1 /* Low level Alpha interface, for GDB when running native.
2 Copyright (C) 1993, 1995, 1996, 1998, 1999, 2000, 2001, 2003, 2007
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., 51 Franklin Street, Fifth Floor,
20 Boston, MA 02110-1301, USA. */
23 #include "gdb_string.h"
29 #include "alpha-tdep.h"
31 #include <sys/ptrace.h>
32 #include <alpha/coreregs.h>
36 /* Extract the register values out of the core file and store
37 them where `read_register' will find them.
39 CORE_REG_SECT points to the register values themselves, read into memory.
40 CORE_REG_SIZE is the size of that area.
41 WHICH says which set of registers we are handling (0 = int, 2 = float
42 on machines where they are discontiguous).
43 REG_ADDR is the offset from u.u_ar0 to the register values relative to
44 core_reg_sect. This is used with old-fashioned core files to
45 locate the registers in a large upage-plus-stack ".reg" section.
46 Original upage address X is at location core_reg_sect+x+reg_addr.
50 fetch_osf_core_registers (char *core_reg_sect
, unsigned core_reg_size
,
51 int which
, CORE_ADDR reg_addr
)
57 /* Table to map a gdb regnum to an index in the core register
58 section. The floating point register values are garbage in
59 OSF/1.2 core files. OSF5 uses different names for the register
60 enum list, need to handle two cases. The actual values are the
62 static int const core_reg_mapping
[ALPHA_NUM_REGS
] =
66 CF_V0
, CF_T0
, CF_T1
, CF_T2
, CF_T3
, CF_T4
, CF_T5
, CF_T6
,
67 CF_T7
, CF_S0
, CF_S1
, CF_S2
, CF_S3
, CF_S4
, CF_S5
, CF_S6
,
68 CF_A0
, CF_A1
, CF_A2
, CF_A3
, CF_A4
, CF_A5
, CF_T8
, CF_T9
,
69 CF_T10
, CF_T11
, CF_RA
, CF_T12
, CF_AT
, CF_GP
, CF_SP
, -1,
70 EFL
+ 0, EFL
+ 1, EFL
+ 2, EFL
+ 3, EFL
+ 4, EFL
+ 5, EFL
+ 6, EFL
+ 7,
71 EFL
+ 8, EFL
+ 9, EFL
+ 10, EFL
+ 11, EFL
+ 12, EFL
+ 13, EFL
+ 14, EFL
+ 15,
72 EFL
+ 16, EFL
+ 17, EFL
+ 18, EFL
+ 19, EFL
+ 20, EFL
+ 21, EFL
+ 22, EFL
+ 23,
73 EFL
+ 24, EFL
+ 25, EFL
+ 26, EFL
+ 27, EFL
+ 28, EFL
+ 29, EFL
+ 30, EFL
+ 31,
76 #define EFL (EF_SIZE / 8)
77 EF_V0
, EF_T0
, EF_T1
, EF_T2
, EF_T3
, EF_T4
, EF_T5
, EF_T6
,
78 EF_T7
, EF_S0
, EF_S1
, EF_S2
, EF_S3
, EF_S4
, EF_S5
, EF_S6
,
79 EF_A0
, EF_A1
, EF_A2
, EF_A3
, EF_A4
, EF_A5
, EF_T8
, EF_T9
,
80 EF_T10
, EF_T11
, EF_RA
, EF_T12
, EF_AT
, EF_GP
, EF_SP
, -1,
81 EFL
+ 0, EFL
+ 1, EFL
+ 2, EFL
+ 3, EFL
+ 4, EFL
+ 5, EFL
+ 6, EFL
+ 7,
82 EFL
+ 8, EFL
+ 9, EFL
+ 10, EFL
+ 11, EFL
+ 12, EFL
+ 13, EFL
+ 14, EFL
+ 15,
83 EFL
+ 16, EFL
+ 17, EFL
+ 18, EFL
+ 19, EFL
+ 20, EFL
+ 21, EFL
+ 22, EFL
+ 23,
84 EFL
+ 24, EFL
+ 25, EFL
+ 26, EFL
+ 27, EFL
+ 28, EFL
+ 29, EFL
+ 30, EFL
+ 31,
89 for (regno
= 0; regno
< ALPHA_NUM_REGS
; regno
++)
91 if (CANNOT_FETCH_REGISTER (regno
))
93 regcache_raw_supply (current_regcache
, regno
, NULL
);
96 addr
= 8 * core_reg_mapping
[regno
];
97 if (addr
< 0 || addr
>= core_reg_size
)
99 /* ??? UNIQUE is a new addition. Don't generate an error. */
100 if (regno
== ALPHA_UNIQUE_REGNUM
)
102 regcache_raw_supply (current_regcache
, regno
, NULL
);
110 regcache_raw_supply (current_regcache
, regno
, core_reg_sect
+ addr
);
115 error (_("Register %s not found in core file."), REGISTER_NAME (bad_reg
));
120 /* Map gdb internal register number to a ptrace ``address''.
