1 /* Native support for the SGI Iris running IRIX version 4, for GDB.
2 Copyright 1988, 1989, 1990, 1991, 1992, 1993, 1995, 1996, 1999, 2000,
3 2001 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. */
31 #include <sys/procfs.h>
32 #include <setjmp.h> /* For JB_XXX. */
34 /* Prototypes for supply_gregset etc. */
37 /* Size of elements in jmpbuf */
39 #define JB_ELEMENT_SIZE 4
41 typedef unsigned int greg_t
; /* why isn't this defined? */
43 static void fetch_core_registers (char *, unsigned int, int, CORE_ADDR
);
46 * See the comment in m68k-tdep.c regarding the utility of these functions.
50 supply_gregset (gregset_t
*gregsetp
)
53 register greg_t
*regp
= (greg_t
*) (gregsetp
->gp_regs
);
54 char *zerobuf
= alloca (max_register_size (current_gdbarch
));
55 memset (zerobuf
, 0, max_register_size (current_gdbarch
));
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 (gregset_t
*gregsetp
, int regno
)
75 register greg_t
*regp
= (greg_t
*) (gregsetp
->gp_regs
);
77 /* same FIXME as above wrt 32 */
78 for (regi
= 0; regi
< 32; regi
++)
79 if ((regno
== -1) || (regno
== regi
))
80 *(regp
+ regi
) = *(greg_t
*) & deprecated_registers
[REGISTER_BYTE (regi
)];
82 if ((regno
== -1) || (regno
== PC_REGNUM
))
83 gregsetp
->gp_pc
= *(greg_t
*) & deprecated_registers
[REGISTER_BYTE (PC_REGNUM
)];
85 if ((regno
== -1) || (regno
== CAUSE_REGNUM
))
86 gregsetp
->gp_cause
= *(greg_t
*) & deprecated_registers
[REGISTER_BYTE (CAUSE_REGNUM
)];
88 if ((regno
== -1) || (regno
== HI_REGNUM
))
89 gregsetp
->gp_mdhi
= *(greg_t
*) & deprecated_registers
[REGISTER_BYTE (HI_REGNUM
)];
91 if ((regno
== -1) || (regno
== LO_REGNUM
))
92 gregsetp
->gp_mdlo
= *(greg_t
*) & deprecated_registers
[REGISTER_BYTE (LO_REGNUM
)];
96 * Now we do the same thing for floating-point registers.
97 * We don't bother to condition on FP0_REGNUM since any
98 * reasonable MIPS configuration has an R3010 in it.
100 * Again, see the comments in m68k-tdep.c.
104 supply_fpregset (fpregset_t
*fpregsetp
)
107 char *zerobuf
= alloca (max_register_size (current_gdbarch
));
108 memset (zerobuf
, 0, max_register_size (current_gdbarch
));
110 for (regi
= 0; regi
< 32; regi
++)
111 supply_register (FP0_REGNUM
+ regi
,
112 (char *) &fpregsetp
->fp_r
.fp_regs
[regi
]);
114 supply_register (FCRCS_REGNUM
, (char *) &fpregsetp
->fp_csr
);
116 /* FIXME: how can we supply FCRIR_REGNUM? SGI doesn't tell us. */
117 supply_register (FCRIR_REGNUM
, zerobuf
);
121 fill_fpregset (fpregset_t
*fpregsetp
, int regno
)
126 for (regi
= FP0_REGNUM
; regi
< FP0_REGNUM
+ 32; regi
++)
128 if ((regno
== -1) || (regno
== regi
))
130 from
= (char *) &deprecated_registers
[REGISTER_BYTE (regi
)];
131 to
= (char *) &(fpregsetp
->fp_r
.fp_regs
[regi
- FP0_REGNUM
]);
132 memcpy (to
, from
, REGISTER_RAW_SIZE (regi
));
136 if ((regno
== -1) || (regno
== FCRCS_REGNUM
))
137 fpregsetp
->fp_csr
= *(unsigned *) &deprecated_registers
[REGISTER_BYTE (FCRCS_REGNUM
)];
141 /* Figure out where the longjmp will land.
142 We expect the first arg to be a pointer to the jmp_buf structure from which
143 we extract the pc (JB_PC) that we will land at. The pc is copied into PC.
144 This routine returns true on success. */
147 get_longjmp_target (CORE_ADDR
*pc
)
152 buf
= alloca (TARGET_PTR_BIT
/ TARGET_CHAR_BIT
);
153 jb_addr
= read_register (A0_REGNUM
);
155 if (target_read_memory (jb_addr
+ JB_PC
* JB_ELEMENT_SIZE
, buf
,
156 TARGET_PTR_BIT
/ TARGET_CHAR_BIT
))
159 *pc
= extract_address (buf
, TARGET_PTR_BIT
/ TARGET_CHAR_BIT
);
164 /* Provide registers to GDB from a core file.
166 CORE_REG_SECT points to an array of bytes, which were obtained from
167 a core file which BFD thinks might contain register contents.
168 CORE_REG_SIZE is its size.
170 Normally, WHICH says which register set corelow suspects this is:
171 0 --- the general-purpose register set
172 2 --- the floating-point register set
173 However, for Irix 4, WHICH isn't used.
175 REG_ADDR is also unused. */
178 fetch_core_registers (char *core_reg_sect
, unsigned core_reg_size
,
179 int which
, CORE_ADDR reg_addr
)
181 if (core_reg_size
!= REGISTER_BYTES
)
183 warning ("wrong size gregset struct in core file");
187 memcpy ((char *) deprecated_registers
, core_reg_sect
, core_reg_size
);
191 /* Register that we are able to handle irix4 core file formats.
192 FIXME: is this really bfd_target_unknown_flavour? */
194 static struct core_fns irix4_core_fns
=
196 bfd_target_unknown_flavour
, /* core_flavour */
197 default_check_format
, /* check_format */
198 default_core_sniffer
, /* core_sniffer */
199 fetch_core_registers
, /* core_read_registers */
204 _initialize_core_irix4 (void)
206 add_core_fns (&irix4_core_fns
);