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

#ifndef _ASM_X86_ELF_H
#define _ASM_X86_ELF_H

/*
 * ELF register definitions..
 */
#include <linux/thread_info.h>

#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_COMMON(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;		\
	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_CORE_COPY_REGS(pr_reg, regs)	\
do {						\
	ELF_CORE_COPY_REGS_COMMON(pr_reg, regs);\
	pr_reg[10] = get_user_gs(regs);		\
} while (0);

#define ELF_CORE_COPY_KERNEL_REGS(pr_reg, regs)	\
do {						\
	ELF_CORE_COPY_REGS_COMMON(pr_reg, regs);\
	savesegment(gs, pr_reg[10]);		\
} 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 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)			\
	elf_common_init(&current->thread, _r, 0)

#define	COMPAT_ELF_PLAT_INIT(regs, load_addr)		\
	elf_common_init(&current->thread, regs, __USER_DS)

void start_thread_ia32(struct pt_regs *regs, u32 new_ip, u32 new_sp);
#define compat_start_thread start_thread_ia32

void set_personality_ia32(void);
#define COMPAT_SET_PERSONALITY(ex) set_personality_ia32()

#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 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) 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 STACK_RND_MASK (0x7ff)

#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 uses_interp);

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

/*
 * True on X86_32 or when emulating IA32 on X86_64
 */
static inline int mmap_is_ia32(void)
{
#ifdef CONFIG_X86_32
	return 1;
#endif
#ifdef CONFIG_IA32_EMULATION
	if (test_thread_flag(TIF_IA32))
		return 1;
#endif
	return 0;
}

/* The first two values are special, do not change. See align_addr() */
enum align_flags {
	ALIGN_VA_32	= BIT(0),
	ALIGN_VA_64	= BIT(1),
	ALIGN_VDSO	= BIT(2),
	ALIGN_TOPDOWN	= BIT(3),
};

struct va_alignment {
	int flags;
	unsigned long mask;
} ____cacheline_aligned;

