arch/arm64/include/asm/elf.h - linux - Git at Google

 /*
  * Copyright (C) 2012 ARM Ltd.
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 as
  * published by the Free Software Foundation.
  *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 #ifndef __ASM_ELF_H
 #define __ASM_ELF_H

 #include <asm/hwcap.h>

 /*
  * ELF register definitions..
  */
 #include <asm/ptrace.h>
 #include <asm/user.h>

 /*
  * AArch64 static relocation types.
  */

 /* Miscellaneous. */
 #define R_ARM_NONE			0
 #define R_AARCH64_NONE			256

 /* Data. */
 #define R_AARCH64_ABS64			257
 #define R_AARCH64_ABS32			258
 #define R_AARCH64_ABS16			259
 #define R_AARCH64_PREL64		260
 #define R_AARCH64_PREL32		261
 #define R_AARCH64_PREL16		262

 /* Instructions. */
 #define R_AARCH64_MOVW_UABS_G0		263
 #define R_AARCH64_MOVW_UABS_G0_NC	264
 #define R_AARCH64_MOVW_UABS_G1		265
 #define R_AARCH64_MOVW_UABS_G1_NC	266
 #define R_AARCH64_MOVW_UABS_G2		267
 #define R_AARCH64_MOVW_UABS_G2_NC	268
 #define R_AARCH64_MOVW_UABS_G3		269

 #define R_AARCH64_MOVW_SABS_G0		270
 #define R_AARCH64_MOVW_SABS_G1		271
 #define R_AARCH64_MOVW_SABS_G2		272

 #define R_AARCH64_LD_PREL_LO19		273
 #define R_AARCH64_ADR_PREL_LO21		274
 #define R_AARCH64_ADR_PREL_PG_HI21	275
 #define R_AARCH64_ADR_PREL_PG_HI21_NC	276
 #define R_AARCH64_ADD_ABS_LO12_NC	277
 #define R_AARCH64_LDST8_ABS_LO12_NC	278

 #define R_AARCH64_TSTBR14		279
 #define R_AARCH64_CONDBR19		280
 #define R_AARCH64_JUMP26		282
 #define R_AARCH64_CALL26		283
 #define R_AARCH64_LDST16_ABS_LO12_NC	284
 #define R_AARCH64_LDST32_ABS_LO12_NC	285
 #define R_AARCH64_LDST64_ABS_LO12_NC	286
 #define R_AARCH64_LDST128_ABS_LO12_NC	299

 #define R_AARCH64_MOVW_PREL_G0		287
 #define R_AARCH64_MOVW_PREL_G0_NC	288
 #define R_AARCH64_MOVW_PREL_G1		289
 #define R_AARCH64_MOVW_PREL_G1_NC	290
 #define R_AARCH64_MOVW_PREL_G2		291
 #define R_AARCH64_MOVW_PREL_G2_NC	292
 #define R_AARCH64_MOVW_PREL_G3		293

 #define R_AARCH64_RELATIVE		1027

 /*
  * These are used to set parameters in the core dumps.
  */
 #define ELF_CLASS	ELFCLASS64
 #ifdef __AARCH64EB__
 #define ELF_DATA	ELFDATA2MSB
 #else
 #define ELF_DATA	ELFDATA2LSB
 #endif
 #define ELF_ARCH	EM_AARCH64

 /*
  * 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.
  */
 #define ELF_PLATFORM_SIZE	16
 #ifdef __AARCH64EB__
 #define ELF_PLATFORM		("aarch64_be")
 #else
 #define ELF_PLATFORM		("aarch64")
 #endif

 /*
  * This is used to ensure we don't load something for the wrong architecture.
  */
 #define elf_check_arch(x)		((x)->e_machine == EM_AARCH64)

 #define elf_read_implies_exec(ex,stk)	(stk != EXSTACK_DISABLE_X)

 #define CORE_DUMP_USE_REGSET
 #define ELF_EXEC_PAGESIZE	PAGE_SIZE

 /*
  * This is the base location for PIE (ET_DYN with INTERP) loads. On
  * 64-bit, this is above 4GB to leave the entire 32-bit address
  * space open for things that want to use the area for 32-bit pointers.
  */
 #define ELF_ET_DYN_BASE		(2 * TASK_SIZE_64 / 3)

