1 /* Low level Alpha interface, for GDB when running native.
2 Copyright 1993, 1995, 1996, 1998 Free Software Foundation, Inc.
4 This file is part of GDB.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 59 Temple Place - Suite 330,
19 Boston, MA 02111-1307, USA. */
25 #include <sys/ptrace.h>
28 #include <alpha/ptrace.h>
30 #include <machine/reg.h>
34 /* Prototypes for local functions. */
36 static void fetch_osf_core_registers
PARAMS ((char *,
37 unsigned, int, CORE_ADDR
));
38 static void fetch_elf_core_registers
PARAMS ((char *,
39 unsigned, int, CORE_ADDR
));
41 /* Size of elements in jmpbuf */
43 #define JB_ELEMENT_SIZE 8
45 /* The definition for JB_PC in machine/reg.h is wrong.
46 And we can't get at the correct definition in setjmp.h as it is
47 not always available (eg. if _POSIX_SOURCE is defined which is the
48 default). As the defintion is unlikely to change (see comment
49 in <setjmp.h>, define the correct value here. */
54 /* Figure out where the longjmp will land.
55 We expect the first arg to be a pointer to the jmp_buf structure from which
56 we extract the pc (JB_PC) that we will land at. The pc is copied into PC.
57 This routine returns true on success. */
60 get_longjmp_target (pc
)
64 char raw_buffer
[MAX_REGISTER_RAW_SIZE
];
66 jb_addr
= read_register (A0_REGNUM
);
68 if (target_read_memory (jb_addr
+ JB_PC
* JB_ELEMENT_SIZE
, raw_buffer
,
72 *pc
= extract_address (raw_buffer
, sizeof (CORE_ADDR
));
76 /* Extract the register values out of the core file and store
77 them where `read_register' will find them.
79 CORE_REG_SECT points to the register values themselves, read into memory.
80 CORE_REG_SIZE is the size of that area.
81 WHICH says which set of registers we are handling (0 = int, 2 = float
82 on machines where they are discontiguous).
83 REG_ADDR is the offset from u.u_ar0 to the register values relative to
84 core_reg_sect. This is used with old-fashioned core files to
85 locate the registers in a large upage-plus-stack ".reg" section.
86 Original upage address X is at location core_reg_sect+x+reg_addr.
90 fetch_osf_core_registers (core_reg_sect
, core_reg_size
, which
, reg_addr
)
92 unsigned core_reg_size
;
100 /* Table to map a gdb regnum to an index in the core register section.
101 The floating point register values are garbage in OSF/1.2 core files. */
102 static int core_reg_mapping
[NUM_REGS
] =
104 #define EFL (EF_SIZE / 8)
105 EF_V0
, EF_T0
, EF_T1
, EF_T2
, EF_T3
, EF_T4
, EF_T5
, EF_T6
,
106 EF_T7
, EF_S0
, EF_S1
, EF_S2
, EF_S3
, EF_S4
, EF_S5
, EF_S6
,
107 EF_A0
, EF_A1
, EF_A2
, EF_A3
, EF_A4
, EF_A5
, EF_T8
, EF_T9
,
108 EF_T10
, EF_T11
, EF_RA
, EF_T12
, EF_AT
, EF_GP
, EF_SP
, -1,
109 EFL
+ 0, EFL
+ 1, EFL
+ 2, EFL
+ 3, EFL
+ 4, EFL
+ 5, EFL
+ 6, EFL
+ 7,
110 EFL
+ 8, EFL
+ 9, EFL
+ 10, EFL
+ 11, EFL
+ 12, EFL
+ 13, EFL
+ 14, EFL
+ 15,
111 EFL
+ 16, EFL
+ 17, EFL
+ 18, EFL
+ 19, EFL
+ 20, EFL
+ 21, EFL
+ 22, EFL
+ 23,
112 EFL
+ 24, EFL
+ 25, EFL
+ 26, EFL
+ 27, EFL
+ 28, EFL
+ 29, EFL
+ 30, EFL
+ 31,
115 static char zerobuf
[MAX_REGISTER_RAW_SIZE
] =
118 for (regno
= 0; regno
< NUM_REGS
; regno
++)
120 if (CANNOT_FETCH_REGISTER (regno
))
122 supply_register (regno
, zerobuf
);
125 addr
= 8 * core_reg_mapping
[regno
];
126 if (addr
< 0 || addr
>= core_reg_size
)
133 supply_register (regno
, core_reg_sect
+ addr
);
138 error ("Register %s not found in core file.", REGISTER_NAME (bad_reg
));
143 fetch_elf_core_registers (core_reg_sect
, core_reg_size
, which
, reg_addr
)
145 unsigned core_reg_size
;
149 if (core_reg_size
< 32 * 8)
151 error ("Core file register section too small (%u bytes).", core_reg_size
);
157 /* The FPU Registers. */
158 memcpy (®isters
[REGISTER_BYTE (FP0_REGNUM
)], core_reg_sect
, 31 * 8);
159 memset (®isters
[REGISTER_BYTE (FP0_REGNUM
+ 31)], 0, 8);
160 memset (®ister_valid
[FP0_REGNUM
], 1, 32);
164 /* The General Registers. */
165 memcpy (®isters
[REGISTER_BYTE (V0_REGNUM
)], core_reg_sect
, 31 * 8);
166 memcpy (®isters
[REGISTER_BYTE (PC_REGNUM
)], core_reg_sect
+ 31 * 8, 8);
167 memset (®isters
[REGISTER_BYTE (ZERO_REGNUM
)], 0, 8);
168 memset (®ister_valid
[V0_REGNUM
], 1, 32);
169 register_valid
[PC_REGNUM
] = 1;
174 /* Map gdb internal register number to a ptrace ``address''.
