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/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 */