1 /* Native support for the SGI Iris running IRIX version 5, for GDB.
3 Copyright (C) 1988-2014 Free Software Foundation, Inc.
5 Contributed by Alessandro Forin(af@cs.cmu.edu) at CMU
6 and by Per Bothner(bothner@cs.wisc.edu) at U.Wisconsin.
7 Implemented for Irix 4.x by Garrett A. Wollman.
8 Modified for Irix 5.x by Ian Lance Taylor.
10 This file is part of GDB.
12 This program is free software; you can redistribute it and/or modify
13 it under the terms of the GNU General Public License as published by
14 the Free Software Foundation; either version 3 of the License, or
15 (at your option) any later version.
17 This program is distributed in the hope that it will be useful,
18 but WITHOUT ANY WARRANTY; without even the implied warranty of
19 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 GNU General Public License for more details.
22 You should have received a copy of the GNU General Public License
23 along with this program. If not, see <http://www.gnu.org/licenses/>. */
32 #include <sys/procfs.h>
33 #include <setjmp.h> /* For JB_XXX. */
35 /* Prototypes for supply_gregset etc. */
37 #include "mips-tdep.h"
39 static void fetch_core_registers (struct regcache
*, char *,
40 unsigned int, int, CORE_ADDR
);
44 * See the comment in m68k-tdep.c regarding the utility of these functions.
46 * These definitions are from the MIPS SVR4 ABI, so they may work for
47 * any MIPS SVR4 target.
51 supply_gregset (struct regcache
*regcache
, const gregset_t
*gregsetp
)
54 const greg_t
*regp
= &(*gregsetp
)[0];
55 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
56 int gregoff
= sizeof (greg_t
) - mips_isa_regsize (gdbarch
);
57 static char zerobuf
[32] = {0};
59 for (regi
= 0; regi
<= CTX_RA
; regi
++)
60 regcache_raw_supply (regcache
, regi
,
61 (const char *) (regp
+ regi
) + gregoff
);
63 regcache_raw_supply (regcache
, mips_regnum (gdbarch
)->pc
,
64 (const char *) (regp
+ CTX_EPC
) + gregoff
);
65 regcache_raw_supply (regcache
, mips_regnum (gdbarch
)->hi
,
66 (const char *) (regp
+ CTX_MDHI
) + gregoff
);
67 regcache_raw_supply (regcache
, mips_regnum (gdbarch
)->lo
,
68 (const char *) (regp
+ CTX_MDLO
) + gregoff
);
69 regcache_raw_supply (regcache
, mips_regnum (gdbarch
)->cause
,
70 (const char *) (regp
+ CTX_CAUSE
) + gregoff
);
72 /* Fill inaccessible registers with zero. */
73 regcache_raw_supply (regcache
, mips_regnum (gdbarch
)->badvaddr
, zerobuf
);
77 fill_gregset (const struct regcache
*regcache
, gregset_t
*gregsetp
, int regno
)
80 greg_t
*regp
= &(*gregsetp
)[0];
81 gdb_byte buf
[MAX_REGISTER_SIZE
];
82 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
83 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
85 /* Under Irix6, if GDB is built with N32 ABI and is debugging an O32
86 executable, we have to sign extend the registers to 64 bits before
87 filling in the gregset structure. */
89 for (regi
= 0; regi
<= CTX_RA
; regi
++)
90 if ((regno
== -1) || (regno
== regi
))
92 size
= register_size (gdbarch
, regi
);
93 regcache_raw_collect (regcache
, regi
, buf
);
94 *(regp
+ regi
) = extract_signed_integer (buf
, size
, byte_order
);
97 if ((regno
== -1) || (regno
== mips_regnum (gdbarch
)->pc
))
99 regi
= mips_regnum (gdbarch
)->pc
;
100 size
= register_size (gdbarch
, regi
);
101 regcache_raw_collect (regcache
, regi
, buf
);
102 *(regp
+ CTX_EPC
) = extract_signed_integer (buf
, size
, byte_order
);
105 if ((regno
== -1) || (regno
== mips_regnum (gdbarch
)->cause
))
107 regi
= mips_regnum (gdbarch
)->cause
;
108 size
= register_size (gdbarch
, regi
);
109 regcache_raw_collect (regcache
, regi
, buf
);
110 *(regp
+ CTX_CAUSE
) = extract_signed_integer (buf
, size
, byte_order
);
113 if ((regno
== -1) || (regno
== mips_regnum (gdbarch
)->hi
))
115 regi
= mips_regnum (gdbarch
)->hi
;
116 size
= register_size (gdbarch
, regi
);
117 regcache_raw_collect (regcache
, regi
, buf
);
118 *(regp
+ CTX_MDHI
) = extract_signed_integer (buf
, size
, byte_order
);
121 if ((regno
== -1) || (regno
== mips_regnum (gdbarch
)->lo
))
123 regi
= mips_regnum (gdbarch
)->lo
;
124 size
= register_size (gdbarch
, regi
);
125 regcache_raw_collect (regcache
, regi
, buf
);
126 *(regp
+ CTX_MDLO
) = extract_signed_integer (buf
, size
, byte_order
);
131 * Now we do the same thing for floating-point registers.
