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- /* Definitions to make GDB run on a mips box under 4.3bsd.
- Copyright (C) 1986, 1987, 1989, 1991, 1992 Free Software Foundation, Inc.
- Contributed by Per Bothner (bothner@cs.wisc.edu) at U.Wisconsin
- and by Alessandro Forin (af@cs.cmu.edu) at CMU.
-
- This file is part of GDB.
-
- This program 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 2 of the License, or
- (at your option) any later version.
-
- This program 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 this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
-
- #include "coff/sym.h" /* Needed for PDR below. */
- #include "coff/symconst.h"
-
- #ifdef sprite
- #include <kernel/vmPmaxConst.h>
- #define NBPG VMMACH_PAGE_SIZE
- #define UPAGES 0
- #endif
-
- #if !defined (TARGET_BYTE_ORDER)
- #define TARGET_BYTE_ORDER LITTLE_ENDIAN
- #endif
-
- /* Floating point is IEEE compliant */
- #define IEEE_FLOAT
-
- /* 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 mips' format */
-
- #define READ_MIPS_FORMAT
-
- /* File format is coff, but with additions */
-
- #define COFF_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) pc = mips_skip_prologue(pc)
-
- /* 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_register(RA_REGNUM)
-
- /* Are we currently handling a signal */
-
- #define IN_SIGTRAMP(pc, name) in_sigtramp(pc, name)
-
- /* Address of end of stack space. */
-
- #define STACK_END_ADDR (0x7ffff000)
-
- /* Stack grows downward. */
-
- #define INNER_THAN <
-
- #define BIG_ENDIAN 4321
- #if TARGET_BYTE_ORDER == BIG_ENDIAN
- #define BREAKPOINT {0, 0, 0, 0xd}
- #else
- #define BREAKPOINT {0xd, 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. "j ra" on mips. */
-
- #define ABOUT_TO_RETURN(pc) (read_memory_integer (pc, 4) == 0x3e00008)
-
- /* Return 1 if P points to an invalid floating point value. */
-
- #define INVALID_FLOAT(p,l) isa_NAN(p,l)
-
- /* Say how long (all) registers are. */
-
- #define REGISTER_TYPE long
-
- /* Number of machine registers */
-
- #define NUM_REGS 80
-
- /* Initializer for an array of names of registers.
- There should be NUM_REGS strings in this initializer. */
-
- #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", \
- "sr", "lo", "hi", "bad", "cause","pc", \
- "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",\
- "fsr", "fir", "fp", "inx", "rand", "tlblo","ctxt", "tlbhi",\
- "epc", "prid"\
- }
-
- /* 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 ZERO_REGNUM 0 /* read-only register, always 0 */
- #define A0_REGNUM 4 /* Loc of first arg during a subr call */
- #define SP_REGNUM 29 /* Contains address of top of stack */
- #define RA_REGNUM 31 /* Contains return address value */
- #define PS_REGNUM 32 /* Contains processor status */
- #define HI_REGNUM 34 /* Multiple/divide temp */
- #define LO_REGNUM 33 /* ... */
- #define BADVADDR_REGNUM 35 /* bad vaddr for addressing exception */
- #define CAUSE_REGNUM 36 /* describes last exception */
- #define PC_REGNUM 37 /* Contains program counter */
- #define FP0_REGNUM 38 /* Floating point register 0 (single float) */
- #define FCRCS_REGNUM 70 /* FP control/status */
- #define FCRIR_REGNUM 71 /* FP implementation/revision */
- #define FP_REGNUM 72 /* Pseudo register that contains true address of executing stack frame */
- #define FIRST_EMBED_REGNUM 73 /* First supervisor register for embedded use */
- #define LAST_EMBED_REGNUM 79 /* Last one */
-
- /* Define DO_REGISTERS_INFO() to do machine-specific formatting
- of register dumps. */
-
- #define DO_REGISTERS_INFO(_regnum, fp) mips_do_registers_info(_regnum, fp)
-
- /* Total amount of space needed to store our copies of the machine's
- register state, the array `registers'. */
