47 lines
1.5 KiB
C
47 lines
1.5 KiB
C
|
/*
|
||
|
|
* bdm-lseek.c --
|
||
|
|
*
|
||
|
|
* Copyright (c) 2006 CodeSourcery Inc
|
||
|
|
*
|
||
|
|
* The authors hereby grant permission to use, copy, modify, distribute,
|
||
|
|
* and license this software and its documentation for any purpose, provided
|
||
|
|
* that existing copyright notices are retained in all copies and that this
|
||
|
|
* notice is included verbatim in any distributions. No written agreement,
|
||
|
|
* license, or royalty fee is required for any of the authorized uses.
|
||
|
|
* Modifications to this software may be copyrighted by their authors
|
||
|
|
* and need not follow the licensing terms described here, provided that
|
||
|
|
* the new terms are clearly indicated on the first page of each file where
|
||
|
|
* they apply.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include "bdm-semihost.h"
|
||
|
|
#include "bdm-gdb.h"
|
||
|
|
#include <sys/types.h>
|
||
|
|
#include <unistd.h>
|
||
|
|
#include <errno.h>
|
||
|
|
|
||
|
|
/*
|
||
|
|
* lseek -- reposition a file descriptor
|
||
|
|
* input parameters:
|
||
|
|
* 0 : file descriptor
|
||
|
|
* 1 : high word of offset
|
||
|
|
* 2 : low word of offset
|
||
|
|
* 3 : seek flag
|
||
|
|
* output parameters:
|
||
|
|
* 0 : high word of result
|
||
|
|
* 1 : low word of result
|
||
|
|
* 2 : errno
|
||
|
|
*/
|
||
|
|
|
||
|
|
off_t lseek (int fd, off_t offset, int whence)
|
||
|
|
{
|
||
|
|
gdb_parambuf_t parameters;
|
||
|
|
parameters[0] = (uint32_t) fd;
|
||
|
|
parameters[1] = (uint32_t) ((offset >> 32) & 0xffffffff);
|
||
|
|
parameters[2] = (uint32_t) (offset & 0xffffffff);
|
||
|
|
parameters[3] = convert_to_gdb_lseek_flags (whence);
|
||
|
|
BDM_TRAP (BDM_LSEEK, (uint32_t)parameters);
|
||
|
|
errno = convert_from_gdb_errno (parameters[2]);
|
||
|
|
return ((uint64_t)parameters[0] << 32) | ((uint64_t)parameters[1]);
|
||
|
|
}
|