[deliverable/linux.git] / include / asm-x86 / elf.h

#ifndef _ASM_X86_ELF_H
#define _ASM_X86_ELF_H

/*
 * ELF register definitions..
 */

#include <asm/ptrace.h>
#include <asm/user.h>
#include <asm/auxvec.h>

typedef unsigned long elf_greg_t;

#define ELF_NGREG (sizeof (struct user_regs_struct) / sizeof(elf_greg_t))
typedef elf_greg_t elf_gregset_t[ELF_NGREG];

typedef struct user_i387_struct elf_fpregset_t;

#ifdef __i386__

typedef struct user_fxsr_struct elf_fpxregset_t;

#define R_386_NONE	0
#define R_386_32	1
#define R_386_PC32	2
#define R_386_GOT32	3
#define R_386_PLT32	4
#define R_386_COPY	5
#define R_386_GLOB_DAT	6
#define R_386_JMP_SLOT	7
#define R_386_RELATIVE	8
#define R_386_GOTOFF	9
#define R_386_GOTPC	10
#define R_386_NUM	11

/*
 * These are used to set parameters in the core dumps.
 */
#define ELF_CLASS	ELFCLASS32
#define ELF_DATA	ELFDATA2LSB
#define ELF_ARCH	EM_386

#else

/* x86-64 relocation types */
#define R_X86_64_NONE		0	/* No reloc */
#define R_X86_64_64		1	/* Direct 64 bit  */
#define R_X86_64_PC32		2	/* PC relative 32 bit signed */
#define R_X86_64_GOT32		3	/* 32 bit GOT entry */
#define R_X86_64_PLT32		4	/* 32 bit PLT address */
#define R_X86_64_COPY		5	/* Copy symbol at runtime */
#define R_X86_64_GLOB_DAT	6	/* Create GOT entry */
#define R_X86_64_JUMP_SLOT	7	/* Create PLT entry */
#define R_X86_64_RELATIVE	8	/* Adjust by program base */
#define R_X86_64_GOTPCREL	9	/* 32 bit signed pc relative
					   offset to GOT */
#define R_X86_64_32		10	/* Direct 32 bit zero extended */
#define R_X86_64_32S		11	/* Direct 32 bit sign extended */
#define R_X86_64_16		12	/* Direct 16 bit zero extended */
#define R_X86_64_PC16		13	/* 16 bit sign extended pc relative */
#define R_X86_64_8		14	/* Direct 8 bit sign extended  */
#define R_X86_64_PC8		15	/* 8 bit sign extended pc relative */

#define R_X86_64_NUM		16

/*
 * These are used to set parameters in the core dumps.
 */
#define ELF_CLASS	ELFCLASS64
#define ELF_DATA	ELFDATA2LSB
#define ELF_ARCH	EM_X86_64

#endif

#ifdef __KERNEL__
#include <asm/vdso.h>

extern unsigned int vdso_enabled;

/*
 * This is used to ensure we don't load something for the wrong architecture.
 */
#define elf_check_arch_ia32(x) \
	(((x)->e_machine == EM_386) || ((x)->e_machine == EM_486))

#ifdef CONFIG_X86_32
#include <asm/processor.h>
#include <asm/system.h>		/* for savesegment */
#include <asm/desc.h>

#define elf_check_arch(x)	elf_check_arch_ia32(x)

/* SVR4/i386 ABI (pages 3-31, 3-32) says that when the program starts %edx
   contains a pointer to a function which might be registered using `atexit'.
   This provides a mean for the dynamic linker to call DT_FINI functions for
   shared libraries that have been loaded before the code runs.

   A value of 0 tells we have no such handler.

   We might as well make sure everything else is cleared too (except for %esp),
   just to make things more deterministic.
 */
#define ELF_PLAT_INIT(_r, load_addr)	do { \
	_r->bx = 0; _r->cx = 0; _r->dx = 0; \
	_r->si = 0; _r->di = 0; _r->bp = 0; \
	_r->ax = 0; \
} while (0)

#define ELF_PLATFORM	(utsname()->machine)
#define set_personality_64bit()	do { } while (0)

#else /* CONFIG_X86_32 */

#include <asm/processor.h>

/*
 * This is used to ensure we don't load something for the wrong architecture.
 */
#define elf_check_arch(x) \
	((x)->e_machine == EM_X86_64)

