Initial revision

c/src/lib/libc/README

@@ -0,0 +1,37 @@
+--
+--  $Id$
+--
+
+Overview of newlib support (newlib is from CYGNUS)
+    Each task can have its own libc state including:
+        open stdio files
+        strtok
+        multi precision arithmetic state
+        etc.
+
+    This is implemented by a reentrancy data structure for each task.
+
+    When a task is "started" (in RTEMS sense) the reentrancy structure
+    is allocated.  Its address is stored in notepad[NOTEPAD_LAST].
+
+    When task is switched to, the value of global variable _impure_ptr
+    is changed to the value of the new tasks reentrancy structure.
+
+    When a task is deleted
+        atexit() processing (for that task) happens
+        task's stdio buffers are flushed
+
+    When exit(3) is called
+        calling task's atexit processing done
+        global libc state atexit processing done
+            (this will include any atexit routines installed by drivers)
+        executive is shutdown
+            causes a context switch back to bsp land
+
+
+NOTE:
+    libc extension are installed by bsp_libc_init()
+        iff we are using clock interrupts.
+        This hack is necessary to allow the tmtests to avoid
+        timing the extensions.
+

c/src/lib/libc/__brk.c

@@ -0,0 +1,40 @@
+/*
+ *  RTEMS "Broken" __brk/__sbrk Implementation
+ *
+ *  NOTE: sbrk is BSP provided.
+ *
+ *
+ *  COPYRIGHT (c) 1989, 1990, 1991, 1992, 1993, 1994.
+ *  On-Line Applications Research Corporation (OAR).
+ *  All rights assigned to U.S. Government, 1994.
+ *
+ *  This material may be reproduced by or for the U.S. Government pursuant
+ *  to the copyright license under the clause at DFARS 252.227-7013.  This
+ *  notice must appear in all copies of this file and its derivatives.
+ *
+ *  $Id$
+ */
+
+#include <rtems.h>
+
+#include <signal.h>
+#include <errno.h>
+#include <sys/types.h>
+#ifdef RTEMS_NEWLIB
+#include <reent.h>
+#endif
+#include <unistd.h>
+
+/* we use RTEMS for memory management.  We don't need sbrk */
+
+void * __sbrk(int incr)
+{
+  errno = EINVAL;
+  return (void *)0;
+}
+
+int __brk( const void *endds )
+{
+  errno = EINVAL;
+  return -1;
+}

c/src/lib/libc/__gettod.c

@@ -0,0 +1,84 @@
+#if !defined(RTEMS_UNIX)
+/*
+ *  RTEMS gettimeofday Implementation
+ *
+ *
+ *  COPYRIGHT (c) 1989, 1990, 1991, 1992, 1993, 1994.
+ *  On-Line Applications Research Corporation (OAR).
+ *  All rights assigned to U.S. Government, 1994.
+ *
+ *  This material may be reproduced by or for the U.S. Government pursuant
+ *  to the copyright license under the clause at DFARS 252.227-7013.  This
+ *  notice must appear in all copies of this file and its derivatives.
+ *
+ *  $Id$
+ */
+
+#include <rtems.h>
+
+#ifdef RTEMS_NEWLIB
+#include <sys/reent.h>
+#endif
+#include <time.h>
+#include <sys/time.h>
+#include <errno.h>
+#include <assert.h>
+
+/*
+ *  NOTE:  The solaris gettimeofday does not have a second parameter.
+ */
+
+int gettimeofday(
+   struct timeval  *tp,
+   struct timezone *tzp
+)
+{
+  rtems_status_code      status;
+  rtems_clock_time_value time;
+
+  if ( !tp || !tzp ) {
+    errno = EFAULT;
+    return -1;
+  }
+
+  /* "POSIX" does not seem to allow for not having a TOD */
+  status = rtems_clock_get( RTEMS_CLOCK_GET_TIME_VALUE, &time );
+  if ( status != RTEMS_SUCCESSFUL ) {
+    assert( 0 );
+    return -1;
+  }
+
+  tp->tv_sec  = time.seconds;
+  tp->tv_usec = time.microseconds;
+
+#if 0
+  tzp->minuteswest = timezone / 60; /* from seconds to minutes */
+  tzp->dsttime = daylight;
+#endif
+
+  /*
+   * newlib does not have timezone and daylight savings time
+   * yet.  When it does this needs to be fixed.
+   */
+
+  tzp->tz_minuteswest = 0;  /* at UTC */
+  tzp->tz_dsttime = 0;      /* no daylight savings */
+  return 0;
+}
+
+/*
+ *  "Reentrant" versions of the above routines implemented above.
+ */
+
+#if 0
+int _gettimeofday_r(
+   struct _reent   *ignored_reentrancy_stuff,
+   struct timeval  *tp,
+   struct timezone *tzp
+)
+{
+  return gettimeofday( tp, tzp );
+}
+#endif
+
+#endif

