| /* |
| * io-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 <sys/types.h> |
| #include <unistd.h> |
| #include <errno.h> |
| #define IO lseek |
| #include "io.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) |
| { |
| #if HOSTED |
| gdb_parambuf_t parameters; |
| parameters[0] = (uint32_t) fd; |
| parameters[1] = (uint32_t) ((offset >> 32) & 0xffffffff); |
| parameters[2] = (uint32_t) (offset & 0xffffffff); |
| parameters[3] = __hosted_to_gdb_lseek_flags (whence); |
| __hosted (HOSTED_LSEEK, parameters); |
| errno = __hosted_from_gdb_errno (parameters[2]); |
| return ((uint64_t)parameters[0] << 32) | ((uint64_t)parameters[1]); |
| #else |
| errno = ENOSYS; |
| return -1; |
| #endif |
| } |