arch/x86/um/sys_call_table_64.c

Source file repositories/reference/linux-study-clean/arch/x86/um/sys_call_table_64.c

File Facts

System
Linux kernel
Corpus path
arch/x86/um/sys_call_table_64.c
Extension
.c
Size
1065 bytes
Lines
37
Domain
Architecture Layer
Bucket
arch/x86
Inferred role
Architecture Layer: implementation source
Status
source implementation candidate

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

Dependency Surface

Detected Declarations

Annotated Snippet

// SPDX-License-Identifier: GPL-2.0
/*
 * 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 <asm/syscall.h>

extern asmlinkage long sys_ni_syscall(unsigned long, unsigned long,
				      unsigned long, unsigned long,
				      unsigned long, unsigned long);

/*
 * 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 sys_iopl sys_ni_syscall
#define sys_ioperm sys_ni_syscall

#define __SYSCALL_NORETURN __SYSCALL

#define __SYSCALL(nr, sym) extern asmlinkage long sym(unsigned long, unsigned long, unsigned long, unsigned long, unsigned long, unsigned long);
#include <asm/syscalls_64.h>
#undef  __SYSCALL

#define __SYSCALL(nr, sym) sym,
const sys_call_ptr_t sys_call_table[] ____cacheline_aligned = {
#include <asm/syscalls_64.h>
};

int syscall_table_size = sizeof(sys_call_table);

Annotation

Implementation Notes