extern struct va_alignment va_align;
extern unsigned long align_addr(unsigned long, struct file *, enum align_flags);
#endif /* _ASM_X86_ELF_H */
Commit	Line	Data
1965aae3 PA	1	#ifndef _ASM_X86_ELF_H
1965aae3 PA	2	#define _ASM_X86_ELF_H
2439a791 TG	3
	4	/*
	5	* ELF register definitions..
	6	*/
dfb09f9b	7	#include <linux/thread_info.h>
2439a791 TG	8
	9	#include <asm/ptrace.h>
	10	#include <asm/user.h>
	11	#include <asm/auxvec.h>
	12
	13	typedef unsigned long elf_greg_t;
	14
486386f6	15	#define ELF_NGREG (sizeof(struct user_regs_struct) / sizeof(elf_greg_t))
2439a791 TG	16	typedef elf_greg_t elf_gregset_t[ELF_NGREG];
	17
	18	typedef struct user_i387_struct elf_fpregset_t;
	19
	20	#ifdef __i386__
	21
	22	typedef struct user_fxsr_struct elf_fpxregset_t;
	23
	24	#define R_386_NONE 0
	25	#define R_386_32 1
	26	#define R_386_PC32 2
	27	#define R_386_GOT32 3
	28	#define R_386_PLT32 4
	29	#define R_386_COPY 5
	30	#define R_386_GLOB_DAT 6
	31	#define R_386_JMP_SLOT 7
	32	#define R_386_RELATIVE 8
	33	#define R_386_GOTOFF 9
	34	#define R_386_GOTPC 10
	35	#define R_386_NUM 11
	36
	37	/*
	38	* These are used to set parameters in the core dumps.
	39	*/
	40	#define ELF_CLASS ELFCLASS32
	41	#define ELF_DATA ELFDATA2LSB
	42	#define ELF_ARCH EM_386
	43
96a388de	44	#else
2439a791 TG	45
	46	/* x86-64 relocation types */
	47	#define R_X86_64_NONE 0 /* No reloc */
	48	#define R_X86_64_64 1 /* Direct 64 bit */
	49	#define R_X86_64_PC32 2 /* PC relative 32 bit signed */
	50	#define R_X86_64_GOT32 3 /* 32 bit GOT entry */
	51	#define R_X86_64_PLT32 4 /* 32 bit PLT address */
	52	#define R_X86_64_COPY 5 /* Copy symbol at runtime */
	53	#define R_X86_64_GLOB_DAT 6 /* Create GOT entry */
	54	#define R_X86_64_JUMP_SLOT 7 /* Create PLT entry */
	55	#define R_X86_64_RELATIVE 8 /* Adjust by program base */
	56	#define R_X86_64_GOTPCREL 9 /* 32 bit signed pc relative
	57	offset to GOT */
	58	#define R_X86_64_32 10 /* Direct 32 bit zero extended */
	59	#define R_X86_64_32S 11 /* Direct 32 bit sign extended */
	60	#define R_X86_64_16 12 /* Direct 16 bit zero extended */
	61	#define R_X86_64_PC16 13 /* 16 bit sign extended pc relative */
	62	#define R_X86_64_8 14 /* Direct 8 bit sign extended */
	63	#define R_X86_64_PC8 15 /* 8 bit sign extended pc relative */
	64
	65	#define R_X86_64_NUM 16
	66
	67	/*
	68	* These are used to set parameters in the core dumps.
	69	*/
	70	#define ELF_CLASS ELFCLASS64
	71	#define ELF_DATA ELFDATA2LSB
	72	#define ELF_ARCH EM_X86_64
	73
	74	#endif
	75
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	86	#include <asm/processor.h>
9f9d489a	87	#include <asm/system.h>
e40c0fe6 JP	88
e40c0fe6 JP	89	#ifdef CONFIG_X86_32
2439a791 TG	90	#include <asm/desc.h>
2439a791 TG	91
af65d648	92	#define elf_check_arch(x) elf_check_arch_ia32(x)
2439a791 TG	93
	94	/* SVR4/i386 ABI (pages 3-31, 3-32) says that when the program starts %edx
	95	contains a pointer to a function which might be registered using `atexit'.
	96	This provides a mean for the dynamic linker to call DT_FINI functions for
	97	shared libraries that have been loaded before the code runs.
	98
	99	A value of 0 tells we have no such handler.
	100
	101	We might as well make sure everything else is cleared too (except for %esp),
	102	just to make things more deterministic.
	103	*/
486386f6 JP	104	#define ELF_PLAT_INIT(_r, load_addr) \
	105	do { \
	106	_r->bx = 0; _r->cx = 0; _r->dx = 0; \
	107	_r->si = 0; _r->di = 0; _r->bp = 0; \
	108	_r->ax = 0; \
2439a791 TG	109	} while (0)
2439a791 TG	110
06495476 HS	111	/*
	112	* regs is struct pt_regs, pr_reg is elf_gregset_t (which is
	113	* now struct_user_regs, they are different)
	114	*/
	115
ccbeed3a	116	#define ELF_CORE_COPY_REGS_COMMON(pr_reg, regs) \
