1 /* Low level Alpha interface, for GDB when running native.
2 Copyright 1993, 1995, 1996 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 /* Size of elements in jmpbuf */
35 #define JB_ELEMENT_SIZE 8
37 /* The definition for JB_PC in machine/reg.h is wrong.
38 And we can't get at the correct definition in setjmp.h as it is
39 not always available (eg. if _POSIX_SOURCE is defined which is the
40 default). As the defintion is unlikely to change (see comment
41 in <setjmp.h>, define the correct value here. */
46 /* Figure out where the longjmp will land.
47 We expect the first arg to be a pointer to the jmp_buf structure from which
48 we extract the pc (JB_PC) that we will land at. The pc is copied into PC.
49 This routine returns true on success. */
52 get_longjmp_target (pc
)
56 char raw_buffer
[MAX_REGISTER_RAW_SIZE
];
58 jb_addr
= read_register(A0_REGNUM
);
60 if (target_read_memory(jb_addr
+ JB_PC
* JB_ELEMENT_SIZE
, raw_buffer
,
64 *pc
= extract_address (raw_buffer
, sizeof(CORE_ADDR
));
68 /* Extract the register values out of the core file and store
69 them where `read_register' will find them.
71 CORE_REG_SECT points to the register values themselves, read into memory.
72 CORE_REG_SIZE is the size of that area.
73 WHICH says which set of registers we are handling (0 = int, 2 = float
74 on machines where they are discontiguous).
75 REG_ADDR is the offset from u.u_ar0 to the register values relative to
76 core_reg_sect. This is used with old-fashioned core files to
77 locate the registers in a large upage-plus-stack ".reg" section.
78 Original upage address X is at location core_reg_sect+x+reg_addr.
82 fetch_core_registers (core_reg_sect
, core_reg_size
, which
, reg_addr
)
84 unsigned core_reg_size
;
92 /* Table to map a gdb regnum to an index in the core register section.
93 The floating point register values are garbage in OSF/1.2 core files. */
94 static int core_reg_mapping
[NUM_REGS
] =
96 #define EFL (EF_SIZE / 8)
97 EF_V0
, EF_T0
, EF_T1
, EF_T2
, EF_T3
, EF_T4
, EF_T5
, EF_T6
,
98 EF_T7
, EF_S0
, EF_S1
, EF_S2
, EF_S3
, EF_S4
, EF_S5
, EF_S6
,
99 EF_A0
, EF_A1
, EF_A2
, EF_A3
, EF_A4
, EF_A5
, EF_T8
, EF_T9
,
100 EF_T10
, EF_T11
, EF_RA
, EF_T12
, EF_AT
, EF_GP
, EF_SP
, -1,
101 EFL
+0, EFL
+1, EFL
+2, EFL
+3, EFL
+4, EFL
+5, EFL
+6, EFL
+7,
102 EFL
+8, EFL
+9, EFL
+10, EFL
+11, EFL
+12, EFL
+13, EFL
+14, EFL
+15,
103 EFL
+16, EFL
+17, EFL
+18, EFL
+19, EFL
+20, EFL
+21, EFL
+22, EFL
+23,
104 EFL
+24, EFL
+25, EFL
+26, EFL
+27, EFL
+28, EFL
+29, EFL
+30, EFL
+31,
107 static char zerobuf
[MAX_REGISTER_RAW_SIZE
] = {0};
109 for (regno
= 0; regno
< NUM_REGS
; regno
++)
111 if (CANNOT_FETCH_REGISTER (regno
))
113 supply_register (regno
, zerobuf
);
116 addr
= 8 * core_reg_mapping
[regno
];
117 if (addr
< 0 || addr
>= core_reg_size
)
124 supply_register (regno
, core_reg_sect
+ addr
);
129 error ("Register %s not found in core file.", reg_names
[bad_reg
]);
133 /* Map gdb internal register number to a ptrace ``address''.
134 These ``addresses'' are defined in <sys/ptrace.h> */
136 #define REGISTER_PTRACE_ADDR(regno) \
137 (regno < FP0_REGNUM ? GPR_BASE + (regno) \
138 : regno == PC_REGNUM ? PC \
139 : regno >= FP0_REGNUM ? FPR_BASE + ((regno) - FP0_REGNUM) \
142 /* Return the ptrace ``address'' of register REGNO. */
145 register_addr (regno
, blockend
)
149 return REGISTER_PTRACE_ADDR (regno
);
155 return (sizeof (struct user
));
159 #include <sys/procfs.h>
162 * See the comment in m68k-tdep.c regarding the utility of these functions.
166 supply_gregset (gregsetp
)
170 register long *regp
= gregsetp
->regs
;
171 static char zerobuf
[MAX_REGISTER_RAW_SIZE
] = {0};
173 for (regi
= 0; regi
< 31; regi
++)
174 supply_register (regi
, (char *)(regp
+ regi
));
176 supply_register (PC_REGNUM
, (char *)(regp
+ 31));
178 /* Fill inaccessible registers with zero. */
179 supply_register (ZERO_REGNUM
, zerobuf
);
180 supply_register (FP_REGNUM
, zerobuf
);
184 fill_gregset (gregsetp
, regno
)
189 register long *regp
= gregsetp
->regs
;
191 for (regi
= 0; regi
< 31; regi
++)
192 if ((regno
== -1) || (regno
== regi
))
193 *(regp
+ regi
) = *(long *) ®isters
[REGISTER_BYTE (regi
)];
195 if ((regno
== -1) || (regno
== PC_REGNUM
))
196 *(regp
+ 31) = *(long *) ®isters
[REGISTER_BYTE (PC_REGNUM
)];
200 * Now we do the same thing for floating-point registers.
201 * Again, see the comments in m68k-tdep.c.
205 supply_fpregset (fpregsetp
)
206 fpregset_t
*fpregsetp
;
209 register long *regp
= fpregsetp
->regs
;
211 for (regi
= 0; regi
< 32; regi
++)
212 supply_register (regi
+ FP0_REGNUM
, (char *)(regp
+ regi
));
216 fill_fpregset (fpregsetp
, regno
)
217 fpregset_t
*fpregsetp
;
221 register long *regp
= fpregsetp
->regs
;
223 for (regi
= FP0_REGNUM
; regi
< FP0_REGNUM
+ 32; regi
++)
225 if ((regno
== -1) || (regno
== regi
))
227 *(regp
+ regi
- FP0_REGNUM
) =
228 *(long *) ®isters
[REGISTER_BYTE (regi
)];
235 /* Register that we are able to handle alpha core file formats. */
237 static struct core_fns alpha_core_fns
=
239 bfd_target_aout_flavour
,
240 fetch_core_registers
,
245 _initialize_core_alpha ()
247 add_core_fns (&alpha_core_fns
);
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