sys_h8300.c revision baed7fc9b580bd3fb8252ff1d9b36eaf1f86b670
1/* 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> 13#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> 20#include <linux/fs.h> 21#include <linux/ipc.h> 22 23#include <asm/setup.h> 24#include <asm/uaccess.h> 25#include <asm/cachectl.h> 26#include <asm/traps.h> 27#include <asm/unistd.h> 28 29/* 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 49 50/* 51 * Do a system call from kernel instead of calling sys_execve so we 52 * end up with proper pt_regs. 53 */ 54int kernel_execve(const char *filename, char *const argv[], char *const envp[]) 55{ 56 register long res __asm__("er0"); 57 register char *const *_c __asm__("er3") = envp; 58 register char *const *_b __asm__("er2") = argv; 59 register const char * _a __asm__("er1") = filename; 60 __asm__ __volatile__ ("mov.l %1,er0\n\t" 61 "trapa #0\n\t" 62 : "=r" (res) 63 : "g" (__NR_execve), 64 "g" (_a), 65 "g" (_b), 66 "g" (_c) 67 : "cc", "memory"); 68 return res; 69} 70 71 72