1 /* Native support for the SGI Iris running IRIX version 4, for GDB.
2 Copyright 1988, 1989, 1990, 1991, 1992, 1993, 1995
3 Free Software Foundation, Inc.
4 Contributed by Alessandro Forin(af@cs.cmu.edu) at CMU
5 and by Per Bothner(bothner@cs.wisc.edu) at U.Wisconsin.
6 Implemented for Irix 4.x by Garrett A. Wollman.
8 This file is part of GDB.
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 2 of the License, or
13 (at your option) any later version.
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
20 You should have received a copy of the GNU General Public License
21 along with this program; if not, write to the Free Software
22 Foundation, Inc., 59 Temple Place - Suite 330,
23 Boston, MA 02111-1307, USA. */
30 #include <sys/procfs.h>
31 #include <setjmp.h> /* For JB_XXX. */
33 /* Prototypes for supply_gregset etc. */
36 /* Size of elements in jmpbuf */
38 #define JB_ELEMENT_SIZE 4
40 typedef unsigned int greg_t
; /* why isn't this defined? */
42 static void fetch_core_registers (char *, unsigned int, int, CORE_ADDR
);
45 * See the comment in m68k-tdep.c regarding the utility of these functions.
49 supply_gregset (gregsetp
)
53 register greg_t
*regp
= (greg_t
*) (gregsetp
->gp_regs
);
54 static char zerobuf
[MAX_REGISTER_RAW_SIZE
] =
57 /* FIXME: somewhere, there should be a #define for the meaning
58 of this magic number 32; we should use that. */
59 for (regi
= 0; regi
< 32; regi
++)
60 supply_register (regi
, (char *) (regp
+ regi
));
62 supply_register (PC_REGNUM
, (char *) &(gregsetp
->gp_pc
));
63 supply_register (HI_REGNUM
, (char *) &(gregsetp
->gp_mdhi
));
64 supply_register (LO_REGNUM
, (char *) &(gregsetp
->gp_mdlo
));
65 supply_register (CAUSE_REGNUM
, (char *) &(gregsetp
->gp_cause
));
67 /* Fill inaccessible registers with zero. */
68 supply_register (BADVADDR_REGNUM
, zerobuf
);
72 fill_gregset (gregsetp
, regno
)
77 register greg_t
*regp
= (greg_t
*) (gregsetp
->gp_regs
);
79 /* same FIXME as above wrt 32 */
80 for (regi
= 0; regi
< 32; regi
++)
81 if ((regno
== -1) || (regno
== regi
))
82 *(regp
+ regi
) = *(greg_t
*) & registers
[REGISTER_BYTE (regi
)];
84 if ((regno
== -1) || (regno
== PC_REGNUM
))
85 gregsetp
->gp_pc
= *(greg_t
*) & registers
[REGISTER_BYTE (PC_REGNUM
)];
87 if ((regno
== -1) || (regno
== CAUSE_REGNUM
))
88 gregsetp
->gp_cause
= *(greg_t
*) & registers
[REGISTER_BYTE (CAUSE_REGNUM
)];
90 if ((regno
== -1) || (regno
== HI_REGNUM
))
91 gregsetp
->gp_mdhi
= *(greg_t
*) & registers
[REGISTER_BYTE (HI_REGNUM
)];
93 if ((regno
== -1) || (regno
== LO_REGNUM
))
94 gregsetp
->gp_mdlo
= *(greg_t
*) & registers
[REGISTER_BYTE (LO_REGNUM
)];
98 * Now we do the same thing for floating-point registers.
99 * We don't bother to condition on FP0_REGNUM since any
100 * reasonable MIPS configuration has an R3010 in it.
102 * Again, see the comments in m68k-tdep.c.
106 supply_fpregset (fpregsetp
)
107 fpregset_t
*fpregsetp
;
110 static char zerobuf
[MAX_REGISTER_RAW_SIZE
] =
113 for (regi
= 0; regi
< 32; regi
++)
114 supply_register (FP0_REGNUM
+ regi
,
115 (char *) &fpregsetp
->fp_r
.fp_regs
[regi
]);
117 supply_register (FCRCS_REGNUM
, (char *) &fpregsetp
->fp_csr
);
119 /* FIXME: how can we supply FCRIR_REGNUM? SGI doesn't tell us. */
120 supply_register (FCRIR_REGNUM
, zerobuf
);
124 fill_fpregset (fpregsetp
, regno
)
125 fpregset_t
*fpregsetp
;
131 for (regi
= FP0_REGNUM
; regi
< FP0_REGNUM
+ 32; regi
++)
133 if ((regno
== -1) || (regno
== regi
))
135 from
= (char *) ®isters
[REGISTER_BYTE (regi
)];
136 to
= (char *) &(fpregsetp
->fp_r
.fp_regs
[regi
- FP0_REGNUM
]);
137 memcpy (to
, from
, REGISTER_RAW_SIZE (regi
));
141 if ((regno
== -1) || (regno
== FCRCS_REGNUM
))
142 fpregsetp
->fp_csr
= *(unsigned *) ®isters
[REGISTER_BYTE (FCRCS_REGNUM
)];
146 /* Figure out where the longjmp will land.
147 We expect the first arg to be a pointer to the jmp_buf structure from which
148 we extract the pc (JB_PC) that we will land at. The pc is copied into PC.
149 This routine returns true on success. */
152 get_longjmp_target (pc
)
155 char buf
[TARGET_PTR_BIT
/ TARGET_CHAR_BIT
];
158 jb_addr
= read_register (A0_REGNUM
);
160 if (target_read_memory (jb_addr
+ JB_PC
* JB_ELEMENT_SIZE
, buf
,
161 TARGET_PTR_BIT
/ TARGET_CHAR_BIT
))
164 *pc
= extract_address (buf
, TARGET_PTR_BIT
/ TARGET_CHAR_BIT
);
170 fetch_core_registers (core_reg_sect
, core_reg_size
, which
, reg_addr
)
172 unsigned core_reg_size
;
173 int which
; /* Unused */
174 CORE_ADDR reg_addr
; /* Unused */
176 if (core_reg_size
!= REGISTER_BYTES
)
178 warning ("wrong size gregset struct in core file");
182 memcpy ((char *) registers
, core_reg_sect
, core_reg_size
);
186 /* Register that we are able to handle irix4 core file formats.
187 FIXME: is this really bfd_target_unknown_flavour? */
189 static struct core_fns irix4_core_fns
=
191 bfd_target_unknown_flavour
, /* core_flavour */
192 default_check_format
, /* check_format */
193 default_core_sniffer
, /* core_sniffer */
194 fetch_core_registers
, /* core_read_registers */
199 _initialize_core_irix4 ()
201 add_core_fns (&irix4_core_fns
);