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Diffstat (limited to 'target/linux/sibyte/patches/106-no_module_reloc.patch')
-rw-r--r--target/linux/sibyte/patches/106-no_module_reloc.patch335
1 files changed, 335 insertions, 0 deletions
diff --git a/target/linux/sibyte/patches/106-no_module_reloc.patch b/target/linux/sibyte/patches/106-no_module_reloc.patch
new file mode 100644
index 0000000..833dea7
--- /dev/null
+++ b/target/linux/sibyte/patches/106-no_module_reloc.patch
@@ -0,0 +1,335 @@
+diff -urN linux-2.6.30.7/arch/mips/Makefile linux-2.6.30.7.new/arch/mips/Makefile
+--- linux-2.6.30.7/arch/mips/Makefile 2009-09-27 13:17:16.000000000 +0200
++++ linux-2.6.30.7.new/arch/mips/Makefile 2009-09-15 19:46:05.000000000 +0200
+@@ -83,7 +83,7 @@
+ cflags-y += -G 0 -mno-abicalls -fno-pic -pipe
+ cflags-y += -msoft-float
+ LDFLAGS_vmlinux += -G 0 -static -n -nostdlib
+-MODFLAGS += -mno-long-calls
++MODFLAGS += -mlong-calls
+
+ cflags-y += -ffreestanding
+
+diff -urN linux-2.6.30.7/arch/mips/include/asm/module.h linux-2.6.30.7.new/arch/mips/include/asm/module.h
+--- linux-2.6.30.7/arch/mips/include/asm/module.h 2009-09-27 13:17:16.000000000 +0200
++++ linux-2.6.30.7.new/arch/mips/include/asm/module.h 2009-09-15 19:46:05.000000000 +0200
+@@ -9,11 +9,6 @@
+ struct list_head dbe_list;
+ const struct exception_table_entry *dbe_start;
+ const struct exception_table_entry *dbe_end;
+-
+- void *plt_tbl;
+- unsigned int core_plt_offset;
+- unsigned int core_plt_size;
+- unsigned int init_plt_offset;
+ };
+
+ typedef uint8_t Elf64_Byte; /* Type for a 8-bit quantity. */
+diff -urN linux-2.6.30.7/arch/mips/kernel/module.c linux-2.6.30.7.new/arch/mips/kernel/module.c
+--- linux-2.6.30.7/arch/mips/kernel/module.c 2009-09-27 13:17:16.000000000 +0200
++++ linux-2.6.30.7.new/arch/mips/kernel/module.c 2009-09-15 19:46:05.000000000 +0200
+@@ -43,116 +43,6 @@
+ static LIST_HEAD(dbe_list);
+ static DEFINE_SPINLOCK(dbe_lock);
+
+-/*
+- * Get the potential max trampolines size required of the init and
+- * non-init sections. Only used if we cannot find enough contiguous
+- * physically mapped memory to put the module into.
+- */
+-static unsigned int
+-get_plt_size(const Elf_Ehdr *hdr, const Elf_Shdr *sechdrs,
+- const char *secstrings, unsigned int symindex, bool is_init)
+-{
+- unsigned long ret = 0;
+- unsigned int i, j;
+- Elf_Sym *syms;
+-
+- /* Everything marked ALLOC (this includes the exported symbols) */
+- for (i = 1; i < hdr->e_shnum; ++i) {
+- unsigned int info = sechdrs[i].sh_info;
+-
+- if (sechdrs[i].sh_type != SHT_REL
+- && sechdrs[i].sh_type != SHT_RELA)
+- continue;
+-
+- /* Not a valid relocation section? */
+- if (info >= hdr->e_shnum)
+- continue;
+-
+- /* Don't bother with non-allocated sections */
+- if (!(sechdrs[info].sh_flags & SHF_ALLOC))
+- continue;
+-
+- /* If it's called *.init*, and we're not init, we're
+- not interested */
+- if ((strstr(secstrings + sechdrs[i].sh_name, ".init") != 0)
+- != is_init)
+- continue;
+-
+- syms = (Elf_Sym *) sechdrs[symindex].sh_addr;
+- if (sechdrs[i].sh_type == SHT_REL) {
+- Elf_Mips_Rel *rel = (void *) sechdrs[i].sh_addr;
+- unsigned int size = sechdrs[i].sh_size / sizeof(*rel);
+-
+- for (j = 0; j < size; ++j) {
+- Elf_Sym *sym;
