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/*
* This file contains various random system calls that
* have a non-standard calling sequence on the Linux/i386
* platform.
*/
#include <linux/errno.h>
#include <linux/sched.h>
#include <linux/mm.h>
#include <linux/fs.h>
#include <linux/smp.h>
#include <linux/sem.h>
#include <linux/msg.h>
#include <linux/shm.h>
#include <linux/stat.h>
#include <linux/syscalls.h>
#include <linux/mman.h>
#include <linux/file.h>
#include <linux/utsname.h>
#include <linux/ipc.h>
#include <linux/uaccess.h>
#include <linux/unistd.h>
#include <asm/syscalls.h>
/*
* Old cruft
*/
asmlinkage int sys_uname(struct old_utsname __user *name)
{
int err;
if (!name)
return -EFAULT;
down_read(&uts_sem);
err = copy_to_user(name, utsname(), sizeof(*name));
up_read(&uts_sem);
return err? -EFAULT:0;
}
asmlinkage int sys_olduname(struct oldold_utsname __user *name)
{
int error;
if (!name)
return -EFAULT;
if (!access_ok(VERIFY_WRITE, name, sizeof(struct oldold_utsname)))
return -EFAULT;
down_read(&uts_sem);
error = __copy_to_user(&name->sysname, &utsname()->sysname,
__OLD_UTS_LEN);
error |= __put_user(0, name->sysname + __OLD_UTS_LEN);
error |= __copy_to_user(&name->nodename, &utsname()->nodename,
__OLD_UTS_LEN);
error |= __put_user(0, name->nodename + __OLD_UTS_LEN);
error |= __copy_to_user(&name->release, &utsname()->release,
__OLD_UTS_LEN);
error |= __put_user(0, name->release + __OLD_UTS_LEN);
error |= __copy_to_user(&name->version, &utsname()->version,
__OLD_UTS_LEN);
error |= __put_user(0, name->version + __OLD_UTS_LEN);
error |= __copy_to_user(&name->machine, &utsname()->machine,
__OLD_UTS_LEN);
error |= __put_user(0, name->machine + __OLD_UTS_LEN);
up_read(&uts_sem);
error = error ? -EFAULT : 0;
return error;
}
/*
* Do a system call from kernel instead of calling sys_execve so we
* end up with proper pt_regs.
*/
int kernel_execve(const char *filename, char *const argv[], char *const envp[])
{
long __res;
asm volatile ("push %%ebx ; movl %2,%%ebx ; int $0x80 ; pop %%ebx"
: "=a" (__res)
: "0" (__NR_execve), "ri" (filename), "c" (argv), "d" (envp) : "memory");
return __res;
}
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