121 These ``addresses'' are defined in <sys/ptrace.h>, with
122 the exception of ALPHA_UNIQUE_PTRACE_ADDR. */
124 #define ALPHA_UNIQUE_PTRACE_ADDR 0
127 register_addr (int regno
, CORE_ADDR blockend
)
129 if (regno
== PC_REGNUM
)
131 if (regno
== ALPHA_UNIQUE_REGNUM
)
132 return ALPHA_UNIQUE_PTRACE_ADDR
;
133 if (regno
< FP0_REGNUM
)
134 return GPR_BASE
+ regno
;
136 return FPR_BASE
+ regno
- FP0_REGNUM
;
142 return (sizeof (struct user
));
145 #if defined(USE_PROC_FS) || defined(HAVE_GREGSET_T)
146 #include <sys/procfs.h>
148 /* Prototypes for supply_gregset etc. */
151 /* Given a pointer to either a gregset_t or fpregset_t, return a
152 pointer to the first register. */
153 #define ALPHA_REGSET_BASE(regsetp) ((regsetp)->regs)
155 /* Locate the UNIQUE value within the gregset_t. */
156 #define ALPHA_REGSET_UNIQUE(ptr) NULL
159 * See the comment in m68k-tdep.c regarding the utility of these functions.
163 supply_gregset (gdb_gregset_t
*gregsetp
)
165 long *regp
= ALPHA_REGSET_BASE (gregsetp
);
166 void *unique
= ALPHA_REGSET_UNIQUE (gregsetp
);
168 /* PC is in slot 32. */
169 alpha_supply_int_regs (-1, regp
, regp
+ 31, unique
);
173 fill_gregset (gdb_gregset_t
*gregsetp
, int regno
)
175 long *regp
= ALPHA_REGSET_BASE (gregsetp
);
176 void *unique
= ALPHA_REGSET_UNIQUE (gregsetp
);
178 /* PC is in slot 32. */
179 alpha_fill_int_regs (regno
, regp
, regp
+ 31, unique
);
183 * Now we do the same thing for floating-point registers.
184 * Again, see the comments in m68k-tdep.c.
188 supply_fpregset (gdb_fpregset_t
*fpregsetp
)
190 long *regp
= ALPHA_REGSET_BASE (fpregsetp
);
192 /* FPCR is in slot 32. */
193 alpha_supply_fp_regs (-1, regp
, regp
+ 31);
197 fill_fpregset (gdb_fpregset_t
*fpregsetp
, int regno
)
199 long *regp
= ALPHA_REGSET_BASE (fpregsetp
);
201 /* FPCR is in slot 32. */
202 alpha_fill_fp_regs (regno
, regp
, regp
+ 31);
207 /* Register that we are able to handle alpha core file formats. */
209 static struct core_fns alpha_osf_core_fns
=
211 /* This really is bfd_target_unknown_flavour. */
213 bfd_target_unknown_flavour
, /* core_flavour */
214 default_check_format
, /* check_format */
215 default_core_sniffer
, /* core_sniffer */
216 fetch_osf_core_registers
, /* core_read_registers */
221 _initialize_core_alpha (void)
223 deprecated_add_core_fns (&alpha_osf_core_fns
);