1 files changed, 213 insertions, 0 deletions

diff --git a/arch/sparc/kernel/module_64.c b/arch/sparc/kernel/module_64.c
new file mode 100644
index 000000000000..158484bf5999
--- /dev/null
+++ b/arch/sparc/kernel/module_64.c
@@ -0,0 +1,213 @@
+/* Kernel module help for sparc64.
+ *
+ * Copyright (C) 2001 Rusty Russell.
+ * Copyright (C) 2002 David S. Miller.
+ */
+
+#include <linux/moduleloader.h>
+#include <linux/kernel.h>
+#include <linux/elf.h>
+#include <linux/vmalloc.h>
+#include <linux/fs.h>
+#include <linux/string.h>
+#include <linux/slab.h>
+#include <linux/mm.h>
+
+#include <asm/processor.h>
+#include <asm/spitfire.h>
+
+static void *module_map(unsigned long size)
+{
+        struct vm_struct *area;
+
+        size = PAGE_ALIGN(size);
+        if (!size || size > MODULES_LEN)
+                return NULL;
+
+        area = __get_vm_area(size, VM_ALLOC, MODULES_VADDR, MODULES_END);
+        if (!area)
+                return NULL;
+
+        return __vmalloc_area(area, GFP_KERNEL, PAGE_KERNEL);
+}
+
+void *module_alloc(unsigned long size)
+{
+        void *ret;
+
+        /* We handle the zero case fine, unlike vmalloc */
+        if (size == 0)
+                return NULL;
+
+        ret = module_map(size);
+        if (!ret)
+                ret = ERR_PTR(-ENOMEM);
+        else
+                memset(ret, 0, size);
+
+        return ret;
+}
+
+/* Free memory returned from module_core_alloc/module_init_alloc */
+void module_free(struct module *mod, void *module_region)
+{
+        vfree(module_region);
+        /* FIXME: If module_region == mod->init_region, trim exception
+           table entries. */
+}
+
+/* Make generic code ignore STT_REGISTER dummy undefined symbols.  */
+int module_frob_arch_sections(Elf_Ehdr *hdr,
+                              Elf_Shdr *sechdrs,
+                              char *secstrings,
+                              struct module *mod)
+{
+        unsigned int symidx;
+        Elf64_Sym *sym;
+        const char *strtab;
+        int i;
+
+        for (symidx = 0; sechdrs[symidx].sh_type != SHT_SYMTAB; symidx++) {
+                if (symidx == hdr->e_shnum-1) {
+                        printk("%s: no symtab found.\n", mod->name);
+                        return -ENOEXEC;
+                }
+        }
+        sym = (Elf64_Sym *)sechdrs[symidx].sh_addr;
+        strtab = (char *)sechdrs[sechdrs[symidx].sh_link].sh_addr;
+
+        for (i = 1; i < sechdrs[symidx].sh_size / sizeof(Elf_Sym); i++) {
+                if (sym[i].st_shndx == SHN_UNDEF &&
+                    ELF64_ST_TYPE(sym[i].st_info) == STT_REGISTER)
+                        sym[i].st_shndx = SHN_ABS;
+        }
+        return 0;
+}
+
+int apply_relocate(Elf64_Shdr *sechdrs,
+                   const char *strtab,
+                   unsigned int symindex,
+                   unsigned int relsec,
+                   struct module *me)
+{
+        printk(KERN_ERR "module %s: non-ADD RELOCATION unsupported\n",
+               me->name);
+        return -ENOEXEC;
+}
+
+int apply_relocate_add(Elf64_Shdr *sechdrs,
+                       const char *strtab,
+                       unsigned int symindex,
+                       unsigned int relsec,
+                       struct module *me)
+{
+        unsigned int i;
+        Elf64_Rela *rel = (void *)sechdrs[relsec].sh_addr;
+        Elf64_Sym *sym;
+        u8 *location;
+        u32 *loc32;
+
+        for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rel); i++) {
+                Elf64_Addr v;
+
+                /* This is where to make the change */
+                location = (u8 *)sechdrs[sechdrs[relsec].sh_info].sh_addr
+                        + rel[i].r_offset;
+                loc32 = (u32 *) location;
+
+                BUG_ON(((u64)location >> (u64)32) != (u64)0);
+
+                /* This is the symbol it is referring to.  Note that all
+                   undefined symbols have been resolved.  */
+                sym = (Elf64_Sym *)sechdrs[symindex].sh_addr
+                        + ELF64_R_SYM(rel[i].r_info);
+                v = sym->st_value + rel[i].r_addend;
+
+                switch (ELF64_R_TYPE(rel[i].r_info) & 0xff) {
+                case R_SPARC_64:
+                        location[0] = v >> 56;
+                        location[1] = v >> 48;
+                        location[2] = v >> 40;
+                        location[3] = v >> 32;
+                        location[4] = v >> 24;
+                        location[5] = v >> 16;
+                        location[6] = v >>  8;
+                        location[7] = v >>  0;
+                        break;
+
+                case R_SPARC_32:
+                        location[0] = v >> 24;
+                        location[1] = v >> 16;
+                        location[2] = v >>  8;
+                        location[3] = v >>  0;
+                        break;
+
+                case R_SPARC_DISP32:
+                        v -= (Elf64_Addr) location;
+                        *loc32 = v;
+                        break;
+
+                case R_SPARC_WDISP30:
+                        v -= (Elf64_Addr) location;
+                        *loc32 = (*loc32 & ~0x3fffffff) |
+                                ((v >> 2) & 0x3fffffff);
+                        break;
+
+                case R_SPARC_WDISP22:
+                        v -= (Elf64_Addr) location;
+                        *loc32 = (*loc32 & ~0x3fffff) |
+                                ((v >> 2) & 0x3fffff);
+                        break;
+
+                case R_SPARC_WDISP19:
+                        v -= (Elf64_Addr) location;
+                        *loc32 = (*loc32 & ~0x7ffff) |
+                                ((v >> 2) & 0x7ffff);
+                        break;
+
+                case R_SPARC_LO10:
+                        *loc32 = (*loc32 & ~0x3ff) | (v & 0x3ff);
+                        break;
+
+                case R_SPARC_HI22:
+                        *loc32 = (*loc32 & ~0x3fffff) |
+                                ((v >> 10) & 0x3fffff);
+                        break;
+
+                case R_SPARC_OLO10:
+                        *loc32 = (*loc32 & ~0x1fff) |
+                                (((v & 0x3ff) +
+                                  (ELF64_R_TYPE(rel[i].r_info) >> 8))
+                                 & 0x1fff);
+                        break;
+
+                default:
+                        printk(KERN_ERR "module %s: Unknown relocation: %x\n",
+                               me->name,
+                               (int) (ELF64_R_TYPE(rel[i].r_info) & 0xff));
+                        return -ENOEXEC;
+                };
+        }
+        return 0;
+}
+
+int module_finalize(const Elf_Ehdr *hdr,
+                    const Elf_Shdr *sechdrs,
+                    struct module *me)
+{
+        /* Cheetah's I-cache is fully coherent.  */
+        if (tlb_type == spitfire) {
+                unsigned long va;
+
+                flushw_all();
+                for (va =  0; va < (PAGE_SIZE << 1); va += 32)
+                        spitfire_put_icache_tag(va, 0x0);
+                __asm__ __volatile__("flush %g6");
+        }
+
+        return 0;
+}
+
+void module_arch_cleanup(struct module *mod)
+{
+}