+Thu Mar 25 12:26:50 1993 Stu Grossman (grossman@cygnus.com)
+
+ * findvar.c (read_register, write_register): Make these capable
+ of reading/writing registers that are shorter than REGISTER_TYPE.
+ * (value_from_register): Install H8500 specific code to return
+ proper value when register is being used as a pointer.
+ * h8500-tdep.c: Remove extra defines of NUM_REGS.
+ (h8500_skip_prologue): Use correct lengths for LINK instructions.
+ (FRAME_CHAIN): Change name to h8500_frame_chain. Rewrite code to
+ chain frames properly by combining frame pointer with T reg.
+ (init_extra_frame_info): Delete. It's now a macro.
+ (frame_args_address): Don't add PTR_SIZE. Stack args are already
+ offset by the correct amount off of the frame pointer.
+ (register_byte): Delete. It's now a macro.
+ (register_raw_size, register_virtual_size): Delete. Replaced by
+ common routine h8500_register_size, cuz there's no difference
+ between the raw & virtual sizes on this machine.
+ (register_convert_to_raw, register_convert_to_virtual): Delete,
+ cuz there's no difference between the raw & virtual forms.
+ Replaced by memcpy in tm file.
+ (register_virtual_type): Rename to h8500_register_virtual_type.
+ Get rid of pointer pseudo-regs, use _REGNUM with all reg names.
+ (_initialize_h8500_tdep): Get rid of crock to ensure that GDB &
+ emulator have same reg offsets. This is all handled in the
+ simulator code now.
+ (h8500_trapped_internalvar): New routine to detect references to
+ convenience vars acting as pointer pseudo-regs.
+ (h8500_value_trapped_internalvar): Conjure up value of pointer
+ pseudo-regs.
+ (h8500_set_trapped_internalvar): Convert set value in real
+ register references.
+ infcmd.c (read_pc, write_pc): Add h8500 specific code to handle
+ code segment register.
+ infrun.c (proceed): Simplify. Call write_pc instead of doing it
+ by hand.
+ (wait_for_inferior): Add h8500 specific code to add stack segment
+ when reading SP register.
+ remote-sim.c (fetch_register): Spacing.
+ tm-h8500.h: #define GDB_TARGET_IS_H8500 to make it easier to
+ detect cruft. Redo all register manipulation stuff. Get rid of
+ pointer pseudo-regs. (INIT_EXTRA_FRAME_INFO): Adds stack segment
+ to frame pointer. (IS_TRAPPED_INTERNALVAL,
+ VALUE_OF_TRAPPED_INTERNALVAR, SET_TRAPPED_INTERNALVAR): Use these
+ to create internal vars for pointer pseudo-regs.
+
Thu Mar 25 10:10:28 1993 Fred Fish (fnf@cygnus.com)
* Makefile.in: Numerous small changes to macro definitions
#include "symtab.h"
#include "gdbtypes.h"
#include "gdbcmd.h"
+#include "value.h"
#include "dis-asm.h"
#include "../opcodes/h8500-opc.h"
;
-#undef NUM_REGS
-#define NUM_REGS 11
#define UNSIGNED_SHORT(X) ((X) & 0xffff)
-
/* Shape of an H8/500 frame :
CORE_ADDR examine_prologue ();
void frame_find_saved_regs ();
+
+int regoff[NUM_REGS] = {0, 2, 4, 6, 8, 10, 12, 14, /* r0->r7 */
+ 16, 18, /* ccr, pc */
+ 20, 21, 22, 23}; /* cp, dp, ep, tp */
+
CORE_ADDR
h8500_skip_prologue (start_pc)
CORE_ADDR start_pc;
{
short int w;
-
w = read_memory_integer (start_pc, 1);
if (w == LINK_8)
{
- start_pc ++;
+ start_pc += 2;
w = read_memory_integer (start_pc,1);
}
if (w == LINK_16)
{
- start_pc +=2;
+ start_pc += 3;
w = read_memory_integer (start_pc,2);
}
- /* Skip past a move to FP */
- if (IS_MOVE_FP (w))
- {
- start_pc += 2;
- w = read_memory_short (start_pc);
- }
-
- /* Skip the stack adjust */
-
- if (IS_MOVK_R5 (w))
- {
- start_pc += 2;
- w = read_memory_short (start_pc);
- }
- if (IS_SUB_R5SP (w))
- {
- start_pc += 2;
- w = read_memory_short (start_pc);
