--- /dev/null
+/* Target-dependent code for the Matsushita MN10300 for GDB, the GNU debugger.\r
+\r
+ Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004 Free\r
+ Software Foundation, Inc.\r
+\r
+ This file is part of GDB.\r
+\r
+ This program is free software; you can redistribute it and/or modify\r
+ it under the terms of the GNU General Public License as published by\r
+ the Free Software Foundation; either version 2 of the License, or\r
+ (at your option) any later version.\r
+\r
+ This program is distributed in the hope that it will be useful,\r
+ but WITHOUT ANY WARRANTY; without even the implied warranty of\r
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\r
+ GNU General Public License for more details.\r
+\r
+ You should have received a copy of the GNU General Public License\r
+ along with this program; if not, write to the Free Software\r
+ Foundation, Inc., 59 Temple Place - Suite 330,\r
+ Boston, MA 02111-1307, USA. */\r
+\r
+/* MVS Notes:\r
+\r
+ To get from 1.1 to 1.2, add:\r
+ use_struct_convention\r
+ store_return_value\r
+ extract_return_value\r
+ extract_struct_value_address\r
+ \r
+ Make sure to use regcache. */\r
+\r
+/* MVS Notes:\r
+\r
+ Apparently cannot run without a stub placeholder for unwind_dummy_id. \r
+*/\r
+\r
+/* MVS Notes:\r
+\r
+ To get from 1.2 to 1.3, add:\r
+ read_pc, write_pc\r
+ frame_unwind_init\r
+ struct mn10300_unwind_cache\r
+ unwind_pc\r
+ unwind_dummy_id\r
+ frame_this_id\r
+ frame_prev_register\r
+ frame_sniffer (struct mn10300_frame_unwind)\r
+*/\r
+\r
+#include "defs.h"\r
+#include "arch-utils.h"\r
+#include "dis-asm.h"\r
+#include "gdbtypes.h"\r
+#include "regcache.h"\r
+#include "gdb_string.h"\r
+#include "gdb_assert.h"\r
+#include "frame.h"\r
+#include "frame-unwind.h"\r
+#include "frame-base.h"\r
+#include "trad-frame.h"\r
+#include "symtab.h"\r
+#include "dwarf2-frame.h"\r
+#include "regcache.h"\r
+\r
+#include "mn10300-tdep.h"\r
+\r
+enum {\r
+ E_D0_REGNUM = 0,\r
+ E_D1_REGNUM = 1,\r
+ E_D2_REGNUM = 2,\r
+ E_D3_REGNUM = 3,\r
+ E_A0_REGNUM = 4,\r
+ E_A1_REGNUM = 5,\r
+ E_A2_REGNUM = 6,\r
+ E_A3_REGNUM = 7,\r
+ E_SP_REGNUM = 8,\r
+ E_PC_REGNUM = 9,\r
+ E_MDR_REGNUM = 10,\r
+ E_PSW_REGNUM = 11,\r
+ E_LIR_REGNUM = 12,\r
+ E_LAR_REGNUM = 13,\r
+ E_MDRQ_REGNUM = 14,\r
+ E_E0_REGNUM = 15,\r
+ E_MCRH_REGNUM = 26,\r
+ E_MCRL_REGNUM = 27,\r
+ E_MCVF_REGNUM = 28,\r
+ E_NUM_REGS = 32\r
+};\r
+\r
+\r
+/* Compute the alignment required by a type. */\r
+\r
+static int\r
+mn10300_type_align (struct type *type)\r
+{\r
+ int i, align = 1;\r
+\r
+ switch (TYPE_CODE (type))\r
+ {\r
+ case TYPE_CODE_INT:\r
+ case TYPE_CODE_ENUM:\r
+ case TYPE_CODE_SET:\r
+ case TYPE_CODE_RANGE:\r
+ case TYPE_CODE_CHAR:\r
+ case TYPE_CODE_BOOL:\r
+ case TYPE_CODE_FLT:\r
+ case TYPE_CODE_PTR:\r
+ case TYPE_CODE_REF:\r
+ return TYPE_LENGTH (type);\r
+\r
+ case TYPE_CODE_COMPLEX:\r
+ return TYPE_LENGTH (type) / 2;\r
+\r
+ case TYPE_CODE_STRUCT:\r
+ case TYPE_CODE_UNION:\r
