470 lines
15 KiB
C
470 lines
15 KiB
C
/* Definitions to make GDB run on an encore under umax 4.2
|
||
Copyright (C) 1987, 1989 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.
|
||
|
||
$Id: m-umax.h,v 1.2 1993/08/02 17:40:10 mycroft Exp $
|
||
*/
|
||
|
||
#ifndef ns16000
|
||
#define ns16000
|
||
#endif
|
||
|
||
#define HAVE_WAIT_STRUCT
|
||
|
||
/* Define the bit, byte, and word ordering of the machine. */
|
||
/* #define BITS_BIG_ENDIAN */
|
||
/* #define BYTES_BIG_ENDIAN */
|
||
/* #define WORDS_BIG_ENDIAN */
|
||
|
||
/* Encore's modifications to ptrace format */
|
||
|
||
#define UMAX_PTRACE
|
||
|
||
/* Encore's modifications to core-file format */
|
||
|
||
#define UMAX_CORE
|
||
|
||
/* Do implement the attach and detach commands. */
|
||
|
||
#define ATTACH_DETACH
|
||
|
||
/* Define this if the C compiler puts an underscore at the front
|
||
of external names before giving them to the linker. */
|
||
|
||
#define NAMES_HAVE_UNDERSCORE
|
||
|
||
/* Exec files and symbol tables are in COFF format */
|
||
|
||
#define COFF_FORMAT
|
||
|
||
/* Doesn't have siginterupt. */
|
||
#define NO_SIGINTERRUPT
|
||
|
||
/* 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(pc) \
|
||
{ register unsigned char op = read_memory_integer (pc, 1); \
|
||
if (op == 0x82) { op = read_memory_integer (pc+2,1); \
|
||
if ((op & 0x80) == 0) pc += 3; \
|
||
else if ((op & 0xc0) == 0x80) pc += 4; \
|
||
else pc += 6; \
|
||
} \
|
||
}
|
||
|
||
/* 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 (0xfffff000)
|
||
|
||
/* Stack grows downward. */
|
||
|
||
#define INNER_THAN <
|
||
|
||
/* Sequence of bytes for breakpoint instruction. */
|
||
|
||
#define BREAKPOINT {0xf2}
|
||
|
||
/* 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 0
|
||
|
||
/* Nonzero if instruction at PC is a return instruction. */
|
||
|
||
#define ABOUT_TO_RETURN(pc) (read_memory_integer (pc, 1) == 0x12)
|
||
|
||
#ifndef NaN
|
||
#include <nan.h>
|
||
#endif NaN
|
||
|
||
/* Return 1 if P points to an invalid floating point value. */
|
||
|
||
#define INVALID_FLOAT(p, s) \
|
||
((s == sizeof (float))? \
|
||
NaF (*(float *) p) : \
|
||
NaD (*(double *) p))
|
||
|
||
/* 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 25
|
||
|
||
#define NUM_GENERAL_REGS 8
|
||
|
||
/* Initializer for an array of names of registers.
