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authorMichael Snyder <msnyder@vmware.com>2005-03-21 19:31:46 +0000
committerMichael Snyder <msnyder@vmware.com>2005-03-21 19:31:46 +0000
commit342ee437fbe9b0b8fbcad41e44649e877da7bc7d (patch)
tree64776b0591de8754c9ee75b498668893e3ea5317 /gdb
parent4f0d78e096522c9deaaaf10bf7270a7f8a163798 (diff)
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2005-03-21 Michael Snyder <msnyder@redhat.com>
* mn10300-tdep.c (mn10300_frame_unwind_cache): Use func addr instead of pc addr for frame_id. Otherwise "until" won't work.
Diffstat (limited to 'gdb')
-rw-r--r--gdb/ChangeLog5
-rw-r--r--gdb/mn10300-tdep.c1191
2 files changed, 601 insertions, 595 deletions
diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index e56efad..5836fe2 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,8 @@
+2005-03-21 Michael Snyder <msnyder@redhat.com>
+
+ * mn10300-tdep.c (mn10300_frame_unwind_cache): Use func addr
+ instead of pc addr for frame_id. Otherwise "until" won't work.
+
2005-03-21 Kevin Buettner <kevinb@redhat.com>
* frv-linux-tdep.c (frv_linux_sigcontext_reg_addr): Fix typo in
diff --git a/gdb/mn10300-tdep.c b/gdb/mn10300-tdep.c
index cdb1cdc..bfa4092 100644
--- a/gdb/mn10300-tdep.c
+++ b/gdb/mn10300-tdep.c
@@ -1,595 +1,596 @@
-/* Target-dependent code for the Matsushita MN10300 for GDB, the GNU debugger.
-
- Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004 Free
- Software Foundation, Inc.
-
- This file is part of GDB.
-
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
-
-/* MVS Notes:
-
- To get from 1.1 to 1.2, add:
- use_struct_convention
- store_return_value
- extract_return_value
- extract_struct_value_address
-
- Make sure to use regcache. */
-
-/* MVS Notes:
-
- Apparently cannot run without a stub placeholder for unwind_dummy_id.
-*/
-
-/* MVS Notes:
-
- To get from 1.2 to 1.3, add:
- read_pc, write_pc
- frame_unwind_init
- struct mn10300_unwind_cache
- unwind_pc
- unwind_dummy_id
- frame_this_id
- frame_prev_register
- frame_sniffer (struct mn10300_frame_unwind)
-*/
-
-#include "defs.h"
-#include "arch-utils.h"
-#include "dis-asm.h"
-#include "gdbtypes.h"
-#include "regcache.h"
-#include "gdb_string.h"
-#include "gdb_assert.h"
-#include "gdbcore.h" /* for write_memory_unsigned_integer */
-#include "value.h"
-#include "gdbtypes.h"
-#include "frame.h"
-#include "frame-unwind.h"
-#include "frame-base.h"
-#include "trad-frame.h"
-#include "symtab.h"
-#include "dwarf2-frame.h"
-#include "regcache.h"
-
-#include "mn10300-tdep.h"
-
-
-/* Compute the alignment required by a type. */
-
-static int
-mn10300_type_align (struct type *type)
-{
- int i, align = 1;
-
- switch (TYPE_CODE (type))
- {
- case TYPE_CODE_INT:
- case TYPE_CODE_ENUM:
- case TYPE_CODE_SET:
- case TYPE_CODE_RANGE:
- case TYPE_CODE_CHAR:
- case TYPE_CODE_BOOL:
- case TYPE_CODE_FLT:
- case TYPE_CODE_PTR:
- case TYPE_CODE_REF:
- return TYPE_LENGTH (type);
-
- case TYPE_CODE_COMPLEX:
- return TYPE_LENGTH (type) / 2;
-
- case TYPE_CODE_STRUCT:
- case TYPE_CODE_UNION:
- for (i = 0; i < TYPE_NFIELDS (type); i++)
- {
- int falign = mn10300_type_align (TYPE_FIELD_TYPE (type, i));
- while (align < falign)
- align <<= 1;
- }
- return align;
-
- case TYPE_CODE_ARRAY:
- /* HACK! Structures containing arrays, even small ones, are not
- elligible for returning in registers. */
- return 256;
-
- case TYPE_CODE_TYPEDEF:
- return mn10300_type_align (check_typedef (type));
-
- default:
- internal_error (__FILE__, __LINE__, _("bad switch"));
- }
-}
-
-/* MVS note this is deprecated. */
-/* Should call_function allocate stack space for a struct return? */
-/* gcc_p unused */
-static int
-mn10300_use_struct_convention (int gcc_p, struct type *type)
-{
- /* Structures bigger than a pair of words can't be returned in
- registers. */
- if (TYPE_LENGTH (type) > 8)
- return 1;
-
- switch (TYPE_CODE (type))
- {
- case TYPE_CODE_STRUCT:
- case TYPE_CODE_UNION:
- /* Structures with a single field are handled as the field
- itself. */
- if (TYPE_NFIELDS (type) == 1)
- return mn10300_use_struct_convention (gcc_p,
- TYPE_FIELD_TYPE (type, 0));
-