 #ifndef __ASSEMBLY__

 #include <linux/bug.h>
 #include <asm/processor.h> /* for signal_minsigstksz, used by ARCH_DLINFO */

 typedef unsigned long elf_greg_t;

 #define ELF_NGREG (sizeof(struct user_pt_regs) / sizeof(elf_greg_t))
 #define ELF_CORE_COPY_REGS(dest, regs)	\
 	*(struct user_pt_regs *)&(dest) = (regs)->user_regs;

 typedef elf_greg_t elf_gregset_t[ELF_NGREG];
 typedef struct user_fpsimd_state elf_fpregset_t;

 /*
  * When the program starts, a1 contains a pointer to a function to be
  * registered with atexit, as per the SVR4 ABI.  A value of 0 means we have no
  * such handler.
  */
 #define ELF_PLAT_INIT(_r, load_addr)	(_r)->regs[0] = 0

 #define SET_PERSONALITY(ex)						\
 ({									\
 	clear_thread_flag(TIF_32BIT);					\
 	current->personality &= ~READ_IMPLIES_EXEC;			\
 })

 /* update AT_VECTOR_SIZE_ARCH if the number of NEW_AUX_ENT entries changes */
 #define ARCH_DLINFO							\
 do {									\
 	NEW_AUX_ENT(AT_SYSINFO_EHDR,					\
 		    (elf_addr_t)current->mm->context.vdso);		\
 									\
 	/*								\
 	 * Should always be nonzero unless there's a kernel bug.	\
 	 * If we haven't determined a sensible value to give to		\
 	 * userspace, omit the entry:					\
 	 */								\
 	if (likely(signal_minsigstksz))					\
 		NEW_AUX_ENT(AT_MINSIGSTKSZ, signal_minsigstksz);	\
 	else								\
 		NEW_AUX_ENT(AT_IGNORE, 0);				\
 } while (0)

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

 /* 1GB of VA */
 #ifdef CONFIG_COMPAT
 #define STACK_RND_MASK			(test_thread_flag(TIF_32BIT) ? \
 						0x7ff >> (PAGE_SHIFT - 12) : \
 						0x3ffff >> (PAGE_SHIFT - 12))
 #else
 #define STACK_RND_MASK			(0x3ffff >> (PAGE_SHIFT - 12))
 #endif

 #ifdef __AARCH64EB__
 #define COMPAT_ELF_PLATFORM		("v8b")
 #else
 #define COMPAT_ELF_PLATFORM		("v8l")
 #endif

 #ifdef CONFIG_COMPAT

 /* PIE load location for compat arm. Must match ARM ELF_ET_DYN_BASE. */
 #define COMPAT_ELF_ET_DYN_BASE		0x000400000UL

 /* AArch32 registers. */
 #define COMPAT_ELF_NGREG		18
 typedef unsigned int			compat_elf_greg_t;
 typedef compat_elf_greg_t		compat_elf_gregset_t[COMPAT_ELF_NGREG];

 /* AArch32 EABI. */
 #define EF_ARM_EABI_MASK		0xff000000
 #define compat_elf_check_arch(x)	(system_supports_32bit_el0() && \
 					 ((x)->e_machine == EM_ARM) && \
 					 ((x)->e_flags & EF_ARM_EABI_MASK))

 #define compat_start_thread		compat_start_thread
 /*
  * Unlike the native SET_PERSONALITY macro, the compat version maintains
  * READ_IMPLIES_EXEC across an execve() since this is the behaviour on
  * arch/arm/.
  */
 #define COMPAT_SET_PERSONALITY(ex)					\
 ({									\
 	set_thread_flag(TIF_32BIT);					\
  })
 #define COMPAT_ARCH_DLINFO
 extern int aarch32_setup_vectors_page(struct linux_binprm *bprm,
 				      int uses_interp);
 #define compat_arch_setup_additional_pages \
 					aarch32_setup_vectors_page