|
||
There should be NUM_REGS strings in this initializer. */
|
||
|
||
#define REGISTER_NAMES {"r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", \
|
||
"f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7", \
|
||
"sp", "fp", "pc", "ps", \
|
||
"fsr", \
|
||
"l0", "l1", "l2", "l3", "xx", \
|
||
}
|
||
|
||
/* 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 FP0_REGNUM 8 /* Floating point register 0 */
|
||
#define SP_REGNUM 16 /* Contains address of top of stack */
|
||
#define AP_REGNUM FP_REGNUM
|
||
#define FP_REGNUM 17 /* Contains address of executing stack frame */
|
||
#define PC_REGNUM 18 /* Contains program counter */
|
||
#define PS_REGNUM 19 /* Contains processor status */
|
||
#define FPS_REGNUM 20 /* Floating point status register */
|
||
#define LP0_REGNUM 21 /* Double register 0 (same as FP0) */
|
||
|
||
/* called from register_addr() -- blockend not used for now */
|
||
#define REGISTER_U_ADDR(addr, blockend, regno) \
|
||
{ \
|
||
switch (regno) { \
|
||
case 0: case 1: case 2: case 3: case 4: case 5: case 6: case 7: \
|
||
addr = PU_R0 - (regno * sizeof (int)); break; \
|
||
case SP_REGNUM: \
|
||
addr = PU_SP; break; \
|
||
case PC_REGNUM: \
|
||
addr = PU_PC; break; \
|
||
case FP_REGNUM: \
|
||
addr = PU_FP; break; \
|
||
case PS_REGNUM: \
|
||
addr = PU_PSL; break; \
|
||
case FPS_REGNUM: \
|
||
addr = PU_FSR; break; \
|
||
case FP0_REGNUM + 0: case FP0_REGNUM + 1: \
|
||
case FP0_REGNUM + 2: case FP0_REGNUM + 3: \
|
||
case FP0_REGNUM + 4: case FP0_REGNUM + 5: \
|
||
case FP0_REGNUM + 6: case FP0_REGNUM + 7: \
|
||
addr = PU_F0 + (regno - FP0_REGNUM) * sizeof (float); break; \
|
||
case LP0_REGNUM + 0: case LP0_REGNUM + 1: \
|
||
case LP0_REGNUM + 2: case LP0_REGNUM + 3: \
|
||
addr = PU_F0 + (regno - LP0_REGNUM) * sizeof (double); break; \
|
||
default: \
|
||
printf ("bad argument to REGISTER_U_ADDR %d\n", regno); \
|
||
abort (); \
|
||
} \
|
||
}
|
||
|
||
/* Total amount of space needed to store our copies of the machine's
|
||
register state, the array `registers'. */
|
||
#define REGISTER_BYTES ((NUM_REGS - 4) * sizeof (int) + 4 * sizeof (double))
|
||
|
||
/* Index within `registers' of the first byte of the space for
|
||
register N. */
|
||
|
||
#define REGISTER_BYTE(N) ((N) >= LP0_REGNUM ? \
|
||
LP0_REGNUM * 4 + ((N) - LP0_REGNUM) * 8 : (N) * 4)
|
||
|
||
/* Number of bytes of storage in the actual machine representation
|
||
for register N. On the 32000, all regs are 4 bytes
|
||
except for the doubled floating registers. */
|
||
|
||
#define REGISTER_RAW_SIZE(N) ((N) >= LP0_REGNUM ? 8 : 4)
|
||
|
||
/* Number of bytes of storage in the program's representation
|
||
for register N. On the 32000, all regs are 4 bytes
|
||
except for the doubled floating registers. */
|
||
|
||
#define REGISTER_VIRTUAL_SIZE(N) ((N) >= LP0_REGNUM ? 8 : 4)
|
||
|
||
/* Largest value REGISTER_RAW_SIZE can have. */
|
||
|
||
#define MAX_REGISTER_RAW_SIZE 8
|
||
|
||
/* 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) 0
|
||
|
||
/* Convert data from raw format for register REGNUM
|
||
to virtual format for register REGNUM. */
|
||
|
||
#define REGISTER_CONVERT_TO_VIRTUAL(REGNUM,FROM,TO) \
|
||
bcopy ((FROM), (TO), REGISTER_VIRTUAL_SIZE(REGNUM));
|
||
|
||
/* Convert data from virtual format for register REGNUM
|
||
to raw format for register REGNUM. */
|
||
|
||
#define REGISTER_CONVERT_TO_RAW(REGNUM,FROM,TO) \
|
||
bcopy ((FROM), (TO), REGISTER_VIRTUAL_SIZE(REGNUM));
|
||
|
||
/* Return the GDB type object for the "standard" data type
|
||
of data in register N. */
|
||
|
||
#define REGISTER_VIRTUAL_TYPE(N) \
|
||
(((N) < FP0_REGNUM) ? \
|
||
builtin_type_int : \
|
||
((N) < FP0_REGNUM + 8) ? \
|
||
builtin_type_float : \
|
||
((N) < LP0_REGNUM) ? \
|
||
builtin_type_int : \
|
||
builtin_type_double)
|
||
|
||
/* Store the address of the place in which to copy the structure the
|
||
subroutine will return. This is called from call_function.
