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 /* SPDX-License-Identifier: BSD-2-Clause */
 
 /**
  * @file
  *
  * @ingroup rtems_rtl
  *
  * @brief RTEMS Run-Time Linker Allocator
  */
 
 /*
  *  COPYRIGHT (c) 2012, 2018, 2023 Chris Johns <chrisj@rtems.org>
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  * POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include <stdio.h>
 #include <string.h>
 
 #include <rtems/rtl/rtl.h>
 #include "rtl-alloc-heap.h"
 #include <rtems/rtl/rtl-trace.h>
 
 /**
  * Tags as symbols for tracing.
  */
 #if RTEMS_RTL_TRACE
 static const char* tag_labels[6] =
 {
   "OBJECT",
   "SYMBOL",
   "EXTERNAL",
   "READ",
   "READ_WRITE",
   "READ_EXEC",
 };
 #define rtems_rtl_trace_tag_label(_l) tag_labels[_l]
 #else
 #define rtems_rtl_trace_tag_label(_l) ""
 #endif
 
 void
 rtems_rtl_alloc_initialise (rtems_rtl_alloc_data* data)
 {
   int c;
   data->allocator = rtems_rtl_alloc_heap;
   for (c = 0; c < RTEMS_RTL_ALLOC_TAGS; ++c)
     rtems_chain_initialize_empty (&data->indirects[c]);
 }
 
 void*
 rtems_rtl_alloc_new (rtems_rtl_alloc_tag tag, size_t size, bool zero)
 {
   rtems_rtl_data* rtl = rtems_rtl_lock ();
   void*           address = NULL;
 
   /*
    * Obtain memory from the allocator. The address field is set by the
    * allocator.
    */
   if (rtl != NULL)
     rtl->allocator.allocator (RTEMS_RTL_ALLOC_NEW, tag, &address, size);
 
   rtems_rtl_unlock ();
 
   if (rtems_rtl_trace (RTEMS_RTL_TRACE_ALLOCATOR))
     printf ("rtl: alloc: new: %s addr=%p size=%zu\n",
             rtems_rtl_trace_tag_label (tag), address, size);
 
   /*
    * Only zero the memory if asked to and the allocation was successful.
    */
   if (address != NULL && zero)
     memset (address, 0, size);
 
   return address;
 }
 
 void
 rtems_rtl_alloc_del (rtems_rtl_alloc_tag tag, void* address)
 {
   rtems_rtl_data* rtl = rtems_rtl_lock ();
 
   if (rtems_rtl_trace (RTEMS_RTL_TRACE_ALLOCATOR))
     printf ("rtl: alloc: del: %s addr=%p\n",
             rtems_rtl_trace_tag_label (tag), address);
 
   if (rtl != NULL && address != NULL)
     rtl->allocator.allocator (RTEMS_RTL_ALLOC_DEL, tag, &address, 0);
 
   rtems_rtl_unlock ();
 }
 
 void* rtems_rtl_alloc_resize (rtems_rtl_alloc_tag tag,
                               void*               address,
                               size_t              size,
                               bool                zero)
 {
   rtems_rtl_data* rtl = rtems_rtl_lock ();
   const void* prev_address = address;
 
   /*
    * Resize memory of an existing allocation. The address field is set
    * by the allocator and may change.
    */
   if (rtl != NULL)
     rtl->allocator.allocator (RTEMS_RTL_ALLOC_RESIZE, tag, &address, size);
 
   rtems_rtl_unlock ();
 
   if (rtems_rtl_trace (RTEMS_RTL_TRACE_ALLOCATOR))
     printf ("rtl: alloc: resize: %s%s prev-addr=%p addr=%p size=%zu\n",
             rtems_rtl_trace_tag_label (tag), prev_address == address ? "" : " MOVED",
             prev_address, address, size);
 
   /*
    * Only zero the memory if asked to and the resize was successful. We
    * cannot clear the resized area if bigger than the previouis allocation
    * because we do not have the original size.
    */
   if (address != NULL && zero)
     memset (address, 0, size);
 
   return address;
 }
 
 void
 rtems_rtl_alloc_wr_enable (rtems_rtl_alloc_tag tag, void* address)
 {
   rtems_rtl_data* rtl = rtems_rtl_lock ();
 
   if (rtems_rtl_trace (RTEMS_RTL_TRACE_ALLOCATOR))
     printf ("rtl: alloc: wr-enable: addr=%p\n", address);
 
   if (rtl != NULL && address != NULL)
     rtl->allocator.allocator (RTEMS_RTL_ALLOC_WR_ENABLE,
                               tag,
                               address,
                               0);
 
