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

/*
 * arch/score/kernel/module.c
 *
 * Score Processor version.
 *
 * Copyright (C) 2009 Sunplus Core Technology Co., Ltd.
 *  Chen Liqin <liqin.chen@sunplusct.com>
 *  Lennox Wu <lennox.wu@sunplusct.com>
 *
 * 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, see the file COPYING, or write
 * to the Free Software Foundation, Inc.,
 * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */

#include <linux/moduleloader.h>
#include <linux/module.h>
#include <linux/vmalloc.h>

void *module_alloc(unsigned long size)
{
	return size ? vmalloc(size) : NULL;
}

/* Free memory returned from module_alloc */
void module_free(struct module *mod, void *module_region)
{
	vfree(module_region);
}

int module_frob_arch_sections(Elf_Ehdr *hdr, Elf_Shdr *sechdrs,
			char *secstrings, struct module *mod)
{
	return 0;
}

int apply_relocate(Elf_Shdr *sechdrs, const char *strtab,
		unsigned int symindex, unsigned int relindex,
		struct module *me)
{
	Elf32_Shdr *symsec = sechdrs + symindex;
	Elf32_Shdr *relsec = sechdrs + relindex;
	Elf32_Shdr *dstsec = sechdrs + relsec->sh_info;
	Elf32_Rel *rel = (void *)relsec->sh_addr;
	unsigned int i;

	for (i = 0; i < relsec->sh_size / sizeof(Elf32_Rel); i++, rel++) {
		unsigned long loc;
		Elf32_Sym *sym;
		s32 r_offset;

		r_offset = ELF32_R_SYM(rel->r_info);
		if ((r_offset < 0) ||
		    (r_offset > (symsec->sh_size / sizeof(Elf32_Sym)))) {
			printk(KERN_ERR "%s: bad relocation, section %d reloc %d\n",
				me->name, relindex, i);
				return -ENOEXEC;
		}

		sym = ((Elf32_Sym *)symsec->sh_addr) + r_offset;

		if ((rel->r_offset < 0) ||
		    (rel->r_offset > dstsec->sh_size - sizeof(u32))) {
			printk(KERN_ERR "%s: out of bounds relocation, "
				"section %d reloc %d offset %d size %d\n",
				me->name, relindex, i, rel->r_offset,
				dstsec->sh_size);
			return -ENOEXEC;
		}

		loc = dstsec->sh_addr + rel->r_offset;
		switch (ELF32_R_TYPE(rel->r_info)) {
		case R_SCORE_NONE:
			break;
		case R_SCORE_ABS32:
			*(unsigned long *)loc += sym->st_value;
			break;
		case R_SCORE_HI16:
			break;
		case R_SCORE_LO16: {
			unsigned long hi16_offset, offset;
			unsigned long uvalue;
			unsigned long temp, temp_hi;
			temp_hi = *((unsigned long *)loc - 1);
			temp = *(unsigned long *)loc;

			hi16_offset = (((((temp_hi) >> 16) & 0x3) << 15) |
					((temp_hi) & 0x7fff)) >> 1;
			offset = ((temp >> 16 & 0x03) << 15) |
					((temp & 0x7fff) >> 1);
			offset = (hi16_offset << 16) | (offset & 0xffff);
			uvalue = sym->st_value + offset;
			hi16_offset = (uvalue >> 16) << 1;

			temp_hi = ((temp_hi) & (~(0x37fff))) |
					(hi16_offset & 0x7fff) |
					((hi16_offset << 1) & 0x30000);
			*((unsigned long *)loc - 1) = temp_hi;

			offset = (uvalue & 0xffff) << 1;
			temp = (temp & (~(0x37fff))) | (offset & 0x7fff) |
				((offset << 1) & 0x30000);
			*(unsigned long *)loc = temp;
			break;
		}
		case R_SCORE_24: {
			unsigned long hi16_offset, offset;
			unsigned long uvalue;
			unsigned long temp;

