Commit | Line | Data |
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def18405 MK |
1 | /* Native-dependent code for NetBSD/powerpc. |
2 | ||
b811d2c2 | 3 | Copyright (C) 2002-2020 Free Software Foundation, Inc. |
def18405 | 4 | |
485721b1 | 5 | Contributed by Wasabi Systems, Inc. |
e42180d7 C |
6 | |
7 | This file is part of GDB. | |
8 | ||
9 | This program is free software; you can redistribute it and/or modify | |
10 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 11 | the Free Software Foundation; either version 3 of the License, or |
e42180d7 C |
12 | (at your option) any later version. |
13 | ||
14 | This program is distributed in the hope that it will be useful, | |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
a9762ec7 | 20 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
e42180d7 | 21 | |
52feded7 KR |
22 | /* We define this to get types like register_t. */ |
23 | #define _KERNTYPES | |
0baeab03 PA |
24 | #include "defs.h" |
25 | ||
e42180d7 C |
26 | #include <sys/types.h> |
27 | #include <sys/ptrace.h> | |
28 | #include <machine/reg.h> | |
69e9e646 NW |
29 | #include <machine/frame.h> |
30 | #include <machine/pcb.h> | |
e42180d7 | 31 | |
69e9e646 | 32 | #include "gdbcore.h" |
def18405 | 33 | #include "inferior.h" |
69e9e646 | 34 | #include "regcache.h" |
def18405 | 35 | |
485721b1 | 36 | #include "ppc-tdep.h" |
03b62bbb | 37 | #include "ppc-nbsd-tdep.h" |
def18405 | 38 | #include "bsd-kvm.h" |
5bf970f9 AC |
39 | #include "inf-ptrace.h" |
40 | ||
f6ac5f3d PA |
41 | struct ppc_nbsd_nat_target final : public inf_ptrace_target |
42 | { | |
43 | void fetch_registers (struct regcache *, int) override; | |
44 | void store_registers (struct regcache *, int) override; | |
45 | }; | |
46 | ||
47 | static ppc_nbsd_nat_target the_ppc_nbsd_nat_target; | |
48 | ||
485721b1 | 49 | /* Returns true if PT_GETREGS fetches this register. */ |
def18405 | 50 | |
485721b1 | 51 | static int |
206988c4 | 52 | getregs_supplies (struct gdbarch *gdbarch, int regnum) |
e42180d7 | 53 | { |
206988c4 | 54 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
485721b1 | 55 | |
def18405 MK |
56 | return ((regnum >= tdep->ppc_gp0_regnum |
57 | && regnum < tdep->ppc_gp0_regnum + ppc_num_gprs) | |
58 | || regnum == tdep->ppc_lr_regnum | |
59 | || regnum == tdep->ppc_cr_regnum | |
60 | || regnum == tdep->ppc_xer_regnum | |
61 | || regnum == tdep->ppc_ctr_regnum | |
206988c4 | 62 | || regnum == gdbarch_pc_regnum (gdbarch)); |
e42180d7 C |
63 | } |
64 | ||
485721b1 | 65 | /* Like above, but for PT_GETFPREGS. */ |
def18405 | 66 | |
485721b1 | 67 | static int |
206988c4 | 68 | getfpregs_supplies (struct gdbarch *gdbarch, int regnum) |
e42180d7 | 69 | { |
206988c4 | 70 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
e42180d7 | 71 | |
383f0f5b JB |
72 | /* FIXME: jimb/2004-05-05: Some PPC variants don't have floating |
73 | point registers. Traditionally, GDB's register set has still | |
74 | listed the floating point registers for such machines, so this | |
75 | code is harmless. However, the new E500 port actually omits the | |
76 | floating point registers entirely from the register set --- they | |
77 | don't even have register numbers assigned to them. | |
78 | ||
79 | It's not clear to me how best to update this code, so this assert | |
80 | will alert the first person to encounter the NetBSD/E500 | |
81 | combination to the problem. */ | |
206988c4 | 82 | gdb_assert (ppc_floating_point_unit_p (gdbarch)); |
383f0f5b | 83 | |
def18405 MK |
84 | return ((regnum >= tdep->ppc_fp0_regnum |
85 | && regnum < tdep->ppc_fp0_regnum + ppc_num_fprs) | |
86 | || regnum == tdep->ppc_fpscr_regnum); | |
485721b1 | 87 | } |
e42180d7 | 88 | |
f6ac5f3d PA |
89 | void |
90 | ppc_nbsd_nat_target::fetch_registers (struct regcache *regcache, int regnum) | |
e42180d7 | 91 | { |
ac7936df | 92 | struct gdbarch *gdbarch = regcache->arch (); |
e99b03dc | 93 | pid_t pid = regcache->ptid ().pid (); |
206988c4 MD |
94 | |
95 | if (regnum == -1 || getregs_supplies (gdbarch, regnum)) | |
485721b1 JT |
96 | { |
97 | struct reg regs; | |
98 | ||
