Rename: src/ia64/Gresume-ia64.c -> src/ia64/Gresume.c
(Logical change 1.241)
diff --git a/src/ia64/Gresume.c b/src/ia64/Gresume.c
new file mode 100644
index 0000000..e36fb34
--- /dev/null
+++ b/src/ia64/Gresume.c
@@ -0,0 +1,267 @@
+/* libunwind - a platform-independent unwind library
+ Copyright (C) 2001-2004 Hewlett-Packard Co
+ Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
+
+#include <stdlib.h>
+
+#include "unwind_i.h"
+#include "offsets.h"
+
+#ifndef UNW_REMOTE_ONLY
+
+static inline int
+local_resume (unw_addr_space_t as, unw_cursor_t *cursor, void *arg)
+{
+#if defined(__linux)
+ unw_word_t val, sol, sof, pri_unat, n, pfs;
+ struct cursor *c = (struct cursor *) cursor;
+ struct
+ {
+ unw_word_t r1;
+ unw_word_t r4;
+ unw_word_t r5;
+ unw_word_t r6;
+ unw_word_t r7;
+ unw_word_t r15;
+ unw_word_t r16;
+ unw_word_t r17;
+ unw_word_t r18;
+ }
+ extra;
+ int ret;
+# define GET_NAT(n) \
+ do \
+ { \
+ ret = tdep_access_reg (c, UNW_IA64_NAT + (n), &val, 0); \
+ if (ret < 0) \
+ return ret; \
+ if (val) \
+ pri_unat |= (unw_word_t) 1 << n; \
+ } \
+ while (0)
+
+ /* ensure c->pi is up-to-date: */
+ if ((ret = ia64_make_proc_info (c)) < 0)
+ return ret;
+
+ /* Copy contents of r4-r7 into "extra", so that their values end up
+ contiguous, so we can use a single (primary-) UNaT value. */
+ if ((ret = ia64_get (c, c->loc[IA64_REG_R4], &extra.r4)) < 0
+ || (ret = ia64_get (c, c->loc[IA64_REG_R5], &extra.r5)) < 0
+ || (ret = ia64_get (c, c->loc[IA64_REG_R6], &extra.r6)) < 0
+ || (ret = ia64_get (c, c->loc[IA64_REG_R7], &extra.r7)) < 0)
+ return ret;
+
+ /* Form the primary UNaT value: */
+ pri_unat = 0;
+ GET_NAT (4); GET_NAT(5);
+ GET_NAT (6); GET_NAT(7);
+ n = (((uintptr_t) &extra.r4) / 8 - 4) % 64;
+ pri_unat = (pri_unat << n) | (pri_unat >> (64 - n));
+
+ if (unlikely (c->sigcontext_addr))
+ {
+ struct sigcontext *sc = (struct sigcontext *) c->sigcontext_addr;
+# define PR_SCRATCH 0xffc0 /* p6-p15 are scratch */
+# define PR_PRESERVED (~(PR_SCRATCH | 1))
+
+ /* We're returning to a frame that was (either directly or
+ indirectly) interrupted by a signal. We have to restore
+ _both_ "preserved" and "scratch" registers. That doesn't
+ leave us any registers to work with, and the only way we can
+ achieve this is by doing a sigreturn().
