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authorStan Shebs <shebs@codesourcery.com>1999-04-16 01:34:07 +0000
committerStan Shebs <shebs@codesourcery.com>1999-04-16 01:34:07 +0000
commit071ea11e85eb9d529cc5eb3d35f6247466a21b99 (patch)
tree5deda65b8d7b04d1f4cbc534c3206d328e1267ec /gdb/config/ns32k/tm-umax.h
parent1730ec6b1848f0f32154277f788fb29f88d8475b (diff)
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Initial creation of sourceware repository
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-rw-r--r--gdb/config/ns32k/tm-umax.h370
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diff --git a/gdb/config/ns32k/tm-umax.h b/gdb/config/ns32k/tm-umax.h
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--- a/gdb/config/ns32k/tm-umax.h
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-/* Definitions to make GDB run on an encore under umax 4.2
- Copyright 1987, 1989, 1991, 1993 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
-
-/* This is also included by tm-ns32km3.h, as well as being used by umax. */
-
-#define TARGET_BYTE_ORDER LITTLE_ENDIAN
-
-/* Need to get function ends by adding this to epilogue address from .bf
- record, not using x_fsize field. */
-#define FUNCTION_EPILOGUE_SIZE 4
-
-/* 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. */
-
-#ifndef STACK_END_ADDR
-#define STACK_END_ADDR (0xfffff000)
-#endif
-
-/* Stack grows downward. */
-
-#define INNER_THAN(lhs,rhs) ((lhs) < (rhs))
-
-/* 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
-
-#if 0 /* Disable until fixed *correctly*. */
-#ifndef INVALID_FLOAT
-#ifndef NaN
-#include <nan.h>
-#endif NaN
-
-/* Return 1 if P points to an invalid floating point value. */
-/* Surely wrong for cross-debugging. */
-#define INVALID_FLOAT(p, s) \
- ((s == sizeof (float))? \
- NaF (*(float *) p) : \
- NaD (*(double *) p))
-#endif /* INVALID_FLOAT */
-#endif
-
-/* Say how long (ordinary) registers are. This is a piece of bogosity
- used in push_word and a few other places; REGISTER_RAW_SIZE is the
- real way to know how big a register is. */
-
-#define REGISTER_SIZE 4
-
-/* 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 R0_REGNUM 0 /* General register 0 */
-#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) */
-
-/* Total amount of space needed to store our copies of the machine's
- register state, the array `registers'. */
-#define REGISTER_BYTES \
- ((NUM_REGS - 4) * REGISTER_RAW_SIZE(R0_REGNUM) \
- + 4 * REGISTER_RAW_SIZE(LP0_REGNUM))
-
-/* 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
-
-/* 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) \
- memcpy (VALBUF, REGBUF+REGISTER_BYTE (TYPE_CODE (TYPE) == TYPE_CODE_FLT ? FP0_REGNUM : 0), 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. */
-
-/* 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) \
- (!inside_entry_file ((thisframe)->pc) ? \
- read_memory_integer ((thisframe)->frame, 4) :\
- 0)
-
-/* 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. */
-
-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; \
- \
- memset (&(frame_saved_regs), '\0', 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; \
- } \
-}
-
-/* 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 struct frame_info *frame = get_current_frame (); \
- register CORE_ADDR fp; \
- register int regnum; \
- struct frame_saved_regs fsr; \
- struct frame_info *fi; \
- fp = frame->frame; \
- get_frame_saved_regs (frame, &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 (); \
-}
-
-/* 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, args, type, gcc_p) \
-{ \
- 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; \
-}