blob: aaf5e5a48f93167c2513a00e56155b166ee631b8 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * linux/arch/h8300/kernel/sys_h8300.c
3 *
4 * This file contains various random system calls that
5 * have a non-standard calling sequence on the H8/300
6 * platform.
7 */
8
9#include <linux/errno.h>
10#include <linux/sched.h>
11#include <linux/mm.h>
12#include <linux/smp.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070013#include <linux/sem.h>
14#include <linux/msg.h>
15#include <linux/shm.h>
16#include <linux/stat.h>
17#include <linux/syscalls.h>
18#include <linux/mman.h>
19#include <linux/file.h>
Yoshinori Sato0cd82ef2007-08-22 14:01:24 -070020#include <linux/fs.h>
Adrian Bunkcba4fbb2007-10-16 23:29:24 -070021#include <linux/ipc.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070022
23#include <asm/setup.h>
24#include <asm/uaccess.h>
25#include <asm/cachectl.h>
26#include <asm/traps.h>
Arnd Bergmannfe742902006-10-02 02:18:34 -070027#include <asm/unistd.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070028
Linus Torvalds1da177e2005-04-16 15:20:36 -070029/* sys_cacheflush -- no support. */
30asmlinkage int
31sys_cacheflush (unsigned long addr, int scope, int cache, unsigned long len)
32{
33 return -EINVAL;
34}
35
36asmlinkage int sys_getpagesize(void)
37{
38 return PAGE_SIZE;
39}
40
41#if defined(CONFIG_SYSCALL_PRINT)
42asmlinkage void syscall_print(void *dummy,...)
43{
44 struct pt_regs *regs = (struct pt_regs *) ((unsigned char *)&dummy-4);
45 printk("call %06lx:%ld 1:%08lx,2:%08lx,3:%08lx,ret:%08lx\n",
46 ((regs->pc)&0xffffff)-2,regs->orig_er0,regs->er1,regs->er2,regs->er3,regs->er0);
47}
48#endif
Arnd Bergmannfe742902006-10-02 02:18:34 -070049
50/*
51 * Do a system call from kernel instead of calling sys_execve so we
52 * end up with proper pt_regs.
53 */
David Howellsd7627462010-08-17 23:52:56 +010054int kernel_execve(const char *filename,
55 const char *const argv[],
56 const char *const envp[])
Arnd Bergmannfe742902006-10-02 02:18:34 -070057{
58 register long res __asm__("er0");
David Howells1e729102010-08-31 16:52:21 +010059 register const char *const *_c __asm__("er3") = envp;
60 register const char *const *_b __asm__("er2") = argv;
Arnd Bergmannfe742902006-10-02 02:18:34 -070061 register const char * _a __asm__("er1") = filename;
Arnd Bergmannfe742902006-10-02 02:18:34 -070062 __asm__ __volatile__ ("mov.l %1,er0\n\t"
63 "trapa #0\n\t"
64 : "=r" (res)
65 : "g" (__NR_execve),
66 "g" (_a),
67 "g" (_b),
68 "g" (_c)
69 : "cc", "memory");
70 return res;
71}
72
73