[GitHub/mt8127/android_kernel_alcatel_ttab.git] / arch / arm / kernel / module.c

/*
 *  linux/arch/arm/kernel/module.c
 *
 *  Copyright (C) 2002 Russell King.
 *  Modified for nommu by Hyok S. Choi
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * Module allocation method suggested by Andi Kleen.
 */
#include <linux/module.h>
#include <linux/moduleloader.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/elf.h>
#include <linux/vmalloc.h>
#include <linux/fs.h>
#include <linux/string.h>
#include <linux/gfp.h>

#include <asm/pgtable.h>
#include <asm/sections.h>
#include <asm/unwind.h>

#ifdef CONFIG_XIP_KERNEL
/*
 * The XIP kernel text is mapped in the module area for modules and
 * some other stuff to work without any indirect relocations.
 * MODULES_VADDR is redefined here and not in asm/memory.h to avoid
 * recompiling the whole kernel when CONFIG_XIP_KERNEL is turned on/off.
 */
#undef MODULES_VADDR
#define MODULES_VADDR	(((unsigned long)_etext + ~PGDIR_MASK) & PGDIR_MASK)
#endif

#ifdef CONFIG_MMU
void *module_alloc(unsigned long size)
{
	struct vm_struct *area;

	size = PAGE_ALIGN(size);
	if (!size)
		return NULL;

	area = __get_vm_area(size, VM_ALLOC, MODULES_VADDR, MODULES_END);
	if (!area)
		return NULL;

	return __vmalloc_area(area, GFP_KERNEL, PAGE_KERNEL_EXEC);
}
#else /* CONFIG_MMU */
void *module_alloc(unsigned long size)
{
	return size == 0 ? NULL : vmalloc(size);
}
#endif /* !CONFIG_MMU */

void module_free(struct module *module, void *region)
{
	vfree(region);
}

int module_frob_arch_sections(Elf_Ehdr *hdr,
			      Elf_Shdr *sechdrs,
			      char *secstrings,
			      struct module *mod)
{
#ifdef CONFIG_ARM_UNWIND
	Elf_Shdr *s, *sechdrs_end = sechdrs + hdr->e_shnum;

	for (s = sechdrs; s < sechdrs_end; s++) {
		if (strcmp(".ARM.exidx.init.text", secstrings + s->sh_name) == 0)
			mod->arch.unw_sec_init = s;
		else if (strcmp(".ARM.exidx.devinit.text", secstrings + s->sh_name) == 0)
			mod->arch.unw_sec_devinit = s;
		else if (strcmp(".ARM.exidx", secstrings + s->sh_name) == 0)
			mod->arch.unw_sec_core = s;
		else if (strcmp(".init.text", secstrings + s->sh_name) == 0)
			mod->arch.sec_init_text = s;
		else if (strcmp(".devinit.text", secstrings + s->sh_name) == 0)
			mod->arch.sec_devinit_text = s;
		else if (strcmp(".text", secstrings + s->sh_name) == 0)
			mod->arch.sec_core_text = s;
	}
#endif
	return 0;
}

int
apply_relocate(Elf32_Shdr *sechdrs, const char *strtab, unsigned int symindex,
	       unsigned int relindex, struct module *module)
{
	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 offset;
		u32 upper, lower, sign, j1, j2;

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

		sym = ((Elf32_Sym *)symsec->sh_addr) + 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",
				module->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_ARM_NONE:
			/* ignore */
			break;

		case R_ARM_ABS32:
			*(u32 *)loc += sym->st_value;
			break;

		case R_ARM_PC24:
		case R_ARM_CALL:
		case R_ARM_JUMP24:
			offset = (*(u32 *)loc & 0x00ffffff) << 2;
			if (offset & 0x02000000)
				offset -= 0x04000000;

			offset += sym->st_value - loc;
			if (offset & 3 ||
			    offset <= (s32)0xfe000000 ||
			    offset >= (s32)0x02000000) {
				printk(KERN_ERR
				       "%s: relocation out of range, section "
				       "%d reloc %d sym '%s'\n", module->name,
				       relindex, i, strtab + sym->st_name);
				return -ENOEXEC;
			}

			offset >>= 2;

