ppc64: 2.5 module support, from Rusty

arch/ppc64/kernel/Makefile

@@ -6,7 +6,7 @@ EXTRA_CFLAGS	+= -mno-minimal-toc
 EXTRA_TARGETS	:= head.o
 export-objs	:= ppc_ksyms.o
 
-obj-y               :=	ppc_ksyms.o setup.o entry.o traps.o irq.o idle.o \
+obj-y               :=	setup.o entry.o traps.o irq.o idle.o \
 			time.o process.o signal.o syscalls.o misc.o ptrace.o \
 			align.o semaphore.o bitops.o stab.o htab.o pacaData.o \
 			udbg.o binfmt_elf32.o sys_ppc32.o sys32.o ioctl32.o \
@@ -30,3 +30,4 @@ obj-y			  += open_pic.o xics.o pSeries_htab.o rtas.o \
 obj-$(CONFIG_RTAS_FLASH)	+= rtas_flash.o
 obj-$(CONFIG_SMP)		+= smp.o
 obj-$(CONFIG_PROFILING)		+= profile.o
+obj-$(CONFIG_MODULES)		+= module.o ppc_ksyms.o

arch/ppc64/kernel/ioctl32.c

@@ -4495,10 +4495,9 @@ int register_ioctl32_conversion(unsigned int cmd, int (*handler)(unsigned int, u
 {
 	int i;
 	if (!additional_ioctls) {
-		additional_ioctls = module_map(PAGE_SIZE);
+		additional_ioctls = get_zeroed_page(GFP_KERNEL);
 		if (!additional_ioctls)
 			return -ENOMEM;
-		memset(additional_ioctls, 0, PAGE_SIZE);
 	}
 	for (i = 0; i < PAGE_SIZE/sizeof(struct ioctl_trans); i++) {
 		if (!additional_ioctls[i].cmd)