- }
- while (IS_SUB2_SP (w))
- {
- start_pc += 2;
- w = read_memory_short (start_pc);
- }
-
return start_pc;
-
}
int
the function prologue to determine the caller's sp value, and return it. */
FRAME_ADDR
-FRAME_CHAIN (thisframe)
+h8500_frame_chain (thisframe)
FRAME thisframe;
{
- static int loopcount;
- static int prevr;
- if (!inside_entry_file ((thisframe)->pc))
- {
- int v = read_memory_integer ((thisframe)->frame, PTR_SIZE) ;
- /* Detect loops in the stack */
- if (v == prevr) loopcount++;
- else loopcount = 0;
- v = prevr;
- if (loopcount > 5) return 0;
- }
- return 0;
+ if (!inside_entry_file (thisframe->pc))
+ return read_memory_integer(thisframe->frame, 2)
+ | (read_register(SEG_T_REGNUM) << 16);
+ else
+ return 0;
}
/* Put here the code to store, into a struct frame_saved_regs,
return (ip);
}
#endif
-#if 0
-void
-init_extra_frame_info (fromleaf, fi)
- int fromleaf;
- struct frame_info *fi;
-{
- fi->fsr = 0; /* Not yet allocated */
- fi->args_pointer = 0; /* Unknown */
- fi->locals_pointer = 0; /* Unknown */
- fi->from_pc = 0;
-
-}
-#endif
/* Return the saved PC from this frame. */
frame_saved_pc (frame)
FRAME frame;
{
- return read_memory_integer ((frame)->frame + 2, PTR_SIZE);
+ return read_memory_integer ((frame)->frame + 2, PTR_SIZE);
}
CORE_ADDR
frame_args_address (fi)
struct frame_info *fi;
{
- return fi->frame + PTR_SIZE; /* Skip the PC */
+ return fi->frame;
}
void
}
}
-
-
-#if 0
-register_byte (N)
-{
- return reginfo[N].offset;
-}
-#endif
-register_raw_size (N)
-{
- if (N <= R7) return 2;
- return 4;
-}
-
-register_virtual_size (N)
-{
- if (N <= R7) return 2;
- return 4;
-}
-
-
-
-register_convert_to_raw (regnum, from, to)
- int regnum;
- char *from;
- char *to;
-{
- switch (regnum)
- {
- case PR0:
- case PR1:
- case PR2:
- case PR3:
- case PR4:
- case PR5:
- case PR6:
- case PR7:
- case PC_REGNUM:
- to[0] = 0;
- to[1] = from[1];
- to[2] = from[2];
- to[3] = from[3];
- break;
- default:
- to[0] = from[0];
- to[1] = from[1];
- break;
- }
-}
-
-
-register_convert_to_virtual (regnum, from, to)
- int regnum;
- char *from;
- char *to;
+int
+h8500_register_size (regno)
+ int regno;
{
- switch (regnum)
- {
- case PR0:
- case PR1:
- case PR2:
- case PR3:
- case PR4:
- case PR5:
- case PR6:
- case PR7:
- case PC_REGNUM:
- to[0] = 0;
- to[1] = from[1];
- to[2] = from[2];
- to[3] = from[3];
- break;
- default:
- to[0] = from[0];
- to[1] = from[1];
- break;
- }
+ if (regno <= PC_REGNUM)
+ return 2;
+ else
+ return 1;
}
struct type *
-register_virtual_type (N)
+h8500_register_virtual_type (regno)
+ int regno;
{
- switch (N)
+ switch (regno)
{
- /* Although these are actually word size registers, we treat them
- like longs so that we can deal with any implicit segmentation */
- case PR0:
- case PR1:
- case PR2:
- case PR3:
- case PR4:
- case PR5:
- case PR6:
- case PR7:
- case PC_REGNUM:
- return builtin_type_unsigned_long;
- case SEG_C:
- case SEG_E:
- case SEG_D:
- case SEG_T:
+ case SEG_C_REGNUM:
+ case SEG_E_REGNUM:
+ case SEG_D_REGNUM:
+ case SEG_T_REGNUM:
return builtin_type_unsigned_char;
- case R0:
- case R1:
- case R2:
- case R3:
- case R4:
- case R5:
- case R6:
- case R7:
+ case R0_REGNUM:
+ case R1_REGNUM:
+ case R2_REGNUM:
+ case R3_REGNUM:
+ case R4_REGNUM:
+ case R5_REGNUM:
+ case R6_REGNUM:
+ case R7_REGNUM:
+ case PC_REGNUM:
case CCR_REGNUM:
return builtin_type_unsigned_short;
-
-
default:
abort();
}
}
-
-
-
/* Put here the code to store, into a struct frame_saved_regs,
the addresses of the saved registers of frame described by FRAME_INFO.
