520 lines
19 KiB
C
520 lines
19 KiB
C
/*-
|
||
* This code is derived from software copyrighted by the Free Software
|
||
* Foundation.
|
||
*
|
||
* Modified 1991 by Donn Seeley at UUNET Technologies, Inc.
|
||
* Modified 1990 by Van Jacobson at Lawrence Berkeley Laboratory.
|
||
*
|
||
* from: @(#)m-sun3.h 6.3 (Berkeley) 5/8/91
|
||
* $Id: m-sun3.h,v 1.2 1993/08/01 18:48:31 mycroft Exp $
|
||
*/
|
||
|
||
/* Parameters for execution on a Sun, for GDB, the GNU debugger.
|
||
Copyright (C) 1986, 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. */
|
||
|
||
#ifndef sun3
|
||
#define sun3
|
||
#endif
|
||
|
||
/* Define the bit, byte, and word ordering of the machine. */
|
||
#define BITS_BIG_ENDIAN
|
||
#define BYTES_BIG_ENDIAN
|
||
#define WORDS_BIG_ENDIAN
|
||
|
||
/* Get rid of any system-imposed stack limit if possible. */
|
||
|
||
#define SET_STACK_LIMIT_HUGE
|
||
|
||
/* 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
|
||
|
||
/* 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(pc) \
|
||
{ register int op = read_memory_integer (pc, 2); \
|
||
if (op == 0047126) \
|
||
pc += 4; /* Skip link #word */ \
|
||
else if (op == 0044016) \
|
||
pc += 6; /* Skip link #long */ \
|
||
}
|
||
|
||
/* Immediately after a function call, return the saved pc.
|
||
Can't 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 0xf000000
|
||
|
||
/* Stack grows downward. */
|
||
|
||
#define INNER_THAN <
|
||
|
||
/* Sequence of bytes for breakpoint instruction. */
|
||
|
||
#define BREAKPOINT {0x4e, 0x4f}
|
||
|
||
/* 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 2
|
||
|
||
/* Nonzero if instruction at PC is a return instruction. */
|
||
/* Allow any of the return instructions, including a trapv and a return
|
||
from interupt. */
|
||
|
||
#define ABOUT_TO_RETURN(pc) ((read_memory_integer (pc, 2) & ~0x3) == 0x4e74)
|
||
|
||
/* Return 1 if P points to an invalid floating point value. */
|
||
|
||
#define INVALID_FLOAT(p, len) 0 /* Just a first guess; not checked */
|
||
|
||
/* 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 31
|
||
|
||
/* Initializer for an array of names of registers.
|
||
There should be NUM_REGS strings in this initializer. */
|
||
|
||
#define REGISTER_NAMES \
|
||
{"d0", "d1", "d2", "d3", "d4", "d5", "d6", "d7", \
|
||
"a0", "a1", "a2", "a3", "a4", "a5", "fp", "sp", \
|
||
"ps", "pc", \
|
||
"fp0", "fp1", "fp2", "fp3", "fp4", "fp5", "fp6", "fp7", \
|
||
"fpcontrol", "fpstatus", "fpiaddr", "fpcode", "fpflags" }
|
||
|
||
/* 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 14 /* Contains address of executing stack frame */
|
||
#define SP_REGNUM 15 /* Contains address of top of stack */
|
||
#define PS_REGNUM 16 /* Contains processor status */
|
||
#define PC_REGNUM 17 /* Contains program counter */
|
||
#define FP0_REGNUM 18 /* Floating point register 0 */
|
||
#define FPC_REGNUM 26 /* 68881 control register */
|
||
|
||
/* Total amount of space needed to store our copies of the machine's
|
||
register state, the array `registers'. */
|
||
#define REGISTER_BYTES (16*4+8*12+8+20)
|
||
|
||
/* Index within `registers' of the first byte of the space for
|
||
register N. */
|
||
|
||
#define REGISTER_BYTE(N) \
|
||
((N) >= FPC_REGNUM ? (((N) - FPC_REGNUM) * 4) + 168 \
|
||
: (N) >= FP0_REGNUM ? (((N) - FP0_REGNUM) * 12) + 72 \
|
||
: (N) * 4)
|
||
|
||
/* Number of bytes of storage in the actual machine representation
|
||
for register N. On the 68000, all regs are 4 bytes
|
||
except the floating point regs which are 12 bytes. */
|
||
/* Note that the unsigned cast here forces the result of the
|
||
subtractiion to very high positive values if N < FP0_REGNUM */
|
||
|
||
#define REGISTER_RAW_SIZE(N) (((unsigned)(N) - FP0_REGNUM) < 8 ? 12 : 4)
