[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/smp_plat.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)
{
	return __vmalloc_node_range(size, 1, MODULES_VADDR, MODULES_END,
				GFP_KERNEL, PAGE_KERNEL_EXEC, -1,
				__builtin_return_address(0));
}
#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)
{
	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;
#ifdef CONFIG_THUMB2_KERNEL
		u32 upper, lower, sign, j1, j2;
#endif

		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;

#ifdef CONFIG_THUMB2_KERNEL
		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;
#endif

		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;
}

struct mod_unwind_map {
	const Elf_Shdr *unw_sec;
	const Elf_Shdr *txt_sec;
};

static const Elf_Shdr *find_mod_section(const Elf32_Ehdr *hdr,
	const Elf_Shdr *sechdrs, const char *name)
{
	const Elf_Shdr *s, *se;
	const char *secstrs = (void *)hdr + sechdrs[hdr->e_shstrndx].sh_offset;

	for (s = sechdrs, se = sechdrs + hdr->e_shnum; s < se; s++)
		if (strcmp(name, secstrs + s->sh_name) == 0)
			return s;

	return NULL;
}

extern void fixup_smp(const void *, unsigned long);

int module_finalize(const Elf32_Ehdr *hdr, const Elf_Shdr *sechdrs,
		    struct module *mod)
{
	const Elf_Shdr * __maybe_unused s = NULL;
#ifdef CONFIG_ARM_UNWIND
	const char *secstrs = (void *)hdr + sechdrs[hdr->e_shstrndx].sh_offset;
	const Elf_Shdr *sechdrs_end = sechdrs + hdr->e_shnum;
	struct mod_unwind_map maps[ARM_SEC_MAX];
	int i;

	memset(maps, 0, sizeof(maps));

	for (s = sechdrs; s < sechdrs_end; s++) {
		const char *secname = secstrs + s->sh_name;

		if (!(s->sh_flags & SHF_ALLOC))
			continue;

		if (strcmp(".ARM.exidx.init.text", secname) == 0)
			maps[ARM_SEC_INIT].unw_sec = s;
		else if (strcmp(".ARM.exidx.devinit.text", secname) == 0)
			maps[ARM_SEC_DEVINIT].unw_sec = s;
		else if (strcmp(".ARM.exidx", secname) == 0)
			maps[ARM_SEC_CORE].unw_sec = s;
		else if (strcmp(".ARM.exidx.exit.text", secname) == 0)
			maps[ARM_SEC_EXIT].unw_sec = s;
		else if (strcmp(".ARM.exidx.devexit.text", secname) == 0)
			maps[ARM_SEC_DEVEXIT].unw_sec = s;
		else if (strcmp(".init.text", secname) == 0)
			maps[ARM_SEC_INIT].txt_sec = s;
		else if (strcmp(".devinit.text", secname) == 0)
			maps[ARM_SEC_DEVINIT].txt_sec = s;
		else if (strcmp(".text", secname) == 0)
			maps[ARM_SEC_CORE].txt_sec = s;
		else if (strcmp(".exit.text", secname) == 0)
			maps[ARM_SEC_EXIT].txt_sec = s;
		else if (strcmp(".devexit.text", secname) == 0)
			maps[ARM_SEC_DEVEXIT].txt_sec = s;
	}

	for (i = 0; i < ARM_SEC_MAX; i++)
		if (maps[i].unw_sec && maps[i].txt_sec)
			mod->arch.unwind[i] =
				unwind_table_add(maps[i].unw_sec->sh_addr,
					         maps[i].unw_sec->sh_size,
					         maps[i].txt_sec->sh_addr,
					         maps[i].txt_sec->sh_size);
#endif
	s = find_mod_section(hdr, sechdrs, ".alt.smp.init");
	if (s && !is_smp())
		fixup_smp((void *)s->sh_addr, s->sh_size);
	return 0;
}