This includes special registers such as pc and fp saved in special
help_list (setmemorylist, "set memory ", -1, stdout);
}
+/* See if variable name is ppc or pr[0-7] */
-_initialize_h8500_tdep ()
+int
+h8500_is_trapped_internalvar (name)
+ char *name;
+{
+ if (name[0] != 'p')
+ return 0;
+
+ if (strcmp(name+1, "pc") == 0)
+ return 1;
+
+ if (name[1] == 'r'
+ && name[2] >= '0'
+ && name[2] <= '7'
+ && name[3] == '\000')
+ return 1;
+ else
+ return 0;
+}
+
+PTR
+h8500_value_of_trapped_internalvar (var)
+ struct internalvar *var;
+{
+ LONGEST regval;
+ unsigned char regbuf[4];
+ int page_regnum, regnum;
+
+ regnum = var->name[2] == 'c' ? PC_REGNUM : var->name[2] - '0';
+
+ switch (var->name[2])
+ {
+ case 'c':
+ page_regnum = SEG_C_REGNUM;
+ break;
+ case '0': case '1': case '2': case '3':
+ page_regnum = SEG_D_REGNUM;
+ break;
+ case '4': case '5':
+ page_regnum = SEG_E_REGNUM;
+ break;
+ case '6': case '7':
+ page_regnum = SEG_T_REGNUM;
+ break;
+ }
+
+ get_saved_register (regbuf, NULL, NULL, selected_frame, page_regnum, NULL);
+ regval = regbuf[0] << 16;
+
+ get_saved_register (regbuf, NULL, NULL, selected_frame, regnum, NULL);
+ regval |= regbuf[0] << 8 | regbuf[1]; /* XXX host/target byte order */
+
+ free (var->value); /* Free up old value */
+
+ var->value = value_from_longest (builtin_type_unsigned_long, regval);
+ release_value (var->value); /* Unchain new value */
+
+ VALUE_LVAL (var->value) = lval_internalvar;
+ VALUE_INTERNALVAR (var->value) = var;
+ return var->value;
+}
+
+void
+h8500_set_trapped_internalvar (var, newval, bitpos, bitsize, offset)
+ struct internalvar *var;
+ int offset, bitpos, bitsize;
+ value newval;
{
- /* Sanitity check a few things */
- if (FP_REGNUM != GPR6
- || SP_REGNUM != GPR7
- || CCR_REGNUM != GCCR
- || PC_REGNUM != GPC
- || SEG_C != GSEGC
- || SEG_D != GSEGD
- || SEG_E != GSEGE
- || SEG_T != GSEGT
- || PR0 != GPR0
- || PR1 != GPR1
- || PR2 != GPR2
- || PR3 != GPR3
- || PR4 != GPR4
- || PR5 != GPR5
- || PR6 != GPR6
- || PR7 != GPR7)
- abort ();
+ char *page_regnum, *regnum;
+ char expression[100];
+ unsigned new_regval;
+ struct type *type;
+ enum type_code newval_type_code;
+
+ type = VALUE_TYPE (newval);
+ newval_type_code = TYPE_CODE (type);
+
+ if ((newval_type_code != TYPE_CODE_INT
+ && newval_type_code != TYPE_CODE_PTR)
+ || TYPE_LENGTH (type) != sizeof(new_regval))
+ error("Illegal type (%s) for assignment to $%s\n",
+ TYPE_NAME (type), var->name);
+ new_regval = *(long *)VALUE_CONTENTS_RAW(newval);
+
+ regnum = var->name + 1;
+
+ switch (var->name[2])
+ {
+ case 'c':
+ page_regnum = "cp";
+ break;
+ case '0': case '1': case '2': case '3':
+ page_regnum = "dp";
+ break;
+ case '4': case '5':
+ page_regnum = "ep";
+ break;
+ case '6': case '7':
+ page_regnum = "tp";
+ break;
+ }
+
+ sprintf (expression, "$%s=%d", page_regnum, new_regval >> 16);
+ parse_and_eval(expression);
+
+ sprintf (expression, "$%s=%d", regnum, new_regval & 0xffff);
