linux/2.6.36: R.I.P.

SVN-Revision: 31519

1 files changed, 0 insertions, 370 deletions

diff --git a/target/linux/generic/patches-2.6.36/027-mips_module_reloc.patch b/target/linux/generic/patches-2.6.36/027-mips_module_reloc.patch
deleted file mode 100644
index 0039be5..0000000
--- a/target/linux/generic/patches-2.6.36/027-mips_module_reloc.patch
+++ /dev/null
@@ -1,370 +0,0 @@
---- a/arch/mips/Makefile
-+++ b/arch/mips/Makefile
-@@ -93,8 +93,8 @@ all-$(CONFIG_SYS_SUPPORTS_ZBOOT)+= vmlin
- cflags-y			+= -G 0 -mno-abicalls -fno-pic -pipe
- cflags-y			+= -msoft-float
- LDFLAGS_vmlinux			+= -G 0 -static -n -nostdlib
--KBUILD_AFLAGS_MODULE		+= -mlong-calls
--KBUILD_CFLAGS_MODULE		+= -mlong-calls
-+KBUILD_AFLAGS_MODULE		+= -mno-long-calls
-+KBUILD_CFLAGS_MODULE		+= -mno-long-calls
- 
- cflags-y += -ffreestanding
- 
---- a/arch/mips/include/asm/module.h
-+++ b/arch/mips/include/asm/module.h
-@@ -9,6 +9,11 @@ struct mod_arch_specific {
- 	struct list_head dbe_list;
- 	const struct exception_table_entry *dbe_start;
- 	const struct exception_table_entry *dbe_end;
-+
-+	void *phys_plt_tbl;
-+	void *virt_plt_tbl;
-+	unsigned int phys_plt_offset;
-+	unsigned int virt_plt_offset;
- };
- 
- typedef uint8_t Elf64_Byte;		/* Type for a 8-bit quantity.  */
---- a/arch/mips/kernel/module.c
-+++ b/arch/mips/kernel/module.c
-@@ -43,6 +43,117 @@ static struct mips_hi16 *mips_hi16_list;
- 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
-@@ -58,21 +169,99 @@ void *module_alloc(unsigned long size)
- 
- 	return __vmalloc_area(area, GFP_KERNEL, PAGE_KERNEL);
- #else
-+	void *ptr;
-+
- 	if (size == 0)
- 		return NULL;
--	return vmalloc(size);
-+
-+	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);
- #endif
- }
- 
- /* Free memory returned from module_alloc */
- void module_free(struct module *mod, void *module_region)
- {
--	vfree(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);
-+	}
-+}
-+
-+static void *__module_alloc(int size, bool phys)
-+{
-+	void *ptr;
-+
-+	if (phys)
-+		ptr = kmalloc(size, GFP_KERNEL);
-+	else
-+		ptr = vmalloc(size);
-+	return ptr;
-+}
-+
-+static void __module_free(void *ptr)
-+{
-+	if (is_phys_addr(ptr))
-+		kfree(ptr);
-+	else
-+		vfree(ptr);
- }
- 
- 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.phys_plt_offset = 0;
-+	mod->arch.virt_plt_offset = 0;
-+	mod->arch.phys_plt_tbl = NULL;
-+	mod->arch.virt_plt_tbl = NULL;
-+
-+	if ((core_size + init_size) == 0)
-+		return 0;
-+
-+	mod->arch.phys_plt_tbl = __module_alloc(core_size + init_size, 1);
-+	if (!mod->arch.phys_plt_tbl)
-+		return -ENOMEM;
-+
-+	mod->arch.virt_plt_tbl = __module_alloc(core_size + init_size, 0);
-+	if (!mod->arch.virt_plt_tbl) {
-+		__module_free(mod->arch.phys_plt_tbl);
-+		mod->arch.phys_plt_tbl = NULL;
-+		return -ENOMEM;
-+	}
-+
- 	return 0;
- }
