[PPC32] First check-in to add preliminary support for Linux/PPC32.

3 files changed, 392 insertions, 0 deletions

diff --git a/include/tdep-ppc32/dwarf-config.h b/include/tdep-ppc32/dwarf-config.h
new file mode 100644
index 00000000..e2676a82
--- /dev/null
+++ b/include/tdep-ppc32/dwarf-config.h
@@ -0,0 +1,56 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2006-2007 IBM
+   Contributed by
+     Corey Ashford <cjashfor@us.ibm.com>
+     Jose Flavio Aguilar Paulino <jflavio@br.ibm.com> <joseflavio@gmail.com>
+
+   Copied from libunwind-x86_64.h, modified slightly for building
+   frysk successfully on ppc64, by Wu Zhou <woodzltc@cn.ibm.com>
+   Will be replaced when libunwind is ready on ppc64 platform.
+
+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.  */
+
+#ifndef dwarf_config_h
+#define dwarf_config_h
+
+/* For PPC64, 48 GPRs + 33 FPRs + 33 AltiVec + 1 SPE  */
+#define DWARF_NUM_PRESERVED_REGS	115
+
+#define DWARF_REGNUM_MAP_LENGTH		115
+
+/* Return TRUE if the ADDR_SPACE uses big-endian byte-order.  */
+#define dwarf_is_big_endian(addr_space) 1
+
+/* Convert a pointer to a dwarf_cursor structure to a pointer to
+   unw_cursor_t.  */
+#define dwarf_to_cursor(c)	((unw_cursor_t *) (c))
+
+typedef struct dwarf_loc
+  {
+    unw_word_t val;
+#ifndef UNW_LOCAL_ONLY
+    unw_word_t type;		/* see X86_LOC_TYPE_* macros.  */
+#endif
+  }
+dwarf_loc_t;
+
+#endif /* dwarf_config_h */
diff --git a/include/tdep-ppc32/jmpbuf.h b/include/tdep-ppc32/jmpbuf.h
new file mode 100644
index 00000000..3780d5b5
--- /dev/null
+++ b/include/tdep-ppc32/jmpbuf.h
@@ -0,0 +1,37 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2006-2007 IBM
+   Contributed by
+     Corey Ashford <cjashfor@us.ibm.com>
+     Jose Flavio Aguilar Paulino <jflavio@br.ibm.com> <joseflavio@gmail.com>
+
+   Copied from libunwind-x86_64.h, modified slightly for building
+   frysk successfully on ppc64, by Wu Zhou <woodzltc@cn.ibm.com>
+   Will be replaced when libunwind is ready on ppc64 platform.
+
+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.  */
+
+/* Use glibc's jump-buffer indices; NPTL peeks at SP: */
+
+#define JB_SP		6
+#define JB_RP		7
+#define JB_MASK_SAVED	8
+#define JB_MASK		9
diff --git a/include/tdep-ppc32/libunwind_i.h b/include/tdep-ppc32/libunwind_i.h
new file mode 100644
index 00000000..2a9f9c1b
--- /dev/null
+++ b/include/tdep-ppc32/libunwind_i.h
@@ -0,0 +1,299 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2006-2007 IBM
+   Contributed by
+     Corey Ashford <cjashfor@us.ibm.com>
+     Jose Flavio Aguilar Paulino <jflavio@br.ibm.com> <joseflavio@gmail.com>
+
+   Copied from libunwind-x86_64.h, modified slightly for building
+   frysk successfully on ppc64, by Wu Zhou <woodzltc@cn.ibm.com>
+   Will be replaced when libunwind is ready on ppc64 platform.
