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 (gregset_t
*gregsetp
)
52 register greg_t
*regp
= (greg_t
*) (gregsetp
->gp_regs
);
53 static char zerobuf
[MAX_REGISTER_RAW_SIZE
] =
56 /* FIXME: somewhere, there should be a #define for the meaning
57 of this magic number 32; we should use that. */
58 for (regi
= 0; regi
< 32; regi
++)
59 supply_register (regi
, (char *) (regp
+ regi
));
61 supply_register (PC_REGNUM
, (char *) &(gregsetp
->gp_pc
));
62 supply_register (HI_REGNUM
, (char *) &(gregsetp
->gp_mdhi
));
63 supply_register (LO_REGNUM
, (char *) &(gregsetp
->gp_mdlo
));
64 supply_register (CAUSE_REGNUM
, (char *) &(gregsetp
->gp_cause
));
66 /* Fill inaccessible registers with zero. */
67 supply_register (BADVADDR_REGNUM
, zerobuf
);
71 fill_gregset (gregset_t
*gregsetp
, int regno
)
74 register greg_t
*regp
= (greg_t
*) (gregsetp
->gp_regs
);
76 /* same FIXME as above wrt 32 */
77 for (regi
= 0; regi
< 32; regi
++)
78 if ((regno
== -1) || (regno
== regi
))
79 *(regp
+ regi
) = *(greg_t
*) & registers
[REGISTER_BYTE (regi
)];
81 if ((regno
== -1) || (regno
== PC_REGNUM
))
82 gregsetp
->gp_pc
= *(greg_t
*) & registers
[REGISTER_BYTE (PC_REGNUM
)];
84 if ((regno
== -1) || (regno
== CAUSE_REGNUM
))
85 gregsetp
->gp_cause
= *(greg_t
*) & registers
[REGISTER_BYTE (CAUSE_REGNUM
)];
87 if ((regno
== -1) || (regno
== HI_REGNUM
))
88 gregsetp
->gp_mdhi
= *(greg_t
*) & registers
[REGISTER_BYTE (HI_REGNUM
)];
90 if ((regno
== -1) || (regno
== LO_REGNUM
))
91 gregsetp
->gp_mdlo
= *(greg_t
*) & registers
[REGISTER_BYTE (LO_REGNUM
)];
95 * Now we do the same thing for floating-point registers.
96 * We don't bother to condition on FP0_REGNUM since any
97 * reasonable MIPS configuration has an R3010 in it.
99 * Again, see the comments in m68k-tdep.c.
103 supply_fpregset (fpregset_t
*fpregsetp
)
106 static char zerobuf
[MAX_REGISTER_RAW_SIZE
] =
109 for (regi
= 0; regi
< 32; regi
++)
110 supply_register (FP0_REGNUM
+ regi
,
111 (char *) &fpregsetp
->fp_r
.fp_regs
[regi
]);
113 supply_register (FCRCS_REGNUM
, (char *) &fpregsetp
->fp_csr
);
115 /* FIXME: how can we supply FCRIR_REGNUM? SGI doesn't tell us. */
116 supply_register (FCRIR_REGNUM
, zerobuf
);
120 fill_fpregset (fpregset_t
*fpregsetp
, int regno
)
125 for (regi
= FP0_REGNUM
; regi
< FP0_REGNUM
+ 32; regi
++)
127 if ((regno
== -1) || (regno
== regi
))
129 from
= (char *) ®isters
[REGISTER_BYTE (regi
)];
130 to
= (char *) &(fpregsetp
->fp_r
.fp_regs
[regi
- FP0_REGNUM
]);
131 memcpy (to
, from
, REGISTER_RAW_SIZE (regi
));
135 if ((regno
== -1) || (regno
== FCRCS_REGNUM
))
136 fpregsetp
->fp_csr
= *(unsigned *) ®isters
[REGISTER_BYTE (FCRCS_REGNUM
)];
140 /* Figure out where the longjmp will land.
141 We expect the first arg to be a pointer to the jmp_buf structure from which
142 we extract the pc (JB_PC) that we will land at. The pc is copied into PC.
143 This routine returns true on success. */
146 get_longjmp_target (CORE_ADDR
*pc
)
151 buf
= alloca (TARGET_PTR_BIT
/ TARGET_CHAR_BIT
);
152 jb_addr
= read_register (A0_REGNUM
);
154 if (target_read_memory (jb_addr
+ JB_PC
* JB_ELEMENT_SIZE
, buf
,
155 TARGET_PTR_BIT
/ TARGET_CHAR_BIT
))
158 *pc
= extract_address (buf
, TARGET_PTR_BIT
/ TARGET_CHAR_BIT
);
164 fetch_core_registers (core_reg_sect
, core_reg_size
, which
, reg_addr
)
166 unsigned core_reg_size
;
167 int which
; /* Unused */
168 CORE_ADDR reg_addr
; /* Unused */
170 if (core_reg_size
!= REGISTER_BYTES
)
172 warning ("wrong size gregset struct in core file");
176 memcpy ((char *) registers
, core_reg_sect
, core_reg_size
);
180 /* Register that we are able to handle irix4 core file formats.
181 FIXME: is this really bfd_target_unknown_flavour? */
183 static struct core_fns irix4_core_fns
=
185 bfd_target_unknown_flavour
, /* core_flavour */
186 default_check_format
, /* check_format */
187 default_core_sniffer
, /* core_sniffer */
188 fetch_core_registers
, /* core_read_registers */
193 _initialize_core_irix4 (void)
195 add_core_fns (&irix4_core_fns
);