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Diffstat (limited to 'gdb/m-isi.h')
| -rw-r--r-- | gdb/m-isi.h | 533 |
1 files changed, 0 insertions, 533 deletions
diff --git a/gdb/m-isi.h b/gdb/m-isi.h deleted file mode 100644 index 1e2bb84..0000000 --- a/gdb/m-isi.h +++ /dev/null @@ -1,533 +0,0 @@ -/* -Date: Thu, 2 Apr 87 00:02:42 EST -From: crl@maxwell.physics.purdue.edu (Charles R. LaBrec) -Message-Id: <8704020502.AA01744@maxwell.physics.purdue.edu> -To: bug-gdb@prep.ai.mit.edu -Subject: gdb for ISI Optimum V - -Here is an m-isi-ov.h file for gdb version 2.1. It supports the 68881 -registers, and tracks down the function prologue (since the ISI cc -puts it at the end of the function and branches to it if not -optimizing). Also included are diffs to core.c, findvar.c, and -inflow.c, since the original code assumed that registers are an int in -the user struct, which isn't the case for 68020's with 68881's (and -not using the NEW_SUN_PTRACE). I have not fixed the bugs associated -with the other direction (writing registers back to the user struct). -I have also included a diff that turns m68k-pinsn.c into isi-pinsn.c, -which is needed since the 3.05 release of as does not understand -floating point ops, and it compiles incorrectly under "cc -20" - -I have used gdb for a while now, and it seems to work relatively well, -but I do not guarantee that it is perfect. The more that use it, the -faster the bugs will get shaken out. One bug I know of is not in gdb, -but in the assembler. It seems to screw up the .stabs of variables. -For externs, this is not important since gdb uses the global symbol -value, but for statics, this makes gdb unable to find them. I am -currently trying to track it down. - -As an aside, I notice that only global functions are used as symbols -to print as relative addresses, i.e. "<function + offset>", and not -static functions, which end up printing as large offsets from the last -global one. Would there be a problem if static functions were also -recorded as misc functions in read_dbx_symtab? - -Charles LaBrec -crl @ maxwell.physics.purdue.edu - - Definitions to make GDB run on a ISI Optimum V (3.05) under 4.2bsd. - - Copyright (C) 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! -*/ - - -/* Identify this machine */ -#ifndef ISI68K -#define ISI68K -#endif - -/* 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 */ \ - else if (op == 0060000) \ - pc += 4; /* Skip bra #word */ \ - else if (op == 00600377) \ - pc += 6; /* skip bra #long */ \ - else if ((op & 0177400) == 0060000) \ - pc += 2; /* skip bra #char */ \ -} - - -/* 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 0x10800000 - -/* Address of end of stack space. */ - -#define STACK_END_ADDR 0x10000000 - -/* Stack grows downward. */ - -#define INNER_THAN < - -/* Sequence of bytes for breakpoint instruction. */ - -#define BREAKPOINT {0x4e, 0x4f} - -/* Data segment starts at etext rounded up to DATAROUND in {N,Z}MAGIC files */ - -#define DATAROUND 0x20000 -#define N_DATADDR(hdr) (hdr.a_magic != OMAGIC ? \ - (hdr.a_text + DATAROUND) & ~(DATAROUND-1) : hdr.a_text) - -/* Text segment starts at sizeof (struct exec) in {N,Z}MAGIC files */ - -#define N_TXTADDR(hdr) (hdr.a_magic != OMAGIC ? sizeof (struct exec) : 0) - -/* Amount PC must be decremented by after a breakpoint. - This is often the number of bytes in BREAKPOINT - but not always. - On the ISI, the kernel resets the pc to the trap instr */ - -#define DECR_PC_AFTER_BREAK 0 - -/* Nonzero if instruction at PC is a return instruction. */ - -#define ABOUT_TO_RETURN(pc) (read_memory_integer (pc, 2) == 0x4e75) - -/* Return 1 if P points to an invalid floating point value. */ - -#define INVALID_FLOAT(p, len) 0 /* Just a first guess; not checked */ - -/* Say how long registers are. */ - -#define REGISTER_TYPE long - -/* Number of machine registers */ - -#define NUM_REGS 29 - -/* 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" } - -/* 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 */ - -#ifdef BSD43_ISI40D -#define BLOCKFUDGE 0x400000 -#else -#define BLOCKFUDGE 0 -#endif -#define REGISTER_U_ADDR(addr, blockend, regno) \ -{ blockend -= BLOCKFUDGE; \ - if (regno < 2) addr = blockend - 0x18 + regno * 4; \ - else if (regno < 8) addr = blockend - 0x54 + regno * 4; \ - else if (regno < 10) addr = blockend - 0x30 + regno * 4;\ - else if (regno < 15) addr = blockend - 0x5c + regno * 4;\ - else if (regno < 16) addr = blockend - 0x1c; \ - else if (regno < 18) addr = blockend - 0x44 + regno * 4;\ - else if (regno < 26) addr = (int) ((struct user *)0)->u_68881_regs \ - + (regno - 18) * 12; \ - else if (regno < 29) addr = (int) ((struct user *)0)->u_68881_regs \ - + 8 * 12 + (regno - 26) * 4; \ -} - -/* 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. */ - -#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) - -/* 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 ISI, the frame's nominal address - is the address of a 4-byte word containing the calling frame's address. */ - -#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)) - -#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(val, fi) \ -{ register CORE_ADDR pc = FRAME_SAVED_PC (fi.frame); \ - 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; } - -/* 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; \ - register int insn; \ - register int offset; \ - 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, \ - or a branch followed by a link a6 instruction; \ - if not we lose. If we win, find the address above the saved \ - regs using the amount of storage from the link instruction. */\ -retry: \ - insn = read_memory_integer (pc, 2); \ - if (insn == 044016) \ - next_addr = (frame_info).frame - read_memory_integer (pc += 2, 4), pc+=4; \ - else if (insn == 047126) \ - next_addr = (frame_info).frame - read_memory_integer (pc += 2, 2), pc+=2; \ - else if ((insn & 0177400) == 060000) /* bra insn */ \ - { offset = insn & 0377; \ - pc += 2; /* advance past bra */ \ - if (offset == 0) /* bra #word */ \ - offset = read_memory_integer (pc, 2), pc += 2; \ - else if (offset == 0377) /* bra #long */ \ - offset = read_memory_integer (pc, 4), pc += 4; \ - pc += offset; \ - goto retry; \ - } 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) */ \ - insn = read_memory_integer (pc, 2), pc += 2; \ - regmask = read_memory_integer (pc, 2); \ - if ((insn & 0177760) == 022700) /* movl rn, (sp) */ \ - (frame_saved_regs).regs[(insn&7) + ((insn&010)?8:0)] = next_addr; \ - else if ((insn & 0177760) == 024700) /* movl rn, -(sp) */ \ - (frame_saved_regs).regs[(insn&7) + ((insn&010)?8:0)] = next_addr-=4; \ - else if (insn == 0044327) /* moveml mask, (sp) */ \ - { pc += 2; \ - /* Regmask's low bit is for register 0, the first written */ \ - next_addr -= 4; \ - for (regnum = 0; regnum < 16; regnum++, regmask >>= 1) \ - if (regmask & 1) \ - (frame_saved_regs).regs[regnum] = (next_addr += 4); \ - } else if (insn == 0044347) /* moveml mask, -(sp) */ \ - { pc += 2; \ - /* 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); } \ - /* clrw -(sp); movw ccr,-(sp) may follow. */ \ - if (read_memory_integer (pc, 2) == 041147 \ - && read_memory_integer (pc+2, 2) == 042347) \ - (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; \ -} - -/* Compensate for lack of `vprintf' function. */ -#define vprintf(format, ap) _doprnt (format, ap, stdout) - -/* 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 registers. */ - -#define POP_FRAME \ -{ register CORE_ADDR fp = read_register (FP_REGNUM); \ - register int regnum; \ - struct frame_saved_regs fsr; \ - struct frame_info fi; \ - char raw_buffer[12]; \ - fi = get_frame_info (fp); \ - 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); \ -} - -/* This sequence of words is the instructions - fmovem #<f0-f7>,-(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 - bpt - nop -Note this is 24 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, fun, nargs) \ -{ *(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 ("movl $ end, sp"); \ - asm ("clrl fp"); } - -/* Push the frame pointer register on the stack. */ -#define PUSH_FRAME_PTR \ - asm ("movel fp, -(sp)"); - -/* 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 ("clrw -(sp)"); \ - asm ("pea 10(sp)"); \ - 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 $8,28(sp)"); \ - asm ("movem (sp),$ 0xffff"); \ - asm ("rte"); } |