void
module_arch_cleanup(struct module *mod)
{
#ifdef CONFIG_ARM_UNWIND
	int i;

	for (i = 0; i < ARM_SEC_MAX; i++)
		if (mod->arch.unwind[i])
			unwind_table_del(mod->arch.unwind[i]);
#endif
}
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>
4a9cb360	25	#include <asm/smp_plat.h>
2e1926e7	26	#include <asm/unwind.h>
1da177e4 LT	27
	28	#ifdef CONFIG_XIP_KERNEL
	29	/*
	30	* The XIP kernel text is mapped in the module area for modules and
	31	* some other stuff to work without any indirect relocations.
ab4f2ee1	32	* MODULES_VADDR is redefined here and not in asm/memory.h to avoid
1da177e4 LT	33	* recompiling the whole kernel when CONFIG_XIP_KERNEL is turned on/off.
1da177e4 LT	34	*/
ab4f2ee1	35	#undef MODULES_VADDR
37efe642	36	#define MODULES_VADDR (((unsigned long)_etext + ~PGDIR_MASK) & PGDIR_MASK)
1da177e4 LT	37	#endif
1da177e4 LT	38
6a570b28	39	#ifdef CONFIG_MMU
1da177e4 LT	40	void *module_alloc(unsigned long size)
1da177e4 LT	41	{
d0a21265 DR	42	return __vmalloc_node_range(size, 1, MODULES_VADDR, MODULES_END,
	43	GFP_KERNEL, PAGE_KERNEL_EXEC, -1,
	44	__builtin_return_address(0));
1da177e4	45	}
6a570b28 HC	46	#else /* CONFIG_MMU */
	47	void *module_alloc(unsigned long size)
	48	{
	49	return size == 0 ? NULL : vmalloc(size);
	50	}
	51	#endif /* !CONFIG_MMU */
1da177e4 LT	52
	53	void module_free(struct module module, void region)
	54	{
	55	vfree(region);
	56	}
	57
	58	int module_frob_arch_sections(Elf_Ehdr *hdr,
	59	Elf_Shdr *sechdrs,
	60	char *secstrings,
	61	struct module *mod)
	62	{
	63	return 0;
	64	}
	65
	66	int
	67	apply_relocate(Elf32_Shdr sechdrs, const char strtab, unsigned int symindex,
	68	unsigned int relindex, struct module *module)
	69	{
	70	Elf32_Shdr *symsec = sechdrs + symindex;
	71	Elf32_Shdr *relsec = sechdrs + relindex;
	72	Elf32_Shdr *dstsec = sechdrs + relsec->sh_info;
	73	Elf32_Rel rel = (void )relsec->sh_addr;
	74	unsigned int i;
	75
	76	for (i = 0; i < relsec->sh_size / sizeof(Elf32_Rel); i++, rel++) {
	77	unsigned long loc;
	78	Elf32_Sym *sym;
	79	s32 offset;
b7493156	80	#ifdef CONFIG_THUMB2_KERNEL
adca6dc2	81	u32 upper, lower, sign, j1, j2;
b7493156	82	#endif
1da177e4 LT	83
	84	offset = ELF32_R_SYM(rel->r_info);
	85	if (offset < 0 \|\| offset > (symsec->sh_size / sizeof(Elf32_Sym))) {
	86	printk(KERN_ERR "%s: bad relocation, section %d reloc %d\n",
	87	module->name, relindex, i);
	88	return -ENOEXEC;
	89	}
	90
	91	sym = ((Elf32_Sym *)symsec->sh_addr) + offset;
	92
	93	if (rel->r_offset < 0 \|\| rel->r_offset > dstsec->sh_size - sizeof(u32)) {
	94	printk(KERN_ERR "%s: out of bounds relocation, "