arch/ppc64/kernel/module.c

+/*  Kernel module help for PPC64.
+    Copyright (C) 2001, 2003 Rusty Russell IBM Corporation.
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+*/
+#include <linux/module.h>
+#include <linux/elf.h>
+#include <linux/moduleloader.h>
+#include <linux/err.h>
+#include <linux/vmalloc.h>
+
+/* FIXME: We don't do .init separately.  To do this, we'd need to have
+   a separate r2 value in the init and core section, and stub between
+   them, too.
+
+   Using a magic allocator which places modules within 32MB solves
+   this, and makes other things simpler.  Anton?
+   --RR.  */
+#if 0
+#define DEBUGP printk
+#else
+#define DEBUGP(fmt , ...)
+#endif
+
+/* There's actually a third entry here, but it's unused */
+struct ppc64_opd_entry
+{
+	unsigned long funcaddr;
+	unsigned long r2;
+};
+
+/* Like PPC32, we need little trampolines to do > 24-bit jumps (into
+   the kernel itself).  But on PPC64, these need to be used for every
+   jump, actually, to reset r2 (TOC+0x8000). */
+struct ppc64_stub_entry
+{
+	/* 28 byte jump instruction sequence (7 instructions) */
+	unsigned char jump[28];
+	unsigned char unused[4];
+	/* Data for the above code */
+	struct ppc64_opd_entry opd;
+};
+
+/* We use a stub to fix up r2 (TOC ptr) and to jump to the (external)
+   function which may be more than 24-bits away.  We could simply
+   patch the new r2 value and function pointer into the stub, but it's
+   significantly shorter to put these values at the end of the stub
+   code, and patch the stub address (32-bits relative to the TOC ptr,
+   r2) into the stub. */
+static struct ppc64_stub_entry ppc64_stub =
+{ .jump = {
+	0x3d, 0x82, 0x00, 0x00, /* addis   r12,r2, <high> */
+	0x39, 0x8c, 0x00, 0x00, /* addi    r12,r12, <low> */
+	/* Save current r2 value in magic place on the stack. */
+	0xf8, 0x41, 0x00, 0x28, /* std     r2,40(r1) */
+	0xe9, 0x6c, 0x00, 0x20, /* ld      r11,32(r12) */
+	0xe8, 0x4c, 0x00, 0x28, /* ld      r2,40(r12) */
+	0x7d, 0x69, 0x03, 0xa6, /* mtctr   r11 */
+	0x4e, 0x80, 0x04, 0x20  /* bctr */
+} };
+
+/* Count how many different 24-bit relocations (different symbol,
+   different addend) */
+static unsigned int count_relocs(const Elf64_Rela *rela, unsigned int num)
+{
+	unsigned int i, j, ret = 0;
+
+	/* FIXME: Only count external ones --RR */
+	/* Sure, this is order(n^2), but it's usually short, and not
+           time critical */
+	for (i = 0; i < num; i++) {
+		/* Only count 24-bit relocs, others don't need stubs */
+		if (ELF64_R_TYPE(rela[i].r_info) != R_PPC_REL24)
+			continue;
+		for (j = 0; j < i; j++) {
+			/* If this addend appeared before, it's
+                           already been counted */
+			if (rela[i].r_info == rela[j].r_info
+			    && rela[i].r_addend == rela[j].r_addend)
+				break;
+		}
+		if (j == i) ret++;
+	}
+	return ret;
+}
+
+void *module_alloc(unsigned long size)
+{
+	if (size == 0)
+		return NULL;
+	return vmalloc(size);
+}
+
+/* Free memory returned from module_alloc */
+void module_free(struct module *mod, void *module_region)
+{
+	vfree(module_region);
+	/* FIXME: If module_region == mod->init_region, trim exception
+           table entries. */
+}
+
+/* Get size of potential trampolines required. */
+static unsigned long get_stubs_size(const Elf64_Ehdr *hdr,
+				    const Elf64_Shdr *sechdrs)
+{
+	/* One extra reloc so it's always 0-funcaddr terminated */
+	unsigned long relocs = 1;
+	unsigned i;
+
+	/* Every relocated section... */
+	for (i = 1; i < hdr->e_shnum; i++) {
+		if (sechdrs[i].sh_type == SHT_RELA) {
+			DEBUGP("Found relocations in section %u\n", i);
+			DEBUGP("Ptr: %p.  Number: %lu\n",
+			       (void *)sechdrs[i].sh_addr,
+			       sechdrs[i].sh_size / sizeof(Elf64_Rela));
+			relocs += count_relocs((void *)sechdrs[i].sh_addr,
+					       sechdrs[i].sh_size
+					       / sizeof(Elf64_Rela));
+		}
+	}
+
+	DEBUGP("Looks like a total of %lu stubs, max\n", relocs);
+	return relocs * sizeof(struct ppc64_stub_entry);
+}
+
+int module_frob_arch_sections(Elf64_Ehdr *hdr,
+			      Elf64_Shdr *sechdrs,
+			      char *secstrings,
+			      struct module *me)
+{
+	unsigned int i;
+
+	/* Find .toc and .stubs sections */
+	for (i = 1; i < hdr->e_shnum; i++) {
+		char *p;
+		if (strcmp(secstrings + sechdrs[i].sh_name, ".stubs") == 0)
+			me->arch.stubs_section = i;
+		else if (strcmp(secstrings + sechdrs[i].sh_name, ".toc") == 0)
+			me->arch.toc_section = i;
+
+		/* We don't handle .init for the moment: rename to _init */
+		while ((p = strstr(secstrings + sechdrs[i].sh_name, ".init")))
+			p[0] = '_';
+	}
+	if (!me->arch.stubs_section || !me->arch.toc_section) {
