Finishes basic coding of ELF file support

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5259 42af7a65-404d-4744-a932-0658087f49c3
2026-09-27 18:58:27 +08:00 · 2012-10-25 19:21:47 +00:00
parent 86618a177b
commit 87e9dbc4c8
9 changed files with 493 additions and 11 deletions
@@ -0,0 +1,134 @@
+/****************************************************************************
+ * binfmt/libelf/libelf_ctors.c
+ *
+ *   Copyright (C) 2012 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.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.
+ * 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 <debug.h>
+
+#include <nuttx/binfmt/elf.h>
+
+#include "libelf"
+
+#ifdef CONFIG_ELF_CONSTRUCTORS
+
+/****************************************************************************
+ * Pre-Processor Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Types
+ ****************************************************************************/
+
+typedef FAR void (*ctor_t)(void);
+
+/****************************************************************************
+ * Private Constant Data
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: elf_findctors
+ *
+ * Description:
+ *   Find C++ static constructors.
+ *
+ * Input Parameters:
+ *   loadinfo - Load state information
+ *
+ * Returned Value:
+ *   0 (OK) is returned on success and a negated errno is returned on
+ *   failure.
+ *
+ ****************************************************************************/
+
+int elf_findctors(FAR struct elf_loadinfo_s *loadinfo)
+{
+  /* Search through the shdr[] array in loadinfo for a section named .ctors */
+#warning "Missing logic"
+
+  /* Get the address of the beginning of the constructros from the sh_addr
+   * field of the section.  Save that in the ctors field of the loadinfo
+   * structure.
+   */
+#warning "Missing logic"
+
+  /* Get the number of constructors from the sh_size field of the section.
+   * Save that number in the nctors field of the loadinfo structure.
+   */ 
+#warning "Missing logic"
+  return -ENOSYS;
+}
+
+/****************************************************************************
+ * Name: elf_doctors
+ *
+ * Description:
+ *   Execute C++ static constructors.
+ *
+ * Input Parameters:
+ *   loadinfo - Load state information
+ *
+ * Returned Value:
+ *   0 (OK) is returned on success and a negated errno is returned on
+ *   failure.
+ *
+ ****************************************************************************/
+
+int elf_doctors(FAR struct elf_loadinfo_s *loadinfo)
+{
+  ctor_t ctor = (ctor_t)loadinfo->ctors;
+  int i;
+
+  /* Execute each constructor */
+
+  for (i = 0; i < loadinfo->nctors; i++)
+    {
+      ctor();
+      ctor++;
+    }
+}
+
+#endif /* CONFIG_ELF_CONSTRUCTORS