Add support for 64 bit MIPS

This is a patch to add support for 64-bit MIPS.

Signed-off-by: Hev heiher <heiher@users.sf.net>
Signed-off-by: Nigel Croxon <noxorc@mac.com>

1 files changed, 115 insertions, 0 deletions

diff --git a/gnuefi/reloc_mips64el.c b/gnuefi/reloc_mips64el.c
new file mode 100644
index 0000000..4db21ad
--- /dev/null
+++ b/gnuefi/reloc_mips64el.c
@@ -0,0 +1,115 @@
+/* reloc_mips64el.c - position independent MIPS64 ELF shared object relocator
+   Copyright (C) 2014 Linaro Ltd. <ard.biesheuvel@linaro.org>
+   Copyright (C) 1999 Hewlett-Packard Co.
+	Contributed by David Mosberger <davidm@hpl.hp.com>.
+   Copyright (C) 2017 Lemote Co.
+	Contributed by Heiher <r@hev.cc>
+
+    All rights reserved.
+
+    Redistribution and use in source and binary forms, with or without
+    modification, are permitted provided that the following conditions
+    are met:
+
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+    * 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.
+    * Neither the name of Hewlett-Packard Co. 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 ANYDIRECT, 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 <efi.h>
+#include <efilib.h>
+
+#include <elf.h>
+
+EFI_STATUS _relocate (long ldbase, Elf64_Dyn *dyn,
+		      EFI_HANDLE image EFI_UNUSED,
+		      EFI_SYSTEM_TABLE *systab EFI_UNUSED)
+{
+	long relsz = 0, relent = 0, gotsz = 0;
+	Elf64_Rel *rel = 0;
+	unsigned long *addr = 0;
+	int i;
+
+	for (i = 0; dyn[i].d_tag != DT_NULL; ++i) {
+		switch (dyn[i].d_tag) {
+			case DT_REL:
+				rel = (Elf64_Rel*)
+					((unsigned long)dyn[i].d_un.d_ptr
+					 + ldbase);
+				break;
+
+			case DT_RELSZ:
+				relsz = dyn[i].d_un.d_val;
+				break;
+
+			case DT_RELENT:
+				relent = dyn[i].d_un.d_val;
+				break;
+
+			case DT_PLTGOT:
+				addr = (unsigned long *)
+					((unsigned long)dyn[i].d_un.d_ptr
+					 + ldbase);
+				break;
+
+			case DT_MIPS_LOCAL_GOTNO:
+				gotsz = dyn[i].d_un.d_val;
+				break;
+
+			default:
+				break;
+		}
+	}
+
+	if ((!rel && relent == 0) && (!addr && gotsz == 0))
+		return EFI_SUCCESS;
+
+	if ((!rel && relent != 0) || (!addr && gotsz != 0))
+		return EFI_LOAD_ERROR;
+
+	while (gotsz > 0) {
+		*addr += ldbase;
+		addr += 1;
+		gotsz --;
+	}
+
+	while (relsz > 0) {
+		/* apply the relocs */
+		switch (ELF64_R_TYPE (swap_uint64 (rel->r_info))) {
+			case R_MIPS_NONE:
+				break;
+
+			case (R_MIPS_64 << 8) | R_MIPS_REL32:
+				addr = (unsigned long *)
+					(ldbase + rel->r_offset);
+				*addr += ldbase;
+				break;
+
+			default:
+				break;
+		}
+		rel = (Elf64_Rel*) ((char *) rel + relent);
+		relsz -= relent;
+	}
+	return EFI_SUCCESS;
+}