#define compat_elf_check_arch(x)	elf_check_arch_ia32(x)

static inline void start_ia32_thread(struct pt_regs *regs, u32 ip, u32 sp)
{
	asm volatile("movl %0,%%fs" :: "r" (0));
	asm volatile("movl %0,%%es; movl %0,%%ds" : : "r" (__USER32_DS));
	load_gs_index(0);
	regs->ip = ip;
	regs->sp = sp;
	regs->flags = X86_EFLAGS_IF;
	regs->cs = __USER32_CS;
	regs->ss = __USER32_DS;
}

static inline void elf_common_init(struct thread_struct *t,
				   struct pt_regs *regs, const u16 ds)
{
	regs->ax = regs->bx = regs->cx = regs->dx = 0;
	regs->si = regs->di = regs->bp = 0;
	regs->r8 = regs->r9 = regs->r10 = regs->r11 = 0;
	regs->r12 = regs->r13 = regs->r14 = regs->r15 = 0;
	t->fs = t->gs = 0;
	t->fsindex = t->gsindex = 0;
	t->ds = t->es = ds;
}

#define ELF_PLAT_INIT(_r, load_addr)	do {		  \
	elf_common_init(&current->thread, _r, 0);	  \
	clear_thread_flag(TIF_IA32);			  \
} while (0)

#define	COMPAT_ELF_PLAT_INIT(regs, load_addr)	\
	elf_common_init(&current->thread, regs, __USER_DS)
#define	compat_start_thread(regs, ip, sp)	do {		\
		start_ia32_thread(regs, ip, sp);		\
		set_fs(USER_DS);				\
	} while (0)
#define COMPAT_SET_PERSONALITY(ex, ibcs2)	do {		\
		if (test_thread_flag(TIF_IA32))			\
			clear_thread_flag(TIF_ABI_PENDING);	\
		else						\
			set_thread_flag(TIF_ABI_PENDING);	\
		current->personality |= force_personality32;	\
	} while (0)
#define COMPAT_ELF_PLATFORM			("i686")

/* I'm not sure if we can use '-' here */
#define ELF_PLATFORM       ("x86_64")
extern void set_personality_64bit(void);
extern unsigned int sysctl_vsyscall32;
extern int force_personality32;

#endif /* !CONFIG_X86_32 */

#define CORE_DUMP_USE_REGSET
#define USE_ELF_CORE_DUMP
#define ELF_EXEC_PAGESIZE	4096

/* This is the location that an ET_DYN program is loaded if exec'ed.  Typical
   use of this is to invoke "./ld.so someprog" to test out a new version of
   the loader.  We need to make sure that it is out of the way of the program
   that it will "exec", and that there is sufficient room for the brk.  */

#define ELF_ET_DYN_BASE		(TASK_SIZE / 3 * 2)

/* This yields a mask that user programs can use to figure out what
   instruction set this CPU supports.  This could be done in user space,
   but it's not easy, and we've already done it here.  */

#define ELF_HWCAP		(boot_cpu_data.x86_capability[0])

/* This yields a string that ld.so will use to load implementation
   specific libraries for optimization.  This is more specific in
   intent than poking at uname or /proc/cpuinfo.

   For the moment, we have only optimizations for the Intel generations,
   but that could change... */

#define SET_PERSONALITY(ex, ibcs2) set_personality_64bit()

/*
 * An executable for which elf_read_implies_exec() returns TRUE will
 * have the READ_IMPLIES_EXEC personality flag set automatically.
 */
#define elf_read_implies_exec(ex, executable_stack)	\
	(executable_stack != EXSTACK_DISABLE_X)

struct task_struct;

#define	ARCH_DLINFO_IA32(vdso_enabled) \
do if (vdso_enabled) {							\
		NEW_AUX_ENT(AT_SYSINFO,	VDSO_ENTRY);			\
		NEW_AUX_ENT(AT_SYSINFO_EHDR, VDSO_CURRENT_BASE);	\
} while (0)

#ifdef CONFIG_X86_32

#define VDSO_HIGH_BASE		(__fix_to_virt(FIX_VDSO))

#define ARCH_DLINFO		ARCH_DLINFO_IA32(vdso_enabled)

/* update AT_VECTOR_SIZE_ARCH if the number of NEW_AUX_ENT entries changes */

#else /* CONFIG_X86_32 */

#define VDSO_HIGH_BASE		0xffffe000U /* CONFIG_COMPAT_VDSO address */

/* 1GB for 64bit, 8MB for 32bit */
#define STACK_RND_MASK (test_thread_flag(TIF_IA32) ? 0x7ff : 0x3fffff)

#define ARCH_DLINFO						\
do if (vdso_enabled) {						\
	NEW_AUX_ENT(AT_SYSINFO_EHDR,(unsigned long)current->mm->context.vdso);\
} while (0)

