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- /* Definitions to make GDB run on a MIPS-based machines.
- 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. */
-
- /* Define the bit, byte, and word ordering of the machine. */
- #ifndef DECSTATION
- #define BITS_BIG_ENDIAN
- #define BYTES_BIG_ENDIAN
- #define WORDS_BIG_ENDIAN
- #endif
-
- #define IEEE_FLOAT
-
- #define FLOAT_INFO { printf("FPA coprocessor available.\n"); }
-
- /* 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. */
-
- #undef NAMES_HAVE_UNDERSCORE
-
- /* Debugger information will be a variant of COFF */
-
- /*#define READ_DBX_FORMAT*/
- #define COFF_FORMAT
- #define THIRD_EYE_FORMAT
-
- /* We need to remember some procedure-specific values
- to do stack traversal. Use the mips_proc_info type. */
-
- #define mips_proc_info PDR
- #define PROC_LOW_ADDR(proc) ((proc)->lnLow) /* least address */
- #define PROC_HIGH_ADDR(proc) ((proc)->lnHigh) /* upper address bound */
- #define PROC_FRAME_OFFSET(proc) ((proc)->frameoffset)
- #define PROC_FRAME_REG(proc) ((proc)->framereg)
- #define PROC_REG_MASK(proc) ((proc)->regmask)
- #define PROC_FREG_MASK(proc) ((proc)->fregmask)
- #define PROC_REG_OFFSET(proc) ((proc)->regoffset)
- #define PROC_FREG_OFFSET(proc) ((proc)->fregoffset)
- #define PROC_PC_REG(proc) ((proc)->pcreg)
- #define PROC_SYMBOL(proc) (*(struct symbol**)&(proc)->isym)
- #define _PROC_MAGIC_ 0x0F0F0F0F
- #define PROC_DESC_IS_DUMMY(proc) ((proc)->isym == _PROC_MAGIC_)
- #define SET_PROC_DESC_IS_DUMMY(proc) ((proc)->isym = _PROC_MAGIC_)
-
- /* 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, 4); \
- if ((op & 0xffff0000) == 0x27bd0000) \
- pc += 4; /* Skip addiu $sp,$sp,offset */ \
- }
-
- /* 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) (CORE_ADDR)read_register(RA_REGNUM)
-
- /* 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))
-
- /* Address of end of stack space. */
-
- #define STACK_END_ADDR 0x7ffff000
-
- /* Stack grows downward. */
-
- #define INNER_THAN <
-
- /* Stack has strict alignment. However, use PUSH_ARGUMENTS
- to take care of it. */
- /*#define STACK_ALIGN(ADDR) (((ADDR)+7)&-8)*/
-
- #define PUSH_ARGUMENTS(nargs, args, sp, struct_return, struct_addr) \
- sp = mips_push_arguments(nargs, args, sp, struct_return, struct_addr)
-
- /* Sequence of bytes for breakpoint instruction. */
-
- #ifdef BYTES_BIG_ENDIAN
- #define BREAKPOINT {0, 0, 0, 13}
- #else
- #define BREAKPOINT {13, 0, 0, 0}
- #endif
-
- /* 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. */
- /* For Mips, this is jr $ra */
-
- #define ABOUT_TO_RETURN(pc) \
- (read_memory_integer (pc, 4) == 0x03e00008)
-
- /* 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 71
-
- /* Initializer for an array of names of registers.
- There should be NUM_REGS strings in this initializer. */
-
- /* Note that the symbol table parsing of scRegister symbols
- * assumes r0=0, ..., r3=31, and f0=32, ... f31=32+31 */
-
- #ifdef NUMERIC_REG_NAMES
- #define REGISTER_NAMES {"r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",\
- "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15",\
- "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23",\
- "r24", "r25", "r26", "r27", "gp", "sp", "r30", "ra", \
- "f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7", \
- "f8", "f9", "f10", "f11", "f12", "f13", "f14", "f15", \
- "f16", "f17", "f18", "f19", "f20", "f21", "f22", "f23",\
- "f24", "f25", "f26", "f27", "f28", "f29", "f30", "f31",\
- "pc", "cause", "hi", "lo", "fcrcs", "fcrir", "fp" };
- #else /* !NUMERIC_REG_NAMES */
- #define REGISTER_NAMES {"zero", "at", "v0", "v1", "a0", "a1", "a2", "a3",\
- "t0", "t1", "t2", "t3", "t4", "t5", "t6", "t7",\
- "s0", "s1", "s2", "s3", "s4", "s5", "s6", "s7",\
- "t8", "t9", "k0", "k1", "gp", "sp", "s8", "ra", \
- "f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7", \
- "f8", "f9", "f10", "f11", "f12", "f13", "f14", "f15", \
- "f16", "f17", "f18", "f19", "f20", "f21", "f22", "f23",\
- "f24", "f25", "f26", "f27", "f28", "f29", "f30", "f31",\
- "pc", "cause", "hi", "lo", "fcrcs", "fcrir", "fp" };
- #endif /* !NUMERIC_REG_NAMES */
-
- /* 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. */
-
- /* Note the FP is a "virtual" register */
- #define SP_REGNUM 29 /* Contains address of top of stack */
