[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

#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))

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

#ifdef CONFIG_X86_32
#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)

/*
 * regs is struct pt_regs, pr_reg is elf_gregset_t (which is
 * now struct_user_regs, they are different)
 */

#define ELF_CORE_COPY_REGS(pr_reg, regs)	\
do {						\
	pr_reg[0] = regs->bx;			\
	pr_reg[1] = regs->cx;			\
	pr_reg[2] = regs->dx;			\
	pr_reg[3] = regs->si;			\
	pr_reg[4] = regs->di;			\
	pr_reg[5] = regs->bp;			\
	pr_reg[6] = regs->ax;			\
	pr_reg[7] = regs->ds & 0xffff;		\
	pr_reg[8] = regs->es & 0xffff;		\
	pr_reg[9] = regs->fs & 0xffff;		\
	savesegment(gs, pr_reg[10]);		\
	pr_reg[11] = regs->orig_ax;		\
	pr_reg[12] = regs->ip;			\
	pr_reg[13] = regs->cs & 0xffff;		\
	pr_reg[14] = regs->flags;		\
	pr_reg[15] = regs->sp;			\
	pr_reg[16] = regs->ss & 0xffff;		\
} while (0);

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

#else /* CONFIG_X86_32 */

/*
 * 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")

/*
 * regs is struct pt_regs, pr_reg is elf_gregset_t (which is
 * now struct_user_regs, they are different). Assumes current is the process
 * getting dumped.
 */

#define ELF_CORE_COPY_REGS(pr_reg, regs)			\
do {								\
	unsigned v;						\
	(pr_reg)[0] = (regs)->r15;				\
	(pr_reg)[1] = (regs)->r14;				\
	(pr_reg)[2] = (regs)->r13;				\
	(pr_reg)[3] = (regs)->r12;				\
	(pr_reg)[4] = (regs)->bp;				\
	(pr_reg)[5] = (regs)->bx;				\
	(pr_reg)[6] = (regs)->r11;				\
	(pr_reg)[7] = (regs)->r10;				\
	(pr_reg)[8] = (regs)->r9;				\
	(pr_reg)[9] = (regs)->r8;				\
	(pr_reg)[10] = (regs)->ax;				\
	(pr_reg)[11] = (regs)->cx;				\
	(pr_reg)[12] = (regs)->dx;				\
	(pr_reg)[13] = (regs)->si;				\
	(pr_reg)[14] = (regs)->di;				\
	(pr_reg)[15] = (regs)->orig_ax;				\
	(pr_reg)[16] = (regs)->ip;				\
	(pr_reg)[17] = (regs)->cs;				\
	(pr_reg)[18] = (regs)->flags;				\
	(pr_reg)[19] = (regs)->sp;				\
	(pr_reg)[20] = (regs)->ss;				\
	(pr_reg)[21] = current->thread.fs;			\
	(pr_reg)[22] = current->thread.gs;			\
	asm("movl %%ds,%0" : "=r" (v)); (pr_reg)[23] = v;	\
	asm("movl %%es,%0" : "=r" (v)); (pr_reg)[24] = v;	\
	asm("movl %%fs,%0" : "=r" (v)); (pr_reg)[25] = v;	\
	asm("movl %%gs,%0" : "=r" (v)); (pr_reg)[26] = v;	\
} while (0);

