[net-next-2.6.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/gfp.h>
#include <linux/string.h>
#include <linux/ctype.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);
}

/* 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>
5a0e3ad6	12	#include <linux/gfp.h>
1da177e4	13	#include <linux/string.h>
e6b04fe0	14	#include <linux/ctype.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);
1da177e4 LT	78	}
	79
	80	/* Make generic code ignore STT_REGISTER dummy undefined symbols. */
	81	int module_frob_arch_sections(Elf_Ehdr *hdr,
	82	Elf_Shdr *sechdrs,
	83	char *secstrings,
	84	struct module *mod)
	85	{
	86	unsigned int symidx;
c45d1c20	87	Elf_Sym *sym;
627bf2f6	88	char *strtab;
1da177e4 LT	89	int i;
	90
	91	for (symidx = 0; sechdrs[symidx].sh_type != SHT_SYMTAB; symidx++) {
	92	if (symidx == hdr->e_shnum-1) {
	93	printk("%s: no symtab found.\n", mod->name);
	94	return -ENOEXEC;
	95	}
	96	}
c45d1c20	97	sym = (Elf_Sym *)sechdrs[symidx].sh_addr;
1da177e4 LT	98	strtab = (char *)sechdrs[sechdrs[symidx].sh_link].sh_addr;
	99
	100	for (i = 1; i < sechdrs[symidx].sh_size / sizeof(Elf_Sym); i++) {
627bf2f6 SR	101	if (sym[i].st_shndx == SHN_UNDEF) {
	102	if (ELF_ST_TYPE(sym[i].st_info) == STT_REGISTER) {
	103	sym[i].st_shndx = SHN_ABS;
	104	} else {
	105	char *name = strtab + sym[i].st_name;
	106	dot2underscore(name);
	107	}
	108	}
1da177e4 LT	109	}
	110	return 0;
	111	}
	112
c45d1c20	113	int apply_relocate(Elf_Shdr *sechdrs,
1da177e4 LT	114	const char *strtab,
	115	unsigned int symindex,
	116	unsigned int relsec,
	117	struct module *me)
	118	{
	119	printk(KERN_ERR "module %s: non-ADD RELOCATION unsupported\n",
	120	me->name);
	121	return -ENOEXEC;
	122	}
	123
c45d1c20	124	int apply_relocate_add(Elf_Shdr *sechdrs,
1da177e4 LT	125	const char *strtab,
	126	unsigned int symindex,
	127	unsigned int relsec,
	128	struct module *me)
	129	{
	130	unsigned int i;
c45d1c20 SR	131	Elf_Rela rel = (void )sechdrs[relsec].sh_addr;
c45d1c20 SR	132	Elf_Sym *sym;
1da177e4 LT	133	u8 *location;
	134	u32 *loc32;
	135
	136	for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rel); i++) {
c45d1c20	137	Elf_Addr v;
1da177e4 LT	138
	139	/* This is where to make the change */
	140	location = (u8 *)sechdrs[sechdrs[relsec].sh_info].sh_addr
	141	+ rel[i].r_offset;
	142	loc32 = (u32 *) location;
	143
627bf2f6	144	#ifdef CONFIG_SPARC64
1da177e4	145	BUG_ON(((u64)location >> (u64)32) != (u64)0);
627bf2f6	146	#endif /* CONFIG_SPARC64 */
1da177e4 LT	147
	148	/* This is the symbol it is referring to. Note that all
	149	undefined symbols have been resolved. */
c45d1c20 SR	150	sym = (Elf_Sym *)sechdrs[symindex].sh_addr
c45d1c20 SR	151	+ ELF_R_SYM(rel[i].r_info);
1da177e4 LT	152	v = sym->st_value + rel[i].r_addend;
1da177e4 LT	153
c45d1c20	154	switch (ELF_R_TYPE(rel[i].r_info) & 0xff) {
627bf2f6	155	#ifdef CONFIG_SPARC64
1da177e4 LT	156	case R_SPARC_64:
	157	location[0] = v >> 56;
	158	location[1] = v >> 48;
	159	location[2] = v >> 40;
	160	location[3] = v >> 32;
	161	location[4] = v >> 24;
	162	location[5] = v >> 16;
	163	location[6] = v >> 8;
	164	location[7] = v >> 0;
	165	break;
	166
627bf2f6 SR	167	case R_SPARC_DISP32:
	168	v -= (Elf_Addr) location;
	169	*loc32 = v;
	170	break;
	171
	172	case R_SPARC_WDISP19:
	173	v -= (Elf_Addr) location;
	174	loc32 = (loc32 & ~0x7ffff) \|
	175	((v >> 2) & 0x7ffff);
	176	break;
	177
	178	case R_SPARC_OLO10:
	179	loc32 = (loc32 & ~0x1fff) \|
	180	(((v & 0x3ff) +
	181	(ELF_R_TYPE(rel[i].r_info) >> 8))
	182	& 0x1fff);
	183	break;
	184	#endif /* CONFIG_SPARC64 */
	185
1da177e4	186	case R_SPARC_32:
e6b04fe0	187	case R_SPARC_UA32:
1da177e4 LT	188	location[0] = v >> 24;
	189	location[1] = v >> 16;
	190	location[2] = v >> 8;
	191	location[3] = v >> 0;
	192	break;
	193
	194	case R_SPARC_WDISP30:
c45d1c20	195	v -= (Elf_Addr) location;
1da177e4 LT	196	loc32 = (loc32 & ~0x3fffffff) \|
	197	((v >> 2) & 0x3fffffff);
	198	break;
	199
	200	case R_SPARC_WDISP22:
c45d1c20	201	v -= (Elf_Addr) location;
1da177e4 LT	202	loc32 = (loc32 & ~0x3fffff) \|
	203	((v >> 2) & 0x3fffff);
	204	break;
	205
1da177e4 LT	206	case R_SPARC_LO10:
	207	loc32 = (loc32 & ~0x3ff) \| (v & 0x3ff);
	208	break;
	209
	210	case R_SPARC_HI22:
	211	loc32 = (loc32 & ~0x3fffff) \|
	212	((v >> 10) & 0x3fffff);
	213	break;
	214
1da177e4 LT	215	default:
	216	printk(KERN_ERR "module %s: Unknown relocation: %x\n",
	217	me->name,
c45d1c20	218	(int) (ELF_R_TYPE(rel[i].r_info) & 0xff));
1da177e4 LT	219	return -ENOEXEC;
	220	};
	221	}
	222	return 0;
	223	}
	224
627bf2f6	225	#ifdef CONFIG_SPARC64
1da177e4 LT	226	int module_finalize(const Elf_Ehdr *hdr,
	227	const Elf_Shdr *sechdrs,
	228	struct module *me)
	229	{
	230	/* Cheetah's I-cache is fully coherent. */
	231	if (tlb_type == spitfire) {
	232	unsigned long va;
	233
	234	flushw_all();
	235	for (va = 0; va < (PAGE_SIZE << 1); va += 32)
	236	spitfire_put_icache_tag(va, 0x0);
	237	__asm__ __volatile__("flush %g6");
	238	}
	239
	240	return 0;
	241	}
e6b04fe0 SR	242	#else
	243	int module_finalize(const Elf_Ehdr *hdr,
	244	const Elf_Shdr *sechdrs,
	245	struct module *me)
	246	{
	247	return 0;
	248	}
627bf2f6	249	#endif /* CONFIG_SPARC64 */
1da177e4 LT	250
	251	void module_arch_cleanup(struct module *mod)
	252	{
	253	}