+
+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.  */
+
+#ifndef PPC32_LIBUNWIND_I_H
+#define PPC32_LIBUNWIND_I_H
+
+/* Target-dependent definitions that are internal to libunwind but need
+   to be shared with target-independent code.  */
+
+#include <stdlib.h>
+#include <libunwind.h>
+
+#include "elf32.h"
+#include "mempool.h"
+#include "dwarf.h"
+
+struct unw_addr_space
+{
+  struct unw_accessors acc;
+  unw_caching_policy_t caching_policy;
+#ifdef HAVE_ATOMIC_OPS_H
+  AO_t cache_generation;
+#else
+  uint32_t cache_generation;
+#endif
+  unw_word_t dyn_generation;	/* see dyn-common.h */
+  unw_word_t dyn_info_list_addr;	/* (cached) dyn_info_list_addr */
+  struct dwarf_rs_cache global_cache;
+  int validate;
+};
+
+struct cursor
+{
+  struct dwarf_cursor dwarf;	/* must be first */
+
+  /* Format of sigcontext structure and address at which it is
+     stored: */
+  enum
+  {
+    PPC_SCF_NONE,		/* no signal frame encountered */
+    PPC_SCF_LINUX_RT_SIGFRAME	/* POSIX ucontext_t */
+  }
+  sigcontext_format;
+  unw_word_t sigcontext_addr;
+};
+
+#define DWARF_GET_LOC(l)	((l).val)
+
+#ifdef UNW_LOCAL_ONLY
+# define DWARF_NULL_LOC		DWARF_LOC (0, 0)
+# define DWARF_IS_NULL_LOC(l)	(DWARF_GET_LOC (l) == 0)
+# define DWARF_LOC(r, t)	((dwarf_loc_t) { .val = (r) })
+# define DWARF_IS_REG_LOC(l)	0
+# define DWARF_IS_FP_LOC(l)	0
+# define DWARF_IS_V_LOC(l)	0
+# define DWARF_MEM_LOC(c,m)	DWARF_LOC ((m), 0)
+# define DWARF_REG_LOC(c,r)	(DWARF_LOC((unw_word_t)			     \
+				 tdep_uc_addr((c)->as_arg, (r)), 0))
+# define DWARF_FPREG_LOC(c,r)	(DWARF_LOC((unw_word_t)			     \
+				 tdep_uc_addr((c)->as_arg, (r)), 0))
+# define DWARF_VREG_LOC(c,r)	(DWARF_LOC((unw_word_t)			     \
+				 tdep_uc_addr((c)->as_arg, (r)), 0))
+#else /* !UNW_LOCAL_ONLY */
+
+# define DWARF_LOC_TYPE_FP	(1 << 0)
+# define DWARF_LOC_TYPE_REG	(1 << 1)
+# define DWARF_LOC_TYPE_V	(1 << 2)
+# define DWARF_NULL_LOC		DWARF_LOC (0, 0)
+# define DWARF_IS_NULL_LOC(l)						\
+		({ dwarf_loc_t _l = (l); _l.val == 0 && _l.type == 0; })
+# define DWARF_LOC(r, t)	((dwarf_loc_t) { .val = (r), .type = (t) })
+# define DWARF_IS_REG_LOC(l)	(((l).type & DWARF_LOC_TYPE_REG) != 0)
+# define DWARF_IS_FP_LOC(l)	(((l).type & DWARF_LOC_TYPE_FP) != 0)
+# define DWARF_IS_V_LOC(l)	(((l).type & DWARF_LOC_TYPE_V) != 0)
+# define DWARF_MEM_LOC(c,m)	DWARF_LOC ((m), 0)
+# define DWARF_REG_LOC(c,r)	DWARF_LOC((r), DWARF_LOC_TYPE_REG)
+# define DWARF_FPREG_LOC(c,r)	DWARF_LOC((r), (DWARF_LOC_TYPE_REG	\
+						| DWARF_LOC_TYPE_FP))
+# define DWARF_VREG_LOC(c,r)	DWARF_LOC((r), (DWARF_LOC_TYPE_REG	\
+						| DWARF_LOC_TYPE_V))
+
+#endif /* !UNW_LOCAL_ONLY */
+
+static inline int
+dwarf_getvr (struct dwarf_cursor *c, dwarf_loc_t loc, unw_fpreg_t * val)
+{
+  unw_word_t *valp = (unw_word_t *) val;
+  unw_word_t addr;
+  int ret;
+
+  if (DWARF_IS_NULL_LOC (loc))