- /* Structures with word or double-word size are passed in memory, as
- long as they require at least word alignment. */
- if (mn10300_type_align (type) >= 4)
- return 0;
-
- return 1;
-
- /* Arrays are addressable, so they're never returned in
- registers. This condition can only hold when the array is
- the only field of a struct or union. */
- case TYPE_CODE_ARRAY:
- return 1;
-
- case TYPE_CODE_TYPEDEF:
- return mn10300_use_struct_convention (gcc_p, check_typedef (type));
-
- default:
- return 0;
- }
-}
-
-/* MVS note this is deprecated. */
-static void
-mn10300_store_return_value (struct type *type,
- struct regcache *regcache, const void *valbuf)
-{
- struct gdbarch *gdbarch = get_regcache_arch (regcache);
- int len = TYPE_LENGTH (type);
- int reg, regsz;
-
- if (TYPE_CODE (type) == TYPE_CODE_PTR)
- reg = 4;
- else
- reg = 0;
-
- regsz = register_size (gdbarch, reg);
-
- if (len <= regsz)
- regcache_raw_write_part (regcache, reg, 0, len, valbuf);
- else if (len <= 2 * regsz)
- {
- regcache_raw_write (regcache, reg, valbuf);
- gdb_assert (regsz == register_size (gdbarch, reg + 1));
- regcache_raw_write_part (regcache, reg+1, 0,
- len - regsz, (char *) valbuf + regsz);
- }
- else
- internal_error (__FILE__, __LINE__,
- _("Cannot store return value %d bytes long."), len);
-}
-
-/* MVS note deprecated. */
-static void
-mn10300_extract_return_value (struct type *type,
- struct regcache *regcache, void *valbuf)
-{
- struct gdbarch *gdbarch = get_regcache_arch (regcache);
- char buf[MAX_REGISTER_SIZE];
- int len = TYPE_LENGTH (type);
- int reg, regsz;
-
- if (TYPE_CODE (type) == TYPE_CODE_PTR)
- reg = 4;
- else
- reg = 0;
-
- regsz = register_size (gdbarch, reg);
- if (len <= regsz)
- {
- regcache_raw_read (regcache, reg, buf);
- memcpy (valbuf, buf, len);
- }
- else if (len <= 2 * regsz)
- {
- regcache_raw_read (regcache, reg, buf);
- memcpy (valbuf, buf, regsz);
- gdb_assert (regsz == register_size (gdbarch, reg + 1));
- regcache_raw_read (regcache, reg + 1, buf);
- memcpy ((char *) valbuf + regsz, buf, len - regsz);
- }
- else
- internal_error (__FILE__, __LINE__,
- _("Cannot extract return value %d bytes long."), len);
-}
-
-static char *
-register_name (int reg, char **regs, long sizeof_regs)
-{
- if (reg < 0 || reg >= sizeof_regs / sizeof (regs[0]))
- return NULL;
- else
- return regs[reg];
-}
-
-static const char *
-mn10300_generic_register_name (int reg)
-{
- static char *regs[] =
- { "d0", "d1", "d2", "d3", "a0", "a1", "a2", "a3",
- "sp", "pc", "mdr", "psw", "lir", "lar", "", "",
- "", "", "", "", "", "", "", "",
- "", "", "", "", "", "", "", "fp"
- };
- return register_name (reg, regs, sizeof regs);
-}
-
-
-static const char *
-am33_register_name (int reg)
-{
- static char *regs[] =
- { "d0", "d1", "d2", "d3", "a0", "a1", "a2", "a3",
- "sp", "pc", "mdr", "psw", "lir", "lar", "",
- "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
- "ssp", "msp", "usp", "mcrh", "mcrl", "mcvf", "", "", ""
- };
- return register_name (reg, regs, sizeof regs);
-}
-
-
-static struct type *
-mn10300_register_type (struct gdbarch *gdbarch, int reg)
-{
- return builtin_type_int;
-}
-
-static CORE_ADDR
-mn10300_read_pc (ptid_t ptid)
-{
- return read_register_pid (E_PC_REGNUM, ptid);
-}
-
-static void
-mn10300_write_pc (CORE_ADDR val, ptid_t ptid)
-{
- return write_register_pid (E_PC_REGNUM, val, ptid);
-}
-
-/* The breakpoint instruction must be the same size as the smallest
- instruction in the instruction set.
-
- The Matsushita mn10x00 processors have single byte instructions
- so we need a single byte breakpoint. Matsushita hasn't defined
- one, so we defined it ourselves. */
-
-const static unsigned char *
-mn10300_breakpoint_from_pc (CORE_ADDR *bp_addr, int *bp_size)
-{
- static char breakpoint[] = {0xff};
- *bp_size = 1;
- return breakpoint;
-}
-
-/* Function: skip_prologue
- Return the address of the first inst past the prologue of the function. */
-
-static CORE_ADDR
-mn10300_skip_prologue (CORE_ADDR pc)
-{
- /* FIXME: not implemented. */
- /* First approximation, try simply using skip_prologue_using_sal. */
- return skip_prologue_using_sal (pc);
-}
-
-/* Simple frame_unwind_cache.
