[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))

#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)

/*
 * 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 */

#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")

/*
 * 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 TG	85	#ifdef CONFIG_X86_32
	86	#include <asm/processor.h>
	87	#include <asm/system.h> /* for savesegment */
	88	#include <asm/desc.h>
	89
af65d648	90	#define elf_check_arch(x) elf_check_arch_ia32(x)
2439a791 TG	91
	92	/* SVR4/i386 ABI (pages 3-31, 3-32) says that when the program starts %edx
	93	contains a pointer to a function which might be registered using `atexit'.
	94	This provides a mean for the dynamic linker to call DT_FINI functions for
	95	shared libraries that have been loaded before the code runs.
	96
	97	A value of 0 tells we have no such handler.
	98
	99	We might as well make sure everything else is cleared too (except for %esp),
	100	just to make things more deterministic.
	101	*/
	102	#define ELF_PLAT_INIT(_r, load_addr) do { \
65ea5b03 PA	103	_r->bx = 0; _r->cx = 0; _r->dx = 0; \
	104	_r->si = 0; _r->di = 0; _r->bp = 0; \
	105	_r->ax = 0; \
2439a791 TG	106	} while (0)
2439a791 TG	107
06495476 HS	108	/*
	109	* regs is struct pt_regs, pr_reg is elf_gregset_t (which is
	110	* now struct_user_regs, they are different)
	111	*/
	112
	113	#define ELF_CORE_COPY_REGS(pr_reg, regs) do { \
	114	pr_reg[0] = regs->bx; \
	115	pr_reg[1] = regs->cx; \
	116	pr_reg[2] = regs->dx; \
	117	pr_reg[3] = regs->si; \
	118	pr_reg[4] = regs->di; \
	119	pr_reg[5] = regs->bp; \
	120	pr_reg[6] = regs->ax; \
	121	pr_reg[7] = regs->ds & 0xffff; \
	122	pr_reg[8] = regs->es & 0xffff; \
	123	pr_reg[9] = regs->fs & 0xffff; \
	124	savesegment(gs, pr_reg[10]); \
	125	pr_reg[11] = regs->orig_ax; \
	126	pr_reg[12] = regs->ip; \
	127	pr_reg[13] = regs->cs & 0xffff; \
	128	pr_reg[14] = regs->flags; \
	129	pr_reg[15] = regs->sp; \
	130	pr_reg[16] = regs->ss & 0xffff; \
	131	} while (0);
	132
2439a791 TG	133	#define ELF_PLATFORM (utsname()->machine)
2439a791 TG	134	#define set_personality_64bit() do { } while (0)
2439a791 TG	135
	136	#else /* CONFIG_X86_32 */
	137
	138	#include <asm/processor.h>
	139
	140	/*
	141	* This is used to ensure we don't load something for the wrong architecture.
	142	*/
	143	#define elf_check_arch(x) \
	144	((x)->e_machine == EM_X86_64)
	145
a97f52e6 RM	146	#define compat_elf_check_arch(x) elf_check_arch_ia32(x)
	147
	148	static inline void start_ia32_thread(struct pt_regs *regs, u32 ip, u32 sp)
	149	{
	150	asm volatile("movl %0,%%fs" :: "r" (0));
	151	asm volatile("movl %0,%%es; movl %0,%%ds" : : "r" (__USER32_DS));
	152	load_gs_index(0);
	153	regs->ip = ip;
	154	regs->sp = sp;
	155	regs->flags = X86_EFLAGS_IF;
	156	regs->cs = __USER32_CS;
	157	regs->ss = __USER32_DS;
	158	}
	159
	160	static inline void elf_common_init(struct thread_struct *t,
	161	struct pt_regs *regs, const u16 ds)
	162	{
	163	regs->ax = regs->bx = regs->cx = regs->dx = 0;
	164	regs->si = regs->di = regs->bp = 0;
	165	regs->r8 = regs->r9 = regs->r10 = regs->r11 = 0;
	166	regs->r12 = regs->r13 = regs->r14 = regs->r15 = 0;
	167	t->fs = t->gs = 0;
	168	t->fsindex = t->gsindex = 0;
	169	t->ds = t->es = ds;
	170	}
	171
2439a791	172	#define ELF_PLAT_INIT(_r, load_addr) do { \