bcc0c096 | 99 | if (ptrace (PT_GETREGS, pid, (PTRACE_TYPE_ARG3) ®s, 0) == -1) |
e2e0b3e5 | 100 | perror_with_name (_("Couldn't get registers")); |
485721b1 | 101 | |
56be3814 | 102 | ppc_supply_gregset (&ppcnbsd_gregset, regcache, |
def18405 | 103 | regnum, ®s, sizeof regs); |
485721b1 JT |
104 | } |
105 | ||
206988c4 | 106 | if (regnum == -1 || getfpregs_supplies (gdbarch, regnum)) |
485721b1 JT |
107 | { |
108 | struct fpreg fpregs; | |
109 | ||
bcc0c096 | 110 | if (ptrace (PT_GETFPREGS, pid, (PTRACE_TYPE_ARG3) &fpregs, 0) == -1) |
e2e0b3e5 | 111 | perror_with_name (_("Couldn't get FP registers")); |
485721b1 | 112 | |
56be3814 | 113 | ppc_supply_fpregset (&ppcnbsd_fpregset, regcache, |
def18405 | 114 | regnum, &fpregs, sizeof fpregs); |
485721b1 | 115 | } |
e42180d7 C |
116 | } |
117 | ||
f6ac5f3d PA |
118 | void |
119 | ppc_nbsd_nat_target::store_registers (struct regcache *regcache, int regnum) | |
e42180d7 | 120 | { |
ac7936df | 121 | struct gdbarch *gdbarch = regcache->arch (); |
e99b03dc | 122 | pid_t pid = regcache->ptid ().pid (); |
206988c4 MD |
123 | |
124 | if (regnum == -1 || getregs_supplies (gdbarch, regnum)) | |
485721b1 JT |
125 | { |
126 | struct reg regs; | |
127 | ||
bcc0c096 | 128 | if (ptrace (PT_GETREGS, pid, (PTRACE_TYPE_ARG3) ®s, 0) == -1) |
e2e0b3e5 | 129 | perror_with_name (_("Couldn't get registers")); |
485721b1 | 130 | |
56be3814 | 131 | ppc_collect_gregset (&ppcnbsd_gregset, regcache, |
def18405 | 132 | regnum, ®s, sizeof regs); |
485721b1 | 133 | |
bcc0c096 | 134 | if (ptrace (PT_SETREGS, pid, (PTRACE_TYPE_ARG3) ®s, 0) == -1) |
e2e0b3e5 | 135 | perror_with_name (_("Couldn't write registers")); |
485721b1 JT |
136 | } |
137 | ||
206988c4 | 138 | if (regnum == -1 || getfpregs_supplies (gdbarch, regnum)) |
485721b1 JT |
139 | { |
140 | struct fpreg fpregs; | |
141 | ||
bcc0c096 | 142 | if (ptrace (PT_GETFPREGS, pid, (PTRACE_TYPE_ARG3) &fpregs, 0) == -1) |
e2e0b3e5 | 143 | perror_with_name (_("Couldn't get FP registers")); |
485721b1 | 144 | |
56be3814 | 145 | ppc_collect_fpregset (&ppcnbsd_fpregset, regcache, |
def18405 MK |
146 | regnum, &fpregs, sizeof fpregs); |
147 | ||
bcc0c096 | 148 | if (ptrace (PT_SETFPREGS, pid, (PTRACE_TYPE_ARG3) &fpregs, 0) == -1) |
e2e0b3e5 | 149 | perror_with_name (_("Couldn't set FP registers")); |
485721b1 | 150 | } |
e42180d7 | 151 | } |
69e9e646 NW |
152 | |
153 | static int | |
154 | ppcnbsd_supply_pcb (struct regcache *regcache, struct pcb *pcb) | |
155 | { | |
156 | struct switchframe sf; | |
157 | struct callframe cf; | |
ac7936df | 158 | struct gdbarch *gdbarch = regcache->arch (); |
40a6adc1 | 159 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
69e9e646 NW |
160 | int i; |
161 | ||
162 | /* The stack pointer shouldn't be zero. */ | |
163 | if (pcb->pcb_sp == 0) | |
164 | return 0; | |
165 | ||
def18405 | 166 | read_memory (pcb->pcb_sp, (gdb_byte *)&sf, sizeof sf); |
73e1c03f SM |
167 | regcache->raw_supply (tdep->ppc_cr_regnum, &sf.cr); |
168 | regcache->raw_supply (tdep->ppc_gp0_regnum + 2, &sf.fixreg2); | |
69e9e646 | 169 | for (i = 0 ; i < 19 ; i++) |
73e1c03f | 170 | regcache->raw_supply (tdep->ppc_gp0_regnum + 13 + i, &sf.fixreg[i]); |
69e9e646 | 171 | |
def18405 | 172 | read_memory(sf.sp, (gdb_byte *)&cf, sizeof(cf)); |
73e1c03f SM |
173 | regcache->raw_supply (tdep->ppc_gp0_regnum + 30, &cf.r30); |
174 | regcache->raw_supply (tdep->ppc_gp0_regnum + 31, &cf.r31); | |
175 | regcache->raw_supply (tdep->ppc_gp0_regnum + 1, &cf.sp); | |
69e9e646 | 176 | |
def18405 | 177 | read_memory(cf.sp, (gdb_byte *)&cf, sizeof(cf)); |
73e1c03f SM |
178 | regcache->raw_supply (tdep->ppc_lr_regnum, &cf.lr); |
179 | regcache->raw_supply (gdbarch_pc_regnum (gdbarch), &cf.lr); | |
69e9e646 NW |
180 | |
181 | return 1; | |
182 | } | |
183 | ||
6c265988 | 184 | void _initialize_ppcnbsd_nat (); |
69e9e646 | 185 | void |
6c265988 | 186 | _initialize_ppcnbsd_nat () |
69e9e646 NW |
187 | { |
188 | /* Support debugging kernel virtual memory images. */ | |
189 | bsd_kvm_add_target (ppcnbsd_supply_pcb); | |
def18405 | 190 | |
d9f719f1 | 191 | add_inf_child_target (&the_ppc_nbsd_nat_target); |
69e9e646 | 192 | } |