[net-next-2.6.git] / arch / powerpc / kernel / module.c

/*  Kernel module help for powerpc.
    Copyright (C) 2001, 2003 Rusty Russell IBM Corporation.
    Copyright (C) 2008 Freescale Semiconductor, Inc.

    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>
#include <linux/bug.h>
#include <asm/module.h>
#include <asm/uaccess.h>
#include <asm/firmware.h>
#include <linux/sort.h>

#include "setup.h"

LIST_HEAD(module_bug_list);

void *module_alloc(unsigned long size)
{
	if (size == 0)
		return NULL;

	return vmalloc_exec(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. */
}

static const Elf_Shdr *find_section(const Elf_Ehdr *hdr,
				    const Elf_Shdr *sechdrs,
				    const char *name)
{
	char *secstrings;
	unsigned int i;

	secstrings = (char *)hdr + sechdrs[hdr->e_shstrndx].sh_offset;
	for (i = 1; i < hdr->e_shnum; i++)
		if (strcmp(secstrings+sechdrs[i].sh_name, name) == 0)
			return &sechdrs[i];
	return NULL;
}

int module_finalize(const Elf_Ehdr *hdr,
		const Elf_Shdr *sechdrs, struct module *me)
{
	const Elf_Shdr *sect;
	int err;

	err = module_bug_finalize(hdr, sechdrs, me);
	if (err)
		return err;

	/* Apply feature fixups */
	sect = find_section(hdr, sechdrs, "__ftr_fixup");
	if (sect != NULL)
		do_feature_fixups(cur_cpu_spec->cpu_features,
				  (void *)sect->sh_addr,
				  (void *)sect->sh_addr + sect->sh_size);

#ifdef CONFIG_PPC64
	sect = find_section(hdr, sechdrs, "__fw_ftr_fixup");
	if (sect != NULL)
		do_feature_fixups(powerpc_firmware_features,
				  (void *)sect->sh_addr,
				  (void *)sect->sh_addr + sect->sh_size);
#endif

	sect = find_section(hdr, sechdrs, "__lwsync_fixup");
	if (sect != NULL)
		do_lwsync_fixups(cur_cpu_spec->cpu_features,
				 (void *)sect->sh_addr,
				 (void *)sect->sh_addr + sect->sh_size);

	return 0;
}

void module_arch_cleanup(struct module *mod)
{
	module_bug_cleanup(mod);
}
Commit	Line	Data
f0c426bc KG	1	/* Kernel module help for powerpc.
	2	Copyright (C) 2001, 2003 Rusty Russell IBM Corporation.
	3	Copyright (C) 2008 Freescale Semiconductor, Inc.
	4
	5	This program is free software; you can redistribute it and/or modify
	6	it under the terms of the GNU General Public License as published by
	7	the Free Software Foundation; either version 2 of the License, or
	8	(at your option) any later version.
	9
	10	This program is distributed in the hope that it will be useful,
	11	but WITHOUT ANY WARRANTY; without even the implied warranty of
	12	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	13	GNU General Public License for more details.
	14
	15	You should have received a copy of the GNU General Public License
	16	along with this program; if not, write to the Free Software
	17	Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	18	*/
	19	#include <linux/module.h>
	20	#include <linux/elf.h>
	21	#include <linux/moduleloader.h>
	22	#include <linux/err.h>
	23	#include <linux/vmalloc.h>
	24	#include <linux/bug.h>
	25	#include <asm/module.h>
	26	#include <asm/uaccess.h>
	27	#include <asm/firmware.h>
	28	#include <linux/sort.h>
	29
	30	#include "setup.h"
	31
	32	LIST_HEAD(module_bug_list);
	33
	34	void *module_alloc(unsigned long size)
	35	{
	36	if (size == 0)
	37	return NULL;
	38
	39	return vmalloc_exec(size);
	40	}
	41
	42	/* Free memory returned from module_alloc */
	43	void module_free(struct module mod, void module_region)
	44	{
	45	vfree(module_region);
	46	/* FIXME: If module_region == mod->init_region, trim exception
	47	table entries. */
	48	}
	49
	50	static const Elf_Shdr find_section(const Elf_Ehdr hdr,
	51	const Elf_Shdr *sechdrs,
	52	const char *name)
	53	{
	54	char *secstrings;
	55	unsigned int i;
	56
	57	secstrings = (char *)hdr + sechdrs[hdr->e_shstrndx].sh_offset;
	58	for (i = 1; i < hdr->e_shnum; i++)
	59	if (strcmp(secstrings+sechdrs[i].sh_name, name) == 0)
	60	return &sechdrs[i];
	61	return NULL;
	62	}
	63
	64	int module_finalize(const Elf_Ehdr *hdr,
65	const Elf_Shdr sechdrs, struct module me)
66	{
67	const Elf_Shdr *sect;
68	int err;
69
70	err = module_bug_finalize(hdr, sechdrs, me);
71	if (err)
72	return err;
73
74	/* Apply feature fixups */
75	sect = find_section(hdr, sechdrs, "__ftr_fixup");
76	if (sect != NULL)
77	do_feature_fixups(cur_cpu_spec->cpu_features,
78	(void *)sect->sh_addr,
79	(void *)sect->sh_addr + sect->sh_size);
80
81	#ifdef CONFIG_PPC64
82	sect = find_section(hdr, sechdrs, "__fw_ftr_fixup");
83	if (sect != NULL)
84	do_feature_fixups(powerpc_firmware_features,
85	(void *)sect->sh_addr,
86	(void *)sect->sh_addr + sect->sh_size);
87	#endif
88
2d1b2027 KG	89	sect = find_section(hdr, sechdrs, "__lwsync_fixup");
	90	if (sect != NULL)
	91	do_lwsync_fixups(cur_cpu_spec->cpu_features,
	92	(void *)sect->sh_addr,
	93	(void *)sect->sh_addr + sect->sh_size);
	94
f0c426bc KG	95	return 0;
	96	}
	97
	98	void module_arch_cleanup(struct module *mod)
	99	{
	100	module_bug_cleanup(mod);
	101	}