1 /* Native support for the SGI Iris running IRIX version 5, for GDB.
2 Copyright 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1998,
3 1999, 2000, 2001, 2002 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.
7 Modified for Irix 5.x by Ian Lance Taylor.
9 This file is part of GDB.
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.
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.
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. */
32 #include "gdb_string.h"
34 #include <sys/procfs.h>
35 #include <setjmp.h> /* For JB_XXX. */
37 /* Prototypes for supply_gregset etc. */
40 static void fetch_core_registers (char *, unsigned int, int, CORE_ADDR
);
42 /* Size of elements in jmpbuf */
44 #define JB_ELEMENT_SIZE 4
47 * See the comment in m68k-tdep.c regarding the utility of these functions.
49 * These definitions are from the MIPS SVR4 ABI, so they may work for
50 * any MIPS SVR4 target.
54 supply_gregset (gregset_t
*gregsetp
)
57 register greg_t
*regp
= &(*gregsetp
)[0];
58 int gregoff
= sizeof (greg_t
) - MIPS_REGSIZE
;
59 static char zerobuf
[32] = {0};
61 for (regi
= 0; regi
<= CTX_RA
; regi
++)
62 supply_register (regi
, (char *) (regp
+ regi
) + gregoff
);
64 supply_register (PC_REGNUM
, (char *) (regp
+ CTX_EPC
) + gregoff
);
65 supply_register (HI_REGNUM
, (char *) (regp
+ CTX_MDHI
) + gregoff
);
66 supply_register (LO_REGNUM
, (char *) (regp
+ CTX_MDLO
) + gregoff
);
67 supply_register (CAUSE_REGNUM
, (char *) (regp
+ CTX_CAUSE
) + gregoff
);
69 /* Fill inaccessible registers with zero. */
70 supply_register (BADVADDR_REGNUM
, zerobuf
);
74 fill_gregset (gregset_t
*gregsetp
, int regno
)
77 register greg_t
*regp
= &(*gregsetp
)[0];
79 /* Under Irix6, if GDB is built with N32 ABI and is debugging an O32
80 executable, we have to sign extend the registers to 64 bits before
81 filling in the gregset structure. */
83 for (regi
= 0; regi
<= CTX_RA
; regi
++)
84 if ((regno
== -1) || (regno
== regi
))
86 extract_signed_integer (®isters
[REGISTER_BYTE (regi
)],
87 REGISTER_RAW_SIZE (regi
));
89 if ((regno
== -1) || (regno
== PC_REGNUM
))
91 extract_signed_integer (®isters
[REGISTER_BYTE (PC_REGNUM
)],
92 REGISTER_RAW_SIZE (PC_REGNUM
));
94 if ((regno
== -1) || (regno
== CAUSE_REGNUM
))
96 extract_signed_integer (®isters
[REGISTER_BYTE (CAUSE_REGNUM
)],
97 REGISTER_RAW_SIZE (CAUSE_REGNUM
));
99 if ((regno
== -1) || (regno
== HI_REGNUM
))
101 extract_signed_integer (®isters
[REGISTER_BYTE (HI_REGNUM
)],
102 REGISTER_RAW_SIZE (HI_REGNUM
));
104 if ((regno
== -1) || (regno
== LO_REGNUM
))
106 extract_signed_integer (®isters
[REGISTER_BYTE (LO_REGNUM
)],
107 REGISTER_RAW_SIZE (LO_REGNUM
));
111 * Now we do the same thing for floating-point registers.
112 * We don't bother to condition on FP0_REGNUM since any
113 * reasonable MIPS configuration has an R3010 in it.
115 * Again, see the comments in m68k-tdep.c.