+ parse_and_eval(expression);
+}
+
+_initialize_h8500_tdep ()
+{
add_prefix_cmd ("memory", no_class, set_memory,
"set the memory model", &setmemorylist, "set memory ", 0,
&setlist);
--- /dev/null
+/* Parameters for execution on a H8/500 series machine.
+ Copyright (C) 1993 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., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+/* Contributed by Steve Chamberlain sac@cygnus.com */
+
+#define GDB_TARGET_IS_H8500
+
+#define IEEE_FLOAT 1
+
+/* Define the bit, byte, and word ordering of the machine. */
+
+#define TARGET_BYTE_ORDER BIG_ENDIAN
+
+#undef TARGET_INT_BIT
+#define TARGET_INT_BIT 16
+
+#undef TARGET_PTR_BIT
+#define TARGET_PTR_BIT (minimum_mode ? 16 : 32)
+
+
+/* Offset from address of function to start of its code.
+ Zero on most machines. */
+
+#define FUNCTION_START_OFFSET 0
+
+/* Advance PC across any function entry prologue instructions
+ to reach some "real" code. */
+
+#define SKIP_PROLOGUE(ip) {(ip) = h8500_skip_prologue(ip);}
+extern CORE_ADDR h8500_skip_prologue ();
+
+
+/* Immediately after a function call, return the saved pc.
+ Can't always go through the frames for this because on some machines
+ the new frame is not set up until the new function executes
+ some instructions. */
+
+#define SAVED_PC_AFTER_CALL(frame) saved_pc_after_call(frame)
+
+
+/* Stack grows downward. */
+
+#define INNER_THAN <
+
+/* Illegal instruction - used by the simulator for breakpoint
+ detection */
+#define BREAKPOINT {0x0b}
+
+
+/* If your kernel resets the pc after the trap happens you may need to
+ define this before including this file. */
+
+#define DECR_PC_AFTER_BREAK 0
+
+
+/* Nonzero if instruction at PC is a return instruction. */
+
+#define ABOUT_TO_RETURN(pc) about_to_return(pc)
+
+/* Return 1 if P points to an invalid floating point value. */
+
+#define INVALID_FLOAT(p, len) 0 /* Just a first guess; not checked */
+
+/* Say how long registers are. */
+
+#define REGISTER_TYPE unsigned long
+
+/* Say how much memory is needed to store a copy of the register set */
+
+#define REGISTER_BYTES (24)
+
+/* Index within `registers' of the first byte of the space for
+ register N. */
+
+int regoff[];
+#define REGISTER_BYTE(N) (regoff[N])
+
+/* Number of bytes of storage in the actual machine representation
+ for register N. */
+
+#define REGISTER_RAW_SIZE(N) h8500_register_size(N)
+int h8500_register_size PARAMS ((int regno));
+
+#define REGISTER_VIRTUAL_SIZE(N) h8500_register_size(N)
+
+/* Largest value REGISTER_RAW_SIZE can have. */
+
+#define MAX_REGISTER_RAW_SIZE 4
+
+/* Largest value REGISTER_VIRTUAL_SIZE can have. */
+
+#define MAX_REGISTER_VIRTUAL_SIZE 4
+
+/* Nonzero if register N requires conversion
+ from raw format to virtual format. */
+
+#define REGISTER_CONVERTIBLE(N) (0)
+
+/* Convert data from raw format for register REGNUM
+ to virtual format for register REGNUM. */
+
+#define REGISTER_CONVERT_TO_VIRTUAL(REGNUM,FROM,TO) \