- 
-@@ -95,28 +284,36 @@ static int apply_r_mips_32_rela(struct m
- 	return 0;
- }
- 
--static int apply_r_mips_26_rel(struct module *me, u32 *location, Elf_Addr v)
-+static Elf_Addr add_plt_entry_to(unsigned *plt_offset,
-+				 void *start, Elf_Addr v)
- {
--	if (v % 4) {
--		pr_err("module %s: dangerous R_MIPS_26 REL relocation\n",
--		       me->name);
--		return -ENOEXEC;
--	}
-+	unsigned *tramp = start + *plt_offset;
-+	*plt_offset += 4 * sizeof(int);
- 
--	if ((v & 0xf0000000) != (((unsigned long)location + 4) & 0xf0000000)) {
--		printk(KERN_ERR
--		       "module %s: relocation overflow\n",
--		       me->name);
--		return -ENOEXEC;
--	}
-+	/* adjust carry for addiu */
-+	if (v & 0x00008000)
-+		v += 0x10000;
- 
--	*location = (*location & ~0x03ffffff) |
--	            ((*location + (v >> 2)) & 0x03ffffff);
-+	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 0;
-+	return (Elf_Addr) tramp;
- }
- 
--static int apply_r_mips_26_rela(struct module *me, u32 *location, Elf_Addr v)
-+static Elf_Addr add_plt_entry(struct module *me, void *location, Elf_Addr v)
-+{
-+	if (is_phys_addr(location))
-+		return add_plt_entry_to(&me->arch.phys_plt_offset,
-+				me->arch.phys_plt_tbl, v);
-+	else
-+		return add_plt_entry_to(&me->arch.virt_plt_offset,
-+				me->arch.virt_plt_tbl, v);
-+
-+}
-+
-+static int set_r_mips_26(struct module *me, u32 *location, u32 ofs, Elf_Addr v)
- {
- 	if (v % 4) {
- 		pr_err("module %s: dangerous R_MIPS_26 RELArelocation\n",
-@@ -125,17 +322,31 @@ static int apply_r_mips_26_rela(struct m
- 	}
- 
- 	if ((v & 0xf0000000) != (((unsigned long)location + 4) & 0xf0000000)) {
--		printk(KERN_ERR
-+	    v = add_plt_entry(me, location, v + (ofs << 2));
-+		if (!v) {
-+			printk(KERN_ERR
- 		       "module %s: relocation overflow\n",
- 		       me->name);
--		return -ENOEXEC;
-+			return -ENOEXEC;
-+		}
-+		ofs = 0;
- 	}
- 
--	*location = (*location & ~0x03ffffff) | ((v >> 2) & 0x03ffffff);
-+	*location = (*location & ~0x03ffffff) | ((ofs + (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;
-@@ -400,11 +611,32 @@ int module_finalize(const Elf_Ehdr *hdr,
- 		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.phys_plt_offset == 0) {
-+		__module_free(me->arch.phys_plt_tbl);
-+		me->arch.phys_plt_tbl = NULL;
-+	}
-+	if (me->arch.virt_plt_offset == 0) {
-+		__module_free(me->arch.virt_plt_tbl);
-+		me->arch.virt_plt_tbl = NULL;
-+	}
-+
- 	return 0;
- }
- 
- void module_arch_cleanup(struct module *mod)
- {
-+	if (mod->arch.phys_plt_tbl) {
-+		__module_free(mod->arch.phys_plt_tbl);
-+		mod->arch.phys_plt_tbl = NULL;
-+	}
-+	if (mod->arch.virt_plt_tbl) {
-+		__module_free(mod->arch.virt_plt_tbl);
-+		mod->arch.virt_plt_tbl = NULL;
-+	}
-+
- 	spin_lock_irq(&dbe_lock);
- 	list_del(&mod->arch.dbe_list);
- 	spin_unlock_irq(&dbe_lock);