| /* Common target dependent code for GDB on Alpha systems. |
| Copyright (C) 1993-2021 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 simpler 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 std::vector<CORE_ADDR> alpha_software_single_step |
| (struct regcache *regcache); |
| 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 */ |