c/src/lib/libc/__times.c

@@ -0,0 +1,65 @@
+/*
+ *  RTEMS _times Implementation
+ *
+ *
+ *  COPYRIGHT (c) 1989, 1990, 1991, 1992, 1993, 1994.
+ *  On-Line Applications Research Corporation (OAR).
+ *  All rights assigned to U.S. Government, 1994.
+ *
+ *  This material may be reproduced by or for the U.S. Government pursuant
+ *  to the copyright license under the clause at DFARS 252.227-7013.  This
+ *  notice must appear in all copies of this file and its derivatives.
+ *
+ *  $Id$
+ */
+
+#include <rtems.h>
+
+#include <sys/times.h>
+#include <time.h>
+#include <sys/time.h>
+#include <errno.h>
+#include <assert.h>
+
+clock_t _times(
+   struct tms  *ptms
+)
+{
+  rtems_status_code      status;
+  rtems_interval         ticks_since_boot;
+
+  if ( !ptms ) {
+    errno = EFAULT;
+    return -1;
+  }
+
+  /* "POSIX" does not seem to allow for not having a TOD */
+  status = rtems_clock_get(
+    RTEMS_CLOCK_GET_TICKS_SINCE_BOOT,
+    &ticks_since_boot
+  );
+  if ( status != RTEMS_SUCCESSFUL ) {
+    assert( 0 );
+    return -1;
+  }
+
+  /*
+   *  RTEMS has no notion of system versus user time and does
+   *  not (as of 3.2.0) keep track of CPU usage on a per task basis.
+   */
+
+  ptms->tms_utime  = ticks_since_boot;
+  ptms->tms_stime  = 0;
+  ptms->tms_cutime = 0;
+  ptms->tms_cstime = 0;
+
+  return 0;
+}
+
+clock_t times(
+   struct tms  *ptms
+)
+{
+  return _times( ptms );
+}
+

c/src/lib/libc/internal.h

@@ -0,0 +1,41 @@
+/*  internal.h
+ *
+ *  This include file contains internal information
+ *  for the RTEMS C library support which is needed across
+ *  files.
+ *
+ *  COPYRIGHT (c) 1989, 1990, 1991, 1992, 1993, 1994.
+ *  On-Line Applications Research Corporation (OAR).
+ *  All rights assigned to U.S. Government, 1994.
+ *
+ *  This material may be reproduced by or for the U.S. Government pursuant
+ *  to the copyright license under the clause at DFARS 252.227-7013.  This
+ *  notice must appear in all copies of this file and its derivatives.
+ *
+ *  $Id$
+ */
+
+#ifndef __INTERNAL_LIBC_h
+#define __INTERNAL_LIBC_h
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+void MY_task_set_note(
+  rtems_tcb        *tcb,
+  rtems_unsigned32 notepad,
+  rtems_unsigned32 note
+);
+
+rtems_unsigned32 MY_task_get_note(
+  rtems_tcb        *tcb,
+  rtems_unsigned32  notepad
+);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
+/* end of include file */