- #define RA_REGNUM 31 /* Contains return address value */
- #define FP0_REGNUM 32 /* Floating point register 0 (single float) */
- #define PC_REGNUM 64 /* Contains program counter */
- #define CAUSE_REGNUM 65
- #define HI_REGNUM 66 /* Multiple/divide temp */
- #define LO_REGNUM 67 /* ... */
- #define FCRCS_REGNUM 68 /* FP control/status */
- #define FCRIR_REGNUM 69 /* FP implementation/revision */
- #define FP_REGNUM 70 /* Pseudo register that contains true address of executing stack frame */
-
- /* Define DO_REGISTERS_INFO() to do machine-specific formatting
- of register dumps. */
-
- #define DO_REGISTERS_INFO(_regnum) mips_do_registers_info(_regnum)
-
- /* Total amount of space needed to store our copies of the machine's
- register state, the array `registers'. */
- #define REGISTER_BYTES (4*NUM_REGS)
-
- /* 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.*/
-
- #define REGISTER_RAW_SIZE(N) 4
-
- /* Number of bytes of storage in the program's representation
- for register N.*/
-
- #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), REGISTER_RAW_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_RAW_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 ? builtin_type_int : (N) < PC_REGNUM ? \
- 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. */
-
- #define STORE_STRUCT_RETURN(ADDR, SP) SP = push_word(SP, 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+REGISTER_BYTE (TYPE_CODE (TYPE) == TYPE_CODE_FLT ? FP0_REGNUM : 2), 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 (REGISTER_BYTE (TYPE_CODE (TYPE) == TYPE_CODE_FLT ? FP0_REGNUM : 2), 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)+16))
-
- /* 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 EXTRA_FRAME_INFO \
- char *proc_desc; /* actually, a PDR* */\
- int num_args;\
- struct frame_saved_regs *saved_regs;
- #define INIT_EXTRA_FRAME_INFO(fci) init_extra_frame_info(fci)
-
- #define FRAME_CHAIN(thisframe) (FRAME_ADDR)frame_chain(thisframe)
-
- #define FRAME_CHAIN_VALID(chain, thisframe) (chain != 0)
-
- #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. */
- #define FRAMELESS_FUNCTION_INVOCATION(FI, FRAMELESS) {(FRAMELESS) = 0;}
-
- /* Saved Pc. */
-
- #define FRAME_SAVED_PC(FRAME) frame_saved_pc(FRAME)
-
- /* If the argument is on the stack, it will be here. */
- #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) (numargs = (fi)->num_args)
-
- /* Return number of bytes at start of arglist that are not really args. */
-
- #define FRAME_ARGS_SKIP 0
-
- /* 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) ( \
- (frame_saved_regs) = *(frame_info)->saved_regs, \
- (frame_saved_regs).regs[SP_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 {push_dummy_frame();}
- #if 0
- { 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, 0); \
- write_register (SP_REGNUM, sp); \
- write_register (FP_REGNUM, sp); }
- #endif
-
- /* Discard from the stack the innermost frame, restoring all registers. */
-
- #define POP_FRAME {pop_frame();}
-
- #define MK_OP(op,rs,rt,offset) (((op)<<26)|((rs)<<21)|((rt)<<16)|(offset))
- #define CALL_DUMMY_SIZE 48
- #define Dest_Reg 2
- #define CALL_DUMMY {\
- (017<<26)| (Dest_Reg << 16), /*lui $r31,<target upper 16 bits>*/ \
- MK_OP(13,Dest_Reg,Dest_Reg,0), /*ori $r31,$r31,<lower 16 bits>*/ \
- MK_OP(061,SP_REGNUM,12,0), /* lwc1 $f12,0(sp) */\
- MK_OP(061,SP_REGNUM,13,4), /* lwc1 $f13,4(sp) */\
- MK_OP(061,SP_REGNUM,14,8), /* lwc1 $f14,8(sp) */\
- MK_OP(061,SP_REGNUM,15,12), /* lwc1 $f15,12(sp) */\
- MK_OP(043,SP_REGNUM,4,0), /* lw $r4,0(sp) */\
- MK_OP(043,SP_REGNUM,5,4), /* lw $r5,4(sp) */\
- MK_OP(043,SP_REGNUM,6,8), /* lw $r6,8(sp) */\
- (Dest_Reg<<21) | (31<<11) | 9, /* jalr $r31 */\
- MK_OP(043,SP_REGNUM,7,12), /* lw $r7,12(sp) */\
- 13, /* bpt */\
- }
-
- #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) \
- (*(int *)dummyname |= (((unsigned long)(fun)) >> 16), \
- ((int*)dummyname)[1] |= (unsigned short)(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 { abort(); }
-
- /* 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 { abort(); }
-
- /* Do implement the attach and detach commands. */
-
- #define ATTACH_DETACH
-
- /* It does have a wait structure, and it might help things out . . . */
-
- #define HAVE_WAIT_STRUCT
-
-