[GitHub/mt8127/android_kernel_alcatel_ttab.git] / include / asm-i386 / elf.h

#ifndef __ASMi386_ELF_H
#define __ASMi386_ELF_H

/*
 * ELF register definitions..
 */

#include <asm/ptrace.h>
#include <asm/user.h>
#include <asm/processor.h>
#include <asm/system.h>		/* for savesegment */
#include <asm/auxvec.h>
#include <asm/desc.h>

#include <linux/utsname.h>

#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

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;
typedef struct user_fxsr_struct elf_fpxregset_t;

/*
 * This is used to ensure we don't load something for the wrong architecture.
 */
#define elf_check_arch(x) \
	(((x)->e_machine == EM_386) || ((x)->e_machine == EM_486))

/*
 * These are used to set parameters in the core dumps.
 */
#define ELF_CLASS	ELFCLASS32
#define ELF_DATA	ELFDATA2LSB
#define ELF_ARCH	EM_386

/* 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->ebx = 0; _r->ecx = 0; _r->edx = 0; \
	_r->esi = 0; _r->edi = 0; _r->ebp = 0; \
	_r->eax = 0; \
} while (0)

#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)

/* 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)		\
	pr_reg[0] = regs->ebx;				\
	pr_reg[1] = regs->ecx;				\
	pr_reg[2] = regs->edx;				\
	pr_reg[3] = regs->esi;				\
	pr_reg[4] = regs->edi;				\
	pr_reg[5] = regs->ebp;				\
	pr_reg[6] = regs->eax;				\
	pr_reg[7] = regs->xds;				\
	pr_reg[8] = regs->xes;				\
	savesegment(fs,pr_reg[9]);			\
	savesegment(gs,pr_reg[10]);			\
	pr_reg[11] = regs->orig_eax;			\
	pr_reg[12] = regs->eip;				\
	pr_reg[13] = regs->xcs;				\
	pr_reg[14] = regs->eflags;			\
	pr_reg[15] = regs->esp;				\
	pr_reg[16] = regs->xss;

/* 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 ELF_PLATFORM  (system_utsname.machine)

#ifdef __KERNEL__
#define SET_PERSONALITY(ex, ibcs2) do { } while (0)

/*
 * 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;

extern int dump_task_regs (struct task_struct *, elf_gregset_t *);
extern int dump_task_fpu (struct task_struct *, elf_fpregset_t *);
extern int dump_task_extended_fpu (struct task_struct *, struct user_fxsr_struct *);

#define ELF_CORE_COPY_TASK_REGS(tsk, elf_regs) dump_task_regs(tsk, elf_regs)
#define ELF_CORE_COPY_FPREGS(tsk, elf_fpregs) dump_task_fpu(tsk, elf_fpregs)
#define ELF_CORE_COPY_XFPREGS(tsk, elf_xfpregs) dump_task_extended_fpu(tsk, elf_xfpregs)

#define VDSO_HIGH_BASE		(__fix_to_virt(FIX_VDSO))
#define VDSO_BASE		((unsigned long)current->mm->context.vdso)

#ifdef CONFIG_COMPAT_VDSO
# define VDSO_COMPAT_BASE	VDSO_HIGH_BASE
# define VDSO_PRELINK		VDSO_HIGH_BASE
#else
# define VDSO_COMPAT_BASE	VDSO_BASE
# define VDSO_PRELINK		0
#endif

#define VDSO_COMPAT_SYM(x) \
		(VDSO_COMPAT_BASE + (unsigned long)(x) - VDSO_PRELINK)

#define VDSO_SYM(x) \
		(VDSO_BASE + (unsigned long)(x) - VDSO_PRELINK)

#define VDSO_HIGH_EHDR		((const struct elfhdr *) VDSO_HIGH_BASE)
#define VDSO_EHDR		((const struct elfhdr *) VDSO_COMPAT_BASE)

extern void __kernel_vsyscall;

#define VDSO_ENTRY		VDSO_SYM(&__kernel_vsyscall)

#define ARCH_HAS_SETUP_ADDITIONAL_PAGES
struct linux_binprm;
extern int arch_setup_additional_pages(struct linux_binprm *bprm,
                                       int executable_stack);

extern unsigned int vdso_enabled;

#define ARCH_DLINFO						\
do if (vdso_enabled) {						\
		NEW_AUX_ENT(AT_SYSINFO,	VDSO_ENTRY);		\
		NEW_AUX_ENT(AT_SYSINFO_EHDR, VDSO_COMPAT_BASE);	\
} while (0)

