1 files changed, 104 insertions, 0 deletions
diff --git a/arch/sh/kernel/module.c b/arch/sh/kernel/module.c
new file mode 100644
index 000000000..b9cee98a7
--- /dev/null
+++ b/arch/sh/kernel/module.c
@@ -0,0 +1,104 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*  Kernel module help for SH.
+
+    SHcompact version by Kaz Kojima and Paul Mundt.
+
+    SHmedia bits:
+
+	Copyright 2004 SuperH (UK) Ltd
+	Author: Richard Curnow
+
+	Based on the sh version, and on code from the sh64-specific parts of
+	modutils, originally written by Richard Curnow and Ben Gaster.
+*/
+#include <linux/moduleloader.h>
+#include <linux/elf.h>
+#include <linux/vmalloc.h>
+#include <linux/bug.h>
+#include <linux/fs.h>
+#include <linux/string.h>
+#include <linux/kernel.h>
+#include <asm/unaligned.h>
+#include <asm/dwarf.h>
+
+int apply_relocate_add(Elf32_Shdr *sechdrs,
+		   const char *strtab,
+		   unsigned int symindex,
+		   unsigned int relsec,
+		   struct module *me)
+{
+	unsigned int i;
+	Elf32_Rela *rel = (void *)sechdrs[relsec].sh_addr;
+	Elf32_Sym *sym;
+	Elf32_Addr relocation;
+	uint32_t *location;
+	uint32_t value;
+
+	pr_debug("Applying relocate section %u to %u\n", relsec,
+		 sechdrs[relsec].sh_info);
+	for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rel); i++) {
+		/* This is where to make the change */
+		location = (void *)sechdrs[sechdrs[relsec].sh_info].sh_addr
+			+ rel[i].r_offset;
+		/* This is the symbol it is referring to.  Note that all
+		   undefined symbols have been resolved.  */
+		sym = (Elf32_Sym *)sechdrs[symindex].sh_addr
+			+ ELF32_R_SYM(rel[i].r_info);
+		relocation = sym->st_value + rel[i].r_addend;
+
+		switch (ELF32_R_TYPE(rel[i].r_info)) {
+		case R_SH_NONE:
+			break;
+		case R_SH_DIR32:
+			value = get_unaligned(location);
+			value += relocation;
+			put_unaligned(value, location);
+			break;
+		case R_SH_REL32:
+			relocation = (relocation - (Elf32_Addr) location);
+			value = get_unaligned(location);
+			value += relocation;
+			put_unaligned(value, location);
+			break;
+		case R_SH_IMM_LOW16:
+			*location = (*location & ~0x3fffc00) |
+				((relocation & 0xffff) << 10);
+			break;
+		case R_SH_IMM_MEDLOW16:
+			*location = (*location & ~0x3fffc00) |
+				(((relocation >> 16) & 0xffff) << 10);
+			break;
+		case R_SH_IMM_LOW16_PCREL:
+			relocation -= (Elf32_Addr) location;
+			*location = (*location & ~0x3fffc00) |
+				((relocation & 0xffff) << 10);
+			break;
+		case R_SH_IMM_MEDLOW16_PCREL:
+			relocation -= (Elf32_Addr) location;
+			*location = (*location & ~0x3fffc00) |
+				(((relocation >> 16) & 0xffff) << 10);
+			break;
+		default:
+			printk(KERN_ERR "module %s: Unknown relocation: %u\n",
+			       me->name, ELF32_R_TYPE(rel[i].r_info));
+			return -ENOEXEC;
+		}
+	}
+	return 0;
+}
+
+int module_finalize(const Elf_Ehdr *hdr,
+		    const Elf_Shdr *sechdrs,
+		    struct module *me)
+{
+	int ret = 0;
+
+	ret |= module_dwarf_finalize(hdr, sechdrs, me);
+
+	return ret;
+}
+
+void module_arch_cleanup(struct module *mod)
+{
+	module_dwarf_cleanup(mod);
+}