alpha.h revision 296373 
1/* ALPHA ELF support for BFD.
2   Copyright 1996, 1998, 2000, 2001, 2002 Free Software Foundation, Inc.
3
4   By Eric Youngdale, <eric@aib.com>.  No processor supplement available
5   for this platform.
6
7This file is part of BFD, the Binary File Descriptor library.
8
9This program is free software; you can redistribute it and/or modify
10it under the terms of the GNU General Public License as published by
11the Free Software Foundation; either version 2 of the License, or
12(at your option) any later version.
13
14This program is distributed in the hope that it will be useful,
15but WITHOUT ANY WARRANTY; without even the implied warranty of
16MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17GNU General Public License for more details.
18
19You should have received a copy of the GNU General Public License
20along with this program; if not, write to the Free Software
21Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.  */
22
23/* This file holds definitions specific to the ALPHA ELF ABI.  Note
24   that most of this is not actually implemented by BFD.  */
25
26#ifndef _ELF_ALPHA_H
27#define _ELF_ALPHA_H
28
29/* Processor specific flags for the ELF header e_flags field.  */
30
31/* All addresses must be below 2GB.  */
32#define EF_ALPHA_32BIT		0x00000001
33
34/* All relocations needed for relaxation with code movement are present.  */
35#define EF_ALPHA_CANRELAX	0x00000002
36
37/* Processor specific section flags.  */
38
39/* This section must be in the global data area.  */
40#define SHF_ALPHA_GPREL		0x10000000
41
42/* Section contains some sort of debugging information.  The exact
43   format is unspecified.  It's probably ECOFF symbols.  */
44#define SHT_ALPHA_DEBUG		0x70000001
45
46/* Section contains register usage information.  */
47#define SHT_ALPHA_REGINFO	0x70000002
48
49/* A section of type SHT_MIPS_REGINFO contains the following
50   structure.  */
51typedef struct
52{
53  /* Mask of general purpose registers used.  */
54  unsigned long ri_gprmask;
55  /* Mask of co-processor registers used.  */
56  unsigned long ri_cprmask[4];
57  /* GP register value for this object file.  */
58  long ri_gp_value;
59} Elf64_RegInfo;
60
61/* Special values for the st_other field in the symbol table.  */
62
63#define STO_ALPHA_NOPV		0x80
64#define STO_ALPHA_STD_GPLOAD	0x88
65
66/* Special values for Elf64_Dyn tag.  */
67#define DT_ALPHA_PLTRO		DT_LOPROC
68
69#include "elf/reloc-macros.h"
70
71/* Alpha relocs.  */
72START_RELOC_NUMBERS (elf_alpha_reloc_type)
73  RELOC_NUMBER (R_ALPHA_NONE, 0)	/* No reloc */
74  RELOC_NUMBER (R_ALPHA_REFLONG, 1)	/* Direct 32 bit */
75  RELOC_NUMBER (R_ALPHA_REFQUAD, 2)	/* Direct 64 bit */
76  RELOC_NUMBER (R_ALPHA_GPREL32, 3)	/* GP relative 32 bit */
77  RELOC_NUMBER (R_ALPHA_LITERAL, 4)	/* GP relative 16 bit w/optimization */
78  RELOC_NUMBER (R_ALPHA_LITUSE, 5)	/* Optimization hint for LITERAL */
79  RELOC_NUMBER (R_ALPHA_GPDISP, 6)	/* Add displacement to GP */
80  RELOC_NUMBER (R_ALPHA_BRADDR, 7)	/* PC+4 relative 23 bit shifted */
81  RELOC_NUMBER (R_ALPHA_HINT, 8)	/* PC+4 relative 16 bit shifted */
82  RELOC_NUMBER (R_ALPHA_SREL16, 9)	/* PC relative 16 bit */
83  RELOC_NUMBER (R_ALPHA_SREL32, 10)	/* PC relative 32 bit */
84  RELOC_NUMBER (R_ALPHA_SREL64, 11)	/* PC relative 64 bit */
85
86  /* Skip 12 - 16; deprecated ECOFF relocs.  */
87
88  RELOC_NUMBER (R_ALPHA_GPRELHIGH, 17)	/* GP relative 32 bit, high 16 bits */
89  RELOC_NUMBER (R_ALPHA_GPRELLOW, 18)	/* GP relative 32 bit, low 16 bits */
90  RELOC_NUMBER (R_ALPHA_GPREL16, 19)	/* GP relative 16 bit */
91
92  /* Skip 20 - 23; deprecated ECOFF relocs.  */
93
94  /* These relocations are specific to shared libraries.  */
95  RELOC_NUMBER (R_ALPHA_COPY, 24)	/* Copy symbol at runtime */
96  RELOC_NUMBER (R_ALPHA_GLOB_DAT, 25)	/* Create GOT entry */
97  RELOC_NUMBER (R_ALPHA_JMP_SLOT, 26)	/* Create PLT entry */
98  RELOC_NUMBER (R_ALPHA_RELATIVE, 27)	/* Adjust by program base */
99
100  /* Like BRADDR, but assert that the source and target object file
101     share the same GP value, and adjust the target address for
102     STO_ALPHA_STD_GPLOAD.  */
103  RELOC_NUMBER (R_ALPHA_BRSGP, 28)
104
105  /* Thread-Local Storage.  */
106  RELOC_NUMBER (R_ALPHA_TLSGD, 29)
107  RELOC_NUMBER (R_ALPHA_TLSLDM, 30)
108  RELOC_NUMBER (R_ALPHA_DTPMOD64, 31)
109  RELOC_NUMBER (R_ALPHA_GOTDTPREL, 32)
110  RELOC_NUMBER (R_ALPHA_DTPREL64, 33)
111  RELOC_NUMBER (R_ALPHA_DTPRELHI, 34)
112  RELOC_NUMBER (R_ALPHA_DTPRELLO, 35)
113  RELOC_NUMBER (R_ALPHA_DTPREL16, 36)
114  RELOC_NUMBER (R_ALPHA_GOTTPREL, 37)
115  RELOC_NUMBER (R_ALPHA_TPREL64, 38)
116  RELOC_NUMBER (R_ALPHA_TPRELHI, 39)
117  RELOC_NUMBER (R_ALPHA_TPRELLO, 40)
118  RELOC_NUMBER (R_ALPHA_TPREL16, 41)
119
120END_RELOC_NUMBERS (R_ALPHA_max)
121
122#define LITUSE_ALPHA_ADDR	0
123#define LITUSE_ALPHA_BASE	1
124#define LITUSE_ALPHA_BYTOFF	2
125#define LITUSE_ALPHA_JSR	3
126#define LITUSE_ALPHA_TLSGD	4
127#define LITUSE_ALPHA_TLSLDM	5
128#define LITUSE_ALPHA_JSRDIRECT	6
129
130#endif /* _ELF_ALPHA_H */
131