108 lines
4.3 KiB
C
108 lines
4.3 KiB
C
/* Common target dependent code for GDB on Alpha systems.
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Copyright 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2002 Free
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Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#ifndef ALPHA_TDEP_H
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#define ALPHA_TDEP_H
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/* Say how long (ordinary) registers are. This is a piece of bogosity
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used in push_word and a few other places; REGISTER_RAW_SIZE is the
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real way to know how big a register is. */
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#define ALPHA_REGISTER_SIZE 8
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/* Number of machine registers. */
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#define ALPHA_NUM_REGS 66
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/* Total amount of space needed to store our copies of the machine's
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register state. */
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#define ALPHA_REGISTER_BYTES (ALPHA_NUM_REGS * 8)
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/* Largest value REGISTER_RAW_SIZE can have. */
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#define ALPHA_MAX_REGISTER_RAW_SIZE 8
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/* Largest value REGISTER_VIRTUAL_SIZE can have. */
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#define ALPHA_MAX_REGISTER_VIRTUAL_SIZE 8
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/* Register numbers of various important registers.
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Note that most of these values are "real" register numbers,
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and correspond to the general registers of the machine,
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and FP_REGNUM is a "phony" register number which is too large
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to be an actual register number as far as the user is concerned
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but serves to get the desired value when passed to read_register. */
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#define ALPHA_V0_REGNUM 0 /* Function integer return value */
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#define ALPHA_T7_REGNUM 8 /* Return address register for OSF/1 __add* */
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#define ALPHA_GCC_FP_REGNUM 15 /* Used by gcc as frame register */
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#define ALPHA_A0_REGNUM 16 /* Loc of first arg during a subr call */
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#define ALPHA_T9_REGNUM 23 /* Return address register for OSF/1 __div* */
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#define ALPHA_T12_REGNUM 27 /* Contains start addr of current proc */
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#define ALPHA_SP_REGNUM 30 /* Contains address of top of stack */
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#define ALPHA_RA_REGNUM 26 /* Contains return address value */
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#define ALPHA_ZERO_REGNUM 31 /* Read-only register, always 0 */
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#define ALPHA_FP0_REGNUM 32 /* Floating point register 0 */
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#define ALPHA_FPA0_REGNUM 48 /* First float arg during a subr call */
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#define ALPHA_FPCR_REGNUM 63 /* Floating point control register */
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#define ALPHA_PC_REGNUM 64 /* Contains program counter */
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#define ALPHA_FP_REGNUM 65 /* Virtual frame pointer */
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/* The alpha has two different virtual pointers for arguments and locals.
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The virtual argument pointer is pointing to the bottom of the argument
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transfer area, which is located immediately below the virtual frame
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pointer. Its size is fixed for the native compiler, it is either zero
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(for the no arguments case) or large enough to hold all argument registers.
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gcc uses a variable sized argument transfer area. As it has
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to stay compatible with the native debugging tools it has to use the same
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virtual argument pointer and adjust the argument offsets accordingly.
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The virtual local pointer is localoff bytes below the virtual frame
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pointer, the value of localoff is obtained from the PDR. */
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#define ALPHA_NUM_ARG_REGS 6
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/* ABI variants that we know about. If you add to this enum, please
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update the table of names in alpha-tdep.c. */
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enum alpha_abi
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{
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ALPHA_ABI_UNKNOWN = 0,
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ALPHA_ABI_OSF1,
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ALPHA_ABI_LINUX,
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ALPHA_ABI_FREEBSD,
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ALPHA_ABI_NETBSD,
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ALPHA_ABI_INVALID /* Keep this last. */
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};
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/* Target-dependent structure in gdbarch. */
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struct gdbarch_tdep
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{
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enum alpha_abi alpha_abi; /* OS/ABI of inferior. */
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const char *abi_name; /* Name of the above. */
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CORE_ADDR vm_min_address; /* used by heuristic_proc_start */
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};
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void alpha_software_single_step (enum target_signal, int);
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void alpha_gdbarch_register_os_abi (enum alpha_abi,
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void (*init_abi)(struct gdbarch_info,
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struct gdbarch *));
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#endif /* ALPHA_TDEP_H */
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