1 /* GNU/Linux/PowerPC specific low level interface, for the remote server for
3 Copyright (C) 1995, 1996, 1998, 1999, 2000, 2001, 2002, 2005
4 Free Software Foundation, Inc.
6 This file is part of GDB.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 51 Franklin Street, Fifth Floor,
21 Boston, MA 02110-1301, USA. */
24 #include "linux-low.h"
26 #include <asm/ptrace.h>
28 #define ppc_num_regs 71
30 /* Currently, don't check/send MQ. */
31 static int ppc_regmap
[] =
32 {PT_R0
* 4, PT_R1
* 4, PT_R2
* 4, PT_R3
* 4,
33 PT_R4
* 4, PT_R5
* 4, PT_R6
* 4, PT_R7
* 4,
34 PT_R8
* 4, PT_R9
* 4, PT_R10
* 4, PT_R11
* 4,
35 PT_R12
* 4, PT_R13
* 4, PT_R14
* 4, PT_R15
* 4,
36 PT_R16
* 4, PT_R17
* 4, PT_R18
* 4, PT_R19
* 4,
37 PT_R20
* 4, PT_R21
* 4, PT_R22
* 4, PT_R23
* 4,
38 PT_R24
* 4, PT_R25
* 4, PT_R26
* 4, PT_R27
* 4,
39 PT_R28
* 4, PT_R29
* 4, PT_R30
* 4, PT_R31
* 4,
40 PT_FPR0
*4, PT_FPR0
*4 + 8, PT_FPR0
*4+16, PT_FPR0
*4+24,
41 PT_FPR0
*4+32, PT_FPR0
*4+40, PT_FPR0
*4+48, PT_FPR0
*4+56,
42 PT_FPR0
*4+64, PT_FPR0
*4+72, PT_FPR0
*4+80, PT_FPR0
*4+88,
43 PT_FPR0
*4+96, PT_FPR0
*4+104, PT_FPR0
*4+112, PT_FPR0
*4+120,
44 PT_FPR0
*4+128, PT_FPR0
*4+136, PT_FPR0
*4+144, PT_FPR0
*4+152,
45 PT_FPR0
*4+160, PT_FPR0
*4+168, PT_FPR0
*4+176, PT_FPR0
*4+184,
46 PT_FPR0
*4+192, PT_FPR0
*4+200, PT_FPR0
*4+208, PT_FPR0
*4+216,
47 PT_FPR0
*4+224, PT_FPR0
*4+232, PT_FPR0
*4+240, PT_FPR0
*4+248,
48 PT_NIP
* 4, PT_MSR
* 4, PT_CCR
* 4, PT_LNK
* 4,
49 PT_CTR
* 4, PT_XER
* 4, PT_FPSCR
* 4, };
52 ppc_cannot_store_register (int regno
)
54 /* Some kernels do not allow us to store fpscr. */
55 if (regno
== find_regno ("fpscr"))
62 ppc_cannot_fetch_register (int regno
)
72 collect_register_by_name ("pc", &pc
);
73 return (CORE_ADDR
) pc
;
77 ppc_set_pc (CORE_ADDR pc
)
79 unsigned long newpc
= pc
;
81 supply_register_by_name ("pc", &newpc
);
84 /* Correct in either endianness. Note that this file is
85 for PowerPC only, not PowerPC64.
86 This instruction is "twge r2, r2", which GDB uses as a software
88 static const unsigned long ppc_breakpoint
= 0x7d821008;
89 #define ppc_breakpoint_len 4
92 ppc_breakpoint_at (CORE_ADDR where
)
96 (*the_target
->read_memory
) (where
, (unsigned char *) &insn
, 4);
97 if (insn
== ppc_breakpoint
)
99 /* If necessary, recognize more trap instructions here. GDB only uses the
104 /* Provide only a fill function for the general register set. ps_lgetregs
105 will use this for NPTL support. */
107 static void ppc_fill_gregset (void *buf
)
111 for (i
= 0; i
< 32; i
++)
112 collect_register (i
, (char *) buf
+ ppc_regmap
[i
]);
114 for (i
= 64; i
< 70; i
++)
115 collect_register (i
, (char *) buf
+ ppc_regmap
[i
]);
118 struct regset_info target_regsets
[] = {
119 { 0, 0, 0, GENERAL_REGS
, ppc_fill_gregset
, NULL
},
120 { 0, 0, -1, -1, NULL
, NULL
}
123 struct linux_target_ops the_low_target
= {
126 ppc_cannot_fetch_register
,
127 ppc_cannot_store_register
,
130 (const unsigned char *) &ppc_breakpoint
,