|
||
|
||
/* Number of bytes of storage in the program's representation
|
||
for register N. On the 68000, all regs are 4 bytes
|
||
except the floating point regs which are 8-byte doubles. */
|
||
|
||
#define REGISTER_VIRTUAL_SIZE(N) (((unsigned)(N) - FP0_REGNUM) < 8 ? 8 : 4)
|
||
|
||
/* Largest value REGISTER_RAW_SIZE can have. */
|
||
|
||
#define MAX_REGISTER_RAW_SIZE 12
|
||
|
||
/* 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) \
|
||
convert_from_68881 ((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) \
|
||
convert_to_68881 ((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) \
|
||
{ write_register (9, (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 ((char *)(REGBUF) + \
|
||
(TYPE_LENGTH (TYPE) < 4 ? 4 - TYPE_LENGTH (TYPE) : 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 (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))
|
||
|
||
/* Enable use of alternate code to read and write registers. */
|
||
|
||
#define NEW_SUN_PTRACE
|
||
|
||
/* Enable use of alternate code for Sun's format of core dump file. */
|
||
|
||
#define NEW_SUN_CORE
|
||
|
||
/* Do implement the attach and detach commands. */
|
||
|
||
#define ATTACH_DETACH
|
||
|
||
|
||
/* 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 Sun, the frame's nominal address
|
||
is the address of a 4-byte word containing the calling frame's address. */
|
||
|
||
#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_LOOK_FOR_PROLOGUE(FI, FRAMELESS)
|
||
|
||
#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)
|
||
|
||
/* 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)
|
||
|
||
#if 0
|
||
#define FRAME_NUM_ARGS(val, fi) \
|
||
{ register CORE_ADDR pc = FRAME_SAVED_PC (fi); \
|
||
register int insn = 0177777 & read_memory_integer (pc, 2); \
|
||
val = 0; \
|
||
if (insn == 0047757 || insn == 0157374) /* lea W(sp),sp or addaw #W,sp */ \
|
||
val = read_memory_integer (pc + 2, 2); \
|
||
else if ((insn & 0170777) == 0050217 /* addql #N, sp */ \
|
||
|| (insn & 0170777) == 0050117) /* addqw */ \
|
||
{ val = (insn >> 9) & 7; if (val == 0) val = 8; } \
|
||
else if (insn == 0157774) /* addal #WW, sp */ \
|
||
val = read_memory_integer (pc + 2, 4); \
|
||
val >>= 2; }
|
||
#endif
|
||
|
||
/* 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 regnum; \
|
||
register int regmask; \
|
||
register CORE_ADDR next_addr; \
|
||
register CORE_ADDR pc; \
|
||
int nextinsn; \
|
||
bzero (&frame_saved_regs, sizeof frame_saved_regs); \
|
||
if ((frame_info)->pc >= (frame_info)->frame - CALL_DUMMY_LENGTH - FP_REGNUM*4 - 8*12 - 4 \
|
||
&& (frame_info)->pc <= (frame_info)->frame) \
|
||
{ next_addr = (frame_info)->frame; \
|
||
pc = (frame_info)->frame - CALL_DUMMY_LENGTH - FP_REGNUM * 4 - 8*12 - 4; }\
|
||
else \
|
||
{ pc = get_pc_function_start ((frame_info)->pc); \
|
||
/* Verify we have a link a6 instruction next; \
|
||
if not we lose. If we win, find the address above the saved \
|
||
regs using the amount of storage from the link instruction. */\
|
||
if (044016 == read_memory_integer (pc, 2)) \
|
||
next_addr = (frame_info)->frame + read_memory_integer (pc += 2, 4), pc+=4; \
|
||
else if (047126 == read_memory_integer (pc, 2)) \
|
||
next_addr = (frame_info)->frame + read_memory_integer (pc += 2, 2), pc+=2; \
|
||
else goto lose; \
|
||
/* If have an addal #-n, sp next, adjust next_addr. */ \
|
||
if ((0177777 & read_memory_integer (pc, 2)) == 0157774) \
|
||
next_addr += read_memory_integer (pc += 2, 4), pc += 4; \
|
||
} \
|
||
/* next should be a moveml to (sp) or -(sp) or a movl r,-(sp) */ \
|
||
regmask = read_memory_integer (pc + 2, 2); \
|
||
/* But before that can come an fmovem. Check for it. */ \
|
||
