[kernel] revert the 027-mips_module_reloc.patch patch for mips64 targets until we...
authorflorian <florian@3c298f89-4303-0410-b956-a3cf2f4a3e73>
Sun, 29 Nov 2009 00:31:21 +0000 (00:31 +0000)
committerflorian <florian@3c298f89-4303-0410-b956-a3cf2f4a3e73>
Sun, 29 Nov 2009 00:31:21 +0000 (00:31 +0000)
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@18593 3c298f89-4303-0410-b956-a3cf2f4a3e73

target/linux/cobalt/patches/001-no_module_reloc.patch [new file with mode: 0644]
target/linux/octeon/patches/106-no_module_reloc.patch [new file with mode: 0644]
target/linux/sibyte/patches/106-no_module_reloc.patch [new file with mode: 0644]

diff --git a/target/linux/cobalt/patches/001-no_module_reloc.patch b/target/linux/cobalt/patches/001-no_module_reloc.patch
new file mode 100644 (file)
index 0000000..833dea7
--- /dev/null
@@ -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);
diff --git a/target/linux/octeon/patches/106-no_module_reloc.patch b/target/linux/octeon/patches/106-no_module_reloc.patch
new file mode 100644 (file)
index 0000000..833dea7
--- /dev/null
@@ -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);
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 (file)
index 0000000..833dea7
--- /dev/null
@@ -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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