example, had a big hole in the syscall numbers 335-423 range. That is why there exists [0 ... __NR_*_syscall_max] = &__*_sys_ni_cyscall. The new script, scripts/syscalltbl.sh automatically fills holes with __SYSCALL(<nr>, sys_ni_syscall), hence such ugly code can go away. The designated initializers, '[nr] =' are also unneeded. Also, there is no need to give __NR_*_syscall_max+1 because the array size is implied by the number of syscalls in the generated headers. Hence, there is no need to include <asm/unistd.h>, either. Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Link: https://lore.kernel.org/r/20210517073815.97426-4-masahiroy@kernel.org
50 lines
1.4 KiB
C
50 lines
1.4 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* System call table for UML/x86-64, copied from arch/x86/kernel/syscall_*.c
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* with some changes for UML.
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*/
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#include <linux/linkage.h>
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#include <linux/sys.h>
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#include <linux/cache.h>
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#include <asm/syscall.h>
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#define __NO_STUBS
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/*
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* Below you can see, in terms of #define's, the differences between the x86-64
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* and the UML syscall table.
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*/
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/* Not going to be implemented by UML, since we have no hardware. */
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#define sys_iopl sys_ni_syscall
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#define sys_ioperm sys_ni_syscall
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/*
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* The UML TLS problem. Note that x86_64 does not implement this, so the below
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* is needed only for the ia32 compatibility.
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*/
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/* On UML we call it this way ("old" means it's not mmap2) */
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#define sys_mmap old_mmap
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#define stub_clone sys_clone
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#define stub_fork sys_fork
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#define stub_vfork sys_vfork
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#define stub_execve sys_execve
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#define stub_execveat sys_execveat
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#define stub_rt_sigreturn sys_rt_sigreturn
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#define __SYSCALL(nr, sym) extern asmlinkage long sym(unsigned long, unsigned long, unsigned long, unsigned long, unsigned long, unsigned long);
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#include <asm/syscalls_64.h>
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#undef __SYSCALL
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#define __SYSCALL(nr, sym) [ nr ] = sym,
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extern asmlinkage long sys_ni_syscall(unsigned long, unsigned long, unsigned long, unsigned long, unsigned long, unsigned long);
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const sys_call_ptr_t sys_call_table[] ____cacheline_aligned = {
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#include <asm/syscalls_64.h>
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};
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int syscall_table_size = sizeof(sys_call_table);
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