+		printk("%s: doesn't contain .toc or .stubs.\n", me->name);
+		return -ENOEXEC;
+	}
+
+	/* Override the stubs size */
+	sechdrs[me->arch.stubs_section].sh_size = get_stubs_size(hdr, sechdrs);
+	return 0;
+}
+
+int apply_relocate(Elf64_Shdr *sechdrs,
+		   const char *strtab,
+		   unsigned int symindex,
+		   unsigned int relsec,
+		   struct module *me)
+{
+	printk(KERN_ERR "%s: Non-ADD RELOCATION unsupported\n", me->name);
+	return -ENOEXEC;
+}
+
+/* Both low and high 16 bits are added as SIGNED additions, so if low
+   16 bits has high bit set, high 16 bits must be adjusted.  These
+   macros do that (stolen from binutils). */
+#define PPC_LO(v) ((v) & 0xffff)
+#define PPC_HI(v) (((v) >> 16) & 0xffff)
+#define PPC_HA(v) PPC_HI ((v) + 0x8000)
+
+/* Patch stub to reference function and correct r2 value. */
+static inline int create_stub(struct ppc64_stub_entry *entry,
+			      unsigned long my_r2,
+			      unsigned long func,
+			      unsigned long r2)
+{
+	Elf64_Half *loc1, *loc2;
+	long reladdr;
+
+	*entry = ppc64_stub;
+
+	loc1 = (Elf64_Half *)&entry->jump[2];
+	loc2 = (Elf64_Half *)&entry->jump[6];
+
+	/* Stub uses address relative to r2, which is set to the TOC +
+           0x8000. */
+	reladdr = (unsigned long)entry - my_r2;
+	if (reladdr > 0x7FFFFFFF || reladdr < -(0x80000000L)) {
+		printk("Address %p of stub out of range of %p.\n",
+		       (void *)reladdr, (void *)my_r2);
+		return 0;
+	}
+	DEBUGP("Stub %p get data from reladdr %li\n", entry, reladdr);
+
+	*loc1 = PPC_HA(reladdr);
+	*loc2 = PPC_LO(reladdr);
+	entry->opd.funcaddr = func;
+	entry->opd.r2 = r2;
+
+	DEBUGP("Stub: %08X %08X %08X %08X %08X %08X %08X: %p %p\n",
+	       ((unsigned int *)entry->jump)[0],
+	       ((unsigned int *)entry->jump)[1],
+	       ((unsigned int *)entry->jump)[2],
+	       ((unsigned int *)entry->jump)[3],
+	       ((unsigned int *)entry->jump)[4],
+	       ((unsigned int *)entry->jump)[5],
+	       ((unsigned int *)entry->jump)[6],
+	       (void *)entry->opd.funcaddr,
+	       (void *)entry->opd.r2);
+	return 1;
+}
+
+/* Given ".function" reference, return address of "function" opd entry */
+static struct ppc64_opd_entry *find_function(const char *name,
+					     Elf64_Shdr *sechdrs,
+					     unsigned int symindex,
+					     const char *strtab,
+					     struct module *me,
+					     struct kernel_symbol_group **ksg)
+{
+	unsigned long val;
+
+	if (name[0] != '.')
+		return 0;
+
+	val = find_symbol_internal(sechdrs, symindex, strtab, name+1, me, ksg);
+
+	DEBUGP("Function %s is at %p\n", name+1, (void *)val);
+	return (void *)val;
+}
+
+/* r2 is the TOC pointer: it actually points 0x8000 into the TOC (this
+   gives the value maximum span in an instruction which uses a signed
+   offset) */
+static inline unsigned long my_r2(Elf64_Shdr *sechdrs, struct module *me)
+{
+	return sechdrs[me->arch.toc_section].sh_addr + 0x8000;
+}
+
+/* Create stub for this OPD address */
+static unsigned long stub_for_addr(Elf64_Shdr *sechdrs,
+				   unsigned long addr,
+				   unsigned long r2,
+				   struct module *me)
+{
+	struct ppc64_stub_entry *stubs;
+	unsigned int i, num_stubs;
+
+	DEBUGP("Looking for stub for %p\n", (void *)addr);
+
+	num_stubs = sechdrs[me->arch.stubs_section].sh_size / sizeof(*stubs);
+
+	/* Find this stub, or if that fails, the next avail. entry */
+	stubs = (void *)sechdrs[me->arch.stubs_section].sh_addr;
+	for (i = 0; stubs[i].opd.funcaddr; i++) {
+		BUG_ON(i >= num_stubs);
+
+		if (stubs[i].opd.funcaddr == addr) {
+			DEBUGP("Reusing stub %u (%p) for %p\n",
+			       i, &stubs[i], (void *)addr);
+			return (unsigned long)&stubs[i];
+		}
+	}
+	DEBUGP("Here for %p\n", (void *)addr);
+
+	if (!create_stub(&stubs[i], my_r2(sechdrs, me), addr, r2))
+		return (unsigned long)-EINVAL;
+
+	DEBUGP("CREATED stub %u for %p\n", i, (void *)addr);
+
+	return (unsigned long)&stubs[i];
+}
+
+/* We need a stub to set the toc ptr when we make external calls. */
+static unsigned long do_stub_call(Elf64_Shdr *sechdrs,
+				  const char *strtab,
+				  unsigned int symindex,
+				  void *location,
+				  const char *funcname,
+				  struct module *me)
+{
+	struct ppc64_opd_entry *opd;
+	struct kernel_symbol_group *ksg;
+
+	DEBUGP("Doing stub for %lu (%s)\n",
+	       (unsigned long)location, funcname);
+	opd = find_function(funcname, sechdrs, symindex, strtab, me, &ksg);
+	if (!opd) {
+		printk("%s: Can't find function `%s'\n", me->name, funcname);
+		return (unsigned long)-ENOENT;
+	}
+
+	return stub_for_addr(sechdrs, opd->funcaddr, opd->r2, me);
+}
+
+/* We expect a noop next: if it is, replace it with instruction to