   rtems_rtl_unlock ();
 }
 
 void
 rtems_rtl_alloc_lock (void)
 {
   rtems_rtl_data* rtl = rtems_rtl_lock ();
 
   if (rtems_rtl_trace (RTEMS_RTL_TRACE_ALLOCATOR))
     printf ("rtl: alloc: lock\n");
 
   if (rtl != NULL)
     rtl->allocator.allocator (RTEMS_RTL_ALLOC_LOCK,
                               RTEMS_RTL_ALLOC_OBJECT, /* should be ignored */
                               NULL,
                               0);
 
   rtems_rtl_unlock ();
 }
 
 
 void
 rtems_rtl_alloc_unlock (void)
 {
   rtems_rtl_data* rtl = rtems_rtl_lock ();
 
   if (rtems_rtl_trace (RTEMS_RTL_TRACE_ALLOCATOR))
     printf ("rtl: alloc: unlock\n");
 
   if (rtl != NULL)
     rtl->allocator.allocator (RTEMS_RTL_ALLOC_UNLOCK,
                               RTEMS_RTL_ALLOC_OBJECT, /* should be ignored */
                               NULL,
                               0);
 
   rtems_rtl_unlock ();
 }
 void
 rtems_rtl_alloc_wr_disable (rtems_rtl_alloc_tag tag, void* address)
 {
   rtems_rtl_data* rtl = rtems_rtl_lock ();
 
   if (rtems_rtl_trace (RTEMS_RTL_TRACE_ALLOCATOR))
     printf ("rtl: alloc: wr-disable: addr=%p\n", address);
 
   if (rtl != NULL && address != NULL)
     rtl->allocator.allocator (RTEMS_RTL_ALLOC_WR_DISABLE,
                               tag,
                               address,
                               0);
 
   rtems_rtl_unlock ();
 }
 
 rtems_rtl_allocator
 rtems_rtl_alloc_hook (rtems_rtl_allocator handler)
 {
   rtems_rtl_data*     rtl = rtems_rtl_lock ();
   rtems_rtl_allocator previous = rtl->allocator.allocator;
   rtl->allocator.allocator = handler;
   rtems_rtl_unlock ();
   return previous;
 }
 
 void
 rtems_rtl_alloc_indirect_new (rtems_rtl_alloc_tag tag,
                               rtems_rtl_ptr*      handle,
                               size_t              size)
 {
   rtems_rtl_data* rtl = rtems_rtl_lock ();
 
   if (rtems_rtl_trace (RTEMS_RTL_TRACE_ALLOCATOR))
   {
     if (!rtems_rtl_ptr_null (handle))
       printf ("rtl: alloc: inew: %s handle=%p: not null\n",
               rtems_rtl_trace_tag_label (tag), handle);
     printf ("rtl: alloc: inew: %s handle=%p size=%zd\n",
             rtems_rtl_trace_tag_label (tag), handle, size);
   }
 
   if (rtl)
   {
     rtems_rtl_alloc_data* allocator = &rtl->allocator;
     handle->pointer = rtems_rtl_alloc_new (tag, size, false);
     if (!rtems_rtl_ptr_null (handle))
       rtems_chain_append_unprotected (&allocator->indirects[tag],
                                       &handle->node);
   }
 
   rtems_rtl_unlock ();
 }
 
 void
 rtems_rtl_alloc_indirect_del (rtems_rtl_alloc_tag tag,
                               rtems_rtl_ptr*      handle)
 {
   rtems_rtl_data* rtl = rtems_rtl_lock ();
 
   if (rtems_rtl_trace (RTEMS_RTL_TRACE_ALLOCATOR))
   {
     if (rtems_rtl_ptr_null (handle))
       printf ("rtl: alloc: idel: %s handle=%p: is null\n",
               rtems_rtl_trace_tag_label (tag), handle);
     printf ("rtl: alloc: idel: %s handle=%p\n",
             rtems_rtl_trace_tag_label (tag), handle);
   }
 
   if (rtl && !rtems_rtl_ptr_null (handle))
   {
     rtems_chain_extract_unprotected (&handle->node);
     rtems_rtl_alloc_del (tag, &handle->pointer);
   }
 }
 
 rtems_rtl_alloc_tag
 rtems_rtl_alloc_text_tag (void)
 {
   return RTEMS_RTL_ALLOC_READ_EXEC;
 }
 
 rtems_rtl_alloc_tag
 rtems_rtl_alloc_const_tag (void)
 {
   return RTEMS_RTL_ALLOC_READ;
 }
 
 rtems_rtl_alloc_tag
 rtems_rtl_alloc_eh_tag (void)
 {
   return RTEMS_RTL_ALLOC_READ;
 }
 