486386f6 JP	117	do { \
	118	pr_reg[0] = regs->bx; \
	119	pr_reg[1] = regs->cx; \
	120	pr_reg[2] = regs->dx; \
	121	pr_reg[3] = regs->si; \
	122	pr_reg[4] = regs->di; \
	123	pr_reg[5] = regs->bp; \
	124	pr_reg[6] = regs->ax; \
	125	pr_reg[7] = regs->ds & 0xffff; \
	126	pr_reg[8] = regs->es & 0xffff; \
	127	pr_reg[9] = regs->fs & 0xffff; \
486386f6 JP	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
ccbeed3a TH	136	#define ELF_CORE_COPY_REGS(pr_reg, regs) \
	137	do { \
	138	ELF_CORE_COPY_REGS_COMMON(pr_reg, regs);\
	139	pr_reg[10] = get_user_gs(regs); \
	140	} while (0);
	141
	142	#define ELF_CORE_COPY_KERNEL_REGS(pr_reg, regs) \
	143	do { \
	144	ELF_CORE_COPY_REGS_COMMON(pr_reg, regs);\
	145	savesegment(gs, pr_reg[10]); \
	146	} while (0);
	147
2439a791 TG	148	#define ELF_PLATFORM (utsname()->machine)
2439a791 TG	149	#define set_personality_64bit() do { } while (0)
2439a791 TG	150
	151	#else /* CONFIG_X86_32 */
	152
2439a791 TG	153	/*
	154	* This is used to ensure we don't load something for the wrong architecture.
	155	*/
486386f6	156	#define elf_check_arch(x) \
2439a791 TG	157	((x)->e_machine == EM_X86_64)
2439a791 TG	158
a97f52e6 RM	159	#define compat_elf_check_arch(x) elf_check_arch_ia32(x)
a97f52e6 RM	160
a97f52e6 RM	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	173	#define ELF_PLAT_INIT(_r, load_addr) \
11557b24	174	elf_common_init(&current->thread, _r, 0)
2439a791	175
486386f6	176	#define COMPAT_ELF_PLAT_INIT(regs, load_addr) \
a97f52e6	177	elf_common_init(&current->thread, regs, __USER_DS)
486386f6	178
a6f05a6a PA	179	void start_thread_ia32(struct pt_regs *regs, u32 new_ip, u32 new_sp);
a6f05a6a PA	180	#define compat_start_thread start_thread_ia32
486386f6	181
05d43ed8 PA	182	void set_personality_ia32(void);
05d43ed8 PA	183	#define COMPAT_SET_PERSONALITY(ex) set_personality_ia32()
486386f6	184
a97f52e6 RM	185	#define COMPAT_ELF_PLATFORM ("i686")
a97f52e6 RM	186
06495476 HS	187	/*
	188	* regs is struct pt_regs, pr_reg is elf_gregset_t (which is
	189	* now struct_user_regs, they are different). Assumes current is the process
	190	* getting dumped.
	191	*/
	192
486386f6 JP	193	#define ELF_CORE_COPY_REGS(pr_reg, regs) \
486386f6 JP	194	do { \
06495476 HS	195	unsigned v; \
	196	(pr_reg)[0] = (regs)->r15; \
	197	(pr_reg)[1] = (regs)->r14; \
	198	(pr_reg)[2] = (regs)->r13; \
	199	(pr_reg)[3] = (regs)->r12; \
	200	(pr_reg)[4] = (regs)->bp; \
	201	(pr_reg)[5] = (regs)->bx; \
	202	(pr_reg)[6] = (regs)->r11; \
	203	(pr_reg)[7] = (regs)->r10; \
	204	(pr_reg)[8] = (regs)->r9; \
	205	(pr_reg)[9] = (regs)->r8; \
	206	(pr_reg)[10] = (regs)->ax; \
	207	(pr_reg)[11] = (regs)->cx; \
	208	(pr_reg)[12] = (regs)->dx; \
	209	(pr_reg)[13] = (regs)->si; \
	210	(pr_reg)[14] = (regs)->di; \
	211	(pr_reg)[15] = (regs)->orig_ax; \
	212	(pr_reg)[16] = (regs)->ip; \
	213	(pr_reg)[17] = (regs)->cs; \
	214	(pr_reg)[18] = (regs)->flags; \
	215	(pr_reg)[19] = (regs)->sp; \
	216	(pr_reg)[20] = (regs)->ss; \
	217	(pr_reg)[21] = current->thread.fs; \
	218	(pr_reg)[22] = current->thread.gs; \
	219	asm("movl %%ds,%0" : "=r" (v)); (pr_reg)[23] = v; \
	220	asm("movl %%es,%0" : "=r" (v)); (pr_reg)[24] = v; \
	221	asm("movl %%fs,%0" : "=r" (v)); (pr_reg)[25] = v; \
	222	asm("movl %%gs,%0" : "=r" (v)); (pr_reg)[26] = v; \
	223	} while (0);
	224
2439a791 TG	225	/* I'm not sure if we can use '-' here */
	226	#define ELF_PLATFORM ("x86_64")
	227	extern void set_personality_64bit(void);
a97f52e6 RM	228	extern unsigned int sysctl_vsyscall32;
a97f52e6 RM	229	extern int force_personality32;
2439a791 TG	230
	231	#endif /* !CONFIG_X86_32 */
	232
975511be	233	#define CORE_DUMP_USE_REGSET
2439a791 TG	234	#define ELF_EXEC_PAGESIZE 4096
	235
	236	/* This is the location that an ET_DYN program is loaded if exec'ed. Typical