+   restore r2. */
+static int restore_r2(u32 *instruction)
+{
+	if (*instruction != 0x60000000) {
+		printk("Expect noop after relocate, got %08x\n", *instruction);
+		return 0;
+	}
+	*instruction = 0xe8410028;	/* ld r2,40(r1) */
+	return 1;
+}
+
+int apply_relocate_add(Elf64_Shdr *sechdrs,
+		       const char *strtab,
+		       unsigned int symindex,
+		       unsigned int relsec,
+		       struct module *me)
+{
+	unsigned int i;
+	Elf64_Rela *rela = (void *)sechdrs[relsec].sh_addr;
+	Elf64_Sym *sym;
+	unsigned long *location;
+	unsigned long value;
+
+	DEBUGP("Applying ADD relocate section %u to %u\n", relsec,
+	       sechdrs[relsec].sh_info);
+	for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rela); i++) {
+		/* This is where to make the change */
+		location = (void *)sechdrs[sechdrs[relsec].sh_info].sh_addr
+			+ rela[i].r_offset;
+		/* This is the symbol it is referring to */
+		sym = (Elf64_Sym *)sechdrs[symindex].sh_addr
+			+ ELF64_R_SYM(rela[i].r_info);
+
+		DEBUGP("RELOC at %p: %li-type as %s (%lu) + %li\n",
+		       location, (long)ELF64_R_TYPE(rela[i].r_info),
+		       strtab + sym->st_name, (unsigned long)sym->st_value,
+		       (long)rela[i].r_addend);
+
+		/* REL24 references to (external) .function won't
+                   resolve; deal with that below */
+		if (!sym->st_value
+		    && ELF64_R_TYPE(rela[i].r_info) != R_PPC_REL24) {
+			printk("%s: Unknown symbol %s (index %u)\n",
+			       me->name, strtab + sym->st_name,
+			       sym->st_shndx);
+			return -ENOENT;
+		}
+		/* `Everything is relative'. */
+		value = sym->st_value + rela[i].r_addend;
+
+		switch (ELF64_R_TYPE(rela[i].r_info)) {
+		case R_PPC64_ADDR32:
+			/* Simply set it */
+			DEBUGP("Setting location %p to 32-bit value %u\n",
+			       location, (unsigned int)value);
+			*(u32 *)location = value;
+			break;
+			
+		case R_PPC64_ADDR64:
+			/* Simply set it */
+			*(unsigned long *)location = value;
+			DEBUGP("Setting location %p to 64-bit value %p\n",
+			       location, (void *)value);
+			break;
+
+		case R_PPC64_TOC:
+			*(unsigned long *)location = my_r2(sechdrs, me);
+			break;
+
+		case R_PPC64_TOC16_DS:
+			/* Subtact TOC pointer */
+			value -= my_r2(sechdrs, me);
+			if ((value & 3) != 0 || value + 0x8000 > 0xffff) {
+				DEBUGP("%s: bad TOC16_DS relocation (%lu)\n",
+				       me->name, value);
+				return -ENOEXEC;
+			}
+			*((uint16_t *) location)
+				= (*((uint16_t *) location) & ~0xfffc)
+				| (value & 0xfffc);
+			DEBUGP("Modifying location %p by TOC (%p) => %i\n",
+			       location, 
+			       (void *)my_r2(sechdrs, me),
+			       *(uint16_t *)location);
+			break;
+
+		case R_PPC_REL24:
+			/* FIXME: Handle weak symbols here --RR */
+			if (sym->st_shndx == SHN_UNDEF) {
+				value = do_stub_call(sechdrs, strtab,
+						     symindex, location,
+						     strtab+sym->st_name, me);
+				if (IS_ERR((void *)value))
+					return value;
+				value += rela[i].r_addend;
+				if (!restore_r2((u32 *)location + 1))
+					return -ENOEXEC;
+			}
+
+			/* Convert value to relative */
+			value -= (unsigned long)location;
+			if (value + 0x2000000 > 0x3ffffff || (value & 3) != 0){
+				printk("REL24 relocation %li out of range!\n",
+				       (long int)value);
+				return -ENOEXEC;
+			}
+
+			/* Only replace bits 2 through 26 */
+			*(uint32_t *)location 
+				= (*(uint32_t *)location & ~0x03fffffc)
+				| (value & 0x03fffffc);
+			break;
+
+		default:
+			printk("Unknown ADD relocation: %lu\n",
+			       (unsigned long)ELF64_R_TYPE(rela[i].r_info));
+			return -ENOEXEC;
+		}
+	}
+
+	return 0;
+}
+
+/* In arch/ppc64/mm/extable.c */
+extern void sort_ex_table(struct exception_table_entry *start,
+			  struct exception_table_entry *finish);
+
+int module_finalize(const Elf_Ehdr *hdr,
+		    const Elf_Shdr *sechdrs,
+		    struct module *me)
+{
+	struct ppc64_stub_entry *stubs;
+	unsigned int i;
+
+	/* Here is where we copy the OPD entry into the stub: we don't
+           do it ealier in case it's actually in the same module, and
+           hasn't been relocated yet. */
+	stubs = (void *)sechdrs[me->arch.stubs_section].sh_addr;
+	for (i = 0; stubs[i].opd.funcaddr; i++) {
+		struct ppc64_opd_entry *opd;
+
+		/* We mark opd pointers by setting r2 to 0: otherwise
+                   it's a function pointer already. */
+		if (stubs[i].opd.r2 == 0) {
+			/* We put the opd entry ptr in the funcaddr member. */
+			opd = (void *)stubs[i].opd.funcaddr;
+			stubs[i].opd = *opd;
+		}
+	}
+
+	sort_ex_table(me->extable.entry,
+		      me->extable.entry + me->extable.num_entries);
+	return 0;
+}