175 These ``addresses'' are defined in <sys/ptrace.h> */
177 #define REGISTER_PTRACE_ADDR(regno) \
178 (regno < FP0_REGNUM ? GPR_BASE + (regno) \
179 : regno == PC_REGNUM ? PC \
180 : regno >= FP0_REGNUM ? FPR_BASE + ((regno) - FP0_REGNUM) \
183 /* Return the ptrace ``address'' of register REGNO. */
186 register_addr (regno
, blockend
)
190 return REGISTER_PTRACE_ADDR (regno
);
196 return (sizeof (struct user
));
199 #if defined(USE_PROC_FS) || defined(HAVE_GREGSET_T)
200 #include <sys/procfs.h>
203 * See the comment in m68k-tdep.c regarding the utility of these functions.
207 supply_gregset (gregsetp
)
211 register long *regp
= ALPHA_REGSET_BASE (gregsetp
);
212 static char zerobuf
[MAX_REGISTER_RAW_SIZE
] =
215 for (regi
= 0; regi
< 31; regi
++)
216 supply_register (regi
, (char *) (regp
+ regi
));
218 supply_register (PC_REGNUM
, (char *) (regp
+ 31));
220 /* Fill inaccessible registers with zero. */
221 supply_register (ZERO_REGNUM
, zerobuf
);
222 supply_register (FP_REGNUM
, zerobuf
);
226 fill_gregset (gregsetp
, regno
)
231 register long *regp
= ALPHA_REGSET_BASE (gregsetp
);
233 for (regi
= 0; regi
< 31; regi
++)
234 if ((regno
== -1) || (regno
== regi
))
235 *(regp
+ regi
) = *(long *) ®isters
[REGISTER_BYTE (regi
)];
237 if ((regno
== -1) || (regno
== PC_REGNUM
))
238 *(regp
+ 31) = *(long *) ®isters
[REGISTER_BYTE (PC_REGNUM
)];
242 * Now we do the same thing for floating-point registers.
243 * Again, see the comments in m68k-tdep.c.
247 supply_fpregset (fpregsetp
)
248 fpregset_t
*fpregsetp
;
251 register long *regp
= ALPHA_REGSET_BASE (fpregsetp
);
253 for (regi
= 0; regi
< 32; regi
++)
254 supply_register (regi
+ FP0_REGNUM
, (char *) (regp
+ regi
));
258 fill_fpregset (fpregsetp
, regno
)
259 fpregset_t
*fpregsetp
;
263 register long *regp
= ALPHA_REGSET_BASE (fpregsetp
);
265 for (regi
= FP0_REGNUM
; regi
< FP0_REGNUM
+ 32; regi
++)
267 if ((regno
== -1) || (regno
== regi
))
269 *(regp
+ regi
- FP0_REGNUM
) =
270 *(long *) ®isters
[REGISTER_BYTE (regi
)];
277 /* Register that we are able to handle alpha core file formats. */
279 static struct core_fns alpha_osf_core_fns
=
281 /* This really is bfd_target_unknown_flavour. */
283 bfd_target_unknown_flavour
,
284 fetch_osf_core_registers
,
288 static struct core_fns alpha_elf_core_fns
=
290 bfd_target_elf_flavour
,
291 fetch_elf_core_registers
,
296 _initialize_core_alpha ()
298 add_core_fns (&alpha_osf_core_fns
);
299 add_core_fns (&alpha_elf_core_fns
);