fe2716e002962599aedb66fd197f95081c0b8348
1 /* Common target dependent code for GDB on Alpha systems.
2 Copyright 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2002 Free
3 Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
25 /* Say how long (ordinary) registers are. This is a piece of bogosity
26 used in push_word and a few other places; REGISTER_RAW_SIZE is the
27 real way to know how big a register is. */
28 #define ALPHA_REGISTER_SIZE 8
30 /* Number of machine registers. */
31 #define ALPHA_NUM_REGS 66
33 /* Total amount of space needed to store our copies of the machine's
35 #define ALPHA_REGISTER_BYTES (ALPHA_NUM_REGS * 8)
37 /* Largest value REGISTER_RAW_SIZE can have. */
38 #define ALPHA_MAX_REGISTER_RAW_SIZE 8
40 /* Largest value REGISTER_VIRTUAL_SIZE can have. */
41 #define ALPHA_MAX_REGISTER_VIRTUAL_SIZE 8
43 /* Register numbers of various important registers.
44 Note that most of these values are "real" register numbers,
45 and correspond to the general registers of the machine,
46 and FP_REGNUM is a "phony" register number which is too large
47 to be an actual register number as far as the user is concerned
48 but serves to get the desired value when passed to read_register. */
50 #define ALPHA_V0_REGNUM 0 /* Function integer return value */
51 #define ALPHA_T7_REGNUM 8 /* Return address register for OSF/1 __add* */
52 #define ALPHA_GCC_FP_REGNUM 15 /* Used by gcc as frame register */
53 #define ALPHA_A0_REGNUM 16 /* Loc of first arg during a subr call */
54 #define ALPHA_T9_REGNUM 23 /* Return address register for OSF/1 __div* */
55 #define ALPHA_T12_REGNUM 27 /* Contains start addr of current proc */
56 #define ALPHA_SP_REGNUM 30 /* Contains address of top of stack */
57 #define ALPHA_RA_REGNUM 26 /* Contains return address value */
58 #define ALPHA_ZERO_REGNUM 31 /* Read-only register, always 0 */
59 #define ALPHA_FP0_REGNUM 32 /* Floating point register 0 */
60 #define ALPHA_FPA0_REGNUM 48 /* First float arg during a subr call */
61 #define ALPHA_FPCR_REGNUM 63 /* Floating point control register */
62 #define ALPHA_PC_REGNUM 64 /* Contains program counter */
63 #define ALPHA_FP_REGNUM 65 /* Virtual frame pointer */
65 /* The alpha has two different virtual pointers for arguments and locals.
67 The virtual argument pointer is pointing to the bottom of the argument
68 transfer area, which is located immediately below the virtual frame
69 pointer. Its size is fixed for the native compiler, it is either zero
70 (for the no arguments case) or large enough to hold all argument registers.
71 gcc uses a variable sized argument transfer area. As it has
72 to stay compatible with the native debugging tools it has to use the same
73 virtual argument pointer and adjust the argument offsets accordingly.
75 The virtual local pointer is localoff bytes below the virtual frame
76 pointer, the value of localoff is obtained from the PDR. */
77 #define ALPHA_NUM_ARG_REGS 6
79 /* ABI variants that we know about. If you add to this enum, please
80 update the table of names in alpha-tdep.c. */
83 ALPHA_ABI_UNKNOWN
= 0,
89 ALPHA_ABI_INVALID
/* Keep this last. */
92 /* Target-dependent structure in gdbarch. */
95 enum alpha_abi alpha_abi
; /* OS/ABI of inferior. */
96 const char *abi_name
; /* Name of the above. */
99 #endif /* ALPHA_TDEP_H */