 #endif /* CONFIG_COMPAT */

 #endif /* !__ASSEMBLY__ */

 #endif
	/*
	* Copyright (C) 2012 ARM Ltd.
	*
	* This program is free software; you can redistribute it and/or modify
	* it under the terms of the GNU General Public License version 2 as
	* published by the Free Software Foundation.
	*
	* This program is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	* GNU General Public License for more details.
	*
	* You should have received a copy of the GNU General Public License
	* along with this program. If not, see <http://www.gnu.org/licenses/>.
	*/
	#ifndef __ASM_ELF_H
	#define __ASM_ELF_H

	#include <asm/hwcap.h>

	/*
	* ELF register definitions..
	*/
	#include <asm/ptrace.h>
	#include <asm/user.h>

	/*
	* AArch64 static relocation types.
	*/

	/* Miscellaneous. */
	#define R_ARM_NONE 0
	#define R_AARCH64_NONE 256

	/* Data. */
	#define R_AARCH64_ABS64 257
	#define R_AARCH64_ABS32 258
	#define R_AARCH64_ABS16 259
	#define R_AARCH64_PREL64 260
	#define R_AARCH64_PREL32 261
	#define R_AARCH64_PREL16 262

	/* Instructions. */
	#define R_AARCH64_MOVW_UABS_G0 263
	#define R_AARCH64_MOVW_UABS_G0_NC 264
	#define R_AARCH64_MOVW_UABS_G1 265
	#define R_AARCH64_MOVW_UABS_G1_NC 266
	#define R_AARCH64_MOVW_UABS_G2 267
	#define R_AARCH64_MOVW_UABS_G2_NC 268
	#define R_AARCH64_MOVW_UABS_G3 269

	#define R_AARCH64_MOVW_SABS_G0 270
	#define R_AARCH64_MOVW_SABS_G1 271
	#define R_AARCH64_MOVW_SABS_G2 272

	#define R_AARCH64_LD_PREL_LO19 273
	#define R_AARCH64_ADR_PREL_LO21 274
	#define R_AARCH64_ADR_PREL_PG_HI21 275
	#define R_AARCH64_ADR_PREL_PG_HI21_NC 276
	#define R_AARCH64_ADD_ABS_LO12_NC 277
	#define R_AARCH64_LDST8_ABS_LO12_NC 278

	#define R_AARCH64_TSTBR14 279
	#define R_AARCH64_CONDBR19 280
	#define R_AARCH64_JUMP26 282
	#define R_AARCH64_CALL26 283
	#define R_AARCH64_LDST16_ABS_LO12_NC 284
	#define R_AARCH64_LDST32_ABS_LO12_NC 285
	#define R_AARCH64_LDST64_ABS_LO12_NC 286
	#define R_AARCH64_LDST128_ABS_LO12_NC 299

	#define R_AARCH64_MOVW_PREL_G0 287
	#define R_AARCH64_MOVW_PREL_G0_NC 288
	#define R_AARCH64_MOVW_PREL_G1 289
	#define R_AARCH64_MOVW_PREL_G1_NC 290
	#define R_AARCH64_MOVW_PREL_G2 291
	#define R_AARCH64_MOVW_PREL_G2_NC 292
	#define R_AARCH64_MOVW_PREL_G3 293

	#define R_AARCH64_RELATIVE 1027

	/*
	* These are used to set parameters in the core dumps.
	*/
	#define ELF_CLASS ELFCLASS64
	#ifdef __AARCH64EB__
	#define ELF_DATA ELFDATA2MSB
	#else
	#define ELF_DATA ELFDATA2LSB
	#endif
	#define ELF_ARCH EM_AARCH64

	/*
	* 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.
	*/
	#define ELF_PLATFORM_SIZE 16
	#ifdef __AARCH64EB__
	#define ELF_PLATFORM ("aarch64_be")
	#else
	#define ELF_PLATFORM ("aarch64")
	#endif

	/*
	* This is used to ensure we don't load something for the wrong architecture.
	*/
	#define elf_check_arch(x) ((x)->e_machine == EM_AARCH64)

	#define elf_read_implies_exec(ex,stk) (stk != EXSTACK_DISABLE_X)

