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def18405 MK |
1 | /* Native-dependent code for NetBSD/powerpc. |
2 | ||
0b302171 | 3 | Copyright (C) 2002, 2004-2012 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 C |
21 | |
22 | #include <sys/types.h> | |
23 | #include <sys/ptrace.h> | |
24 | #include <machine/reg.h> | |
69e9e646 NW |
25 | #include <machine/frame.h> |
26 | #include <machine/pcb.h> | |
e42180d7 C |
27 | |
28 | #include "defs.h" | |
69e9e646 | 29 | #include "gdbcore.h" |
def18405 | 30 | #include "inferior.h" |
69e9e646 | 31 | #include "regcache.h" |
def18405 MK |
32 | |
33 | #include "gdb_assert.h" | |
e42180d7 | 34 | |
485721b1 JT |
35 | #include "ppc-tdep.h" |
36 | #include "ppcnbsd-tdep.h" | |
def18405 | 37 | #include "bsd-kvm.h" |
5bf970f9 AC |
38 | #include "inf-ptrace.h" |
39 | ||
485721b1 | 40 | /* Returns true if PT_GETREGS fetches this register. */ |
def18405 | 41 | |
485721b1 | 42 | static int |
206988c4 | 43 | getregs_supplies (struct gdbarch *gdbarch, int regnum) |
e42180d7 | 44 | { |
206988c4 | 45 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
485721b1 | 46 | |
def18405 MK |
47 | return ((regnum >= tdep->ppc_gp0_regnum |
48 | && regnum < tdep->ppc_gp0_regnum + ppc_num_gprs) | |
49 | || regnum == tdep->ppc_lr_regnum | |
50 | || regnum == tdep->ppc_cr_regnum | |
51 | || regnum == tdep->ppc_xer_regnum | |
52 | || regnum == tdep->ppc_ctr_regnum | |
206988c4 | 53 | || regnum == gdbarch_pc_regnum (gdbarch)); |
e42180d7 C |
54 | } |
55 | ||
485721b1 | 56 | /* Like above, but for PT_GETFPREGS. */ |
def18405 | 57 | |
485721b1 | 58 | static int |
206988c4 | 59 | getfpregs_supplies (struct gdbarch *gdbarch, int regnum) |
e42180d7 | 60 | { |
206988c4 | 61 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
e42180d7 | 62 | |
383f0f5b JB |
63 | /* FIXME: jimb/2004-05-05: Some PPC variants don't have floating |
64 | point registers. Traditionally, GDB's register set has still | |
65 | listed the floating point registers for such machines, so this | |
66 | code is harmless. However, the new E500 port actually omits the | |
67 | floating point registers entirely from the register set --- they | |
68 | don't even have register numbers assigned to them. | |
69 | ||
70 | It's not clear to me how best to update this code, so this assert | |
71 | will alert the first person to encounter the NetBSD/E500 | |
72 | combination to the problem. */ | |
206988c4 | 73 | gdb_assert (ppc_floating_point_unit_p (gdbarch)); |
383f0f5b | 74 | |
def18405 MK |
75 | return ((regnum >= tdep->ppc_fp0_regnum |
76 | && regnum < tdep->ppc_fp0_regnum + ppc_num_fprs) | |
77 | || regnum == tdep->ppc_fpscr_regnum); | |
485721b1 | 78 | } |
e42180d7 | 79 | |
5bf970f9 | 80 | static void |
28439f5e PA |
81 | ppcnbsd_fetch_inferior_registers (struct target_ops *ops, |
82 | struct regcache *regcache, int regnum) | |
e42180d7 | 83 | { |
206988c4 MD |
84 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
85 | ||
86 | if (regnum == -1 || getregs_supplies (gdbarch, regnum)) | |
485721b1 JT |
87 | { |
88 | struct reg regs; | |
89 | ||
90 | if (ptrace (PT_GETREGS, PIDGET (inferior_ptid), | |
9f8e0089 | 91 | (PTRACE_TYPE_ARG3) ®s, 0) == -1) |
e2e0b3e5 | 92 | perror_with_name (_("Couldn't get registers")); |
485721b1 | 93 | |
56be3814 | 94 | ppc_supply_gregset (&ppcnbsd_gregset, regcache, |
def18405 | 95 | regnum, ®s, sizeof regs); |
485721b1 JT |
96 | } |
97 | ||
206988c4 | 98 | if (regnum == -1 || getfpregs_supplies (gdbarch, regnum)) |
485721b1 JT |
99 | { |
100 | struct fpreg fpregs; | |
101 | ||
102 | if (ptrace (PT_GETFPREGS, PIDGET (inferior_ptid), | |
9f8e0089 | 103 | (PTRACE_TYPE_ARG3) &fpregs, 0) == -1) |
e2e0b3e5 | 104 | perror_with_name (_("Couldn't get FP registers")); |
485721b1 | 105 | |
56be3814 | 106 | ppc_supply_fpregset (&ppcnbsd_fpregset, regcache, |
def18405 | 107 | regnum, &fpregs, sizeof fpregs); |