arch/ppc64/kernel/ppc_ksyms.c

@@ -47,9 +47,6 @@
 #include <asm/iSeries/HvLpConfig.h>
 #endif
 
-/* Tell string.h we don't want memcpy etc. as cpp defines */
-#define EXPORT_SYMTAB_STROPS
-
 extern int sys_ioctl(unsigned int fd, unsigned int cmd, unsigned long arg);
 extern int sys_sigreturn(struct pt_regs *regs);
 extern int do_signal(sigset_t *, struct pt_regs *);
@@ -81,6 +78,7 @@ EXPORT_SYMBOL(isa_io_base);
 EXPORT_SYMBOL(pci_io_base);
 
 EXPORT_SYMBOL(find_next_zero_bit);
+EXPORT_SYMBOL(find_next_zero_le_bit);
 
 EXPORT_SYMBOL(strcpy);
 EXPORT_SYMBOL(strncpy);
@@ -184,7 +182,6 @@ EXPORT_SYMBOL(giveup_fpu);
 EXPORT_SYMBOL(enable_kernel_fp);
 EXPORT_SYMBOL(flush_icache_range);
 EXPORT_SYMBOL(flush_icache_user_range);
-EXPORT_SYMBOL(flush_icache_page);
 EXPORT_SYMBOL(flush_dcache_page);
 #ifdef CONFIG_SMP
 #ifdef CONFIG_PPC_ISERIES
@@ -207,9 +204,6 @@ EXPORT_SYMBOL(find_all_nodes);
 EXPORT_SYMBOL(get_property);
 
 
-EXPORT_SYMBOL_NOVERS(__ashrdi3);
-EXPORT_SYMBOL_NOVERS(__ashldi3);
-EXPORT_SYMBOL_NOVERS(__lshrdi3);
 EXPORT_SYMBOL_NOVERS(memcpy);
 EXPORT_SYMBOL_NOVERS(memset);
 EXPORT_SYMBOL_NOVERS(memmove);

arch/ppc64/kernel/sys_ppc32.c

@@ -934,431 +934,38 @@ asmlinkage long sys32_adjtimex(struct timex32 *utp)
 	return ret;
 }
 
-
-
 #ifdef CONFIG_MODULES
 
-extern asmlinkage unsigned long sys_create_module(const char *name_user, size_t size);
+extern asmlinkage long sys_init_module(void *, unsigned long, const char *);
 
-asmlinkage unsigned long sys32_create_module(const char *name_user, compat_size_t size)
+asmlinkage int sys32_init_module(void *umod, u32 len, const char *uargs)
 {
-	return sys_create_module(name_user, (size_t)size);
+	return sys_init_module(umod, len, uargs);
 }
 
+extern asmlinkage long sys_delete_module(const char *, unsigned int);
 