			temp = *(unsigned long *)loc;
			offset = (temp & 0x03FF7FFE);
			hi16_offset = (offset & 0xFFFF0000);
			offset = (hi16_offset | ((offset & 0xFFFF) << 1)) >> 2;

			uvalue = (sym->st_value + offset) >> 1;
			uvalue = uvalue & 0x00ffffff;

			temp = (temp & 0xfc008001) |
				((uvalue << 2) & 0x3ff0000) |
				((uvalue & 0x3fff) << 1);
			*(unsigned long *)loc = temp;
			break;
		}
		default:
			printk(KERN_ERR "%s: unknown relocation: %u\n",
				me->name, ELF32_R_TYPE(rel->r_info));
			return -ENOEXEC;
		}
	}

	return 0;
}

int apply_relocate_add(Elf_Shdr *sechdrs, const char *strtab,
		unsigned int symindex, unsigned int relsec,
		struct module *me)
{
	return 0;
}

/* Given an address, look for it in the module exception tables. */
const struct exception_table_entry *search_module_dbetables(unsigned long addr)
{
	return NULL;
}

/* Put in dbe list if necessary. */
int module_finalize(const Elf_Ehdr *hdr, const Elf_Shdr *sechdrs,
		struct module *me)
{
	return 0;
}

void module_arch_cleanup(struct module *mod) {}
Commit	Line	Data
6bc9a396 CL	1	/*
	2	* arch/score/kernel/module.c
	3	*
	4	* Score Processor version.
	5	*
	6	* Copyright (C) 2009 Sunplus Core Technology Co., Ltd.
	7	* Chen Liqin <liqin.chen@sunplusct.com>
	8	* Lennox Wu <lennox.wu@sunplusct.com>
	9	*
	10	* This program is free software; you can redistribute it and/or modify
	11	* it under the terms of the GNU General Public License as published by
	12	* the Free Software Foundation; either version 2 of the License, or
	13	* (at your option) any later version.
	14	*
	15	* This program is distributed in the hope that it will be useful,
	16	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	17	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	18	* GNU General Public License for more details.
	19	*
	20	* You should have received a copy of the GNU General Public License
	21	* along with this program; if not, see the file COPYING, or write
	22	* to the Free Software Foundation, Inc.,
	23	* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
	24	*/
	25
9fb24cc5	26	#include <linux/moduleloader.h>
6bc9a396 CL	27	#include <linux/module.h>
	28	#include <linux/vmalloc.h>
	29
	30	void *module_alloc(unsigned long size)
	31	{
	32	return size ? vmalloc(size) : NULL;
	33	}
	34
	35	/* Free memory returned from module_alloc */
	36	void module_free(struct module mod, void module_region)
	37	{
	38	vfree(module_region);
	39	}
	40
	41	int module_frob_arch_sections(Elf_Ehdr hdr, Elf_Shdr sechdrs,
	42	char secstrings, struct module mod)
	43	{
	44	return 0;
	45	}
	46
	47	int apply_relocate(Elf_Shdr sechdrs, const char strtab,
	48	unsigned int symindex, unsigned int relindex,
	49	struct module *me)
	50	{
	51	Elf32_Shdr *symsec = sechdrs + symindex;
	52	Elf32_Shdr *relsec = sechdrs + relindex;
	53	Elf32_Shdr *dstsec = sechdrs + relsec->sh_info;
	54	Elf32_Rel rel = (void )relsec->sh_addr;
	55	unsigned int i;
	56
	57	for (i = 0; i < relsec->sh_size / sizeof(Elf32_Rel); i++, rel++) {
	58	unsigned long loc;
	59	Elf32_Sym *sym;
