1 files changed, 208 insertions, 0 deletions
diff --git a/nuttx/binfmt/libnxflat/libnxflat_load.c b/nuttx/binfmt/libnxflat/libnxflat_load.c
new file mode 100644
index 000000000..25be05621
--- /dev/null
+++ b/nuttx/binfmt/libnxflat/libnxflat_load.c
@@ -0,0 +1,208 @@
+/****************************************************************************
+ * binfmt/libnxflat/libnxflat_load.c
+ *
+ *   Copyright (C) 2009 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * 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.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * 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.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <sys/types.h>
+#include <sys/mman.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <nxflat.h>
+#include <debug.h>
+#include <errno.h>
+
+#include <arpa/inet.h>
+#include <nuttx/nxflat.h>
+
+/****************************************************************************
+ * Pre-Processor Definitions
+ ****************************************************************************/
+
+#ifndef MAX
+#define MAX(x,y) ((x) > (y) ? (x) : (y))
+#endif
+
+/****************************************************************************
+ * Private Constant Data
+ ****************************************************************************/
+
+#if defined(CONFIG_DEBUG_VERBOSE) && defined(CONFIG_DEBUG_BINFMT)
+static const char g_relocrel32i[]  = "RELOC_REL32I";
+static const char g_relocrel32d[]  = "RELOC_REL32D";
+static const char g_relocabs32[]   = "RELOC_AB32";
+static const char g_undefined[]    = "UNDEFINED";
+
+static const char *g_reloctype[] =
+{
+  g_relocrel32i,
+  g_relocrel32d,
+  g_relocabs32,
+  g_undefined
+};
+#  define RELONAME(rl) g_reloctype[NXFLAT_RELOC_TYPE(rl)]
+#else
+#  define RELONAME(rl) "(no name)"
+#endif
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: nxflat_load
+ *
+ * Description:
+ *   Loads the binary specified by nxflat_init into memory, mapping
+ *   the I-space executable regions, allocating the D-Space region,
+ *   and inializing the data segment (relocation information is
+ *   temporarily loaded into the BSS region.  BSS will be cleared
+ *   by nxflat_bind() after the relocation data has been processed).
+ *
+ * Returned Value:
+ *   0 (OK) is returned on success and a negated errno is returned on
+ *   failure.
+ *
+ ****************************************************************************/
+
+int nxflat_load(struct nxflat_loadinfo_s *loadinfo)
+{
+  off_t    doffset;     /* Offset to .data in the NXFLAT file */
+  uint32_t dreadsize;   /* Total number of bytes of .data to be read */
+  uint32_t relocsize;   /* Memory needed to hold relocations */
+  uint32_t extrasize;   /* MAX(BSS size, relocsize) */
+  int      ret = OK;
+
+  /* Calculate the extra space we need to allocate.  This extra space will be
+   * the size of the BSS section.  This extra space will also be used
+   * temporarily to hold relocation information.  So the allocated size of this
+   * region will either be the size of .data + size of.bss section OR, the
+   * size of .data + the relocation entries, whichever is larger
+   *
+   * This is the amount of memory that we have to have to hold the
+   * relocations.
+   */
+
+  relocsize  = loadinfo->reloccount * sizeof(struct nxflat_reloc_s);
+
+  /* In the file, the relocations should lie at the same offset as BSS.
+   * The additional amount that we allocate have to be either (1) the
+   * BSS size, or (2) the size of the relocation records, whicher is
+   * larger.
+   */
+
+  extrasize = MAX(loadinfo->bsssize, relocsize);
+
+  /* Use this additional amount to adjust the total size of the dspace
+   * region.
+   */
+
+  loadinfo->dsize = loadinfo->datasize + extrasize;
+
+  /* The number of bytes of data that we have to read from the file is
+   * the data size plus the size of the relocation table.
+   */
+
+  dreadsize = loadinfo->datasize + relocsize;
+
+  /* We'll need this a few times. */
+
+  doffset = loadinfo->isize;
+
+  /* We will make two mmap calls create an address space for the executable.
+   * We will attempt to map the file to get the ISpace address space and
+   * to allocate RAM to get the DSpace address space.  If the filesystem does
+   * not support file mapping, the map() implementation should do the
+   * right thing.
+   */
+
+  /* The following call will give as a pointer to the mapped file ISpace.
+   * This may be in ROM, RAM, Flash, ... We don't really care where the memory
+   * resides as long as it is fully initialized and ready to execute.
+   */
+
+  loadinfo->ispace = (uint32_t)mmap(NULL, loadinfo->isize, PROT_READ,
+                                  MAP_SHARED|MAP_FILE, loadinfo->filfd, 0);
+  if (loadinfo->ispace == (uint32_t)MAP_FAILED)
+    {
+      bdbg("Failed to map NXFLAT ISpace: %d\n", errno);
+      return -errno;
+    }
+
+  bvdbg("Mapped ISpace (%d bytes) at %08x\n", loadinfo->isize, loadinfo->ispace);
+
+  /* The following call will give a pointer to the allocated but
+   * uninitialized ISpace memory.
+   */
+
+  loadinfo->dspace = (struct dspace_s *)malloc(SIZEOF_DSPACE_S(loadinfo->dsize));
+  if (loadinfo->dspace == 0)
+    {
+      bdbg("Failed to allocate DSpace\n");
+      ret = -ENOMEM;
+      goto errout;
+    }
+  loadinfo->dspace->crefs = 1;
+
+  bvdbg("Allocated DSpace (%d bytes) at %p\n", loadinfo->dsize, loadinfo->dspace->region);
+
+  /* Now, read the data into allocated DSpace at doffset into the
+   * allocated DSpace memory.
+   */
+
+  ret = nxflat_read(loadinfo, (char*)loadinfo->dspace->region, dreadsize, doffset);
+  if (ret < 0)
+    {
+      bdbg("Failed to read .data section: %d\n", ret);
+      goto errout;
+    }
+       
+  bvdbg("TEXT: %08x Entry point offset: %08x Data offset: %08x\n",
+      loadinfo->ispace, loadinfo->entryoffs, doffset);
+
+  return OK;
+
+errout:
+  (void)nxflat_unload(loadinfo);
+  return ret;
+}
+