1 /* Low level Alpha interface, for GDB when running native.
2 Copyright 1993, 1995, 1996, 1998, 1999, 2000, 2001
3 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
28 #include "alpha-tdep.h"
30 #include <sys/ptrace.h>
33 #include <alpha/ptrace.h>
35 #include <alpha/coreregs.h>
39 /* Prototypes for local functions. */
41 static void fetch_osf_core_registers (char *, unsigned, int, CORE_ADDR
);
42 static void fetch_elf_core_registers (char *, unsigned, int, CORE_ADDR
);
44 /* Extract the register values out of the core file and store
45 them where `read_register' will find them.
47 CORE_REG_SECT points to the register values themselves, read into memory.
48 CORE_REG_SIZE is the size of that area.
49 WHICH says which set of registers we are handling (0 = int, 2 = float
50 on machines where they are discontiguous).
51 REG_ADDR is the offset from u.u_ar0 to the register values relative to
52 core_reg_sect. This is used with old-fashioned core files to
53 locate the registers in a large upage-plus-stack ".reg" section.
54 Original upage address X is at location core_reg_sect+x+reg_addr.
58 fetch_osf_core_registers (char *core_reg_sect
, unsigned core_reg_size
,
59 int which
, CORE_ADDR reg_addr
)
65 /* Table to map a gdb regnum to an index in the core register
66 section. The floating point register values are garbage in
67 OSF/1.2 core files. OSF5 uses different names for the register
68 enum list, need to handle two cases. The actual values are the
70 static int core_reg_mapping
[ALPHA_NUM_REGS
] =
74 CF_V0
, CF_T0
, CF_T1
, CF_T2
, CF_T3
, CF_T4
, CF_T5
, CF_T6
,
75 CF_T7
, CF_S0
, CF_S1
, CF_S2
, CF_S3
, CF_S4
, CF_S5
, CF_S6
,
76 CF_A0
, CF_A1
, CF_A2
, CF_A3
, CF_A4
, CF_A5
, CF_T8
, CF_T9
,
77 CF_T10
, CF_T11
, CF_RA
, CF_T12
, CF_AT
, CF_GP
, CF_SP
, -1,
78 EFL
+ 0, EFL
+ 1, EFL
+ 2, EFL
+ 3, EFL
+ 4, EFL
+ 5, EFL
+ 6, EFL
+ 7,
79 EFL
+ 8, EFL
+ 9, EFL
+ 10, EFL
+ 11, EFL
+ 12, EFL
+ 13, EFL
+ 14, EFL
+ 15,
80 EFL
+ 16, EFL
+ 17, EFL
+ 18, EFL
+ 19, EFL
+ 20, EFL
+ 21, EFL
+ 22, EFL
+ 23,
81 EFL
+ 24, EFL
+ 25, EFL
+ 26, EFL
+ 27, EFL
+ 28, EFL
+ 29, EFL
+ 30, EFL
+ 31,
84 #define EFL (EF_SIZE / 8)
85 EF_V0
, EF_T0
, EF_T1
, EF_T2
, EF_T3
, EF_T4
, EF_T5
, EF_T6
,
86 EF_T7
, EF_S0
, EF_S1
, EF_S2
, EF_S3
, EF_S4
, EF_S5
, EF_S6
,
87 EF_A0
, EF_A1
, EF_A2
, EF_A3
, EF_A4
, EF_A5
, EF_T8
, EF_T9
,
88 EF_T10
, EF_T11
, EF_RA
, EF_T12
, EF_AT
, EF_GP
, EF_SP
, -1,
89 EFL
+ 0, EFL
+ 1, EFL
+ 2, EFL
+ 3, EFL
+ 4, EFL
+ 5, EFL
+ 6, EFL
+ 7,
90 EFL
+ 8, EFL
+ 9, EFL
+ 10, EFL
+ 11, EFL
+ 12, EFL
+ 13, EFL
+ 14, EFL
+ 15,
91 EFL
+ 16, EFL
+ 17, EFL
+ 18, EFL
+ 19, EFL
+ 20, EFL
+ 21, EFL
+ 22, EFL
+ 23,
92 EFL
+ 24, EFL
+ 25, EFL
+ 26, EFL
+ 27, EFL
+ 28, EFL
+ 29, EFL
+ 30, EFL
+ 31,
96 static char zerobuf
[ALPHA_MAX_REGISTER_RAW_SIZE
] =
99 for (regno
= 0; regno
< NUM_REGS
; regno
++)
101 if (CANNOT_FETCH_REGISTER (regno
))
103 supply_register (regno
, zerobuf
);
106 addr
= 8 * core_reg_mapping
[regno
];
107 if (addr
< 0 || addr
>= core_reg_size
)
114 supply_register (regno
, core_reg_sect
+ addr
);
119 error ("Register %s not found in core file.", REGISTER_NAME (bad_reg
));
124 fetch_elf_core_registers (char *core_reg_sect
, unsigned core_reg_size
,
125 int which
, CORE_ADDR reg_addr
)
127 if (core_reg_size
< 32 * 8)
129 error ("Core file register section too small (%u bytes).", core_reg_size
);
135 /* The FPU Registers. */
136 memcpy (®isters
[REGISTER_BYTE (FP0_REGNUM
)], core_reg_sect
, 31 * 8);
137 memset (®isters
[REGISTER_BYTE (FP0_REGNUM
+ 31)], 0, 8);
138 memset (®ister_valid
[FP0_REGNUM
], 1, 32);
142 /* The General Registers. */
143 memcpy (®isters
[REGISTER_BYTE (ALPHA_V0_REGNUM
)], core_reg_sect
,
145 memcpy (®isters
[REGISTER_BYTE (PC_REGNUM
)], core_reg_sect
+ 31 * 8, 8);
146 memset (®isters
[REGISTER_BYTE (ALPHA_ZERO_REGNUM
)], 0, 8);
147 memset (®ister_valid
[ALPHA_V0_REGNUM
], 1, 32);
148 register_valid
[PC_REGNUM
] = 1;
153 /* Map gdb internal register number to a ptrace ``address''.