nextinsn = 0xffff & read_memory_integer (pc, 2); \
|
||
if (0xf227 == nextinsn \
|
||
&& (regmask & 0xff00) == 0xe000) \
|
||
{ pc += 4; /* Regmask's low bit is for register fp7, the first pushed */ \
|
||
for (regnum = FP0_REGNUM + 7; regnum >= FP0_REGNUM; regnum--, regmask >>= 1) \
|
||
if (regmask & 1) \
|
||
(frame_saved_regs).regs[regnum] = (next_addr -= 12); \
|
||
regmask = read_memory_integer (pc + 2, 2); } \
|
||
if (0044327 == read_memory_integer (pc, 2)) \
|
||
{ pc += 4; /* Regmask's low bit is for register 0, the first written */ \
|
||
for (regnum = 0; regnum < 16; regnum++, regmask >>= 1) \
|
||
if (regmask & 1) \
|
||
(frame_saved_regs).regs[regnum] = (next_addr += 4) - 4; } \
|
||
else if (0044347 == read_memory_integer (pc, 2)) \
|
||
{ pc += 4; /* Regmask's low bit is for register 15, the first pushed */ \
|
||
for (regnum = 15; regnum >= 0; regnum--, regmask >>= 1) \
|
||
if (regmask & 1) \
|
||
(frame_saved_regs).regs[regnum] = (next_addr -= 4); } \
|
||
else if (0x2f00 == (0xfff0 & read_memory_integer (pc, 2))) \
|
||
{ regnum = 0xf & read_memory_integer (pc, 2); pc += 2; \
|
||
(frame_saved_regs).regs[regnum] = (next_addr -= 4); } \
|
||
/* fmovemx to index of sp may follow. */ \
|
||
regmask = read_memory_integer (pc + 2, 2); \
|
||
nextinsn = 0xffff & read_memory_integer (pc, 2); \
|
||
if (0xf236 == nextinsn \
|
||
&& (regmask & 0xff00) == 0xf000) \
|
||
{ pc += 10; /* Regmask's low bit is for register fp0, the first written */ \
|
||
for (regnum = FP0_REGNUM + 7; regnum >= FP0_REGNUM; regnum--, regmask >>= 1) \
|
||
if (regmask & 1) \
|
||
(frame_saved_regs).regs[regnum] = (next_addr += 12) - 12; \
|
||
regmask = read_memory_integer (pc + 2, 2); } \
|
||
/* clrw -(sp); movw ccr,-(sp) may follow. */ \
|
||
if (0x426742e7 == read_memory_integer (pc, 4)) \
|
||
(frame_saved_regs).regs[PS_REGNUM] = (next_addr -= 4); \
|
||
lose: ; \
|
||
(frame_saved_regs).regs[SP_REGNUM] = (frame_info)->frame + 8; \
|
||
(frame_saved_regs).regs[FP_REGNUM] = (frame_info)->frame; \
|
||
(frame_saved_regs).regs[PC_REGNUM] = (frame_info)->frame + 4; \
|
||
}
|
||
|
||
/* 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; \
|
||
char raw_buffer[12]; \
|
||
sp = push_word (sp, read_register (PC_REGNUM)); \
|
||
sp = push_word (sp, read_register (FP_REGNUM)); \
|
||
write_register (FP_REGNUM, sp); \
|
||
for (regnum = FP0_REGNUM + 7; regnum >= FP0_REGNUM; regnum--) \
|
||
{ read_register_bytes (REGISTER_BYTE (regnum), raw_buffer, 12); \
|
||
sp = push_bytes (sp, raw_buffer, 12); } \
|
||
for (regnum = FP_REGNUM - 1; regnum >= 0; regnum--) \
|
||
sp = push_word (sp, read_register (regnum)); \
|
||
sp = push_word (sp, read_register (PS_REGNUM)); \
|
||
write_register (SP_REGNUM, sp); }
|
||
|
||
/* Discard from the stack the innermost frame,
|
||
restoring all saved 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; \
|
||
char raw_buffer[12]; \
|
||
fi = get_frame_info (frame); \
|
||
fp = fi->frame; \
|
||
get_frame_saved_regs (fi, &fsr); \
|
||
for (regnum = FP0_REGNUM + 7; regnum >= FP0_REGNUM; regnum--) \
|
||
if (fsr.regs[regnum]) \
|
||
{ read_memory (fsr.regs[regnum], raw_buffer, 12); \
|
||
write_register_bytes (REGISTER_BYTE (regnum), raw_buffer, 12); }\
|
||
for (regnum = FP_REGNUM - 1; regnum >= 0; regnum--) \
|
||
if (fsr.regs[regnum]) \
|
||
write_register (regnum, read_memory_integer (fsr.regs[regnum], 4)); \
|
||
if (fsr.regs[PS_REGNUM]) \
|
||
write_register (PS_REGNUM, read_memory_integer (fsr.regs[PS_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
|
||
fmovem 0xff,-(sp)
|
||
moveml 0xfffc,-(sp)
|
||
clrw -(sp)
|
||
movew ccr,-(sp)
|
||
/..* The arguments are pushed at this point by GDB;
|
||
no code is needed in the dummy for this.
