Machine dependant relocations for KLD.

1 files changed, 111 insertions, 0 deletions

diff --git a/sys/powerpc/powerpc/elf_machdep.c b/sys/powerpc/powerpc/elf_machdep.c
new file mode 100644
index 0000000..1e7c86d
--- /dev/null
+++ b/sys/powerpc/powerpc/elf_machdep.c
@@ -0,0 +1,111 @@
+/*-
+ * Copyright 1996-1998 John D. Polstra.
+ * 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.
+ *
+ * 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.
+ *
+ *      $Id$
+ */
+
+#include <sys/param.h>
+#include <sys/kernel.h>
+#include <sys/systm.h>
+#include <sys/malloc.h>
+#include <sys/proc.h>
+#include <sys/namei.h>
+#include <sys/fcntl.h>
+#include <sys/vnode.h>
+#include <sys/linker.h>
+#include <machine/elf.h>
+
+/* Process one elf relocation with addend. */
+int
+elf_reloc(linker_file_t lf, const Elf_Rela *rela, const char *sym)
+{
+	Elf_Addr relocbase = (Elf_Addr) lf->address;
+	Elf_Addr *where = (Elf_Addr *) (relocbase + rela->r_offset);
+
+	switch (ELF_R_TYPE(rela->r_info)) {
+
+		case R_ALPHA_REFQUAD: {
+			Elf_Addr addr;
+			Elf_Addr tmp_value;
+
+			addr = (Elf_Addr)
+				linker_file_lookup_symbol(lf, sym, 1);
+			if (addr == NULL)
+				return -1;
+
+			tmp_value = addr + *where + rela->r_addend;
+			if (*where != tmp_value)
+				*where = tmp_value;
+		}
+		break;
+
+		case R_ALPHA_GLOB_DAT: {
+			Elf_Addr addr;
+
+			addr = (Elf_Addr)
+				linker_file_lookup_symbol(lf, sym, 1);
+			if (addr == NULL)
+				return -1;
+
+			if (*where != addr)
+				*where = addr;
+		}
+		break;
+
+		case R_ALPHA_JMP_SLOT: {
+			/* No point in lazy binding for kernel modules. */
+			Elf_Addr addr;
+
+			addr = (Elf_Addr)
+				linker_file_lookup_symbol(lf, sym, 1);
+			if (addr == NULL)
+				return -1;
+			
+			if (*where != addr)
+				*where = addr;
+		}
+		break;
+
+		case R_ALPHA_RELATIVE: {
+			*where += relocbase;
+		}
+		break;
+
+		case R_ALPHA_COPY: {
+			/*
+			 * There shouldn't be copy relocations in kernel
+			 * objects.
+			 */
+			printf("kldload: unexpected R_COPY relocation\n");
+			return -1;
+		}
+		break;
+
+		default:
+			printf("kldload: unexpected relocation type %d\n",
+			       ELF_R_TYPE(rela->r_info));
+			return -1;
+	}
+	return(0);
+}