154 These ``addresses'' are defined in <sys/ptrace.h> */
156 #define REGISTER_PTRACE_ADDR(regno) \
157 (regno < FP0_REGNUM ? GPR_BASE + (regno) \
158 : regno == PC_REGNUM ? PC \
159 : regno >= FP0_REGNUM ? FPR_BASE + ((regno) - FP0_REGNUM) \
162 /* Return the ptrace ``address'' of register REGNO. */
165 register_addr (int regno
, CORE_ADDR blockend
)
167 return REGISTER_PTRACE_ADDR (regno
);
173 return (sizeof (struct user
));
176 #if defined(USE_PROC_FS) || defined(HAVE_GREGSET_T)
177 #include <sys/procfs.h>
179 /* Prototypes for supply_gregset etc. */
183 * See the comment in m68k-tdep.c regarding the utility of these functions.
187 supply_gregset (gdb_gregset_t
*gregsetp
)
190 register long *regp
= ALPHA_REGSET_BASE (gregsetp
);
191 static char zerobuf
[ALPHA_MAX_REGISTER_RAW_SIZE
] =
194 for (regi
= 0; regi
< 31; regi
++)
195 supply_register (regi
, (char *) (regp
+ regi
));
197 supply_register (PC_REGNUM
, (char *) (regp
+ 31));
199 /* Fill inaccessible registers with zero. */
200 supply_register (ALPHA_ZERO_REGNUM
, zerobuf
);
201 supply_register (FP_REGNUM
, zerobuf
);
205 fill_gregset (gdb_gregset_t
*gregsetp
, int regno
)
208 register long *regp
= ALPHA_REGSET_BASE (gregsetp
);
210 for (regi
= 0; regi
< 31; regi
++)
211 if ((regno
== -1) || (regno
== regi
))
212 *(regp
+ regi
) = *(long *) ®isters
[REGISTER_BYTE (regi
)];
214 if ((regno
== -1) || (regno
== PC_REGNUM
))
215 *(regp
+ 31) = *(long *) ®isters
[REGISTER_BYTE (PC_REGNUM
)];
219 * Now we do the same thing for floating-point registers.
220 * Again, see the comments in m68k-tdep.c.
224 supply_fpregset (gdb_fpregset_t
*fpregsetp
)
227 register long *regp
= ALPHA_REGSET_BASE (fpregsetp
);
229 for (regi
= 0; regi
< 32; regi
++)
230 supply_register (regi
+ FP0_REGNUM
, (char *) (regp
+ regi
));
234 fill_fpregset (gdb_fpregset_t
*fpregsetp
, int regno
)
237 register long *regp
= ALPHA_REGSET_BASE (fpregsetp
);
239 for (regi
= FP0_REGNUM
; regi
< FP0_REGNUM
+ 32; regi
++)
241 if ((regno
== -1) || (regno
== regi
))
243 *(regp
+ regi
- FP0_REGNUM
) =
244 *(long *) ®isters
[REGISTER_BYTE (regi
)];
251 /* Register that we are able to handle alpha core file formats. */
253 static struct core_fns alpha_osf_core_fns
=
255 /* This really is bfd_target_unknown_flavour. */
257 bfd_target_unknown_flavour
, /* core_flavour */
258 default_check_format
, /* check_format */
259 default_core_sniffer
, /* core_sniffer */
260 fetch_osf_core_registers
, /* core_read_registers */
264 static struct core_fns alpha_elf_core_fns
=
266 bfd_target_elf_flavour
, /* core_flavour */
267 default_check_format
, /* check_format */
268 default_core_sniffer
, /* core_sniffer */
269 fetch_elf_core_registers
, /* core_read_registers */
274 _initialize_core_alpha (void)
276 add_core_fns (&alpha_osf_core_fns
);
277 add_core_fns (&alpha_elf_core_fns
);