+
+ Note: it might be tempting to think that we don't have to
+ restore the scratch registers when returning to a frame that
+ was indirectly interrupted by a signal. However, that is not
+ safe because that frame and its descendants could have been
+ using a special convention that stores "preserved" state in
+ scratch registers. For example, the Linux fsyscall
+ convention does this with r11 (to save ar.pfs) and b6 (to
+ save "rp"). */
+
+ sc->sc_gr[12] = c->psp;
+ c->psp = c->sigcontext_addr - c->sigcontext_off;
+
+ sof = (c->cfm & 0x7f);
+ rbs_cover_and_flush (c, sof);
+
+ /* Clear the "in-syscall" flag, because in general we won't be
+ returning to the interruption-point and we need all registers
+ restored. */
+ sc->sc_flags &= ~IA64_SC_FLAG_IN_SYSCALL;
+ sc->sc_ip = c->ip;
+ sc->sc_cfm = c->cfm & (((unw_word_t) 1 << 38) - 1);
+ sc->sc_pr = (c->pr & ~PR_SCRATCH) | (sc->sc_pr & ~PR_PRESERVED);
+ if ((ret = ia64_get (c, c->loc[IA64_REG_PFS], &sc->sc_ar_pfs)) < 0
+ || (ret = ia64_get (c, c->loc[IA64_REG_FPSR], &sc->sc_ar_fpsr)) < 0
+ || (ret = ia64_get (c, c->loc[IA64_REG_UNAT], &sc->sc_ar_unat)) < 0)
+ return ret;
+
+ sc->sc_gr[1] = c->pi.gp;
+ if (c->eh_valid_mask & 0x1) sc->sc_gr[15] = c->eh_args[0];
+ if (c->eh_valid_mask & 0x2) sc->sc_gr[16] = c->eh_args[1];
+ if (c->eh_valid_mask & 0x4) sc->sc_gr[17] = c->eh_args[2];
+ if (c->eh_valid_mask & 0x8) sc->sc_gr[18] = c->eh_args[3];
+ Debug (9, "sc: r15=%lx,r16=%lx,r17=%lx,r18=%lx\n",
+ (long) sc->sc_gr[15], (long) sc->sc_gr[16],
+ (long) sc->sc_gr[17], (long) sc->sc_gr[18]);
+ }
+ else
+ {
+ /* Account for the fact that _Uia64_install_context() will
+ return via br.ret, which will decrement bsp by size-of-locals. */
+ if ((ret = ia64_get (c, c->loc[IA64_REG_PFS], &pfs)) < 0)
+ return ret;
+ sol = (pfs >> 7) & 0x7f;
+ rbs_cover_and_flush (c, sol);
+
+ extra.r1 = c->pi.gp;
+ extra.r15 = c->eh_args[0];
+ extra.r16 = c->eh_args[1];
+ extra.r17 = c->eh_args[2];
+ extra.r18 = c->eh_args[3];
+ Debug (9, "extra: r15=%lx,r16=%lx,r17=%lx,r18=%lx\n",
+ (long) extra.r15, (long) extra.r16,
+ (long) extra.r17, (long) extra.r18);
+ }
+ Debug (8, "resuming at ip=%lx\n", (long) c->ip);
+ ia64_install_cursor (c, pri_unat, (unw_word_t *) &extra);
+#elif defined(__hpux)
+ struct cursor *c = (struct cursor *) cursor;
+
+ setcontext (c->as_arg); /* should not return */
+#endif
+ return -UNW_EINVAL;
+}
+
+HIDDEN int
+ia64_local_resume (unw_addr_space_t as, unw_cursor_t *cursor, void *arg)
+{
+ return local_resume (as, cursor, arg);
+}
+
+#endif /* !UNW_REMOTE_ONLY */
+
+#ifndef UNW_LOCAL_ONLY
+
+static inline int
+remote_install_cursor (struct cursor *c)
+{
+ int (*access_reg) (unw_addr_space_t, unw_regnum_t, unw_word_t *,
+ int write, void *);
+ int (*access_fpreg) (unw_addr_space_t, unw_regnum_t, unw_fpreg_t *,
+ int write, void *);