a97f52e6	173	elf_common_init(&current->thread, _r, 0); \
2439a791 TG	174	clear_thread_flag(TIF_IA32); \
	175	} while (0)
	176
a97f52e6 RM	177	#define COMPAT_ELF_PLAT_INIT(regs, load_addr) \
	178	elf_common_init(&current->thread, regs, __USER_DS)
	179	#define compat_start_thread(regs, ip, sp) do { \
	180	start_ia32_thread(regs, ip, sp); \
	181	set_fs(USER_DS); \
	182	} while (0)
	183	#define COMPAT_SET_PERSONALITY(ex, ibcs2) do { \
	184	if (test_thread_flag(TIF_IA32)) \
	185	clear_thread_flag(TIF_ABI_PENDING); \
	186	else \
	187	set_thread_flag(TIF_ABI_PENDING); \
	188	current->personality \|= force_personality32; \
	189	} while (0)
	190	#define COMPAT_ELF_PLATFORM ("i686")
	191
06495476 HS	192	/*
	193	* regs is struct pt_regs, pr_reg is elf_gregset_t (which is
	194	* now struct_user_regs, they are different). Assumes current is the process
	195	* getting dumped.
	196	*/
	197
	198	#define ELF_CORE_COPY_REGS(pr_reg, regs) do { \
	199	unsigned v; \
	200	(pr_reg)[0] = (regs)->r15; \
	201	(pr_reg)[1] = (regs)->r14; \
	202	(pr_reg)[2] = (regs)->r13; \
	203	(pr_reg)[3] = (regs)->r12; \
	204	(pr_reg)[4] = (regs)->bp; \
	205	(pr_reg)[5] = (regs)->bx; \
	206	(pr_reg)[6] = (regs)->r11; \
	207	(pr_reg)[7] = (regs)->r10; \
	208	(pr_reg)[8] = (regs)->r9; \
	209	(pr_reg)[9] = (regs)->r8; \
	210	(pr_reg)[10] = (regs)->ax; \
	211	(pr_reg)[11] = (regs)->cx; \
	212	(pr_reg)[12] = (regs)->dx; \
	213	(pr_reg)[13] = (regs)->si; \
	214	(pr_reg)[14] = (regs)->di; \
	215	(pr_reg)[15] = (regs)->orig_ax; \
	216	(pr_reg)[16] = (regs)->ip; \
	217	(pr_reg)[17] = (regs)->cs; \
	218	(pr_reg)[18] = (regs)->flags; \
	219	(pr_reg)[19] = (regs)->sp; \
	220	(pr_reg)[20] = (regs)->ss; \
	221	(pr_reg)[21] = current->thread.fs; \
	222	(pr_reg)[22] = current->thread.gs; \
	223	asm("movl %%ds,%0" : "=r" (v)); (pr_reg)[23] = v; \
	224	asm("movl %%es,%0" : "=r" (v)); (pr_reg)[24] = v; \
	225	asm("movl %%fs,%0" : "=r" (v)); (pr_reg)[25] = v; \
	226	asm("movl %%gs,%0" : "=r" (v)); (pr_reg)[26] = v; \
	227	} while (0);
	228
2439a791 TG	229	/* I'm not sure if we can use '-' here */
	230	#define ELF_PLATFORM ("x86_64")
	231	extern void set_personality_64bit(void);
a97f52e6 RM	232	extern unsigned int sysctl_vsyscall32;
a97f52e6 RM	233	extern int force_personality32;
2439a791 TG	234
	235	#endif /* !CONFIG_X86_32 */
	236
975511be	237	#define CORE_DUMP_USE_REGSET
2439a791 TG	238	#define USE_ELF_CORE_DUMP
	239	#define ELF_EXEC_PAGESIZE 4096
	240
	241	/* This is the location that an ET_DYN program is loaded if exec'ed. Typical
	242	use of this is to invoke "./ld.so someprog" to test out a new version of
	243	the loader. We need to make sure that it is out of the way of the program
	244	that it will "exec", and that there is sufficient room for the brk. */
	245
	246	#define ELF_ET_DYN_BASE (TASK_SIZE / 3 * 2)
	247
	248	/* This yields a mask that user programs can use to figure out what
	249	instruction set this CPU supports. This could be done in user space,
	250	but it's not easy, and we've already done it here. */
	251
	252	#define ELF_HWCAP (boot_cpu_data.x86_capability[0])
	253
	254	/* This yields a string that ld.so will use to load implementation
	255	specific libraries for optimization. This is more specific in
	256	intent than poking at uname or /proc/cpuinfo.
