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- /*-
- * This code is derived from software copyrighted by the Free Software
- * Foundation.
- *
- * Modified 1991 by Donn Seeley at UUNET Technologies, Inc.
- *
- * @(#)m-tahoe.h 6.4 (Berkeley) 5/8/91
- */
-
- /*
- * Ported by the State University of New York at Buffalo by the Distributed
- * Computer Systems Lab, Department of Computer Science, 1991.
- */
-
- /*
- * These first two are kludges to get this thing to compile under Reno (or
- * at least the Reno running on okeeffe). It seems there are a few problems
- * with the include files.
- */
-
- /*
- * Until gdb becomes POSIX-compatible...
- */
- #define USE_OLD_TTY 1
-
- /*
- * That's all for the kludges. Now on to the port...
- */
-
- #ifndef tahoe
- #define tahoe
- #endif
-
- /* Define the bit, byte, and word ordering of the machine. */
-
- /* #define BITS_BIG_ENDIAN */
- #define BYTES_BIG_ENDIAN
- #define WORDS_BIG_ENDIAN
-
- /* Library stuff: POSIX tty (not supported yet), V7 tty (sigh), vprintf. */
-
- #define HAVE_TERMIOS 1
- #define USE_OLD_TTY 1
- #define HAVE_VPRINTF 1
-
- /* 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 == 0x13) pc += 3; /* skip brw */ \
- if (op == 0x2c && \
- ((unsigned char) read_memory_integer (pc+2, 1)) == 0x5e) \
- pc += 3; /* skip subl2 */ \
- if (op == 0xe9 && \
- ((unsigned char) read_memory_integer (pc+1, 1)) == 0xae && \
- ((unsigned char) read_memory_integer(pc+3, 1)) == 0x5e) \
- pc += 4; /* skip movab */ \
- if (op == 0xe9 && \
- ((unsigned char) read_memory_integer (pc+1, 1)) == 0xce && \
- ((unsigned char) read_memory_integer(pc+4, 1)) == 0x5e) \
- pc += 5; /* skip movab */ \
- if (op == 0xe9 && \
- ((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 (0xc0000000 - (UPAGES * NBPG))
-
- /* Address of end of stack space. */
-
- #define STACK_END_ADDR (0xc0000000 - (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)
-
- /* Under BSD, 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]) \
- )
-
- /* Stack grows downward. */
-
- #define INNER_THAN <
-
- /* Sequence of bytes for breakpoint instruction. */
-
- #define BREAKPOINT {0x30}
-
- /* 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) == 0x40)
-
- /* Return 1 if P points to an invalid floating point value.
- LEN is the length in bytes -- not relevant on the Tahoe. */
-
- #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 19
-
- /* 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", "r12", "fp", "sp", "pc", "ps", "al", "ah"}
-
- #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 AL_REGNUM 17 /* Contains accumulator */
- #define AH_REGNUM 18
-
- #define REGISTER_U_ADDR(addr, blockend, regno) \
- { addr = blockend - 100 + regno * 4; \
- if (regno == PC_REGNUM) addr = blockend - 8; \
- if (regno == PS_REGNUM) addr = blockend - 4; \
- if (regno == FP_REGNUM) addr = blockend - 40; \
- if (regno == SP_REGNUM) addr = blockend - 36; \
- if (regno == AL_REGNUM) addr = blockend - 20; \
- if (regno == AH_REGNUM) addr = blockend - 24;}
-
- /* Total amount of space needed to store our copies of the machine's
- register state, the array `registers'. */
-
- #define REGISTER_BYTES (19*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 tahoe, 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 tahoe, 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 Tahoe, the frame's nominal address is the FP value,
- and it points to the old FP */
