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Diffstat (limited to 'gdb/m-merlin.h')
| -rw-r--r-- | gdb/m-merlin.h | 437 |
1 files changed, 437 insertions, 0 deletions
diff --git a/gdb/m-merlin.h b/gdb/m-merlin.h new file mode 100644 index 0000000..7f87979 --- /dev/null +++ b/gdb/m-merlin.h @@ -0,0 +1,437 @@ +/* Definitions to make GDB run on a merlin under utek 2.1 + Copyright (C) 1986, 1987 Free Software Foundation, Inc. + +GDB is distributed in the hope that it will be useful, but WITHOUT ANY +WARRANTY. No author or distributor accepts responsibility to anyone +for the consequences of using it or for whether it serves any +particular purpose or works at all, unless he says so in writing. +Refer to the GDB General Public License for full details. + +Everyone is granted permission to copy, modify and redistribute GDB, +but only under the conditions described in the GDB General Public +License. A copy of this license is supposed to have been given to you +along with GDB so you can know your rights and responsibilities. It +should be in a file named COPYING. Among other things, the copyright +notice and this notice must be preserved on all copies. + +In other words, go ahead and share GDB, but don't try to stop +anyone else from sharing it farther. Help stamp out software hoarding! +*/ + +#ifndef ns16000 +#define ns16000 +#endif + +# include <machine/reg.h> + +/* 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, 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) + +/* This is the amount to subtract from u.u_ar0 + to get the offset in the core file of the register values. */ + +#define KERNEL_U_ADDR (0xfef000) + +/* Address of end of stack space. */ + +#define STACK_END_ADDR (0x800000) + +/* 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) + +/* Return 1 if P points to an invalid floating point value. */ + +#define INVALID_FLOAT(p, len) 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. */ + +#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", \ + "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) */ + +#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 = blockend + (R0 - regno) * sizeof (int); break; \ + case PC_REGNUM: \ + addr = blockend + PC * sizeof (int); break; \ + case SP_REGNUM: \ + addr = blockend + SP * sizeof (int); break; \ + case FP_REGNUM: \ + addr = blockend + FP * sizeof (int); break; \ + case PS_REGNUM: \ + addr = blockend + 12 * sizeof (int); break; \ + case FPS_REGNUM: \ + addr = 108; 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 = 76 + (regno - FP0_REGNUM) * sizeof (float); break; \ + case LP0_REGNUM + 0: case LP0_REGNUM + 1: \ + case LP0_REGNUM + 2: case LP0_REGNUM + 3: \ + addr = 76 + (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 ? \ + ((N) >= LP0_REGNUM ? \ + builtin_type_double \ + : builtin_type_float) \ + : builtin_type_int) + +/* 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, 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)) + +/* 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 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) (read_memory_integer (thisframe, 4)) + +#define FRAME_CHAIN_VALID(chain, thisframe) \ + (chain != 0 && (FRAME_SAVED_PC (thisframe) >= first_object_file_end)) + +#define FRAME_CHAIN_COMBINE(chain, thisframe) (chain) + +/* Define other aspects of the stack frame. */ + +#define FRAME_SAVED_PC(frame) (read_memory_integer (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.frame); \ + 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 CORE_ADDR fp = read_register (FP_REGNUM); \ + register int regnum; \ + struct frame_saved_regs fsr; \ + struct frame_info fi; \ + fi = get_frame_info (fp); \ + 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); \ +} + +/* 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, fun, nargs) \ +{ 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; \ +} + +#ifdef notdef +/* 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, SIGKILL, SIGSEGV, 0, 0, 0, 0, 0, \ + 0, 0, SIGTRAP, SIGTRAP, 0, 0, 0, 0, \ + 0, 0, 0, 0, 0, 0, 0, 0} + +/* 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 ("movl $ end, sp"); \ + asm ("clrl fp"); } + +/* Push the frame pointer register on the stack. */ +#define PUSH_FRAME_PTR \ + asm ("pushl fp"); + +/* Copy the top-of-stack to the frame pointer register. */ +#define POP_FRAME_PTR \ + asm ("movl (sp), fp"); + +/* 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 ("pushl 8(sp)"); \ + asm ("pushl 8(sp)"); \ + asm ("pushal 0x14(sp)"); \ + asm ("pushr $037777"); } + +/* 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 ("popr $037777"); \ + asm ("subl2 $8,(sp)"); \ + asm ("movl (sp),sp"); \ + asm ("rei"); } +#endif |