xref: /openbmc/linux/arch/arm64/include/asm/elf.h (revision 82003e04)
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 
27 /*
28  * AArch64 static relocation types.
29  */
30 
31 /* Miscellaneous. */
32 #define R_ARM_NONE			0
33 #define R_AARCH64_NONE			256
34 
35 /* Data. */
36 #define R_AARCH64_ABS64			257
37 #define R_AARCH64_ABS32			258
38 #define R_AARCH64_ABS16			259
39 #define R_AARCH64_PREL64		260
40 #define R_AARCH64_PREL32		261
41 #define R_AARCH64_PREL16		262
42 
43 /* Instructions. */
44 #define R_AARCH64_MOVW_UABS_G0		263
45 #define R_AARCH64_MOVW_UABS_G0_NC	264
46 #define R_AARCH64_MOVW_UABS_G1		265
47 #define R_AARCH64_MOVW_UABS_G1_NC	266
48 #define R_AARCH64_MOVW_UABS_G2		267
49 #define R_AARCH64_MOVW_UABS_G2_NC	268
50 #define R_AARCH64_MOVW_UABS_G3		269
51 
52 #define R_AARCH64_MOVW_SABS_G0		270
53 #define R_AARCH64_MOVW_SABS_G1		271
54 #define R_AARCH64_MOVW_SABS_G2		272
55 
56 #define R_AARCH64_LD_PREL_LO19		273
57 #define R_AARCH64_ADR_PREL_LO21		274
58 #define R_AARCH64_ADR_PREL_PG_HI21	275
59 #define R_AARCH64_ADR_PREL_PG_HI21_NC	276
60 #define R_AARCH64_ADD_ABS_LO12_NC	277
61 #define R_AARCH64_LDST8_ABS_LO12_NC	278
62 
63 #define R_AARCH64_TSTBR14		279
64 #define R_AARCH64_CONDBR19		280
65 #define R_AARCH64_JUMP26		282
66 #define R_AARCH64_CALL26		283
67 #define R_AARCH64_LDST16_ABS_LO12_NC	284
68 #define R_AARCH64_LDST32_ABS_LO12_NC	285
69 #define R_AARCH64_LDST64_ABS_LO12_NC	286
70 #define R_AARCH64_LDST128_ABS_LO12_NC	299
71 
72 #define R_AARCH64_MOVW_PREL_G0		287
73 #define R_AARCH64_MOVW_PREL_G0_NC	288
74 #define R_AARCH64_MOVW_PREL_G1		289
75 #define R_AARCH64_MOVW_PREL_G1_NC	290
76 #define R_AARCH64_MOVW_PREL_G2		291
77 #define R_AARCH64_MOVW_PREL_G2_NC	292
78 #define R_AARCH64_MOVW_PREL_G3		293
79 
80 #define R_AARCH64_RELATIVE		1027
81 
82 /*
83  * These are used to set parameters in the core dumps.
84  */
85 #define ELF_CLASS	ELFCLASS64
86 #ifdef __AARCH64EB__
87 #define ELF_DATA	ELFDATA2MSB
88 #else
89 #define ELF_DATA	ELFDATA2LSB
90 #endif
91 #define ELF_ARCH	EM_AARCH64
92 
93 /*
94  * This yields a string that ld.so will use to load implementation
95  * specific libraries for optimization.  This is more specific in
96  * intent than poking at uname or /proc/cpuinfo.
97  */
98 #define ELF_PLATFORM_SIZE	16
99 #ifdef __AARCH64EB__
100 #define ELF_PLATFORM		("aarch64_be")
101 #else
102 #define ELF_PLATFORM		("aarch64")
103 #endif
104 
105 /*
106  * This is used to ensure we don't load something for the wrong architecture.