			*(u32 *)loc &= 0xff000000;
			*(u32 *)loc |= offset & 0x00ffffff;
			break;

	       case R_ARM_V4BX:
		       /* Preserve Rm and the condition code. Alter
			* other bits to re-code instruction as
			* MOV PC,Rm.
			*/
		       *(u32 *)loc &= 0xf000000f;
		       *(u32 *)loc |= 0x01a0f000;
		       break;

		case R_ARM_PREL31:
			offset = *(u32 *)loc + sym->st_value - loc;
			*(u32 *)loc = offset & 0x7fffffff;
			break;

		case R_ARM_MOVW_ABS_NC:
		case R_ARM_MOVT_ABS:
			offset = *(u32 *)loc;
			offset = ((offset & 0xf0000) >> 4) | (offset & 0xfff);
			offset = (offset ^ 0x8000) - 0x8000;

			offset += sym->st_value;
			if (ELF32_R_TYPE(rel->r_info) == R_ARM_MOVT_ABS)
				offset >>= 16;

			*(u32 *)loc &= 0xfff0f000;
			*(u32 *)loc |= ((offset & 0xf000) << 4) |
					(offset & 0x0fff);
			break;

		case R_ARM_THM_CALL:
		case R_ARM_THM_JUMP24:
			upper = *(u16 *)loc;
			lower = *(u16 *)(loc + 2);

			/*
			 * 25 bit signed address range (Thumb-2 BL and B.W
			 * instructions):
			 *   S:I1:I2:imm10:imm11:0
			 * where:
			 *   S     = upper[10]   = offset[24]
			 *   I1    = ~(J1 ^ S)   = offset[23]
			 *   I2    = ~(J2 ^ S)   = offset[22]
			 *   imm10 = upper[9:0]  = offset[21:12]
			 *   imm11 = lower[10:0] = offset[11:1]
			 *   J1    = lower[13]
			 *   J2    = lower[11]
			 */
			sign = (upper >> 10) & 1;
			j1 = (lower >> 13) & 1;
			j2 = (lower >> 11) & 1;
			offset = (sign << 24) | ((~(j1 ^ sign) & 1) << 23) |
				((~(j2 ^ sign) & 1) << 22) |
				((upper & 0x03ff) << 12) |
				((lower & 0x07ff) << 1);
			if (offset & 0x01000000)
				offset -= 0x02000000;
			offset += sym->st_value - loc;

			/* only Thumb addresses allowed (no interworking) */
			if (!(offset & 1) ||
			    offset <= (s32)0xff000000 ||
			    offset >= (s32)0x01000000) {
				printk(KERN_ERR
				       "%s: relocation out of range, section "
				       "%d reloc %d sym '%s'\n", module->name,
				       relindex, i, strtab + sym->st_name);
				return -ENOEXEC;
			}

			sign = (offset >> 24) & 1;
			j1 = sign ^ (~(offset >> 23) & 1);
			j2 = sign ^ (~(offset >> 22) & 1);
			*(u16 *)loc = (u16)((upper & 0xf800) | (sign << 10) |
					    ((offset >> 12) & 0x03ff));
			*(u16 *)(loc + 2) = (u16)((lower & 0xd000) |
						  (j1 << 13) | (j2 << 11) |
						  ((offset >> 1) & 0x07ff));
			break;

		case R_ARM_THM_MOVW_ABS_NC:
		case R_ARM_THM_MOVT_ABS:
			upper = *(u16 *)loc;
			lower = *(u16 *)(loc + 2);

			/*
			 * MOVT/MOVW instructions encoding in Thumb-2:
			 *
			 * i	= upper[10]
			 * imm4	= upper[3:0]
			 * imm3	= lower[14:12]
			 * imm8	= lower[7:0]
			 *
			 * imm16 = imm4:i:imm3:imm8
			 */
			offset = ((upper & 0x000f) << 12) |
				((upper & 0x0400) << 1) |
				((lower & 0x7000) >> 4) | (lower & 0x00ff);
			offset = (offset ^ 0x8000) - 0x8000;
			offset += sym->st_value;

			if (ELF32_R_TYPE(rel->r_info) == R_ARM_THM_MOVT_ABS)
				offset >>= 16;