/*
 * These macros parameterize elf_core_dump in fs/binfmt_elf.c to write out
 * extra segments containing the vsyscall DSO contents.  Dumping its
 * contents makes post-mortem fully interpretable later without matching up
 * the same kernel and hardware config to see what PC values meant.
 * Dumping its extra ELF program headers includes all the other information
 * a debugger needs to easily find how the vsyscall DSO was being used.
 */
#define ELF_CORE_EXTRA_PHDRS		(VDSO_HIGH_EHDR->e_phnum)
#define ELF_CORE_WRITE_EXTRA_PHDRS					      \
do {									      \
	const struct elf_phdr *const vsyscall_phdrs =			      \
		(const struct elf_phdr *) (VDSO_HIGH_BASE		      \
					   + VDSO_HIGH_EHDR->e_phoff);    \
	int i;								      \
	Elf32_Off ofs = 0;						      \
	for (i = 0; i < VDSO_HIGH_EHDR->e_phnum; ++i) {		      \
		struct elf_phdr phdr = vsyscall_phdrs[i];		      \
		if (phdr.p_type == PT_LOAD) {				      \
			BUG_ON(ofs != 0);				      \
			ofs = phdr.p_offset = offset;			      \
			phdr.p_memsz = PAGE_ALIGN(phdr.p_memsz);	      \
			phdr.p_filesz = phdr.p_memsz;			      \
			offset += phdr.p_filesz;			      \
		}							      \
		else							      \
			phdr.p_offset += ofs;				      \
		phdr.p_paddr = 0; /* match other core phdrs */		      \
		DUMP_WRITE(&phdr, sizeof(phdr));			      \
	}								      \
} while (0)
#define ELF_CORE_WRITE_EXTRA_DATA					      \
do {									      \
	const struct elf_phdr *const vsyscall_phdrs =			      \
		(const struct elf_phdr *) (VDSO_HIGH_BASE		      \
					   + VDSO_HIGH_EHDR->e_phoff);    \
	int i;								      \
	for (i = 0; i < VDSO_HIGH_EHDR->e_phnum; ++i) {		      \
		if (vsyscall_phdrs[i].p_type == PT_LOAD)		      \
			DUMP_WRITE((void *) vsyscall_phdrs[i].p_vaddr,	      \
				   PAGE_ALIGN(vsyscall_phdrs[i].p_memsz));    \
	}								      \
} while (0)