/* 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
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
486386f6	14	#define ELF_NGREG (sizeof(struct user_regs_struct) / sizeof(elf_greg_t))
2439a791 TG	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
a97f52e6 RM	75	#include <asm/vdso.h>
	76
	77	extern unsigned int vdso_enabled;
2439a791	78
af65d648 RM	79	/*
	80	* This is used to ensure we don't load something for the wrong architecture.
	81	*/
	82	#define elf_check_arch_ia32(x) \
	83	(((x)->e_machine == EM_386) \|\| ((x)->e_machine == EM_486))
	84
2439a791	85	#include <asm/processor.h>
9f9d489a	86	#include <asm/system.h>
e40c0fe6 JP	87
e40c0fe6 JP	88	#ifdef CONFIG_X86_32
2439a791 TG	89	#include <asm/desc.h>
2439a791 TG	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	*/
486386f6 JP	103	#define ELF_PLAT_INIT(_r, load_addr) \
	104	do { \
	105	_r->bx = 0; _r->cx = 0; _r->dx = 0; \
	106	_r->si = 0; _r->di = 0; _r->bp = 0; \
	107	_r->ax = 0; \
2439a791 TG	108	} while (0)
2439a791 TG	109
06495476 HS	110	/*
	111	* regs is struct pt_regs, pr_reg is elf_gregset_t (which is
	112	* now struct_user_regs, they are different)
	113	*/
	114
486386f6 JP	115	#define ELF_CORE_COPY_REGS(pr_reg, regs) \
	116	do { \
	117	pr_reg[0] = regs->bx; \
	118	pr_reg[1] = regs->cx; \
	119	pr_reg[2] = regs->dx; \
	120	pr_reg[3] = regs->si; \
	121	pr_reg[4] = regs->di; \
	122	pr_reg[5] = regs->bp; \
	123	pr_reg[6] = regs->ax; \
	124	pr_reg[7] = regs->ds & 0xffff; \
	125	pr_reg[8] = regs->es & 0xffff; \
	126	pr_reg[9] = regs->fs & 0xffff; \
	127	savesegment(gs, pr_reg[10]); \
	128	pr_reg[11] = regs->orig_ax; \
	129	pr_reg[12] = regs->ip; \
	130	pr_reg[13] = regs->cs & 0xffff; \
	131	pr_reg[14] = regs->flags; \
	132	pr_reg[15] = regs->sp; \
	133	pr_reg[16] = regs->ss & 0xffff; \
06495476 HS	134	} while (0);
06495476 HS	135
2439a791 TG	136	#define ELF_PLATFORM (utsname()->machine)
2439a791 TG	137	#define set_personality_64bit() do { } while (0)
2439a791 TG	138
	139	#else /* CONFIG_X86_32 */
	140
2439a791 TG	141	/*
	142	* This is used to ensure we don't load something for the wrong architecture.
	143	*/
486386f6	144	#define elf_check_arch(x) \
2439a791 TG	145	((x)->e_machine == EM_X86_64)
2439a791 TG	146
a97f52e6 RM	147	#define compat_elf_check_arch(x) elf_check_arch_ia32(x)
	148
	149	static inline void start_ia32_thread(struct pt_regs *regs, u32 ip, u32 sp)
	150	{
	151	asm volatile("movl %0,%%fs" :: "r" (0));
	152	asm volatile("movl %0,%%es; movl %0,%%ds" : : "r" (__USER32_DS));
	153	load_gs_index(0);
	154	regs->ip = ip;
	155	regs->sp = sp;
	156	regs->flags = X86_EFLAGS_IF;
	157	regs->cs = __USER32_CS;
	158	regs->ss = __USER32_DS;
	159	}
	160
	161	static inline void elf_common_init(struct thread_struct *t,
	162	struct pt_regs *regs, const u16 ds)
	163	{
	164	regs->ax = regs->bx = regs->cx = regs->dx = 0;
	165	regs->si = regs->di = regs->bp = 0;
	166	regs->r8 = regs->r9 = regs->r10 = regs->r11 = 0;
	167	regs->r12 = regs->r13 = regs->r14 = regs->r15 = 0;
	168	t->fs = t->gs = 0;