+-
+- if (ELF_MIPS_R_TYPE(rel[j]) != R_MIPS_26)
+- continue;
+-
+- sym = syms + ELF_MIPS_R_SYM(rel[j]);
+- if (!is_init && sym->st_shndx != SHN_UNDEF)
+- continue;
+-
+- ret += 4 * sizeof(int);
+- }
+- } else {
+- Elf_Mips_Rela *rela = (void *) sechdrs[i].sh_addr;
+- unsigned int size = sechdrs[i].sh_size / sizeof(*rela);
+-
+- for (j = 0; j < size; ++j) {
+- Elf_Sym *sym;
+-
+- if (ELF_MIPS_R_TYPE(rela[j]) != R_MIPS_26)
+- continue;
+-
+- sym = syms + ELF_MIPS_R_SYM(rela[j]);
+- if (!is_init && sym->st_shndx != SHN_UNDEF)
+- continue;
+-
+- ret += 4 * sizeof(int);
+- }
+- }
+- }
+-
+- return ret;
+-}
+-
+-#ifndef MODULE_START
+-static void *alloc_phys(unsigned long size)
+-{
+- unsigned order;
+- struct page *page;
+- struct page *p;
+-
+- size = PAGE_ALIGN(size);
+- order = get_order(size);
+-
+- page = alloc_pages(GFP_KERNEL | __GFP_NORETRY | __GFP_NOWARN |
+- __GFP_THISNODE, order);
+- if (!page)
+- return NULL;
+-
+- split_page(page, order);
+-
+- for (p = page + (size >> PAGE_SHIFT); p < page + (1 << order); ++p)
+- __free_page(p);
+-
+- return page_address(page);
+-}
+-#endif
+-
+-static void free_phys(void *ptr, unsigned long size)
+-{
+- struct page *page;
+- struct page *end;
+-
+- page = virt_to_page(ptr);
+- end = page + (PAGE_ALIGN(size) >> PAGE_SHIFT);
+-
+- for (; page < end; ++page)
+- __free_page(page);
+-}
+-
+ void *module_alloc(unsigned long size)
+ {
+ #ifdef MODULE_START
+@@ -168,45 +58,16 @@
+
+ return __vmalloc_area(area, GFP_KERNEL, PAGE_KERNEL);
+ #else
+- void *ptr;
+-
+ if (size == 0)
+ return NULL;
+-
+- ptr = alloc_phys(size);
+-
+- /* If we failed to allocate physically contiguous memory,
+- * fall back to regular vmalloc. The module loader code will
+- * create jump tables to handle long jumps */
+- if (!ptr)
+- return vmalloc(size);
+-
+- return ptr;
+-#endif
+-}
+-
+-static inline bool is_phys_addr(void *ptr)
+-{
+-#ifdef CONFIG_64BIT
+- return (KSEGX((unsigned long)ptr) == CKSEG0);
+-#else
+- return (KSEGX(ptr) == KSEG0);
++ return vmalloc(size);
+ #endif
+ }
+
+ /* Free memory returned from module_alloc */
+ void module_free(struct module *mod, void *module_region)
+ {
+- if (is_phys_addr(module_region)) {
+- if (mod->module_init == module_region)
+- free_phys(module_region, mod->init_size);
+- else if (mod->module_core == module_region)
+- free_phys(module_region, mod->core_size);
+- else
+- BUG();
+- } else {
+- vfree(module_region);
+- }
++ vfree(module_region);
+ /* FIXME: If module_region == mod->init_region, trim exception
+ table entries. */
+ }
+@@ -214,24 +75,6 @@
+ int module_frob_arch_sections(Elf_Ehdr *hdr, Elf_Shdr *sechdrs,
+ char *secstrings, struct module *mod)
+ {
+- unsigned int symindex = 0;
+- unsigned int core_size, init_size;
+- int i;
+-
+- for (i = 1; i < hdr->e_shnum; i++)
+- if (sechdrs[i].sh_type == SHT_SYMTAB)
+- symindex = i;
+-
+- core_size = get_plt_size(hdr, sechdrs, secstrings, symindex, false);
+- init_size = get_plt_size(hdr, sechdrs, secstrings, symindex, true);
+-
+- mod->arch.core_plt_offset = 0;
+- mod->arch.core_plt_size = core_size;
+- mod->arch.init_plt_offset = core_size;
+- mod->arch.plt_tbl = kmalloc(core_size + init_size, GFP_KERNEL);
+- if (!mod->arch.plt_tbl)
+- return -ENOMEM;
+-