119 supply_fpregset (fpregset_t
*fpregsetp
)
122 static char zerobuf
[32] = {0};
124 /* FIXME, this is wrong for the N32 ABI which has 64 bit FP regs. */
126 for (regi
= 0; regi
< 32; regi
++)
127 supply_register (FP0_REGNUM
+ regi
,
128 (char *) &fpregsetp
->fp_r
.fp_regs
[regi
]);
130 supply_register (FCRCS_REGNUM
, (char *) &fpregsetp
->fp_csr
);
132 /* FIXME: how can we supply FCRIR_REGNUM? SGI doesn't tell us. */
133 supply_register (FCRIR_REGNUM
, zerobuf
);
137 fill_fpregset (fpregset_t
*fpregsetp
, int regno
)
142 /* FIXME, this is wrong for the N32 ABI which has 64 bit FP regs. */
144 for (regi
= FP0_REGNUM
; regi
< FP0_REGNUM
+ 32; regi
++)
146 if ((regno
== -1) || (regno
== regi
))
148 from
= (char *) ®isters
[REGISTER_BYTE (regi
)];
149 to
= (char *) &(fpregsetp
->fp_r
.fp_regs
[regi
- FP0_REGNUM
]);
150 memcpy (to
, from
, REGISTER_RAW_SIZE (regi
));
154 if ((regno
== -1) || (regno
== FCRCS_REGNUM
))
155 fpregsetp
->fp_csr
= *(unsigned *) ®isters
[REGISTER_BYTE (FCRCS_REGNUM
)];
159 /* Figure out where the longjmp will land.
160 We expect the first arg to be a pointer to the jmp_buf structure from which
161 we extract the pc (JB_PC) that we will land at. The pc is copied into PC.
162 This routine returns true on success. */
165 get_longjmp_target (CORE_ADDR
*pc
)
170 buf
= alloca (TARGET_PTR_BIT
/ TARGET_CHAR_BIT
);
171 jb_addr
= read_register (A0_REGNUM
);
173 if (target_read_memory (jb_addr
+ JB_PC
* JB_ELEMENT_SIZE
, buf
,
174 TARGET_PTR_BIT
/ TARGET_CHAR_BIT
))
177 *pc
= extract_address (buf
, TARGET_PTR_BIT
/ TARGET_CHAR_BIT
);
182 /* Provide registers to GDB from a core file.
184 CORE_REG_SECT points to an array of bytes, which were obtained from
185 a core file which BFD thinks might contain register contents.
186 CORE_REG_SIZE is its size.
188 Normally, WHICH says which register set corelow suspects this is:
189 0 --- the general-purpose register set
190 2 --- the floating-point register set
191 However, for Irix 5, WHICH isn't used.
193 REG_ADDR is also unused. */
196 fetch_core_registers (char *core_reg_sect
, unsigned core_reg_size
,
197 int which
, CORE_ADDR reg_addr
)
199 if (core_reg_size
== REGISTER_BYTES
)
201 memcpy ((char *) registers
, core_reg_sect
, core_reg_size
);
203 else if (MIPS_REGSIZE
== 4 &&
204 core_reg_size
== (2 * MIPS_REGSIZE
) * NUM_REGS
)
206 /* This is a core file from a N32 executable, 64 bits are saved
207 for all registers. */
208 char *srcp
= core_reg_sect
;
209 char *dstp
= registers
;
212 for (regno
= 0; regno
< NUM_REGS
; regno
++)
214 if (regno
>= FP0_REGNUM
&& regno
< (FP0_REGNUM
+ 32))
216 /* FIXME, this is wrong, N32 has 64 bit FP regs, but GDB
217 currently assumes that they are 32 bit. */
222 if (REGISTER_RAW_SIZE (regno
) == 4)
224 /* copying 4 bytes from eight bytes?
225 I don't see how this can be right... */
230 /* copy all 8 bytes (sizeof(double)) */
249 warning ("wrong size gregset struct in core file");
253 deprecated_registers_fetched ();
256 /* Register that we are able to handle irix5 core file formats.
257 This really is bfd_target_unknown_flavour */
259 static struct core_fns irix5_core_fns
=
261 bfd_target_unknown_flavour
, /* core_flavour */
262 default_check_format
, /* check_format */
263 default_core_sniffer
, /* core_sniffer */
264 fetch_core_registers
, /* core_read_registers */
269 _initialize_core_irix5 (void)
271 add_core_fns (&irix5_core_fns
);