107  */
108 #define elf_check_arch(x)		((x)->e_machine == EM_AARCH64)
109 
110 #define elf_read_implies_exec(ex,stk)	(stk != EXSTACK_DISABLE_X)
111 
112 #define CORE_DUMP_USE_REGSET
113 #define ELF_EXEC_PAGESIZE	PAGE_SIZE
114 
115 /*
116  * This is the location that an ET_DYN program is loaded if exec'ed.  Typical
117  * use of this is to invoke "./ld.so someprog" to test out a new version of
118  * the loader.  We need to make sure that it is out of the way of the program
119  * that it will "exec", and that there is sufficient room for the brk.
120  */
121 #define ELF_ET_DYN_BASE	(2 * TASK_SIZE_64 / 3)
122 
123 #ifndef __ASSEMBLY__
124 
125 typedef unsigned long elf_greg_t;
126 
127 #define ELF_NGREG (sizeof(struct user_pt_regs) / sizeof(elf_greg_t))
128 #define ELF_CORE_COPY_REGS(dest, regs)	\
129 	*(struct user_pt_regs *)&(dest) = (regs)->user_regs;
130 
131 typedef elf_greg_t elf_gregset_t[ELF_NGREG];
132 typedef struct user_fpsimd_state elf_fpregset_t;
133 
134 /*
135  * When the program starts, a1 contains a pointer to a function to be
136  * registered with atexit, as per the SVR4 ABI.  A value of 0 means we have no
137  * such handler.
138  */
139 #define ELF_PLAT_INIT(_r, load_addr)	(_r)->regs[0] = 0
140 
141 #define SET_PERSONALITY(ex)		clear_thread_flag(TIF_32BIT);
142 
143 /* update AT_VECTOR_SIZE_ARCH if the number of NEW_AUX_ENT entries changes */
144 #define ARCH_DLINFO							\
145 do {									\
146 	NEW_AUX_ENT(AT_SYSINFO_EHDR,					\
147 		    (elf_addr_t)current->mm->context.vdso);		\
148 } while (0)
149 
150 #define ARCH_HAS_SETUP_ADDITIONAL_PAGES
151 struct linux_binprm;
152 extern int arch_setup_additional_pages(struct linux_binprm *bprm,
153 				       int uses_interp);
154 
155 /* 1GB of VA */
156 #ifdef CONFIG_COMPAT
157 #define STACK_RND_MASK			(test_thread_flag(TIF_32BIT) ? \
158 						0x7ff >> (PAGE_SHIFT - 12) : \
159 						0x3ffff >> (PAGE_SHIFT - 12))
160 #else
161 #define STACK_RND_MASK			(0x3ffff >> (PAGE_SHIFT - 12))
162 #endif
163 
164 #ifdef __AARCH64EB__
165 #define COMPAT_ELF_PLATFORM		("v8b")
166 #else
167 #define COMPAT_ELF_PLATFORM		("v8l")
168 #endif
169 
170 #ifdef CONFIG_COMPAT
171 
172 #define COMPAT_ELF_ET_DYN_BASE		(2 * TASK_SIZE_32 / 3)
173 
174 /* AArch32 registers. */
175 #define COMPAT_ELF_NGREG		18
176 typedef unsigned int			compat_elf_greg_t;
177 typedef compat_elf_greg_t		compat_elf_gregset_t[COMPAT_ELF_NGREG];
178 
179 /* AArch32 EABI. */
180 #define EF_ARM_EABI_MASK		0xff000000
181 #define compat_elf_check_arch(x)	(system_supports_32bit_el0() && \
182 					 ((x)->e_machine == EM_ARM) && \
183 					 ((x)->e_flags & EF_ARM_EABI_MASK))
184 
185 #define compat_start_thread		compat_start_thread
186 #define COMPAT_SET_PERSONALITY(ex)	set_thread_flag(TIF_32BIT);
187 #define COMPAT_ARCH_DLINFO
188 extern int aarch32_setup_vectors_page(struct linux_binprm *bprm,
189 				      int uses_interp);
190 #define compat_arch_setup_additional_pages \
191 					aarch32_setup_vectors_page
192 
193 #endif /* CONFIG_COMPAT */
194 
195 #endif /* !__ASSEMBLY__ */
196 
197 #endif
198