c/src/lib/libc/libcsupport.h

@@ -0,0 +1,47 @@
+/*  libcsupport.h
+ *
+ *  This include file contains the information regarding the
+ *  RTEMS specific support for the standard C library.
+ *
+ *  COPYRIGHT (c) 1989, 1990, 1991, 1992, 1993, 1994.
+ *  On-Line Applications Research Corporation (OAR).
+ *  All rights assigned to U.S. Government, 1994.
+ *
+ *  This material may be reproduced by or for the U.S. Government pursuant
+ *  to the copyright license under the clause at DFARS 252.227-7013.  This
+ *  notice must appear in all copies of this file and its derivatives.
+ *
+ *  $Id$
+ */
+
+#ifndef __LIBC_SUPPORT_h
+#define __LIBC_SUPPORT_h
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <sys/types.h>
+
+void RTEMS_Malloc_Initialize(
+  void   *start,
+  size_t  length,
+  size_t  sbrk_amount
+);
+
+extern void libc_init(int reentrant);
+
+#ifdef __cplusplus
+}
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
+/* end of include file */

c/src/lib/libc/malloc.c

@@ -0,0 +1,280 @@
+/*
+ *  RTEMS Malloc Family Implementation
+ *
+ *
+ *  COPYRIGHT (c) 1989, 1990, 1991, 1992, 1993, 1994.
+ *  On-Line Applications Research Corporation (OAR).
+ *  All rights assigned to U.S. Government, 1994.
+ *
+ *  This material may be reproduced by or for the U.S. Government pursuant
+ *  to the copyright license under the clause at DFARS 252.227-7013.  This
+ *  notice must appear in all copies of this file and its derivatives.
+ *
+ *  $Id$
+ */
+
+#include <rtems.h>
+#ifdef RTEMS_LIBC
+#include <memory.h>
+#endif
+#include "libcsupport.h"
+#ifdef RTEMS_NEWLIB
+#include <sys/reent.h>
+#endif
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <assert.h>
+#include <errno.h>
+#include <string.h>
+
+/* 
+ *  XXX: Do we really need to duplicate these? It appears that they
+ *       only cause typing problems.
+ */
+
+#if 0
+void *malloc(size_t);
+void *calloc(size_t, size_t);
+void *realloc(void *, size_t);
+void free(void *);
+void *sbrk(size_t);
+#endif
+
+rtems_id RTEMS_Malloc_Heap;
+size_t RTEMS_Malloc_Sbrk_amount;
+
+void RTEMS_Malloc_Initialize(
+  void   *start,
+  size_t  length,
+  size_t  sbrk_amount
+)
+{
+  rtems_status_code   status;
+  void               *starting_address;
+  rtems_unsigned32    u32_address;
+
+  /*
+   * If the starting address is 0 then we are to attempt to
+   * get length worth of memory using sbrk. Make sure we
+   * align the address that we get back.
+   */
+
+  starting_address = start;
+
+  if (!starting_address) {
+    u32_address = (unsigned int)sbrk(length);
+
+    if (u32_address == -1) {
+      rtems_fatal_error_occurred( RTEMS_NO_MEMORY );
+      /* DOES NOT RETURN!!! */
+    }
+
+    if (u32_address & (CPU_ALIGNMENT-1)) {
+      u32_address = (u32_address + CPU_ALIGNMENT) & ~(CPU_ALIGNMENT-1);
+      /* XXX: if we do any alignment .. then length should be shortened */
+    }
+
+    starting_address = (void *)u32_address;
+  }
+
+  /*
+   *  Unfortunately we cannot use assert if this fails because if this
+   *  has failed we do not have a heap and if we do not have a heap
+   *  STDIO cannot work because there will be no buffers.
+   */
+
+  status = rtems_region_create(
+    rtems_build_name( 'H', 'E', 'A', 'P' ),
+    starting_address,
+    length,
+    8,                     /* XXX : use CPU dependent RTEMS constant */
+    RTEMS_DEFAULT_ATTRIBUTES,
+    &RTEMS_Malloc_Heap
+  );
+  if ( status != RTEMS_SUCCESSFUL )