	257
	258	For the moment, we have only optimizations for the Intel generations,
	259	but that could change... */
	260
	261	#define SET_PERSONALITY(ex, ibcs2) set_personality_64bit()
	262
	263	/*
	264	* An executable for which elf_read_implies_exec() returns TRUE will
	265	* have the READ_IMPLIES_EXEC personality flag set automatically.
	266	*/
	267	#define elf_read_implies_exec(ex, executable_stack) \
	268	(executable_stack != EXSTACK_DISABLE_X)
	269
	270	struct task_struct;
	271
a97f52e6 RM	272	#define ARCH_DLINFO_IA32(vdso_enabled) \
	273	do if (vdso_enabled) { \
	274	NEW_AUX_ENT(AT_SYSINFO, VDSO_ENTRY); \
	275	NEW_AUX_ENT(AT_SYSINFO_EHDR, VDSO_CURRENT_BASE); \
	276	} while (0)
	277
2439a791	278	#ifdef CONFIG_X86_32
2439a791 TG	279
2439a791 TG	280	#define VDSO_HIGH_BASE (__fix_to_virt(FIX_VDSO))
2439a791	281
a97f52e6	282	#define ARCH_DLINFO ARCH_DLINFO_IA32(vdso_enabled)
2439a791	283
a97f52e6	284	/* update AT_VECTOR_SIZE_ARCH if the number of NEW_AUX_ENT entries changes */
2439a791 TG	285
	286	#else /* CONFIG_X86_32 */
	287
af65d648 RM	288	#define VDSO_HIGH_BASE 0xffffe000U /* CONFIG_COMPAT_VDSO address */
af65d648 RM	289
2439a791 TG	290	/* 1GB for 64bit, 8MB for 32bit */
	291	#define STACK_RND_MASK (test_thread_flag(TIF_IA32) ? 0x7ff : 0x3fffff)
	292
	293	#define ARCH_DLINFO \
	294	do if (vdso_enabled) { \
	295	NEW_AUX_ENT(AT_SYSINFO_EHDR,(unsigned long)current->mm->context.vdso);\
	296	} while (0)
	297
a97f52e6 RM	298	#define AT_SYSINFO 32
	299
	300	#define COMPAT_ARCH_DLINFO ARCH_DLINFO_IA32(sysctl_vsyscall32)
	301
	302	#define COMPAT_ELF_ET_DYN_BASE (TASK_UNMAPPED_BASE + 0x1000000)
	303
2439a791 TG	304	#endif /* !CONFIG_X86_32 */
2439a791 TG	305
af65d648 RM	306	#define VDSO_CURRENT_BASE ((unsigned long)current->mm->context.vdso)
	307
	308	#define VDSO_ENTRY \
	309	((unsigned long) VDSO32_SYMBOL(VDSO_CURRENT_BASE, vsyscall))
	310
2439a791 TG	311	struct linux_binprm;
	312
	313	#define ARCH_HAS_SETUP_ADDITIONAL_PAGES 1
	314	extern int arch_setup_additional_pages(struct linux_binprm *bprm,
	315	int executable_stack);
	316
a97f52e6 RM	317	extern int syscall32_setup_pages(struct linux_binprm *, int exstack);
	318	#define compat_arch_setup_additional_pages syscall32_setup_pages
	319
c1d171a0 JK	320	extern unsigned long arch_randomize_brk(struct mm_struct *mm);
	321	#define arch_randomize_brk arch_randomize_brk
	322
96a388de	323	#endif