c6067472	60	s32 r_offset;
6bc9a396	61
c6067472 AB	62	r_offset = ELF32_R_SYM(rel->r_info);
	63	if ((r_offset < 0) \|\|
	64	(r_offset > (symsec->sh_size / sizeof(Elf32_Sym)))) {
6bc9a396 CL	65	printk(KERN_ERR "%s: bad relocation, section %d reloc %d\n",
	66	me->name, relindex, i);
	67	return -ENOEXEC;
	68	}
	69
c6067472	70	sym = ((Elf32_Sym *)symsec->sh_addr) + r_offset;
6bc9a396 CL	71
	72	if ((rel->r_offset < 0) \|\|
	73	(rel->r_offset > dstsec->sh_size - sizeof(u32))) {
	74	printk(KERN_ERR "%s: out of bounds relocation, "
	75	"section %d reloc %d offset %d size %d\n",
	76	me->name, relindex, i, rel->r_offset,
	77	dstsec->sh_size);
	78	return -ENOEXEC;
	79	}
	80
	81	loc = dstsec->sh_addr + rel->r_offset;
	82	switch (ELF32_R_TYPE(rel->r_info)) {
	83	case R_SCORE_NONE:
	84	break;
	85	case R_SCORE_ABS32:
	86	(unsigned long )loc += sym->st_value;
	87	break;
	88	case R_SCORE_HI16:
	89	break;
	90	case R_SCORE_LO16: {
	91	unsigned long hi16_offset, offset;
	92	unsigned long uvalue;
	93	unsigned long temp, temp_hi;
	94	temp_hi = ((unsigned long )loc - 1);
	95	temp = (unsigned long )loc;
	96
	97	hi16_offset = (((((temp_hi) >> 16) & 0x3) << 15) \|
	98	((temp_hi) & 0x7fff)) >> 1;
	99	offset = ((temp >> 16 & 0x03) << 15) \|
	100	((temp & 0x7fff) >> 1);
	101	offset = (hi16_offset << 16) \| (offset & 0xffff);
	102	uvalue = sym->st_value + offset;
	103	hi16_offset = (uvalue >> 16) << 1;
	104
	105	temp_hi = ((temp_hi) & (~(0x37fff))) \|
	106	(hi16_offset & 0x7fff) \|
	107	((hi16_offset << 1) & 0x30000);
	108	((unsigned long )loc - 1) = temp_hi;
	109
	110	offset = (uvalue & 0xffff) << 1;
	111	temp = (temp & (~(0x37fff))) \| (offset & 0x7fff) \|
	112	((offset << 1) & 0x30000);
	113	(unsigned long )loc = temp;
	114	break;
	115	}
	116	case R_SCORE_24: {
	117	unsigned long hi16_offset, offset;
	118	unsigned long uvalue;
	119	unsigned long temp;
	120
	121	temp = (unsigned long )loc;
	122	offset = (temp & 0x03FF7FFE);
	123	hi16_offset = (offset & 0xFFFF0000);
	124	offset = (hi16_offset \| ((offset & 0xFFFF) << 1)) >> 2;
	125
	126	uvalue = (sym->st_value + offset) >> 1;
	127	uvalue = uvalue & 0x00ffffff;
	128
	129	temp = (temp & 0xfc008001) \|
	130	((uvalue << 2) & 0x3ff0000) \|
	131	((uvalue & 0x3fff) << 1);
	132	(unsigned long )loc = temp;
	133	break;
	134	}
135	default:
136	printk(KERN_ERR "%s: unknown relocation: %u\n",
137	me->name, ELF32_R_TYPE(rel->r_info));
138	return -ENOEXEC;
139	}
140	}
141
142	return 0;
143	}
144
145	int apply_relocate_add(Elf_Shdr sechdrs, const char strtab,
146	unsigned int symindex, unsigned int relsec,
147	struct module *me)
148	{
149	return 0;
150	}
151
152	/* Given an address, look for it in the module exception tables. */
153	const struct exception_table_entry *search_module_dbetables(unsigned long addr)
154	{
c6067472	155	return NULL;
6bc9a396 CL	156	}
	157
	158	/* Put in dbe list if necessary. */
	159	int module_finalize(const Elf_Ehdr hdr, const Elf_Shdr sechdrs,
	160	struct module *me)
	161	{
	162	return 0;
	163	}
	164
	165	void module_arch_cleanup(struct module *mod) {}