-
-extern asmlinkage long sys_init_module(const char *name_user, struct module *mod_user);
-
-asmlinkage long sys32_init_module(const char *name_user, struct module *mod_user)
+asmlinkage int sys32_delete_module(const char *name_user, unsigned int flags)
 {
-	return sys_init_module(name_user, mod_user);
-}
-
-
-
-extern asmlinkage long sys_delete_module(const char *name_user);
-
-asmlinkage long sys32_delete_module(const char *name_user)
-{
-	return sys_delete_module(name_user);
-}
-
-
-
-struct module_info32 {
-	u32 addr;
-	u32 size;
-	u32 flags;
-	s32 usecount;
-};
-
-/* Query various bits about modules.  */
-
-static inline long
-get_mod_name(const char *user_name, char **buf)
-{
-	unsigned long page;
-	long retval;
-
-	if ((unsigned long)user_name >= TASK_SIZE
-	    && !segment_eq(get_fs (), KERNEL_DS))
-		return -EFAULT;
-
-	page = __get_free_page(GFP_KERNEL);
-	if (!page)
-		return -ENOMEM;
-
-	retval = strncpy_from_user((char *)page, user_name, PAGE_SIZE);
-	if (retval > 0) {
-		if (retval < PAGE_SIZE) {
-			*buf = (char *)page;
-			return retval;
-		}
-		retval = -ENAMETOOLONG;
-	} else if (!retval)
-		retval = -EINVAL;
-
-	free_page(page);
-	return retval;
-}
-
-static inline void
-put_mod_name(char *buf)
-{
-	free_page((unsigned long)buf);
-}
-
-static __inline__ struct module *find_module(const char *name)
-{
-	struct module *mod;
-
-	for (mod = module_list; mod ; mod = mod->next) {
-		if (mod->flags & MOD_DELETED)
-			continue;
-		if (!strcmp(mod->name, name))
-			break;
-	}
-
-	return mod;
-}
-
-static int
-qm_modules(char *buf, size_t bufsize, compat_size_t *ret)
-{
-	struct module *mod;
-	size_t nmod, space, len;
-
-	nmod = space = 0;
-
-	for (mod = module_list; mod->next != NULL; mod = mod->next, ++nmod) {
-		len = strlen(mod->name)+1;
-		if (len > bufsize)
-			goto calc_space_needed;
-		if (copy_to_user(buf, mod->name, len))
-			return -EFAULT;
-		buf += len;
-		bufsize -= len;
-		space += len;
-	}
-
-	if (put_user(nmod, ret))
-		return -EFAULT;
-	else
-		return 0;
-
-calc_space_needed:
-	space += len;
-	while ((mod = mod->next)->next != NULL)
-		space += strlen(mod->name)+1;
-
-	if (put_user(space, ret))
-		return -EFAULT;
-	else
-		return -ENOSPC;
-}
-
-static int
-qm_deps(struct module *mod, char *buf, size_t bufsize, compat_size_t *ret)
-{
-	size_t i, space, len;
-
-	if (mod->next == NULL)
-		return -EINVAL;
-	if (!MOD_CAN_QUERY(mod))
-		return put_user(0, ret);
-
-	space = 0;
-	for (i = 0; i < mod->ndeps; ++i) {
-		const char *dep_name = mod->deps[i].dep->name;
-
-		len = strlen(dep_name)+1;
-		if (len > bufsize)
-			goto calc_space_needed;
-		if (copy_to_user(buf, dep_name, len))
-			return -EFAULT;
-		buf += len;
-		bufsize -= len;
-		space += len;
-	}
-
-	return put_user(i, ret);
-
-calc_space_needed:
-	space += len;
-	while (++i < mod->ndeps)
-		space += strlen(mod->deps[i].dep->name)+1;
-
-	if (put_user(space, ret))
-		return -EFAULT;
-	else
-		return -ENOSPC;
-}
-
-static int
-qm_refs(struct module *mod, char *buf, size_t bufsize, compat_size_t *ret)
-{
-	size_t nrefs, space, len;
-	struct module_ref *ref;
-
-	if (mod->next == NULL)
-		return -EINVAL;
-	if (!MOD_CAN_QUERY(mod))
-		if (put_user(0, ret))
-			return -EFAULT;
-		else
-			return 0;
-
-	space = 0;
-	for (nrefs = 0, ref = mod->refs; ref ; ++nrefs, ref = ref->next_ref) {
-		const char *ref_name = ref->ref->name;
-
-		len = strlen(ref_name)+1;
-		if (len > bufsize)
-			goto calc_space_needed;
-		if (copy_to_user(buf, ref_name, len))
-			return -EFAULT;
-		buf += len;
-		bufsize -= len;
-		space += len;
-	}
-
-	if (put_user(nrefs, ret))
-		return -EFAULT;
-	else
-		return 0;
-
-calc_space_needed:
-	space += len;
-	while ((ref = ref->next_ref) != NULL)
-		space += strlen(ref->ref->name)+1;
-
-	if (put_user(space, ret))
-		return -EFAULT;
-	else
-		return -ENOSPC;
-}
-
-static inline int
-qm_symbols(struct module *mod, char *buf, size_t bufsize, compat_size_t *ret)
-{
-	size_t i, space, len;
-	struct module_symbol *s;
-	char *strings;
-	unsigned *vals;