+    rtems_fatal_error_occurred( status );
+}
+
+void *malloc(
+  size_t  size
+)
+{
+  void              *return_this;
+  void              *starting_address;
+  rtems_unsigned32   the_size;
+  rtems_unsigned32   sbrk_amount;
+  rtems_status_code  status;
+
+  if ( !size )
+    return (void *) 0;
+
+  /*
+   * Try to give a segment in the current region if there is not
+   * enough space then try to grow the region using rtems_region_extend().
+   * If this fails then return a NULL pointer.
+   */
+
+  status = rtems_region_get_segment(
+    RTEMS_Malloc_Heap,
+    size,
+    RTEMS_NO_WAIT,
+    RTEMS_NO_TIMEOUT,
+    &return_this
+  );
+
+  if ( status != RTEMS_SUCCESSFUL ) {
+    /*
+     *  Round to the "requested sbrk amount" so hopefully we won't have
+     *  to grow again for a while.  This effectively does sbrk() calls
+     *  in "page" amounts.
+     */
+
+    sbrk_amount = RTEMS_Malloc_Sbrk_amount;
+
+    if ( sbrk_amount == 0 )
+      return (void *) 0;
+
+    the_size = ((size + sbrk_amount) / sbrk_amount * sbrk_amount);
+
+    if (((rtems_unsigned32)starting_address = sbrk(the_size)) == -1)
+      return (void *) 0;
+
+    /*
+    fprintf(stderr, "Extended the C heap starting at 0x%x for %d bytes\n",
+        (unsigned32)starting_address, the_size);
+     */
+
+    status = rtems_region_extend(
+      RTEMS_Malloc_Heap,
+      starting_address,
+      the_size
+    );
+    if ( status != RTEMS_SUCCESSFUL ) {
+      sbrk(-the_size);
+      return(FALSE);
+      errno = ENOMEM;
+      return (void *) 0;
+    }
+    status = rtems_region_get_segment(
+      RTEMS_Malloc_Heap,
+       size,
+       RTEMS_NO_WAIT,
+       RTEMS_NO_TIMEOUT,
+       &return_this
+    );
+    if ( status != RTEMS_SUCCESSFUL ) {
+      errno = ENOMEM;
+      return (void *) 0;
+    }
+  }
+
+  return return_this;
+}
+
+void *calloc(
+  size_t nelem,
+  size_t elsize
+)
+{
+  register char *cptr;
+  int length;
+
+  length = nelem * elsize;
+  cptr = malloc( length );
+  if ( cptr )
+    memset( cptr, '\0', length );
+
+  return cptr;
+}
+
+void *realloc(
+  void *ptr,
+  size_t size
+)
+{
+  rtems_unsigned32  old_size;
+  rtems_status_code status;
+  char *new_area;
+
+  if ( !ptr )
+    return malloc( size );
+
+  if ( !size ) {
+    free( ptr );
+    return (void *) 0;
+  }
+
+  status = rtems_region_get_segment_size( RTEMS_Malloc_Heap, ptr, &old_size );
+  if ( status != RTEMS_SUCCESSFUL ) {
+    errno = EINVAL;
+    return (void *) 0;
+  }
+
+  new_area = malloc( size );
+  if ( !new_area ) {
+    free( ptr );
+    return (void *) 0;
+  }
+
+  memcpy( new_area, ptr, (size < old_size) ? size : old_size );
+  free( ptr );
+
+  return new_area;
+
+}
+
+void free(
+  void *ptr
+)
+{
+  rtems_status_code status;
+
+  if ( !ptr )
+    return;
+
+  status = rtems_region_return_segment( RTEMS_Malloc_Heap, ptr );
+  if ( status != RTEMS_SUCCESSFUL ) {
+    errno = EINVAL;
+    assert( 0 );
+  }
+}
+
+/*
+ *  "Reentrant" versions of the above routines implemented above.
+ */
+
+#ifdef RTEMS_NEWLIB
+void *malloc_r(
+  struct _reent *ignored,
+  size_t  size
+)
+{
+  return malloc( size );
+}
+
+void *calloc_r(
+  size_t nelem,
+  size_t elsize
+)
+{
+  return calloc( nelem, elsize );
+}
+
+void *realloc_r(
+  void *ptr,
+  size_t size
+)
+{
+  return realloc_r( ptr, size );
+}
+
+void free_r(
+  void *ptr
+)
+{
+  free( ptr );
+}
+#endif
+