|
||
|
||
On this machine this is a no-op, because gcc isn't used on it
|
||
yet. So this calling convention is not used. */
|
||
|
||
#define STORE_STRUCT_RETURN(ADDR, SP)
|
||
|
||
/* 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 : 0), 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 : 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) (*(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. */
|
||
|
||
/* In the case of the ns32000 series, the frame's nominal address is the FP
|
||
value, and at that address is saved previous FP value as a 4-byte word. */
|
||
|
||
#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. */
|
||
|
||
#define FRAME_SAVED_PC(FRAME) (read_memory_integer ((FRAME)->frame + 4, 4))
|
||
|
||
/* Compute base of arguments. */
|
||
|
||
#define FRAME_ARGS_ADDRESS(fi) \
|
||
((ns32k_get_enter_addr ((fi)->pc) > 1) ? \
|
||
((fi)->frame) : (read_register (SP_REGNUM) - 4))
|
||
|
||
#define FRAME_LOCALS_ADDRESS(fi) ((fi)->frame)
|
||
|
||
/* Get the address of the enter opcode for this function, if it is active.
|
||
Returns positive address > 1 if pc is between enter/exit,
|
||
1 if pc before enter or after exit, 0 otherwise. */
|
||
|
||
#ifndef CORE_ADDR
|
||
#include "defs.h" /* Make sure CORE_ADDR is defined. */
|
||
#endif
|
||
|
||
extern CORE_ADDR ns32k_get_enter_addr ();
|
||
|
||
/* Return number of args passed to a frame.
|
||
Can return -1, meaning no way to tell.
|
||
Encore's C compiler often reuses same area on stack for args,
|
||
so this will often not work properly. If the arg names
|
||
are known, it's likely most of them will be printed. */
|
||
|
||
#define FRAME_NUM_ARGS(numargs, fi) \
|
||
{ CORE_ADDR pc; \
|
||
CORE_ADDR enter_addr; \
|
||
unsigned int insn; \
|
||
unsigned int addr_mode; \
|
||
int width; \
|
||
\
|
||
numargs = -1; \
|
||
enter_addr = ns32k_get_enter_addr ((fi)->pc); \
|
||
if (enter_addr > 0) \
|
||
{ \
|
||
pc = (enter_addr == 1) ? \
|
||
SAVED_PC_AFTER_CALL (fi) : \
|
||
FRAME_SAVED_PC (fi); \
|
||
insn = read_memory_integer (pc,2); \
|
||
addr_mode = (insn >> 11) & 0x1f; \
|
||
insn = insn & 0x7ff; \
|
||
if ((insn & 0x7fc) == 0x57c && \
|
||
addr_mode == 0x14) /* immediate */ \
|
||
{ \
|
||
if (insn == 0x57c) /* adjspb */ \
|
||
width = 1; \
|
||
else if (insn == 0x57d) /* adjspw */ \
|
||
width = 2; \
|
||
else if (insn == 0x57f) /* adjspd */ \
|
||
width = 4; \
|
||
numargs = read_memory_integer (pc+2,width); \
|
||
if (width > 1) \
|
||
flip_bytes (&numargs, width); \
|
||
numargs = - sign_extend (numargs, width*8) / 4;\
|
||
} \
|
||
} \
|
||
}
|
||
|
||
/* 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) \
|
||
{ \
|
||
register int regmask, regnum; \
|
||
int localcount; \
|
||
register CORE_ADDR enter_addr; \
|
||
register CORE_ADDR next_addr; \
|
||
\
|
||
bzero (&(frame_saved_regs), sizeof (frame_saved_regs)); \
|
||
enter_addr = ns32k_get_enter_addr ((frame_info)->pc); \
|
||
if (enter_addr > 1) \
|
||
{ \
|
||
regmask = read_memory_integer (enter_addr+1, 1) & 0xff; \
|
||
localcount = ns32k_localcount (enter_addr); \