- This finds the "extra info" for the frame. */
-struct trad_frame_cache *
-mn10300_frame_unwind_cache (struct frame_info *next_frame,
- void **this_prologue_cache)
-{
- struct trad_frame_cache *cache;
- CORE_ADDR pc;
-
- if (*this_prologue_cache)
- return (*this_prologue_cache);
-
- cache = trad_frame_cache_zalloc (next_frame);
- pc = gdbarch_unwind_pc (current_gdbarch, next_frame);
- mn10300_analyze_prologue (next_frame, (void **) &cache, pc);
-
- trad_frame_set_id (cache,
- frame_id_build (trad_frame_get_this_base (cache), pc));
-
- (*this_prologue_cache) = cache;
- return cache;
-}
-
-/* Here is a dummy implementation. */
-static struct frame_id
-mn10300_unwind_dummy_id (struct gdbarch *gdbarch,
- struct frame_info *next_frame)
-{
- return frame_id_build (frame_sp_unwind (next_frame),
- frame_pc_unwind (next_frame));
-}
-
-/* Trad frame implementation. */
-static void
-mn10300_frame_this_id (struct frame_info *next_frame,
- void **this_prologue_cache,
- struct frame_id *this_id)
-{
- struct trad_frame_cache *cache =
- mn10300_frame_unwind_cache (next_frame, this_prologue_cache);
-
- trad_frame_get_id (cache, this_id);
-}
-
-static void
-mn10300_frame_prev_register (struct frame_info *next_frame,
- void **this_prologue_cache,
- int regnum, int *optimizedp,
- enum lval_type *lvalp, CORE_ADDR *addrp,
- int *realnump, void *bufferp)
-{
- struct trad_frame_cache *cache =
- mn10300_frame_unwind_cache (next_frame, this_prologue_cache);
-
- trad_frame_get_register (cache, next_frame, regnum, optimizedp,
- lvalp, addrp, realnump, bufferp);
- /* Or...
- trad_frame_get_prev_register (next_frame, cache->prev_regs, regnum,
- optimizedp, lvalp, addrp, realnump, bufferp);
- */
-}
-
-static const struct frame_unwind mn10300_frame_unwind = {
- NORMAL_FRAME,
- mn10300_frame_this_id,
- mn10300_frame_prev_register
-};
-
-static CORE_ADDR
-mn10300_frame_base_address (struct frame_info *next_frame,
- void **this_prologue_cache)
-{
- struct trad_frame_cache *cache =
- mn10300_frame_unwind_cache (next_frame, this_prologue_cache);
-
- return trad_frame_get_this_base (cache);
-}
-
-static const struct frame_unwind *
-mn10300_frame_sniffer (struct frame_info *next_frame)
-{
- return &mn10300_frame_unwind;
-}
-
-static const struct frame_base mn10300_frame_base = {
- &mn10300_frame_unwind,
- mn10300_frame_base_address,
- mn10300_frame_base_address,
- mn10300_frame_base_address
-};
-
-static CORE_ADDR
-mn10300_unwind_pc (struct gdbarch *gdbarch, struct frame_info *next_frame)
-{
- ULONGEST pc;
-
- frame_unwind_unsigned_register (next_frame, E_PC_REGNUM, &pc);
- return pc;
-}
-
-static CORE_ADDR
-mn10300_unwind_sp (struct gdbarch *gdbarch, struct frame_info *next_frame)
-{
- ULONGEST sp;
-
- frame_unwind_unsigned_register (next_frame, E_SP_REGNUM, &sp);
- return sp;
-}
-
-static void
-mn10300_frame_unwind_init (struct gdbarch *gdbarch)
-{
- frame_unwind_append_sniffer (gdbarch, dwarf2_frame_sniffer);
- frame_unwind_append_sniffer (gdbarch, mn10300_frame_sniffer);
- frame_base_set_default (gdbarch, &mn10300_frame_base);
- set_gdbarch_unwind_dummy_id (gdbarch, mn10300_unwind_dummy_id);
- set_gdbarch_unwind_pc (gdbarch, mn10300_unwind_pc);
- set_gdbarch_unwind_sp (gdbarch, mn10300_unwind_sp);
-}
-
-/* Function: push_dummy_call
- *
- * Set up machine state for a target call, including
- * function arguments, stack, return address, etc.
