1 /* SPDX-License-Identifier: GPL-2.0 */
2 
3 #ifndef __ASM_CSKY_ELF_H
4 #define __ASM_CSKY_ELF_H
5 
6 #include <asm/ptrace.h>
7 #include <abi/regdef.h>
8 
9 #define ELF_ARCH EM_CSKY
10 #define EM_CSKY_OLD 39
11 
12 /* CSKY Relocations */
13 #define R_CSKY_NONE               0
14 #define R_CSKY_32                 1
15 #define R_CSKY_PCIMM8BY4          2
16 #define R_CSKY_PCIMM11BY2         3
17 #define R_CSKY_PCIMM4BY2          4
18 #define R_CSKY_PC32               5
19 #define R_CSKY_PCRELJSR_IMM11BY2  6
20 #define R_CSKY_GNU_VTINHERIT      7
21 #define R_CSKY_GNU_VTENTRY        8
22 #define R_CSKY_RELATIVE           9
23 #define R_CSKY_COPY               10
24 #define R_CSKY_GLOB_DAT           11
25 #define R_CSKY_JUMP_SLOT          12
26 #define R_CSKY_ADDR_HI16          24
27 #define R_CSKY_ADDR_LO16          25
28 #define R_CSKY_PCRELJSR_IMM26BY2  40
29 
30 typedef unsigned long elf_greg_t;
31 
32 typedef struct user_fp elf_fpregset_t;
33 
34 /*
35  * In gdb/bfd elf32-csky.c, csky_elf_grok_prstatus() use fixed size of
36  * elf_prstatus. It's 148 for abiv1 and 220 for abiv2, the size is enough
37  * for coredump and no need full sizeof(struct pt_regs).
38  */
39 #define ELF_NGREG ((sizeof(struct pt_regs) / sizeof(elf_greg_t)) - 2)
40 
41 typedef elf_greg_t elf_gregset_t[ELF_NGREG];
42 
43 /*
44  * This is used to ensure we don't load something for the wrong architecture.
45  */
46 #define elf_check_arch(x) (((x)->e_machine == ELF_ARCH) || \
47 			   ((x)->e_machine == EM_CSKY_OLD))
48 
49 /*
50  * These are used to set parameters in the core dumps.
51  */
52 #define ELF_EXEC_PAGESIZE		4096
53 #define ELF_CLASS			ELFCLASS32
54 #define ELF_PLAT_INIT(_r, load_addr)	{ _r->a0 = 0; }
55 
56 #ifdef __cskyBE__
57 #define ELF_DATA	ELFDATA2MSB
58 #else
59 #define ELF_DATA	ELFDATA2LSB
60 #endif
61 
62 /*
63  * This is the location that an ET_DYN program is loaded if exec'ed. Typical
64  * use of this is to invoke "./ld.so someprog" to test out a new version of
65  * the loader.  We need to make sure that it is out of the way of the program
66  * that it will "exec", and that there is sufficient room for the brk.
67  */
68 #define ELF_ET_DYN_BASE	0x0UL
69 #include <abi/elf.h>
70 
71 /* Similar, but for a thread other than current. */
72 struct task_struct;
73 extern int dump_task_regs(struct task_struct *tsk, elf_gregset_t *elf_regs);
74 #define ELF_CORE_COPY_TASK_REGS(tsk, elf_regs) dump_task_regs(tsk, elf_regs)
75 
76 #define ELF_HWCAP	(0)
77 
78 /*
79  * This yields a string that ld.so will use to load implementation specific
80  * libraries for optimization. This is more specific in intent than poking
81  * at uname or /proc/cpuinfo.
82  */
83 #define ELF_PLATFORM		(NULL)
84 #define SET_PERSONALITY(ex)	set_personality(PER_LINUX)
85 
86 #define ARCH_HAS_SETUP_ADDITIONAL_PAGES 1
87 struct linux_binprm;
88 extern int arch_setup_additional_pages(struct linux_binprm *bprm,
89 				       int uses_interp);
90 #endif /* __ASM_CSKY_ELF_H */
91