1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef __ASMm68k_ELF_H
3 #define __ASMm68k_ELF_H
4
5 /*
6 * ELF register definitions..
7 */
8
9 #include <asm/ptrace.h>
10 #include <asm/user.h>
11
12 /*
13 * 68k ELF relocation types
14 */
15 #define R_68K_NONE 0
16 #define R_68K_32 1
17 #define R_68K_16 2
18 #define R_68K_8 3
19 #define R_68K_PC32 4
20 #define R_68K_PC16 5
21 #define R_68K_PC8 6
22 #define R_68K_GOT32 7
23 #define R_68K_GOT16 8
24 #define R_68K_GOT8 9
25 #define R_68K_GOT32O 10
26 #define R_68K_GOT16O 11
27 #define R_68K_GOT8O 12
28 #define R_68K_PLT32 13
29 #define R_68K_PLT16 14
30 #define R_68K_PLT8 15
31 #define R_68K_PLT32O 16
32 #define R_68K_PLT16O 17
33 #define R_68K_PLT8O 18
34 #define R_68K_COPY 19
35 #define R_68K_GLOB_DAT 20
36 #define R_68K_JMP_SLOT 21
37 #define R_68K_RELATIVE 22
38
39 typedef unsigned long elf_greg_t;
40
41 #define ELF_NGREG (sizeof(struct user_regs_struct) / sizeof(elf_greg_t))
42 typedef elf_greg_t elf_gregset_t[ELF_NGREG];
43
44 typedef struct user_m68kfp_struct elf_fpregset_t;
45
46 /*
47 * This is used to ensure we don't load something for the wrong architecture.
48 */
49 #define elf_check_arch(x) ((x)->e_machine == EM_68K)
50
51 /*
52 * These are used to set parameters in the core dumps.
53 */
54 #define ELF_CLASS ELFCLASS32
55 #define ELF_DATA ELFDATA2MSB
56 #define ELF_ARCH EM_68K
57
58 /* For SVR4/m68k the function pointer to be registered with `atexit' is
59 passed in %a1. Although my copy of the ABI has no such statement, it
60 is actually used on ASV. */
61 #define ELF_PLAT_INIT(_r, load_addr) _r->a1 = 0
62
63 #define ELF_FDPIC_PLAT_INIT(_r, _exec_map_addr, _interp_map_addr, dynamic_addr) \
64 do { \
65 (_r)->d3 = _exec_map_addr; \
66 (_r)->d4 = _interp_map_addr; \
67 (_r)->d5 = dynamic_addr; \
68 } while(0)
69
70 #if defined(CONFIG_SUN3) || defined(CONFIG_COLDFIRE)
71 #define ELF_EXEC_PAGESIZE 8192
72 #else
73 #define ELF_EXEC_PAGESIZE 4096
74 #endif
75
76 /* This is the location that an ET_DYN program is loaded if exec'ed. Typical
77 use of this is to invoke "./ld.so someprog" to test out a new version of
78 the loader. We need to make sure that it is out of the way of the program
79 that it will "exec", and that there is sufficient room for the brk. */
80
81 #ifndef CONFIG_SUN3
82 #define ELF_ET_DYN_BASE 0xD0000000UL
83 #else
84 #define ELF_ET_DYN_BASE 0x0D800000UL
85 #endif
86
87 #define ELF_CORE_COPY_REGS(pr_reg, regs) \
88 /* Bleech. */ \
89 pr_reg[0] = regs->d1; \
90 pr_reg[1] = regs->d2; \
91 pr_reg[2] = regs->d3; \
92 pr_reg[3] = regs->d4; \
93 pr_reg[4] = regs->d5; \
94 pr_reg[7] = regs->a0; \
95 pr_reg[8] = regs->a1; \
96 pr_reg[9] = regs->a2; \
97 pr_reg[14] = regs->d0; \
98 pr_reg[15] = rdusp(); \
99 pr_reg[16] = regs->orig_d0; \
100 pr_reg[17] = regs->sr; \
101 pr_reg[18] = regs->pc; \
102 pr_reg[19] = (regs->format << 12) | regs->vector; \
103 { \
104 struct switch_stack *sw = ((struct switch_stack *)regs) - 1; \
105 pr_reg[5] = sw->d6; \
106 pr_reg[6] = sw->d7; \
107 pr_reg[10] = sw->a3; \
108 pr_reg[11] = sw->a4; \
109 pr_reg[12] = sw->a5; \
110 pr_reg[13] = sw->a6; \
111 }
112
113 /* This yields a mask that user programs can use to figure out what
114 instruction set this cpu supports. */
115
116 #define ELF_HWCAP (0)
117
118 /* This yields a string that ld.so will use to load implementation
119 specific libraries for optimization. This is more specific in
120 intent than poking at uname or /proc/cpuinfo. */
121
122 #define ELF_PLATFORM (NULL)
123
124 #define ELF_FDPIC_CORE_EFLAGS 0
125
126 #endif
127
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