485721b1 | 108 | } |
e42180d7 C |
109 | } |
110 | ||
5bf970f9 | 111 | static void |
28439f5e PA |
112 | ppcnbsd_store_inferior_registers (struct target_ops *ops, |
113 | struct regcache *regcache, int regnum) | |
e42180d7 | 114 | { |
206988c4 MD |
115 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
116 | ||
117 | if (regnum == -1 || getregs_supplies (gdbarch, regnum)) | |
485721b1 JT |
118 | { |
119 | struct reg regs; | |
120 | ||
121 | if (ptrace (PT_GETREGS, PIDGET (inferior_ptid), | |
9f8e0089 | 122 | (PTRACE_TYPE_ARG3) ®s, 0) == -1) |
e2e0b3e5 | 123 | perror_with_name (_("Couldn't get registers")); |
485721b1 | 124 | |
56be3814 | 125 | ppc_collect_gregset (&ppcnbsd_gregset, regcache, |
def18405 | 126 | regnum, ®s, sizeof regs); |
485721b1 JT |
127 | |
128 | if (ptrace (PT_SETREGS, PIDGET (inferior_ptid), | |
9f8e0089 | 129 | (PTRACE_TYPE_ARG3) ®s, 0) == -1) |
e2e0b3e5 | 130 | perror_with_name (_("Couldn't write registers")); |
485721b1 JT |
131 | } |
132 | ||
206988c4 | 133 | if (regnum == -1 || getfpregs_supplies (gdbarch, regnum)) |
485721b1 JT |
134 | { |
135 | struct fpreg fpregs; | |
136 | ||
137 | if (ptrace (PT_GETFPREGS, PIDGET (inferior_ptid), | |
9f8e0089 | 138 | (PTRACE_TYPE_ARG3) &fpregs, 0) == -1) |
e2e0b3e5 | 139 | perror_with_name (_("Couldn't get FP registers")); |
485721b1 | 140 | |
56be3814 | 141 | ppc_collect_fpregset (&ppcnbsd_fpregset, regcache, |
def18405 MK |
142 | regnum, &fpregs, sizeof fpregs); |
143 | ||
485721b1 | 144 | if (ptrace (PT_SETFPREGS, PIDGET (inferior_ptid), |
9f8e0089 | 145 | (PTRACE_TYPE_ARG3) &fpregs, 0) == -1) |
e2e0b3e5 | 146 | perror_with_name (_("Couldn't set FP registers")); |
485721b1 | 147 | } |
e42180d7 | 148 | } |
69e9e646 NW |
149 | |
150 | static int | |
151 | ppcnbsd_supply_pcb (struct regcache *regcache, struct pcb *pcb) | |
152 | { | |
153 | struct switchframe sf; | |
154 | struct callframe cf; | |
40a6adc1 MD |
155 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
156 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); | |
69e9e646 NW |
157 | int i; |
158 | ||
159 | /* The stack pointer shouldn't be zero. */ | |
160 | if (pcb->pcb_sp == 0) | |
161 | return 0; | |
162 | ||
def18405 | 163 | read_memory (pcb->pcb_sp, (gdb_byte *)&sf, sizeof sf); |
69e9e646 NW |
164 | regcache_raw_supply (regcache, tdep->ppc_cr_regnum, &sf.cr); |
165 | regcache_raw_supply (regcache, tdep->ppc_gp0_regnum + 2, &sf.fixreg2); | |
166 | for (i = 0 ; i < 19 ; i++) | |
167 | regcache_raw_supply (regcache, tdep->ppc_gp0_regnum + 13 + i, | |
168 | &sf.fixreg[i]); | |
169 | ||
def18405 | 170 | read_memory(sf.sp, (gdb_byte *)&cf, sizeof(cf)); |
69e9e646 NW |
171 | regcache_raw_supply (regcache, tdep->ppc_gp0_regnum + 30, &cf.r30); |
172 | regcache_raw_supply (regcache, tdep->ppc_gp0_regnum + 31, &cf.r31); | |
173 | regcache_raw_supply (regcache, tdep->ppc_gp0_regnum + 1, &cf.sp); | |
174 | ||
def18405 | 175 | read_memory(cf.sp, (gdb_byte *)&cf, sizeof(cf)); |
69e9e646 | 176 | regcache_raw_supply (regcache, tdep->ppc_lr_regnum, &cf.lr); |
40a6adc1 | 177 | regcache_raw_supply (regcache, gdbarch_pc_regnum (gdbarch), &cf.lr); |
69e9e646 NW |
178 | |
179 | return 1; | |
180 | } | |
181 | ||
182 | /* Provide a prototype to silence -Wmissing-prototypes. */ | |
183 | void _initialize_ppcnbsd_nat (void); | |
184 | ||
185 | void | |
186 | _initialize_ppcnbsd_nat (void) | |
187 | { | |
5bf970f9 | 188 | struct target_ops *t; |
def18405 | 189 | |
69e9e646 NW |
190 | /* Support debugging kernel virtual memory images. */ |
191 | bsd_kvm_add_target (ppcnbsd_supply_pcb); | |
def18405 | 192 | |
5bf970f9 AC |
193 | /* Add in local overrides. */ |
194 | t = inf_ptrace_target (); | |
195 | t->to_fetch_registers = ppcnbsd_fetch_inferior_registers; | |
196 | t->to_store_registers = ppcnbsd_store_inferior_registers; | |
197 | add_target (t); | |
69e9e646 | 198 | } |