Commit | Line | Data |
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448628fe | 1 | /* Native-dependent code for Alpha BSD's. |
07681759 | 2 | |
3666a048 | 3 | Copyright (C) 2000-2021 Free Software Foundation, Inc. |
448628fe MK |
4 | |
5 | This file is part of GDB. | |
6 | ||
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 | |
a9762ec7 | 9 | the Free Software Foundation; either version 3 of the License, or |
448628fe MK |
10 | (at your option) any later version. |
11 | ||
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. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
a9762ec7 | 18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
448628fe | 19 | |
2190cf06 KR |
20 | /* We define this to get types like register_t. */ |
21 | #define _KERNTYPES | |
448628fe | 22 | #include "defs.h" |
4de283e4 TT |
23 | #include "inferior.h" |
24 | #include "regcache.h" | |
448628fe | 25 | |
4de283e4 TT |
26 | #include "alpha-tdep.h" |
27 | #include "alpha-bsd-tdep.h" | |
28 | #include "inf-ptrace.h" | |
1b71cfcf | 29 | #include "netbsd-nat.h" |
4de283e4 TT |
30 | |
31 | #include <sys/types.h> | |
32 | #include <sys/ptrace.h> | |
448628fe | 33 | #include <machine/reg.h> |
4de283e4 | 34 | |
4fed520b | 35 | struct alpha_bsd_nat_target final : public nbsd_nat_target |
f6ac5f3d PA |
36 | { |
37 | void fetch_registers (struct regcache *, int) override; | |
38 | void store_registers (struct regcache *, int) override; | |
39 | }; | |
40 | ||
41 | static alpha_bsd_nat_target the_alpha_bsd_nat_target; | |
42 | ||
e771a871 JT |
43 | /* Determine if PT_GETREGS fetches this register. */ |
44 | ||
45 | static int | |
46 | getregs_supplies (int regno) | |
47 | { | |
dc129d82 | 48 | return ((regno >= ALPHA_V0_REGNUM && regno <= ALPHA_ZERO_REGNUM) |
07681759 | 49 | || regno >= ALPHA_PC_REGNUM); |
e771a871 JT |
50 | } |
51 | ||
448628fe MK |
52 | /* Fetch register REGNO from the inferior. If REGNO is -1, do this |
53 | for all registers (including the floating point registers). */ | |
54 | ||
f6ac5f3d PA |
55 | void |
56 | alpha_bsd_nat_target::fetch_registers (struct regcache *regcache, int regno) | |
448628fe | 57 | { |
6def66f1 KR |
58 | int lwp = regcache->ptid ().lwp (); |
59 | ||
e771a871 JT |
60 | if (regno == -1 || getregs_supplies (regno)) |
61 | { | |
12bcb0fe | 62 | struct reg gregs; |
e771a871 | 63 | |
e99b03dc | 64 | if (ptrace (PT_GETREGS, regcache->ptid ().pid (), |
6def66f1 | 65 | (PTRACE_TYPE_ARG3) &gregs, lwp) == -1) |
edefbb7c | 66 | perror_with_name (_("Couldn't get registers")); |
448628fe | 67 | |
56be3814 | 68 | alphabsd_supply_reg (regcache, (char *) &gregs, regno); |
e771a871 JT |
69 | if (regno != -1) |
70 | return; | |
71 | } | |
448628fe | 72 | |
0963b4bd | 73 | if (regno == -1 |
ac7936df | 74 | || regno >= gdbarch_fp0_regnum (regcache->arch ())) |
448628fe | 75 | { |
12bcb0fe | 76 | struct fpreg fpregs; |
448628fe | 77 | |
e99b03dc | 78 | if (ptrace (PT_GETFPREGS, regcache->ptid ().pid (), |
6def66f1 | 79 | (PTRACE_TYPE_ARG3) &fpregs, lwp) == -1) |
edefbb7c | 80 | perror_with_name (_("Couldn't get floating point status")); |
448628fe | 81 | |
56be3814 | 82 | alphabsd_supply_fpreg (regcache, (char *) &fpregs, regno); |
448628fe | 83 | } |
448628fe MK |
84 | } |
85 | ||