- *
- */
-
-static CORE_ADDR
-mn10300_push_dummy_call (struct gdbarch *gdbarch,
- struct value *target_func,
- struct regcache *regcache,
- CORE_ADDR bp_addr,
- int nargs, struct value **args,
- CORE_ADDR sp,
- int struct_return,
- CORE_ADDR struct_addr)
-{
- const int push_size = register_size (gdbarch, E_PC_REGNUM);
- int regs_used = struct_return ? 1 : 0;
- int len, arg_len;
- int stack_offset = 0;
- int argnum;
- char *val;
-
- /* FIXME temp, don't handle struct args at all. */
- if (struct_return)
- error ("Target doesn't handle struct return");
-
- /* This should be a nop, but align the stack just in case something
- went wrong. Stacks are four byte aligned on the mn10300. */
- sp &= ~3;
-
- /* Now make space on the stack for the args.
-
- XXX This doesn't appear to handle pass-by-invisible reference
- arguments. */
- for (len = 0, argnum = 0; argnum < nargs; argnum++)
- {
- arg_len = (TYPE_LENGTH (value_type (args[argnum])) + 3) & ~3;
- if (TYPE_CODE (value_type (args[argnum])) == TYPE_CODE_STRUCT)
- error ("Target does not handle struct args");
- while (regs_used < 2 && arg_len > 0)
- {
- regs_used++;
- arg_len -= push_size;
- }
- len += arg_len;
- }
-
- /* Allocate stack space. */
- sp -= len;
-
- regs_used = struct_return ? 1 : 0;
- /* Push all arguments onto the stack. */
- for (argnum = 0; argnum < nargs; argnum++)
- {
- /* FIXME what about structs? */
- arg_len = TYPE_LENGTH (value_type (*args));
- val = (char *) value_contents (*args);
-
- while (regs_used < 2 && arg_len > 0)
- {
- write_register (regs_used, extract_unsigned_integer (val,
- push_size));
- val += push_size;
- arg_len -= push_size;
- regs_used++;
- }
-
- while (arg_len > 0)
- {
- write_memory (sp + stack_offset, val, push_size);
- arg_len -= push_size;
- val += push_size;
- stack_offset += push_size;
- }
-
- args++;
- }
-
- /* Make space for the flushback area. */
- sp -= 8;
-
- /* Push the return address that contains the magic breakpoint. */
- sp -= 4;
- write_memory_unsigned_integer (sp, push_size, bp_addr);
- /* Update $sp. */
- regcache_cooked_write_unsigned (regcache, E_SP_REGNUM, sp);
- return sp;
-}
-
-
-static struct gdbarch *
-mn10300_gdbarch_init (struct gdbarch_info info,
- struct gdbarch_list *arches)
-{
- struct gdbarch *gdbarch;
- struct gdbarch_tdep *tdep;
-
- arches = gdbarch_list_lookup_by_info (arches, &info);
- if (arches != NULL)
- return arches->gdbarch;
-
- tdep = xmalloc (sizeof (struct gdbarch_tdep));
- gdbarch = gdbarch_alloc (&info, tdep);
-
- switch (info.bfd_arch_info->mach)
- {
- case 0:
- case bfd_mach_mn10300:
- set_gdbarch_register_name (gdbarch, mn10300_generic_register_name);
- tdep->am33_mode = 0;
- break;
- case bfd_mach_am33:
- set_gdbarch_register_name (gdbarch, am33_register_name);
- tdep->am33_mode = 1;
- break;
- default:
- internal_error (__FILE__, __LINE__,
- _("mn10300_gdbarch_init: Unknown mn10300 variant"));
- break;
- }
-
- /* Registers. */
- set_gdbarch_num_regs (gdbarch, E_NUM_REGS);
- set_gdbarch_register_type (gdbarch, mn10300_register_type);
- set_gdbarch_skip_prologue (gdbarch, mn10300_skip_prologue);
- set_gdbarch_read_pc (gdbarch, mn10300_read_pc);
- set_gdbarch_write_pc (gdbarch, mn10300_write_pc);
- set_gdbarch_pc_regnum (gdbarch, E_PC_REGNUM);
- set_gdbarch_sp_regnum (gdbarch, E_SP_REGNUM);
-
- /* Stack unwinding. */
- set_gdbarch_inner_than (gdbarch, core_addr_lessthan);
- /* Breakpoints. */
- set_gdbarch_breakpoint_from_pc (gdbarch, mn10300_breakpoint_from_pc);
- /* decr_pc_after_break? */
- /* Disassembly. */
- set_gdbarch_print_insn (gdbarch, print_insn_mn10300);
-
- /* Stage 2 */
- /* MVS Note: at least the first one is deprecated! */
- set_gdbarch_deprecated_use_struct_convention (gdbarch,
- mn10300_use_struct_convention);
- set_gdbarch_store_return_value (gdbarch, mn10300_store_return_value);
- set_gdbarch_extract_return_value (gdbarch, mn10300_extract_return_value);
-
- /* Stage 3 -- get target calls working. */
- set_gdbarch_push_dummy_call (gdbarch, mn10300_push_dummy_call);
- /* set_gdbarch_return_value (store, extract) */
-
-
- mn10300_frame_unwind_init (gdbarch);
-
- return gdbarch;
-}
-
-/* Dump out the mn10300 specific architecture information. */
-
-static void
-mn10300_dump_tdep (struct gdbarch *current_gdbarch, struct ui_file *file)
-{
- struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
- fprintf_unfiltered (file, "mn10300_dump_tdep: am33_mode = %d\n",
- tdep->am33_mode);
-}
-
-void
-_initialize_mn10300_tdep (void)
-{
- gdbarch_register (bfd_arch_mn10300, mn10300_gdbarch_init, mn10300_dump_tdep);
-}
-
+/* Target-dependent code for the Matsushita MN10300 for GDB, the GNU debugger.