+ return 0;
+ }
+
+@@ -254,41 +97,27 @@
+ return 0;
+ }
+
+-static Elf_Addr add_plt_entry_to(unsigned *plt_offset,
+- void *start, Elf_Addr v)
++static int apply_r_mips_26_rel(struct module *me, u32 *location, Elf_Addr v)
+ {
+- unsigned *tramp = start + *plt_offset;
+-
+- *plt_offset += 4 * sizeof(int);
+-
+- /* adjust carry for addiu */
+- if (v & 0x00008000)
+- v += 0x10000;
+-
+- tramp[0] = 0x3c190000 | (v >> 16); /* lui t9, hi16 */
+- tramp[1] = 0x27390000 | (v & 0xffff); /* addiu t9, t9, lo16 */
+- tramp[2] = 0x03200008; /* jr t9 */
+- tramp[3] = 0x00000000; /* nop */
+-
+- return (Elf_Addr) tramp;
+-}
++ if (v % 4) {
++ printk(KERN_ERR "module %s: dangerous relocation\n", me->name);
++ return -ENOEXEC;
++ }
+
+-static Elf_Addr add_plt_entry(struct module *me, void *location, Elf_Addr v)
+-{
+- if (location >= me->module_core &&
+- location < me->module_core + me->core_size)
+- return add_plt_entry_to(&me->arch.core_plt_offset,
+- me->arch.plt_tbl, v);
++ if ((v & 0xf0000000) != (((unsigned long)location + 4) & 0xf0000000)) {
++ printk(KERN_ERR
++ "module %s: relocation overflow\n",
++ me->name);
++ return -ENOEXEC;
++ }
+
+- if (location >= me->module_init &&
+- location < me->module_init + me->init_size)
+- return add_plt_entry_to(&me->arch.init_plt_offset,
+- me->arch.plt_tbl, v);
++ *location = (*location & ~0x03ffffff) |
++ ((*location + (v >> 2)) & 0x03ffffff);
+
+ return 0;
+ }
+
+-static int set_r_mips_26(struct module *me, u32 *location, u32 ofs, Elf_Addr v)
++static int apply_r_mips_26_rela(struct module *me, u32 *location, Elf_Addr v)
+ {
+ if (v % 4) {
+ printk(KERN_ERR "module %s: dangerous relocation\n", me->name);
+@@ -296,31 +125,17 @@
+ }
+
+ if ((v & 0xf0000000) != (((unsigned long)location + 4) & 0xf0000000)) {
+- v = add_plt_entry(me, location, v + (ofs << 2));
+- if (!v) {
+- printk(KERN_ERR
++ printk(KERN_ERR
+ "module %s: relocation overflow\n",
+ me->name);
+- return -ENOEXEC;
+- }
+- ofs = 0;
++ return -ENOEXEC;
+ }
+
+- *location = (*location & ~0x03ffffff) | ((ofs + (v >> 2)) & 0x03ffffff);
++ *location = (*location & ~0x03ffffff) | ((v >> 2) & 0x03ffffff);
+
+ return 0;
+ }
+
+-static int apply_r_mips_26_rel(struct module *me, u32 *location, Elf_Addr v)
+-{
+- return set_r_mips_26(me, location, *location & 0x03ffffff, v);
+-}
+-
+-static int apply_r_mips_26_rela(struct module *me, u32 *location, Elf_Addr v)
+-{
+- return set_r_mips_26(me, location, 0, v);
+-}
+-
+ static int apply_r_mips_hi16_rel(struct module *me, u32 *location, Elf_Addr v)
+ {
+ struct mips_hi16 *n;
+@@ -585,23 +400,11 @@
+ list_add(&me->arch.dbe_list, &dbe_list);
+ spin_unlock_irq(&dbe_lock);
+ }
+-
+- /* Get rid of the fixup trampoline if we're running the module
+- * from physically mapped address space */
+- if (me->arch.core_plt_offset == 0 &&
+- me->arch.init_plt_offset == me->arch.core_plt_size &&
+- is_phys_addr(me->module_core)) {
+- kfree(me->arch.plt_tbl);
+- me->arch.plt_tbl = NULL;
+- }
+-
+ return 0;
+ }
+
+ void module_arch_cleanup(struct module *mod)
+ {
+- if (mod->arch.plt_tbl)
+- kfree(mod->arch.plt_tbl);
+ spin_lock_irq(&dbe_lock);
+ list_del(&mod->arch.dbe_list);
+ spin_unlock_irq(&dbe_lock);
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