+ unw_fpreg_t fpval;
+ unw_word_t val;
+ int reg;
+
+#if defined(__linux) && !defined(UNW_REMOTE_ONLY)
+ if (c->as == unw_local_addr_space)
+ {
+ /* Take a short-cut: we directly resume out of the cursor and
+ all we need to do is make sure that all locations point to
+ memory, not registers. Furthermore, R4-R7 and NAT4-NAT7 are
+ taken care of by ia64_local_resume() so they don't need to be
+ handled here. */
+# define MEMIFY(preg, reg) \
+ do { \
+ if (IA64_IS_REG_LOC (c->loc[(preg)])) \
+ c->loc[(preg)] = IA64_LOC_ADDR ((unw_word_t) \
+ tdep_uc_addr(c->as_arg, (reg), \
+ NULL), 0); \
+ } while (0)
+ MEMIFY (IA64_REG_PR, UNW_IA64_PR);
+ MEMIFY (IA64_REG_PFS, UNW_IA64_AR_PFS);
+ MEMIFY (IA64_REG_RNAT, UNW_IA64_AR_RNAT);
+ MEMIFY (IA64_REG_UNAT, UNW_IA64_AR_UNAT);
+ MEMIFY (IA64_REG_LC, UNW_IA64_AR_LC);
+ MEMIFY (IA64_REG_FPSR, UNW_IA64_AR_FPSR);
+ MEMIFY (IA64_REG_IP, UNW_IA64_BR + 0);
+ MEMIFY (IA64_REG_B1, UNW_IA64_BR + 1);
+ MEMIFY (IA64_REG_B2, UNW_IA64_BR + 2);
+ MEMIFY (IA64_REG_B3, UNW_IA64_BR + 3);
+ MEMIFY (IA64_REG_B4, UNW_IA64_BR + 4);
+ MEMIFY (IA64_REG_B5, UNW_IA64_BR + 5);
+ MEMIFY (IA64_REG_F2, UNW_IA64_FR + 2);
+ MEMIFY (IA64_REG_F3, UNW_IA64_FR + 3);
+ MEMIFY (IA64_REG_F4, UNW_IA64_FR + 4);
+ MEMIFY (IA64_REG_F5, UNW_IA64_FR + 5);
+ MEMIFY (IA64_REG_F16, UNW_IA64_FR + 16);
+ MEMIFY (IA64_REG_F17, UNW_IA64_FR + 17);
+ MEMIFY (IA64_REG_F18, UNW_IA64_FR + 18);
+ MEMIFY (IA64_REG_F19, UNW_IA64_FR + 19);
+ MEMIFY (IA64_REG_F20, UNW_IA64_FR + 20);
+ MEMIFY (IA64_REG_F21, UNW_IA64_FR + 21);
+ MEMIFY (IA64_REG_F22, UNW_IA64_FR + 22);
+ MEMIFY (IA64_REG_F23, UNW_IA64_FR + 23);
+ MEMIFY (IA64_REG_F24, UNW_IA64_FR + 24);
+ MEMIFY (IA64_REG_F25, UNW_IA64_FR + 25);
+ MEMIFY (IA64_REG_F26, UNW_IA64_FR + 26);
+ MEMIFY (IA64_REG_F27, UNW_IA64_FR + 27);
+ MEMIFY (IA64_REG_F28, UNW_IA64_FR + 28);
+ MEMIFY (IA64_REG_F29, UNW_IA64_FR + 29);
+ MEMIFY (IA64_REG_F30, UNW_IA64_FR + 30);
+ MEMIFY (IA64_REG_F31, UNW_IA64_FR + 31);
+ }
+ else
+#endif /* __linux && !UNW_REMOTE_ONLY */
+ {
+ access_reg = c->as->acc.access_reg;
+ access_fpreg = c->as->acc.access_fpreg;
+
+ Debug (8, "copying out cursor state\n");
+
+ for (reg = 0; reg < UNW_REG_LAST; ++reg)
+ {
+ if (unw_is_fpreg (reg))
+ {
+ if (tdep_access_fpreg (c, reg, &fpval, 0) >= 0)
+ (*access_fpreg) (c->as, reg, &fpval, 1, c->as_arg);
+ }
+ else
+ {
+ if (tdep_access_reg (c, reg, &val, 0) >= 0)
+ (*access_reg) (c->as, reg, &val, 1, c->as_arg);
+ }
+ }
+ }
+ return (*c->as->acc.resume) (c->as, (unw_cursor_t *) c, c->as_arg);
+}
+
+#endif /* !UNW_LOCAL_ONLY */
+
+PROTECTED int
+unw_resume (unw_cursor_t *cursor)
+{
+ struct cursor *c = (struct cursor *) cursor;
+
+ Debug (2, "(cursor=%p)\n", c);
+
+#ifdef UNW_LOCAL_ONLY
+ return local_resume (c->as, cursor, c->as_arg);
+#else
+ return remote_install_cursor (c);
+#endif
+}