+
+ Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004 Free
+ Software Foundation, Inc.
+
+ This file is part of GDB.
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+
+/* MVS Notes:
+
+ To get from 1.1 to 1.2, add:
+ use_struct_convention
+ store_return_value
+ extract_return_value
+ extract_struct_value_address
+
+ Make sure to use regcache. */
+
+/* MVS Notes:
+
+ Apparently cannot run without a stub placeholder for unwind_dummy_id.
+*/
+
+/* MVS Notes:
+
+ To get from 1.2 to 1.3, add:
+ read_pc, write_pc
+ frame_unwind_init
+ struct mn10300_unwind_cache
+ unwind_pc
+ unwind_dummy_id
+ frame_this_id
+ frame_prev_register
+ frame_sniffer (struct mn10300_frame_unwind)
+*/
+
+#include "defs.h"
+#include "arch-utils.h"
+#include "dis-asm.h"
+#include "gdbtypes.h"
+#include "regcache.h"
+#include "gdb_string.h"
+#include "gdb_assert.h"
+#include "gdbcore.h" /* for write_memory_unsigned_integer */
+#include "value.h"
+#include "gdbtypes.h"
+#include "frame.h"
+#include "frame-unwind.h"
+#include "frame-base.h"
+#include "trad-frame.h"
+#include "symtab.h"
+#include "dwarf2-frame.h"
+#include "regcache.h"
+
+#include "mn10300-tdep.h"
+
+
+/* Compute the alignment required by a type. */
+
+static int
+mn10300_type_align (struct type *type)
+{
+ int i, align = 1;
+
+ switch (TYPE_CODE (type))
+ {
+ case TYPE_CODE_INT:
+ case TYPE_CODE_ENUM:
+ case TYPE_CODE_SET:
+ case TYPE_CODE_RANGE:
+ case TYPE_CODE_CHAR:
+ case TYPE_CODE_BOOL:
+ case TYPE_CODE_FLT:
+ case TYPE_CODE_PTR:
+ case TYPE_CODE_REF:
+ return TYPE_LENGTH (type);
+
+ case TYPE_CODE_COMPLEX:
+ return TYPE_LENGTH (type) / 2;
+
+ case TYPE_CODE_STRUCT:
+ case TYPE_CODE_UNION:
+ for (i = 0; i < TYPE_NFIELDS (type); i++)
+ {
+ int falign = mn10300_type_align (TYPE_FIELD_TYPE (type, i));
+ while (align < falign)
+ align <<= 1;
+ }
+ return align;
+
+ case TYPE_CODE_ARRAY:
+ /* HACK! Structures containing arrays, even small ones, are not
+ elligible for returning in registers. */
+ return 256;
+
+ case TYPE_CODE_TYPEDEF:
+ return mn10300_type_align (check_typedef (type));
+
+ default:
+ internal_error (__FILE__, __LINE__, _("bad switch"));
+ }
+}
+
+/* MVS note this is deprecated. */
+/* Should call_function allocate stack space for a struct return? */
+/* gcc_p unused */
+static int
+mn10300_use_struct_convention (int gcc_p, struct type *type)
+{
+ /* Structures bigger than a pair of words can't be returned in
+ registers. */
+ if (TYPE_LENGTH (type) > 8)
+ return 1;
+
+ switch (TYPE_CODE (type))
+ {
+ case TYPE_CODE_STRUCT:
+ case TYPE_CODE_UNION:
+ /* Structures with a single field are handled as the field
+ itself. */
+ if (TYPE_NFIELDS (type) == 1)
+ return mn10300_use_struct_convention (gcc_p,
+ TYPE_FIELD_TYPE (type, 0));
+
+ /* Structures with word or double-word size are passed in memory, as
+ long as they require at least word alignment. */
+ if (mn10300_type_align (type) >= 4)
+ return 0;
+
+ return 1;
+
+ /* Arrays are addressable, so they're never returned in
+ registers. This condition can only hold when the array is
+ the only field of a struct or union. */
+ case TYPE_CODE_ARRAY:
+ return 1;
+
+ case TYPE_CODE_TYPEDEF:
+ return mn10300_use_struct_convention (gcc_p, check_typedef (type));
+
+ default:
+ return 0;
+ }
+}
+
+/* MVS note this is deprecated. */
+static void
+mn10300_store_return_value (struct type *type,
+ struct regcache *regcache, const void *valbuf)
+{
+ struct gdbarch *gdbarch = get_regcache_arch (regcache);