+    return -UNW_EBADREG;
+
+  assert (DWARF_IS_V_LOC (loc));
+  assert (!DWARF_IS_FP_LOC (loc));
+
+  if (DWARF_IS_REG_LOC (loc))
+    return (*c->as->acc.access_fpreg) (c->as, DWARF_GET_LOC (loc),
+				      val, 0, c->as_arg);
+
+  addr = DWARF_GET_LOC (loc);
+
+  if ((ret = (*c->as->acc.access_mem) (c->as, addr + 0, valp,
+				       0, c->as_arg)) < 0)
+    return ret;
+
+  return (*c->as->acc.access_mem) (c->as, addr + 8, valp + 1, 0, c->as_arg);
+}
+
+static inline int
+dwarf_putvr (struct dwarf_cursor *c, dwarf_loc_t loc, unw_fpreg_t val)
+{
+  unw_word_t *valp = (unw_word_t *) & val;
+  unw_word_t addr;
+  int ret;
+
+  if (DWARF_IS_NULL_LOC (loc))
+    return -UNW_EBADREG;
+
+  assert (DWARF_IS_V_LOC (loc));
+  assert (!DWARF_IS_FP_LOC (loc));
+
+  if (DWARF_IS_REG_LOC (loc))
+    return (*c->as->acc.access_fpreg) (c->as, DWARF_GET_LOC (loc),
+				      &val, 1, c->as_arg);
+
+  addr = DWARF_GET_LOC (loc);
+  if ((ret = (*c->as->acc.access_mem) (c->as, addr + 0, valp,
+				       1, c->as_arg)) < 0)
+    return ret;
+
+  return (*c->as->acc.access_mem) (c->as, addr + 8, valp + 1, 1, c->as_arg);
+}
+
+static inline int
+dwarf_getfp (struct dwarf_cursor *c, dwarf_loc_t loc, unw_fpreg_t * val)
+{
+  unw_word_t *valp = (unw_word_t *) val;
+  unw_word_t addr;
+
+  if (DWARF_IS_NULL_LOC (loc))
+    return -UNW_EBADREG;
+
+  assert (DWARF_IS_FP_LOC (loc));
+  assert (!DWARF_IS_V_LOC (loc));
+
+  if (DWARF_IS_REG_LOC (loc))
+    return (*c->as->acc.access_fpreg) (c->as, DWARF_GET_LOC (loc),
+				       val, 0, c->as_arg);
+
+  addr = DWARF_GET_LOC (loc);
+  return (*c->as->acc.access_mem) (c->as, addr + 0, valp, 0, c->as_arg);
+
+}
+
+static inline int
+dwarf_putfp (struct dwarf_cursor *c, dwarf_loc_t loc, unw_fpreg_t val)
+{
+  unw_word_t *valp = (unw_word_t *) & val;
+  unw_word_t addr;
+
+  if (DWARF_IS_NULL_LOC (loc))
+    return -UNW_EBADREG;
+
+  assert (DWARF_IS_FP_LOC (loc));
+  assert (!DWARF_IS_V_LOC (loc));
+
+  if (DWARF_IS_REG_LOC (loc))
+    return (*c->as->acc.access_fpreg) (c->as, DWARF_GET_LOC (loc),
+				       &val, 1, c->as_arg);
+
+  addr = DWARF_GET_LOC (loc);
+
+  return (*c->as->acc.access_mem) (c->as, addr + 0, valp, 1, c->as_arg);
+}
+
+static inline int
+dwarf_get (struct dwarf_cursor *c, dwarf_loc_t loc, unw_word_t * val)
+{
+  if (DWARF_IS_NULL_LOC (loc))
+    return -UNW_EBADREG;
+
+  /* If a code-generator were to save a value of type unw_word_t in a
+     floating-point register, we would have to support this case.  I
+     suppose it could happen with MMX registers, but does it really
+     happen?  */
+  assert (!DWARF_IS_FP_LOC (loc));
+  assert (!DWARF_IS_V_LOC (loc));
+
+  if (DWARF_IS_REG_LOC (loc))
+    return (*c->as->acc.access_reg) (c->as, DWARF_GET_LOC (loc), val,
+				     0, c->as_arg);
+  else
+    return (*c->as->acc.access_mem) (c->as, DWARF_GET_LOC (loc), val,
