1#include <linux/errno.h> 2#include <linux/sched.h> 3#include <linux/mm.h> 4#include <linux/smp.h> 5#include <linux/sem.h> 6#include <linux/msg.h> 7#include <linux/shm.h> 8#include <linux/stat.h> 9#include <linux/syscalls.h> 10#include <linux/mman.h> 11#include <linux/file.h> 12#include <linux/module.h> 13#include <linux/fs.h> 14#include <linux/ipc.h> 15#include <asm/cacheflush.h> 16#include <asm/uaccess.h> 17#include <asm/unistd.h> 18#include <asm/syscalls.h> 19 20/* 21 * sys_pipe() is the normal C calling standard for creating 22 * a pipe. It's not the way Unix traditionally does this, though. 23 */ 24asmlinkage int sys_sh_pipe(unsigned long r4, unsigned long r5, 25 unsigned long r6, unsigned long r7, 26 struct pt_regs __regs) 27{ 28 struct pt_regs *regs = RELOC_HIDE(&__regs, 0); 29 int fd[2]; 30 int error; 31 32 error = do_pipe_flags(fd, 0); 33 if (!error) { 34 regs->regs[1] = fd[1]; 35 return fd[0]; 36 } 37 return error; 38} 39 40asmlinkage ssize_t sys_pread_wrapper(unsigned int fd, char __user *buf, 41 size_t count, long dummy, loff_t pos) 42{ 43 return sys_pread64(fd, buf, count, pos); 44} 45 46asmlinkage ssize_t sys_pwrite_wrapper(unsigned int fd, const char __user *buf, 47 size_t count, long dummy, loff_t pos) 48{ 49 return sys_pwrite64(fd, buf, count, pos); 50} 51 52asmlinkage int sys_fadvise64_64_wrapper(int fd, u32 offset0, u32 offset1, 53 u32 len0, u32 len1, int advice) 54{ 55#ifdef __LITTLE_ENDIAN__ 56 return sys_fadvise64_64(fd, (u64)offset1 << 32 | offset0, 57 (u64)len1 << 32 | len0, advice); 58#else 59 return sys_fadvise64_64(fd, (u64)offset0 << 32 | offset1, 60 (u64)len0 << 32 | len1, advice); 61#endif 62} 63 64#if defined(CONFIG_CPU_SH2) || defined(CONFIG_CPU_SH2A) 65#define SYSCALL_ARG3 "trapa #0x23" 66#else 67#define SYSCALL_ARG3 "trapa #0x13" 68#endif 69 70/* 71 * Do a system call from kernel instead of calling sys_execve so we 72 * end up with proper pt_regs. 73 */ 74int kernel_execve(const char *filename, 75 const char *const argv[], 76 const char *const envp[]) 77{ 78 register long __sc0 __asm__ ("r3") = __NR_execve; 79 register long __sc4 __asm__ ("r4") = (long) filename; 80 register long __sc5 __asm__ ("r5") = (long) argv; 81 register long __sc6 __asm__ ("r6") = (long) envp; 82 __asm__ __volatile__ (SYSCALL_ARG3 : "=z" (__sc0) 83 : "0" (__sc0), "r" (__sc4), "r" (__sc5), "r" (__sc6) 84 : "memory"); 85 return __sc0; 86} 87