+ int len = TYPE_LENGTH (type);
+ int reg, regsz;
+
+ if (TYPE_CODE (type) == TYPE_CODE_PTR)
+ reg = 4;
+ else
+ reg = 0;
+
+ regsz = register_size (gdbarch, reg);
+
+ if (len <= regsz)
+ regcache_raw_write_part (regcache, reg, 0, len, valbuf);
+ else if (len <= 2 * regsz)
+ {
+ regcache_raw_write (regcache, reg, valbuf);
+ gdb_assert (regsz == register_size (gdbarch, reg + 1));
+ regcache_raw_write_part (regcache, reg+1, 0,
+ len - regsz, (char *) valbuf + regsz);
+ }
+ else
+ internal_error (__FILE__, __LINE__,
+ _("Cannot store return value %d bytes long."), len);
+}
+
+/* MVS note deprecated. */
+static void
+mn10300_extract_return_value (struct type *type,
+ struct regcache *regcache, void *valbuf)
+{
+ struct gdbarch *gdbarch = get_regcache_arch (regcache);
+ char buf[MAX_REGISTER_SIZE];
+ int len = TYPE_LENGTH (type);
+ int reg, regsz;
+
+ if (TYPE_CODE (type) == TYPE_CODE_PTR)
+ reg = 4;
+ else
+ reg = 0;
+
+ regsz = register_size (gdbarch, reg);
+ if (len <= regsz)
+ {
+ regcache_raw_read (regcache, reg, buf);
+ memcpy (valbuf, buf, len);
+ }
+ else if (len <= 2 * regsz)
+ {
+ regcache_raw_read (regcache, reg, buf);
+ memcpy (valbuf, buf, regsz);
+ gdb_assert (regsz == register_size (gdbarch, reg + 1));
+ regcache_raw_read (regcache, reg + 1, buf);
+ memcpy ((char *) valbuf + regsz, buf, len - regsz);
+ }
+ else
+ internal_error (__FILE__, __LINE__,
+ _("Cannot extract return value %d bytes long."), len);
+}
+
+static char *
+register_name (int reg, char **regs, long sizeof_regs)
+{
+ if (reg < 0 || reg >= sizeof_regs / sizeof (regs[0]))
+ return NULL;
+ else
+ return regs[reg];
+}
+
+static const char *
+mn10300_generic_register_name (int reg)
+{
+ static char *regs[] =
+ { "d0", "d1", "d2", "d3", "a0", "a1", "a2", "a3",
+ "sp", "pc", "mdr", "psw", "lir", "lar", "", "",
+ "", "", "", "", "", "", "", "",
+ "", "", "", "", "", "", "", "fp"
+ };
+ return register_name (reg, regs, sizeof regs);
+}
+
+
+static const char *
+am33_register_name (int reg)
+{
+ static char *regs[] =
+ { "d0", "d1", "d2", "d3", "a0", "a1", "a2", "a3",
+ "sp", "pc", "mdr", "psw", "lir", "lar", "",
+ "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
+ "ssp", "msp", "usp", "mcrh", "mcrl", "mcvf", "", "", ""
+ };
+ return register_name (reg, regs, sizeof regs);
+}
+
+
+static struct type *
+mn10300_register_type (struct gdbarch *gdbarch, int reg)
+{
+ return builtin_type_int;
+}
+
+static CORE_ADDR
+mn10300_read_pc (ptid_t ptid)
+{
+ return read_register_pid (E_PC_REGNUM, ptid);
+}
+
+static void
+mn10300_write_pc (CORE_ADDR val, ptid_t ptid)
+{
+ return write_register_pid (E_PC_REGNUM, val, ptid);
+}
+
+/* The breakpoint instruction must be the same size as the smallest
+ instruction in the instruction set.
+
+ The Matsushita mn10x00 processors have single byte instructions
+ so we need a single byte breakpoint. Matsushita hasn't defined
+ one, so we defined it ourselves. */
+
+const static unsigned char *
+mn10300_breakpoint_from_pc (CORE_ADDR *bp_addr, int *bp_size)
+{
+ static char breakpoint[] = {0xff};
+ *bp_size = 1;
+ return breakpoint;
+}
+
+/* Function: skip_prologue
+ Return the address of the first inst past the prologue of the function. */
+
+static CORE_ADDR
+mn10300_skip_prologue (CORE_ADDR pc)
+{
+ /* FIXME: not implemented. */
+ /* First approximation, try simply using skip_prologue_using_sal. */
+ return skip_prologue_using_sal (pc);
+}
+
+/* Simple frame_unwind_cache.