c/src/lib/libc/newlibc.c

@@ -0,0 +1,292 @@
+/*
+ *	@(#)newlibc.c	1.8 - 95/04/25
+ *	
+ */
+
+#if defined(RTEMS_NEWLIB)
+
+/*
+ *  File:	$RCSfile$
+ *  Project:	PixelFlow
+ *  Created:	94/12/7
+ *  Revision:	$Revision$
+ *  Last Mod:	$Date$
+ *
+ *  COPYRIGHT (c) 1994 by Division Incorporated
+ *
+ *  To anyone who acknowledges that this file is provided "AS IS"
+ *  without any express or implied warranty:
+ *      permission to use, copy, modify, and distribute this file
+ *      for any purpose is hereby granted without fee, provided that
+ *      the above copyright notice and this notice appears in all
+ *      copies, and that the name of Division Incorporated not be
+ *      used in advertising or publicity pertaining to distribution
+ *      of the software without specific, written prior permission.
+ *      Division Incorporated makes no representations about the
+ *      suitability of this software for any purpose.
+ *
+ *  Description:
+ *      Implementation of hooks for the CYGNUS newlib libc
+ *      These hooks set things up so that:
+ *              '_REENT' is switched at task switch time.
+ *
+ *
+ *  TODO:
+ *
+ *  NOTE:
+ *
+ *  $Id$
+ *
+ */
+
+#include <rtems.h>
+#include <libcsupport.h>
+#include <stdlib.h>             /* for free() */
+#include <string.h>             /* for memset() */
+
+#include <sys/reent.h>          /* for extern of _REENT (aka _impure_ptr) */
+
+#include "internal.h"
+
+#define LIBC_NOTEPAD RTEMS_NOTEPAD_LAST
+
+
+int              libc_reentrant;        /* do we think we are reentrant? */
+struct _reent    libc_global_reent = _REENT_INIT(libc_global_reent);;
+
+/*
+ * CYGNUS newlib routine that does atexit() processing and flushes
+ *      stdio streams
+ *      undocumented
+ */
+
+extern void _wrapup_reent(struct _reent *);
+extern void _reclaim_reent(struct _reent *);
+
+void
+libc_wrapup(void)
+{
+    _wrapup_reent(0);
+    if (_REENT != &libc_global_reent)
+    {
+        _wrapup_reent(&libc_global_reent);
+#if 0
+        /* don't reclaim this one, just in case we do printfs */
+        /* on our way out to ROM */
+        _reclaim_reent(&libc_global_reent);
+#endif
+        _REENT = &libc_global_reent;
+    }
+}
+
+
+rtems_extension
+libc_create_hook(rtems_tcb *current_task,
+                 rtems_tcb *creating_task)
+{
+    MY_task_set_note(creating_task, LIBC_NOTEPAD, 0);
+}
+
+/*
+ * Called for all user TASKS (system tasks are SYSI and IDLE)
+ */
+
+rtems_extension
+libc_start_hook(rtems_tcb *current_task,
+                rtems_tcb *starting_task)
+{
+    struct _reent *ptr;
+
+    /* NOTE: our malloc is reentrant without a reent ptr since
+     *  it is based on region manager
+     */
+
+    ptr = (struct _reent *) malloc(sizeof(struct _reent));
+
+    /* GCC extension: structure constants */
+    *ptr = (struct _reent) _REENT_INIT((*ptr));
+
+    MY_task_set_note(starting_task, LIBC_NOTEPAD, (rtems_unsigned32) ptr);
+}
+
+rtems_extension
+libc_switch_hook(rtems_tcb *current_task,
+                 rtems_tcb *heir_task)
+{
+    rtems_unsigned32 impure_value;
+
+    /* XXX We can't use rtems_task_set_note() here since SYSI task has a
+     * tid of 0, which is treated specially (optimized, actually)
+     * by rtems_task_set_note
+     */
+
+    impure_value = (rtems_unsigned32) _REENT;
+    MY_task_set_note(current_task, LIBC_NOTEPAD, impure_value);
+