+ for (i = 0; i < TYPE_NFIELDS (type); i++)\r
+ {\r
+ int falign = mn10300_type_align (TYPE_FIELD_TYPE (type, i));\r
+ while (align < falign)\r
+ align <<= 1;\r
+ }\r
+ return align;\r
+\r
+ case TYPE_CODE_ARRAY:\r
+ /* HACK! Structures containing arrays, even small ones, are not\r
+ elligible for returning in registers. */\r
+ return 256;\r
+\r
+ case TYPE_CODE_TYPEDEF:\r
+ return mn10300_type_align (check_typedef (type));\r
+\r
+ default:\r
+ internal_error (__FILE__, __LINE__, "bad switch");\r
+ }\r
+}\r
+\r
+/* MVS note this is deprecated. */\r
+/* Should call_function allocate stack space for a struct return? */\r
+/* gcc_p unused */\r
+static int\r
+mn10300_use_struct_convention (int gcc_p, struct type *type)\r
+{\r
+ /* Structures bigger than a pair of words can't be returned in\r
+ registers. */\r
+ if (TYPE_LENGTH (type) > 8)\r
+ return 1;\r
+\r
+ switch (TYPE_CODE (type))\r
+ {\r
+ case TYPE_CODE_STRUCT:\r
+ case TYPE_CODE_UNION:\r
+ /* Structures with a single field are handled as the field\r
+ itself. */\r
+ if (TYPE_NFIELDS (type) == 1)\r
+ return mn10300_use_struct_convention (gcc_p, \r
+ TYPE_FIELD_TYPE (type, 0));\r
+\r
+ /* Structures with word or double-word size are passed in memory, as\r
+ long as they require at least word alignment. */\r
+ if (mn10300_type_align (type) >= 4)\r
+ return 0;\r
+\r
+ return 1;\r
+\r
+ /* Arrays are addressable, so they're never returned in\r
+ registers. This condition can only hold when the array is\r
+ the only field of a struct or union. */\r
+ case TYPE_CODE_ARRAY:\r
+ return 1;\r
+\r
+ case TYPE_CODE_TYPEDEF:\r
+ return mn10300_use_struct_convention (gcc_p, check_typedef (type));\r
+\r
+ default:\r
+ return 0;\r
+ }\r
+}\r
+\r
+/* MVS note this is deprecated. */\r
+static void\r
+mn10300_store_return_value (struct type *type,\r
+ struct regcache *regcache, const void *valbuf)\r
+{\r
+ struct gdbarch *gdbarch = get_regcache_arch (regcache);\r
+ int len = TYPE_LENGTH (type);\r
+ int reg, regsz;\r
+ \r
+ if (TYPE_CODE (type) == TYPE_CODE_PTR)\r
+ reg = 4;\r
+ else\r
+ reg = 0;\r
+\r
+ regsz = register_size (gdbarch, reg);\r
+\r
+ if (len <= regsz)\r
+ regcache_raw_write_part (regcache, reg, 0, len, valbuf);\r
+ else if (len <= 2 * regsz)\r
+ {\r
+ regcache_raw_write (regcache, reg, valbuf);\r
+ gdb_assert (regsz == register_size (gdbarch, reg + 1));\r
+ regcache_raw_write_part (regcache, reg+1, 0,\r
+ len - regsz, (char *) valbuf + regsz);\r
+ }\r
+ else\r
+ internal_error (__FILE__, __LINE__,\r
+ "Cannot store return value %d bytes long.", len);\r
+}\r
+\r
+/* MVS note deprecated. */\r
+static void\r
+mn10300_extract_return_value (struct type *type,\r
+ struct regcache *regcache, void *valbuf)\r
+{\r
+ struct gdbarch *gdbarch = get_regcache_arch (regcache);\r
+ char buf[MAX_REGISTER_SIZE];\r
+ int len = TYPE_LENGTH (type);\r
+ int reg, regsz;\r
+\r
+ if (TYPE_CODE (type) == TYPE_CODE_PTR)\r
+ reg = 4;\r
+ else\r
+ reg = 0;\r