- #define REGISTER_BYTES (NUM_REGS*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 mips, 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 mips, 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) \
- { 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. XXX floats */
-
- #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))
-
- /* Structures are returned by ref in extra arg0 */
- #define USE_STRUCT_CONVENTION(gcc_p, type) 1
-
-
- /* 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. */
-
- #define FRAME_CHAIN(thisframe) (FRAME_ADDR)mips_frame_chain(thisframe)
-
- /* 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. */
- /* We handle this differently for mips, and maybe we should not */
-
- #define FRAMELESS_FUNCTION_INVOCATION(FI, FRAMELESS) {(FRAMELESS) = 0;}
-
- /* Saved Pc. */
-
- #define FRAME_SAVED_PC(FRAME) (mips_frame_saved_pc(FRAME))
-
- #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(num, fi) (num = mips_frame_num_args(fi))
-
- /* 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. */
-
- /* Stack has strict alignment. However, use PUSH_ARGUMENTS
- to take care of it. */
- /*#define STACK_ALIGN(addr) (((addr)+3)&~3)*/
-
- #define PUSH_ARGUMENTS(nargs, args, sp, struct_return, struct_addr) \
- sp = mips_push_arguments(nargs, args, sp, struct_return, struct_addr)
-
- /* Push an empty stack frame, to record the current PC, etc. */
-
- #define PUSH_DUMMY_FRAME mips_push_dummy_frame()
-
- /* Discard from the stack the innermost frame, restoring all registers. */
-
- #define POP_FRAME mips_pop_frame()
-
- #define MK_OP(op,rs,rt,offset) (((op)<<26)|((rs)<<21)|((rt)<<16)|(offset))
- #define CALL_DUMMY_SIZE (16*4)
- #define Dest_Reg 2
- #define CALL_DUMMY {\
- MK_OP(0,RA_REGNUM,0,8), /* jr $ra # Fake ABOUT_TO_RETURN ...*/\
- 0, /* nop # ... to stop raw backtrace*/\
- 0x27bd0000, /* addu sp,?0 # Pseudo prologue */\
- /* Start here: */\
- MK_OP(061,SP_REGNUM,12,0), /* lwc1 $f12,0(sp) # Reload first 4 args*/\
- 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) # Re-load FP regs*/\
- MK_OP(043,SP_REGNUM,5,4), /* lw $r5,4(sp) */\
- MK_OP(043,SP_REGNUM,6,8), /* lw $r6,8(sp) */\
- MK_OP(043,SP_REGNUM,7,12), /* lw $r7,12(sp) */\
- (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>*/ \
- (Dest_Reg<<21) | (31<<11) | 9, /* jalr $r31 */\
- MK_OP(043,SP_REGNUM,7,12), /* lw $r7,12(sp) */\
- 0x5000d, /* bpt */\
- }
-
- #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, start_sp, fun, nargs, args, rettype, gcc_p)\
- (((int*)dummyname)[11] |= (((unsigned long)(fun)) >> 16), \
- ((int*)dummyname)[12] |= (unsigned short)(fun))
-
- /* Specific information about a procedure.
- This overlays the MIPS's PDR records,
- mipsread.c (ab)uses this to save memory */
-
- typedef struct mips_extra_func_info {
- long numargs; /* number of args to procedure (was iopt) */
- PDR pdr; /* Procedure descriptor record */
- } *mips_extra_func_info_t;
-
- #define EXTRA_FRAME_INFO \
- mips_extra_func_info_t proc_desc; \
- int num_args;\
- struct frame_saved_regs *saved_regs;
-
- #define INIT_EXTRA_FRAME_INFO(fromleaf, fci) init_extra_frame_info(fci)
-
- #define STAB_REG_TO_REGNUM(num) ((num) < 32 ? (num) : (num)+FP0_REGNUM-32)
-
- /* Size of elements in jmpbuf */
-
- #define JB_ELEMENT_SIZE 4
-
- /* Figure out where the longjmp will land. We expect that we have just entered
- longjmp and haven't yet setup the stack frame, so the args are still in the
- argument regs. a0 (CALL_ARG0) points at the jmp_buf structure from which we
- extract the pc (JB_PC) that we will land at. The pc is copied into ADDR.
- This routine returns true on success */
-
- /* Note that caller must #include <setjmp.h> in order to get def of JB_* */
- #define GET_LONGJMP_TARGET(ADDR) get_longjmp_target(ADDR)
-