[deliverable/linux.git] / arch / sparc / kernel / module.c

/* Kernel module help for sparc64.
 *
 * Copyright (C) 2001 Rusty Russell.
 * Copyright (C) 2002 David S. Miller.
 */

#include <linux/moduleloader.h>
#include <linux/kernel.h>
#include <linux/elf.h>
#include <linux/vmalloc.h>
#include <linux/fs.h>
#include <linux/string.h>
#include <linux/ctype.h>
#include <linux/slab.h>
#include <linux/mm.h>

#include <asm/processor.h>
#include <asm/spitfire.h>

#ifdef CONFIG_SPARC64
static void *module_map(unsigned long size)
{
	struct vm_struct *area;

	size = PAGE_ALIGN(size);
	if (!size || size > MODULES_LEN)
		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);
}

static char *dot2underscore(char *name)
{
	return name;
}
#else
static void *module_map(unsigned long size)
{
	return vmalloc(size);
}

/* Replace references to .func with _Func */
static char *dot2underscore(char *name)
{
	if (name[0] == '.') {
		name[0] = '_';
                name[1] = toupper(name[1]);
	}
	return name;
}
#endif /* CONFIG_SPARC64 */

void *module_alloc(unsigned long size)
{
	void *ret;

	/* We handle the zero case fine, unlike vmalloc */
	if (size == 0)
		return NULL;

	ret = module_map(size);
	if (!ret)
		ret = ERR_PTR(-ENOMEM);
	else
		memset(ret, 0, size);

	return ret;
}

/* Free memory returned from module_core_alloc/module_init_alloc */
void module_free(struct module *mod, void *module_region)
{
	vfree(module_region);
	/* FIXME: If module_region == mod->init_region, trim exception
           table entries. */
}

/* Make generic code ignore STT_REGISTER dummy undefined symbols.  */
int module_frob_arch_sections(Elf_Ehdr *hdr,
			      Elf_Shdr *sechdrs,
			      char *secstrings,
			      struct module *mod)
{
	unsigned int symidx;
	Elf_Sym *sym;
	char *strtab;
	int i;

	for (symidx = 0; sechdrs[symidx].sh_type != SHT_SYMTAB; symidx++) {
		if (symidx == hdr->e_shnum-1) {
			printk("%s: no symtab found.\n", mod->name);
			return -ENOEXEC;
		}
	}
	sym = (Elf_Sym *)sechdrs[symidx].sh_addr;
	strtab = (char *)sechdrs[sechdrs[symidx].sh_link].sh_addr;

	for (i = 1; i < sechdrs[symidx].sh_size / sizeof(Elf_Sym); i++) {
		if (sym[i].st_shndx == SHN_UNDEF) {
			if (ELF_ST_TYPE(sym[i].st_info) == STT_REGISTER) {
				sym[i].st_shndx = SHN_ABS;
			} else {
				char *name = strtab + sym[i].st_name;
				dot2underscore(name);
			}
		}
	}
	return 0;
}

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

int apply_relocate_add(Elf_Shdr *sechdrs,
		       const char *strtab,
		       unsigned int symindex,
		       unsigned int relsec,
		       struct module *me)
{
	unsigned int i;
	Elf_Rela *rel = (void *)sechdrs[relsec].sh_addr;
	Elf_Sym *sym;
	u8 *location;
	u32 *loc32;

	for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rel); i++) {
		Elf_Addr v;

		/* This is where to make the change */
		location = (u8 *)sechdrs[sechdrs[relsec].sh_info].sh_addr
			+ rel[i].r_offset;
		loc32 = (u32 *) location;

#ifdef CONFIG_SPARC64
		BUG_ON(((u64)location >> (u64)32) != (u64)0);
#endif /* CONFIG_SPARC64 */

