[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>

#ifdef CONFIG_X86_32
#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)

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