Johns release

1 files changed, 363 insertions, 0 deletions

diff --git a/gdb/tm-mips.h b/gdb/tm-mips.h
new file mode 100644
index 0000000..6fd681d
--- /dev/null
+++ b/gdb/tm-mips.h
@@ -0,0 +1,363 @@
+/* Definitions to make GDB run on a mips box under 4.3bsd.
+   Copyright (C) 1986, 1987, 1989 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.
+
+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.  */
+
+#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, 0x5, 0, 0xd}
+#else
+#define BREAKPOINT {0xd, 0, 0x5, 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 73
+
+/* 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" \
+    }
+
+/* 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 SP_REGNUM 29		/* Contains address of top of stack */
+#define PC_REGNUM 37		/* Contains program counter */
+#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 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 DO_REGISTERS_INFO() to do machine-specific formatting
+   of register dumps. */
+
+#define DO_REGISTERS_INFO(_regnum) mips_do_registers_info(_regnum)
+
+#define REGISTER_U_ADDR(addr, blockend, regno) 		\
+   if (blockend == 0) {					\
+	if (regno < 38) addr = (NBPG*UPAGES) + (regno - 38)*sizeof(int);\
+	else addr = 0; /* ..somewhere in the pcb */	\
+   } else if (regno < 32) addr = regno;			\
+   else if (regno == PC_REGNUM) addr = 96;		\
+   else if (regno == 36) addr = 97;			\
+   else if (regno == HI_REGNUM) addr = 98;		\
+   else if (regno == LO_REGNUM) addr = 99;		\
+   else if (regno == FCRCS_REGNUM) addr = 100;		\
+   else if (regno == FCRIR_REGNUM) addr = 101;		\
+   else if (regno >= FP0_REGNUM) addr = regno - (FP0_REGNUM-32);\
+   else addr = 0;
+
+/* 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.
+
+   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.  */
+
+#define FRAME_CHAIN(thisframe) (FRAME_ADDR)mips_frame_chain(thisframe)
+
+#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.  */
+/* 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 {
+	unsigned long	adr;	/* memory address of start of procedure */
+	long	isym;		/* pointer to procedure symbol */
+	long	pad2;		/* iline: start of line number entries*/
+	long	regmask;	/* save register mask */
+	long	regoffset;	/* save register offset */
+	long	numargs;	/* number of args to procedure (was iopt) */
+	long	fregmask;	/* save floating point register mask */
+	long	fregoffset;	/* save floating point register offset */
+	long	framesize;	/* frameoffset: frame size */
+	short	framereg;	/* frame pointer register */
+	short	pcreg;		/* offset or reg of return pc */
+	long	lnLow;		/* lowest line in the procedure */
+	long	lnHigh;		/* highest line in the procedure */
+	long	pad3;		/* cbLineOffset: byte offset for this procedure from the fd base */
+} *mips_extra_func_info_t;
+
+#define EXTRA_FRAME_INFO \
+  char *proc_desc; /* actually, a mips_extra_func_info_t */\
+  int num_args;\
+  struct frame_saved_regs *saved_regs;
+
+#define INIT_EXTRA_FRAME_INFO(fci) init_extra_frame_info(fci)