+    _REENT = (struct _reent *) MY_task_get_note(heir_task, LIBC_NOTEPAD);
+
+}
+
+/*
+ *  Function:   libc_delete_hook
+ *  Created:    94/12/10
+ *
+ *  Description:
+ *      Called when a task is deleted.
+ *      Must restore the new lib reentrancy state for the new current
+ *      task.
+ *
+ *  Parameters:
+ *
+ *
+ *  Returns:
+ *
+ *
+ *  Side Effects:
+ *
+ *  Notes:
+ *
+ *
+ *  Deficiencies/ToDo:
+ *
+ *
+ */
+rtems_extension
+libc_delete_hook(rtems_tcb *current_task,
+                 rtems_tcb *deleted_task)
+{
+    struct _reent *ptr;
+
+    /*
+     * The reentrancy structure was allocated by newlib using malloc()
+     */
+
+    if (current_task == deleted_task)
+    {
+        ptr = _REENT;
+    }
+    else
+    {
+        ptr = (struct _reent *) MY_task_get_note(deleted_task, LIBC_NOTEPAD);
+    }
+
+    if (ptr)
+    {
+        _wrapup_reent(ptr);
+        _reclaim_reent(ptr);
+    }
+
+    MY_task_set_note(deleted_task, LIBC_NOTEPAD, 0);
+
+    /*
+     * Require the switch back to another task to install its own
+     */
+
+    if (current_task == deleted_task)
+    {
+        _REENT = 0;
+    }
+}
+
+/*
+ *  Function:   libc_init
+ *  Created:    94/12/10
+ *
+ *  Description:
+ *      Init libc for CYGNUS newlib
+ *      Set up _REENT to use our global libc_global_reent.
+ *      (newlib provides a global of its own, but we prefer our
+ *      own name for it)
+ *
+ *      If reentrancy is desired (which it should be), then
+ *      we install the task extension hooks to maintain the
+ *      newlib reentrancy global variable _REENT on task
+ *      create, delete, switch, exit, etc.
+ *
+ *  Parameters:
+ *      reentrant               non-zero if reentrant library desired.
+ *
+ *  Returns:
+ *
+ *  Side Effects:
+ *      installs libc extensions if reentrant.
+ *
+ *  Notes:
+ *
+ *
+ *  Deficiencies/ToDo:
+ *
+ */
+
+void
+libc_init(int reentrant)
+{
+    rtems_extensions_table  libc_extension;
+    rtems_id                extension_id;
+    rtems_status_code       rc;
+
+    _REENT = &libc_global_reent;
+
+    if (reentrant)
+    {
+        memset(&libc_extension, 0, sizeof(libc_extension));
+
+        libc_extension.rtems_task_create  = libc_create_hook;
+        libc_extension.rtems_task_start   = libc_start_hook;
+        libc_extension.task_switch  = libc_switch_hook;
+        libc_extension.rtems_task_delete  = libc_delete_hook;
+
+        rc = rtems_extension_create(rtems_build_name('L', 'I', 'B', 'C'),
+                              &libc_extension, &extension_id);
+        if (rc != RTEMS_SUCCESSFUL)
+            rtems_fatal_error_occurred(rc);
+
+        libc_reentrant = reentrant;
+    }
+}
+
+
+void
+exit(int status)
+{
+    libc_wrapup();
+    rtems_shutdown_executive(status);
+}
+
+
+/*
+ *  Function:   _exit
+ *  Created:    94/12/10
+ *
+ *  Description:
+ *      Called from exit() after it does atexit() processing and stdio fflush's
+ *
+ *      called from bottom of exit() to really delete the task.
+ *      If we are using reentrant libc, then let the delete extension
+ *      do all the work, otherwise if a shutdown is in progress,
+ *      then just do it.
+ *
+ *  Parameters:
+ *      exit status
+ *
+ *  Returns:
+ *      does not return
+ *
+ *  Side Effects:
+ *
+ *  Notes:
+ *
+ *
+ *  Deficiencies/ToDo:
+ *
+ *
+ */
+
+#ifndef RTEMS_UNIX
+void _exit(int status)
+{
+    rtems_shutdown_executive(status);
+}
+#endif
+
+#endif