		/* This is the symbol it is referring to.  Note that all
		   undefined symbols have been resolved.  */
		sym = (Elf_Sym *)sechdrs[symindex].sh_addr
			+ ELF_R_SYM(rel[i].r_info);
		v = sym->st_value + rel[i].r_addend;

		switch (ELF_R_TYPE(rel[i].r_info) & 0xff) {
#ifdef CONFIG_SPARC64
		case R_SPARC_64:
			location[0] = v >> 56;
			location[1] = v >> 48;
			location[2] = v >> 40;
			location[3] = v >> 32;
			location[4] = v >> 24;
			location[5] = v >> 16;
			location[6] = v >>  8;
			location[7] = v >>  0;
			break;

		case R_SPARC_DISP32:
			v -= (Elf_Addr) location;
			*loc32 = v;
			break;

		case R_SPARC_WDISP19:
			v -= (Elf_Addr) location;
			*loc32 = (*loc32 & ~0x7ffff) |
				((v >> 2) & 0x7ffff);
			break;

		case R_SPARC_OLO10:
			*loc32 = (*loc32 & ~0x1fff) |
				(((v & 0x3ff) +
				  (ELF_R_TYPE(rel[i].r_info) >> 8))
				 & 0x1fff);
			break;
#endif /* CONFIG_SPARC64 */

		case R_SPARC_32:
		case R_SPARC_UA32:
			location[0] = v >> 24;
			location[1] = v >> 16;
			location[2] = v >>  8;
			location[3] = v >>  0;
			break;

		case R_SPARC_WDISP30:
			v -= (Elf_Addr) location;
			*loc32 = (*loc32 & ~0x3fffffff) |
				((v >> 2) & 0x3fffffff);
			break;

		case R_SPARC_WDISP22:
			v -= (Elf_Addr) location;
			*loc32 = (*loc32 & ~0x3fffff) |
				((v >> 2) & 0x3fffff);
			break;

		case R_SPARC_LO10:
			*loc32 = (*loc32 & ~0x3ff) | (v & 0x3ff);
			break;

		case R_SPARC_HI22:
			*loc32 = (*loc32 & ~0x3fffff) |
				((v >> 10) & 0x3fffff);
			break;

		default:
			printk(KERN_ERR "module %s: Unknown relocation: %x\n",
			       me->name,
			       (int) (ELF_R_TYPE(rel[i].r_info) & 0xff));
			return -ENOEXEC;
		};
	}
	return 0;
}

#ifdef CONFIG_SPARC64
int module_finalize(const Elf_Ehdr *hdr,
		    const Elf_Shdr *sechdrs,
		    struct module *me)
{
	/* Cheetah's I-cache is fully coherent.  */
	if (tlb_type == spitfire) {
		unsigned long va;

		flushw_all();
		for (va =  0; va < (PAGE_SIZE << 1); va += 32)
			spitfire_put_icache_tag(va, 0x0);
		__asm__ __volatile__("flush %g6");
	}

	return 0;
}
#else
int module_finalize(const Elf_Ehdr *hdr,
                    const Elf_Shdr *sechdrs,
                    struct module *me)
{
        return 0;
}
#endif /* CONFIG_SPARC64 */