	169	t->fsindex = t->gsindex = 0;
	170	t->ds = t->es = ds;
	171	}
	172
486386f6 JP	173	#define ELF_PLAT_INIT(_r, load_addr) \
	174	do { \
	175	elf_common_init(&current->thread, _r, 0); \
	176	clear_thread_flag(TIF_IA32); \
2439a791 TG	177	} while (0)
2439a791 TG	178
486386f6	179	#define COMPAT_ELF_PLAT_INIT(regs, load_addr) \
a97f52e6	180	elf_common_init(&current->thread, regs, __USER_DS)
486386f6 JP	181
	182	#define compat_start_thread(regs, ip, sp) \
	183	do { \
	184	start_ia32_thread(regs, ip, sp); \
	185	set_fs(USER_DS); \
	186	} while (0)
	187
	188	#define COMPAT_SET_PERSONALITY(ex, ibcs2) \
	189	do { \
	190	if (test_thread_flag(TIF_IA32)) \
	191	clear_thread_flag(TIF_ABI_PENDING); \
	192	else \
	193	set_thread_flag(TIF_ABI_PENDING); \
	194	current->personality \|= force_personality32; \
	195	} while (0)
	196
a97f52e6 RM	197	#define COMPAT_ELF_PLATFORM ("i686")
a97f52e6 RM	198
06495476 HS	199	/*
	200	* regs is struct pt_regs, pr_reg is elf_gregset_t (which is
	201	* now struct_user_regs, they are different). Assumes current is the process
	202	* getting dumped.
	203	*/
	204
486386f6 JP	205	#define ELF_CORE_COPY_REGS(pr_reg, regs) \
486386f6 JP	206	do { \
06495476 HS	207	unsigned v; \
	208	(pr_reg)[0] = (regs)->r15; \
	209	(pr_reg)[1] = (regs)->r14; \
	210	(pr_reg)[2] = (regs)->r13; \
	211	(pr_reg)[3] = (regs)->r12; \
	212	(pr_reg)[4] = (regs)->bp; \
	213	(pr_reg)[5] = (regs)->bx; \
	214	(pr_reg)[6] = (regs)->r11; \
	215	(pr_reg)[7] = (regs)->r10; \
	216	(pr_reg)[8] = (regs)->r9; \
	217	(pr_reg)[9] = (regs)->r8; \
	218	(pr_reg)[10] = (regs)->ax; \
	219	(pr_reg)[11] = (regs)->cx; \
	220	(pr_reg)[12] = (regs)->dx; \
	221	(pr_reg)[13] = (regs)->si; \
	222	(pr_reg)[14] = (regs)->di; \
	223	(pr_reg)[15] = (regs)->orig_ax; \
	224	(pr_reg)[16] = (regs)->ip; \
	225	(pr_reg)[17] = (regs)->cs; \
	226	(pr_reg)[18] = (regs)->flags; \
	227	(pr_reg)[19] = (regs)->sp; \
	228	(pr_reg)[20] = (regs)->ss; \
	229	(pr_reg)[21] = current->thread.fs; \
	230	(pr_reg)[22] = current->thread.gs; \
	231	asm("movl %%ds,%0" : "=r" (v)); (pr_reg)[23] = v; \
	232	asm("movl %%es,%0" : "=r" (v)); (pr_reg)[24] = v; \
	233	asm("movl %%fs,%0" : "=r" (v)); (pr_reg)[25] = v; \
	234	asm("movl %%gs,%0" : "=r" (v)); (pr_reg)[26] = v; \
	235	} while (0);
	236
2439a791 TG	237	/* I'm not sure if we can use '-' here */
	238	#define ELF_PLATFORM ("x86_64")
	239	extern void set_personality_64bit(void);
a97f52e6 RM	240	extern unsigned int sysctl_vsyscall32;
a97f52e6 RM	241	extern int force_personality32;
2439a791 TG	242
	243	#endif /* !CONFIG_X86_32 */
	244
975511be	245	#define CORE_DUMP_USE_REGSET
2439a791 TG	246	#define USE_ELF_CORE_DUMP
	247	#define ELF_EXEC_PAGESIZE 4096
	248
	249	/* This is the location that an ET_DYN program is loaded if exec'ed. Typical
	250	use of this is to invoke "./ld.so someprog" to test out a new version of
	251	the loader. We need to make sure that it is out of the way of the program
	252	that it will "exec", and that there is sufficient room for the brk. */
	253
	254	#define ELF_ET_DYN_BASE (TASK_SIZE / 3 * 2)