 rtems_rtl_alloc_tag
 rtems_rtl_alloc_data_tag (void)
 {
   return RTEMS_RTL_ALLOC_READ_WRITE;
 }
 
 rtems_rtl_alloc_tag
 rtems_rtl_alloc_bss_tag (void)
 {
   return RTEMS_RTL_ALLOC_READ_WRITE;
 }
 
 bool
 rtems_rtl_alloc_module_new (void** text_base, size_t text_size,
                             void** const_base, size_t const_size,
                             void** eh_base, size_t eh_size,
                             void** data_base, size_t data_size,
                             void** bss_base, size_t bss_size)
 {
   *text_base = *const_base = *data_base = *bss_base = NULL;
 
   if (data_size != 0)
   {
     *data_base = rtems_rtl_alloc_new (rtems_rtl_alloc_data_tag (),
                                       data_size, false);
     if (*data_base == NULL)
     {
       rtems_rtl_alloc_module_del (text_base, const_base, eh_base,
                                   data_base, bss_base);
       return false;
     }
   }
 
   if (bss_size != 0)
   {
     *bss_base = rtems_rtl_alloc_new (rtems_rtl_alloc_bss_tag (),
                                      bss_size, false);
     if (*bss_base == NULL)
     {
       rtems_rtl_alloc_module_del (text_base, const_base, eh_base,
                                   data_base, bss_base);
       return false;
     }
   }
 
   if (eh_size != 0)
   {
     *eh_base = rtems_rtl_alloc_new (rtems_rtl_alloc_eh_tag (),
                                     eh_size, false);
     if (*eh_base == NULL)
     {
       rtems_rtl_alloc_module_del (text_base, const_base, eh_base,
                                   data_base, bss_base);
       return false;
     }
   }
 
   if (const_size != 0)
   {
     *const_base = rtems_rtl_alloc_new (rtems_rtl_alloc_const_tag (),
                                        const_size, false);
     if (*const_base == NULL)
     {
       rtems_rtl_alloc_module_del (text_base, const_base, eh_base,
                                   data_base, bss_base);
       return false;
     }
   }
 
   if (text_size != 0)
   {
     *text_base = rtems_rtl_alloc_new (rtems_rtl_alloc_text_tag (),
                                       text_size, false);
     if (*text_base == NULL)
     {
       return false;
     }
   }
 
   return true;
 }
 
 bool
 rtems_rtl_alloc_module_resize (void** text_base, size_t text_size,
                                void** const_base, size_t const_size,
                                void** eh_base, size_t eh_size,
                                void** data_base, size_t data_size,
                                void** bss_base, size_t bss_size)
 {
   if (data_size != 0)
   {
     *data_base = rtems_rtl_alloc_resize (rtems_rtl_alloc_data_tag (),
                                          *data_base, data_size, false);
     if (*data_base == NULL)
     {
       return false;
     }
   }
 
   if (bss_size != 0)
   {
     *bss_base = rtems_rtl_alloc_resize (rtems_rtl_alloc_bss_tag (),
                                         *bss_base, bss_size, false);
     if (*bss_base == NULL)
     {
       return false;
     }
   }
 
   if (eh_size != 0)
   {
     *eh_base = rtems_rtl_alloc_resize (rtems_rtl_alloc_eh_tag (),
                                        *eh_base, eh_size, false);
     if (*eh_base == NULL)
     {
       return false;
     }
   }
 
   if (const_size != 0)
   {
     *const_base = rtems_rtl_alloc_resize (rtems_rtl_alloc_const_tag (),
                                           *const_base, const_size, false);
     if (*const_base == NULL)
     {
       return false;
     }
   }
 
   if (text_size != 0)
   {
     *text_base = rtems_rtl_alloc_resize (rtems_rtl_alloc_text_tag (),
                                          *text_base, text_size, false);
     if (*text_base == NULL)
     {
       return false;
     }
   }
 
   return true;
 }
 
 void
 rtems_rtl_alloc_module_del (void** text_base,
                             void** const_base,
                             void** eh_base,
                             void** data_base,
                             void** bss_base)
 {
   rtems_rtl_alloc_del (RTEMS_RTL_ALLOC_READ_WRITE, *bss_base);
   rtems_rtl_alloc_del (RTEMS_RTL_ALLOC_READ_WRITE, *data_base);
   rtems_rtl_alloc_del (RTEMS_RTL_ALLOC_READ, *eh_base);
   rtems_rtl_alloc_del (RTEMS_RTL_ALLOC_READ, *const_base);
   rtems_rtl_alloc_del (RTEMS_RTL_ALLOC_READ_EXEC, *text_base);
   *text_base = *const_base = *eh_base = *data_base = *bss_base = NULL;
 }

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