void module_arch_cleanup(struct module *mod)
{
}
Commit	Line	Data
1da177e4 LT	1	/* Kernel module help for sparc64.
	2	*
	3	* Copyright (C) 2001 Rusty Russell.
	4	* Copyright (C) 2002 David S. Miller.
	5	*/
	6
	7	#include <linux/moduleloader.h>
	8	#include <linux/kernel.h>
	9	#include <linux/elf.h>
	10	#include <linux/vmalloc.h>
	11	#include <linux/fs.h>
	12	#include <linux/string.h>
e6b04fe0	13	#include <linux/ctype.h>
1da177e4	14	#include <linux/slab.h>
1da177e4 LT	15	#include <linux/mm.h>
	16
	17	#include <asm/processor.h>
	18	#include <asm/spitfire.h>
	19
627bf2f6	20	#ifdef CONFIG_SPARC64
1da177e4 LT	21	static void *module_map(unsigned long size)
	22	{
	23	struct vm_struct *area;
	24
	25	size = PAGE_ALIGN(size);
	26	if (!size \|\| size > MODULES_LEN)
	27	return NULL;
	28
	29	area = __get_vm_area(size, VM_ALLOC, MODULES_VADDR, MODULES_END);
	30	if (!area)
	31	return NULL;
	32
	33	return __vmalloc_area(area, GFP_KERNEL, PAGE_KERNEL);
	34	}
	35
627bf2f6 SR	36	static char dot2underscore(char name)
	37	{
	38	return name;
	39	}
e6b04fe0 SR	40	#else
	41	static void *module_map(unsigned long size)
	42	{
	43	return vmalloc(size);
	44	}
	45
	46	/* Replace references to .func with _Func */
	47	static char dot2underscore(char name)
	48	{
	49	if (name[0] == '.') {
	50	name[0] = '_';
	51	name[1] = toupper(name[1]);
	52	}
	53	return name;
	54	}
627bf2f6 SR	55	#endif /* CONFIG_SPARC64 */
627bf2f6 SR	56
1da177e4 LT	57	void *module_alloc(unsigned long size)
	58	{
	59	void *ret;
	60
	61	/* We handle the zero case fine, unlike vmalloc */
	62	if (size == 0)
	63	return NULL;
	64
	65	ret = module_map(size);
	66	if (!ret)
	67	ret = ERR_PTR(-ENOMEM);
	68	else
	69	memset(ret, 0, size);
	70
	71	return ret;
	72	}
	73
	74	/* Free memory returned from module_core_alloc/module_init_alloc */
	75	void module_free(struct module mod, void module_region)
	76	{
	77	vfree(module_region);
	78	/* FIXME: If module_region == mod->init_region, trim exception
	79	table entries. */
	80	}
	81
	82	/* Make generic code ignore STT_REGISTER dummy undefined symbols. */
	83	int module_frob_arch_sections(Elf_Ehdr *hdr,
	84	Elf_Shdr *sechdrs,
	85	char *secstrings,
	86	struct module *mod)
	87	{
	88	unsigned int symidx;
c45d1c20	89	Elf_Sym *sym;
627bf2f6	90	char *strtab;
1da177e4 LT	91	int i;
	92
	93	for (symidx = 0; sechdrs[symidx].sh_type != SHT_SYMTAB; symidx++) {
	94	if (symidx == hdr->e_shnum-1) {
	95	printk("%s: no symtab found.\n", mod->name);
	96	return -ENOEXEC;
	97	}
	98	}
c45d1c20	99	sym = (Elf_Sym *)sechdrs[symidx].sh_addr;
1da177e4 LT	100	strtab = (char *)sechdrs[sechdrs[symidx].sh_link].sh_addr;
	101
	102	for (i = 1; i < sechdrs[symidx].sh_size / sizeof(Elf_Sym); i++) {
627bf2f6 SR	103	if (sym[i].st_shndx == SHN_UNDEF) {
	104	if (ELF_ST_TYPE(sym[i].st_info) == STT_REGISTER) {
	105	sym[i].st_shndx = SHN_ABS;
	106	} else {
	107	char *name = strtab + sym[i].st_name;
	108	dot2underscore(name);
	109	}
	110	}
1da177e4 LT	111	}
	112	return 0;
	113	}
	114
c45d1c20	115	int apply_relocate(Elf_Shdr *sechdrs,
1da177e4 LT	116	const char *strtab,
	117	unsigned int symindex,
	118	unsigned int relsec,
	119	struct module *me)
	120	{
	121	printk(KERN_ERR "module %s: non-ADD RELOCATION unsupported\n",
	122	me->name);
	123	return -ENOEXEC;
	124	}
	125
c45d1c20	126	int apply_relocate_add(Elf_Shdr *sechdrs,
1da177e4 LT	127	const char *strtab,
	128	unsigned int symindex,