+				     0, c->as_arg);
+}
+
+static inline int
+dwarf_put (struct dwarf_cursor *c, dwarf_loc_t loc, unw_word_t val)
+{
+  if (DWARF_IS_NULL_LOC (loc))
+    return -UNW_EBADREG;
+
+  /* If a code-generator were to save a value of type unw_word_t in a
+     floating-point register, we would have to support this case.  I
+     suppose it could happen with MMX registers, but does it really
+     happen?  */
+  assert (!DWARF_IS_FP_LOC (loc));
+  assert (!DWARF_IS_V_LOC (loc));
+
+  if (DWARF_IS_REG_LOC (loc))
+    return (*c->as->acc.access_reg) (c->as, DWARF_GET_LOC (loc), &val,
+				     1, c->as_arg);
+  else
+    return (*c->as->acc.access_mem) (c->as, DWARF_GET_LOC (loc), &val,
+				     1, c->as_arg);
+}
+
+
+
+#define tdep_needs_initialization	UNW_OBJ(needs_initialization)
+#define tdep_init			UNW_OBJ(init)
+/* Platforms that support UNW_INFO_FORMAT_TABLE need to define
+   tdep_search_unwind_table.  */
+#define tdep_search_unwind_table	dwarf_search_unwind_table
+#define tdep_uc_addr			UNW_ARCH_OBJ(uc_addr)
+#define tdep_get_elf_image		UNW_ARCH_OBJ(get_elf_image)
+#define tdep_access_reg			UNW_OBJ(access_reg)
+#define tdep_access_fpreg		UNW_OBJ(access_fpreg)
+#define tdep_get_func_addr		UNW_OBJ(get_func_addr)
+
+#ifdef UNW_LOCAL_ONLY
+# define tdep_find_proc_info(c,ip,n)				\
+	dwarf_find_proc_info((c)->as, (ip), &(c)->pi, (n),	\
+				       (c)->as_arg)
+# define tdep_put_unwind_info(as,pi,arg)		\
+	dwarf_put_unwind_info((as), (pi), (arg))
+#else
+# define tdep_find_proc_info(c,ip,n)					\
+	(*(c)->as->acc.find_proc_info)((c)->as, (ip), &(c)->pi, (n),	\
+				       (c)->as_arg)
+# define tdep_put_unwind_info(as,pi,arg)			\
+	(*(as)->acc.put_unwind_info)((as), (pi), (arg))
+#endif
+
+extern int tdep_fetch_proc_info_post (struct dwarf_cursor *c, unw_word_t ip,
+				      int need_unwind_info);
+
+#define tdep_get_as(c)			((c)->dwarf.as)
+#define tdep_get_as_arg(c)		((c)->dwarf.as_arg)
+#define tdep_get_ip(c)			((c)->dwarf.ip)
+#define tdep_big_endian(as)		1
+
+extern int tdep_needs_initialization;
+
+extern void tdep_init (void);
+extern int tdep_search_unwind_table (unw_addr_space_t as, unw_word_t ip,
+				     unw_dyn_info_t * di,
+				     unw_proc_info_t * pi,
+				     int need_unwind_info, void *arg);
+extern void *tdep_uc_addr (ucontext_t * uc, int reg);
+extern int tdep_get_elf_image (struct elf_image *ei, pid_t pid, unw_word_t ip,
+			       unsigned long *segbase, unsigned long *mapoff);
+extern int tdep_access_reg (struct cursor *c, unw_regnum_t reg,
+			    unw_word_t * valp, int write);
+extern int tdep_access_fpreg (struct cursor *c, unw_regnum_t reg,
+			      unw_fpreg_t * valp, int write);
+extern int tdep_get_func_addr (unw_addr_space_t as, unw_word_t addr,
+			       unw_word_t *entry_point);
+
+#endif /* PPC64_LIBUNWIND_I_H */