[linux-2.6-block.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)
{
	loadsegment(fs, 0);
	loadsegment(ds, __USER32_DS);
	loadsegment(es, __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 /* ASM_X86__ELF_H */
Commit	Line	Data
77ef50a5 VN	1	#ifndef ASM_X86__ELF_H
77ef50a5 VN	2	#define ASM_X86__ELF_H
2439a791 TG	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	{
b6edbb1e JF	151	loadsegment(fs, 0);
	152	loadsegment(ds, __USER32_DS);
	153	loadsegment(es, __USER32_DS);
a97f52e6 RM	154	load_gs_index(0);
	155	regs->ip = ip;
	156	regs->sp = sp;
	157	regs->flags = X86_EFLAGS_IF;
	158	regs->cs = __USER32_CS;
	159	regs->ss = __USER32_DS;
	160	}
	161
	162	static inline void elf_common_init(struct thread_struct *t,
	163	struct pt_regs *regs, const u16 ds)
	164	{
	165	regs->ax = regs->bx = regs->cx = regs->dx = 0;
	166	regs->si = regs->di = regs->bp = 0;
	167	regs->r8 = regs->r9 = regs->r10 = regs->r11 = 0;
	168	regs->r12 = regs->r13 = regs->r14 = regs->r15 = 0;
	169	t->fs = t->gs = 0;
	170	t->fsindex = t->gsindex = 0;
	171	t->ds = t->es = ds;
	172	}
	173
486386f6 JP	174	#define ELF_PLAT_INIT(_r, load_addr) \
	175	do { \
	176	elf_common_init(&current->thread, _r, 0); \
	177	clear_thread_flag(TIF_IA32); \
2439a791 TG	178	} while (0)
2439a791 TG	179
486386f6	180	#define COMPAT_ELF_PLAT_INIT(regs, load_addr) \
a97f52e6	181	elf_common_init(&current->thread, regs, __USER_DS)
486386f6 JP	182
	183	#define compat_start_thread(regs, ip, sp) \
	184	do { \
	185	start_ia32_thread(regs, ip, sp); \
	186	set_fs(USER_DS); \
	187	} while (0)
	188
	189	#define COMPAT_SET_PERSONALITY(ex, ibcs2) \
	190	do { \
	191	if (test_thread_flag(TIF_IA32)) \
	192	clear_thread_flag(TIF_ABI_PENDING); \
	193	else \
	194	set_thread_flag(TIF_ABI_PENDING); \
	195	current->personality \|= force_personality32; \
	196	} while (0)
	197
a97f52e6 RM	198	#define COMPAT_ELF_PLATFORM ("i686")
a97f52e6 RM	199
06495476 HS	200	/*
	201	* regs is struct pt_regs, pr_reg is elf_gregset_t (which is
	202	* now struct_user_regs, they are different). Assumes current is the process
	203	* getting dumped.
	204	*/
	205
486386f6 JP	206	#define ELF_CORE_COPY_REGS(pr_reg, regs) \
486386f6 JP	207	do { \
06495476 HS	208	unsigned v; \
	209	(pr_reg)[0] = (regs)->r15; \
	210	(pr_reg)[1] = (regs)->r14; \
	211	(pr_reg)[2] = (regs)->r13; \
	212	(pr_reg)[3] = (regs)->r12; \
	213	(pr_reg)[4] = (regs)->bp; \
	214	(pr_reg)[5] = (regs)->bx; \
	215	(pr_reg)[6] = (regs)->r11; \
	216	(pr_reg)[7] = (regs)->r10; \
	217	(pr_reg)[8] = (regs)->r9; \
	218	(pr_reg)[9] = (regs)->r8; \
	219	(pr_reg)[10] = (regs)->ax; \
	220	(pr_reg)[11] = (regs)->cx; \
	221	(pr_reg)[12] = (regs)->dx; \
	222	(pr_reg)[13] = (regs)->si; \
	223	(pr_reg)[14] = (regs)->di; \
	224	(pr_reg)[15] = (regs)->orig_ax; \
	225	(pr_reg)[16] = (regs)->ip; \
	226	(pr_reg)[17] = (regs)->cs; \
	227	(pr_reg)[18] = (regs)->flags; \
	228	(pr_reg)[19] = (regs)->sp; \
	229	(pr_reg)[20] = (regs)->ss; \
	230	(pr_reg)[21] = current->thread.fs; \
	231	(pr_reg)[22] = current->thread.gs; \
	232	asm("movl %%ds,%0" : "=r" (v)); (pr_reg)[23] = v; \
	233	asm("movl %%es,%0" : "=r" (v)); (pr_reg)[24] = v; \
	234	asm("movl %%fs,%0" : "=r" (v)); (pr_reg)[25] = v; \
	235	asm("movl %%gs,%0" : "=r" (v)); (pr_reg)[26] = v; \
	236	} while (0);
	237
2439a791 TG	238	/* I'm not sure if we can use '-' here */
	239	#define ELF_PLATFORM ("x86_64")
	240	extern void set_personality_64bit(void);
a97f52e6 RM	241	extern unsigned int sysctl_vsyscall32;
a97f52e6 RM	242	extern int force_personality32;
2439a791 TG	243
	244	#endif /* !CONFIG_X86_32 */
	245
975511be	246	#define CORE_DUMP_USE_REGSET
2439a791 TG	247	#define USE_ELF_CORE_DUMP
	248	#define ELF_EXEC_PAGESIZE 4096
	249
	250	/* This is the location that an ET_DYN program is loaded if exec'ed. Typical
	251	use of this is to invoke "./ld.so someprog" to test out a new version of
	252	the loader. We need to make sure that it is out of the way of the program
	253	that it will "exec", and that there is sufficient room for the brk. */
	254
	255	#define ELF_ET_DYN_BASE (TASK_SIZE / 3 * 2)
	256
	257	/* This yields a mask that user programs can use to figure out what
	258	instruction set this CPU supports. This could be done in user space,
	259	but it's not easy, and we've already done it here. */
	260
	261	#define ELF_HWCAP (boot_cpu_data.x86_capability[0])
	262
	263	/* This yields a string that ld.so will use to load implementation
	264	specific libraries for optimization. This is more specific in
	265	intent than poking at uname or /proc/cpuinfo.