c/src/lib/libc/no_libc.c

@@ -0,0 +1,45 @@
+#if  !defined(RTEMS_LIBC) && !defined(RTEMS_NEWLIB) && !defined(RTEMS_UNIX)
+
+/*  no_libc.h
+ *
+ *  This file contains stubs for the reentrancy hooks when
+ *  an unknown C library is used.
+ *
+ *  COPYRIGHT (c) 1989, 1990, 1991, 1992, 1993, 1994.
+ *  On-Line Applications Research Corporation (OAR).
+ *  All rights assigned to U.S. Government, 1994.
+ *
+ *  This material may be reproduced by or for the U.S. Government pursuant
+ *  to the copyright license under the clause at DFARS 252.227-7013.  This
+ *  notice must appear in all copies of this file and its derivatives.
+ *
+ *  $Id$
+ */
+
+
+#include <rtems.h>
+
+#include "libcsupport.h"
+#include "internal.h"
+
+#include <stdlib.h>             /* for free() */
+
+void
+libc_init(int reentrant)
+{
+}
+
+void libc_suspend_main(void)
+{
+}
+
+
+void libc_global_exit(rtems_unsigned32 code)
+{
+}
+
+void _exit(int status)
+{
+}
+
+#endif

c/src/lib/libc/support.c

@@ -0,0 +1,44 @@
+/*
+ *  Routines to Access Internal RTEMS Resources
+ *
+ *  COPYRIGHT (c) 1989, 1990, 1991, 1992, 1993, 1994.
+ *  On-Line Applications Research Corporation (OAR).
+ *  All rights assigned to U.S. Government, 1994.
+ *
+ *  This material may be reproduced by or for the U.S. Government pursuant
+ *  to the copyright license under the clause at DFARS 252.227-7013.  This
+ *  notice must appear in all copies of this file and its derivatives.
+ *
+ *  $Id$
+ *
+ */
+
+#include <rtems/system.h>
+#include <rtems/thread.h>
+
+void MY_task_set_note(
+  Thread_Control *the_thread,
+  unsigned32      notepad,
+  unsigned32      note
+)
+{
+  the_thread->Notepads[ notepad ] = note;
+}
+
+
+unsigned32 MY_task_get_note(
+  Thread_Control *the_thread,
+  unsigned32      notepad
+)
+{
+  return the_thread->Notepads[ notepad ];
+}
+
+void *MY_CPU_Context_FP_start(
+  void       *base,
+  unsigned32  offset
+)
+{
+  return _CPU_Context_Fp_start( base, offset );
+}
+

c/src/lib/libc/syscalls.c

@@ -0,0 +1,77 @@
+#if !defined(RTEMS_UNIX)
+
+/*
+ *  RTEMS Fake System Calls
+ *
+ *  This file contains "fake" versions of the system call routines
+ *  which are reference by many libc implementations.  Once a routine
+ *  has been implemented in terms of RTEMS services, it should be
+ *  taken out of this file.
+ *
+ *  COPYRIGHT (c) 1989, 1990, 1991, 1992, 1993, 1994.
+ *  On-Line Applications Research Corporation (OAR).
+ *  All rights assigned to U.S. Government, 1994.
+ *
+ *  This material may be reproduced by or for the U.S. Government pursuant
+ *  to the copyright license under the clause at DFARS 252.227-7013.  This
+ *  notice must appear in all copies of this file and its derivatives.
+ *
+ *  $Id$
+ *
+ */
+
+#include <sys/types.h>
+#include <sys/stat.h>
+
+int
+__fstat(int _fd, struct stat* _sbuf)
+{
+  return -1;
+}
+
+int
+__isatty(int _fd)
+{
+  return 1;
+}
+
+int
+__close(int _fd)
+{
+  /* return value usually ignored anyhow */
+  return 0;
+}
+
+int
+__open(const char *filename)
+{
+  /* always fail */
+  return -1;
+}
+
+int
+__lseek(int _fd, off_t offset, int whence)
+{
+  /* nothing is ever seekable */
+  return -1;
+}
+
+int stat( const char *path, struct stat *buf )
+{
+  /* always fail */
+  return -1;
+}
+
+int link( const char *existing, const char *new )
+{
+  /* always fail */
+  return -1;
+}
+
+int unlink( const char *path )
+{
+  /* always fail */
+  return -1;
+}
+
+#endif

c/src/lib/libc/unixlibc.c

@@ -0,0 +1,7 @@
+#if defined(RTEMS_UNIXLIB)
+
+void libc_init(int reentrant)
+{
+}
+
+#endif