-
-	if (!MOD_CAN_QUERY(mod))
-		if (put_user(0, ret))
-			return -EFAULT;
-		else
-			return 0;
-
-	space = mod->nsyms * 2*sizeof(u32);
-
-	i = len = 0;
-	s = mod->syms;
-
-	if (space > bufsize)
-		goto calc_space_needed;
-
-	if (!access_ok(VERIFY_WRITE, buf, space))
-		return -EFAULT;
-
-	bufsize -= space;
-	vals = (unsigned *)buf;
-	strings = buf+space;
-
-	for (; i < mod->nsyms ; ++i, ++s, vals += 2) {
-		len = strlen(s->name)+1;
-		if (len > bufsize)
-			goto calc_space_needed;
-
-		if (copy_to_user(strings, s->name, len)
-		    || __put_user(s->value, vals+0)
-		    || __put_user(space, vals+1))
-			return -EFAULT;
-
-		strings += len;
-		bufsize -= len;
-		space += len;
-	}
-
-	if (put_user(i, ret))
-		return -EFAULT;
-	else
-		return 0;
-
-calc_space_needed:
-	for (; i < mod->nsyms; ++i, ++s)
-		space += strlen(s->name)+1;
-
-	if (put_user(space, ret))
-		return -EFAULT;
-	else
-		return -ENOSPC;
-}
-
-static inline int
-qm_info(struct module *mod, char *buf, size_t bufsize, compat_size_t *ret)
-{
-	int error = 0;
-
-	if (mod->next == NULL)
-		return -EINVAL;
-
-	if (sizeof(struct module_info32) <= bufsize) {
-		struct module_info32 info;
-		info.addr = (unsigned long)mod;
-		info.size = mod->size;
-		info.flags = mod->flags;
-		info.usecount =
-			((mod_member_present(mod, can_unload)
-			  && mod->can_unload)
-			 ? -1 : atomic_read(&mod->uc.usecount));
-
-		if (copy_to_user(buf, &info, sizeof(struct module_info32)))
-			return -EFAULT;
-	} else
-		error = -ENOSPC;
-
-	if (put_user(sizeof(struct module_info32), ret))
-		return -EFAULT;
-
-	return error;
-}
-
-/* Note: it is necessary to treat which as an unsigned int, 
- * with the corresponding cast to a signed int to insure that the 
- * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
- * and the register representation of a signed int (msr in 64-bit mode) is performed.
- */
-asmlinkage long sys32_query_module(char *name_user, u32 which, char *buf, compat_size_t bufsize, u32 ret)
-{
-	struct module *mod;
-	int err;
-	
-	lock_kernel();
-	if (name_user == 0) {
-		/* This finds "kernel_module" which is not exported. */
-		for(mod = module_list; mod->next != NULL; mod = mod->next)
-			;
-	} else {
-		long namelen;
-		char *name;
-
-		if ((namelen = get_mod_name(name_user, &name)) < 0) {
-			err = namelen;
-			goto out;
-		}
-		err = -ENOENT;
-		if (namelen == 0) {
-			/* This finds "kernel_module" which is not exported. */
-			for(mod = module_list; mod->next != NULL; mod = mod->next)
-				;
-		} else if ((mod = find_module(name)) == NULL) {
-			put_mod_name(name);
-			goto out;
-		}
-		put_mod_name(name);
-	}
-
-	switch ((int)which)
-	{
-	case 0:
-		err = 0;
-		break;
-	case QM_MODULES:
-		err = qm_modules(buf, bufsize, (compat_size_t *)AA(ret));
-		break;
-	case QM_DEPS:
-		err = qm_deps(mod, buf, bufsize, (compat_size_t *)AA(ret));
-		break;
-	case QM_REFS:
-		err = qm_refs(mod, buf, bufsize, (compat_size_t *)AA(ret));
-		break;
-	case QM_SYMBOLS:
-		err = qm_symbols(mod, buf, bufsize, (compat_size_t *)AA(ret));
-		break;
-	case QM_INFO:
-		err = qm_info(mod, buf, bufsize, (compat_size_t *)AA(ret));
-		break;
-	default:
-		err = -EINVAL;
-		break;
-	}
-out:
-	unlock_kernel();
-	
-	return err;
-}
-
-
-
-struct kernel_sym32 {
-	u32 value;
-	char name[60];
-};
-		 
-extern asmlinkage long sys_get_kernel_syms(struct kernel_sym *table);
-
-asmlinkage long sys32_get_kernel_syms(struct kernel_sym32 *table)
-{
-	int len, i;
-	struct kernel_sym *tbl;
-	mm_segment_t old_fs;
-	
-	len = sys_get_kernel_syms(NULL);
-	if (!table) return len;
-	tbl = kmalloc (len * sizeof (struct kernel_sym), GFP_KERNEL);
-	if (!tbl) return -ENOMEM;
-	old_fs = get_fs();
-	set_fs (KERNEL_DS);
-	sys_get_kernel_syms(tbl);
-	set_fs (old_fs);
-	for (i = 0; i < len; i++, table += sizeof (struct kernel_sym32)) {
-		if (put_user (tbl[i].value, &table->value) ||
-		    copy_to_user (table->name, tbl[i].name, 60))
-			break;
-	}
-	kfree (tbl);
-	
-	return i;
+	return sys_delete_module(name_user, flags);
 }
 