	266
	267	For the moment, we have only optimizations for the Intel generations,
	268	but that could change... */
	269
	270	#define SET_PERSONALITY(ex, ibcs2) set_personality_64bit()
	271
	272	/*
	273	* An executable for which elf_read_implies_exec() returns TRUE will
	274	* have the READ_IMPLIES_EXEC personality flag set automatically.
	275	*/
	276	#define elf_read_implies_exec(ex, executable_stack) \
	277	(executable_stack != EXSTACK_DISABLE_X)
	278
	279	struct task_struct;
	280
486386f6 JP	281	#define ARCH_DLINFO_IA32(vdso_enabled) \
	282	do { \
	283	if (vdso_enabled) { \
a97f52e6 RM	284	NEW_AUX_ENT(AT_SYSINFO, VDSO_ENTRY); \
a97f52e6 RM	285	NEW_AUX_ENT(AT_SYSINFO_EHDR, VDSO_CURRENT_BASE); \
486386f6	286	} \
a97f52e6 RM	287	} while (0)
a97f52e6 RM	288
2439a791	289	#ifdef CONFIG_X86_32
2439a791 TG	290
2439a791 TG	291	#define VDSO_HIGH_BASE (__fix_to_virt(FIX_VDSO))
2439a791	292
a97f52e6	293	#define ARCH_DLINFO ARCH_DLINFO_IA32(vdso_enabled)
2439a791	294
a97f52e6	295	/* update AT_VECTOR_SIZE_ARCH if the number of NEW_AUX_ENT entries changes */
2439a791 TG	296
	297	#else /* CONFIG_X86_32 */
	298
af65d648 RM	299	#define VDSO_HIGH_BASE 0xffffe000U /* CONFIG_COMPAT_VDSO address */
af65d648 RM	300
2439a791 TG	301	/* 1GB for 64bit, 8MB for 32bit */
	302	#define STACK_RND_MASK (test_thread_flag(TIF_IA32) ? 0x7ff : 0x3fffff)
	303
486386f6 JP	304	#define ARCH_DLINFO \
	305	do { \
	306	if (vdso_enabled) \
	307	NEW_AUX_ENT(AT_SYSINFO_EHDR, \
	308	(unsigned long)current->mm->context.vdso); \
2439a791 TG	309	} while (0)
2439a791 TG	310
a97f52e6 RM	311	#define AT_SYSINFO 32
	312
	313	#define COMPAT_ARCH_DLINFO ARCH_DLINFO_IA32(sysctl_vsyscall32)
	314
	315	#define COMPAT_ELF_ET_DYN_BASE (TASK_UNMAPPED_BASE + 0x1000000)
	316
2439a791 TG	317	#endif /* !CONFIG_X86_32 */
2439a791 TG	318
af65d648 RM	319	#define VDSO_CURRENT_BASE ((unsigned long)current->mm->context.vdso)
af65d648 RM	320
486386f6 JP	321	#define VDSO_ENTRY \
486386f6 JP	322	((unsigned long)VDSO32_SYMBOL(VDSO_CURRENT_BASE, vsyscall))
af65d648	323
2439a791 TG	324	struct linux_binprm;
	325
	326	#define ARCH_HAS_SETUP_ADDITIONAL_PAGES 1
	327	extern int arch_setup_additional_pages(struct linux_binprm *bprm,
	328	int executable_stack);
	329
a97f52e6 RM	330	extern int syscall32_setup_pages(struct linux_binprm *, int exstack);
	331	#define compat_arch_setup_additional_pages syscall32_setup_pages
	332
c1d171a0 JK	333	extern unsigned long arch_randomize_brk(struct mm_struct *mm);
	334	#define arch_randomize_brk arch_randomize_brk
	335
77ef50a5	336	#endif /* ASM_X86__ELF_H */