1/*
2 * Copyright (C) 2012 ARM Ltd.
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation.
7 *
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
11 * GNU General Public License for more details.
12 *
13 * You should have received a copy of the GNU General Public License
14 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
15 */
16#ifndef __ASM_ELF_H
17#define __ASM_ELF_H
18
19#include <asm/hwcap.h>
20
21/*
22 * ELF register definitions..
23 */
24#include <asm/ptrace.h>
25#include <asm/user.h>
26
27typedef unsigned long elf_greg_t;
28
29#define ELF_NGREG (sizeof(struct user_pt_regs) / sizeof(elf_greg_t))
30#define ELF_CORE_COPY_REGS(dest, regs)	\
31	*(struct user_pt_regs *)&(dest) = (regs)->user_regs;
32
33typedef elf_greg_t elf_gregset_t[ELF_NGREG];
34typedef struct user_fpsimd_state elf_fpregset_t;
35
36/*
37 * AArch64 static relocation types.
38 */
39
40/* Miscellaneous. */
41#define R_ARM_NONE			0
42#define R_AARCH64_NONE			256
43
44/* Data. */
45#define R_AARCH64_ABS64			257
46#define R_AARCH64_ABS32			258
47#define R_AARCH64_ABS16			259
48#define R_AARCH64_PREL64		260
49#define R_AARCH64_PREL32		261
50#define R_AARCH64_PREL16		262
51
52/* Instructions. */
53#define R_AARCH64_MOVW_UABS_G0		263
54#define R_AARCH64_MOVW_UABS_G0_NC	264
55#define R_AARCH64_MOVW_UABS_G1		265
56#define R_AARCH64_MOVW_UABS_G1_NC	266
57#define R_AARCH64_MOVW_UABS_G2		267
58#define R_AARCH64_MOVW_UABS_G2_NC	268
59#define R_AARCH64_MOVW_UABS_G3		269
60
61#define R_AARCH64_MOVW_SABS_G0		270
62#define R_AARCH64_MOVW_SABS_G1		271
63#define R_AARCH64_MOVW_SABS_G2		272
64
65#define R_AARCH64_LD_PREL_LO19		273
66#define R_AARCH64_ADR_PREL_LO21		274
67#define R_AARCH64_ADR_PREL_PG_HI21	275
68#define R_AARCH64_ADR_PREL_PG_HI21_NC	276
69#define R_AARCH64_ADD_ABS_LO12_NC	277
70#define R_AARCH64_LDST8_ABS_LO12_NC	278
71
72#define R_AARCH64_TSTBR14		279
73#define R_AARCH64_CONDBR19		280
74#define R_AARCH64_JUMP26		282
75#define R_AARCH64_CALL26		283
76#define R_AARCH64_LDST16_ABS_LO12_NC	284
77#define R_AARCH64_LDST32_ABS_LO12_NC	285
78#define R_AARCH64_LDST64_ABS_LO12_NC	286
79#define R_AARCH64_LDST128_ABS_LO12_NC	299
80
81#define R_AARCH64_MOVW_PREL_G0		287
82#define R_AARCH64_MOVW_PREL_G0_NC	288
83#define R_AARCH64_MOVW_PREL_G1		289
84#define R_AARCH64_MOVW_PREL_G1_NC	290
85#define R_AARCH64_MOVW_PREL_G2		291
86#define R_AARCH64_MOVW_PREL_G2_NC	292
87#define R_AARCH64_MOVW_PREL_G3		293
88
89/*
90 * These are used to set parameters in the core dumps.
91 */
92#define ELF_CLASS	ELFCLASS64
93#ifdef __AARCH64EB__
94#define ELF_DATA	ELFDATA2MSB
95#else
96#define ELF_DATA	ELFDATA2LSB
97#endif
98#define ELF_ARCH	EM_AARCH64
99
100/*
101 * This yields a string that ld.so will use to load implementation
102 * specific libraries for optimization.  This is more specific in
103 * intent than poking at uname or /proc/cpuinfo.
104 */
105#define ELF_PLATFORM_SIZE	16
106#ifdef __AARCH64EB__
107#define ELF_PLATFORM		("aarch64_be")
108#else
109#define ELF_PLATFORM		("aarch64")
110#endif
111
112/*
113 * This is used to ensure we don't load something for the wrong architecture.
114 */
115#define elf_check_arch(x)		((x)->e_machine == EM_AARCH64)
116
117#define elf_read_implies_exec(ex,stk)	(stk != EXSTACK_DISABLE_X)
118
119#define CORE_DUMP_USE_REGSET
120#define ELF_EXEC_PAGESIZE	PAGE_SIZE
121
122/*
123 * This is the location that an ET_DYN program is loaded if exec'ed.  Typical
124 * use of this is to invoke "./ld.so someprog" to test out a new version of
125 * the loader.  We need to make sure that it is out of the way of the program
126 * that it will "exec", and that there is sufficient room for the brk.
127 */
128#define ELF_ET_DYN_BASE	(2 * TASK_SIZE_64 / 3)
129
130/*
131 * When the program starts, a1 contains a pointer to a function to be
132 * registered with atexit, as per the SVR4 ABI.  A value of 0 means we have no
133 * such handler.
134 */
135#define ELF_PLAT_INIT(_r, load_addr)	(_r)->regs[0] = 0
136
137#define SET_PERSONALITY(ex)		clear_thread_flag(TIF_32BIT);
138
139#define ARCH_DLINFO							\
140do {									\
141	NEW_AUX_ENT(AT_SYSINFO_EHDR,					\
142		    (elf_addr_t)current->mm->context.vdso);		\
143} while (0)
144
145#define ARCH_HAS_SETUP_ADDITIONAL_PAGES
146struct linux_binprm;
147extern int arch_setup_additional_pages(struct linux_binprm *bprm,
148				       int uses_interp);
149
150/* 1GB of VA */
151#ifdef CONFIG_COMPAT
152#define STACK_RND_MASK			(test_thread_flag(TIF_32BIT) ? \
153						0x7ff >> (PAGE_SHIFT - 12) : \
154						0x3ffff >> (PAGE_SHIFT - 12))
155#else
156#define STACK_RND_MASK			(0x3ffff >> (PAGE_SHIFT - 12))
157#endif
158
159#ifdef CONFIG_COMPAT
160
161#ifdef __AARCH64EB__
162#define COMPAT_ELF_PLATFORM		("v8b")
163#else
164#define COMPAT_ELF_PLATFORM		("v8l")
165#endif
166
167#define COMPAT_ELF_ET_DYN_BASE		(2 * TASK_SIZE_32 / 3)
168
169/* AArch32 registers. */
170#define COMPAT_ELF_NGREG		18
171typedef unsigned int			compat_elf_greg_t;
172typedef compat_elf_greg_t		compat_elf_gregset_t[COMPAT_ELF_NGREG];
173
174/* AArch32 EABI. */
175#define EF_ARM_EABI_MASK		0xff000000
176#define compat_elf_check_arch(x)	(((x)->e_machine == EM_ARM) && \
177					 ((x)->e_flags & EF_ARM_EABI_MASK))
178
179#define compat_start_thread		compat_start_thread
180#define COMPAT_SET_PERSONALITY(ex)	set_thread_flag(TIF_32BIT);
181#define COMPAT_ARCH_DLINFO
182extern int aarch32_setup_vectors_page(struct linux_binprm *bprm,
183				      int uses_interp);
184#define compat_arch_setup_additional_pages \
185					aarch32_setup_vectors_page
186
187#endif /* CONFIG_COMPAT */
188
189#endif
190