 #else /* CONFIG_MODULES */
 
-asmlinkage unsigned long sys32_create_module(const char *name_user, size_t size)
-{
-	return -ENOSYS;
-}
-
-asmlinkage long sys32_init_module(const char *name_user, struct module *mod_user)
+asmlinkage int
+sys32_init_module(const char *name_user, struct module *mod_user)
 {
 	return -ENOSYS;
 }
 
-asmlinkage long sys32_delete_module(const char *name_user)
-{
-	return -ENOSYS;
-}
-
-asmlinkage long sys32_query_module(const char *name_user, int which, char *buf, size_t bufsize, size_t *ret)
-{
-	/* Let the program know about the new interface.  Not that it'll do them much good. */
-	if (which == 0)
-		return 0;
-
-	return -ENOSYS;
-}
-
-asmlinkage long sys32_get_kernel_syms(struct kernel_sym *table)
+asmlinkage int
+sys32_delete_module(const char *name_user)
 {
 	return -ENOSYS;
 }
 
 #endif  /* CONFIG_MODULES */
 
-
-
 /* Stuff for NFS server syscalls... */
 struct nfsctl_svc32 {
 	u16			svc32_port;

arch/ppc64/mm/extable.c

@@ -21,10 +21,11 @@ extern struct exception_table_entry __stop___ex_table[];
  * The exception table needs to be sorted because we use the macros
  * which put things into the exception table in a variety of segments
  * as well as the init segment and the main kernel text segment.
+ *
+ * Also used for modules.
  */
-static inline void
-sort_ex_table(struct exception_table_entry *start,
-	      struct exception_table_entry *finish)
+void sort_ex_table(struct exception_table_entry *start,
+		   struct exception_table_entry *finish) __init_or_module
 {
 	struct exception_table_entry el, *p, *q;
 

include/asm-ppc64/module.h

 #ifndef _ASM_PPC64_MODULE_H
 #define _ASM_PPC64_MODULE_H
-/*
- * This file contains the PPC architecture specific module code.
- *
- * Copyright (C) 2001 PPC 64 Team, IBM Corp
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- */
 
-#define module_map(x)		vmalloc(x)
-#define module_unmap(x)		vfree(x)
-#define arch_init_modules(x)	do { } while (0)
-#define module_arch_init(x)  (0)
+struct mod_arch_specific
+{
+	/* Index of stubs section within module. */
+	unsigned int stubs_section;
+
+	/* What section is the TOC? */
+	unsigned int toc_section;
+};
+
+#define Elf_Shdr Elf64_Shdr
+#define Elf_Sym Elf64_Sym
+#define Elf_Ehdr Elf64_Ehdr
+
+/* Make empty section for module_frob_arch_sections to expand. */
+#ifdef MODULE
+asm(".section .stubs,\"ax\",@nobits; .align 3; .previous");
+#endif
+
 #endif /* _ASM_PPC64_MODULE_H */