Johns release

1 files changed, 305 insertions, 0 deletions

diff --git a/gdb/tm-sun386.h b/gdb/tm-sun386.h
new file mode 100644
index 0000000..60c8986
--- /dev/null
+++ b/gdb/tm-sun386.h
@@ -0,0 +1,305 @@
+/* Parameters for execution on a Sun 386i, for GDB, the GNU debugger.
+   Copyright (C) 1986, 1987 Free Software Foundation, Inc.
+
+This file is part of GDB.
+
+GDB 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 1, or (at your option)
+any later version.
+
+GDB 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 GDB; see the file COPYING.  If not, write to
+the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
+
+#define TARGET_BYTE_ORDER LITTLE_ENDIAN
+
+#ifndef sun386
+#define sun386
+#endif
+#define SUNOS4
+#define USE_MACHINE_REG_H
+
+/* Perhaps some day this will work even without the following #define */
+#define COFF_ENCAPSULATE
+
+#ifdef COFF_ENCAPSULATE
+#define NAMES_HAVE_UNDERSCORE
+/* Avoid conflicts between "a.out.gnu.h" and <sys/exec.h> */
+#define _EXEC_
+#endif
+
+#define BROKEN_LARGE_ALLOCA
+
+/* sun386 ptrace seems unable to change the frame pointer */
+#define PTRACE_FP_BUG
+
+/* Debugger information will be in DBX format.  */
+
+#define READ_DBX_FORMAT
+
+/* 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(frompc)   {(frompc) = i386_skip_prologue((frompc));}
+
+/* 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) \
+  (read_memory_integer (read_register (SP_REGNUM), 4))
+
+/* Address of end of stack space.  */
+
+#define STACK_END_ADDR 0xfc000000
+
+/* Stack grows downward.  */
+
+#define INNER_THAN <
+
+/* Sequence of bytes for breakpoint instruction.  */
+
+#define BREAKPOINT {0xcc}
+
+/* Amount PC must be decremented by after a breakpoint.
+   This is often the number of bytes in BREAKPOINT
+   but not always.  */
+
+#define DECR_PC_AFTER_BREAK 1
+
+/* Nonzero if instruction at PC is a return instruction.  */
+
+#define ABOUT_TO_RETURN(pc) (read_memory_integer (pc, 1) == 0xc3)
+
+/* Return 1 if P points to an invalid floating point value.
+   LEN is the length in bytes -- not relevant on the 386.  */
+
+#define INVALID_FLOAT(p, len) (0)
+
+/* Largest integer type */
+#define LONGEST long
+
+/* Name of the builtin type for the LONGEST type above. */
+#define BUILTIN_TYPE_LONGEST builtin_type_long
+
+/* Say how long (ordinary) registers are.  */
+
+#define REGISTER_TYPE long
+
+/* Number of machine registers */
+
+#define NUM_REGS 35
+
+/* Initializer for an array of names of registers.
+   There should be NUM_REGS strings in this initializer.  */
+
+/* the order of the first 8 registers must match the compiler's
+ * numbering scheme (which is the same as the 386 scheme)
+ * also, this table must match regmap in i386-pinsn.c.
+ */
+#define REGISTER_NAMES { "gs", "fs", "es", "ds",		\
+			 "edi", "esi", "ebp", "esp",		\
+			 "ebx", "edx", "ecx", "eax",		\
+			 "retaddr", "trapnum", "errcode", "ip",	\
+			 "cs", "ps", "sp", "ss",		\
+			 "fst0", "fst1", "fst2", "fst3",	\
+			 "fst4", "fst5", "fst6", "fst7",	\
+			 "fctrl", "fstat", "ftag", "fip",	\
+			 "fcs", "fopoff", "fopsel"		\
+			 }
+
+/* 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 FP_REGNUM 6		/* Contains address of executing stack frame */
+#define SP_REGNUM 18		/* Contains address of top of stack */
+#define PS_REGNUM 17		/* Contains processor status */
+#define PC_REGNUM 15		/* Contains program counter */
+#define FP0_REGNUM 20		/* Floating point register 0 */
+#define FPC_REGNUM 28		/* 80387 control register */
+
+/* Total amount of space needed to store our copies of the machine's
+   register state, the array `registers'.  */
+#define REGISTER_BYTES (20*4+8*10+7*4)
+
+/* Index within `registers' of the first byte of the space for
+   register N.  */
+
+#define REGISTER_BYTE(N) \
+ ((N) >= FPC_REGNUM ? (((N) - FPC_REGNUM) * 4) + 160	\
+  : (N) >= FP0_REGNUM ? (((N) - FP0_REGNUM) * 10) + 80	\
+  : (N) * 4)
+
+/* Number of bytes of storage in the actual machine representation
+   for register N.  */
+
+#define REGISTER_RAW_SIZE(N) (((unsigned)((N) - FP0_REGNUM)) < 8 ? 10 : 4)
+
+/* Number of bytes of storage in the program's representation
+   for register N. */
+