	129	unsigned int relsec,
	130	struct module *me)
	131	{
	132	unsigned int i;
c45d1c20 SR	133	Elf_Rela rel = (void )sechdrs[relsec].sh_addr;
c45d1c20 SR	134	Elf_Sym *sym;
1da177e4 LT	135	u8 *location;
	136	u32 *loc32;
	137
	138	for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rel); i++) {
c45d1c20	139	Elf_Addr v;
1da177e4 LT	140
	141	/* This is where to make the change */
	142	location = (u8 *)sechdrs[sechdrs[relsec].sh_info].sh_addr
	143	+ rel[i].r_offset;
	144	loc32 = (u32 *) location;
	145
627bf2f6	146	#ifdef CONFIG_SPARC64
1da177e4	147	BUG_ON(((u64)location >> (u64)32) != (u64)0);
627bf2f6	148	#endif /* CONFIG_SPARC64 */
1da177e4 LT	149
	150	/* This is the symbol it is referring to. Note that all
	151	undefined symbols have been resolved. */
c45d1c20 SR	152	sym = (Elf_Sym *)sechdrs[symindex].sh_addr
c45d1c20 SR	153	+ ELF_R_SYM(rel[i].r_info);
1da177e4 LT	154	v = sym->st_value + rel[i].r_addend;
1da177e4 LT	155
c45d1c20	156	switch (ELF_R_TYPE(rel[i].r_info) & 0xff) {
627bf2f6	157	#ifdef CONFIG_SPARC64
1da177e4 LT	158	case R_SPARC_64:
	159	location[0] = v >> 56;
	160	location[1] = v >> 48;
	161	location[2] = v >> 40;
	162	location[3] = v >> 32;
	163	location[4] = v >> 24;
	164	location[5] = v >> 16;
	165	location[6] = v >> 8;
	166	location[7] = v >> 0;
	167	break;
	168
627bf2f6 SR	169	case R_SPARC_DISP32:
	170	v -= (Elf_Addr) location;
	171	*loc32 = v;
	172	break;
	173
	174	case R_SPARC_WDISP19:
	175	v -= (Elf_Addr) location;
	176	loc32 = (loc32 & ~0x7ffff) \|
	177	((v >> 2) & 0x7ffff);
	178	break;
	179
	180	case R_SPARC_OLO10:
	181	loc32 = (loc32 & ~0x1fff) \|
	182	(((v & 0x3ff) +
	183	(ELF_R_TYPE(rel[i].r_info) >> 8))
	184	& 0x1fff);
	185	break;
	186	#endif /* CONFIG_SPARC64 */
	187
1da177e4	188	case R_SPARC_32:
e6b04fe0	189	case R_SPARC_UA32:
1da177e4 LT	190	location[0] = v >> 24;
	191	location[1] = v >> 16;
	192	location[2] = v >> 8;
	193	location[3] = v >> 0;
	194	break;
	195
	196	case R_SPARC_WDISP30:
c45d1c20	197	v -= (Elf_Addr) location;
1da177e4 LT	198	loc32 = (loc32 & ~0x3fffffff) \|
	199	((v >> 2) & 0x3fffffff);
	200	break;
	201
	202	case R_SPARC_WDISP22:
c45d1c20	203	v -= (Elf_Addr) location;
1da177e4 LT	204	loc32 = (loc32 & ~0x3fffff) \|
	205	((v >> 2) & 0x3fffff);
	206	break;
	207
1da177e4 LT	208	case R_SPARC_LO10:
	209	loc32 = (loc32 & ~0x3ff) \| (v & 0x3ff);
	210	break;
	211
	212	case R_SPARC_HI22:
	213	loc32 = (loc32 & ~0x3fffff) \|
	214	((v >> 10) & 0x3fffff);
	215	break;
	216
1da177e4 LT	217	default:
	218	printk(KERN_ERR "module %s: Unknown relocation: %x\n",
	219	me->name,
c45d1c20	220	(int) (ELF_R_TYPE(rel[i].r_info) & 0xff));
1da177e4 LT	221	return -ENOEXEC;
	222	};
	223	}
	224	return 0;
	225	}
	226
627bf2f6	227	#ifdef CONFIG_SPARC64
1da177e4 LT	228	int module_finalize(const Elf_Ehdr *hdr,
	229	const Elf_Shdr *sechdrs,
	230	struct module *me)
	231	{
	232	/* Cheetah's I-cache is fully coherent. */
	233	if (tlb_type == spitfire) {
	234	unsigned long va;
	235
	236	flushw_all();
	237	for (va = 0; va < (PAGE_SIZE << 1); va += 32)
	238	spitfire_put_icache_tag(va, 0x0);
	239	__asm__ __volatile__("flush %g6");
	240	}
	241
	242	return 0;
	243	}
e6b04fe0 SR	244	#else
	245	int module_finalize(const Elf_Ehdr *hdr,
	246	const Elf_Shdr *sechdrs,
	247	struct module *me)
	248	{
	249	return 0;
	250	}
627bf2f6	251	#endif /* CONFIG_SPARC64 */
1da177e4 LT	252
	253	void module_arch_cleanup(struct module *mod)
	254	{
	255	}