| /* Definitions to target GDB to a merlin under utek 2.1 |
| Copyright 1986, 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. */ |
| |
| #define TARGET_BYTE_ORDER LITTLE_ENDIAN |
| |
| /* 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. */ |
| |
| extern CORE_ADDR merlin_skip_prologue (CORE_ADDR); |
| #define SKIP_PROLOGUE(pc) (merlin_skip_prologue (pc)) |
| |
| /* 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 (0x800000) |
| |
| /* 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 |
| |
| /* Define this to say that the "svc" insn is followed by |
| codes in memory saying which kind of system call it is. */ |
| |
| #define NS32K_SVC_IMMED_OPERANDS |
| |
| /* 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", \ |
| "pc", "sp", "fp", "ps", \ |
| "fsr", \ |
| "f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7", \ |
| "l0", "l1", "l2", "l3", "l4", \ |
| } |
| |
| /* 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 AP_REGNUM FP_REGNUM |
| #define FP_REGNUM 10 /* Contains address of executing stack frame */ |
| #define SP_REGNUM 9 /* Contains address of top of stack */ |
| #define PC_REGNUM 8 /* Contains program counter */ |
| #define PS_REGNUM 11 /* Contains processor status */ |
| #define FPS_REGNUM 12 /* Floating point status register */ |
| #define FP0_REGNUM 13 /* Floating point register 0 */ |
| #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) * 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 |
| |
| /* Return the GDB type object for the "standard" data type |
| of data in register N. */ |
| |
| #define REGISTER_VIRTUAL_TYPE(N) \ |
| ((N) >= FP0_REGNUM ? \ |
| ((N) >= LP0_REGNUM ? \ |
| builtin_type_double \ |
| : builtin_type_float) \ |
| : 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. |
| |
| On this machine this is a no-op, as gcc doesn't run on it yet. |
| 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, 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)) |
| |
| /* 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 Merlin, 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) ((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. */ |
| |
| extern int merlin_frame_num_args (struct frame_info *fi); |
| #define FRAME_NUM_ARGS(fi) (merlin_frame_num_args ((fi))) |
| |
| /* 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) \ |
| { int regmask,regnum; \ |
| int localcount; \ |
| CORE_ADDR enter_addr; \ |
| CORE_ADDR next_addr; \ |
| \ |
| enter_addr = get_pc_function_start ((frame_info)->pc); \ |
| regmask = read_memory_integer (enter_addr+1, 1); \ |
| 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); } |
| |
| |
| /* 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 = 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; \ |
| } |