setjmp_i.h revision a369768c279654ae247643f81e0d2f6f7ddd4d15 
1<<<<<<< .merge_file_NH3KvZ
2/* libunwind - a platform-independent unwind library
3   Copyright (C) 2003-2005 Hewlett-Packard Co
4	Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
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#if UNW_TARGET_IA64
28
29#include "libunwind_i.h"
30#include "tdep-ia64/rse.h"
31
32static inline int
33bsp_match (unw_cursor_t *c, unw_word_t *wp)
34{
35  unw_word_t bsp, pfs, sol;
36
37  if (unw_get_reg (c, UNW_IA64_BSP, &bsp) < 0
38      || unw_get_reg (c, UNW_IA64_AR_PFS, &pfs) < 0)
39    abort ();
40
41  /* simulate the effect of "br.call sigsetjmp" on ar.bsp: */
42  sol = (pfs >> 7) & 0x7f;
43  bsp = rse_skip_regs (bsp, sol);
44
45  if (bsp != wp[JB_BSP])
46    return 0;
47
48  if (unlikely (sol == 0))
49    {
50      unw_word_t sp, prev_sp;
51      unw_cursor_t tmp = *c;
52
53      /* The caller of {sig,}setjmp() cannot have a NULL-frame.  If we
54	 see a NULL-frame, we haven't reached the right target yet.
55	 To have a NULL-frame, the number of locals must be zero and
56	 the stack-frame must also be empty.  */
57
58      if (unw_step (&tmp) < 0)
59	abort ();
60
61      if (unw_get_reg (&tmp, UNW_REG_SP, &sp) < 0
62	  || unw_get_reg (&tmp, UNW_REG_SP, &prev_sp) < 0)
63	abort ();
64
65      if (sp == prev_sp)
66	/* got a NULL-frame; keep looking... */
67	return 0;
68    }
69  return 1;
70}
71
72/* On ia64 we cannot always call sigprocmask() at
73   _UI_siglongjmp_cont() because the signal may have switched stacks
74   and the old stack's register-backing store may have overflown,
75   leaving us no space to allocate the stacked registers needed to
76   call sigprocmask().  Fortunately, we can just let unw_resume() (via
77   sigreturn) take care of restoring the signal-mask.  That's faster
78   anyhow.  */
79static inline int
80resume_restores_sigmask (unw_cursor_t *c, unw_word_t *wp)
81{
82  unw_word_t sc_addr = ((struct cursor *) c)->sigcontext_addr;
83  struct sigcontext *sc = (struct sigcontext *) sc_addr;
84  sigset_t current_mask;
85  void *mp;
86
87  if (!sc_addr)
88    return 0;
89
90  /* let unw_resume() install the desired signal mask */
91
92  if (wp[JB_MASK_SAVED])
93    mp = &wp[JB_MASK];
94  else
95    {
96      if (sigprocmask (SIG_BLOCK, NULL, &current_mask) < 0)
97	abort ();
98      mp = &current_mask;
99    }
100  memcpy (&sc->sc_mask, mp, sizeof (sc->sc_mask));
101  return 1;
102}
103
104#else /* !UNW_TARGET_IA64 */
105
106static inline int
107bsp_match (unw_cursor_t *c, unw_word_t *wp)
108{
109  return 1;
110}
111
112static inline int
113resume_restores_sigmask (unw_cursor_t *c, unw_word_t *wp)
114{
115  /* We may want to do this analogously as for ia64... */
116  return 0;
117}
118
119#endif /* !UNW_TARGET_IA64 */
120=======
121/* libunwind - a platform-independent unwind library
122   Copyright (C) 2003-2005 Hewlett-Packard Co
123	Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
124
125This file is part of libunwind.
126
127Permission is hereby granted, free of charge, to any person obtaining
128a copy of this software and associated documentation files (the
129"Software"), to deal in the Software without restriction, including
130without limitation the rights to use, copy, modify, merge, publish,
131distribute, sublicense, and/or sell copies of the Software, and to
132permit persons to whom the Software is furnished to do so, subject to
133the following conditions:
134
135The above copyright notice and this permission notice shall be
136included in all copies or substantial portions of the Software.
137
138THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
139EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
140MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
141NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
142LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
143OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
144WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
145
146#if UNW_TARGET_IA64
147
148#include "tdep.h"
149#include "ia64/rse.h"
150
151static inline int
152bsp_match (unw_cursor_t *c, unw_word_t *wp)
153{
154  unw_word_t bsp, pfs, sol;
155
156  if (unw_get_reg (c, UNW_IA64_BSP, &bsp) < 0
157      || unw_get_reg (c, UNW_IA64_AR_PFS, &pfs) < 0)
158    abort ();
159
160  /* simulate the effect of "br.call sigsetjmp" on ar.bsp: */
161  sol = (pfs >> 7) & 0x7f;
162  bsp = rse_skip_regs (bsp, sol);
163
164  if (bsp != wp[JB_BSP])
165    return 0;
166
167  if (unlikely (sol == 0))
168    {
169      unw_word_t sp, prev_sp;
170      unw_cursor_t tmp = *c;
171
172      /* The caller of {sig,}setjmp() cannot have a NULL-frame.  If we
173	 see a NULL-frame, we haven't reached the right target yet.
174	 To have a NULL-frame, the number of locals must be zero and
175	 the stack-frame must also be empty.  */
176
177      if (unw_step (&tmp) < 0)
178	abort ();
179
180      if (unw_get_reg (&tmp, UNW_REG_SP, &sp) < 0
181	  || unw_get_reg (&tmp, UNW_REG_SP, &prev_sp) < 0)
182	abort ();
183
184      if (sp == prev_sp)
185	/* got a NULL-frame; keep looking... */
186	return 0;
187    }
188  return 1;
189}
190
191/* On ia64 we cannot always call sigprocmask() at
192   _UI_siglongjmp_cont() because the signal may have switched stacks
193   and the old stack's register-backing store may have overflown,
194   leaving us no space to allocate the stacked registers needed to
195   call sigprocmask().  Fortunately, we can just let unw_resume() (via
196   sigreturn) take care of restoring the signal-mask.  That's faster
197   anyhow.  */
198static inline int
199resume_restores_sigmask (unw_cursor_t *c, unw_word_t *wp)
200{
201  unw_word_t sc_addr = ((struct cursor *) c)->sigcontext_addr;
202  struct sigcontext *sc = (struct sigcontext *) sc_addr;
203  sigset_t current_mask;
204  void *mp;
205
206  if (!sc_addr)
207    return 0;
208
209  /* let unw_resume() install the desired signal mask */
210
211  if (wp[JB_MASK_SAVED])
212    mp = &wp[JB_MASK];
213  else
214    {
215      if (sigprocmask (SIG_BLOCK, NULL, &current_mask) < 0)
216	abort ();
217      mp = &current_mask;
218    }
219  memcpy (&sc->sc_mask, mp, sizeof (sc->sc_mask));
220  return 1;
221}
222
223#else /* !UNW_TARGET_IA64 */
224
225static inline int
226bsp_match (unw_cursor_t *c, unw_word_t *wp)
227{
228  return 1;
229}
230
231static inline int
232resume_restores_sigmask (unw_cursor_t *c, unw_word_t *wp)
233{
234  /* We may want to do this analogously as for ia64... */
235  return 0;
236}
237
238#endif /* !UNW_TARGET_IA64 */
239>>>>>>> .merge_file_F6t3ZY
240