	255
	256	/* This yields a mask that user programs can use to figure out what
	257	instruction set this CPU supports. This could be done in user space,
	258	but it's not easy, and we've already done it here. */
	259
	260	#define ELF_HWCAP (boot_cpu_data.x86_capability[0])
	261
	262	/* This yields a string that ld.so will use to load implementation
	263	specific libraries for optimization. This is more specific in
	264	intent than poking at uname or /proc/cpuinfo.
	265
	266	For the moment, we have only optimizations for the Intel generations,
	267	but that could change... */
	268
	269	#define SET_PERSONALITY(ex, ibcs2) set_personality_64bit()
	270
	271	/*
	272	* An executable for which elf_read_implies_exec() returns TRUE will
	273	* have the READ_IMPLIES_EXEC personality flag set automatically.
	274	*/
	275	#define elf_read_implies_exec(ex, executable_stack) \
	276	(executable_stack != EXSTACK_DISABLE_X)
	277
	278	struct task_struct;
	279
486386f6 JP	280	#define ARCH_DLINFO_IA32(vdso_enabled) \
	281	do { \
	282	if (vdso_enabled) { \
a97f52e6 RM	283	NEW_AUX_ENT(AT_SYSINFO, VDSO_ENTRY); \
a97f52e6 RM	284	NEW_AUX_ENT(AT_SYSINFO_EHDR, VDSO_CURRENT_BASE); \
486386f6	285	} \
a97f52e6 RM	286	} while (0)
a97f52e6 RM	287
2439a791	288	#ifdef CONFIG_X86_32
2439a791 TG	289
2439a791 TG	290	#define VDSO_HIGH_BASE (__fix_to_virt(FIX_VDSO))
2439a791	291
a97f52e6	292	#define ARCH_DLINFO ARCH_DLINFO_IA32(vdso_enabled)
2439a791	293
a97f52e6	294	/* update AT_VECTOR_SIZE_ARCH if the number of NEW_AUX_ENT entries changes */
2439a791 TG	295
	296	#else /* CONFIG_X86_32 */
	297
af65d648 RM	298	#define VDSO_HIGH_BASE 0xffffe000U /* CONFIG_COMPAT_VDSO address */
af65d648 RM	299
2439a791 TG	300	/* 1GB for 64bit, 8MB for 32bit */
	301	#define STACK_RND_MASK (test_thread_flag(TIF_IA32) ? 0x7ff : 0x3fffff)
	302
486386f6 JP	303	#define ARCH_DLINFO \
	304	do { \
	305	if (vdso_enabled) \
	306	NEW_AUX_ENT(AT_SYSINFO_EHDR, \
	307	(unsigned long)current->mm->context.vdso); \
2439a791 TG	308	} while (0)
2439a791 TG	309
a97f52e6 RM	310	#define AT_SYSINFO 32
	311
	312	#define COMPAT_ARCH_DLINFO ARCH_DLINFO_IA32(sysctl_vsyscall32)
	313
	314	#define COMPAT_ELF_ET_DYN_BASE (TASK_UNMAPPED_BASE + 0x1000000)
	315
2439a791 TG	316	#endif /* !CONFIG_X86_32 */
2439a791 TG	317
af65d648 RM	318	#define VDSO_CURRENT_BASE ((unsigned long)current->mm->context.vdso)
af65d648 RM	319
486386f6 JP	320	#define VDSO_ENTRY \
486386f6 JP	321	((unsigned long)VDSO32_SYMBOL(VDSO_CURRENT_BASE, vsyscall))
af65d648	322
2439a791 TG	323	struct linux_binprm;
	324
	325	#define ARCH_HAS_SETUP_ADDITIONAL_PAGES 1
	326	extern int arch_setup_additional_pages(struct linux_binprm *bprm,
	327	int executable_stack);
	328
a97f52e6 RM	329	extern int syscall32_setup_pages(struct linux_binprm *, int exstack);
	330	#define compat_arch_setup_additional_pages syscall32_setup_pages
	331
c1d171a0 JK	332	extern unsigned long arch_randomize_brk(struct mm_struct *mm);
	333	#define arch_randomize_brk arch_randomize_brk
	334
96a388de	335	#endif