1 files changed, 109 insertions, 0 deletions
diff --git a/grub-core/lib/i386/relocator_common_c.c b/grub-core/lib/i386/relocator_common_c.c
new file mode 100644
index 0000000..7be609b
--- /dev/null
+++ b/grub-core/lib/i386/relocator_common_c.c
@@ -0,0 +1,109 @@
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 2009-2013  Free Software Foundation, Inc.
+ *
+ *  GRUB is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  GRUB is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <grub/mm.h>
+#include <grub/misc.h>
+
+#include <grub/types.h>
+#include <grub/err.h>
+#include <grub/term.h>
+
+#include <grub/relocator.h>
+#include <grub/relocator_private.h>
+
+extern grub_uint8_t grub_relocator_forward_start;
+extern grub_uint8_t grub_relocator_forward_end;
+extern grub_uint8_t grub_relocator_backward_start;
+extern grub_uint8_t grub_relocator_backward_end;
+
+extern void *grub_relocator_backward_dest;
+extern void *grub_relocator_backward_src;
+extern grub_size_t grub_relocator_backward_chunk_size;
+
+extern void *grub_relocator_forward_dest;
+extern void *grub_relocator_forward_src;
+extern grub_size_t grub_relocator_forward_chunk_size;
+
+#define RELOCATOR_SIZEOF(x)	(&grub_relocator##x##_end - &grub_relocator##x##_start)
+
+grub_size_t grub_relocator_align = 1;
+grub_size_t grub_relocator_forward_size;
+grub_size_t grub_relocator_backward_size;
+#ifdef __x86_64__
+grub_size_t grub_relocator_jumper_size = 12;
+#else
+grub_size_t grub_relocator_jumper_size = 7;
+#endif
+
+void
+grub_cpu_relocator_init (void)
+{
+  grub_relocator_forward_size = RELOCATOR_SIZEOF (_forward);
+  grub_relocator_backward_size = RELOCATOR_SIZEOF (_backward);
+}
+
+void
+grub_cpu_relocator_jumper (void *rels, grub_addr_t addr)
+{
+  grub_uint8_t *ptr;
+  ptr = rels;
+#ifdef __x86_64__
+  /* movq imm64, %rax (for relocator) */
+  *(grub_uint8_t *) ptr = 0x48;
+  ptr++;
+  *(grub_uint8_t *) ptr = 0xb8;
+  ptr++;
+  *(grub_uint64_t *) ptr = addr;
+  ptr += sizeof (grub_uint64_t);
+#else
+  /* movl imm32, %eax (for relocator) */
+  *(grub_uint8_t *) ptr = 0xb8;
+  ptr++;
+  *(grub_uint32_t *) ptr = addr;
+  ptr += sizeof (grub_uint32_t);
+#endif
+  /* jmp $eax/$rax */
+  *(grub_uint8_t *) ptr = 0xff;
+  ptr++;
+  *(grub_uint8_t *) ptr = 0xe0;
+  ptr++;
+}
+
+void
+grub_cpu_relocator_backward (void *ptr, void *src, void *dest,
+			     grub_size_t size)
+{
+  grub_relocator_backward_dest = dest;
+  grub_relocator_backward_src = src;
+  grub_relocator_backward_chunk_size = size;
+
+  grub_memmove (ptr,
+		&grub_relocator_backward_start, RELOCATOR_SIZEOF (_backward));
+}
+
+void
+grub_cpu_relocator_forward (void *ptr, void *src, void *dest,
+			    grub_size_t size)
+{
+  grub_relocator_forward_dest = dest;
+  grub_relocator_forward_src = src;
+  grub_relocator_forward_chunk_size = size;
+
+  grub_memmove (ptr,
+		&grub_relocator_forward_start, RELOCATOR_SIZEOF (_forward));
+}