2009-11-10 Tristan Gingold <gingold@adacore.com>
* avr-tdep.c: Add AVR_PSEUDO_PC_REGNUM and AVR_NUM_PSEUDO_REGS. (struct gdbarch_tdep): Add void_type, func_void_type and pc_type fields. (avr_register_name): Add "pc" name, renames "PC" to "PC2". (avr_register_type): Handle AVR_PSEUDO_PC_REGNUM. (avr_write_pc): Fix indentation. (avr_pseudo_register_read): New function. (avr_pseudo_register_write): New function. (avr_frame_prev_register): Handle AVR_PSEUDO_PC_REGNUM. (avr_gdbarch_init): Create types for pc. Register pseudo regs.
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Tristan Gingold
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8a1d23b2ab
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7d2552b4b6
@ -1,3 +1,16 @@
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2009-11-10 Tristan Gingold <gingold@adacore.com>
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* avr-tdep.c: Add AVR_PSEUDO_PC_REGNUM and AVR_NUM_PSEUDO_REGS.
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(struct gdbarch_tdep): Add void_type, func_void_type and pc_type
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fields.
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(avr_register_name): Add "pc" name, renames "PC" to "PC2".
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(avr_register_type): Handle AVR_PSEUDO_PC_REGNUM.
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(avr_write_pc): Fix indentation.
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(avr_pseudo_register_read): New function.
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(avr_pseudo_register_write): New function.
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(avr_frame_prev_register): Handle AVR_PSEUDO_PC_REGNUM.
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(avr_gdbarch_init): Create types for pc. Register pseudo regs.
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2009-11-10 Tristan Gingold <gingold@adacore.com>
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* avr-tdep.c (avr_integer_to_address): New function.
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@ -89,6 +89,10 @@ enum
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AVR_NUM_REGS = 32 + 1 /*SREG*/ + 1 /*SP*/ + 1 /*PC*/,
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AVR_NUM_REG_BYTES = 32 + 1 /*SREG*/ + 2 /*SP*/ + 4 /*PC*/,
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/* Pseudo registers. */
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AVR_PSEUDO_PC_REGNUM = 35,
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AVR_NUM_PSEUDO_REGS = 1,
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AVR_PC_REG_INDEX = 35, /* index into array of registers */
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AVR_MAX_PROLOGUE_SIZE = 64, /* bytes */
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@ -181,6 +185,13 @@ struct gdbarch_tdep
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/* Number of bytes stored to the stack by call instructions.
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2 bytes for avr1-5, 3 bytes for avr6. */
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int call_length;
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/* Type for void. */
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struct type *void_type;
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/* Type for a function returning void. */
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struct type *func_void_type;
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/* Type for a pointer to a function. Used for the type of PC. */
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struct type *pc_type;
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};
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/* Lookup the name of a register given it's number. */
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@ -193,7 +204,8 @@ avr_register_name (struct gdbarch *gdbarch, int regnum)
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"r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15",
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"r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23",
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"r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31",
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"SREG", "SP", "PC"
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"SREG", "SP", "PC2",
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"pc"
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};
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if (regnum < 0)
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return NULL;
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@ -210,10 +222,11 @@ avr_register_type (struct gdbarch *gdbarch, int reg_nr)
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{
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if (reg_nr == AVR_PC_REGNUM)
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return builtin_type (gdbarch)->builtin_uint32;
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if (reg_nr == AVR_PSEUDO_PC_REGNUM)
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return gdbarch_tdep (gdbarch)->pc_type;
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if (reg_nr == AVR_SP_REGNUM)
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return builtin_type (gdbarch)->builtin_data_ptr;
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else
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return builtin_type (gdbarch)->builtin_uint8;
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return builtin_type (gdbarch)->builtin_uint8;
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}
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/* Instruction address checks and convertions. */
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@ -338,7 +351,43 @@ static void
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avr_write_pc (struct regcache *regcache, CORE_ADDR val)
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{
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regcache_cooked_write_unsigned (regcache, AVR_PC_REGNUM,
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avr_convert_iaddr_to_raw (val));
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avr_convert_iaddr_to_raw (val));
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}
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static void
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avr_pseudo_register_read (struct gdbarch *gdbarch, struct regcache *regcache,
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int regnum, gdb_byte *buf)
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{
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ULONGEST val;
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switch (regnum)
