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, Boston, MA 02111-1307, USA. */
24 #include <sys/ptrace.h>
27 # include <alpha/ptrace.h>
29 # include <machine/reg.h>
33 static void fetch_osf_core_registers
PARAMS ((char *,
34 unsigned, int, CORE_ADDR
));
35 static void fetch_elf_core_registers
PARAMS ((char *,
36 unsigned, int, CORE_ADDR
));
38 /* Size of elements in jmpbuf */
40 #define JB_ELEMENT_SIZE 8
42 /* The definition for JB_PC in machine/reg.h is wrong.
43 And we can't get at the correct definition in setjmp.h as it is
44 not always available (eg. if _POSIX_SOURCE is defined which is the
45 default). As the defintion is unlikely to change (see comment
46 in <setjmp.h>, define the correct value here. */
51 /* Figure out where the longjmp will land.
52 We expect the first arg to be a pointer to the jmp_buf structure from which
53 we extract the pc (JB_PC) that we will land at. The pc is copied into PC.
54 This routine returns true on success. */
57 get_longjmp_target (pc
)
61 char raw_buffer
[MAX_REGISTER_RAW_SIZE
];
63 jb_addr
= read_register(A0_REGNUM
);
65 if (target_read_memory(jb_addr
+ JB_PC
* JB_ELEMENT_SIZE
, raw_buffer
,
69 *pc
= extract_address (raw_buffer
, sizeof(CORE_ADDR
));
73 /* Extract the register values out of the core file and store
74 them where `read_register' will find them.
76 CORE_REG_SECT points to the register values themselves, read into memory.
77 CORE_REG_SIZE is the size of that area.
78 WHICH says which set of registers we are handling (0 = int, 2 = float
79 on machines where they are discontiguous).
80 REG_ADDR is the offset from u.u_ar0 to the register values relative to
81 core_reg_sect. This is used with old-fashioned core files to
82 locate the registers in a large upage-plus-stack ".reg" section.
83 Original upage address X is at location core_reg_sect+x+reg_addr.
87 fetch_osf_core_registers (core_reg_sect
, core_reg_size
, which
, reg_addr
)
89 unsigned core_reg_size
;
97 /* Table to map a gdb regnum to an index in the core register section.
98 The floating point register values are garbage in OSF/1.2 core files. */
99 static int core_reg_mapping
[NUM_REGS
] =
101 #define EFL (EF_SIZE / 8)
102 EF_V0
, EF_T0
, EF_T1
, EF_T2
, EF_T3
, EF_T4
, EF_T5
, EF_T6
,
103 EF_T7
, EF_S0
, EF_S1
, EF_S2
, EF_S3
, EF_S4
, EF_S5
, EF_S6
,
104 EF_A0
, EF_A1
, EF_A2
, EF_A3
, EF_A4
, EF_A5
, EF_T8
, EF_T9
,
105 EF_T10
, EF_T11
, EF_RA
, EF_T12
, EF_AT
, EF_GP
, EF_SP
, -1,
106 EFL
+0, EFL
+1, EFL
+2, EFL
+3, EFL
+4, EFL
+5, EFL
+6, EFL
+7,
107 EFL
+8, EFL
+9, EFL
+10, EFL
+11, EFL
+12, EFL
+13, EFL
+14, EFL
+15,
108 EFL
+16, EFL
+17, EFL
+18, EFL
+19, EFL
+20, EFL
+21, EFL
+22, EFL
+23,
109 EFL
+24, EFL
+25, EFL
+26, EFL
+27, EFL
+28, EFL
+29, EFL
+30, EFL
+31,
112 static char zerobuf
[MAX_REGISTER_RAW_SIZE
] = {0};
114 for (regno
= 0; regno
< NUM_REGS
; regno
++)
116 if (CANNOT_FETCH_REGISTER (regno
))
118 supply_register (regno
, zerobuf
);
121 addr
= 8 * core_reg_mapping
[regno
];
122 if (addr
< 0 || addr
>= core_reg_size
)
129 supply_register (regno
, core_reg_sect
+ addr
);
134 error ("Register %s not found in core file.", reg_names
[bad_reg
]);
139 fetch_elf_core_registers (core_reg_sect
, core_reg_size
, which
, reg_addr
)
141 unsigned core_reg_size
;
145 if (core_reg_size
< 32*8)
147 error ("Core file register section too small (%u bytes).", core_reg_size
);
153 /* The FPU Registers. */
154 memcpy (®isters
[REGISTER_BYTE (FP0_REGNUM
)], core_reg_sect
, 31*8);
155 memset (®isters
[REGISTER_BYTE (FP0_REGNUM
+31)], 0, 8);
156 memset (®ister_valid
[FP0_REGNUM
], 1, 32);
160 /* The General Registers. */
161 memcpy (®isters
[REGISTER_BYTE (V0_REGNUM
)], core_reg_sect
, 31*8);
162 memcpy (®isters
[REGISTER_BYTE (PC_REGNUM
)], core_reg_sect
+31*8, 8);
163 memset (®isters
[REGISTER_BYTE (ZERO_REGNUM
)], 0, 8);
164 memset (®ister_valid
[V0_REGNUM
], 1, 32);
165 register_valid
[PC_REGNUM
] = 1;
170 /* Map gdb internal register number to a ptrace ``address''.