	237	use of this is to invoke "./ld.so someprog" to test out a new version of
	238	the loader. We need to make sure that it is out of the way of the program
	239	that it will "exec", and that there is sufficient room for the brk. */
	240
	241	#define ELF_ET_DYN_BASE (TASK_SIZE / 3 * 2)
	242
	243	/* This yields a mask that user programs can use to figure out what
	244	instruction set this CPU supports. This could be done in user space,
	245	but it's not easy, and we've already done it here. */
	246
	247	#define ELF_HWCAP (boot_cpu_data.x86_capability[0])
	248
	249	/* This yields a string that ld.so will use to load implementation
	250	specific libraries for optimization. This is more specific in
	251	intent than poking at uname or /proc/cpuinfo.
	252
	253	For the moment, we have only optimizations for the Intel generations,
	254	but that could change... */
	255
0b592682	256	#define SET_PERSONALITY(ex) set_personality_64bit()
2439a791 TG	257
	258	/*
	259	* An executable for which elf_read_implies_exec() returns TRUE will
	260	* have the READ_IMPLIES_EXEC personality flag set automatically.
	261	*/
	262	#define elf_read_implies_exec(ex, executable_stack) \
	263	(executable_stack != EXSTACK_DISABLE_X)
	264
	265	struct task_struct;
	266
486386f6 JP	267	#define ARCH_DLINFO_IA32(vdso_enabled) \
	268	do { \
	269	if (vdso_enabled) { \
a97f52e6 RM	270	NEW_AUX_ENT(AT_SYSINFO, VDSO_ENTRY); \
a97f52e6 RM	271	NEW_AUX_ENT(AT_SYSINFO_EHDR, VDSO_CURRENT_BASE); \
486386f6	272	} \
a97f52e6 RM	273	} while (0)
a97f52e6 RM	274
2439a791	275	#ifdef CONFIG_X86_32
2439a791	276
80938332 MH	277	#define STACK_RND_MASK (0x7ff)
80938332 MH	278
2439a791	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
486386f6 JP	292	#define ARCH_DLINFO \
	293	do { \
	294	if (vdso_enabled) \
	295	NEW_AUX_ENT(AT_SYSINFO_EHDR, \
	296	(unsigned long)current->mm->context.vdso); \
2439a791 TG	297	} while (0)
2439a791 TG	298
a97f52e6 RM	299	#define AT_SYSINFO 32
	300
	301	#define COMPAT_ARCH_DLINFO ARCH_DLINFO_IA32(sysctl_vsyscall32)
	302
	303	#define COMPAT_ELF_ET_DYN_BASE (TASK_UNMAPPED_BASE + 0x1000000)
	304
2439a791 TG	305	#endif /* !CONFIG_X86_32 */
2439a791 TG	306
af65d648 RM	307	#define VDSO_CURRENT_BASE ((unsigned long)current->mm->context.vdso)
af65d648 RM	308
486386f6 JP	309	#define VDSO_ENTRY \
486386f6 JP	310	((unsigned long)VDSO32_SYMBOL(VDSO_CURRENT_BASE, vsyscall))
af65d648	311
2439a791 TG	312	struct linux_binprm;
	313
	314	#define ARCH_HAS_SETUP_ADDITIONAL_PAGES 1
	315	extern int arch_setup_additional_pages(struct linux_binprm *bprm,
fc5243d9	316	int uses_interp);
2439a791	317
a97f52e6 RM	318	extern int syscall32_setup_pages(struct linux_binprm *, int exstack);
	319	#define compat_arch_setup_additional_pages syscall32_setup_pages
	320
c1d171a0 JK	321	extern unsigned long arch_randomize_brk(struct mm_struct *mm);
	322	#define arch_randomize_brk arch_randomize_brk
	323
dfb09f9b BP	324	/*
	325	* True on X86_32 or when emulating IA32 on X86_64
	326	*/
	327	static inline int mmap_is_ia32(void)
	328	{
	329	#ifdef CONFIG_X86_32
	330	return 1;
	331	#endif
	332	#ifdef CONFIG_IA32_EMULATION
	333	if (test_thread_flag(TIF_IA32))
	334	return 1;
	335	#endif
	336	return 0;
	337	}
	338
	339	/* The first two values are special, do not change. See align_addr() */
	340	enum align_flags {
	341	ALIGN_VA_32 = BIT(0),
	342	ALIGN_VA_64 = BIT(1),
	343	ALIGN_VDSO = BIT(2),
	344	ALIGN_TOPDOWN = BIT(3),
	345	};
	346
	347	struct va_alignment {
	348	int flags;
	349	unsigned long mask;
	350	} ____cacheline_aligned;
	351
	352	extern struct va_alignment va_align;
	353	extern unsigned long align_addr(unsigned long, struct file *, enum align_flags);
1965aae3	354	#endif /* _ASM_X86_ELF_H */