Root/target/linux/ubicom32/files/arch/ubicom32/include/asm/elf.h

1/*
2 * arch/ubicom32/include/asm/elf.h
3 * Definitions for elf executable format for Ubicom32 architecture.
4 *
5 * (C) Copyright 2009, Ubicom, Inc.
6 *
7 * This file is part of the Ubicom32 Linux Kernel Port.
8 *
9 * The Ubicom32 Linux Kernel Port is free software: you can redistribute
10 * it and/or modify it under the terms of the GNU General Public License
11 * as published by the Free Software Foundation, either version 2 of the
12 * License, or (at your option) any later version.
13 *
14 * The Ubicom32 Linux Kernel Port is distributed in the hope that it
15 * will be useful, but WITHOUT ANY WARRANTY; without even the implied
16 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
17 * the GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with the Ubicom32 Linux Kernel Port. If not,
21 * see <http://www.gnu.org/licenses/>.
22 *
23 * Ubicom32 implementation derived from (with many thanks):
24 * arch/m68knommu
25 * arch/blackfin
26 * arch/parisc
27 */
28#ifndef _ASM_UBICOM32_ELF_H
29#define _ASM_UBICOM32_ELF_H
30
31/*
32 * ELF register definitions..
33 */
34
35#include <asm/ptrace.h>
36#include <asm/user.h>
37
38/*
39 * Processor specific flags for the ELF header e_flags field.
40 */
41#define EF_UBICOM32_V3 0x00000001 /* -fmarch=ubicom32v3 */
42#define EF_UBICOM32_V4 0x00000002 /* -fmarch=ubicom32v4 */
43#define EF_UBICOM32_PIC 0x80000000 /* -fpic */
44#define EF_UBICOM32_FDPIC 0x40000000 /* -mfdpic */
45
46/*
47 * Ubicom32 ELF relocation types
48 */
49#define R_UBICOM32_NONE 0
50#define R_UBICOM32_16 1
51#define R_UBICOM32_32 2
52#define R_UBICOM32_LO16 3
53#define R_UBICOM32_HI16 4
54#define R_UBICOM32_21_PCREL 5
55#define R_UBICOM32_24_PCREL 6
56#define R_UBICOM32_HI24 7
57#define R_UBICOM32_LO7_S 8
58#define R_UBICOM32_LO7_2_S 9
59#define R_UBICOM32_LO7_4_S 10
60#define R_UBICOM32_LO7_D 11
61#define R_UBICOM32_LO7_2_D 12
62#define R_UBICOM32_LO7_4_D 13
63#define R_UBICOM32_32_HARVARD 14
64#define R_UBICOM32_LO7_CALLI 15
65#define R_UBICOM32_LO16_CALLI 16
66#define R_UBICOM32_GOT_HI24 17
67#define R_UBICOM32_GOT_LO7_S 18
68#define R_UBICOM32_GOT_LO7_2_S 19
69#define R_UBICOM32_GOT_LO7_4_S 20
70#define R_UBICOM32_GOT_LO7_D 21
71#define R_UBICOM32_GOT_LO7_2_D 22
72#define R_UBICOM32_GOT_LO7_4_D 23
73#define R_UBICOM32_FUNCDESC_GOT_HI24 24
74#define R_UBICOM32_FUNCDESC_GOT_LO7_S 25
75#define R_UBICOM32_FUNCDESC_GOT_LO7_2_S 26
76#define R_UBICOM32_FUNCDESC_GOT_LO7_4_S 27
77#define R_UBICOM32_FUNCDESC_GOT_LO7_D 28
78#define R_UBICOM32_FUNCDESC_GOT_LO7_2_D 29
79#define R_UBICOM32_FUNCDESC_GOT_LO7_4_D 30
80#define R_UBICOM32_GOT_LO7_CALLI 31
81#define R_UBICOM32_FUNCDESC_GOT_LO7_CALLI 32
82#define R_UBICOM32_FUNCDESC_VALUE 33
83#define R_UBICOM32_FUNCDESC 34
84#define R_UBICOM32_GOTOFFSET_LO 35
85#define R_UBICOM32_GOTOFFSET_HI 36
86#define R_UBICOM32_FUNCDESC_GOTOFFSET_LO 37
87#define R_UBICOM32_FUNCDESC_GOTOFFSET_HI 38
88#define R_UBICOM32_GNU_VTINHERIT 200
89#define R_UBICOM32_GNU_VTENTRY 201
90
91typedef unsigned long elf_greg_t;
92
93#define ELF_NGREG (sizeof(struct pt_regs) / sizeof(elf_greg_t))
94typedef elf_greg_t elf_gregset_t[ELF_NGREG];
95
96typedef struct user_ubicom32fp_struct elf_fpregset_t;
97
98/*
99 * This is used to ensure we don't load something for the wrong architecture.