132 * We don't bother to condition on gdbarch_fp0_regnum since any
133 * reasonable MIPS configuration has an R3010 in it.
135 * Again, see the comments in m68k-tdep.c.
139 supply_fpregset (struct regcache
*regcache
, const fpregset_t
*fpregsetp
)
142 static char zerobuf
[32] = {0};
144 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
146 /* FIXME, this is wrong for the N32 ABI which has 64 bit FP regs. */
148 for (regi
= 0; regi
< 32; regi
++)
149 regcache_raw_supply (regcache
, gdbarch_fp0_regnum (gdbarch
) + regi
,
150 (const char *) &fpregsetp
->__fp_r
.__fp_regs
[regi
]);
152 /* We can't supply the FSR register directly to the regcache,
153 because there is a size issue: On one hand, fpregsetp->fp_csr
154 is 32bits long, while the regcache expects a 64bits long value.
155 So we use a buffer of the correct size and copy into it the register
156 value at the proper location. */
157 memset (fsrbuf
, 0, 4);
158 memcpy (fsrbuf
+ 4, &fpregsetp
->__fp_csr
, 4);
160 regcache_raw_supply (regcache
,
161 mips_regnum (gdbarch
)->fp_control_status
, fsrbuf
);
163 /* FIXME: how can we supply FCRIR? SGI doesn't tell us. */
164 regcache_raw_supply (regcache
,
165 mips_regnum (gdbarch
)->fp_implementation_revision
,
170 fill_fpregset (const struct regcache
*regcache
,
171 fpregset_t
*fpregsetp
, int regno
)
175 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
177 /* FIXME, this is wrong for the N32 ABI which has 64 bit FP regs. */
179 for (regi
= gdbarch_fp0_regnum (gdbarch
);
180 regi
< gdbarch_fp0_regnum (gdbarch
) + 32; regi
++)
182 if ((regno
== -1) || (regno
== regi
))
184 const int fp0_regnum
= gdbarch_fp0_regnum (gdbarch
);
186 to
= (char *) &(fpregsetp
->__fp_r
.__fp_regs
[regi
- fp0_regnum
]);
187 regcache_raw_collect (regcache
, regi
, to
);
192 || regno
== mips_regnum (gdbarch
)->fp_control_status
)
196 /* We can't fill the FSR register directly from the regcache,
197 because there is a size issue: On one hand, fpregsetp->fp_csr
198 is 32bits long, while the regcache expects a 64bits long buffer.
199 So we use a buffer of the correct size and copy the register
200 value from that buffer. */
201 regcache_raw_collect (regcache
,
202 mips_regnum (gdbarch
)->fp_control_status
, fsrbuf
);
204 memcpy (&fpregsetp
->__fp_csr
, fsrbuf
+ 4, 4);
209 /* Provide registers to GDB from a core file.
211 CORE_REG_SECT points to an array of bytes, which were obtained from
212 a core file which BFD thinks might contain register contents.
213 CORE_REG_SIZE is its size.
215 Normally, WHICH says which register set corelow suspects this is:
216 0 --- the general-purpose register set
217 2 --- the floating-point register set
218 However, for Irix 5, WHICH isn't used.
220 REG_ADDR is also unused. */
223 fetch_core_registers (struct regcache
*regcache
,
224 char *core_reg_sect
, unsigned core_reg_size
,
225 int which
, CORE_ADDR reg_addr
)
227 char *srcp
= core_reg_sect
;
228 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
229 int regsize
= mips_isa_regsize (gdbarch
);
232 /* If regsize is 8, this is a N32 or N64 core file.
233 If regsize is 4, this is an O32 core file. */
234 if (core_reg_size
!= regsize
* gdbarch_num_regs (gdbarch
))
236 warning (_("wrong size gregset struct in core file"));
240 for (regno
= 0; regno
< gdbarch_num_regs (gdbarch
); regno
++)
242 regcache_raw_supply (regcache
, regno
, srcp
);
247 /* Register that we are able to handle irix5 core file formats.
248 This really is bfd_target_unknown_flavour. */
250 static struct core_fns irix5_core_fns
=
252 bfd_target_unknown_flavour
, /* core_flavour */
253 default_check_format
, /* check_format */
254 default_core_sniffer
, /* core_sniffer */
255 fetch_core_registers
, /* core_read_registers */
259 /* Provide a prototype to silence -Wmissing-prototypes. */
260 extern initialize_file_ftype _initialize_irix5_nat
;
263 _initialize_irix5_nat (void)
265 struct target_ops
*t
;
267 t
= procfs_target ();
268 procfs_use_watchpoints (t
);
271 deprecated_add_core_fns (&irix5_core_fns
);