1 /* Native-dependent code for PA-RISC HP-UX.
3 Copyright (C) 2004-2013 Free Software Foundation, Inc.
5 This file is part of GDB.
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
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
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.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
25 #include "gdb_assert.h"
26 #include <sys/ptrace.h>
27 #include <sys/utsname.h>
28 #include <machine/save_state.h>
31 #include <sys/ttrace.h>
34 #include "hppa-tdep.h"
35 #include "solib-som.h"
36 #include "inf-ptrace.h"
37 #include "inf-ttrace.h"
39 /* Return the offset of register REGNUM within `struct save_state'.
40 The offset returns depends on the flags in the "flags" register and
41 the register size (32-bit or 64-bit). These are taken from
45 hppa_hpux_save_state_offset (struct regcache *regcache, int regnum)
49 if (regnum == HPPA_FLAGS_REGNUM)
50 return ssoff (ss_flags);
52 if (HPPA_R0_REGNUM < regnum && regnum < HPPA_FP0_REGNUM)
54 struct gdbarch *arch = get_regcache_arch (regcache);
55 size_t size = register_size (arch, HPPA_R1_REGNUM);
58 gdb_assert (size == 4 || size == 8);
60 regcache_cooked_read_unsigned (regcache, HPPA_FLAGS_REGNUM, &flags);
61 if (flags & SS_WIDEREGS)
62 offset = ssoff (ss_wide) + (8 - size) + (regnum - HPPA_R0_REGNUM) * 8;
64 offset = ssoff (ss_narrow) + (regnum - HPPA_R1_REGNUM) * 4;
68 struct gdbarch *arch = get_regcache_arch (regcache);
69 size_t size = register_size (arch, HPPA_FP0_REGNUM);
71 gdb_assert (size == 4 || size == 8);
72 gdb_assert (regnum >= HPPA_FP0_REGNUM);
73 offset = ssoff(ss_fpblock) + (regnum - HPPA_FP0_REGNUM) * size;
76 gdb_assert (offset < sizeof (save_state_t));
80 /* Just in case a future version of PA-RISC HP-UX won't have ptrace(2)
82 #ifndef PTRACE_TYPE_RET
83 #define PTRACE_TYPE_RET void
87 hppa_hpux_fetch_register (struct regcache *regcache, int regnum)
89 struct gdbarch *gdbarch = get_regcache_arch (regcache);
90 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
97 pid = ptid_get_pid (inferior_ptid);
99 /* This isn't really an address, but ptrace thinks of it as one. */
100 addr = hppa_hpux_save_state_offset (regcache, regnum);
101 size = register_size (gdbarch, regnum);
103 gdb_assert (size == 4 || size == 8);
108 lwpid_t lwp = ptid_get_lwp (inferior_ptid);
110 if (ttrace (TT_LWP_RUREGS, pid, lwp, addr, size, (uintptr_t)buf) == -1)
111 error (_("Couldn't read register %s (#%d): %s"),
112 gdbarch_register_name (gdbarch, regnum),
113 regnum, safe_strerror (errno));
119 /* Read the register contents from the inferior a chuck at the time. */
120 for (i = 0; i < size / sizeof (PTRACE_TYPE_RET); i++)
123 buf[i] = ptrace (PT_RUREGS, pid, (PTRACE_TYPE_ARG3) addr, 0, 0);
125 error (_("Couldn't read register %s (#%d): %s"),
126 gdbarch_register_name (gdbarch, regnum),
127 regnum, safe_strerror (errno));
129 addr += sizeof (PTRACE_TYPE_RET);
134 /* Take care with the "flags" register. It's stored as an `int' in
135 `struct save_state', even for 64-bit code. */
136 if (regnum == HPPA_FLAGS_REGNUM && size == 8)
139 flags = extract_unsigned_integer ((gdb_byte *)buf, 4, byte_order);
140 store_unsigned_integer ((gdb_byte *)buf, 8, byte_order, flags);
143 regcache_raw_supply (regcache, regnum, buf);
147 hppa_hpux_fetch_inferior_registers (struct target_ops *ops,
148 struct regcache *regcache, int regnum)
152 regnum < gdbarch_num_regs (get_regcache_arch (regcache));
154 hppa_hpux_fetch_register (regcache, regnum);
156 hppa_hpux_fetch_register (regcache, regnum);
159 /* Store register REGNUM into the inferior. */
162 hppa_hpux_store_register (struct regcache *regcache, int regnum)
164 struct gdbarch *gdbarch = get_regcache_arch (regcache);
165 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
168 PTRACE_TYPE_RET *buf;
171 pid = ptid_get_pid (inferior_ptid);
173 /* This isn't really an address, but ptrace thinks of it as one. */
174 addr = hppa_hpux_save_state_offset (regcache, regnum);
175 size = register_size (gdbarch, regnum);
177 gdb_assert (size == 4 || size == 8);
180 regcache_raw_collect (regcache, regnum, buf);
182 /* Take care with the "flags" register. It's stored as an `int' in
183 `struct save_state', even for 64-bit code. */
184 if (regnum == HPPA_FLAGS_REGNUM && size == 8)
187 flags = extract_unsigned_integer ((gdb_byte *)buf, 8, byte_order);
188 store_unsigned_integer ((gdb_byte *)buf, 4, byte_order, flags);
194 lwpid_t lwp = ptid_get_lwp (inferior_ptid);
196 if (ttrace (TT_LWP_WUREGS, pid, lwp, addr, size, (uintptr_t)buf) == -1)
197 error (_("Couldn't write register %s (#%d): %s"),
198 gdbarch_register_name (gdbarch, regnum),
199 regnum, safe_strerror (errno));
205 /* Write the register contents into the inferior a chunk at the time. */
206 for (i = 0; i < size / sizeof (PTRACE_TYPE_RET); i++)
209 ptrace (PT_WUREGS, pid, (PTRACE_TYPE_ARG3) addr, buf[i], 0);
211 error (_("Couldn't write register %s (#%d): %s"),
212 gdbarch_register_name (gdbarch, regnum),
213 regnum, safe_strerror (errno));
215 addr += sizeof (PTRACE_TYPE_RET);
221 /* Store register REGNUM back into the inferior. If REGNUM is -1, do
222 this for all registers (including the floating point registers). */
225 hppa_hpux_store_inferior_registers (struct target_ops *ops,
226 struct regcache *regcache, int regnum)
230 regnum < gdbarch_num_regs (get_regcache_arch (regcache));
232 hppa_hpux_store_register (regcache, regnum);
234 hppa_hpux_store_register (regcache, regnum);
237 /* Set hpux_major_release variable to the value retrieved from a call to
241 set_hpux_major_release (void)
247 p = strchr (x.release, '.');
249 hpux_major_release = atoi (p + 1);
254 /* Prevent warning from -Wmissing-prototypes. */
255 void _initialize_hppa_hpux_nat (void);
258 _initialize_hppa_hpux_nat (void)
260 struct target_ops *t;
262 set_hpux_major_release ();
265 t = inf_ttrace_target ();
267 t = inf_ptrace_target ();
270 t->to_fetch_registers = hppa_hpux_fetch_inferior_registers;
271 t->to_store_registers = hppa_hpux_store_inferior_registers;