a074335a37
Mark the system call tables readonly, as they already are on native, and the 32-bit UM version was in the previous assembly version. The 32-bit version lost it due to copy and paste from the 64-bit version, which was missing the const. Cc: Jeff Dike <jdike@addtoit.com> Cc: Richard Weinberger <richard@nod.at> Link: http://lkml.kernel.org/r/tip-45db1c6176c8171d9ae6fa6d82e07d115a5950ca@git.kernel.org Signed-off-by: H. Peter Anvin <hpa@zytor.com>
57 lines
1.5 KiB
C
57 lines
1.5 KiB
C
/*
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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 <generated/user_constants.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 stub_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_rt_sigsuspend sys_rt_sigsuspend
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#define stub_sigaltstack sys_sigaltstack
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#define stub_rt_sigreturn sys_rt_sigreturn
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#define __SYSCALL_64(nr, sym, compat) extern asmlinkage void sym(void) ;
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#include <asm/syscalls_64.h>
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#undef __SYSCALL_64
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#define __SYSCALL_64(nr, sym, compat) [ nr ] = sym,
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typedef void (*sys_call_ptr_t)(void);
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extern void sys_ni_syscall(void);
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const sys_call_ptr_t sys_call_table[] __cacheline_aligned = {
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/*
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* Smells like a compiler bug -- it doesn't work
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* when the & below is removed.
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*/
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[0 ... __NR_syscall_max] = &sys_ni_syscall,
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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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