Import the current project to git.

1 files changed, 155 insertions, 0 deletions

diff --git a/rtl-mdreloc-powerpc.c b/rtl-mdreloc-powerpc.c
new file mode 100644
index 0000000..eb6c9b9
--- /dev/null
+++ b/rtl-mdreloc-powerpc.c
@@ -0,0 +1,155 @@
+/*
+ * Taken from NetBSD and stripped of the relocations not needed on RTEMS.
+ *
+ *  $Id$
+ */
+
+/*  $NetBSD: ppc_reloc.c,v 1.44 2010/01/13 20:17:22 christos Exp $  */
+
+/*-
+ * Copyright (C) 1998  Tsubai Masanari
+ * Portions copyright 2002 Charles M. Hannum <root@ihack.net>
+ * All rights reserved.
+ *
+ * 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. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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 <sys/cdefs.h>
+
+#include <errno.h>
+#include <stdio.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+
+#include <rtl.h>
+#include "rtl-elf.h"
+#include "rtl-error.h"
+#include <rtl-trace.h>
+
+#define ha(x) ((((u_int32_t)(x) & 0x8000) ? \
+                 ((u_int32_t)(x) + 0x10000) : (u_int32_t)(x)) >> 16)
+#define l(x) ((u_int32_t)(x) & 0xffff)
+
+/*
+ * The PPC PLT format consists of three sections:
+ * (1) The "pltcall" and "pltresolve" glue code.  This is always 18 words.
+ * (2) The code part of the PLT entries.  There are 2 words per entry for
+ *     up to 8192 entries, then 4 words per entry for any additional entries.
+ * (3) The data part of the PLT entries, comprising a jump table.
+ *     This section is half the size of the second section (ie. 1 or 2 words
+ *     per entry).
+ */
+
+/*
+ * Setup the plt glue routines.
+ */
+#define PLTCALL_SIZE    20
+#define PLTRESOLVE_SIZE 24
+
+bool
+rtems_rtl_elf_relocate_rela (rtems_rtl_obj_t*      obj,
+                             const Elf_Rela*       rela,
+                             rtems_rtl_obj_sect_t* sect,
+                             const Elf_Sym*        sym,
+                             const char*           symname)
+{
+  Elf_Addr  target = 0;
+  Elf_Addr* where;
+  Elf_Word  symvalue;
+
+  where = (Elf_Addr *)(sect->base + rela->r_offset);
+
+  switch (ELF_R_TYPE(rela->r_info)) {
+    case R_TYPE(JMP_SLOT):
+    case R_TYPE(NONE):
+      break;
+
+    case R_TYPE(PC32):
+      if (!rtems_rtl_elf_find_symbol (obj, sym, symname, &symvalue))
+        return false;
+
+      target = (Elf_Addr) symvalue + rela->r_addend;
+      *where += target - (Elf_Addr)where;
+
+      if (rtems_rtl_trace (RTEMS_RTL_TRACE_RELOC))
+        printf ("rtl: reloc PC32 %s in %s --> %p (%p) in %s\n",
+                symname, sect->name, (void*) (symvalue + rela->r_addend),
+                (void *)*where, obj->oname);
+      break;
+
+    case R_TYPE(32):  /* word32 S + A */
+    case R_TYPE(GLOB_DAT):  /* word32 S + A */
+      if (!rtems_rtl_elf_find_symbol (obj, sym, symname, &symvalue))
+        return false;
+
+      target = (Elf_Addr) symvalue + rela->r_addend;
+
+      if (*where != target)
+        *where = target;
+
+      if (rtems_rtl_trace (RTEMS_RTL_TRACE_RELOC))
+        printf ("rtl: reloc 32/GLOB_DAT %s in %s --> %p in %s\n",
+                symname, sect->name, (void *)*where, obj->oname);
+      break;
+
+    case R_TYPE(RELATIVE):  /* word32 B + A */
+      *where += (Elf_Addr) sect->base + rela->r_addend;
+      if (rtems_rtl_trace (RTEMS_RTL_TRACE_RELOC))
+        printf ("rtl: reloc RELATIVE in %s --> %p\n", obj->oname, (void *)*where);
+      break;
+
+    case R_TYPE(COPY):
+      /*
+       * These are deferred until all other relocations have
+       * been done.  All we do here is make sure that the
+       * COPY relocation is not in a shared library.  They
+       * are allowed only in executable files.
+       */
+      printf ("rtl: reloc COPY (please report)\n");
+      break;
+
+    default:
+      printf ("rtl: reloc unknown: sym = %lu, type = %lu, offset = %p, "
+              "contents = %p, symbol = %s\n",
+              ELF_R_SYM(rela->r_info), (uint32_t) ELF_R_TYPE(rela->r_info),
+              (void *)rela->r_offset, (void *)*where, symname);
+      rtems_rtl_set_error (EINVAL,
+                           "%s: Unsupported relocation type %ld "
+                           "in non-PLT relocations",
+                           sect->name, (uint32_t) ELF_R_TYPE(rela->r_info));
+      return false;
+  }
+
+  return false;
+}
+
+bool
+rtems_rtl_elf_relocate_rel (rtems_rtl_obj_t*      obj,
+                            const Elf_Rel*        rel,
+                            rtems_rtl_obj_sect_t* sect,
+                            const Elf_Sym*        sym,
+                            const char*           symname)
+{
+  printf ("rtl: rel type record not supported; please report\n");
+  return false;
+}