	95	"section %d reloc %d offset %d size %d\n",
	96	module->name, relindex, i, rel->r_offset,
	97	dstsec->sh_size);
	98	return -ENOEXEC;
	99	}
	100
	101	loc = dstsec->sh_addr + rel->r_offset;
	102
	103	switch (ELF32_R_TYPE(rel->r_info)) {
2e1926e7 CM	104	case R_ARM_NONE:
	105	/* ignore */
	106	break;
	107
1da177e4 LT	108	case R_ARM_ABS32:
	109	(u32 )loc += sym->st_value;
	110	break;
	111
	112	case R_ARM_PC24:
c2e26114 DJ	113	case R_ARM_CALL:
c2e26114 DJ	114	case R_ARM_JUMP24:
1da177e4 LT	115	offset = ((u32 )loc & 0x00ffffff) << 2;
	116	if (offset & 0x02000000)
	117	offset -= 0x04000000;
	118
	119	offset += sym->st_value - loc;
	120	if (offset & 3 \|\|
c5f12503 KW	121	offset <= (s32)0xfe000000 \|\|
c5f12503 KW	122	offset >= (s32)0x02000000) {
1da177e4 LT	123	printk(KERN_ERR
	124	"%s: relocation out of range, section "
	125	"%d reloc %d sym '%s'\n", module->name,
	126	relindex, i, strtab + sym->st_name);
	127	return -ENOEXEC;
	128	}
	129
	130	offset >>= 2;
	131
	132	(u32 )loc &= 0xff000000;
	133	(u32 )loc \|= offset & 0x00ffffff;
	134	break;
	135
4731f8b6 DS	136	case R_ARM_V4BX:
	137	/* Preserve Rm and the condition code. Alter
	138	* other bits to re-code instruction as
	139	* MOV PC,Rm.
	140	*/
	141	(u32 )loc &= 0xf000000f;
	142	(u32 )loc \|= 0x01a0f000;
	143	break;
	144
2e1926e7 CM	145	case R_ARM_PREL31:
	146	offset = (u32 )loc + sym->st_value - loc;
	147	(u32 )loc = offset & 0x7fffffff;
	148	break;
	149
ae51e609 PG	150	case R_ARM_MOVW_ABS_NC:
	151	case R_ARM_MOVT_ABS:
	152	offset = (u32 )loc;
	153	offset = ((offset & 0xf0000) >> 4) \| (offset & 0xfff);
	154	offset = (offset ^ 0x8000) - 0x8000;
	155
	156	offset += sym->st_value;
	157	if (ELF32_R_TYPE(rel->r_info) == R_ARM_MOVT_ABS)
	158	offset >>= 16;
	159
	160	(u32 )loc &= 0xfff0f000;
	161	(u32 )loc \|= ((offset & 0xf000) << 4) \|
	162	(offset & 0x0fff);
	163	break;
	164
b7493156	165	#ifdef CONFIG_THUMB2_KERNEL
adca6dc2 CM	166	case R_ARM_THM_CALL:
	167	case R_ARM_THM_JUMP24:
	168	upper = (u16 )loc;
	169	lower = (u16 )(loc + 2);
	170
	171	/*
	172	* 25 bit signed address range (Thumb-2 BL and B.W
	173	* instructions):
	174	* S:I1:I2:imm10:imm11:0
	175	* where:
	176	* S = upper[10] = offset[24]
	177	* I1 = ~(J1 ^ S) = offset[23]
	178	* I2 = ~(J2 ^ S) = offset[22]
	179	* imm10 = upper[9:0] = offset[21:12]
	180	* imm11 = lower[10:0] = offset[11:1]
	181	* J1 = lower[13]
	182	* J2 = lower[11]
	183	*/
	184	sign = (upper >> 10) & 1;
	185	j1 = (lower >> 13) & 1;
	186	j2 = (lower >> 11) & 1;
	187	offset = (sign << 24) \| ((~(j1 ^ sign) & 1) << 23) \|
	188	((~(j2 ^ sign) & 1) << 22) \|