#define AT_SYSINFO		32

#define COMPAT_ARCH_DLINFO	ARCH_DLINFO_IA32(sysctl_vsyscall32)

#define COMPAT_ELF_ET_DYN_BASE	(TASK_UNMAPPED_BASE + 0x1000000)

#endif /* !CONFIG_X86_32 */

#define VDSO_CURRENT_BASE	((unsigned long)current->mm->context.vdso)

#define VDSO_ENTRY \
	((unsigned long) VDSO32_SYMBOL(VDSO_CURRENT_BASE, vsyscall))

struct linux_binprm;

#define ARCH_HAS_SETUP_ADDITIONAL_PAGES 1
extern int arch_setup_additional_pages(struct linux_binprm *bprm,
				       int executable_stack);

extern int syscall32_setup_pages(struct linux_binprm *, int exstack);
#define compat_arch_setup_additional_pages	syscall32_setup_pages

extern unsigned long arch_randomize_brk(struct mm_struct *mm);
#define arch_randomize_brk arch_randomize_brk

#endif /* __KERNEL__ */

#endif
Commit	Line	Data
2439a791 TG	1	#ifndef _ASM_X86_ELF_H
	2	#define _ASM_X86_ELF_H
	3
	4	/*
	5	* ELF register definitions..
	6	*/
	7
	8	#include <asm/ptrace.h>
	9	#include <asm/user.h>
	10	#include <asm/auxvec.h>
	11
	12	typedef unsigned long elf_greg_t;
	13
	14	#define ELF_NGREG (sizeof (struct user_regs_struct) / sizeof(elf_greg_t))
	15	typedef elf_greg_t elf_gregset_t[ELF_NGREG];
	16
	17	typedef struct user_i387_struct elf_fpregset_t;
	18
	19	#ifdef __i386__
	20
	21	typedef struct user_fxsr_struct elf_fpxregset_t;
	22
	23	#define R_386_NONE 0
	24	#define R_386_32 1
	25	#define R_386_PC32 2
	26	#define R_386_GOT32 3
	27	#define R_386_PLT32 4
	28	#define R_386_COPY 5
	29	#define R_386_GLOB_DAT 6
	30	#define R_386_JMP_SLOT 7
	31	#define R_386_RELATIVE 8
	32	#define R_386_GOTOFF 9
	33	#define R_386_GOTPC 10
	34	#define R_386_NUM 11
	35
	36	/*
	37	* These are used to set parameters in the core dumps.
	38	*/
	39	#define ELF_CLASS ELFCLASS32
	40	#define ELF_DATA ELFDATA2LSB
	41	#define ELF_ARCH EM_386
	42
96a388de	43	#else
2439a791 TG	44
	45	/* x86-64 relocation types */
	46	#define R_X86_64_NONE 0 /* No reloc */
	47	#define R_X86_64_64 1 /* Direct 64 bit */
	48	#define R_X86_64_PC32 2 /* PC relative 32 bit signed */
	49	#define R_X86_64_GOT32 3 /* 32 bit GOT entry */
	50	#define R_X86_64_PLT32 4 /* 32 bit PLT address */
	51	#define R_X86_64_COPY 5 /* Copy symbol at runtime */
	52	#define R_X86_64_GLOB_DAT 6 /* Create GOT entry */
	53	#define R_X86_64_JUMP_SLOT 7 /* Create PLT entry */
	54	#define R_X86_64_RELATIVE 8 /* Adjust by program base */
	55	#define R_X86_64_GOTPCREL 9 /* 32 bit signed pc relative
	56	offset to GOT */
	57	#define R_X86_64_32 10 /* Direct 32 bit zero extended */
	58	#define R_X86_64_32S 11 /* Direct 32 bit sign extended */
	59	#define R_X86_64_16 12 /* Direct 16 bit zero extended */
	60	#define R_X86_64_PC16 13 /* 16 bit sign extended pc relative */
	61	#define R_X86_64_8 14 /* Direct 8 bit sign extended */
	62	#define R_X86_64_PC8 15 /* 8 bit sign extended pc relative */
	63
	64	#define R_X86_64_NUM 16
	65
	66	/*
	67	* These are used to set parameters in the core dumps.
	68	*/
	69	#define ELF_CLASS ELFCLASS64
	70	#define ELF_DATA ELFDATA2LSB
	71	#define ELF_ARCH EM_X86_64
	72
	73	#endif
	74
	75	#ifdef __KERNEL__
a97f52e6 RM	76	#include <asm/vdso.h>
	77
	78	extern unsigned int vdso_enabled;
2439a791	79
af65d648 RM	80	/*
	81	* This is used to ensure we don't load something for the wrong architecture.
	82	*/
	83	#define elf_check_arch_ia32(x) \
	84	(((x)->e_machine == EM_386) \|\| ((x)->e_machine == EM_486))
