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;
++ 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 +43,114 @@ static struct mips_hi16 *mips_hi16_list;
+@@ -43,6 +43,116 @@ static struct mips_hi16 *mips_hi16_list;
static LIST_HEAD(dbe_list);
static DEFINE_SPINLOCK(dbe_lock);
+ * physically mapped memory to put the module into.
+ */
+static unsigned int
-+get_plt_size(const Elf32_Ehdr *hdr, const Elf32_Shdr *sechdrs,
++get_plt_size(const Elf_Ehdr *hdr, const Elf_Shdr *sechdrs,
+ const char *secstrings, unsigned int symindex, bool is_init)
+{
+ unsigned long ret = 0;
+ return ret;
+}
+
++#ifndef MODULE_START
+static void *alloc_phys(unsigned long size)
+{
+ unsigned order;
+
+ return page_address(page);
+}
++#endif
+
+static void free_phys(void *ptr, unsigned long size)
+{
void *module_alloc(unsigned long size)
{
#ifdef MODULE_START
-@@ -58,16 +166,41 @@ void *module_alloc(unsigned long size)
+@@ -58,23 +168,101 @@ void *module_alloc(unsigned long size)
return __vmalloc_area(area, GFP_KERNEL, PAGE_KERNEL);
#else
+ return vmalloc(size);
+
+ return ptr;
- #endif
- }
-
++#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)
{
/* FIXME: If module_region == mod->init_region, trim exception
table entries. */
}
-@@ -75,6 +208,24 @@ void module_free(struct module *mod, voi
+
++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)
{
+ 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)
++ 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;
}
-@@ -97,27 +248,44 @@ static int apply_r_mips_32_rela(struct m
+@@ -97,27 +285,37 @@ 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, unsigned size, Elf_Addr v)
++ void *start, Elf_Addr v)
{
- if (v % 4) {
- printk(KERN_ERR "module %s: dangerous relocation\n", me->name);
- me->name);
- return -ENOEXEC;
- }
-+ if (*plt_offset == size)
-+ return 0;
++ *plt_offset += 4 * sizeof(int);
- *location = (*location & ~0x03ffffff) |
- ((*location + (v >> 2)) & 0x03ffffff);
-+ *plt_offset += 4 * sizeof(int);
-+
+ /* adjust carry for addiu */
+ if (v & 0x00008000)
+ v += 0x10000;
-+
+
+- return 0;
+ 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;
-+}
-+
-+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->module_core, me->core_size, v);
-+
-+ if (location >= me->module_init &&
-+ location < me->module_init + me->init_size)
-+ return add_plt_entry_to(&me->arch.init_plt_offset,
-+ me->module_init, me->init_size, v);
-
- return 0;
}
-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) {
printk(KERN_ERR "module %s: dangerous relocation\n", me->name);
-@@ -125,17 +293,31 @@ static int apply_r_mips_26_rela(struct m
+@@ -125,17 +323,31 @@ static int apply_r_mips_26_rela(struct m
}
if ((v & 0xf0000000) != (((unsigned long)location + 4) & 0xf0000000)) {
static int apply_r_mips_hi16_rel(struct module *me, u32 *location, Elf_Addr v)
{
struct mips_hi16 *n;
-@@ -400,11 +582,23 @@ int module_finalize(const Elf_Ehdr *hdr,
+@@ -400,11 +612,32 @@ 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.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;
++ 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.plt_tbl)
-+ kfree(mod->arch.plt_tbl);
++ 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);
projects / openwrt.git / blobdiff