#endif

#endif
Commit	Line	Data
1da177e4 LT	1	#ifndef __ASMi386_ELF_H
	2	#define __ASMi386_ELF_H
	3
	4	/*
	5	* ELF register definitions..
	6	*/
	7
	8	#include <asm/ptrace.h>
	9	#include <asm/user.h>
	10	#include <asm/processor.h>
	11	#include <asm/system.h> /* for savesegment */
36d57ac4	12	#include <asm/auxvec.h>
e6e5494c	13	#include <asm/desc.h>
1da177e4 LT	14
	15	#include <linux/utsname.h>
	16
	17	#define R_386_NONE 0
	18	#define R_386_32 1
	19	#define R_386_PC32 2
	20	#define R_386_GOT32 3
	21	#define R_386_PLT32 4
	22	#define R_386_COPY 5
	23	#define R_386_GLOB_DAT 6
	24	#define R_386_JMP_SLOT 7
	25	#define R_386_RELATIVE 8
	26	#define R_386_GOTOFF 9
	27	#define R_386_GOTPC 10
	28	#define R_386_NUM 11
	29
	30	typedef unsigned long elf_greg_t;
	31
	32	#define ELF_NGREG (sizeof (struct user_regs_struct) / sizeof(elf_greg_t))
	33	typedef elf_greg_t elf_gregset_t[ELF_NGREG];
	34
	35	typedef struct user_i387_struct elf_fpregset_t;
	36	typedef struct user_fxsr_struct elf_fpxregset_t;
	37
	38	/*
	39	* This is used to ensure we don't load something for the wrong architecture.
	40	*/
	41	#define elf_check_arch(x) \
	42	(((x)->e_machine == EM_386) \|\| ((x)->e_machine == EM_486))
	43
	44	/*
	45	* These are used to set parameters in the core dumps.
	46	*/
	47	#define ELF_CLASS ELFCLASS32
	48	#define ELF_DATA ELFDATA2LSB
	49	#define ELF_ARCH EM_386
	50
	51	/* SVR4/i386 ABI (pages 3-31, 3-32) says that when the program starts %edx
	52	contains a pointer to a function which might be registered using `atexit'.
	53	This provides a mean for the dynamic linker to call DT_FINI functions for
	54	shared libraries that have been loaded before the code runs.
	55
	56	A value of 0 tells we have no such handler.
	57
	58	We might as well make sure everything else is cleared too (except for %esp),
	59	just to make things more deterministic.
	60	*/
	61	#define ELF_PLAT_INIT(_r, load_addr) do { \
	62	_r->ebx = 0; _r->ecx = 0; _r->edx = 0; \
	63	_r->esi = 0; _r->edi = 0; _r->ebp = 0; \
	64	_r->eax = 0; \
	65	} while (0)
	66
	67	#define USE_ELF_CORE_DUMP
	68	#define ELF_EXEC_PAGESIZE 4096
	69
	70	/* This is the location that an ET_DYN program is loaded if exec'ed. Typical
	71	use of this is to invoke "./ld.so someprog" to test out a new version of
	72	the loader. We need to make sure that it is out of the way of the program
	73	that it will "exec", and that there is sufficient room for the brk. */
	74
	75	#define ELF_ET_DYN_BASE (TASK_SIZE / 3 * 2)
	76
	77	/* regs is struct pt_regs, pr_reg is elf_gregset_t (which is
78	now struct_user_regs, they are different) */
79
80	#define ELF_CORE_COPY_REGS(pr_reg, regs) \
81	pr_reg[0] = regs->ebx; \
82	pr_reg[1] = regs->ecx; \
83	pr_reg[2] = regs->edx; \
84	pr_reg[3] = regs->esi; \
85	pr_reg[4] = regs->edi; \
86	pr_reg[5] = regs->ebp; \
87	pr_reg[6] = regs->eax; \
88	pr_reg[7] = regs->xds; \
89	pr_reg[8] = regs->xes; \
90	savesegment(fs,pr_reg[9]); \
91	savesegment(gs,pr_reg[10]); \
92	pr_reg[11] = regs->orig_eax; \
93	pr_reg[12] = regs->eip; \
94	pr_reg[13] = regs->xcs; \
95	pr_reg[14] = regs->eflags; \
96	pr_reg[15] = regs->esp; \
97	pr_reg[16] = regs->xss;
98
99	/* This yields a mask that user programs can use to figure out what
100	instruction set this CPU supports. This could be done in user space,
101	but it's not easy, and we've already done it here. */
102
103	#define ELF_HWCAP (boot_cpu_data.x86_capability[0])
104
105	/* This yields a string that ld.so will use to load implementation
106	specific libraries for optimization. This is more specific in
107	intent than poking at uname or /proc/cpuinfo.
108
109	For the moment, we have only optimizations for the Intel generations,
110	but that could change... */
111
112	#define ELF_PLATFORM (system_utsname.machine)
113
1da177e4 LT	114	#ifdef __KERNEL__
	115	#define SET_PERSONALITY(ex, ibcs2) do { } while (0)
	116
	117	/*
