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David Howellsb920de12008-02-08 04:19:31 -08001/* MN10300 ELF constant and register definitions
2 *
3 * Copyright (C) 2007 Matsushita Electric Industrial Co., Ltd.
4 * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
5 * Written by David Howells (dhowells@redhat.com)
6 *
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public Licence
9 * as published by the Free Software Foundation; either version
10 * 2 of the Licence, or (at your option) any later version.
11 */
12#ifndef _ASM_ELF_H
13#define _ASM_ELF_H
14
15#include <linux/utsname.h>
16#include <asm/ptrace.h>
17#include <asm/user.h>
18
19/*
20 * AM33 relocations
21 */
22#define R_MN10300_NONE 0 /* No reloc. */
23#define R_MN10300_32 1 /* Direct 32 bit. */
24#define R_MN10300_16 2 /* Direct 16 bit. */
25#define R_MN10300_8 3 /* Direct 8 bit. */
26#define R_MN10300_PCREL32 4 /* PC-relative 32-bit. */
27#define R_MN10300_PCREL16 5 /* PC-relative 16-bit signed. */
28#define R_MN10300_PCREL8 6 /* PC-relative 8-bit signed. */
29#define R_MN10300_24 9 /* Direct 24 bit. */
30#define R_MN10300_RELATIVE 23 /* Adjust by program base. */
31
32/*
33 * ELF register definitions..
34 */
35typedef unsigned long elf_greg_t;
36
37#define ELF_NGREG (sizeof (struct pt_regs) / sizeof(elf_greg_t))
38typedef elf_greg_t elf_gregset_t[ELF_NGREG];
39
40#define ELF_NFPREG 32
41typedef float elf_fpreg_t;
42
43typedef struct {
44 elf_fpreg_t fpregs[ELF_NFPREG];
45 u_int32_t fpcr;
46} elf_fpregset_t;
47
48extern int dump_fpu(struct pt_regs *, elf_fpregset_t *);
49
50/*
51 * This is used to ensure we don't load something for the wrong architecture
52 */
53#define elf_check_arch(x) \
54 (((x)->e_machine == EM_CYGNUS_MN10300) || \
55 ((x)->e_machine == EM_MN10300))
56
57/*
58 * These are used to set parameters in the core dumps.
59 */
60#define ELF_CLASS ELFCLASS32
61#define ELF_DATA ELFDATA2LSB
62#define ELF_ARCH EM_MN10300
63
64/*
65 * ELF process initialiser
66 */
67#define ELF_PLAT_INIT(_r, load_addr) \
68do { \
69 struct pt_regs *_ur = current->thread.uregs; \
70 _ur->a3 = 0; _ur->a2 = 0; _ur->d3 = 0; _ur->d2 = 0; \
71 _ur->mcvf = 0; _ur->mcrl = 0; _ur->mcrh = 0; _ur->mdrq = 0; \
72 _ur->e1 = 0; _ur->e0 = 0; _ur->e7 = 0; _ur->e6 = 0; \
73 _ur->e5 = 0; _ur->e4 = 0; _ur->e3 = 0; _ur->e2 = 0; \
74 _ur->lar = 0; _ur->lir = 0; _ur->mdr = 0; \
75 _ur->a1 = 0; _ur->a0 = 0; _ur->d1 = 0; _ur->d0 = 0; \
76} while (0)
77
78#define USE_ELF_CORE_DUMP
79#define ELF_EXEC_PAGESIZE 4096
80
81/*
82 * This is the location that an ET_DYN program is loaded if exec'ed. Typical
83 * use of this is to invoke "./ld.so someprog" to test out a new version of
84 * the loader. We need to make sure that it is out of the way of the program
85 * that it will "exec", and that there is sufficient room for the brk.
86 * - must clear the VMALLOC area
87 */
88#define ELF_ET_DYN_BASE 0x04000000
89
90/*
91 * regs is struct pt_regs, pr_reg is elf_gregset_t (which is
92 * now struct user_regs, they are different)
93 * - ELF_CORE_COPY_REGS has been guessed, and may be wrong
94 */
95#define ELF_CORE_COPY_REGS(pr_reg, regs) \
96do { \
97 pr_reg[0] = regs->a3; \
98 pr_reg[1] = regs->a2; \
99 pr_reg[2] = regs->d3; \
100 pr_reg[3] = regs->d2; \
101 pr_reg[4] = regs->mcvf; \
102 pr_reg[5] = regs->mcrl; \
103 pr_reg[6] = regs->mcrh; \
104 pr_reg[7] = regs->mdrq; \
105 pr_reg[8] = regs->e1; \
106 pr_reg[9] = regs->e0; \
107 pr_reg[10] = regs->e7; \
108 pr_reg[11] = regs->e6; \
109 pr_reg[12] = regs->e5; \
110 pr_reg[13] = regs->e4; \
111 pr_reg[14] = regs->e3; \
112 pr_reg[15] = regs->e2; \
113 pr_reg[16] = regs->sp; \
114 pr_reg[17] = regs->lar; \
115 pr_reg[18] = regs->lir; \
116 pr_reg[19] = regs->mdr; \
117 pr_reg[20] = regs->a1; \
118 pr_reg[21] = regs->a0; \
119 pr_reg[22] = regs->d1; \
120 pr_reg[23] = regs->d0; \
121 pr_reg[24] = regs->orig_d0; \
122 pr_reg[25] = regs->epsw; \
123 pr_reg[26] = regs->pc; \
124} while (0);
125
126/*
127 * This yields a mask that user programs can use to figure out what
128 * instruction set this CPU supports. This could be done in user space,
129 * but it's not easy, and we've already done it here.
130 */
131#define ELF_HWCAP (0)
132
133/*
134 * This yields a string that ld.so will use to load implementation
135 * specific libraries for optimization. This is more specific in
136 * intent than poking at uname or /proc/cpuinfo.
137 *
138 * For the moment, we have only optimizations for the Intel generations,
139 * but that could change...
140 */
141#define ELF_PLATFORM (NULL)
142
143#ifdef __KERNEL__
144#define SET_PERSONALITY(ex, ibcs2) set_personality(PER_LINUX)
145#endif
146
147#endif /* _ASM_ELF_H */