| /* Common target dependent code for GDB on Alpha systems. |
| Copyright 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2002 Free |
| Software Foundation, Inc. |
| |
| This file is part of GDB. |
| |
| This program is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2 of the License, or |
| (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program; if not, write to the Free Software |
| Foundation, Inc., 59 Temple Place - Suite 330, |
| Boston, MA 02111-1307, USA. */ |
| |
| #ifndef ALPHA_TDEP_H |
| #define ALPHA_TDEP_H |
| |
| #include "osabi.h" |
| |
| /* Say how long (ordinary) registers are. This is a piece of bogosity |
| used in push_word and a few other places; REGISTER_RAW_SIZE is the |
| real way to know how big a register is. */ |
| #define ALPHA_REGISTER_SIZE 8 |
| |
| /* Number of machine registers. */ |
| #define ALPHA_NUM_REGS 66 |
| |
| /* Total amount of space needed to store our copies of the machine's |
| register state. */ |
| #define ALPHA_REGISTER_BYTES (ALPHA_NUM_REGS * 8) |
| |
| /* Largest value REGISTER_RAW_SIZE can have. */ |
| #define ALPHA_MAX_REGISTER_RAW_SIZE 8 |
| |
| /* Largest value REGISTER_VIRTUAL_SIZE can have. */ |
| #define ALPHA_MAX_REGISTER_VIRTUAL_SIZE 8 |
| |
| /* Register numbers of various important registers. |
| Note that most of these values are "real" register numbers, |
| and correspond to the general registers of the machine, |
| and FP_REGNUM is a "phony" register number which is too large |
| to be an actual register number as far as the user is concerned |
| but serves to get the desired value when passed to read_register. */ |
| |
| #define ALPHA_V0_REGNUM 0 /* Function integer return value */ |
| #define ALPHA_T7_REGNUM 8 /* Return address register for OSF/1 __add* */ |
| #define ALPHA_GCC_FP_REGNUM 15 /* Used by gcc as frame register */ |
| #define ALPHA_A0_REGNUM 16 /* Loc of first arg during a subr call */ |
| #define ALPHA_T9_REGNUM 23 /* Return address register for OSF/1 __div* */ |
| #define ALPHA_T12_REGNUM 27 /* Contains start addr of current proc */ |
| #define ALPHA_SP_REGNUM 30 /* Contains address of top of stack */ |
| #define ALPHA_RA_REGNUM 26 /* Contains return address value */ |
| #define ALPHA_ZERO_REGNUM 31 /* Read-only register, always 0 */ |
| #define ALPHA_FP0_REGNUM 32 /* Floating point register 0 */ |
| #define ALPHA_FPA0_REGNUM 48 /* First float arg during a subr call */ |
| #define ALPHA_FPCR_REGNUM 63 /* Floating point control register */ |
| #define ALPHA_PC_REGNUM 64 /* Contains program counter */ |
| #define ALPHA_FP_REGNUM 65 /* Virtual frame pointer */ |
| |
| /* The alpha has two different virtual pointers for arguments and locals. |
| |
| The virtual argument pointer is pointing to the bottom of the argument |
| transfer area, which is located immediately below the virtual frame |
| pointer. Its size is fixed for the native compiler, it is either zero |
| (for the no arguments case) or large enough to hold all argument registers. |
| gcc uses a variable sized argument transfer area. As it has |
| to stay compatible with the native debugging tools it has to use the same |
| virtual argument pointer and adjust the argument offsets accordingly. |
| |
| The virtual local pointer is localoff bytes below the virtual frame |
| pointer, the value of localoff is obtained from the PDR. */ |
| #define ALPHA_NUM_ARG_REGS 6 |
| |
| /* Target-dependent structure in gdbarch. */ |
| struct gdbarch_tdep |
| { |
| enum gdb_osabi osabi; /* OS/ABI of inferior. */ |
| |
| CORE_ADDR vm_min_address; /* used by heuristic_proc_start */ |
| |
| /* If PC is inside a dynamically-generated signal trampoline function |
| (i.e. one copied onto the user stack at run-time), return how many |
| bytes PC is beyond the start of that function. Otherwise, return -1. */ |
| LONGEST (*dynamic_sigtramp_offset) (CORE_ADDR); |
| |
| /* If FRAME refers to a sigtramp frame, return the address of the next |
| frame. */ |
| CORE_ADDR (*skip_sigtramp_frame) (struct frame_info *, CORE_ADDR); |
| |
| /* Translate a signal handler frame into the address of the sigcontext |
| structure for that signal handler. */ |
| CORE_ADDR (*sigcontext_addr) (struct frame_info *); |
| |
| int jb_pc; /* Offset to PC value in jump buffer. |
| If htis is negative, longjmp support |
| will be disabled. */ |
| size_t jb_elt_size; /* And the size of each entry in the buf. */ |
| }; |
| |
| void alpha_software_single_step (enum target_signal, int); |
| |
| #endif /* ALPHA_TDEP_H */ |