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Diffstat (limited to 'gdb/m-vax.h')
| -rw-r--r-- | gdb/m-vax.h | 471 |
1 files changed, 0 insertions, 471 deletions
diff --git a/gdb/m-vax.h b/gdb/m-vax.h deleted file mode 100644 index 9f0c414..0000000 --- a/gdb/m-vax.h +++ /dev/null @@ -1,471 +0,0 @@ -/* Definitions to make GDB run on a vax under 4.2bsd. - Copyright (C) 1986, 1987, 1989 Free Software Foundation, Inc. - -This file is part of GDB. - -GDB 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 1, or (at your option) -any later version. - -GDB 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 GDB; see the file COPYING. If not, write to -the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ - -/* There is one known bug with VAX support that I don't know how to - fix: if you do a backtrace from a signal handler, you get something - like: -#0 0xbc in kill (592, 3) -#1 0x7f in hand (...) (...) -#2 0x7fffec7e in ?? (2, 0, 2147478112, 94) - ^^ GDB doesn't know about sigtramp -#3 0x7fffec70 in ?? (592, 2) - ^^^^^^^^^^ wrong address -#4 0xae in main (...) (...) - -when the correct backtrace (as given by adb) is: -_kill(250,3) from _hand+21 -_hand(2,0,7fffea60,5e) from 7fffec7e -sigtramp(2,0,7fffea60,5e) from _kill+4 -_kill(250,2) from _main+2e -_main(1,7fffeac4,7fffeacc) from start+3d - -If anyone knows enough about VAX BSD to fix this, please send the -fix to bug-gdb@prep.ai.mit.edu. */ - -#ifndef vax -#define vax -#endif - -/* Define the bit, byte, and word ordering of the machine. */ -/* #define BITS_BIG_ENDIAN */ -/* #define BYTES_BIG_ENDIAN */ -/* #define WORDS_BIG_ENDIAN */ - -/* Get rid of any system-imposed stack limit if possible. */ - -#define SET_STACK_LIMIT_HUGE - -/* 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 2 - -/* Advance PC across any function entry prologue instructions - to reach some "real" code. */ - -#define SKIP_PROLOGUE(pc) \ -{ register int op = (unsigned char) read_memory_integer (pc, 1); \ - if (op == 0x11) pc += 2; /* skip brb */ \ - if (op == 0x31) pc += 3; /* skip brw */ \ - if (op == 0xC2 && \ - ((unsigned char) read_memory_integer (pc+2, 1)) == 0x5E) \ - pc += 3; /* skip subl2 */ \ - if (op == 0x9E && \ - ((unsigned char) read_memory_integer (pc+1, 1)) == 0xAE && \ - ((unsigned char) read_memory_integer(pc+3, 1)) == 0x5E) \ - pc += 4; /* skip movab */ \ - if (op == 0x9E && \ - ((unsigned char) read_memory_integer (pc+1, 1)) == 0xCE && \ - ((unsigned char) read_memory_integer(pc+4, 1)) == 0x5E) \ - pc += 5; /* skip movab */ \ - if (op == 0x9E && \ - ((unsigned char) read_memory_integer (pc+1, 1)) == 0xEE && \ - ((unsigned char) read_memory_integer(pc+6, 1)) == 0x5E) \ - pc += 7; /* skip movab */ \ -} - -/* 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) FRAME_SAVED_PC(frame) - -/* 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 (0x80000000 - (UPAGES * NBPG)) - -/* Same as offsetof macro from stddef.h (which 4.3BSD doesn't have). */ -#define my_offsetof(TYPE, MEMBER) ((unsigned long) &((TYPE *)0)->MEMBER) - -/* On the VAX, sigtramp is in the u area. Note that this definition - includes both the subroutine at u_pcb.pcb_sigc[3], and the - routine at u_pcb.pcb_sigc[0] (which does a calls to u_pcb.pcb_sigc[3]). - I think this is what we want. */ -#define IN_SIGTRAMP(pc, name) \ - ((pc) >= KERNEL_U_ADDR + my_offsetof (struct user, u_pcb.pcb_sigc[0]) \ - && (pc) < KERNEL_U_ADDR + my_offsetof (struct user, u_pcb.pcb_sigc[5]) \ - ) - -/* Address of end of stack space. */ - -#define STACK_END_ADDR (0x80000000 - (UPAGES * NBPG)) - -/* Stack grows downward. */ - -#define INNER_THAN < - -/* Sequence of bytes for breakpoint instruction. */ - -#define BREAKPOINT {3} - -/* 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) == 04) - -/* Return 1 if P points to an invalid floating point value. - LEN is the length in bytes -- not relevant on the Vax. */ - -#define