1 /* Native-dependent code for PA-RISC HP-UX.
3 Copyright (C) 2004, 2005, 2007, 2008, 2009, 2010, 2011
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 3 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, see <http://www.gnu.org/licenses/>. */
26 #include "gdb_assert.h"
27 #include <sys/ptrace.h>
28 #include <machine/save_state.h>
31 #include <sys/ttrace.h>
34 #include "hppa-tdep.h"
35 #include "inf-ptrace.h"
36 #include "inf-ttrace.h"
38 /* Return the offset of register REGNUM within `struct save_state'.
39 The offset returns depends on the flags in the "flags" register and
40 the register size (32-bit or 64-bit). These are taken from
44 hppa_hpux_save_state_offset (struct regcache *regcache, int regnum)
48 if (regnum == HPPA_FLAGS_REGNUM)
49 return ssoff (ss_flags);
51 if (HPPA_R0_REGNUM < regnum && regnum < HPPA_FP0_REGNUM)
53 struct gdbarch *arch = get_regcache_arch (regcache);
54 size_t size = register_size (arch, HPPA_R1_REGNUM);
57 gdb_assert (size == 4 || size == 8);
59 regcache_cooked_read_unsigned (regcache, HPPA_FLAGS_REGNUM, &flags);
60 if (flags & SS_WIDEREGS)
61 offset = ssoff (ss_wide) + (8 - size) + (regnum - HPPA_R0_REGNUM) * 8;
63 offset = ssoff (ss_narrow) + (regnum - HPPA_R1_REGNUM) * 4;
67 struct gdbarch *arch = get_regcache_arch (regcache);
68 size_t size = register_size (arch, HPPA_FP0_REGNUM);
70 gdb_assert (size == 4 || size == 8);
71 gdb_assert (regnum >= HPPA_FP0_REGNUM);
72 offset = ssoff(ss_fpblock) + (regnum - HPPA_FP0_REGNUM) * size;
75 gdb_assert (offset < sizeof (save_state_t));
79 /* Just in case a future version of PA-RISC HP-UX won't have ptrace(2)
81 #ifndef PTRACE_TYPE_RET
82 #define PTRACE_TYPE_RET void
86 hppa_hpux_fetch_register (struct regcache *regcache, int regnum)
88 struct gdbarch *gdbarch = get_regcache_arch (regcache);
89 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
96 pid = ptid_get_pid (inferior_ptid);
98 /* This isn't really an address, but ptrace thinks of it as one. */
99 addr = hppa_hpux_save_state_offset (regcache, regnum);
100 size = register_size (gdbarch, regnum);
102 gdb_assert (size == 4 || size == 8);
107 lwpid_t lwp = ptid_get_lwp (inferior_ptid);
109 if (ttrace (TT_LWP_RUREGS, pid, lwp, addr, size, (uintptr_t)buf) == -1)
110 error (_("Couldn't read register %s (#%d): %s"),
111 gdbarch_register_name (gdbarch, regnum),
112 regnum, safe_strerror (errno));
118 /* Read the register contents from the inferior a chuck at the time. */
119 for (i = 0; i < size / sizeof (PTRACE_TYPE_RET); i++)
122 buf[i] = ptrace (PT_RUREGS, pid, (PTRACE_TYPE_ARG3) addr, 0, 0);
124 error (_("Couldn't read register %s (#%d): %s"),
125 gdbarch_register_name (gdbarch, regnum),
126 regnum, safe_strerror (errno));
128 addr += sizeof (PTRACE_TYPE_RET);
133 /* Take care with the "flags" register. It's stored as an `int' in
134 `struct save_state', even for 64-bit code. */
135 if (regnum == HPPA_FLAGS_REGNUM && size == 8)
138 flags = extract_unsigned_integer ((gdb_byte *)buf, 4, byte_order);
139 store_unsigned_integer ((gdb_byte *)buf, 8, byte_order, flags);
142 regcache_raw_supply (regcache, regnum, buf);
146 hppa_hpux_fetch_inferior_registers (struct target_ops *ops,
147 struct regcache *regcache, int regnum)
151 regnum < gdbarch_num_regs (get_regcache_arch (regcache));
153 hppa_hpux_fetch_register (regcache, regnum);
155 hppa_hpux_fetch_register (regcache, regnum);
158 /* Store register REGNUM into the inferior. */
161 hppa_hpux_store_register (struct regcache *regcache, int regnum)
163 struct gdbarch *gdbarch = get_regcache_arch (regcache);
164 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
167 PTRACE_TYPE_RET *buf;
170 pid = ptid_get_pid (inferior_ptid);
172 /* This isn't really an address, but ptrace thinks of it as one. */
173 addr = hppa_hpux_save_state_offset (regcache, regnum);
174 size = register_size (gdbarch, regnum);
176 gdb_assert (size == 4 || size == 8);
179 regcache_raw_collect (regcache, regnum, buf);
181 /* Take care with the "flags" register. It's stored as an `int' in
182 `struct save_state', even for 64-bit code. */
183 if (regnum == HPPA_FLAGS_REGNUM && size == 8)
186 flags = extract_unsigned_integer ((gdb_byte *)buf, 8, byte_order);
187 store_unsigned_integer ((gdb_byte *)buf, 4, byte_order, flags);
193 lwpid_t lwp = ptid_get_lwp (inferior_ptid);
195 if (ttrace (TT_LWP_WUREGS, pid, lwp, addr, size, (uintptr_t)buf) == -1)
196 error (_("Couldn't write register %s (#%d): %s"),
197 gdbarch_register_name (gdbarch, regnum),
198 regnum, safe_strerror (errno));
204 /* Write the register contents into the inferior a chunk at the time. */
205 for (i = 0; i < size / sizeof (PTRACE_TYPE_RET); i++)
208 ptrace (PT_WUREGS, pid, (PTRACE_TYPE_ARG3) addr, buf[i], 0);
210 error (_("Couldn't write register %s (#%d): %s"),
211 gdbarch_register_name (gdbarch, regnum),
212 regnum, safe_strerror (errno));
214 addr += sizeof (PTRACE_TYPE_RET);
220 /* Store register REGNUM back into the inferior. If REGNUM is -1, do
221 this for all registers (including the floating point registers). */
224 hppa_hpux_store_inferior_registers (struct target_ops *ops,
225 struct regcache *regcache, int regnum)
229 regnum < gdbarch_num_regs (get_regcache_arch (regcache));
231 hppa_hpux_store_register (regcache, regnum);
233 hppa_hpux_store_register (regcache, regnum);
238 /* Prevent warning from -Wmissing-prototypes. */
239 void _initialize_hppa_hpux_nat (void);
242 _initialize_hppa_hpux_nat (void)
244 struct target_ops *t;
247 t = inf_ttrace_target ();
249 t = inf_ptrace_target ();
252 t->to_fetch_registers = hppa_hpux_fetch_inferior_registers;
253 t->to_store_registers = hppa_hpux_store_inferior_registers;