			*(u16 *)loc = (u16)((upper & 0xfbf0) |
					    ((offset & 0xf000) >> 12) |
					    ((offset & 0x0800) >> 1));
			*(u16 *)(loc + 2) = (u16)((lower & 0x8f00) |
						  ((offset & 0x0700) << 4) |
						  (offset & 0x00ff));
			break;

		default:
			printk(KERN_ERR "%s: unknown relocation: %u\n",
			       module->name, ELF32_R_TYPE(rel->r_info));
			return -ENOEXEC;
		}
	}
	return 0;
}

int
apply_relocate_add(Elf32_Shdr *sechdrs, const char *strtab,
		   unsigned int symindex, unsigned int relsec, struct module *module)
{
	printk(KERN_ERR "module %s: ADD RELOCATION unsupported\n",
	       module->name);
	return -ENOEXEC;
}

#ifdef CONFIG_ARM_UNWIND
static void register_unwind_tables(struct module *mod)
{
	if (mod->arch.unw_sec_init && mod->arch.sec_init_text)
		mod->arch.unwind_init =
			unwind_table_add(mod->arch.unw_sec_init->sh_addr,
					 mod->arch.unw_sec_init->sh_size,
					 mod->arch.sec_init_text->sh_addr,
					 mod->arch.sec_init_text->sh_size);
	if (mod->arch.unw_sec_devinit && mod->arch.sec_devinit_text)
		mod->arch.unwind_devinit =
			unwind_table_add(mod->arch.unw_sec_devinit->sh_addr,
					 mod->arch.unw_sec_devinit->sh_size,
					 mod->arch.sec_devinit_text->sh_addr,
					 mod->arch.sec_devinit_text->sh_size);
	if (mod->arch.unw_sec_core && mod->arch.sec_core_text)
		mod->arch.unwind_core =
			unwind_table_add(mod->arch.unw_sec_core->sh_addr,
					 mod->arch.unw_sec_core->sh_size,
					 mod->arch.sec_core_text->sh_addr,
					 mod->arch.sec_core_text->sh_size);
}

static void unregister_unwind_tables(struct module *mod)
{
	unwind_table_del(mod->arch.unwind_init);
	unwind_table_del(mod->arch.unwind_devinit);
	unwind_table_del(mod->arch.unwind_core);
}
#else
static inline void register_unwind_tables(struct module *mod) { }
static inline void unregister_unwind_tables(struct module *mod) { }
#endif

int
module_finalize(const Elf32_Ehdr *hdr, const Elf_Shdr *sechdrs,
		struct module *module)
{
	register_unwind_tables(module);
	return 0;
}

