6bf9adfc90
Conditional on CONFIG_GENERIC_SIGALTSTACK; architectures that do not select it are completely unaffected Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
58 lines
1.5 KiB
C
58 lines
1.5 KiB
C
/*
|
|
* System call table for UML/x86-64, copied from arch/x86/kernel/syscall_*.c
|
|
* with some changes for UML.
|
|
*/
|
|
|
|
#include <linux/linkage.h>
|
|
#include <linux/sys.h>
|
|
#include <linux/cache.h>
|
|
#include <generated/user_constants.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_sigreturn sys_rt_sigreturn
|
|
|
|
#define __SYSCALL_COMMON(nr, sym, compat) __SYSCALL_64(nr, sym, compat)
|
|
#define __SYSCALL_X32(nr, sym, compat) /* Not supported */
|
|
|
|
#define __SYSCALL_64(nr, sym, compat) extern asmlinkage void sym(void) ;
|
|
#include <asm/syscalls_64.h>
|
|
|
|
#undef __SYSCALL_64
|
|
#define __SYSCALL_64(nr, sym, compat) [ nr ] = sym,
|
|
|
|
typedef void (*sys_call_ptr_t)(void);
|
|
|
|
extern void sys_ni_syscall(void);
|
|
|
|
const sys_call_ptr_t sys_call_table[] __cacheline_aligned = {
|
|
/*
|
|
* Smells like a compiler bug -- it doesn't work
|
|
* when the & below is removed.
|
|
*/
|
|
[0 ... __NR_syscall_max] = &sys_ni_syscall,
|
|
#include <asm/syscalls_64.h>
|
|
};
|
|
|
|
int syscall_table_size = sizeof(sys_call_table);
|