|
||
The CALL_DUMMY_START_OFFSET gives the position of
|
||
the following jsr instruction. *../
|
||
jsr @#32323232
|
||
addl #69696969,sp
|
||
trap #15
|
||
nop
|
||
Note this is 28 bytes.
|
||
We actually start executing at the jsr, since the pushing of the
|
||
registers is done by PUSH_DUMMY_FRAME. If this were real code,
|
||
the arguments for the function called by the jsr would be pushed
|
||
between the moveml and the jsr, and we could allow it to execute through.
|
||
But the arguments have to be pushed by GDB after the PUSH_DUMMY_FRAME is done,
|
||
and we cannot allow the moveml to push the registers again lest they be
|
||
taken for the arguments. */
|
||
|
||
#define CALL_DUMMY {0xf227e0ff, 0x48e7fffc, 0x426742e7, 0x4eb93232, 0x3232dffc, 0x69696969, 0x4e4f4e71}
|
||
|
||
#define CALL_DUMMY_LENGTH 28
|
||
|
||
#define CALL_DUMMY_START_OFFSET 12
|
||
|
||
/* 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 *)((char *) dummyname + 20) = nargs * 4; \
|
||
*(int *)((char *) dummyname + 14) = fun; }
|
||
|
||
/* Interface definitions for kernel debugger KDB. */
|
||
|
||
/* Map machine fault codes into signal numbers.
|
||
First subtract 0, divide by 4, then index in a table.
|
||
Faults for which the entry in this table is 0
|
||
are not handled by KDB; the program's own trap handler
|
||
gets to handle then. */
|
||
|
||
#define FAULT_CODE_ORIGIN 0
|
||
#define FAULT_CODE_UNITS 4
|
||
#define FAULT_TABLE \
|
||
{ 0, 0, 0, 0, SIGTRAP, 0, 0, 0, \
|
||
0, SIGTRAP, 0, 0, 0, 0, 0, SIGKILL, \
|
||
0, 0, 0, 0, 0, 0, 0, 0, \
|
||
SIGILL }
|
||
|
||
/* Start running with a stack stretching from BEG to END.
|
||
BEG and END should be symbols meaningful to the assembler.
|
||
This is used only for kdb. */
|
||
|
||
#define INIT_STACK(beg, end) \
|
||
{ asm (".globl end"); \
|
||
asm ("movel #end, sp"); \
|
||
asm ("movel #0,a6"); }
|
||
|
||
/* Push the frame pointer register on the stack. */
|
||
#define PUSH_FRAME_PTR \
|
||
asm ("movel a6,sp@-");
|
||
|
||
/* Copy the top-of-stack to the frame pointer register. */
|
||
#define POP_FRAME_PTR \
|
||
asm ("movl sp@,a6");
|
||
|
||
/* After KDB is entered by a fault, push all registers
|
||
that GDB thinks about (all NUM_REGS of them),
|
||
so that they appear in order of ascending GDB register number.
|
||
The fault code will be on the stack beyond the last register. */
|
||
|
||
#define PUSH_REGISTERS \
|
||
{ asm ("clrw -(sp)"); \
|
||
asm ("pea sp@(10)"); \
|
||
asm ("movem #0xfffe,sp@-"); }
|
||
|
||
/* Assuming the registers (including processor status) have been
|
||
pushed on the stack in order of ascending GDB register number,
|
||
restore them and return to the address in the saved PC register. */
|
||
|
||
#define POP_REGISTERS \
|
||
{ asm ("subil #8,sp@(28)"); \
|
||
asm ("movem sp@,#0xffff"); \
|
||
asm ("rte"); }
|