86 | /* Store register REGNO back into the inferior. If REGNO is -1, do | |
87 | this for all registers (including the floating point registers). */ | |
88 | ||
f6ac5f3d PA |
89 | void |
90 | alpha_bsd_nat_target::store_registers (struct regcache *regcache, int regno) | |
448628fe | 91 | { |
6def66f1 KR |
92 | int lwp = regcache->ptid ().lwp (); |
93 | ||
e771a871 JT |
94 | if (regno == -1 || getregs_supplies (regno)) |
95 | { | |
12bcb0fe | 96 | struct reg gregs; |
e99b03dc | 97 | if (ptrace (PT_GETREGS, regcache->ptid ().pid (), |
dda83cd7 SM |
98 | (PTRACE_TYPE_ARG3) &gregs, lwp) == -1) |
99 | perror_with_name (_("Couldn't get registers")); | |
e771a871 | 100 | |
56be3814 | 101 | alphabsd_fill_reg (regcache, (char *) &gregs, regno); |
448628fe | 102 | |
e99b03dc | 103 | if (ptrace (PT_SETREGS, regcache->ptid ().pid (), |
dda83cd7 SM |
104 | (PTRACE_TYPE_ARG3) &gregs, lwp) == -1) |
105 | perror_with_name (_("Couldn't write registers")); | |
448628fe | 106 | |
e771a871 JT |
107 | if (regno != -1) |
108 | return; | |
109 | } | |
448628fe | 110 | |
0963b4bd | 111 | if (regno == -1 |
ac7936df | 112 | || regno >= gdbarch_fp0_regnum (regcache->arch ())) |
448628fe | 113 | { |
12bcb0fe | 114 | struct fpreg fpregs; |
448628fe | 115 | |
e99b03dc | 116 | if (ptrace (PT_GETFPREGS, regcache->ptid ().pid (), |
6def66f1 | 117 | (PTRACE_TYPE_ARG3) &fpregs, lwp) == -1) |
edefbb7c | 118 | perror_with_name (_("Couldn't get floating point status")); |
448628fe | 119 | |
56be3814 | 120 | alphabsd_fill_fpreg (regcache, (char *) &fpregs, regno); |
448628fe | 121 | |
e99b03dc | 122 | if (ptrace (PT_SETFPREGS, regcache->ptid ().pid (), |
6def66f1 | 123 | (PTRACE_TYPE_ARG3) &fpregs, lwp) == -1) |
edefbb7c | 124 | perror_with_name (_("Couldn't write floating point status")); |
448628fe MK |
125 | } |
126 | } | |
4816ec69 MK |
127 | \f |
128 | ||
129 | /* Support for debugging kernel virtual memory images. */ | |
130 | ||
4816ec69 MK |
131 | #include <sys/signal.h> |
132 | #include <machine/pcb.h> | |
133 | ||
134 | #include "bsd-kvm.h" | |
135 | ||
136 | static int | |
137 | alphabsd_supply_pcb (struct regcache *regcache, struct pcb *pcb) | |
138 | { | |
139 | int regnum; | |
140 | ||
141 | /* The following is true for OpenBSD 3.9: | |
142 | ||
143 | The pcb contains the register state at the context switch inside | |
144 | cpu_switch(). */ | |
145 | ||
146 | /* The stack pointer shouldn't be zero. */ | |
147 | if (pcb->pcb_hw.apcb_ksp == 0) | |
148 | return 0; | |
149 | ||
73e1c03f | 150 | regcache->raw_supply (ALPHA_SP_REGNUM, &pcb->pcb_hw.apcb_ksp); |
4816ec69 MK |
151 | |
152 | for (regnum = ALPHA_S0_REGNUM; regnum < ALPHA_A0_REGNUM; regnum++) | |
73e1c03f SM |
153 | regcache->raw_supply (regnum, &pcb->pcb_context[regnum - ALPHA_S0_REGNUM]); |
154 | regcache->raw_supply (ALPHA_RA_REGNUM, &pcb->pcb_context[7]); | |
4816ec69 MK |
155 | |
156 | return 1; | |
157 | } | |
158 | \f | |
0d6e4ad7 | 159 | |
6c265988 | 160 | void _initialize_alphabsd_nat (); |
0d6e4ad7 | 161 | void |
6c265988 | 162 | _initialize_alphabsd_nat () |
0d6e4ad7 | 163 | { |
d9f719f1 | 164 | add_inf_child_target (&the_alpha_bsd_nat_target); |
4816ec69 MK |
165 | |
166 | /* Support debugging kernel virtual memory images. */ | |
167 | bsd_kvm_add_target (alphabsd_supply_pcb); | |
0d6e4ad7 | 168 | } |