1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef __ASMARM_ELF_H
3 #define __ASMARM_ELF_H
4 
5 #include <asm/auxvec.h>
6 #include <asm/hwcap.h>
7 #include <asm/vdso_datapage.h>
8 
9 /*
10  * ELF register definitions..
11  */
12 #include <asm/ptrace.h>
13 #include <asm/user.h>
14 
15 struct task_struct;
16 
17 typedef unsigned long elf_greg_t;
18 typedef unsigned long elf_freg_t[3];
19 
20 #define ELF_NGREG (sizeof (struct pt_regs) / sizeof(elf_greg_t))
21 typedef elf_greg_t elf_gregset_t[ELF_NGREG];
22 
23 typedef struct user_fp elf_fpregset_t;
24 
25 #define EF_ARM_EABI_MASK	0xff000000
26 #define EF_ARM_EABI_UNKNOWN	0x00000000
27 #define EF_ARM_EABI_VER1	0x01000000
28 #define EF_ARM_EABI_VER2	0x02000000
29 #define EF_ARM_EABI_VER3	0x03000000
30 #define EF_ARM_EABI_VER4	0x04000000
31 #define EF_ARM_EABI_VER5	0x05000000
32 
33 #define EF_ARM_BE8		0x00800000	/* ABI 4,5 */
34 #define EF_ARM_LE8		0x00400000	/* ABI 4,5 */
35 #define EF_ARM_MAVERICK_FLOAT	0x00000800	/* ABI 0 */
36 #define EF_ARM_VFP_FLOAT	0x00000400	/* ABI 0 */
37 #define EF_ARM_SOFT_FLOAT	0x00000200	/* ABI 0 */
38 #define EF_ARM_OLD_ABI		0x00000100	/* ABI 0 */
39 #define EF_ARM_NEW_ABI		0x00000080	/* ABI 0 */
40 #define EF_ARM_ALIGN8		0x00000040	/* ABI 0 */
41 #define EF_ARM_PIC		0x00000020	/* ABI 0 */
42 #define EF_ARM_MAPSYMSFIRST	0x00000010	/* ABI 2 */
43 #define EF_ARM_APCS_FLOAT	0x00000010	/* ABI 0, floats in fp regs */
44 #define EF_ARM_DYNSYMSUSESEGIDX	0x00000008	/* ABI 2 */
45 #define EF_ARM_APCS_26		0x00000008	/* ABI 0 */
46 #define EF_ARM_SYMSARESORTED	0x00000004	/* ABI 1,2 */
47 #define EF_ARM_INTERWORK	0x00000004	/* ABI 0 */
48 #define EF_ARM_HASENTRY		0x00000002	/* All */
49 #define EF_ARM_RELEXEC		0x00000001	/* All */
50 
51 #define R_ARM_NONE		0
52 #define R_ARM_PC24		1
53 #define R_ARM_ABS32		2
54 #define R_ARM_REL32		3
55 #define R_ARM_CALL		28
56 #define R_ARM_JUMP24		29
57 #define R_ARM_TARGET1		38
58 #define R_ARM_V4BX		40
59 #define R_ARM_PREL31		42
60 #define R_ARM_MOVW_ABS_NC	43
61 #define R_ARM_MOVT_ABS		44
62 #define R_ARM_MOVW_PREL_NC	45
63 #define R_ARM_MOVT_PREL		46
64 #define R_ARM_ALU_PC_G0_NC	57
65 #define R_ARM_ALU_PC_G1_NC	59
66 #define R_ARM_LDR_PC_G2		63
67 
68 #define R_ARM_THM_CALL		10
69 #define R_ARM_THM_JUMP24	30
70 #define R_ARM_THM_MOVW_ABS_NC	47
71 #define R_ARM_THM_MOVT_ABS	48
72 #define R_ARM_THM_MOVW_PREL_NC	49
73 #define R_ARM_THM_MOVT_PREL	50
74 
75 /*
76  * These are used to set parameters in the core dumps.
77  */
78 #define ELF_CLASS	ELFCLASS32
79 #ifdef __ARMEB__
80 #define ELF_DATA	ELFDATA2MSB
81 #else
82 #define ELF_DATA	ELFDATA2LSB
83 #endif
84 #define ELF_ARCH	EM_ARM
85 
86 /*
87  * This yields a string that ld.so will use to load implementation
88  * specific libraries for optimization.  This is more specific in
89  * intent than poking at uname or /proc/cpuinfo.
90  *
91  * For now we just provide a fairly general string that describes the
92  * processor family.  This could be made more specific later if someone
93  * implemented optimisations that require it.  26-bit CPUs give you
94  * "v1l" for ARM2 (no SWP) and "v2l" for anything else (ARM1 isn't
95  * supported).  32-bit CPUs give you "v3[lb]" for anything based on an
96  * ARM6 or ARM7 core and "armv4[lb]" for anything based on a StrongARM-1
97  * core.
98  */
99 #define ELF_PLATFORM_SIZE 8
100 #define ELF_PLATFORM	(elf_platform)
101 
102 extern char elf_platform[];
103 
104 struct elf32_hdr;
105 
106 /*
107  * This is used to ensure we don't load something for the wrong architecture.
108  */
109 extern int elf_check_arch(const struct elf32_hdr *);
110 #define elf_check_arch elf_check_arch
111 
112 #define ELFOSABI_ARM_FDPIC  65	/* ARM FDPIC platform */
113 #define elf_check_fdpic(x)  ((x)->e_ident[EI_OSABI] == ELFOSABI_ARM_FDPIC)
114 #define elf_check_const_displacement(x)  ((x)->e_flags & EF_ARM_PIC)
115 #define ELF_FDPIC_CORE_EFLAGS  0
116 
117 #define vmcore_elf64_check_arch(x) (0)
118 
119 extern int arm_elf_read_implies_exec(int);
120 #define elf_read_implies_exec(ex,stk) arm_elf_read_implies_exec(stk)
121 
122 #define CORE_DUMP_USE_REGSET
123 #define ELF_EXEC_PAGESIZE	4096
124 
125 /* This is the base location for PIE (ET_DYN with INTERP) loads. */
126 #define ELF_ET_DYN_BASE		0x400000UL
127 
128 /* When the program starts, a1 contains a pointer to a function to be
129    registered with atexit, as per the SVR4 ABI.  A value of 0 means we
130    have no such handler.  */
131 #define ELF_PLAT_INIT(_r, load_addr)	(_r)->ARM_r0 = 0
132 
133 #define ELF_FDPIC_PLAT_INIT(_r, _exec_map_addr, _interp_map_addr, dynamic_addr) \
134 	do { \
135 		(_r)->ARM_r7 = _exec_map_addr; \
136 		(_r)->ARM_r8 = _interp_map_addr; \
137 		(_r)->ARM_r9 = dynamic_addr; \
138 	} while(0)
139 
140 extern void elf_set_personality(const struct elf32_hdr *);
141 #define SET_PERSONALITY(ex)	elf_set_personality(&(ex))
142 
143 #ifdef CONFIG_MMU
144 #ifdef CONFIG_VDSO
145 #define ARCH_DLINFO						\
146 do {								\
147 	NEW_AUX_ENT(AT_SYSINFO_EHDR,				\
148 		    (elf_addr_t)current->mm->context.vdso);	\
149 } while (0)
150 #endif
151 #define ARCH_HAS_SETUP_ADDITIONAL_PAGES 1
152 struct linux_binprm;
153 int arch_setup_additional_pages(struct linux_binprm *, int);
154 #endif
155 
156 #endif
157