	189	((upper & 0x03ff) << 12) \|
	190	((lower & 0x07ff) << 1);
	191	if (offset & 0x01000000)
	192	offset -= 0x02000000;
	193	offset += sym->st_value - loc;
	194
	195	/* only Thumb addresses allowed (no interworking) */
	196	if (!(offset & 1) \|\|
	197	offset <= (s32)0xff000000 \|\|
	198	offset >= (s32)0x01000000) {
	199	printk(KERN_ERR
	200	"%s: relocation out of range, section "
	201	"%d reloc %d sym '%s'\n", module->name,
	202	relindex, i, strtab + sym->st_name);
	203	return -ENOEXEC;
	204	}
	205
	206	sign = (offset >> 24) & 1;
	207	j1 = sign ^ (~(offset >> 23) & 1);
	208	j2 = sign ^ (~(offset >> 22) & 1);
	209	(u16 )loc = (u16)((upper & 0xf800) \| (sign << 10) \|
	210	((offset >> 12) & 0x03ff));
	211	(u16 )(loc + 2) = (u16)((lower & 0xd000) \|
	212	(j1 << 13) \| (j2 << 11) \|
	213	((offset >> 1) & 0x07ff));
adca6dc2 CM	214	break;
adca6dc2 CM	215
8dd47741 CM	216	case R_ARM_THM_MOVW_ABS_NC:
	217	case R_ARM_THM_MOVT_ABS:
	218	upper = (u16 )loc;
	219	lower = (u16 )(loc + 2);
	220
	221	/*
	222	* MOVT/MOVW instructions encoding in Thumb-2:
	223	*
	224	* i = upper[10]
	225	* imm4 = upper[3:0]
	226	* imm3 = lower[14:12]
	227	* imm8 = lower[7:0]
	228	*
	229	* imm16 = imm4:i:imm3:imm8
	230	*/
	231	offset = ((upper & 0x000f) << 12) \|
	232	((upper & 0x0400) << 1) \|
	233	((lower & 0x7000) >> 4) \| (lower & 0x00ff);
	234	offset = (offset ^ 0x8000) - 0x8000;
	235	offset += sym->st_value;
	236
	237	if (ELF32_R_TYPE(rel->r_info) == R_ARM_THM_MOVT_ABS)
	238	offset >>= 16;
	239
	240	(u16 )loc = (u16)((upper & 0xfbf0) \|
	241	((offset & 0xf000) >> 12) \|
	242	((offset & 0x0800) >> 1));
	243	(u16 )(loc + 2) = (u16)((lower & 0x8f00) \|
	244	((offset & 0x0700) << 4) \|
	245	(offset & 0x00ff));
	246	break;
b7493156	247	#endif
8dd47741	248
1da177e4 LT	249	default:
	250	printk(KERN_ERR "%s: unknown relocation: %u\n",
	251	module->name, ELF32_R_TYPE(rel->r_info));
	252	return -ENOEXEC;
	253	}
	254	}
	255	return 0;
	256	}
	257
	258	int
	259	apply_relocate_add(Elf32_Shdr sechdrs, const char strtab,
	260	unsigned int symindex, unsigned int relsec, struct module *module)
	261	{
	262	printk(KERN_ERR "module %s: ADD RELOCATION unsupported\n",
	263	module->name);
	264	return -ENOEXEC;
	265	}
	266
8931360e RK	267	struct mod_unwind_map {
	268	const Elf_Shdr *unw_sec;
	269	const Elf_Shdr *txt_sec;
	270	};
	271
4a9cb360 RK	272	static const Elf_Shdr find_mod_section(const Elf32_Ehdr hdr,
	273	const Elf_Shdr sechdrs, const char name)
	274	{
	275	const Elf_Shdr s, se;
	276	const char secstrs = (void )hdr + sechdrs[hdr->e_shstrndx].sh_offset;
	277