|
||
next_addr = (frame_info)->frame + localcount; \
|
||
for (regnum = 0; regnum < 8; regnum++, regmask >>= 1) \
|
||
(frame_saved_regs).regs[regnum] = (regmask & 1) ? \
|
||
(next_addr -= 4) : 0; \
|
||
(frame_saved_regs).regs[SP_REGNUM] = (frame_info)->frame + 4;\
|
||
(frame_saved_regs).regs[PC_REGNUM] = (frame_info)->frame + 4;\
|
||
(frame_saved_regs).regs[FP_REGNUM] = \
|
||
(read_memory_integer ((frame_info)->frame, 4));\
|
||
} \
|
||
else if (enter_addr == 1) \
|
||
{ \
|
||
CORE_ADDR sp = read_register (SP_REGNUM); \
|
||
(frame_saved_regs).regs[PC_REGNUM] = sp; \
|
||
(frame_saved_regs).regs[SP_REGNUM] = sp + 4; \
|
||
} \
|
||
}
|
||
|
||
/* Compensate for lack of `vprintf' function. */
|
||
#ifndef HAVE_VPRINTF
|
||
#define vprintf(format, ap) _doprnt (format, ap, stdout)
|
||
#endif /* not HAVE_VPRINTF */
|
||
|
||
/* Things needed for making the inferior call functions. */
|
||
|
||
/* Push an empty stack frame, to record the current PC, etc. */
|
||
|
||
#define PUSH_DUMMY_FRAME \
|
||
{ register CORE_ADDR sp = read_register (SP_REGNUM);\
|
||
register int regnum; \
|
||
sp = push_word (sp, read_register (PC_REGNUM)); \
|
||
sp = push_word (sp, read_register (FP_REGNUM)); \
|
||
write_register (FP_REGNUM, sp); \
|
||
for (regnum = 0; regnum < 8; regnum++) \
|
||
sp = push_word (sp, read_register (regnum)); \
|
||
write_register (SP_REGNUM, sp); \
|
||
}
|
||
|
||
/* Discard from the stack the innermost frame, restoring all registers. */
|
||
|
||
#define POP_FRAME \
|
||
{ register FRAME frame = get_current_frame (); \
|
||
register CORE_ADDR fp; \
|
||
register int regnum; \
|
||
struct frame_saved_regs fsr; \
|
||
struct frame_info *fi; \
|
||
fi = get_frame_info (frame); \
|
||
fp = fi->frame; \
|
||
get_frame_saved_regs (fi, &fsr); \
|
||
for (regnum = 0; regnum < 8; regnum++) \
|
||
if (fsr.regs[regnum]) \
|
||
write_register (regnum, read_memory_integer (fsr.regs[regnum], 4)); \
|
||
write_register (FP_REGNUM, read_memory_integer (fp, 4)); \
|
||
write_register (PC_REGNUM, read_memory_integer (fp + 4, 4)); \
|
||
write_register (SP_REGNUM, fp + 8); \
|
||
flush_cached_frames (); \
|
||
set_current_frame (create_new_frame (read_register (FP_REGNUM),\
|
||
read_pc ())); }
|
||
|
||
/* This sequence of words is the instructions
|
||
enter 0xff,0 82 ff 00
|
||
jsr @0x00010203 7f ae c0 01 02 03
|
||
adjspd 0x69696969 7f a5 01 02 03 04
|
||
bpt f2
|
||
Note this is 16 bytes. */
|
||
|
||
#define CALL_DUMMY { 0x7f00ff82, 0x0201c0ae, 0x01a57f03, 0xf2040302 }
|
||
|
||
#define CALL_DUMMY_START_OFFSET 3
|
||
#define CALL_DUMMY_LENGTH 16
|
||
#define CALL_DUMMY_ADDR 5
|
||
#define CALL_DUMMY_NARGS 11
|
||
|
||
/* 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, type) \
|
||
{ \
|
||
int flipped; \
|
||
flipped = fun | 0xc0000000; \
|
||
flip_bytes (&flipped, 4); \
|
||
*((int *) (((char *) dummyname)+CALL_DUMMY_ADDR)) = flipped; \
|
||
flipped = - nargs * 4; \
|
||
flip_bytes (&flipped, 4); \
|
||
*((int *) (((char *) dummyname)+CALL_DUMMY_NARGS)) = flipped; \
|
||
}
|