85 lines
2.2 KiB
C
85 lines
2.2 KiB
C
#include <linux/errno.h>
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#include <linux/sched.h>
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#include <linux/mm.h>
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#include <linux/smp.h>
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#include <linux/sem.h>
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#include <linux/msg.h>
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#include <linux/shm.h>
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#include <linux/stat.h>
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#include <linux/syscalls.h>
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#include <linux/mman.h>
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#include <linux/file.h>
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#include <linux/utsname.h>
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#include <linux/module.h>
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#include <linux/fs.h>
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#include <linux/ipc.h>
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#include <asm/cacheflush.h>
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#include <asm/uaccess.h>
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#include <asm/unistd.h>
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#include <asm/syscalls.h>
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/*
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* sys_pipe() is the normal C calling standard for creating
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* a pipe. It's not the way Unix traditionally does this, though.
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*/
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asmlinkage int sys_pipe(unsigned long r4, unsigned long r5,
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unsigned long r6, unsigned long r7,
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struct pt_regs __regs)
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{
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struct pt_regs *regs = RELOC_HIDE(&__regs, 0);
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int fd[2];
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int error;
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error = do_pipe_flags(fd, 0);
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if (!error) {
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regs->regs[1] = fd[1];
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return fd[0];
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}
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return error;
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}
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asmlinkage ssize_t sys_pread_wrapper(unsigned int fd, char __user *buf,
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size_t count, long dummy, loff_t pos)
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{
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return sys_pread64(fd, buf, count, pos);
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}
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asmlinkage ssize_t sys_pwrite_wrapper(unsigned int fd, const char __user *buf,
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size_t count, long dummy, loff_t pos)
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{
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return sys_pwrite64(fd, buf, count, pos);
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}
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asmlinkage int sys_fadvise64_64_wrapper(int fd, u32 offset0, u32 offset1,
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u32 len0, u32 len1, int advice)
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{
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#ifdef __LITTLE_ENDIAN__
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return sys_fadvise64_64(fd, (u64)offset1 << 32 | offset0,
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(u64)len1 << 32 | len0, advice);
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#else
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return sys_fadvise64_64(fd, (u64)offset0 << 32 | offset1,
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(u64)len0 << 32 | len1, advice);
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#endif
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}
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#if defined(CONFIG_CPU_SH2) || defined(CONFIG_CPU_SH2A)
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#define SYSCALL_ARG3 "trapa #0x23"
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#else
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#define SYSCALL_ARG3 "trapa #0x13"
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#endif
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/*
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* Do a system call from kernel instead of calling sys_execve so we
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* end up with proper pt_regs.
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*/
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int kernel_execve(const char *filename, char *const argv[], char *const envp[])
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{
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register long __sc0 __asm__ ("r3") = __NR_execve;
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register long __sc4 __asm__ ("r4") = (long) filename;
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register long __sc5 __asm__ ("r5") = (long) argv;
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register long __sc6 __asm__ ("r6") = (long) envp;
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__asm__ __volatile__ (SYSCALL_ARG3 : "=z" (__sc0)
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: "0" (__sc0), "r" (__sc4), "r" (__sc5), "r" (__sc6)
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: "memory");
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return __sc0;
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}
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