void
module_arch_cleanup(struct module *mod)
{
	unregister_unwind_tables(mod);
}
Commit	Line	Data
1da177e4 LT	1	/*
	2	* linux/arch/arm/kernel/module.c
	3	*
	4	* Copyright (C) 2002 Russell King.
6a570b28	5	* Modified for nommu by Hyok S. Choi
1da177e4 LT	6	*
	7	* This program is free software; you can redistribute it and/or modify
	8	* it under the terms of the GNU General Public License version 2 as
	9	* published by the Free Software Foundation.
	10	*
	11	* Module allocation method suggested by Andi Kleen.
	12	*/
1da177e4	13	#include <linux/module.h>
f339ab3d	14	#include <linux/moduleloader.h>
1da177e4	15	#include <linux/kernel.h>
27ac792c	16	#include <linux/mm.h>
1da177e4 LT	17	#include <linux/elf.h>
1da177e4 LT	18	#include <linux/vmalloc.h>
1da177e4 LT	19	#include <linux/fs.h>
1da177e4 LT	20	#include <linux/string.h>
5a0e3ad6	21	#include <linux/gfp.h>
1da177e4 LT	22
1da177e4 LT	23	#include <asm/pgtable.h>
37efe642	24	#include <asm/sections.h>
2e1926e7	25	#include <asm/unwind.h>
1da177e4 LT	26
	27	#ifdef CONFIG_XIP_KERNEL
	28	/*
	29	* The XIP kernel text is mapped in the module area for modules and
	30	* some other stuff to work without any indirect relocations.
ab4f2ee1	31	* MODULES_VADDR is redefined here and not in asm/memory.h to avoid
1da177e4 LT	32	* recompiling the whole kernel when CONFIG_XIP_KERNEL is turned on/off.
1da177e4 LT	33	*/
ab4f2ee1	34	#undef MODULES_VADDR
37efe642	35	#define MODULES_VADDR (((unsigned long)_etext + ~PGDIR_MASK) & PGDIR_MASK)
1da177e4 LT	36	#endif
1da177e4 LT	37
6a570b28	38	#ifdef CONFIG_MMU
1da177e4 LT	39	void *module_alloc(unsigned long size)
	40	{
	41	struct vm_struct *area;
	42
	43	size = PAGE_ALIGN(size);
	44	if (!size)
	45	return NULL;
	46
ab4f2ee1	47	area = __get_vm_area(size, VM_ALLOC, MODULES_VADDR, MODULES_END);
1da177e4 LT	48	if (!area)
	49	return NULL;
	50
8ec53663	51	return __vmalloc_area(area, GFP_KERNEL, PAGE_KERNEL_EXEC);
1da177e4	52	}
6a570b28 HC	53	#else /* CONFIG_MMU */
	54	void *module_alloc(unsigned long size)
	55	{
	56	return size == 0 ? NULL : vmalloc(size);
	57	}
	58	#endif /* !CONFIG_MMU */
1da177e4 LT	59
	60	void module_free(struct module module, void region)
	61	{
	62	vfree(region);
	63	}
	64
	65	int module_frob_arch_sections(Elf_Ehdr *hdr,
	66	Elf_Shdr *sechdrs,
	67	char *secstrings,
	68	struct module *mod)
	69	{
2e1926e7 CM	70	#ifdef CONFIG_ARM_UNWIND
	71	Elf_Shdr s, sechdrs_end = sechdrs + hdr->e_shnum;
	72
	73	for (s = sechdrs; s < sechdrs_end; s++) {
	74	if (strcmp(".ARM.exidx.init.text", secstrings + s->sh_name) == 0)
	75	mod->arch.unw_sec_init = s;
	76	else if (strcmp(".ARM.exidx.devinit.text", secstrings + s->sh_name) == 0)
	77	mod->arch.unw_sec_devinit = s;
	78	else if (strcmp(".ARM.exidx", secstrings + s->sh_name) == 0)
	79	mod->arch.unw_sec_core = s;
	80	else if (strcmp(".init.text", secstrings + s->sh_name) == 0)
	81	mod->arch.sec_init_text = s;
	82	else if (strcmp(".devinit.text", secstrings + s->sh_name) == 0)
	83	mod->arch.sec_devinit_text = s;
	84	else if (strcmp(".text", secstrings + s->sh_name) == 0)
	85	mod->arch.sec_core_text = s;
	86	}
	87	#endif
1da177e4 LT	88	return 0;
	89	}
	90
	91	int
	92	apply_relocate(Elf32_Shdr sechdrs, const char strtab, unsigned int symindex,
	93	unsigned int relindex, struct module *module)
	94	{
	95	Elf32_Shdr *symsec = sechdrs + symindex;
	96	Elf32_Shdr *relsec = sechdrs + relindex;
	97	Elf32_Shdr *dstsec = sechdrs + relsec->sh_info;
	98	Elf32_Rel rel = (void )relsec->sh_addr;
	99	unsigned int i;
	100