	278	for (s = sechdrs, se = sechdrs + hdr->e_shnum; s < se; s++)
	279	if (strcmp(name, secstrs + s->sh_name) == 0)
	280	return s;
	281
	282	return NULL;
	283	}
	284
	285	extern void fixup_smp(const void *, unsigned long);
	286
8931360e RK	287	int module_finalize(const Elf32_Ehdr hdr, const Elf_Shdr sechdrs,
8931360e RK	288	struct module *mod)
2e1926e7	289	{
4a9cb360	290	const Elf_Shdr * __maybe_unused s = NULL;
8931360e RK	291	#ifdef CONFIG_ARM_UNWIND
8931360e RK	292	const char secstrs = (void )hdr + sechdrs[hdr->e_shstrndx].sh_offset;
4a9cb360	293	const Elf_Shdr *sechdrs_end = sechdrs + hdr->e_shnum;
8931360e	294	struct mod_unwind_map maps[ARM_SEC_MAX];
e5f7772e	295	int i;
8931360e RK	296
	297	memset(maps, 0, sizeof(maps));
	298
	299	for (s = sechdrs; s < sechdrs_end; s++) {
	300	const char *secname = secstrs + s->sh_name;
	301
50005a8d RK	302	if (!(s->sh_flags & SHF_ALLOC))
	303	continue;
	304
8931360e RK	305	if (strcmp(".ARM.exidx.init.text", secname) == 0)
	306	maps[ARM_SEC_INIT].unw_sec = s;
	307	else if (strcmp(".ARM.exidx.devinit.text", secname) == 0)
	308	maps[ARM_SEC_DEVINIT].unw_sec = s;
	309	else if (strcmp(".ARM.exidx", secname) == 0)
	310	maps[ARM_SEC_CORE].unw_sec = s;
	311	else if (strcmp(".ARM.exidx.exit.text", secname) == 0)
	312	maps[ARM_SEC_EXIT].unw_sec = s;
	313	else if (strcmp(".ARM.exidx.devexit.text", secname) == 0)
	314	maps[ARM_SEC_DEVEXIT].unw_sec = s;
	315	else if (strcmp(".init.text", secname) == 0)
	316	maps[ARM_SEC_INIT].txt_sec = s;
	317	else if (strcmp(".devinit.text", secname) == 0)
	318	maps[ARM_SEC_DEVINIT].txt_sec = s;
	319	else if (strcmp(".text", secname) == 0)
	320	maps[ARM_SEC_CORE].txt_sec = s;
	321	else if (strcmp(".exit.text", secname) == 0)
	322	maps[ARM_SEC_EXIT].txt_sec = s;
	323	else if (strcmp(".devexit.text", secname) == 0)
	324	maps[ARM_SEC_DEVEXIT].txt_sec = s;
e5f7772e	325	}
2e1926e7	326
8931360e RK	327	for (i = 0; i < ARM_SEC_MAX; i++)
	328	if (maps[i].unw_sec && maps[i].txt_sec)
	329	mod->arch.unwind[i] =
	330	unwind_table_add(maps[i].unw_sec->sh_addr,
	331	maps[i].unw_sec->sh_size,
	332	maps[i].txt_sec->sh_addr,
	333	maps[i].txt_sec->sh_size);
2e1926e7	334	#endif
4a9cb360 RK	335	s = find_mod_section(hdr, sechdrs, ".alt.smp.init");
	336	if (s && !is_smp())
	337	fixup_smp((void *)s->sh_addr, s->sh_size);
1da177e4 LT	338	return 0;
	339	}
	340
	341	void
	342	module_arch_cleanup(struct module *mod)
	343	{
8931360e RK	344	#ifdef CONFIG_ARM_UNWIND
	345	int i;
	346
	347	for (i = 0; i < ARM_SEC_MAX; i++)
	348	if (mod->arch.unwind[i])
	349	unwind_table_del(mod->arch.unwind[i]);
	350	#endif
1da177e4	351	}