+{ memcpy ((TO), (FROM), 4); }
+
+/* Convert data from virtual format for register REGNUM
+ to raw format for register REGNUM. */
+
+#define REGISTER_CONVERT_TO_RAW(REGNUM,FROM,TO) \
+{ memcpy ((TO), (FROM), 4); }
+
+/* Return the GDB type object for the "standard" data type
+ of data in register N. */
+
+#define REGISTER_VIRTUAL_TYPE(N) h8500_register_virtual_type(N)
+struct type *h8500_register_virtual_type PARAMS ((int regno));
+
+/* Initializer for an array of names of registers.
+ Entries beyond the first NUM_REGS are ignored. */
+
+#define REGISTER_NAMES \
+ {"r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", \
+ "ccr","pc", \
+ "cp","dp","ep","tp" }
+
+/* Register numbers of various important registers.
+ Note that some of these values are "real" register numbers,
+ and correspond to the general registers of the machine,
+ and some are "phony" register numbers which are too large
+ to be actual register numbers as far as the user is concerned
+ but do serve to get the desired values when passed to read_register. */
+
+
+#define R0_REGNUM 0
+#define R1_REGNUM 1
+#define R2_REGNUM 2
+#define R3_REGNUM 3
+#define R4_REGNUM 4
+#define R5_REGNUM 5
+#define R6_REGNUM 6
+#define R7_REGNUM 7
+
+#define SP_REGNUM R7_REGNUM /* Contains address of top of stack */
+#define FP_REGNUM R6_REGNUM /* Contains address of executing stack frame */
+
+#define CCR_REGNUM 8 /* Contains processor status */
+#define PC_REGNUM 9 /* Contains program counter */
+
+#define SEG_C_REGNUM 10 /* Segment registers */
+#define SEG_D_REGNUM 11
+#define SEG_E_REGNUM 12
+#define SEG_T_REGNUM 13
+
+#define NUM_REGS 14
+
+#define PTR_SIZE (minimum_mode ? 2: 4)
+#define PTR_MASK (minimum_mode ? 0x0000ffff : 0x00ffffff)
+
+/* Store the address of the place in which to copy the structure the
+ subroutine will return. This is called from call_function. */
+
+/*#define STORE_STRUCT_RETURN(ADDR, SP) \
+ { write_register (0, (ADDR)); abort(); }*/
+
+/* Extract from an array REGBUF containing the (raw) register state
+ a function return value of type TYPE, and copy that, in virtual format,
+ into VALBUF. */
+
+#define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \
+ bcopy ((char *)(REGBUF), VALBUF, TYPE_LENGTH(TYPE))
+
+
+/* Write into appropriate registers a function return value
+ of type TYPE, given in virtual format. Assumes floats are passed
+ in d0/d1. */
+
+
+#define STORE_RETURN_VALUE(TYPE,VALBUF) \
+ write_register_bytes (0, VALBUF, TYPE_LENGTH (TYPE))
+
+
+/* Extract from an array REGBUF containing the (raw) register state
+ the address in which a function should return its structure value,
+ as a CORE_ADDR (or an expression that can be used as one). */
+
+#define EXTRACT_STRUCT_VALUE_ADDRESS(REGBUF) (*(CORE_ADDR *)(REGBUF))
+\f
+
+/* Define other aspects of the stack frame. */
+
+/* A macro that tells us whether the function invocation represented