	101	for (i = 0; i < relsec->sh_size / sizeof(Elf32_Rel); i++, rel++) {
	102	unsigned long loc;
	103	Elf32_Sym *sym;
	104	s32 offset;
adca6dc2	105	u32 upper, lower, sign, j1, j2;
1da177e4 LT	106
	107	offset = ELF32_R_SYM(rel->r_info);
	108	if (offset < 0 \|\| offset > (symsec->sh_size / sizeof(Elf32_Sym))) {
	109	printk(KERN_ERR "%s: bad relocation, section %d reloc %d\n",
	110	module->name, relindex, i);
	111	return -ENOEXEC;
	112	}
	113
	114	sym = ((Elf32_Sym *)symsec->sh_addr) + offset;
	115
	116	if (rel->r_offset < 0 \|\| rel->r_offset > dstsec->sh_size - sizeof(u32)) {
	117	printk(KERN_ERR "%s: out of bounds relocation, "
	118	"section %d reloc %d offset %d size %d\n",
	119	module->name, relindex, i, rel->r_offset,
	120	dstsec->sh_size);
	121	return -ENOEXEC;
	122	}
	123
	124	loc = dstsec->sh_addr + rel->r_offset;
	125
	126	switch (ELF32_R_TYPE(rel->r_info)) {
2e1926e7 CM	127	case R_ARM_NONE:
	128	/* ignore */
	129	break;
	130
1da177e4 LT	131	case R_ARM_ABS32:
	132	(u32 )loc += sym->st_value;
	133	break;
	134
	135	case R_ARM_PC24:
c2e26114 DJ	136	case R_ARM_CALL:
c2e26114 DJ	137	case R_ARM_JUMP24:
1da177e4 LT	138	offset = ((u32 )loc & 0x00ffffff) << 2;
	139	if (offset & 0x02000000)
	140	offset -= 0x04000000;
	141
	142	offset += sym->st_value - loc;
	143	if (offset & 3 \|\|
c5f12503 KW	144	offset <= (s32)0xfe000000 \|\|
c5f12503 KW	145	offset >= (s32)0x02000000) {
1da177e4 LT	146	printk(KERN_ERR
	147	"%s: relocation out of range, section "
	148	"%d reloc %d sym '%s'\n", module->name,
	149	relindex, i, strtab + sym->st_name);
	150	return -ENOEXEC;
	151	}
	152
	153	offset >>= 2;
	154
	155	(u32 )loc &= 0xff000000;
	156	(u32 )loc \|= offset & 0x00ffffff;
	157	break;
	158
4731f8b6 DS	159	case R_ARM_V4BX:
	160	/* Preserve Rm and the condition code. Alter
	161	* other bits to re-code instruction as
	162	* MOV PC,Rm.
	163	*/
	164	(u32 )loc &= 0xf000000f;
	165	(u32 )loc \|= 0x01a0f000;
	166	break;
	167
2e1926e7 CM	168	case R_ARM_PREL31:
	169	offset = (u32 )loc + sym->st_value - loc;
	170	(u32 )loc = offset & 0x7fffffff;
	171	break;
	172
ae51e609 PG	173	case R_ARM_MOVW_ABS_NC:
	174	case R_ARM_MOVT_ABS:
	175	offset = (u32 )loc;
	176	offset = ((offset & 0xf0000) >> 4) \| (offset & 0xfff);
	177	offset = (offset ^ 0x8000) - 0x8000;
	178
	179	offset += sym->st_value;
	180	if (ELF32_R_TYPE(rel->r_info) == R_ARM_MOVT_ABS)
	181	offset >>= 16;
	182
	183	(u32 )loc &= 0xfff0f000;
	184	(u32 )loc \|= ((offset & 0xf000) << 4) \|
	185	(offset & 0x0fff);
	186	break;
	187
adca6dc2 CM	188	case R_ARM_THM_CALL:
	189	case R_ARM_THM_JUMP24:
	190	upper = (u16 )loc;
	191	lower = (u16 )(loc + 2);
	192
	193	/*
	194	* 25 bit signed address range (Thumb-2 BL and B.W
	195	* instructions):
	196	* S:I1:I2:imm10:imm11:0
	197	* where:
	198	* S = upper[10] = offset[24]
	199	* I1 = ~(J1 ^ S) = offset[23]
	200	* I2 = ~(J2 ^ S) = offset[22]
	201	* imm10 = upper[9:0] = offset[21:12]
	202	* imm11 = lower[10:0] = offset[11:1]
	203	* J1 = lower[13]
	204	* J2 = lower[11]
	205	*/
	206	sign = (upper >> 10) & 1;
	207	j1 = (lower >> 13) & 1;
	208	j2 = (lower >> 11) & 1;
	209	offset = (sign << 24) \| ((~(j1 ^ sign) & 1) << 23) \|
	210	((~(j2 ^ sign) & 1) << 22) \|
	211	((upper & 0x03ff) << 12) \|
	212	((lower & 0x07ff) << 1);
	213	if (offset & 0x01000000)
	214	offset -= 0x02000000;
	215	offset += sym->st_value - loc;
	216
	217	/* only Thumb addresses allowed (no interworking) */
	218	if (!(offset & 1) \|\|
	219	offset <= (s32)0xff000000 \|\|
	220	offset >= (s32)0x01000000) {
	221	printk(KERN_ERR