	85
2439a791 TG	86	#ifdef CONFIG_X86_32
	87	#include <asm/processor.h>
	88	#include <asm/system.h> /* for savesegment */
	89	#include <asm/desc.h>
	90
af65d648	91	#define elf_check_arch(x) elf_check_arch_ia32(x)
2439a791 TG	92
	93	/* SVR4/i386 ABI (pages 3-31, 3-32) says that when the program starts %edx
	94	contains a pointer to a function which might be registered using `atexit'.
	95	This provides a mean for the dynamic linker to call DT_FINI functions for
	96	shared libraries that have been loaded before the code runs.
	97
	98	A value of 0 tells we have no such handler.
	99
	100	We might as well make sure everything else is cleared too (except for %esp),
	101	just to make things more deterministic.
	102	*/
	103	#define ELF_PLAT_INIT(_r, load_addr) do { \
65ea5b03 PA	104	_r->bx = 0; _r->cx = 0; _r->dx = 0; \
	105	_r->si = 0; _r->di = 0; _r->bp = 0; \
	106	_r->ax = 0; \
2439a791 TG	107	} while (0)
2439a791 TG	108
2439a791 TG	109	#define ELF_PLATFORM (utsname()->machine)
2439a791 TG	110	#define set_personality_64bit() do { } while (0)
2439a791 TG	111
	112	#else /* CONFIG_X86_32 */
	113
	114	#include <asm/processor.h>
	115
	116	/*
	117	* This is used to ensure we don't load something for the wrong architecture.
	118	*/
	119	#define elf_check_arch(x) \
	120	((x)->e_machine == EM_X86_64)
	121
a97f52e6 RM	122	#define compat_elf_check_arch(x) elf_check_arch_ia32(x)
	123
	124	static inline void start_ia32_thread(struct pt_regs *regs, u32 ip, u32 sp)
	125	{
	126	asm volatile("movl %0,%%fs" :: "r" (0));
	127	asm volatile("movl %0,%%es; movl %0,%%ds" : : "r" (__USER32_DS));
	128	load_gs_index(0);
	129	regs->ip = ip;
	130	regs->sp = sp;
	131	regs->flags = X86_EFLAGS_IF;
	132	regs->cs = __USER32_CS;
	133	regs->ss = __USER32_DS;
	134	}
	135
	136	static inline void elf_common_init(struct thread_struct *t,
	137	struct pt_regs *regs, const u16 ds)
	138	{
	139	regs->ax = regs->bx = regs->cx = regs->dx = 0;
	140	regs->si = regs->di = regs->bp = 0;
	141	regs->r8 = regs->r9 = regs->r10 = regs->r11 = 0;
	142	regs->r12 = regs->r13 = regs->r14 = regs->r15 = 0;
	143	t->fs = t->gs = 0;
	144	t->fsindex = t->gsindex = 0;
	145	t->ds = t->es = ds;
	146	}
	147
2439a791	148	#define ELF_PLAT_INIT(_r, load_addr) do { \
a97f52e6	149	elf_common_init(&current->thread, _r, 0); \
2439a791 TG	150	clear_thread_flag(TIF_IA32); \
	151	} while (0)
	152
a97f52e6 RM	153	#define COMPAT_ELF_PLAT_INIT(regs, load_addr) \
	154	elf_common_init(&current->thread, regs, __USER_DS)
	155	#define compat_start_thread(regs, ip, sp) do { \
	156	start_ia32_thread(regs, ip, sp); \
	157	set_fs(USER_DS); \
	158	} while (0)
	159	#define COMPAT_SET_PERSONALITY(ex, ibcs2) do { \
	160	if (test_thread_flag(TIF_IA32)) \
	161	clear_thread_flag(TIF_ABI_PENDING); \
	162	else \
	163	set_thread_flag(TIF_ABI_PENDING); \
	164	current->personality \|= force_personality32; \
	165	} while (0)
	166	#define COMPAT_ELF_PLATFORM ("i686")
	167
2439a791 TG	168	/* I'm not sure if we can use '-' here */
	169	#define ELF_PLATFORM ("x86_64")
	170	extern void set_personality_64bit(void);
a97f52e6 RM	171	extern unsigned int sysctl_vsyscall32;
a97f52e6 RM	172	extern int force_personality32;
2439a791 TG	173
	174	#endif /* !CONFIG_X86_32 */
	175
975511be	176	#define CORE_DUMP_USE_REGSET
2439a791 TG	177	#define USE_ELF_CORE_DUMP
