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Diffstat (limited to 'gdb/config/ns32k/tm-merlin.h')
| -rw-r--r-- | gdb/config/ns32k/tm-merlin.h | 313 |
1 files changed, 313 insertions, 0 deletions
diff --git a/gdb/config/ns32k/tm-merlin.h b/gdb/config/ns32k/tm-merlin.h new file mode 100644 index 00000000000..f90c5e79778 --- /dev/null +++ b/gdb/config/ns32k/tm-merlin.h @@ -0,0 +1,313 @@ +/* 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. */ + +#define SKIP_PROLOGUE(pc) \ +{ register int 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 (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. */ + +#define FRAME_NUM_ARGS(numargs, fi) \ +{ CORE_ADDR pc; \ + int insn; \ + int addr_mode; \ + int width; \ + \ + pc = 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; } \ + else numargs = -1; \ +} + +/* 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; \ +} |