1 /* Native-dependent code for PA-RISC HP-UX.
3 Copyright (C) 2004, 2005 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 2 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, write to the Free Software
19 Foundation, Inc., 51 Franklin Street, Fifth Floor,
20 Boston, MA 02110-1301, USA. */
27 #include "gdb_assert.h"
28 #include <sys/ptrace.h>
29 #include <machine/save_state.h>
32 #include <sys/ttrace.h>
35 #include "hppa-tdep.h"
36 #include "inf-ptrace.h"
37 #include "inf-ttrace.h"
39 /* Non-zero if we should pretend not to be a runnable target. */
40 int child_suppress_run = 0;
42 /* Return the offset of register REGNUM within `struct save_state'.
43 The offset returns depends on the flags in the "flags" register and
44 the register size (32-bit or 64-bit). These are taken from
48 hppa_hpux_save_state_offset (struct regcache *regcache, int regnum)
52 if (regnum == HPPA_FLAGS_REGNUM)
53 return ssoff (ss_flags);
55 if (HPPA_R0_REGNUM < regnum && regnum < HPPA_FP0_REGNUM)
57 struct gdbarch *arch = get_regcache_arch (regcache);
58 size_t size = register_size (arch, HPPA_R1_REGNUM);
61 gdb_assert (size == 4 || size == 8);
63 regcache_cooked_read_unsigned (regcache, HPPA_FLAGS_REGNUM, &flags);
64 if (flags & SS_WIDEREGS)
65 offset = ssoff (ss_wide) + (8 - size) + (regnum - HPPA_R0_REGNUM) * 8;
67 offset = ssoff (ss_narrow) + (regnum - HPPA_R1_REGNUM) * 4;
71 struct gdbarch *arch = get_regcache_arch (regcache);
72 size_t size = register_size (arch, HPPA_FP0_REGNUM);
74 gdb_assert (size == 4 || size == 8);
75 gdb_assert (regnum >= HPPA_FP0_REGNUM);
76 offset = ssoff(ss_fpblock) + (regnum - HPPA_FP0_REGNUM) * size;
79 gdb_assert (offset < sizeof (save_state_t));
83 /* Just in case a future version of PA-RISC HP-UX won't have ptrace(2)
85 #ifndef PTRACE_TYPE_RET
86 #define PTRACE_TYPE_RET void
90 hppa_hpux_fetch_register (int regnum)
98 pid = ptid_get_pid (inferior_ptid);
100 /* This isn't really an address, but ptrace thinks of it as one. */
101 addr = hppa_hpux_save_state_offset(current_regcache, regnum);
102 size = register_size (current_gdbarch, regnum);
104 gdb_assert (size == 4 || size == 8);
109 lwpid_t lwp = ptid_get_lwp (inferior_ptid);
111 if (ttrace (TT_LWP_RUREGS, pid, lwp, addr, size, (uintptr_t)buf) == -1)
112 error (_("Couldn't read register %s (#%d): %s"),
113 REGISTER_NAME (regnum), 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 REGISTER_NAME (regnum), 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)
137 ULONGEST flags = extract_unsigned_integer ((gdb_byte *)buf, 4);
138 store_unsigned_integer ((gdb_byte *)buf, 8, flags);
141 regcache_raw_supply (current_regcache, regnum, buf);
145 hppa_hpux_fetch_inferior_registers (int regnum)
148 for (regnum = 0; regnum < NUM_REGS; regnum++)
149 hppa_hpux_fetch_register (regnum);
151 hppa_hpux_fetch_register (regnum);
154 /* Store register REGNUM into the inferior. */
157 hppa_hpux_store_register (int regnum)
161 PTRACE_TYPE_RET *buf;
164 pid = ptid_get_pid (inferior_ptid);
166 /* This isn't really an address, but ptrace thinks of it as one. */
167 addr = hppa_hpux_save_state_offset(current_regcache, regnum);
168 size = register_size (current_gdbarch, regnum);
170 gdb_assert (size == 4 || size == 8);
173 regcache_raw_collect (current_regcache, regnum, buf);
175 /* Take care with the "flags" register. It's stored as an `int' in
176 `struct save_state', even for 64-bit code. */
177 if (regnum == HPPA_FLAGS_REGNUM && size == 8)
179 ULONGEST flags = extract_unsigned_integer ((gdb_byte *)buf, 8);
180 store_unsigned_integer ((gdb_byte *)buf, 4, flags);
186 lwpid_t lwp = ptid_get_lwp (inferior_ptid);
188 if (ttrace (TT_LWP_WUREGS, pid, lwp, addr, size, (uintptr_t)buf) == -1)
189 error (_("Couldn't write register %s (#%d): %s"),
190 REGISTER_NAME (regnum), regnum, safe_strerror (errno));
196 /* Write the register contents into the inferior a chunk at the time. */
197 for (i = 0; i < size / sizeof (PTRACE_TYPE_RET); i++)
200 ptrace (PT_WUREGS, pid, (PTRACE_TYPE_ARG3) addr, buf[i], 0);
202 error (_("Couldn't write register %s (#%d): %s"),
203 REGISTER_NAME (regnum), regnum, safe_strerror (errno));
205 addr += sizeof (PTRACE_TYPE_RET);
211 /* Store register REGNUM back into the inferior. If REGNUM is -1, do
212 this for all registers (including the floating point registers). */
215 hppa_hpux_store_inferior_registers (int regnum)
218 for (regnum = 0; regnum < NUM_REGS; regnum++)
219 hppa_hpux_store_register (regnum);
221 hppa_hpux_store_register (regnum);
225 hppa_hpux_child_can_run (void)
227 /* This variable is controlled by modules that layer their own
228 process structure atop that provided here. The code in
229 hpux-thread.c does this to support the HP-UX user-mode DCE
231 return !child_suppress_run;
235 /* Prevent warning from -Wmissing-prototypes. */
236 void _initialize_hppa_hpux_nat (void);
239 _initialize_hppa_hpux_nat (void)
241 struct target_ops *t;
244 t = inf_ttrace_target ();
246 t = inf_ptrace_target ();
249 t->to_fetch_registers = hppa_hpux_fetch_inferior_registers;
250 t->to_store_registers = hppa_hpux_store_inferior_registers;
251 t->to_can_run = hppa_hpux_child_can_run;