summaryrefslogtreecommitdiff
path: root/arch/score/kernel/module.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/score/kernel/module.c')
-rw-r--r--arch/score/kernel/module.c165
1 files changed, 165 insertions, 0 deletions
diff --git a/arch/score/kernel/module.c b/arch/score/kernel/module.c
new file mode 100644
index 000000000000..4de8d47becd3
--- /dev/null
+++ b/arch/score/kernel/module.c
@@ -0,0 +1,165 @@
+/*
+ * arch/score/kernel/module.c
+ *
+ * Score Processor version.
+ *
+ * Copyright (C) 2009 Sunplus Core Technology Co., Ltd.
+ * Chen Liqin <liqin.chen@sunplusct.com>
+ * Lennox Wu <lennox.wu@sunplusct.com>
+ *
+ * This program 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 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 this program; if not, see the file COPYING, or write
+ * to the Free Software Foundation, Inc.,
+ * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <linux/moduleloader.h>
+#include <linux/module.h>
+#include <linux/vmalloc.h>
+
+void *module_alloc(unsigned long size)
+{
+ return size ? vmalloc(size) : NULL;
+}
+
+/* Free memory returned from module_alloc */
+void module_free(struct module *mod, void *module_region)
+{
+ vfree(module_region);
+}
+
+int module_frob_arch_sections(Elf_Ehdr *hdr, Elf_Shdr *sechdrs,
+ char *secstrings, struct module *mod)
+{
+ return 0;
+}
+
+int apply_relocate(Elf_Shdr *sechdrs, const char *strtab,
+ unsigned int symindex, unsigned int relindex,
+ struct module *me)
+{
+ Elf32_Shdr *symsec = sechdrs + symindex;
+ Elf32_Shdr *relsec = sechdrs + relindex;
+ Elf32_Shdr *dstsec = sechdrs + relsec->sh_info;
+ Elf32_Rel *rel = (void *)relsec->sh_addr;
+ unsigned int i;
+
+ for (i = 0; i < relsec->sh_size / sizeof(Elf32_Rel); i++, rel++) {
+ unsigned long loc;
+ Elf32_Sym *sym;
+ s32 r_offset;
+
+ r_offset = ELF32_R_SYM(rel->r_info);
+ if ((r_offset < 0) ||
+ (r_offset > (symsec->sh_size / sizeof(Elf32_Sym)))) {
+ printk(KERN_ERR "%s: bad relocation, section %d reloc %d\n",
+ me->name, relindex, i);
+ return -ENOEXEC;
+ }
+
+ sym = ((Elf32_Sym *)symsec->sh_addr) + r_offset;
+
+ if ((rel->r_offset < 0) ||
+ (rel->r_offset > dstsec->sh_size - sizeof(u32))) {
+ printk(KERN_ERR "%s: out of bounds relocation, "
+ "section %d reloc %d offset %d size %d\n",
+ me->name, relindex, i, rel->r_offset,
+ dstsec->sh_size);
+ return -ENOEXEC;
+ }
+
+ loc = dstsec->sh_addr + rel->r_offset;
+ switch (ELF32_R_TYPE(rel->r_info)) {
+ case R_SCORE_NONE:
+ break;
+ case R_SCORE_ABS32:
+ *(unsigned long *)loc += sym->st_value;
+ break;
+ case R_SCORE_HI16:
+ break;
+ case R_SCORE_LO16: {
+ unsigned long hi16_offset, offset;
+ unsigned long uvalue;
+ unsigned long temp, temp_hi;
+ temp_hi = *((unsigned long *)loc - 1);
+ temp = *(unsigned long *)loc;
+
+ hi16_offset = (((((temp_hi) >> 16) & 0x3) << 15) |
+ ((temp_hi) & 0x7fff)) >> 1;
+ offset = ((temp >> 16 & 0x03) << 15) |
+ ((temp & 0x7fff) >> 1);
+ offset = (hi16_offset << 16) | (offset & 0xffff);
+ uvalue = sym->st_value + offset;
+ hi16_offset = (uvalue >> 16) << 1;
+
+ temp_hi = ((temp_hi) & (~(0x37fff))) |
+ (hi16_offset & 0x7fff) |
+ ((hi16_offset << 1) & 0x30000);
+ *((unsigned long *)loc - 1) = temp_hi;
+
+ offset = (uvalue & 0xffff) << 1;
+ temp = (temp & (~(0x37fff))) | (offset & 0x7fff) |
+ ((offset << 1) & 0x30000);
+ *(unsigned long *)loc = temp;
+ break;
+ }
+ case R_SCORE_24: {
+ unsigned long hi16_offset, offset;
+ unsigned long uvalue;
+ unsigned long temp;
+
+ temp = *(unsigned long *)loc;
+ offset = (temp & 0x03FF7FFE);
+ hi16_offset = (offset & 0xFFFF0000);
+ offset = (hi16_offset | ((offset & 0xFFFF) << 1)) >> 2;
+
+ uvalue = (sym->st_value + offset) >> 1;
+ uvalue = uvalue & 0x00ffffff;
+
+ temp = (temp & 0xfc008001) |
+ ((uvalue << 2) & 0x3ff0000) |
+ ((uvalue & 0x3fff) << 1);
+ *(unsigned long *)loc = temp;
+ break;
+ }
+ default:
+ printk(KERN_ERR "%s: unknown relocation: %u\n",
+ me->name, ELF32_R_TYPE(rel->r_info));
+ return -ENOEXEC;
+ }
+ }
+
+ return 0;
+}
+
+int apply_relocate_add(Elf_Shdr *sechdrs, const char *strtab,
+ unsigned int symindex, unsigned int relsec,
+ struct module *me)
+{
+ return 0;
+}
+
+/* Given an address, look for it in the module exception tables. */
+const struct exception_table_entry *search_module_dbetables(unsigned long addr)
+{
+ return NULL;
+}
+
+/* Put in dbe list if necessary. */
+int module_finalize(const Elf_Ehdr *hdr, const Elf_Shdr *sechdrs,
+ struct module *me)
+{
+ return 0;
+}
+
+void module_arch_cleanup(struct module *mod) {}