[deliverable/linux.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 <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)

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 VSYSCALL_BASE	(__fix_to_virt(FIX_VSYSCALL))
#define VSYSCALL_EHDR	((const struct elfhdr *) VSYSCALL_BASE)
#define VSYSCALL_ENTRY	((unsigned long) &__kernel_vsyscall)
extern void __kernel_vsyscall;

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