INVALID_FLOAT(p, len) ((*(short *) p & 0xff80) == 0x8000) - -/* Largest integer type */ -#define LONGEST long - -/* Name of the builtin type for the LONGEST type above. */ -#define BUILTIN_TYPE_LONGEST builtin_type_long - -/* Say how long (ordinary) registers are. */ - -#define REGISTER_TYPE long - -/* Number of machine registers */ - -#define NUM_REGS 17 - -/* 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", "r8", "r9", "r10", "r11", "ap", "fp", "sp", "pc", "ps"} - -/* 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 12 -#define FP_REGNUM 13 /* Contains address of executing stack frame */ -#define SP_REGNUM 14 /* Contains address of top of stack */ -#define PC_REGNUM 15 /* Contains program counter */ -#define PS_REGNUM 16 /* Contains processor status */ - -#define REGISTER_U_ADDR(addr, blockend, regno) \ -{ addr = blockend - 0110 + regno * 4; \ - if (regno == PC_REGNUM) addr = blockend - 8; \ - if (regno == PS_REGNUM) addr = blockend - 4; \ - if (regno == FP_REGNUM) addr = blockend - 0120; \ - if (regno == AP_REGNUM) addr = blockend - 0124; \ - if (regno == SP_REGNUM) addr = blockend - 20; } - -/* Total amount of space needed to store our copies of the machine's - register state, the array `registers'. */ -#define REGISTER_BYTES (17*4) - -/* Index within `registers' of the first byte of the space for - register N. */ - -#define REGISTER_BYTE(N) ((N) * 4) - -/* Number of bytes of storage in the actual machine representation - for register N. On the vax, all regs are 4 bytes. */ - -#define REGISTER_RAW_SIZE(N) 4 - -/* Number of bytes of storage in the program's representation - for register N. On the vax, all regs are 4 bytes. */ - -#define REGISTER_VIRTUAL_SIZE(N) 4 - -/* Largest value REGISTER_RAW_SIZE can have. */ - -#define MAX_REGISTER_RAW_SIZE 4 - -/* Largest value REGISTER_VIRTUAL_SIZE can have. */ - -#define MAX_REGISTER_VIRTUAL_SIZE 4 - -/* 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), 4); - -/* 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), 4); - -/* Return the GDB type object for the "standard" data type - of data in register N. */ - -#define REGISTER_VIRTUAL_TYPE(N) 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. */ - -#define STORE_STRUCT_RETURN(ADDR, SP) \ - { write_register (1, (ADDR)); } - -/* 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)) - -/* Compensate for lack of `vprintf' function. */ -#ifndef HAVE_VPRINTF -#define vprintf(format, ap) _doprnt (format, ap, stdout) -#endif /* not HAVE_VPRINTF */ - -/* 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 Vax, the frame's nominal address is the FP value, - and 12 bytes later comes the saved previous FP value as a 4-byte word. */ - -#define FRAME_CHAIN(thisframe) \ - (outside_startup_file ((thisframe)->pc) ? \ - read_memory_integer ((thisframe)->frame + 12, 4) :\ - 0) - -#define FRAME_CHAIN_VALID(chain, thisframe) \ - (chain != 0 && (outside_startup_file (FRAME_SAVED_PC (thisframe)))) - -#define FRAME_CHAIN_COMBINE(chain, thisframe) (chain) - -/* Define other aspects of the stack frame. */ - -/* A macro that tells us whether the function invocation represented - by FI does not have a frame on the stack associated with it. If it - does not, FRAMELESS is set to 1, else 0. */ -/* On the vax, all functions have frames. */ -#define FRAMELESS_FUNCTION_INVOCATION(FI, FRAMELESS) {(FRAMELESS) = 0;} - -/* Saved Pc. */ - -#define FRAME_SAVED_PC(FRAME) (read_memory_integer ((FRAME)->frame + 16, 4)) - -/* Cannot find the AP register value directly from the FP value. Must - find it saved in the frame called by this one, or in the AP - register for the innermost frame. However, there is no way to tell - the difference between the innermost frame and a frame for which we - just don't know the frame that it called (e.g. "info frame - 0x7ffec789"). For the sake of argument suppose that the stack is - somewhat trashed (which is one reason that "info frame" exists). - So return Frame_unknown (indicating we don't know the address of - the arglist) if we don't know what frame this frame calls. */ -#define FRAME_ARGS_ADDRESS_CORRECT(fi) \ - (((fi)->next_frame \ - ? read_memory_integer ((fi)->next_frame + 8, 4) \ - : /* read_register (AP_REGNUM) */ Frame_unknown)) - -/* In most of GDB, getting the args address is too important to - just say "I don't know". This is sometimes wrong, but c'est - la vie. */ -#define FRAME_ARGS_ADDRESS(fi) \ - (((fi)->next_frame \ - ? read_memory_integer ((fi)->next_frame + 8, 4) \ - : read_register (AP_REGNUM) /* Frame_unknown */)) - -#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) \ -{ numargs = (0xff & read_memory_integer (FRAME_ARGS_ADDRESS (fi), 1)); } - -/* Return number of bytes at start of arglist that are not really args. */ - -#define FRAME_ARGS_SKIP 4 - -/* 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 = read_memory_integer ((frame_info)->frame+4, 4) >> 16; \ - register CORE_ADDR next_addr; \ - bzero (&frame_saved_regs, sizeof frame_saved_regs); \ - next_addr = (frame_info)->frame + 16; \ - /* Regmask's low bit is for register 0, \ - which is the first one that would be pushed. */ \ - for (regnum = 0; regnum < 12; regnum++, regmask >>= 1) \ - (frame_saved_regs).regs[regnum] = (regmask & 1) ? (next_addr += 4) : 0; \ - (frame_saved_regs).regs[SP_REGNUM] = next_addr + 4; \ - if (read_memory_integer ((frame_info)->frame + 4, 4) & 0x20000000) \ - (frame_saved_regs).regs[SP_REGNUM] += 4 + 4 * read_memory_integer (next_addr + 4, 4); \ - (frame_saved_regs).regs[PC_REGNUM] = (frame_info)->frame + 16; \ - (frame_saved_regs).regs[FP_REGNUM] = (frame_info)->frame + 12; \ - (frame_saved_regs).regs[AP_REGNUM] = (frame_info)->frame + 8; \ - (frame_saved_regs).regs[PS_REGNUM] = (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, 0); /* arglist */ \ - for (regnum = 11; regnum >= 0; regnum--) \ - sp = push_word (sp, read_register (regnum)); \ - sp = push_word (sp, read_register (PC_REGNUM)); \ - sp = push_word (sp, read_register (FP_REGNUM)); \ - sp = push_word (sp, read_register (AP_REGNUM)); \ - sp = push_word (sp, (read_register (PS_REGNUM) & 0xffef) \ - + 0x2fff0000); \ - sp = push_word (sp, 0); \ - write_register (SP_REGNUM, sp); \ - write_register (FP_REGNUM, sp); \ - write_register (AP_REGNUM, sp + 17 * sizeof (int)); } - -/* Discard from the stack the innermost frame, restoring all registers. */ - -#define POP_FRAME \ -{ register CORE_ADDR fp = read_register (FP_REGNUM); \ - register int regnum; \ - register int regmask = read_memory_integer (fp + 4, 4); \ - write_register (PS_REGNUM, \ - (regmask & 0xffff) \ - | (read_register (PS_REGNUM) & 0xffff0000)); \ - write_register (PC_REGNUM, read_memory_integer (fp + 16, 4)); \ - write_register (FP_REGNUM, read_memory_integer (fp + 12, 4)); \ - write_register (AP_REGNUM, read_memory_integer (fp + 8, 4)); \ - fp += 16; \ - for (regnum = 0; regnum < 12; regnum++) \ - if (regmask & (0x10000 << regnum)) \ - write_register (regnum, read_memory_integer (fp += 4, 4)); \ - fp = fp + 4 + ((regmask >> 30) & 3); \ - if (regmask & 0x20000000) \ - { regnum = read_memory_integer (fp, 4); \ - fp += (regnum + 1) * 4; } \ - write_register (SP_REGNUM, fp); \ - flush_cached_frames (); \ - set_current_frame (create_new_frame (read_register (FP_REGNUM),\ - read_pc ())); } - -/* This sequence of words is the instructions - calls #69, @#32323232 - bpt - Note this is 8 bytes. */ - -#define CALL_DUMMY {0x329f69fb, 0x03323232} - -#define CALL_DUMMY_START_OFFSET 0 /* Start execution at beginning of dummy */ - -/* 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, type) \ -{ *((char *) dummyname + 1) = nargs; \ - *(int *)((char *) dummyname + 3) = 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, 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"); } |