-
- #define FRAME_CHAIN(thisframe) \
- (outside_startup_file ((thisframe)->pc) ? \
- read_memory_integer ((thisframe)->frame, 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. */
-
- /* Saved PC */
-
- #define FRAME_SAVED_PC(FRAME) (read_memory_integer ((FRAME)->frame - 8, 4))
-
- /* In most of GDB, getting the args address is too important to
- just say "I don't know". */
-
- #define FRAME_ARGS_ADDRESS(fi) ((fi)->frame)
-
- /* Address to use as an anchor for finding local variables */
-
- #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 = ((0xffff & read_memory_integer(((fi)->frame-4),4)) - 4) >> 2; }
-
- /* 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 rmask = 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 - 8; \
- for (regnum = 12; regnum >= 0; regnum--, rmask <<= 1) \
- (frame_saved_regs).regs[regnum] = (rmask & 0x1000) ? (next_addr -= 4) : 0;\
- (frame_saved_regs).regs[SP_REGNUM] = (frame_info)->frame + 4; \
- (frame_saved_regs).regs[PC_REGNUM] = (frame_info)->frame - 8; \
- (frame_saved_regs).regs[FP_REGNUM] = (frame_info)->frame; \
- }
-
- /* 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; \
- printf("PUSH_DUMMY_FRAME\n"); \
- sp = push_word (sp, read_register (FP_REGNUM)); \
- write_register (FP_REGNUM, sp); \
- sp = push_word (sp, 0x1fff0004); /*SAVE MASK*/ \
- sp = push_word (sp, read_register (PC_REGNUM)); \
- for (regnum = 12; regnum >= 0; 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; \
- register int regmask = read_memory_integer (fp-4, 4); \
- printf("POP_FRAME\n"); \
- regmask >>= 16; \
- write_register (SP_REGNUM, fp+4); \
- write_register (PC_REGNUM, read_memory_integer(fp-8, 4)); \
- write_register (FP_REGNUM, read_memory_integer(fp, 4)); \
- fp -= 8; \
- for (regnum = 12; regnum >= 0; regnum--, regmask <<= 1) \
- if (regmask & 0x1000) \
- write_register (regnum, read_memory_integer (fp-=4, 4)); \
- 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 {0xbf699f32, 0x32323230}
-
- /* Start execution at beginning of dummy */
-
- #define CALL_DUMMY_START_OFFSET 0
-
- /* 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) \
- { int temp = (int) fun; \
- *((char *) dummyname + 1) = nargs; \
- bcopy(&temp,(char *)dummyname+3,4); }
-
- /* 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 0x41(sp)"); \
- asm ("pushl r0" ); \
- asm ("pushl r1" ); \
- asm ("pushl r2" ); \
- asm ("pushl r3" ); \
- asm ("pushl r4" ); \
- asm ("pushl r5" ); \
- asm ("pushl r6" ); \
- asm ("pushl r7" ); \
- asm ("pushl r8" ); \
- asm ("pushl r9" ); \
- asm ("pushl r10" ); \
- asm ("pushl r11" ); \
- asm ("pushl r12" ); \
- asm ("pushl fp" ); \
- asm ("pushl sp" ); \
- asm ("pushl pc" ); \
- asm ("pushl ps" ); \
- asm ("pushl aclo" ); \
- asm ("pushl achi" ); \
- }
-
- /* 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 ("movl (sp)+, achi"); \
- asm ("movl (sp)+, aclo"); \
- asm ("movl (sp)+, ps"); \
- asm ("movl (sp)+, pc"); \
- asm ("movl (sp)+, sp"); \
- asm ("movl (sp)+, fp"); \
- asm ("movl (sp)+, r12"); \
- asm ("movl (sp)+, r11"); \
- asm ("movl (sp)+, r10"); \
- asm ("movl (sp)+, r9"); \
- asm ("movl (sp)+, r8"); \
- asm ("movl (sp)+, r7"); \
- asm ("movl (sp)+, r6"); \
- asm ("movl (sp)+, r5"); \
- asm ("movl (sp)+, r4"); \
- asm ("movl (sp)+, r3"); \
- asm ("movl (sp)+, r2"); \
- asm ("movl (sp)+, r1"); \
- asm ("movl (sp)+, r0"); \
- asm ("subl2 $8,(sp)"); \
- asm ("movl (sp),sp"); \
- asm ("rei"); }
-