mirror of
https://github.com/darlinghq/darling-gdb.git
synced 2024-11-29 15:00:34 +00:00
5e2e79f859
basis. See comments in objfiles.h and details in ChangeLog. Also remove redundant definitions of FRAME_CHAIN_VALID from most of the tm-* files and use a default definition in frame.h.
317 lines
9.9 KiB
C
317 lines
9.9 KiB
C
/* 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; \
|
||
}
|