	222	"%s: relocation out of range, section "
	223	"%d reloc %d sym '%s'\n", module->name,
	224	relindex, i, strtab + sym->st_name);
	225	return -ENOEXEC;
	226	}
	227
	228	sign = (offset >> 24) & 1;
	229	j1 = sign ^ (~(offset >> 23) & 1);
	230	j2 = sign ^ (~(offset >> 22) & 1);
	231	(u16 )loc = (u16)((upper & 0xf800) \| (sign << 10) \|
	232	((offset >> 12) & 0x03ff));
	233	(u16 )(loc + 2) = (u16)((lower & 0xd000) \|
	234	(j1 << 13) \| (j2 << 11) \|
	235	((offset >> 1) & 0x07ff));
adca6dc2 CM	236	break;
adca6dc2 CM	237
8dd47741 CM	238	case R_ARM_THM_MOVW_ABS_NC:
	239	case R_ARM_THM_MOVT_ABS:
	240	upper = (u16 )loc;
	241	lower = (u16 )(loc + 2);
	242
	243	/*
	244	* MOVT/MOVW instructions encoding in Thumb-2:
	245	*
	246	* i = upper[10]
	247	* imm4 = upper[3:0]
	248	* imm3 = lower[14:12]
	249	* imm8 = lower[7:0]
	250	*
	251	* imm16 = imm4:i:imm3:imm8
	252	*/
	253	offset = ((upper & 0x000f) << 12) \|
	254	((upper & 0x0400) << 1) \|
	255	((lower & 0x7000) >> 4) \| (lower & 0x00ff);
	256	offset = (offset ^ 0x8000) - 0x8000;
	257	offset += sym->st_value;
	258
	259	if (ELF32_R_TYPE(rel->r_info) == R_ARM_THM_MOVT_ABS)
	260	offset >>= 16;
	261
	262	(u16 )loc = (u16)((upper & 0xfbf0) \|
	263	((offset & 0xf000) >> 12) \|
	264	((offset & 0x0800) >> 1));
	265	(u16 )(loc + 2) = (u16)((lower & 0x8f00) \|
	266	((offset & 0x0700) << 4) \|
	267	(offset & 0x00ff));
	268	break;
	269
1da177e4 LT	270	default:
	271	printk(KERN_ERR "%s: unknown relocation: %u\n",
	272	module->name, ELF32_R_TYPE(rel->r_info));
	273	return -ENOEXEC;
	274	}
	275	}
	276	return 0;
	277	}
	278
	279	int
	280	apply_relocate_add(Elf32_Shdr sechdrs, const char strtab,
	281	unsigned int symindex, unsigned int relsec, struct module *module)
	282	{
	283	printk(KERN_ERR "module %s: ADD RELOCATION unsupported\n",
	284	module->name);
	285	return -ENOEXEC;
	286	}
	287
2e1926e7 CM	288	#ifdef CONFIG_ARM_UNWIND
	289	static void register_unwind_tables(struct module *mod)
	290	{
	291	if (mod->arch.unw_sec_init && mod->arch.sec_init_text)
	292	mod->arch.unwind_init =
	293	unwind_table_add(mod->arch.unw_sec_init->sh_addr,
	294	mod->arch.unw_sec_init->sh_size,
	295	mod->arch.sec_init_text->sh_addr,
	296	mod->arch.sec_init_text->sh_size);
	297	if (mod->arch.unw_sec_devinit && mod->arch.sec_devinit_text)
	298	mod->arch.unwind_devinit =
	299	unwind_table_add(mod->arch.unw_sec_devinit->sh_addr,
	300	mod->arch.unw_sec_devinit->sh_size,
	301	mod->arch.sec_devinit_text->sh_addr,
	302	mod->arch.sec_devinit_text->sh_size);
	303	if (mod->arch.unw_sec_core && mod->arch.sec_core_text)
	304	mod->arch.unwind_core =
	305	unwind_table_add(mod->arch.unw_sec_core->sh_addr,
	306	mod->arch.unw_sec_core->sh_size,
	307	mod->arch.sec_core_text->sh_addr,
	308	mod->arch.sec_core_text->sh_size);
	309	}
	310
	311	static void unregister_unwind_tables(struct module *mod)
	312	{
	313	unwind_table_del(mod->arch.unwind_init);
	314	unwind_table_del(mod->arch.unwind_devinit);
	315	unwind_table_del(mod->arch.unwind_core);
	316	}
	317	#else
	318	static inline void register_unwind_tables(struct module *mod) { }
	319	static inline void unregister_unwind_tables(struct module *mod) { }
	320	#endif
	321
1da177e4 LT	322	int
	323	module_finalize(const Elf32_Ehdr hdr, const Elf_Shdr sechdrs,
	324	struct module *module)
	325	{
2e1926e7	326	register_unwind_tables(module);
1da177e4 LT	327	return 0;
	328	}
	329
	330	void
	331	module_arch_cleanup(struct module *mod)
	332	{
2e1926e7	333	unregister_unwind_tables(mod);
1da177e4	334	}