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/*
* COPYRIGHT (c) 2012 Chris Johns <chrisj@rtems.org>
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.org/license/LICENSE.
*/
/**
* @file
*
* @ingroup rtems_rtl
*
* @brief RTEMS Run-Time Linker Allocator
*/
#include <stdio.h>
#include <rtems/rtl/rtl.h>
#include "rtl-alloc-heap.h"
#include "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_t* 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_t tag, size_t size, bool zero)
{
rtems_rtl_data_t* rtl = rtems_rtl_lock ();
void* address = NULL;
/*
* Obtain memory from the allocator. The address field is set by the
* allocator.
*/
if (rtl)
rtl->allocator.allocator (true, 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 && zero)
memset (address, 0, size);
return address;
}
void
rtems_rtl_alloc_del (rtems_rtl_alloc_tag_t tag, void* address)
{
rtems_rtl_data_t* 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 && address)
rtl->allocator.allocator (false, tag, &address, 0);
rtems_rtl_unlock ();
}
rtems_rtl_allocator_t
rtems_rtl_alloc_hook (rtems_rtl_allocator_t handler)
{
rtems_rtl_data_t* rtl = rtems_rtl_lock ();
rtems_rtl_allocator_t previous = rtl->allocator.allocator;
rtl->allocator.allocator = handler;
rtems_rtl_unlock ();
return previous;
}
void
rtems_rtl_alloc_indirect_new (rtems_rtl_alloc_tag_t tag,
rtems_rtl_ptr_t* handle,
size_t size)
{
rtems_rtl_data_t* 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_t* 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_t tag,
rtems_rtl_ptr_t* handle)
{
rtems_rtl_data_t* 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);
}
}
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 (text_size)
{
*text_base = rtems_rtl_alloc_new (RTEMS_RTL_ALLOC_READ_EXEC,
text_size, false);
if (!*text_base)
{
return false;
}
}
if (const_size)
{
*const_base = rtems_rtl_alloc_new (RTEMS_RTL_ALLOC_READ,
const_size, false);
if (!*const_base)
{
rtems_rtl_alloc_module_del (text_base, const_base, eh_base,
data_base, bss_base);
return false;
}
}
if (eh_size)
{
*eh_base = rtems_rtl_alloc_new (RTEMS_RTL_ALLOC_READ,
eh_size, false);
if (!*eh_base)
{
rtems_rtl_alloc_module_del (text_base, const_base, eh_base,
data_base, bss_base);
return false;
}
}
if (data_size)
{
*data_base = rtems_rtl_alloc_new (RTEMS_RTL_ALLOC_READ_WRITE,
data_size, false);
if (!*data_base)
{
rtems_rtl_alloc_module_del (text_base, const_base, eh_base,
data_base, bss_base);
return false;
}
}
if (bss_size)
{
*bss_base = rtems_rtl_alloc_new (RTEMS_RTL_ALLOC_READ_WRITE,
bss_size, false);
if (!*bss_base)
{
rtems_rtl_alloc_module_del (text_base, const_base, eh_base,
data_base, bss_base);
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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