1130803Smarcel/* Common target dependent code for GDB on Alpha systems. 2130803Smarcel Copyright 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2002, 2003 Free 3130803Smarcel Software Foundation, Inc. 4130803Smarcel 5130803Smarcel This file is part of GDB. 6130803Smarcel 7130803Smarcel This program is free software; you can redistribute it and/or modify 8130803Smarcel it under the terms of the GNU General Public License as published by 9130803Smarcel the Free Software Foundation; either version 2 of the License, or 10130803Smarcel (at your option) any later version. 11130803Smarcel 12130803Smarcel This program is distributed in the hope that it will be useful, 13130803Smarcel but WITHOUT ANY WARRANTY; without even the implied warranty of 14130803Smarcel MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15130803Smarcel GNU General Public License for more details. 16130803Smarcel 17130803Smarcel You should have received a copy of the GNU General Public License 18130803Smarcel along with this program; if not, write to the Free Software 19130803Smarcel Foundation, Inc., 59 Temple Place - Suite 330, 20130803Smarcel Boston, MA 02111-1307, USA. */ 21130803Smarcel 22130803Smarcel#ifndef ALPHA_TDEP_H 23130803Smarcel#define ALPHA_TDEP_H 24130803Smarcel 25130803Smarcel/* Say how long (ordinary) registers are. This is a piece of bogosity 26130803Smarcel used in push_word and a few other places; 27130803Smarcel DEPRECATED_REGISTER_RAW_SIZE is the real way to know how big a 28130803Smarcel register is. */ 29130803Smarcel#define ALPHA_REGISTER_SIZE 8 30130803Smarcel 31130803Smarcel/* Number of machine registers. */ 32130803Smarcel#define ALPHA_NUM_REGS 67 33130803Smarcel 34130803Smarcel/* Total amount of space needed to store our copies of the machine's 35130803Smarcel register state. */ 36130803Smarcel#define ALPHA_REGISTER_BYTES (ALPHA_NUM_REGS * 8) 37130803Smarcel 38130803Smarcel/* Register numbers of various important registers. Note that most of 39130803Smarcel these values are "real" register numbers, and correspond to the 40130803Smarcel general registers of the machine. */ 41130803Smarcel 42130803Smarcel#define ALPHA_V0_REGNUM 0 /* Function integer return value */ 43130803Smarcel#define ALPHA_T7_REGNUM 8 /* Return address register for OSF/1 __add* */ 44130803Smarcel#define ALPHA_GCC_FP_REGNUM 15 /* Used by gcc as frame register */ 45130803Smarcel#define ALPHA_A0_REGNUM 16 /* Loc of first arg during a subr call */ 46130803Smarcel#define ALPHA_T9_REGNUM 23 /* Return address register for OSF/1 __div* */ 47130803Smarcel#define ALPHA_RA_REGNUM 26 /* Contains return address value */ 48130803Smarcel#define ALPHA_T12_REGNUM 27 /* Contains start addr of current proc */ 49130803Smarcel#define ALPHA_GP_REGNUM 29 /* Contains the global pointer */ 50130803Smarcel#define ALPHA_SP_REGNUM 30 /* Contains address of top of stack */ 51130803Smarcel#define ALPHA_ZERO_REGNUM 31 /* Read-only register, always 0 */ 52130803Smarcel#define ALPHA_FP0_REGNUM 32 /* Floating point register 0 */ 53130803Smarcel#define ALPHA_FPA0_REGNUM 48 /* First float arg during a subr call */ 54130803Smarcel#define ALPHA_FPCR_REGNUM 63 /* Floating point control register */ 55130803Smarcel#define ALPHA_PC_REGNUM 64 /* Contains program counter */ 56130803Smarcel#define ALPHA_UNIQUE_REGNUM 66 /* PAL_rduniq value */ 57130803Smarcel 58130803Smarcel/* The alpha has two different virtual pointers for arguments and locals. 59130803Smarcel 60130803Smarcel The virtual argument pointer is pointing to the bottom of the argument 61130803Smarcel transfer area, which is located immediately below the virtual frame 62130803Smarcel pointer. Its size is fixed for the native compiler, it is either zero 63130803Smarcel (for the no arguments case) or large enough to hold all argument registers. 64130803Smarcel gcc uses a variable sized argument transfer area. As it has 65130803Smarcel to stay compatible with the native debugging tools it has to use the same 66130803Smarcel virtual argument pointer and adjust the argument offsets accordingly. 67130803Smarcel 68130803Smarcel The virtual local pointer is localoff bytes below the virtual frame 69130803Smarcel pointer, the value of localoff is obtained from the PDR. */ 70130803Smarcel#define ALPHA_NUM_ARG_REGS 6 71130803Smarcel 72130803Smarcel/* Target-dependent structure in gdbarch. */ 73130803Smarcelstruct gdbarch_tdep 74130803Smarcel{ 75130803Smarcel CORE_ADDR vm_min_address; /* Used by alpha_heuristic_proc_start. */ 76130803Smarcel 77130803Smarcel /* If PC is inside a dynamically-generated signal trampoline function 78130803Smarcel (i.e. one copied onto the user stack at run-time), return how many 79130803Smarcel bytes PC is beyond the start of that function. Otherwise, return -1. */ 80130803Smarcel LONGEST (*dynamic_sigtramp_offset) (CORE_ADDR); 81130803Smarcel 82130803Smarcel /* Translate a signal handler stack base address into the address of 83130803Smarcel the sigcontext structure for that signal handler. */ 84130803Smarcel CORE_ADDR (*sigcontext_addr) (struct frame_info *); 85130803Smarcel 86130803Smarcel /* Offset of registers in `struct sigcontext'. */ 87130803Smarcel int sc_pc_offset; 88130803Smarcel int sc_regs_offset; 89130803Smarcel int sc_fpregs_offset; 90130803Smarcel 91130803Smarcel int jb_pc; /* Offset to PC value in jump buffer. 92130803Smarcel If htis is negative, longjmp support 93130803Smarcel will be disabled. */ 94130803Smarcel size_t jb_elt_size; /* And the size of each entry in the buf. */ 95130803Smarcel}; 96130803Smarcel 97130803Smarcelextern unsigned int alpha_read_insn (CORE_ADDR pc); 98130803Smarcelextern void alpha_software_single_step (enum target_signal, int); 99130803Smarcelextern CORE_ADDR alpha_after_prologue (CORE_ADDR pc); 100130803Smarcel 101130803Smarcelextern void alpha_mdebug_init_abi (struct gdbarch_info, struct gdbarch *); 102130803Smarcelextern void alpha_dwarf2_init_abi (struct gdbarch_info, struct gdbarch *); 103130803Smarcel 104130803Smarcelextern void alpha_supply_int_regs (int, const void *, const void *, 105130803Smarcel const void *); 106130803Smarcelextern void alpha_fill_int_regs (int, void *, void *, void *); 107130803Smarcelextern void alpha_supply_fp_regs (int, const void *, const void *); 108130803Smarcelextern void alpha_fill_fp_regs (int, void *, void *); 109130803Smarcel 110130803Smarcel#endif /* ALPHA_TDEP_H */ 111