100 */
101#define elf_check_arch(x) ((x)->e_machine == EM_UBICOM32)
102
103#define elf_check_fdpic(x) ((x)->e_flags & EF_UBICOM32_FDPIC)
104
105#define elf_check_const_displacement(x) ((x)->e_flags & EF_UBICOM32_PIC)
106
107/*
108 * These are used to set parameters in the core dumps.
109 */
110#define ELF_CLASS ELFCLASS32
111#define ELF_DATA ELFDATA2MSB
112#define ELF_ARCH EM_UBICOM32
113
114/* For SVR4/m68k the function pointer to be registered with `atexit' is
115   passed in %a1. Although my copy of the ABI has no such statement, it
116   is actually used on ASV. */
117#define ELF_PLAT_INIT(_r, load_addr) _r->a1 = 0
118
119#define ELF_FDPIC_PLAT_INIT(_regs, _exec_map_addr, _interp_map_addr, \
120                _dynamic_addr) \
121    do { \
122        _regs->dn[1] = _exec_map_addr; \
123        _regs->dn[2] = _interp_map_addr; \
124        _regs->dn[3] = _dynamic_addr; \
125        _regs->an[1] = 0; /* dl_fini will be set by ldso */ \
126    } while (0)
127
128#define USE_ELF_CORE_DUMP
129#define ELF_EXEC_PAGESIZE 4096
130
131#ifdef __KERNEL__
132#ifdef CONFIG_UBICOM32_V4
133#define ELF_FDPIC_CORE_EFLAGS (EF_UBICOM32_FDPIC | EF_UBICOM32_V4)
134#elif defined CONFIG_UBICOM32_V3
135#define ELF_FDPIC_CORE_EFLAGS (EF_UBICOM32_FDPIC | EF_UBICOM32_V3)
136#else
137#error Unknown/Unsupported ubicom32 architecture.
138#endif
139#endif
140
141/* This is the location that an ET_DYN program is loaded if exec'ed. Typical
142   use of this is to invoke "./ld.so someprog" to test out a new version of
143   the loader. We need to make sure that it is out of the way of the program
144   that it will "exec", and that there is sufficient room for the brk. */
145
146#define ELF_ET_DYN_BASE 0xD0000000UL
147
148/*
149 * For Ubicom32, the elf_gregset_t and struct pt_regs are the same size
150 * data structure so a copy is performed instead of providing the
151 * ELF_CORE_COPY_REGS macro.
152 */
153
154/*
155 * ELF_CORE_COPY_TASK_REGS is needed to dump register state from multi threaded user projects.
156 */
157extern int dump_task_regs(struct task_struct *, elf_gregset_t *);
158#define ELF_CORE_COPY_TASK_REGS(tsk, elf_regs) dump_task_regs(tsk, elf_regs)
159
160/* This yields a mask that user programs can use to figure out what
161   instruction set this cpu supports. */
162
163#define ELF_HWCAP (0)
164
165/* This yields a string that ld.so will use to load implementation
166   specific libraries for optimization. This is more specific in
167   intent than poking at uname or /proc/cpuinfo. */
168
169#define ELF_PLATFORM (NULL)
170
171#define SET_PERSONALITY(ex, ibcs2) set_personality((ibcs2)?PER_SVR4:PER_LINUX)
172
173#endif /* _ASM_UBICOM32_ELF_H */
174

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