+ This finds the "extra info" for the frame. */
+struct trad_frame_cache *
+mn10300_frame_unwind_cache (struct frame_info *next_frame,
+ void **this_prologue_cache)
+{
+ struct trad_frame_cache *cache;
+ CORE_ADDR pc;
+
+ if (*this_prologue_cache)
+ return (*this_prologue_cache);
+
+ cache = trad_frame_cache_zalloc (next_frame);
+ pc = gdbarch_unwind_pc (current_gdbarch, next_frame);
+ mn10300_analyze_prologue (next_frame, (void **) &cache, pc);
+
+ trad_frame_set_id (cache,
+ frame_id_build (trad_frame_get_this_base (cache),
+ frame_func_unwind (next_frame)));
+
+ (*this_prologue_cache) = cache;
+ return cache;
+}
+
+/* Here is a dummy implementation. */
+static struct frame_id
+mn10300_unwind_dummy_id (struct gdbarch *gdbarch,
+ struct frame_info *next_frame)
+{
+ return frame_id_build (frame_sp_unwind (next_frame),
+ frame_pc_unwind (next_frame));
+}
+
+/* Trad frame implementation. */
+static void
+mn10300_frame_this_id (struct frame_info *next_frame,
+ void **this_prologue_cache,
+ struct frame_id *this_id)
+{
+ struct trad_frame_cache *cache =
+ mn10300_frame_unwind_cache (next_frame, this_prologue_cache);
+
+ trad_frame_get_id (cache, this_id);
+}
+
+static void
+mn10300_frame_prev_register (struct frame_info *next_frame,
+ void **this_prologue_cache,
+ int regnum, int *optimizedp,
+ enum lval_type *lvalp, CORE_ADDR *addrp,
+ int *realnump, void *bufferp)
+{
+ struct trad_frame_cache *cache =
+ mn10300_frame_unwind_cache (next_frame, this_prologue_cache);
+
+ trad_frame_get_register (cache, next_frame, regnum, optimizedp,
+ lvalp, addrp, realnump, bufferp);
+ /* Or...
+ trad_frame_get_prev_register (next_frame, cache->prev_regs, regnum,
+ optimizedp, lvalp, addrp, realnump, bufferp);
+ */
+}
+
+static const struct frame_unwind mn10300_frame_unwind = {
+ NORMAL_FRAME,
+ mn10300_frame_this_id,
+ mn10300_frame_prev_register
+};
+
+static CORE_ADDR
+mn10300_frame_base_address (struct frame_info *next_frame,
+ void **this_prologue_cache)
+{
+ struct trad_frame_cache *cache =
+ mn10300_frame_unwind_cache (next_frame, this_prologue_cache);
+
+ return trad_frame_get_this_base (cache);
+}
+
+static const struct frame_unwind *
+mn10300_frame_sniffer (struct frame_info *next_frame)
+{
+ return &mn10300_frame_unwind;
+}
+
+static const struct frame_base mn10300_frame_base = {
+ &mn10300_frame_unwind,
+ mn10300_frame_base_address,
+ mn10300_frame_base_address,
+ mn10300_frame_base_address
+};
+
+static CORE_ADDR
+mn10300_unwind_pc (struct gdbarch *gdbarch, struct frame_info *next_frame)
+{
+ ULONGEST pc;
+
+ frame_unwind_unsigned_register (next_frame, E_PC_REGNUM, &pc);
+ return pc;
+}
+
+static CORE_ADDR
+mn10300_unwind_sp (struct gdbarch *gdbarch, struct frame_info *next_frame)
+{
+ ULONGEST sp;
+
+ frame_unwind_unsigned_register (next_frame, E_SP_REGNUM, &sp);
+ return sp;
+}
+
+static void
+mn10300_frame_unwind_init (struct gdbarch *gdbarch)
+{
+ frame_unwind_append_sniffer (gdbarch, dwarf2_frame_sniffer);
+ frame_unwind_append_sniffer (gdbarch, mn10300_frame_sniffer);
+ frame_base_set_default (gdbarch, &mn10300_frame_base);
+ set_gdbarch_unwind_dummy_id (gdbarch, mn10300_unwind_dummy_id);
+ set_gdbarch_unwind_pc (gdbarch, mn10300_unwind_pc);
+ set_gdbarch_unwind_sp (gdbarch, mn10300_unwind_sp);
+}
+
+/* Function: push_dummy_call
+ *
+ * Set up machine state for a target call, including
+ * function arguments, stack, return address, etc.
+ *
+ */
+
+static CORE_ADDR
+mn10300_push_dummy_call (struct gdbarch *gdbarch,
+ struct value *target_func,
+ struct regcache *regcache,
+ CORE_ADDR bp_addr,
+ int nargs, struct value **args,
+ CORE_ADDR sp,
+ int struct_return,
+ CORE_ADDR struct_addr)
+{
+ const int push_size = register_size (gdbarch, E_PC_REGNUM);
+ int regs_used = struct_return ? 1 : 0;
+ int len, arg_len;
+ int stack_offset = 0;
+ int argnum;
+ char *val;
+
+ /* FIXME temp, don't handle struct args at all. */
+ if (struct_return)
+ error ("Target doesn't handle struct return");
+
+ /* This should be a nop, but align the stack just in case something
+ went wrong. Stacks are four byte aligned on the mn10300. */
+ sp &= ~3;
+
+ /* Now make space on the stack for the args.