171 These ``addresses'' are defined in <sys/ptrace.h> */
173 #define REGISTER_PTRACE_ADDR(regno) \
174 (regno < FP0_REGNUM ? GPR_BASE + (regno) \
175 : regno == PC_REGNUM ? PC \
176 : regno >= FP0_REGNUM ? FPR_BASE + ((regno) - FP0_REGNUM) \
179 /* Return the ptrace ``address'' of register REGNO. */
182 register_addr (regno
, blockend
)
186 return REGISTER_PTRACE_ADDR (regno
);
192 return (sizeof (struct user
));
195 #if defined(USE_PROC_FS) || defined(HAVE_GREGSET_T)
196 #include <sys/procfs.h>
199 * See the comment in m68k-tdep.c regarding the utility of these functions.
203 supply_gregset (gregsetp
)
207 register long *regp
= ALPHA_REGSET_BASE (gregsetp
);
208 static char zerobuf
[MAX_REGISTER_RAW_SIZE
] = {0};
210 for (regi
= 0; regi
< 31; regi
++)
211 supply_register (regi
, (char *)(regp
+ regi
));
213 supply_register (PC_REGNUM
, (char *)(regp
+ 31));
215 /* Fill inaccessible registers with zero. */
216 supply_register (ZERO_REGNUM
, zerobuf
);
217 supply_register (FP_REGNUM
, zerobuf
);
221 fill_gregset (gregsetp
, regno
)
226 register long *regp
= ALPHA_REGSET_BASE (gregsetp
);
228 for (regi
= 0; regi
< 31; regi
++)
229 if ((regno
== -1) || (regno
== regi
))
230 *(regp
+ regi
) = *(long *) ®isters
[REGISTER_BYTE (regi
)];
232 if ((regno
== -1) || (regno
== PC_REGNUM
))
233 *(regp
+ 31) = *(long *) ®isters
[REGISTER_BYTE (PC_REGNUM
)];
237 * Now we do the same thing for floating-point registers.
238 * Again, see the comments in m68k-tdep.c.
242 supply_fpregset (fpregsetp
)
243 fpregset_t
*fpregsetp
;
246 register long *regp
= ALPHA_REGSET_BASE (fpregsetp
);
248 for (regi
= 0; regi
< 32; regi
++)
249 supply_register (regi
+ FP0_REGNUM
, (char *)(regp
+ regi
));
253 fill_fpregset (fpregsetp
, regno
)
254 fpregset_t
*fpregsetp
;
258 register long *regp
= ALPHA_REGSET_BASE (fpregsetp
);
260 for (regi
= FP0_REGNUM
; regi
< FP0_REGNUM
+ 32; regi
++)
262 if ((regno
== -1) || (regno
== regi
))
264 *(regp
+ regi
- FP0_REGNUM
) =
265 *(long *) ®isters
[REGISTER_BYTE (regi
)];
272 /* Register that we are able to handle alpha core file formats. */
274 static struct core_fns alpha_osf_core_fns
=
276 /* This really is bfd_target_unknown_flavour. */
278 bfd_target_unknown_flavour
,
279 fetch_osf_core_registers
,
283 static struct core_fns alpha_elf_core_fns
=
285 bfd_target_elf_flavour
,
286 fetch_elf_core_registers
,
291 _initialize_core_alpha ()
293 add_core_fns (&alpha_osf_core_fns
);
294 add_core_fns (&alpha_elf_core_fns
);