SERVER-33259 add libunwind to third_party

1 files changed, 210 insertions, 0 deletions

diff --git a/src/third_party/unwind/dist/src/mips/Ginit.c b/src/third_party/unwind/dist/src/mips/Ginit.c
new file mode 100644
index 00000000000..3df170c7549
--- /dev/null
+++ b/src/third_party/unwind/dist/src/mips/Ginit.c
@@ -0,0 +1,210 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2008 CodeSourcery
+
+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 <string.h>
+
+#include "unwind_i.h"
+
+#ifdef UNW_REMOTE_ONLY
+
+/* unw_local_addr_space is a NULL pointer in this case.  */
+unw_addr_space_t unw_local_addr_space;
+
+#else /* !UNW_REMOTE_ONLY */
+
+static struct unw_addr_space local_addr_space;
+
+unw_addr_space_t unw_local_addr_space = &local_addr_space;
+
+/* Return the address of the 64-bit slot in UC for REG (even for o32,
+   where registers are 32-bit, the slots are still 64-bit).  */
+
+static inline void *
+uc_addr (ucontext_t *uc, int reg)
+{
+  if (reg >= UNW_MIPS_R0 && reg < UNW_MIPS_R0 + 32)
+    return &uc->uc_mcontext.gregs[reg - UNW_MIPS_R0];
+  else if (reg == UNW_MIPS_PC)
+    return &uc->uc_mcontext.pc;
+  else
+    return NULL;
+}
+
+# ifdef UNW_LOCAL_ONLY
+
+HIDDEN void *
+tdep_uc_addr (ucontext_t *uc, int reg)
+{
+  char *addr = uc_addr (uc, reg);
+
+  if (((reg >= UNW_MIPS_R0 && reg <= UNW_MIPS_R31) || reg == UNW_MIPS_PC)
+      && tdep_big_endian (unw_local_addr_space)
+      && unw_local_addr_space->abi == UNW_MIPS_ABI_O32)
+    addr += 4;
+
+  return addr;
+}
+
+# endif /* UNW_LOCAL_ONLY */
+
+HIDDEN unw_dyn_info_list_t _U_dyn_info_list;
+
+/* XXX fix me: there is currently no way to locate the dyn-info list
+       by a remote unwinder.  On ia64, this is done via a special
+       unwind-table entry.  Perhaps something similar can be done with
+       DWARF2 unwind info.  */
+
+static void
+put_unwind_info (unw_addr_space_t as, unw_proc_info_t *proc_info, void *arg)
+{
+  /* it's a no-op */
+}
+
+static int
+get_dyn_info_list_addr (unw_addr_space_t as, unw_word_t *dyn_info_list_addr,
+                        void *arg)
+{
+  *dyn_info_list_addr = (unw_word_t) (intptr_t) &_U_dyn_info_list;
+  return 0;
+}
+
+static int
+access_mem (unw_addr_space_t as, unw_word_t addr, unw_word_t *val, int write,
+            void *arg)
+{
+  if (write)
+    {
+      Debug (16, "mem[%llx] <- %llx\n", (long long) addr, (long long) *val);
+      *(unw_word_t *) (intptr_t) addr = *val;
+    }
+  else
+    {
+      *val = *(unw_word_t *) (intptr_t) addr;
+      Debug (16, "mem[%llx] -> %llx\n", (long long) addr, (long long) *val);
+    }
+  return 0;
+}
+
+static int
+access_reg (unw_addr_space_t as, unw_regnum_t reg, unw_word_t *val, int write,
+            void *arg)
+{
+  unw_word_t *addr;
+  ucontext_t *uc = arg;
+
+  if (unw_is_fpreg (reg))
+    goto badreg;
+
+  Debug (16, "reg = %s\n", unw_regname (reg));
+  if (!(addr = uc_addr (uc, reg)))
+    goto badreg;
+
+  if (write)
+    {
+      *(unw_word_t *) (intptr_t) addr = (mips_reg_t) *val;
+      Debug (12, "%s <- %llx\n", unw_regname (reg), (long long) *val);
+    }
+  else
+    {
+      *val = (mips_reg_t) *(unw_word_t *) (intptr_t) addr;
+      Debug (12, "%s -> %llx\n", unw_regname (reg), (long long) *val);
+    }
+  return 0;
+
+ badreg:
+  Debug (1, "bad register number %u\n", reg);
+  return -UNW_EBADREG;
+}
+
+static int
+access_fpreg (unw_addr_space_t as, unw_regnum_t reg, unw_fpreg_t *val,
+              int write, void *arg)
+{
+  ucontext_t *uc = arg;
+  unw_fpreg_t *addr;
+
+  if (!unw_is_fpreg (reg))
+    goto badreg;
+
+  if (!(addr = uc_addr (uc, reg)))
+    goto badreg;
+
+  if (write)
+    {
+      Debug (12, "%s <- %08lx.%08lx.%08lx\n", unw_regname (reg),
+             ((long *)val)[0], ((long *)val)[1], ((long *)val)[2]);
+      *(unw_fpreg_t *) (intptr_t) addr = *val;
+    }
+  else
+    {
+      *val = *(unw_fpreg_t *) (intptr_t) addr;
+      Debug (12, "%s -> %08lx.%08lx.%08lx\n", unw_regname (reg),
+             ((long *)val)[0], ((long *)val)[1], ((long *)val)[2]);
+    }
+  return 0;
+
+ badreg:
+  Debug (1, "bad register number %u\n", reg);
+  /* attempt to access a non-preserved register */
+  return -UNW_EBADREG;
+}
+
+static int
+get_static_proc_name (unw_addr_space_t as, unw_word_t ip,
+                      char *buf, size_t buf_len, unw_word_t *offp,
+                      void *arg)
+{
+
+  return elf_w (get_proc_name) (as, getpid (), ip, buf, buf_len, offp);
+}
+
+HIDDEN void
+mips_local_addr_space_init (void)
+{
+  memset (&local_addr_space, 0, sizeof (local_addr_space));
+  local_addr_space.big_endian = (__BYTE_ORDER == __BIG_ENDIAN);
+#if _MIPS_SIM == _ABIO32
+  local_addr_space.abi = UNW_MIPS_ABI_O32;
+#elif _MIPS_SIM == _ABIN32
+  local_addr_space.abi = UNW_MIPS_ABI_N32;
+#elif _MIPS_SIM == _ABI64
+  local_addr_space.abi = UNW_MIPS_ABI_N64;
+#else
+# error Unsupported ABI
+#endif
+  local_addr_space.addr_size = sizeof (void *);
+  local_addr_space.caching_policy = UNWI_DEFAULT_CACHING_POLICY;
+  local_addr_space.acc.find_proc_info = dwarf_find_proc_info;
+  local_addr_space.acc.put_unwind_info = put_unwind_info;
+  local_addr_space.acc.get_dyn_info_list_addr = get_dyn_info_list_addr;
+  local_addr_space.acc.access_mem = access_mem;
+  local_addr_space.acc.access_reg = access_reg;
+  local_addr_space.acc.access_fpreg = access_fpreg;
+  local_addr_space.acc.resume = NULL;  /* mips_local_resume?  FIXME!  */
+  local_addr_space.acc.get_proc_name = get_static_proc_name;
+  unw_flush_cache (&local_addr_space, 0, 0);
+}
+
+#endif /* !UNW_REMOTE_ONLY */