xref: /openbmc/linux/arch/x86/um/sys_call_table_32.c (revision 275876e2)
1 /*
2  * System call table for UML/i386, copied from arch/x86/kernel/syscall_*.c
3  * with some changes for UML.
4  */
5 
6 #include <linux/linkage.h>
7 #include <linux/sys.h>
8 #include <linux/cache.h>
9 #include <generated/user_constants.h>
10 
11 #define __NO_STUBS
12 
13 /*
14  * Below you can see, in terms of #define's, the differences between the x86-64
15  * and the UML syscall table.
16  */
17 
18 /* Not going to be implemented by UML, since we have no hardware. */
19 #define sys_iopl sys_ni_syscall
20 #define sys_ioperm sys_ni_syscall
21 
22 #define sys_vm86old sys_ni_syscall
23 #define sys_vm86 sys_ni_syscall
24 
25 #define old_mmap sys_old_mmap
26 
27 #define __SYSCALL_I386(nr, sym, compat) extern asmlinkage void sym(void) ;
28 #include <asm/syscalls_32.h>
29 
30 #undef __SYSCALL_I386
31 #define __SYSCALL_I386(nr, sym, compat) [ nr ] = sym,
32 
33 typedef asmlinkage void (*sys_call_ptr_t)(void);
34 
35 extern asmlinkage void sys_ni_syscall(void);
36 
37 const sys_call_ptr_t sys_call_table[] __cacheline_aligned = {
38 	/*
39 	 * Smells like a compiler bug -- it doesn't work
40 	 * when the & below is removed.
41 	 */
42 	[0 ... __NR_syscall_max] = &sys_ni_syscall,
43 #include <asm/syscalls_32.h>
44 };
45 
46 int syscall_table_size = sizeof(sys_call_table);
47