+#define REGISTER_VIRTUAL_SIZE(N) (((unsigned)((N) - FP0_REGNUM)) < 8 ? 8 : 4)
+
+/* Largest value REGISTER_RAW_SIZE can have.  */
+
+#define MAX_REGISTER_RAW_SIZE 10
+
+/* Largest value REGISTER_VIRTUAL_SIZE can have.  */
+
+#define MAX_REGISTER_VIRTUAL_SIZE 8
+
+/* Nonzero if register N requires conversion
+   from raw format to virtual format.  */
+
+#define REGISTER_CONVERTIBLE(N) (((unsigned)((N) - FP0_REGNUM)) < 8)
+
+/* Convert data from raw format for register REGNUM
+   to virtual format for register REGNUM.  */
+
+#define REGISTER_CONVERT_TO_VIRTUAL(REGNUM,FROM,TO) 	\
+{ if ((REGNUM) >= FP0_REGNUM && (REGNUM) < FPC_REGNUM)	\
+    i387_to_double ((FROM), (TO));			\
+  else							\
+    bcopy ((FROM), (TO), 4); }
+
+/* Convert data from virtual format for register REGNUM
+   to raw format for register REGNUM.  */
+
+#define REGISTER_CONVERT_TO_RAW(REGNUM,FROM,TO) 	\
+{ if ((REGNUM) >= FP0_REGNUM && (REGNUM) < FPC_REGNUM)	\
+    double_to_i387 ((FROM), (TO));	\
+  else					\
+    bcopy ((FROM), (TO), 4); }
+
+/* Return the GDB type object for the "standard" data type
+   of data in register N.  */
+
+#define REGISTER_VIRTUAL_TYPE(N) \
+ (((unsigned)((N) - FP0_REGNUM)) < 8 ? builtin_type_double : builtin_type_int)
+
+/* 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) \
+  { (SP) -= sizeof (ADDR);		\
+    write_memory ((SP), &(ADDR), sizeof (ADDR)); }
+
+/* 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 (REGBUF + REGISTER_BYTE (TYPE_CODE (TYPE) == TYPE_CODE_FLT ? FP0_REGNUM : 11), VALBUF, TYPE_LENGTH (TYPE))
+
+/* Write into appropriate registers a function return value
+   of type TYPE, given in virtual format.  */
+
+#define STORE_RETURN_VALUE(TYPE,VALBUF) \
+  write_register_bytes (REGISTER_BYTE (TYPE_CODE (TYPE) == TYPE_CODE_FLT ? FP0_REGNUM : 11), 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) (*(int *)(REGBUF))
+
+/* Describe the pointer in each stack frame to the previous stack frame
+   (its caller).  */
+
+/* FRAME_CHAIN takes a frame's nominal address
+   and produces the frame's chain-pointer.
+
+   FRAME_CHAIN_COMBINE takes the chain pointer and the frame's nominal address
+   and produces the nominal address of the caller frame.
+
+   However, if FRAME_CHAIN_VALID returns zero,
+   it means the given frame is the outermost one and has no caller.
+   In that case, FRAME_CHAIN_COMBINE is not used.  */
+
+#define FRAME_CHAIN(thisframe) \
+  (outside_startup_file ((thisframe)->pc) ? \
+   read_memory_integer ((thisframe)->frame, 4) :\
+   0)
+
+#define FRAME_CHAIN_VALID(chain, thisframe) \
+  (chain != 0 && (outside_startup_file (FRAME_SAVED_PC (thisframe))))
+
+#define FRAME_CHAIN_COMBINE(chain, thisframe) (chain)
+
+/* 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); }
+
+#define FRAME_SAVED_PC(FRAME) (read_memory_integer ((FRAME)->frame + 4, 4))
+
+#define FRAME_ARGS_ADDRESS(fi) ((fi)->frame)
+
+#define FRAME_LOCALS_ADDRESS(fi) ((fi)->frame)
+
+/* Return number of args passed to a frame.
+   Can return -1, meaning no way to tell.  */
+
+#define FRAME_NUM_ARGS(numargs, fi) (numargs) = i386_frame_num_args(fi)
+
+/* Return number of bytes at start of arglist that are not really args.  */
+
+#define FRAME_ARGS_SKIP 8
+
+/* 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) \
+{ i386_frame_find_saved_regs ((frame_info), &(frame_saved_regs)); }
+
+
+/* Things needed for making the inferior call functions.  */
+
+/* Push an empty stack frame, to record the current PC, etc.  */
+
+#define PUSH_DUMMY_FRAME { i386_push_dummy_frame (); }
+
+/* Discard from the stack the innermost frame, restoring all registers.  */
+
+#define POP_FRAME  { i386_pop_frame (); }
+
+/* this is 
+ *   call 11223344 (32 bit relative)
+ *   int3
+ */
+
+#define CALL_DUMMY { 0x223344e8, 0xcc11 }
+
+#define CALL_DUMMY_LENGTH 8
+
+#define CALL_DUMMY_START_OFFSET 0  /* Start execution at beginning of dummy */
+
+/* Insert the specified number of args and function address
+   into a call sequence of the above form stored at DUMMYNAME.  */
+
+#define FIX_CALL_DUMMY(dummyname, pc, fun, nargs, args, type, gcc_p)   \
+{ \
+	*(int *)((char *)(dummyname) + 1) = (int)(fun) - (pc) - 5; \
+}