From ae5fe7e6bca2874c5f1ef077204bb63124fb3db3 Mon Sep 17 00:00:00 2001
From: Chris Johns <chrisj@rtems.org>
Date: Sun, 26 Oct 2014 18:09:41 -0700
Subject: cpukit: Add libdl with the Runtime Loader (RTL) code.

This is a merge of the RTL project.
---
 cpukit/libdl/rtl-mdreloc-moxie.c | 88 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 88 insertions(+)
 create mode 100644 cpukit/libdl/rtl-mdreloc-moxie.c

(limited to 'cpukit/libdl/rtl-mdreloc-moxie.c')

diff --git a/cpukit/libdl/rtl-mdreloc-moxie.c b/cpukit/libdl/rtl-mdreloc-moxie.c
new file mode 100644
index 0000000000..284f68e260
--- /dev/null
+++ b/cpukit/libdl/rtl-mdreloc-moxie.c
@@ -0,0 +1,88 @@
+
+#include <sys/cdefs.h>
+
+#include <errno.h>
+#include <stdio.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+
+#include <rtems/rtl/rtl.h>
+#include "rtl-elf.h"
+#include "rtl-error.h"
+#include "rtl-trace.h"
+
+bool
+rtems_rtl_elf_rel_resolve_sym (Elf_Word type)
+{
+  return true;
+}
+
+bool
+rtems_rtl_elf_relocate_rela (const rtems_rtl_obj_t*      obj,
+                             const Elf_Rela*             rela,
+                             const rtems_rtl_obj_sect_t* sect,
+                             const char*                 symname,
+                             const Elf_Byte              syminfo,
+                             const Elf_Word              symvalue)
+{
+  Elf_Addr *where;
+  Elf_Sword tmp;
+
+  where = (Elf_Addr *)(sect->base + rela->r_offset);
+
+  /* Handle the not 4byte aligned address carefully */
+
+  switch (ELF_R_TYPE(rela->r_info)) {
+    case R_TYPE(NONE):
+      break;
+
+    case R_TYPE(32):
+      *(uint16_t *)where = ((symvalue + rela->r_addend) >> 16) & 0xffff;
+      *((uint16_t *)where + 1) = (symvalue + rela->r_addend) & 0xffff;
+
+      if (rtems_rtl_trace (RTEMS_RTL_TRACE_RELOC)) {
+          printf("*where 0x%04x%04x\n", *((uint16_t *)where + 1), *(uint16_t *)where);
+      }
+      break;
+
+    case R_TYPE(PCREL10):
+      /* beq, bge, bgeu, bgt, bgtu, ble, bleu, blt, bltu, bne */
+      if (rtems_rtl_trace (RTEMS_RTL_TRACE_RELOC)) {
+        printf("*where %x\n", *(uint16_t *)where);
+        printf("symvalue - where %x\n", (int)(symvalue - (Elf_Word)where));
+      }
+      tmp = (symvalue + rela->r_addend - ((Elf_Word)where + 2)); /* pc is the next instruction */
+      tmp = (Elf_Sword)tmp >> 1;
+      if (((Elf32_Sword)tmp > 0x1ff) || ((Elf32_Sword)tmp < -(Elf32_Sword)0x200)){
+        printf("Overflow for PCREL10: %d exceed -0x200:0x1ff\n", tmp);
+        return false;
+      }
+
+      *(uint16_t *)where = (*(uint16_t *)where & 0xfc00) | (tmp & 0x3ff);
+
+      if (rtems_rtl_trace (RTEMS_RTL_TRACE_RELOC)) {
+          printf("*where 0x%04x\n",  *(uint16_t *)where);
+      }
+
+      break;
+
+    default:
+      rtems_rtl_set_error (EINVAL, "rela type record not supported");
+      printf("Unsupported reloc types\n");
+      return false;
+  }
+
+  return true;
+}
+
+bool
+rtems_rtl_elf_relocate_rel (const rtems_rtl_obj_t*      obj,
+                            const Elf_Rel*              rel,
+                            const rtems_rtl_obj_sect_t* sect,
+                            const char*                 symname,
+                            const Elf_Byte              syminfo,
+                            const Elf_Word              symvalue)
+{
+  rtems_rtl_set_error (EINVAL, "rel type record not supported");
+  return false;
+}
-- 
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