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#include <unistd.h>

#include <sys/mman.h>

#include <errno.h>

#include <sys/syscall.h>

#define __syscall_clobbers \

        "r9", "r10", "r11", "r12"

#define __syscall_return(type) \

        return (__sc_err & 0x10000000 ? errno = __sc_ret, __sc_ret = -1 : 0), \

               (type) __sc_ret

void * mmap(void *start, size_t length, int prot, int flags, int fd,

        off_t offset)

{

        unsigned long __sc_ret, __sc_err;

        register unsigned long __sc_0 __asm__ ("r0");

        register unsigned long __sc_3 __asm__ ("r3");

        register unsigned long __sc_4 __asm__ ("r4");

        register unsigned long __sc_5 __asm__ ("r5");

        register unsigned long __sc_6 __asm__ ("r6");

        register unsigned long __sc_7 __asm__ ("r7");

        register unsigned long __sc_8 __asm__ ("r8");

        __sc_3 = (unsigned long) start;

        __sc_4 = (unsigned long) length;

        __sc_5 = (unsigned long) prot;

        __sc_6 = (unsigned long) flags;

        __sc_7 = (unsigned long) fd;

        __sc_8 = (unsigned long) offset;

        __sc_0 = __NR_mmap;

        __asm__ __volatile__

                ("sc            \n\t"

                 "mfcr %1       "

                : "=&r" (__sc_3), "=&r" (__sc_0)

                : "0"   (__sc_3), "1"   (__sc_0),

                  "r"   (__sc_4),

                  "r"   (__sc_5),

                  "r"   (__sc_6),

                  "r"   (__sc_7),

                  "r"   (__sc_8)

                : __syscall_clobbers);

        __sc_ret = __sc_3;

        __sc_err = __sc_0;

        __syscall_return (void *);

}