| /* Definitions to make GDB run on a mips box under 4.3bsd. |
| |
| Copyright 1986, 1987, 1989, 1991, 1992, 1993, 1994, 1995, 1996, |
| 1997, 1998, 1999, 2000, 2002, 2003 Free Software Foundation, Inc. |
| |
| Contributed by Per Bothner (bothner@cs.wisc.edu) at U.Wisconsin |
| and by Alessandro Forin (af@cs.cmu.edu) at CMU.. |
| |
| 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 TM_MIPS_H |
| #define TM_MIPS_H 1 |
| |
| #define GDB_MULTI_ARCH 1 |
| |
| #include "regcache.h" |
| |
| struct frame_info; |
| struct symbol; |
| struct type; |
| struct value; |
| |
| #include <bfd.h> |
| #include "coff/sym.h" /* Needed for PDR below. */ |
| #include "coff/symconst.h" |
| |
| /* Return non-zero if PC points to an instruction which will cause a step |
| to execute both the instruction at PC and an instruction at PC+4. */ |
| extern int mips_step_skips_delay (CORE_ADDR); |
| #define STEP_SKIPS_DELAY_P (1) |
| #define STEP_SKIPS_DELAY(pc) (mips_step_skips_delay (pc)) |
| |
| /* Register numbers of various important registers. |
| Note that some of these values are "real" register numbers, |
| and correspond to the general registers of the machine, |
| and some are "phony" register numbers which are too large |
| to be actual register numbers as far as the user is concerned |
| but do serve to get the desired values when passed to read_register. */ |
| |
| #define ZERO_REGNUM 0 /* read-only register, always 0 */ |
| #define V0_REGNUM 2 /* Function integer return value */ |
| #define A0_REGNUM 4 /* Loc of first arg during a subr call */ |
| #define T9_REGNUM 25 /* Contains address of callee in PIC */ |
| #define SP_REGNUM 29 /* Contains address of top of stack */ |
| #define RA_REGNUM 31 /* Contains return address value */ |
| #define PS_REGNUM 32 /* Contains processor status */ |
| #define UNUSED_REGNUM 73 /* Never used, FIXME */ |
| #define FIRST_EMBED_REGNUM 74 /* First CP0 register for embedded use */ |
| #define PRID_REGNUM 89 /* Processor ID */ |
| #define LAST_EMBED_REGNUM 89 /* Last one */ |
| |
| /* Special symbol found in blocks associated with routines. We can hang |
| mips_extra_func_info_t's off of this. */ |
| |
| #define MIPS_EFI_SYMBOL_NAME "__GDB_EFI_INFO__" |
| extern void ecoff_relocate_efi (struct symbol *, CORE_ADDR); |
| |
| /* Specific information about a procedure. |
| This overlays the MIPS's PDR records, |
| mipsread.c (ab)uses this to save memory */ |
| |
| typedef struct mips_extra_func_info |
| { |
| long numargs; /* number of args to procedure (was iopt) */ |
| bfd_vma high_addr; /* upper address bound */ |
| long frame_adjust; /* offset of FP from SP (used on MIPS16) */ |
| PDR pdr; /* Procedure descriptor record */ |
| } |
| *mips_extra_func_info_t; |
| |
| /* It takes two values to specify a frame on the MIPS. |
| |
| In fact, the *PC* is the primary value that sets up a frame. The |
| PC is looked up to see what function it's in; symbol information |
| from that function tells us which register is the frame pointer |
| base, and what offset from there is the "virtual frame pointer". |
| (This is usually an offset from SP.) On most non-MIPS machines, |
| the primary value is the SP, and the PC, if needed, disambiguates |
| multiple functions with the same SP. But on the MIPS we can't do |
| that since the PC is not stored in the same part of the frame every |
| time. This does not seem to be a very clever way to set up frames, |
| but there is nothing we can do about that. */ |
| |
| #define SETUP_ARBITRARY_FRAME(argc, argv) setup_arbitrary_frame (argc, argv) |
| extern struct frame_info *setup_arbitrary_frame (int, CORE_ADDR *); |
| |
| /* Functions for dealing with MIPS16 call and return stubs. */ |
| #define IGNORE_HELPER_CALL(pc) mips_ignore_helper (pc) |
| extern int mips_ignore_helper (CORE_ADDR pc); |
| |
| /* Definitions and declarations used by mips-tdep.c and remote-mips.c */ |
| #define MIPS_INSTLEN 4 /* Length of an instruction */ |
| #define MIPS16_INSTLEN 2 /* Length of an instruction on MIPS16 */ |
| #define MIPS_NUMREGS 32 /* Number of integer or float registers */ |
| typedef unsigned long t_inst; /* Integer big enough to hold an instruction */ |
| |
| #endif /* TM_MIPS_H */ |
| |
| /* Single step based on where the current instruction will take us. */ |
| extern void mips_software_single_step (enum target_signal, int); |