	178	#define ELF_EXEC_PAGESIZE 4096
	179
	180	/* This is the location that an ET_DYN program is loaded if exec'ed. Typical
	181	use of this is to invoke "./ld.so someprog" to test out a new version of
	182	the loader. We need to make sure that it is out of the way of the program
	183	that it will "exec", and that there is sufficient room for the brk. */
	184
	185	#define ELF_ET_DYN_BASE (TASK_SIZE / 3 * 2)
	186
	187	/* This yields a mask that user programs can use to figure out what
	188	instruction set this CPU supports. This could be done in user space,
	189	but it's not easy, and we've already done it here. */
	190
	191	#define ELF_HWCAP (boot_cpu_data.x86_capability[0])
	192
	193	/* This yields a string that ld.so will use to load implementation
	194	specific libraries for optimization. This is more specific in
	195	intent than poking at uname or /proc/cpuinfo.
	196
	197	For the moment, we have only optimizations for the Intel generations,
	198	but that could change... */
	199
	200	#define SET_PERSONALITY(ex, ibcs2) set_personality_64bit()
	201
	202	/*
	203	* An executable for which elf_read_implies_exec() returns TRUE will
	204	* have the READ_IMPLIES_EXEC personality flag set automatically.
	205	*/
	206	#define elf_read_implies_exec(ex, executable_stack) \
	207	(executable_stack != EXSTACK_DISABLE_X)
	208
	209	struct task_struct;
	210
a97f52e6 RM	211	#define ARCH_DLINFO_IA32(vdso_enabled) \
	212	do if (vdso_enabled) { \
	213	NEW_AUX_ENT(AT_SYSINFO, VDSO_ENTRY); \
	214	NEW_AUX_ENT(AT_SYSINFO_EHDR, VDSO_CURRENT_BASE); \
	215	} while (0)
	216
2439a791	217	#ifdef CONFIG_X86_32
2439a791 TG	218
2439a791 TG	219	#define VDSO_HIGH_BASE (__fix_to_virt(FIX_VDSO))
2439a791	220
a97f52e6	221	#define ARCH_DLINFO ARCH_DLINFO_IA32(vdso_enabled)
2439a791	222
a97f52e6	223	/* update AT_VECTOR_SIZE_ARCH if the number of NEW_AUX_ENT entries changes */
2439a791 TG	224
	225	#else /* CONFIG_X86_32 */
	226
af65d648 RM	227	#define VDSO_HIGH_BASE 0xffffe000U /* CONFIG_COMPAT_VDSO address */
af65d648 RM	228
2439a791 TG	229	/* 1GB for 64bit, 8MB for 32bit */
	230	#define STACK_RND_MASK (test_thread_flag(TIF_IA32) ? 0x7ff : 0x3fffff)
	231
	232	#define ARCH_DLINFO \
	233	do if (vdso_enabled) { \
	234	NEW_AUX_ENT(AT_SYSINFO_EHDR,(unsigned long)current->mm->context.vdso);\
	235	} while (0)
	236
a97f52e6 RM	237	#define AT_SYSINFO 32
	238
	239	#define COMPAT_ARCH_DLINFO ARCH_DLINFO_IA32(sysctl_vsyscall32)
	240
	241	#define COMPAT_ELF_ET_DYN_BASE (TASK_UNMAPPED_BASE + 0x1000000)
	242
2439a791 TG	243	#endif /* !CONFIG_X86_32 */
2439a791 TG	244
af65d648 RM	245	#define VDSO_CURRENT_BASE ((unsigned long)current->mm->context.vdso)
	246
	247	#define VDSO_ENTRY \
	248	((unsigned long) VDSO32_SYMBOL(VDSO_CURRENT_BASE, vsyscall))
	249
2439a791 TG	250	struct linux_binprm;
	251
	252	#define ARCH_HAS_SETUP_ADDITIONAL_PAGES 1
	253	extern int arch_setup_additional_pages(struct linux_binprm *bprm,
	254	int executable_stack);
	255
a97f52e6 RM	256	extern int syscall32_setup_pages(struct linux_binprm *, int exstack);
	257	#define compat_arch_setup_additional_pages syscall32_setup_pages
	258
c1d171a0 JK	259	extern unsigned long arch_randomize_brk(struct mm_struct *mm);
	260	#define arch_randomize_brk arch_randomize_brk
	261
2439a791 TG	262	#endif /* __KERNEL__ */
2439a791 TG	263
96a388de	264	#endif