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openwrtv4/target/linux/octeon/patches/106-no_module_reloc.patch
Florian Fainelli 7b5f0de029 refresh no_module_reloc.patch for mips64 targets 
SVN-Revision: 19382
2010-01-29 18:07:38 +00:00

372 lines
9.6 KiB
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diff -urN linux-2.6.30.10/arch/mips/Makefile linux-2.6.30.10.new//arch/mips/Makefile
--- linux-2.6.30.10/arch/mips/Makefile 2010-01-29 16:12:01.000000000 +0100
+++ linux-2.6.30.10.new//arch/mips/Makefile 2009-12-04 07:00:07.000000000 +0100
@@ -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-2.6.30.10/arch/mips/include/asm/module.h linux-2.6.30.10.new//arch/mips/include/asm/module.h
--- linux-2.6.30.10/arch/mips/include/asm/module.h 2010-01-29 16:12:01.000000000 +0100
+++ linux-2.6.30.10.new//arch/mips/include/asm/module.h 2009-12-04 07:00:07.000000000 +0100
@@ -9,11 +9,6 @@
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. */
diff -urN linux-2.6.30.10/arch/mips/kernel/module.c linux-2.6.30.10.new//arch/mips/kernel/module.c
--- linux-2.6.30.10/arch/mips/kernel/module.c 2010-01-29 16:12:01.000000000 +0100
+++ linux-2.6.30.10.new//arch/mips/kernel/module.c 2009-12-04 07:00:07.000000000 +0100
@@ -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
@@ -168,101 +58,23 @@
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. */
}
-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;
}
@@ -285,37 +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 */
+ if (v % 4) {
+ printk(KERN_ERR "module %s: dangerous relocation\n", me->name);
+ return -ENOEXEC;
+ }
- return (Elf_Addr) tramp;
-}
+ if ((v & 0xf0000000) != (((unsigned long)location + 4) & 0xf0000000)) {
+ printk(KERN_ERR
+ "module %s: relocation overflow\n",
+ me->name);
+ return -ENOEXEC;
+ }
-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);
+ *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);
@@ -323,31 +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;
@@ -612,32 +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.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);
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