acrn-kernel/arch/um/kernel/tt/syscall_kern.c

47 lines
1015 B
C

/*
* Copyright (C) 2000 - 2003 Jeff Dike (jdike@addtoit.com)
* Licensed under the GPL
*/
#include "linux/types.h"
#include "linux/utime.h"
#include "linux/sys.h"
#include "linux/ptrace.h"
#include "asm/unistd.h"
#include "asm/ptrace.h"
#include "asm/uaccess.h"
#include "asm/stat.h"
#include "sysdep/syscalls.h"
#include "sysdep/sigcontext.h"
#include "kern_util.h"
#include "syscall.h"
void syscall_handler_tt(int sig, struct pt_regs *regs)
{
void *sc;
long result;
int syscall;
sc = UPT_SC(&regs->regs);
SC_START_SYSCALL(sc);
syscall = UPT_SYSCALL_NR(&regs->regs);
syscall_trace(&regs->regs, 0);
current->thread.nsyscalls++;
nsyscalls++;
if((syscall >= NR_syscalls) || (syscall < 0))
result = -ENOSYS;
else result = EXECUTE_SYSCALL(syscall, regs);
/* regs->sc may have changed while the system call ran (there may
* have been an interrupt or segfault), so it needs to be refreshed.
*/
UPT_SC(&regs->regs) = sc;
SC_SET_SYSCALL_RETURN(sc, result);
syscall_trace(&regs->regs, 1);
}