- /* Common target dependent code for GDB on Alpha systems.
- Copyright (C) 1993-2015 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 3 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, see <http://www.gnu.org/licenses/>. */
- #ifndef ALPHA_TDEP_H
- #define ALPHA_TDEP_H
- struct regcache;
- /* Say how long (ordinary) registers are. This is a piece of bogosity
- used in push_word and a few other places; register_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 67
- /* 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. */
- #define ALPHA_V0_REGNUM 0 /* Function integer return value */
- #define ALPHA_T7_REGNUM 8 /* Return address register for OSF/1 __add* */
- #define ALPHA_S0_REGNUM 9 /* First saved register */
- #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_RA_REGNUM 26 /* Contains return address value */
- #define ALPHA_T12_REGNUM 27 /* Contains start addr of current proc */
- #define ALPHA_GP_REGNUM 29 /* Contains the global pointer */
- #define ALPHA_SP_REGNUM 30 /* Contains address of top of stack */
- #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_UNIQUE_REGNUM 66 /* PAL_rduniq value */
- /* Instruction size. */
- #define ALPHA_INSN_SIZE 4
- /* 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
- {
- CORE_ADDR vm_min_address; /* Used by alpha_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) (struct gdbarch *, CORE_ADDR);
- /* Translate a signal handler stack base address into the address of
- the sigcontext structure for that signal handler. */
- CORE_ADDR (*sigcontext_addr) (struct frame_info *);
- /* Does the PC fall in a signal trampoline. */
- /* NOTE: cagney/2004-04-30: Do not copy/clone this code. Instead
- look at tramp-frame.h and other simplier per-architecture
- sigtramp unwinders. */
- int (*pc_in_sigtramp) (struct gdbarch *gdbarch, CORE_ADDR pc,
- const char *name);
- /* If TYPE will be returned in memory, return true. */
- int (*return_in_memory) (struct type *type);
- /* Offset of registers in `struct sigcontext'. */
- int sc_pc_offset;
- int sc_regs_offset;
- int sc_fpregs_offset;
- 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. */
- };
- extern unsigned int alpha_read_insn (struct gdbarch *gdbarch, CORE_ADDR pc);
- extern int alpha_software_single_step (struct frame_info *frame);
- extern CORE_ADDR alpha_after_prologue (CORE_ADDR pc);
- extern void alpha_mdebug_init_abi (struct gdbarch_info, struct gdbarch *);
- extern void alpha_dwarf2_init_abi (struct gdbarch_info, struct gdbarch *);
- extern void alpha_supply_int_regs (struct regcache *, int, const void *,
- const void *, const void *);
- extern void alpha_fill_int_regs (const struct regcache *, int,
- void *, void *, void *);
- extern void alpha_supply_fp_regs (struct regcache *, int,
- const void *, const void *);
- extern void alpha_fill_fp_regs (const struct regcache *,
- int, void *, void *);
- #endif /* ALPHA_TDEP_H */