+
+ XXX This doesn't appear to handle pass-by-invisible reference
+ arguments. */
+ for (len = 0, argnum = 0; argnum < nargs; argnum++)
+ {
+ arg_len = (TYPE_LENGTH (value_type (args[argnum])) + 3) & ~3;
+ if (TYPE_CODE (value_type (args[argnum])) == TYPE_CODE_STRUCT)
+ error ("Target does not handle struct args");
+ while (regs_used < 2 && arg_len > 0)
+ {
+ regs_used++;
+ arg_len -= push_size;
+ }
+ len += arg_len;
+ }
+
+ /* Allocate stack space. */
+ sp -= len;
+
+ regs_used = struct_return ? 1 : 0;
+ /* Push all arguments onto the stack. */
+ for (argnum = 0; argnum < nargs; argnum++)
+ {
+ /* FIXME what about structs? */
+ arg_len = TYPE_LENGTH (value_type (*args));
+ val = (char *) value_contents (*args);
+
+ while (regs_used < 2 && arg_len > 0)
+ {
+ write_register (regs_used, extract_unsigned_integer (val,
+ push_size));
+ val += push_size;
+ arg_len -= push_size;
+ regs_used++;
+ }
+
+ while (arg_len > 0)
+ {
+ write_memory (sp + stack_offset, val, push_size);
+ arg_len -= push_size;
+ val += push_size;
+ stack_offset += push_size;
+ }
+
+ args++;
+ }
+
+ /* Make space for the flushback area. */
+ sp -= 8;
+
+ /* Push the return address that contains the magic breakpoint. */
+ sp -= 4;
+ write_memory_unsigned_integer (sp, push_size, bp_addr);
+ /* Update $sp. */
+ regcache_cooked_write_unsigned (regcache, E_SP_REGNUM, sp);
+ return sp;
+}
+
+
+static struct gdbarch *
+mn10300_gdbarch_init (struct gdbarch_info info,
+ struct gdbarch_list *arches)
+{
+ struct gdbarch *gdbarch;
+ struct gdbarch_tdep *tdep;
+
+ arches = gdbarch_list_lookup_by_info (arches, &info);
+ if (arches != NULL)
+ return arches->gdbarch;
+
+ tdep = xmalloc (sizeof (struct gdbarch_tdep));
+ gdbarch = gdbarch_alloc (&info, tdep);
+
+ switch (info.bfd_arch_info->mach)
+ {
+ case 0:
+ case bfd_mach_mn10300:
+ set_gdbarch_register_name (gdbarch, mn10300_generic_register_name);
+ tdep->am33_mode = 0;
+ break;
+ case bfd_mach_am33:
+ set_gdbarch_register_name (gdbarch, am33_register_name);
+ tdep->am33_mode = 1;
+ break;
+ default:
+ internal_error (__FILE__, __LINE__,
+ _("mn10300_gdbarch_init: Unknown mn10300 variant"));
+ break;
+ }
+
+ /* Registers. */
+ set_gdbarch_num_regs (gdbarch, E_NUM_REGS);
+ set_gdbarch_register_type (gdbarch, mn10300_register_type);
+ set_gdbarch_skip_prologue (gdbarch, mn10300_skip_prologue);
+ set_gdbarch_read_pc (gdbarch, mn10300_read_pc);
+ set_gdbarch_write_pc (gdbarch, mn10300_write_pc);
+ set_gdbarch_pc_regnum (gdbarch, E_PC_REGNUM);
+ set_gdbarch_sp_regnum (gdbarch, E_SP_REGNUM);
+
+ /* Stack unwinding. */
+ set_gdbarch_inner_than (gdbarch, core_addr_lessthan);
+ /* Breakpoints. */
+ set_gdbarch_breakpoint_from_pc (gdbarch, mn10300_breakpoint_from_pc);
+ /* decr_pc_after_break? */
+ /* Disassembly. */
+ set_gdbarch_print_insn (gdbarch, print_insn_mn10300);
+
+ /* Stage 2 */
+ /* MVS Note: at least the first one is deprecated! */
+ set_gdbarch_deprecated_use_struct_convention (gdbarch,
+ mn10300_use_struct_convention);
+ set_gdbarch_store_return_value (gdbarch, mn10300_store_return_value);
+ set_gdbarch_extract_return_value (gdbarch, mn10300_extract_return_value);
+
+ /* Stage 3 -- get target calls working. */
+ set_gdbarch_push_dummy_call (gdbarch, mn10300_push_dummy_call);
+ /* set_gdbarch_return_value (store, extract) */
+
+
+ mn10300_frame_unwind_init (gdbarch);
+
+ return gdbarch;
+}
+
+/* Dump out the mn10300 specific architecture information. */
+
+static void
+mn10300_dump_tdep (struct gdbarch *current_gdbarch, struct ui_file *file)
+{
+ struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
+ fprintf_unfiltered (file, "mn10300_dump_tdep: am33_mode = %d\n",
+ tdep->am33_mode);
+}
+
+void
+_initialize_mn10300_tdep (void)
+{
+ gdbarch_register (bfd_arch_mn10300, mn10300_gdbarch_init, mn10300_dump_tdep);
+}
+