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