	118	* An executable for which elf_read_implies_exec() returns TRUE will
	119	* have the READ_IMPLIES_EXEC personality flag set automatically.
	120	*/
	121	#define elf_read_implies_exec(ex, executable_stack) (executable_stack != EXSTACK_DISABLE_X)
	122
8c65b4a6 TS	123	struct task_struct;
8c65b4a6 TS	124
1da177e4 LT	125	extern int dump_task_regs (struct task_struct , elf_gregset_t );
	126	extern int dump_task_fpu (struct task_struct , elf_fpregset_t );
	127	extern int dump_task_extended_fpu (struct task_struct , struct user_fxsr_struct );
	128
	129	#define ELF_CORE_COPY_TASK_REGS(tsk, elf_regs) dump_task_regs(tsk, elf_regs)
	130	#define ELF_CORE_COPY_FPREGS(tsk, elf_fpregs) dump_task_fpu(tsk, elf_fpregs)
	131	#define ELF_CORE_COPY_XFPREGS(tsk, elf_xfpregs) dump_task_extended_fpu(tsk, elf_xfpregs)
	132
e6e5494c IM	133	#define VDSO_HIGH_BASE (__fix_to_virt(FIX_VDSO))
	134	#define VDSO_BASE ((unsigned long)current->mm->context.vdso)
	135
	136	#ifdef CONFIG_COMPAT_VDSO
	137	# define VDSO_COMPAT_BASE VDSO_HIGH_BASE
	138	# define VDSO_PRELINK VDSO_HIGH_BASE
	139	#else
	140	# define VDSO_COMPAT_BASE VDSO_BASE
	141	# define VDSO_PRELINK 0
	142	#endif
	143
	144	#define VDSO_COMPAT_SYM(x) \
	145	(VDSO_COMPAT_BASE + (unsigned long)(x) - VDSO_PRELINK)
	146
	147	#define VDSO_SYM(x) \
	148	(VDSO_BASE + (unsigned long)(x) - VDSO_PRELINK)
	149
	150	#define VDSO_HIGH_EHDR ((const struct elfhdr *) VDSO_HIGH_BASE)
	151	#define VDSO_EHDR ((const struct elfhdr *) VDSO_COMPAT_BASE)
	152
1da177e4 LT	153	extern void __kernel_vsyscall;
1da177e4 LT	154
e6e5494c IM	155	#define VDSO_ENTRY VDSO_SYM(&__kernel_vsyscall)
	156
	157	#define ARCH_HAS_SETUP_ADDITIONAL_PAGES
	158	struct linux_binprm;
	159	extern int arch_setup_additional_pages(struct linux_binprm *bprm,
	160	int executable_stack);
	161
	162	extern unsigned int vdso_enabled;
	163
1da177e4	164	#define ARCH_DLINFO \
e6e5494c IM	165	do if (vdso_enabled) { \
	166	NEW_AUX_ENT(AT_SYSINFO, VDSO_ENTRY); \
	167	NEW_AUX_ENT(AT_SYSINFO_EHDR, VDSO_COMPAT_BASE); \
1da177e4 LT	168	} while (0)
	169
	170	/*
	171	* These macros parameterize elf_core_dump in fs/binfmt_elf.c to write out
	172	* extra segments containing the vsyscall DSO contents. Dumping its
	173	* contents makes post-mortem fully interpretable later without matching up
	174	* the same kernel and hardware config to see what PC values meant.
	175	* Dumping its extra ELF program headers includes all the other information
	176	* a debugger needs to easily find how the vsyscall DSO was being used.
	177	*/
e6e5494c	178	#define ELF_CORE_EXTRA_PHDRS (VDSO_HIGH_EHDR->e_phnum)
1da177e4 LT	179	#define ELF_CORE_WRITE_EXTRA_PHDRS \
	180	do { \
	181	const struct elf_phdr *const vsyscall_phdrs = \
e6e5494c IM	182	(const struct elf_phdr *) (VDSO_HIGH_BASE \
e6e5494c IM	183	+ VDSO_HIGH_EHDR->e_phoff); \
1da177e4 LT	184	int i; \
1da177e4 LT	185	Elf32_Off ofs = 0; \
e6e5494c	186	for (i = 0; i < VDSO_HIGH_EHDR->e_phnum; ++i) { \
1da177e4 LT	187	struct elf_phdr phdr = vsyscall_phdrs[i]; \
	188	if (phdr.p_type == PT_LOAD) { \
	189	BUG_ON(ofs != 0); \
	190	ofs = phdr.p_offset = offset; \
	191	phdr.p_memsz = PAGE_ALIGN(phdr.p_memsz); \
	192	phdr.p_filesz = phdr.p_memsz; \
	193	offset += phdr.p_filesz; \
	194	} \
	195	else \
	196	phdr.p_offset += ofs; \
	197	phdr.p_paddr = 0; /* match other core phdrs */ \
	198	DUMP_WRITE(&phdr, sizeof(phdr)); \
	199	} \
	200	} while (0)
	201	#define ELF_CORE_WRITE_EXTRA_DATA \
	202	do { \
	203	const struct elf_phdr *const vsyscall_phdrs = \
e6e5494c IM	204	(const struct elf_phdr *) (VDSO_HIGH_BASE \
e6e5494c IM	205	+ VDSO_HIGH_EHDR->e_phoff); \
1da177e4	206	int i; \
e6e5494c	207	for (i = 0; i < VDSO_HIGH_EHDR->e_phnum; ++i) { \
1da177e4 LT	208	if (vsyscall_phdrs[i].p_type == PT_LOAD) \
	209	DUMP_WRITE((void *) vsyscall_phdrs[i].p_vaddr, \
	210	PAGE_ALIGN(vsyscall_phdrs[i].p_memsz)); \
	211	} \
	212	} while (0)
	213
	214	#endif
	215
	216	#endif