	#define CORE_DUMP_USE_REGSET
	#define ELF_EXEC_PAGESIZE PAGE_SIZE

	/*
	* This is the base location for PIE (ET_DYN with INTERP) loads. On
	* 64-bit, this is above 4GB to leave the entire 32-bit address
	* space open for things that want to use the area for 32-bit pointers.
	*/
	#define ELF_ET_DYN_BASE (2 * TASK_SIZE_64 / 3)

	#ifndef __ASSEMBLY__

	#include <linux/bug.h>
	#include <asm/processor.h> /* for signal_minsigstksz, used by ARCH_DLINFO */

	typedef unsigned long elf_greg_t;

	#define ELF_NGREG (sizeof(struct user_pt_regs) / sizeof(elf_greg_t))
	#define ELF_CORE_COPY_REGS(dest, regs) \
	(struct user_pt_regs )&(dest) = (regs)->user_regs;

	typedef elf_greg_t elf_gregset_t[ELF_NGREG];
	typedef struct user_fpsimd_state elf_fpregset_t;

	/*
	* When the program starts, a1 contains a pointer to a function to be
	* registered with atexit, as per the SVR4 ABI. A value of 0 means we have no
	* such handler.
	*/
	#define ELF_PLAT_INIT(_r, load_addr) (_r)->regs[0] = 0

	#define SET_PERSONALITY(ex) \
	({ \
	clear_thread_flag(TIF_32BIT); \
	current->personality &= ~READ_IMPLIES_EXEC; \
	})

	/* update AT_VECTOR_SIZE_ARCH if the number of NEW_AUX_ENT entries changes */
	#define ARCH_DLINFO \
	do { \
	NEW_AUX_ENT(AT_SYSINFO_EHDR, \
	(elf_addr_t)current->mm->context.vdso); \
	\
	/* \
	* Should always be nonzero unless there's a kernel bug. \
	* If we haven't determined a sensible value to give to \
	* userspace, omit the entry: \
	*/ \
	if (likely(signal_minsigstksz)) \
	NEW_AUX_ENT(AT_MINSIGSTKSZ, signal_minsigstksz); \
	else \
	NEW_AUX_ENT(AT_IGNORE, 0); \
	} while (0)

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

	/* 1GB of VA */
	#ifdef CONFIG_COMPAT
	#define STACK_RND_MASK (test_thread_flag(TIF_32BIT) ? \
	0x7ff >> (PAGE_SHIFT - 12) : \
	0x3ffff >> (PAGE_SHIFT - 12))
	#else
	#define STACK_RND_MASK (0x3ffff >> (PAGE_SHIFT - 12))
	#endif

	#ifdef __AARCH64EB__
	#define COMPAT_ELF_PLATFORM ("v8b")
	#else
	#define COMPAT_ELF_PLATFORM ("v8l")
	#endif

	#ifdef CONFIG_COMPAT

	/* PIE load location for compat arm. Must match ARM ELF_ET_DYN_BASE. */
	#define COMPAT_ELF_ET_DYN_BASE 0x000400000UL

	/* AArch32 registers. */
	#define COMPAT_ELF_NGREG 18
	typedef unsigned int compat_elf_greg_t;
	typedef compat_elf_greg_t compat_elf_gregset_t[COMPAT_ELF_NGREG];

	/* AArch32 EABI. */
	#define EF_ARM_EABI_MASK 0xff000000
	#define compat_elf_check_arch(x) (system_supports_32bit_el0() && \
	((x)->e_machine == EM_ARM) && \
	((x)->e_flags & EF_ARM_EABI_MASK))

	#define compat_start_thread compat_start_thread
	/*
	* Unlike the native SET_PERSONALITY macro, the compat version maintains
	* READ_IMPLIES_EXEC across an execve() since this is the behaviour on
	* arch/arm/.
	*/
	#define COMPAT_SET_PERSONALITY(ex) \
	({ \
	set_thread_flag(TIF_32BIT); \
	})
	#define COMPAT_ARCH_DLINFO
	extern int aarch32_setup_vectors_page(struct linux_binprm *bprm,
	int uses_interp);
	#define compat_arch_setup_additional_pages \
	aarch32_setup_vectors_page

	#endif /* CONFIG_COMPAT */

	#endif /* !__ASSEMBLY__ */

	#endif