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{
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case AVR_PSEUDO_PC_REGNUM:
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regcache_raw_read_unsigned (regcache, AVR_PC_REGNUM, &val);
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val >>= 1;
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store_unsigned_integer (buf, 4, gdbarch_byte_order (gdbarch), val);
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break;
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default:
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internal_error (__FILE__, __LINE__, _("invalid regnum"));
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}
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}
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static void
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avr_pseudo_register_write (struct gdbarch *gdbarch, struct regcache *regcache,
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int regnum, const gdb_byte *buf)
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{
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ULONGEST val;
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switch (regnum)
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{
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case AVR_PSEUDO_PC_REGNUM:
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val = extract_unsigned_integer (buf, 4, gdbarch_byte_order (gdbarch));
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val <<= 1;
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regcache_raw_write_unsigned (regcache, AVR_PC_REGNUM, val);
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break;
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default:
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internal_error (__FILE__, __LINE__, _("invalid regnum"));
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}
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}
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/* Function: avr_scan_prologue
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@ -1036,9 +1085,9 @@ avr_frame_prev_register (struct frame_info *this_frame,
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struct avr_unwind_cache *info
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= avr_frame_unwind_cache (this_frame, this_prologue_cache);
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if (regnum == AVR_PC_REGNUM)
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if (regnum == AVR_PC_REGNUM || regnum == AVR_PSEUDO_PC_REGNUM)
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{
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if (trad_frame_addr_p (info->saved_regs, regnum))
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if (trad_frame_addr_p (info->saved_regs, AVR_PC_REGNUM))
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{
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/* Reading the return PC from the PC register is slightly
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abnormal. register_size(AVR_PC_REGNUM) says it is 4 bytes,
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@ -1058,14 +1107,18 @@ avr_frame_prev_register (struct frame_info *this_frame,
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struct gdbarch *gdbarch = get_frame_arch (this_frame);
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struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
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read_memory (info->saved_regs[regnum].addr, buf, tdep->call_length);
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read_memory (info->saved_regs[AVR_PC_REGNUM].addr,
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buf, tdep->call_length);
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/* Extract the PC read from memory as a big-endian. */
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pc = 0;
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for (i = 0; i < tdep->call_length; i++)
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pc = (pc << 8) | buf[i];
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return frame_unwind_got_constant (this_frame, regnum, pc << 1);
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if (regnum == AVR_PC_REGNUM)
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pc <<= 1;
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return frame_unwind_got_constant (this_frame, regnum, pc);
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}
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return frame_unwind_got_optimized (this_frame, regnum);
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@ -1327,6 +1380,14 @@ avr_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
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tdep->call_length = call_length;
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/* Create a type for PC. We can't use builtin types here, as they may not
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be defined. */
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tdep->void_type = arch_type (gdbarch, TYPE_CODE_VOID, 1, "void");
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tdep->func_void_type = make_function_type (tdep->void_type, NULL);
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tdep->pc_type = arch_type (gdbarch, TYPE_CODE_PTR, 4, NULL);
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TYPE_TARGET_TYPE (tdep->pc_type) = tdep->func_void_type;
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TYPE_UNSIGNED (tdep->pc_type) = 1;
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set_gdbarch_short_bit (gdbarch, 2 * TARGET_CHAR_BIT);
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set_gdbarch_int_bit (gdbarch, 2 * TARGET_CHAR_BIT);
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set_gdbarch_long_bit (gdbarch, 4 * TARGET_CHAR_BIT);
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@ -1353,6 +1414,10 @@ avr_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
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set_gdbarch_register_name (gdbarch, avr_register_name);
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set_gdbarch_register_type (gdbarch, avr_register_type);
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set_gdbarch_num_pseudo_regs (gdbarch, AVR_NUM_PSEUDO_REGS);
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set_gdbarch_pseudo_register_read (gdbarch, avr_pseudo_register_read);
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set_gdbarch_pseudo_register_write (gdbarch, avr_pseudo_register_write);
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set_gdbarch_return_value (gdbarch, avr_return_value);
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set_gdbarch_print_insn (gdbarch, print_insn_avr);
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