sys_call_table_64.c
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/*
* System call table for UML/x86-64, copied from arch/x86_64/kernel/syscall.c
* with some changes for UML.
*/
#include <linux/linkage.h>
#include <linux/sys.h>
#include <linux/cache.h>
#define __NO_STUBS
/*
* Below you can see, in terms of #define's, the differences between the x86-64
* and the UML syscall table.
*/
/* Not going to be implemented by UML, since we have no hardware. */
#define stub_iopl sys_ni_syscall
#define sys_ioperm sys_ni_syscall
/*
* The UML TLS problem. Note that x86_64 does not implement this, so the below
* is needed only for the ia32 compatibility.
*/
/* On UML we call it this way ("old" means it's not mmap2) */
#define sys_mmap old_mmap
#define stub_clone sys_clone
#define stub_fork sys_fork
#define stub_vfork sys_vfork
#define stub_execve sys_execve
#define stub_rt_sigsuspend sys_rt_sigsuspend
#define stub_sigaltstack sys_sigaltstack
#define stub_rt_sigreturn sys_rt_sigreturn
#define __SYSCALL(nr, sym) extern asmlinkage void sym(void) ;
#undef _ASM_X86_UNISTD_64_H
#include "../../x86/include/asm/unistd_64.h"
#undef __SYSCALL
#define __SYSCALL(nr, sym) [ nr ] = sym,
#undef _ASM_X86_UNISTD_64_H
typedef void (*sys_call_ptr_t)(void);
extern void sys_ni_syscall(void);
/*
* We used to have a trick here which made sure that holes in the
* x86_64 table were filled in with sys_ni_syscall, but a comment in
* unistd_64.h says that holes aren't allowed, so the trick was
* removed.
* The trick looked like this
* [0 ... UM_NR_syscall_max] = &sys_ni_syscall
* before including unistd_64.h - the later initializations overwrote
* the sys_ni_syscall filler.
*/
sys_call_ptr_t sys_call_table[] __cacheline_aligned = {
#include <asm/unistd_64.h>
};
int syscall_table_size = sizeof(sys_call_table);