1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2 /*
3  * Copyright (C) 2008-2009 Michal Simek <monstr@monstr.eu>
4  * Copyright (C) 2008-2009 PetaLogix
5  * Copyright (C) 2006 Atmark Techno, Inc.
6  *
7  * This file is subject to the terms and conditions of the GNU General Public
8  * License. See the file "COPYING" in the main directory of this archive
9  * for more details.
10  */
11 
12 #ifndef _UAPI_ASM_MICROBLAZE_ELF_H
13 #define _UAPI_ASM_MICROBLAZE_ELF_H
14 
15 #include <linux/elf-em.h>
16 
17 /*
18  * Note there is no "official" ELF designation for Microblaze.
19  * I've snaffled the value from the microblaze binutils source code
20  * /binutils/microblaze/include/elf/microblaze.h
21  */
22 #define EM_MICROBLAZE_OLD	0xbaab
23 #define ELF_ARCH		EM_MICROBLAZE
24 
25 /*
26  * This is used to ensure we don't load something for the wrong architecture.
27  */
28 #define elf_check_arch(x)	((x)->e_machine == EM_MICROBLAZE \
29 				 || (x)->e_machine == EM_MICROBLAZE_OLD)
30 
31 /*
32  * These are used to set parameters in the core dumps.
33  */
34 #define ELF_CLASS	ELFCLASS32
35 
36 #ifndef __uClinux__
37 
38 /*
39  * ELF register definitions..
40  */
41 
42 #include <asm/ptrace.h>
43 #include <asm/byteorder.h>
44 
45 #ifndef ELF_GREG_T
46 #define ELF_GREG_T
47 typedef unsigned long elf_greg_t;
48 #endif
49 
50 #ifndef ELF_NGREG
51 #define ELF_NGREG (sizeof(struct pt_regs) / sizeof(elf_greg_t))
52 #endif
53 
54 #ifndef ELF_GREGSET_T
55 #define ELF_GREGSET_T
56 typedef elf_greg_t elf_gregset_t[ELF_NGREG];
57 #endif
58 
59 #ifndef ELF_FPREGSET_T
60 #define ELF_FPREGSET_T
61 
62 /* TBD */
63 #define ELF_NFPREG	33	/* includes fsr */
64 typedef unsigned long elf_fpreg_t;
65 typedef elf_fpreg_t elf_fpregset_t[ELF_NFPREG];
66 
67 /* typedef struct user_fpu_struct elf_fpregset_t; */
68 #endif
69 
70 /* This is the location that an ET_DYN program is loaded if exec'ed.  Typical
71  * use of this is to invoke "./ld.so someprog" to test out a new version of
72  * the loader.  We need to make sure that it is out of the way of the program
73  * that it will "exec", and that there is sufficient room for the brk.
74  */
75 
76 #define ELF_ET_DYN_BASE         (0x08000000)
77 
78 #ifdef __MICROBLAZEEL__
79 #define ELF_DATA	ELFDATA2LSB
80 #else
81 #define ELF_DATA	ELFDATA2MSB
82 #endif
83 
84 #define ELF_EXEC_PAGESIZE	PAGE_SIZE
85 
86 
87 #define ELF_CORE_COPY_REGS(_dest, _regs)			\
88 	memcpy((char *) &_dest, (char *) _regs,		\
89 	sizeof(struct pt_regs));
90 
91 /* This yields a mask that user programs can use to figure out what
92  * instruction set this CPU supports.  This could be done in user space,
93  * but it's not easy, and we've already done it here.
94  */
95 #define ELF_HWCAP	(0)
96 
97 /* This yields a string that ld.so will use to load implementation
98  * specific libraries for optimization.  This is more specific in
99  * intent than poking at uname or /proc/cpuinfo.
100 
101  * For the moment, we have only optimizations for the Intel generations,
102  * but that could change...
103  */
104 #define ELF_PLATFORM  (NULL)
105 
106 /* Added _f parameter. Is this definition correct: TBD */
107 #define ELF_PLAT_INIT(_r, _f)				\
108 do {							\
109 	_r->r0 =  _r->r1 =  _r->r2 =  _r->r3 =		\
110 	_r->r4 =  _r->r5 =  _r->r6 =  _r->r7 =		\
111 	_r->r8 =  _r->r9 =  _r->r10 = _r->r11 =		\
112 	_r->r12 = _r->r13 = _r->r14 = _r->r15 =		\
113 	_r->r16 = _r->r17 = _r->r18 = _r->r19 =		\
114 	_r->r20 = _r->r21 = _r->r22 = _r->r23 =		\
115 	_r->r24 = _r->r25 = _r->r26 = _r->r27 =		\
116 	_r->r28 = _r->r29 = _r->r30 = _r->r31 =		\
117 	0;						\
118 } while (0)
119 
120 
121 #endif /* __uClinux__ */
122 
123 #endif /* _UAPI_ASM_MICROBLAZE_ELF_H */
124