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