+\r
+ regsz = register_size (gdbarch, reg);\r
+ if (len <= regsz)\r
+ {\r
+ regcache_raw_read (regcache, reg, buf);\r
+ memcpy (valbuf, buf, len);\r
+ }\r
+ else if (len <= 2 * regsz)\r
+ {\r
+ regcache_raw_read (regcache, reg, buf);\r
+ memcpy (valbuf, buf, regsz);\r
+ gdb_assert (regsz == register_size (gdbarch, reg + 1));\r
+ regcache_raw_read (regcache, reg + 1, buf);\r
+ memcpy ((char *) valbuf + regsz, buf, len - regsz);\r
+ }\r
+ else\r
+ internal_error (__FILE__, __LINE__,\r
+ "Cannot extract return value %d bytes long.", len);\r
+}\r
+\r
+static char *\r
+register_name (int reg, char **regs, long sizeof_regs)\r
+{\r
+ if (reg < 0 || reg >= sizeof_regs / sizeof (regs[0]))\r
+ return NULL;\r
+ else\r
+ return regs[reg];\r
+}\r
+\r
+static const char *\r
+mn10300_generic_register_name (int reg)\r
+{\r
+ static char *regs[] =\r
+ { "d0", "d1", "d2", "d3", "a0", "a1", "a2", "a3",\r
+ "sp", "pc", "mdr", "psw", "lir", "lar", "", "",\r
+ "", "", "", "", "", "", "", "",\r
+ "", "", "", "", "", "", "", "fp"\r
+ };\r
+ return register_name (reg, regs, sizeof regs);\r
+}\r
+\r
+\r
+static const char *\r
+am33_register_name (int reg)\r
+{\r
+ static char *regs[] =\r
+ { "d0", "d1", "d2", "d3", "a0", "a1", "a2", "a3",\r
+ "sp", "pc", "mdr", "psw", "lir", "lar", "",\r
+ "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",\r
+ "ssp", "msp", "usp", "mcrh", "mcrl", "mcvf", "", "", ""\r
+ };\r
+ return register_name (reg, regs, sizeof regs);\r
+}\r
+\r
+\r
+static struct type *\r
+mn10300_register_type (struct gdbarch *gdbarch, int reg)\r
+{\r
+ return builtin_type_int;\r
+}\r
+\r
+static CORE_ADDR\r
+mn10300_read_pc (ptid_t ptid)\r
+{\r
+ return read_register_pid (E_PC_REGNUM, ptid);\r
+}\r
+\r
+static void\r
+mn10300_write_pc (CORE_ADDR val, ptid_t ptid)\r
+{\r
+ return write_register_pid (E_PC_REGNUM, val, ptid);\r
+}\r
+\r
+/* The breakpoint instruction must be the same size as the smallest\r
+ instruction in the instruction set.\r
+\r
+ The Matsushita mn10x00 processors have single byte instructions\r
+ so we need a single byte breakpoint. Matsushita hasn't defined\r
+ one, so we defined it ourselves. */\r
+\r
+const static unsigned char *\r
+mn10300_breakpoint_from_pc (CORE_ADDR *bp_addr, int *bp_size)\r
+{\r
+ static char breakpoint[] = {0xff};\r
+ *bp_size = 1;\r
+ return breakpoint;\r
+}\r
+\r
+/* Function: skip_prologue\r
+ Return the address of the first inst past the prologue of the function. */\r
+\r
+static CORE_ADDR\r
+mn10300_skip_prologue (CORE_ADDR pc)\r
+{\r
+ /* FIXME: not implemented. */\r
+ /* First approximation, try simply using skip_prologue_using_sal. */\r
+ return skip_prologue_using_sal (pc);\r
+}\r
+\r
+/* Simple frame_unwind_cache. \r
+ This finds the "extra info" for the frame. */\r
+struct trad_frame_cache *\r
+mn10300_frame_unwind_cache (struct frame_info *next_frame,\r
+ void **this_prologue_cache)\r
+{\r
+ struct trad_frame_cache *cache;\r
+\r
