1/* libunwind - a platform-independent unwind library
2   Copyright (C) 2003 Hewlett-Packard Co
3	Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
4   Copyright (C) 2010 Konstantin Belousov <kib@freebsd.org>
5
6This file is part of libunwind.
7
8Permission is hereby granted, free of charge, to any person obtaining
9a copy of this software and associated documentation files (the
10"Software"), to deal in the Software without restriction, including
11without limitation the rights to use, copy, modify, merge, publish,
12distribute, sublicense, and/or sell copies of the Software, and to
13permit persons to whom the Software is furnished to do so, subject to
14the following conditions:
15
16The above copyright notice and this permission notice shall be
17included in all copies or substantial portions of the Software.
18
19THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
20EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
21MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
22NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
23LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
24OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
25WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
26
27#include "_UPT_internal.h"
28
29#if HAVE_DECL_PTRACE_POKEUSER || HAVE_TTRACE
30int
31_UPT_access_fpreg (unw_addr_space_t as, unw_regnum_t reg, unw_fpreg_t *val,
32		   int write, void *arg)
33{
34  unw_word_t *wp = (unw_word_t *) val;
35  struct UPT_info *ui = arg;
36  pid_t pid = ui->pid;
37  int i;
38
39  if ((unsigned) reg >= ARRAY_SIZE (_UPT_reg_offset))
40    return -UNW_EBADREG;
41
42  errno = 0;
43  if (write)
44    for (i = 0; i < (int) (sizeof (*val) / sizeof (wp[i])); ++i)
45      {
46#ifdef HAVE_TTRACE
47#	warning No support for ttrace() yet.
48#else
49        /* ANDROID support update. */
50	ptrace (PTRACE_POKEUSER, pid, (void*) (_UPT_reg_offset[reg] + i * sizeof(wp[i])),
51		(void*) wp[i]);
52        /* End of ANDROID update. */
53#endif
54	if (errno)
55	  return -UNW_EBADREG;
56      }
57  else
58    for (i = 0; i < (int) (sizeof (*val) / sizeof (wp[i])); ++i)
59      {
60#ifdef HAVE_TTRACE
61#	warning No support for ttrace() yet.
62#else
63        /* ANDROID support update. */
64	wp[i] = ptrace (PTRACE_PEEKUSER, pid,
65			(void*) (_UPT_reg_offset[reg] + i * sizeof(wp[i])), 0);
66        /* End of ANDROID update. */
67#endif
68	if (errno)
69	  return -UNW_EBADREG;
70      }
71  return 0;
72}
73#elif HAVE_DECL_PT_GETFPREGS
74int
75_UPT_access_fpreg (unw_addr_space_t as, unw_regnum_t reg, unw_fpreg_t *val,
76		   int write, void *arg)
77{
78  struct UPT_info *ui = arg;
79  pid_t pid = ui->pid;
80  fpregset_t fpreg;
81
82  if ((unsigned) reg >= ARRAY_SIZE (_UPT_reg_offset))
83    return -UNW_EBADREG;
84
85  if (ptrace(PT_GETFPREGS, pid, (caddr_t)&fpreg, 0) == -1)
86	  return -UNW_EBADREG;
87  if (write) {
88#if defined(__amd64__)
89	  memcpy(&fpreg.fpr_xacc[reg], val, sizeof(unw_fpreg_t));
90#elif defined(__i386__)
91	  memcpy(&fpreg.fpr_acc[reg], val, sizeof(unw_fpreg_t));
92#else
93#error Fix me
94#endif
95	  if (ptrace(PT_SETFPREGS, pid, (caddr_t)&fpreg, 0) == -1)
96		  return -UNW_EBADREG;
97  } else
98#if defined(__amd64__)
99	  memcpy(val, &fpreg.fpr_xacc[reg], sizeof(unw_fpreg_t));
100#elif defined(__i386__)
101	  memcpy(val, &fpreg.fpr_acc[reg], sizeof(unw_fpreg_t));
102#else
103#error Fix me
104#endif
105  return 0;
106}
107/* ANDROID support update. */
108#elif defined(__mips__) || defined(__aarch64__)
109int
110_UPT_access_fpreg (unw_addr_space_t as, unw_regnum_t reg, unw_fpreg_t *val,
111		   int write, void *arg)
112{
113# pragma message("_UPT_access_fpreg is not implemented and not currently used.")
114  return -UNW_EBADREG;
115}
116/* End of ANDROID update. */
117#else
118#error Fix me
119#endif
120