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- /* Parameters for a Sun 386i target machine, for GDB, the GNU debugger.
- Copyright 1986, 1987, 1991, 1992 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. */
-
- #define TARGET_BYTE_ORDER LITTLE_ENDIAN
-
- #ifndef sun386
- #define sun386
- #endif
- #define GDB_TARGET_IS_SUN386 1
- #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 our include files and <sys/exec.h>
- (maybe not needed anymore). */
- #define _EXEC_
- #endif
-
- /* sun386 ptrace seems unable to change the frame pointer */
- #define PTRACE_FP_BUG
-
- /* 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));}
-
- extern int
- i386_skip_prologue PARAMS ((int));
-
- /* 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); }
-
- extern void
- i387_to_double PARAMS ((char *, char *));
-
- /* 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); }
-
- extern void
- double_to_i387 PARAMS ((char *, char *));
-
- /* 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. */
-
- #define FRAME_CHAIN(thisframe) \
- (!inside_entry_file ((thisframe)->pc) ? \
- read_memory_integer ((thisframe)->frame, 4) :\
- 0)
-
- /* 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)
-
- #ifdef __STDC__ /* Forward decl's for prototypes */
- struct frame_info;
- struct frame_saved_regs;
- #endif
-
- extern int
- i386_frame_num_args PARAMS ((struct frame_info *));
-
- /* 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)); }
-
- extern void
- i386_frame_find_saved_regs PARAMS ((struct frame_info *,
- struct 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 (); }
-
- extern void
- i386_push_dummy_frame PARAMS ((void));
-
- /* Discard from the stack the innermost frame, restoring all registers. */
-
- #define POP_FRAME { i386_pop_frame (); }
-
- extern void
- i386_pop_frame PARAMS ((void));
-
- /* 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; \
- }
-