+ if (*this_prologue_cache)\r
+ return (*this_prologue_cache);\r
+\r
+ cache = trad_frame_cache_zalloc (next_frame);\r
+ trad_frame_set_id (cache, \r
+ frame_id_build (gdbarch_unwind_sp (current_gdbarch,\r
+ next_frame),\r
+ gdbarch_unwind_pc (current_gdbarch,\r
+ next_frame)));\r
+\r
+ /* FIXME: The SP isn't the frame base, so this is 0th approximation. */\r
+ /* FIXME: The A3 reg isn't always the frame register either, so this\r
+ is 1st approximation. */\r
+ trad_frame_set_this_base (cache, \r
+ frame_unwind_register_signed (next_frame, \r
+ E_A3_REGNUM));\r
+ (*this_prologue_cache) = cache;\r
+ return cache;\r
+}\r
+\r
+/* Here is a dummy implementation. */\r
+static struct frame_id\r
+mn10300_dummy_unwind_dummy_id (struct gdbarch *gdbarch,\r
+ struct frame_info *next_frame)\r
+{\r
+ return frame_id_build (0, 0);\r
+}\r
+\r
+/* Trad frame implementation. */\r
+static void\r
+mn10300_frame_this_id (struct frame_info *next_frame,\r
+ void **this_prologue_cache,\r
+ struct frame_id *this_id)\r
+{\r
+ struct trad_frame_cache *cache = \r
+ mn10300_frame_unwind_cache (next_frame, this_prologue_cache);\r
+\r
+ trad_frame_get_id (cache, this_id);\r
+}\r
+\r
+static void\r
+mn10300_frame_prev_register (struct frame_info *next_frame,\r
+ void **this_prologue_cache,\r
+ int regnum, int *optimizedp,\r
+ enum lval_type *lvalp, CORE_ADDR *addrp,\r
+ int *realnump, void *bufferp)\r
+{\r
+ struct trad_frame_cache *cache =\r
+ mn10300_frame_unwind_cache (next_frame, this_prologue_cache);\r
+\r
+ trad_frame_get_register (cache, next_frame, regnum, optimizedp, \r
+ lvalp, addrp, realnump, bufferp);\r
+ /* Or...\r
+ trad_frame_get_prev_register (next_frame, cache->prev_regs, regnum, \r
+ optimizedp, lvalp, addrp, realnump, bufferp);\r
+ */\r
+}\r
+\r
+static const struct frame_unwind mn10300_frame_unwind = {\r
+ NORMAL_FRAME,\r
+ mn10300_frame_this_id, \r
+ mn10300_frame_prev_register\r
+};\r
+\r
+static CORE_ADDR\r
+mn10300_frame_base_address (struct frame_info *next_frame,\r
+ void **this_prologue_cache)\r
+{\r
+ struct trad_frame_cache *cache = \r
+ mn10300_frame_unwind_cache (next_frame, this_prologue_cache);\r
+\r
+ return trad_frame_get_this_base (cache);\r
+}\r
+\r
+static const struct frame_unwind *\r
+mn10300_frame_sniffer (struct frame_info *next_frame)\r
+{\r
+ return &mn10300_frame_unwind;\r
+}\r
+\r
+static const struct frame_base mn10300_frame_base = {\r
+ &mn10300_frame_unwind, \r
+ mn10300_frame_base_address, \r
+ mn10300_frame_base_address,\r
+ mn10300_frame_base_address\r
+};\r
+\r
+static CORE_ADDR\r
+mn10300_unwind_pc (struct gdbarch *gdbarch, struct frame_info *next_frame)\r
+{\r
+ ULONGEST pc;\r
+\r
+ frame_unwind_unsigned_register (next_frame, E_PC_REGNUM, &pc);\r
+ return pc;\r
+}\r
+\r
+static CORE_ADDR\r
+mn10300_unwind_sp (struct gdbarch *gdbarch, struct frame_info *next_frame)\r
+{\r
+ ULONGEST sp;\r
+\r
+ frame_unwind_unsigned_register (next_frame, E_SP_REGNUM, &sp);\r
+ return sp;\r
