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 #if defined(CONFIG_SUN3) || defined(CONFIG_COLDFIRE)
64 #define ELF_EXEC_PAGESIZE 8192
65 #else
66 #define ELF_EXEC_PAGESIZE 4096
67 #endif
68
69 /* This is the location that an ET_DYN program is loaded if exec'ed. Typical
70 use of this is to invoke "./ld.so someprog" to test out a new version of
71 the loader. We need to make sure that it is out of the way of the program
72 that it will "exec", and that there is sufficient room for the brk. */
73
74 #ifndef CONFIG_SUN3
75 #define ELF_ET_DYN_BASE 0xD0000000UL
76 #else
77 #define ELF_ET_DYN_BASE 0x0D800000UL
78 #endif
79
80 #define ELF_CORE_COPY_REGS(pr_reg, regs) \
81 /* Bleech. */ \
82 pr_reg[0] = regs->d1; \
83 pr_reg[1] = regs->d2; \
84 pr_reg[2] = regs->d3; \
85 pr_reg[3] = regs->d4; \
86 pr_reg[4] = regs->d5; \
87 pr_reg[7] = regs->a0; \
88 pr_reg[8] = regs->a1; \
89 pr_reg[9] = regs->a2; \
90 pr_reg[14] = regs->d0; \
91 pr_reg[15] = rdusp(); \
92 pr_reg[16] = regs->orig_d0; \
93 pr_reg[17] = regs->sr; \
94 pr_reg[18] = regs->pc; \
95 pr_reg[19] = (regs->format << 12) | regs->vector; \
96 { \
97 struct switch_stack *sw = ((struct switch_stack *)regs) - 1; \
98 pr_reg[5] = sw->d6; \
99 pr_reg[6] = sw->d7; \
100 pr_reg[10] = sw->a3; \
101 pr_reg[11] = sw->a4; \
102 pr_reg[12] = sw->a5; \
103 pr_reg[13] = sw->a6; \
104 }
105
106 /* This yields a mask that user programs can use to figure out what
107 instruction set this cpu supports. */
108
109 #define ELF_HWCAP (0)
110
111 /* This yields a string that ld.so will use to load implementation
112 specific libraries for optimization. This is more specific in
113 intent than poking at uname or /proc/cpuinfo. */
114
115 #define ELF_PLATFORM (NULL)
116
117 #endif