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c906108c | 1 | /* Definitions to make GDB run on a mips box under 4.3bsd. |
a094c6fb AC |
2 | |
3 | Copyright 1986, 1987, 1989, 1991, 1992, 1993, 1994, 1995, 1996, | |
95404a3e | 4 | 1997, 1998, 1999, 2000, 2002, 2003 Free Software Foundation, Inc. |
a094c6fb | 5 | |
c906108c SS |
6 | Contributed by Per Bothner (bothner@cs.wisc.edu) at U.Wisconsin |
7 | and by Alessandro Forin (af@cs.cmu.edu) at CMU.. | |
8 | ||
c5aa993b | 9 | This file is part of GDB. |
c906108c | 10 | |
c5aa993b JM |
11 | This program is free software; you can redistribute it and/or modify |
12 | it under the terms of the GNU General Public License as published by | |
13 | the Free Software Foundation; either version 2 of the License, or | |
14 | (at your option) any later version. | |
c906108c | 15 | |
c5aa993b JM |
16 | This program is distributed in the hope that it will be useful, |
17 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | GNU General Public License for more details. | |
c906108c | 20 | |
c5aa993b JM |
21 | You should have received a copy of the GNU General Public License |
22 | along with this program; if not, write to the Free Software | |
23 | Foundation, Inc., 59 Temple Place - Suite 330, | |
24 | Boston, MA 02111-1307, USA. */ | |
c906108c SS |
25 | |
26 | #ifndef TM_MIPS_H | |
27 | #define TM_MIPS_H 1 | |
28 | ||
bf64bfd6 AC |
29 | #define GDB_MULTI_ARCH 1 |
30 | ||
f88e2c52 AC |
31 | #include "regcache.h" |
32 | ||
c906108c SS |
33 | struct frame_info; |
34 | struct symbol; | |
35 | struct type; | |
36 | struct value; | |
c906108c SS |
37 | |
38 | #include <bfd.h> | |
39 | #include "coff/sym.h" /* Needed for PDR below. */ | |
40 | #include "coff/symconst.h" | |
41 | ||
c906108c SS |
42 | /* Return non-zero if PC points to an instruction which will cause a step |
43 | to execute both the instruction at PC and an instruction at PC+4. */ | |
a14ed312 | 44 | extern int mips_step_skips_delay (CORE_ADDR); |
c906108c SS |
45 | #define STEP_SKIPS_DELAY_P (1) |
46 | #define STEP_SKIPS_DELAY(pc) (mips_step_skips_delay (pc)) | |
47 | ||
c906108c SS |
48 | /* Register numbers of various important registers. |
49 | Note that some of these values are "real" register numbers, | |
50 | and correspond to the general registers of the machine, | |
51 | and some are "phony" register numbers which are too large | |
52 | to be actual register numbers as far as the user is concerned | |
53 | but do serve to get the desired values when passed to read_register. */ | |
54 | ||
55 | #define ZERO_REGNUM 0 /* read-only register, always 0 */ | |
56 | #define V0_REGNUM 2 /* Function integer return value */ | |
57 | #define A0_REGNUM 4 /* Loc of first arg during a subr call */ | |
c906108c SS |
58 | #define T9_REGNUM 25 /* Contains address of callee in PIC */ |
59 | #define SP_REGNUM 29 /* Contains address of top of stack */ | |
60 | #define RA_REGNUM 31 /* Contains return address value */ | |
61 | #define PS_REGNUM 32 /* Contains processor status */ | |
c906108c SS |
62 | #define UNUSED_REGNUM 73 /* Never used, FIXME */ |
63 | #define FIRST_EMBED_REGNUM 74 /* First CP0 register for embedded use */ | |
64 | #define PRID_REGNUM 89 /* Processor ID */ | |
65 | #define LAST_EMBED_REGNUM 89 /* Last one */ | |
66 | ||
c906108c SS |
67 | /* Special symbol found in blocks associated with routines. We can hang |
68 | mips_extra_func_info_t's off of this. */ | |
69 | ||
70 | #define MIPS_EFI_SYMBOL_NAME "__GDB_EFI_INFO__" | |
a14ed312 | 71 | extern void ecoff_relocate_efi (struct symbol *, CORE_ADDR); |
c906108c SS |
72 | |
73 | /* Specific information about a procedure. | |
74 | This overlays the MIPS's PDR records, | |
75 | mipsread.c (ab)uses this to save memory */ | |
76 | ||
c5aa993b JM |
77 | typedef struct mips_extra_func_info |
78 | { | |
79 | long numargs; /* number of args to procedure (was iopt) */ | |
80 | bfd_vma high_addr; /* upper address bound */ | |
81 | long frame_adjust; /* offset of FP from SP (used on MIPS16) */ | |
82 | PDR pdr; /* Procedure descriptor record */ | |
83 | } | |
84 | *mips_extra_func_info_t; | |
c906108c | 85 | |
c906108c SS |
86 | /* It takes two values to specify a frame on the MIPS. |
87 | ||
88 | In fact, the *PC* is the primary value that sets up a frame. The | |
89 | PC is looked up to see what function it's in; symbol information | |
90 | from that function tells us which register is the frame pointer | |
91 | base, and what offset from there is the "virtual frame pointer". | |
92 | (This is usually an offset from SP.) On most non-MIPS machines, | |
93 | the primary value is the SP, and the PC, if needed, disambiguates | |
94 | multiple functions with the same SP. But on the MIPS we can't do | |
95 | that since the PC is not stored in the same part of the frame every | |
96 | time. This does not seem to be a very clever way to set up frames, | |
7e73cedf | 97 | but there is nothing we can do about that. */ |
c906108c SS |
98 | |
99 | #define SETUP_ARBITRARY_FRAME(argc, argv) setup_arbitrary_frame (argc, argv) | |
a14ed312 | 100 | extern struct frame_info *setup_arbitrary_frame (int, CORE_ADDR *); |
c906108c | 101 | |
c906108c SS |
102 | /* These are defined in mdebugread.c and are used in mips-tdep.c */ |
103 | extern CORE_ADDR sigtramp_address, sigtramp_end; | |
a14ed312 | 104 | extern void fixup_sigtramp (void); |
c906108c | 105 | |
c906108c | 106 | /* Functions for dealing with MIPS16 call and return stubs. */ |
c906108c | 107 | #define IGNORE_HELPER_CALL(pc) mips_ignore_helper (pc) |
a14ed312 | 108 | extern int mips_ignore_helper (CORE_ADDR pc); |
c906108c | 109 | |
c906108c SS |
110 | /* Definitions and declarations used by mips-tdep.c and remote-mips.c */ |
111 | #define MIPS_INSTLEN 4 /* Length of an instruction */ | |
c5aa993b | 112 | #define MIPS16_INSTLEN 2 /* Length of an instruction on MIPS16 */ |
c906108c SS |
113 | #define MIPS_NUMREGS 32 /* Number of integer or float registers */ |
114 | typedef unsigned long t_inst; /* Integer big enough to hold an instruction */ | |
115 | ||
c5aa993b | 116 | #endif /* TM_MIPS_H */ |
c906108c | 117 | |
9022177c DJ |
118 | /* Single step based on where the current instruction will take us. */ |
119 | extern void mips_software_single_step (enum target_signal, int); |