+}\r
+\r
+static void\r
+mn10300_frame_unwind_init (struct gdbarch *gdbarch)\r
+{\r
+ frame_unwind_append_sniffer (gdbarch, dwarf2_frame_sniffer);\r
+ frame_unwind_append_sniffer (gdbarch, mn10300_frame_sniffer);\r
+ frame_base_set_default (gdbarch, &mn10300_frame_base);\r
+ set_gdbarch_unwind_dummy_id (gdbarch, mn10300_dummy_unwind_dummy_id);\r
+ set_gdbarch_unwind_pc (gdbarch, mn10300_unwind_pc);\r
+ set_gdbarch_unwind_sp (gdbarch, mn10300_unwind_sp);\r
+}\r
+\r
+/* Dump out the mn10300 specific architecture information. */\r
+\r
+static void\r
+mn10300_dump_tdep (struct gdbarch *current_gdbarch, struct ui_file *file)\r
+{\r
+ struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);\r
+ fprintf_unfiltered (file, "mn10300_dump_tdep: am33_mode = %d\n",\r
+ tdep->am33_mode);\r
+}\r
+\r
+static struct gdbarch *\r
+mn10300_gdbarch_init (struct gdbarch_info info,\r
+ struct gdbarch_list *arches)\r
+{\r
+ struct gdbarch *gdbarch;\r
+ struct gdbarch_tdep *tdep;\r
+\r
+ arches = gdbarch_list_lookup_by_info (arches, &info);\r
+ if (arches != NULL)\r
+ return arches->gdbarch;\r
+\r
+ tdep = xmalloc (sizeof (struct gdbarch_tdep));\r
+ gdbarch = gdbarch_alloc (&info, tdep);\r
+\r
+ switch (info.bfd_arch_info->mach)\r
+ {\r
+ case 0:\r
+ case bfd_mach_mn10300:\r
+ set_gdbarch_register_name (gdbarch, mn10300_generic_register_name);\r
+ tdep->am33_mode = 0;\r
+ break;\r
+ case bfd_mach_am33:\r
+ set_gdbarch_register_name (gdbarch, am33_register_name);\r
+ tdep->am33_mode = 1;\r
+ break;\r
+ default:\r
+ internal_error (__FILE__, __LINE__,\r
+ "mn10300_gdbarch_init: Unknown mn10300 variant");\r
+ break;\r
+ }\r
+\r
+ /* Registers. */\r
+ set_gdbarch_num_regs (gdbarch, E_NUM_REGS);\r
+ set_gdbarch_register_type (gdbarch, mn10300_register_type);\r
+ set_gdbarch_skip_prologue (gdbarch, mn10300_skip_prologue);\r
+ set_gdbarch_read_pc (gdbarch, mn10300_read_pc);\r
+ set_gdbarch_write_pc (gdbarch, mn10300_write_pc);\r
+ set_gdbarch_pc_regnum (gdbarch, E_PC_REGNUM);\r
+ set_gdbarch_sp_regnum (gdbarch, E_SP_REGNUM);\r
+\r
+ /* Stack unwinding. */\r
+ set_gdbarch_inner_than (gdbarch, core_addr_lessthan);\r
+ /* Breakpoints. */\r
+ set_gdbarch_breakpoint_from_pc (gdbarch, mn10300_breakpoint_from_pc);\r
+ /* decr_pc_after_break? */\r
+ /* Disassembly. */\r
+ set_gdbarch_print_insn (gdbarch, print_insn_mn10300);\r
+\r
+ /* Stage 2 */\r
+ /* MVS Note: at least the first one is deprecated! */\r
+ set_gdbarch_deprecated_use_struct_convention (gdbarch, \r
+ mn10300_use_struct_convention);\r
+ set_gdbarch_store_return_value (gdbarch, mn10300_store_return_value);\r
+ set_gdbarch_extract_return_value (gdbarch, mn10300_extract_return_value);\r
+\r
+ mn10300_frame_unwind_init (gdbarch);\r
+\r
+ return gdbarch;\r
+}\r
+ \r
+void\r
+_initialize_mn10300_tdep (void)\r
+{\r
+ gdbarch_register (bfd_arch_mn10300, mn10300_gdbarch_init, mn10300_dump_tdep);\r
+}\r
+\r
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