+ by FI does not have a frame on the stack associated with it. If it
+ does not, FRAMELESS is set to 1, else 0. */
+#define FRAMELESS_FUNCTION_INVOCATION(FI, FRAMELESS) \
+ (FRAMELESS) = frameless_look_for_prologue(FI)
+
+/* Any function with a frame looks like this
+ SECOND ARG
+ FIRST ARG
+ RET PC
+ SAVED R2
+ SAVED R3
+ SAVED FP <-FP POINTS HERE
+ LOCALS0
+ LOCALS1 <-SP POINTS HERE
+
+ */
+
+CORE_ADDR h8500_frame_chain PARAMS ((FRAME thisframe));
+
+#define INIT_EXTRA_FRAME_INFO(fromleaf, fci) \
+ (fci)->frame |= read_register(SEG_T_REGNUM) << 16;
+
+#define FRAME_CHAIN(FRAME) h8500_frame_chain(FRAME)
+
+#define FRAME_SAVED_PC(FRAME) frame_saved_pc(FRAME)
+
+#define FRAME_ARGS_ADDRESS(fi) frame_args_address(fi)
+
+#define FRAME_LOCALS_ADDRESS(fi) frame_locals_address(fi);
+
+/* Set VAL to the number of args passed to frame described by FI.
+ Can set VAL to -1, meaning no way to tell. */
+
+/* We can't tell how many args there are
+ now that the C compiler delays popping them. */
+
+#define FRAME_NUM_ARGS(val,fi) (val = -1)
+
+/* Return number of bytes at start of arglist that are not really args. */
+
+#define FRAME_ARGS_SKIP 0
+
+/* Put here the code to store, into a struct frame_saved_regs,
+ the addresses of the saved registers of frame described by FRAME_INFO.
+ This includes special registers such as pc and fp saved in special
+ ways in the stack frame. sp is even more special:
+ the address we return for it IS the sp for the next frame. */
+
+#define FRAME_FIND_SAVED_REGS(frame_info, frame_saved_regs) \
+ frame_find_saved_regs(frame_info, &(frame_saved_regs))
+\f
+
+/* Push an empty stack frame, to record the current PC, etc. */
+
+/*#define PUSH_DUMMY_FRAME { h8300_push_dummy_frame (); }*/
+
+/* Discard from the stack the innermost frame, restoring all registers. */
+
+#define POP_FRAME { h8300_pop_frame (); }
+
+#define SHORT_INT_MAX 32767
+#define SHORT_INT_MIN -32768
+
+
+
+#define BEFORE_MAIN_LOOP_HOOK \
+ hms_before_main_loop();
+
+
+#define NAMES_HAVE_UNDERSCORE
+
+typedef unsigned short INSN_WORD;
+
+#define ADDR_BITS_REMOVE(addr) ((addr) & 0xffffff)
+#define ADDR_BITS_SET(addr) (((addr)))
+
+#define read_memory_short(x) (read_memory_integer(x,2) & 0xffff)
+#define DONT_USE_REMOTE
+
+
+#define PRINT_REGISTER_HOOK(regno) print_register_hook(regno)
+
+int minimum_mode;
+
+#define CALL_DUMMY_LENGTH 10
+
+/* Fake variables to make it easy to use 24 bit register pointers */
+
+int h8500_is_trapped_internalvar PARAMS ((char *name));
+#define IS_TRAPPED_INTERNALVAR h8500_is_trapped_internalvar
+
+PTR h8500_value_of_trapped_internalvar PARAMS ((struct internalvar *var));
+#define VALUE_OF_TRAPPED_INTERNALVAR h8500_value_of_trapped_internalvar
+
+void h8500_set_trapped_internalvar PARAMS ((struct internalvar *var, value newval, int bitpos, int bitsize, int offset));
+#define SET_TRAPPED_INTERNALVAR h8500_set_trapped_internalvar
projects / deliverable / binutils-gdb.git / commitdiff
