475 lines
16 KiB
C
475 lines
16 KiB
C
/* Parameters for execution on the Intel I860 for GDB, the GNU debugger.
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Copyright (C) 1986, 1987 Free Software Foundation, Inc.
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GDB is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY. No author or distributor accepts responsibility to anyone
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for the consequences of using it or for whether it serves any
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particular purpose or works at all, unless he says so in writing.
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Refer to the GDB General Public License for full details.
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Everyone is granted permission to copy, modify and redistribute GDB,
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but only under the conditions described in the GDB General Public
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License. A copy of this license is supposed to have been given to you
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along with GDB so you can know your rights and responsibilities. It
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should be in a file named COPYING. Among other things, the copyright
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notice and this notice must be preserved on all copies.
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In other words, go ahead and share GDB, but don't try to stop
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anyone else from sharing it farther. Help stamp out software hoarding!
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*/
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#ifndef i860
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#define i860 1
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#endif
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#define HAVE_TERMIO
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#define vfork fork
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/* Debugger information will be in COFF format. */
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/* #define COFF_FORMAT */
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#define COFF_NO_LONG_FILE_NAMES
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/* Offset from address of function to start of its code.
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Zero on most machines. */
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#define FUNCTION_START_OFFSET 0
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/* The call instruction puts its return address in register r1 and does
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not change the stack pointer */
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#define RETURN_ADDR_IN_REGISTER
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/* Advance PC across any function entry prologue instructions
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to reach some "real" code. */
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#define SKIP_PROLOGUE(pc) \
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{ pc = skip_prologue (pc); }
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/* Immediately after a function call, return the saved pc.
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Can't go through the frames for this because on some machines
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the new frame is not set up until the new function executes
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some instructions. */
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#define SAVED_PC_AFTER_CALL(frame) \
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(read_register(RP_REGNUM))
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/* Address of end of stack space. */
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#define STACK_END_ADDR 0xfc000000
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/* Stack grows downward. */
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#define INNER_THAN <
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/* Stack has strict alignment. */
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#define ALIGN_STACK(ADDR) (((ADDR)+15)&-16)
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/* Sequence of bytes for breakpoint instruction. */
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#if defined(i860) && defined(BIG_ENDIAN)
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#define BREAKPOINT {0x44, 0x00, 0x00, 0x00}
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#define BREAKFLOAT {0x22, 0x06, 0x00, 0x48}
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#else
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#define BREAKPOINT {0x00, 0x00, 0x00, 0x44}
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#define BREAKFLOAT {0x48, 0x00, 0x06, 0x22}
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#endif
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/* Amount PC must be decremented by after a breakpoint.
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This is often the number of bytes in BREAKPOINT
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but not always. */
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#define DECR_PC_AFTER_BREAK 0
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/* Nonzero if instruction at PC is a return instruction. */
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/* should be "bri r1" */
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#define ABOUT_TO_RETURN(pc) \
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(adj_read_memory_integer (pc) == 0x40000800)
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/* Return 1 if P points to an invalid floating point value. */
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#define INVALID_FLOAT(p, len) 0 /* Just a first guess; not checked */
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/* Largest integer type */
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#define LONGEST long
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/* Name of the builtin type for the LONGEST type above. */
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#define BUILTIN_TYPE_LONGEST builtin_type_long
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/* Say how long (ordinary) registers are. */
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#define REGISTER_TYPE long
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/* Number of machine registers */
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#define NUM_REGS i860REGCOUNT
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/* Initializer for an array of names of registers.
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There should be NUM_REGS strings in this initializer. */
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#define REGISTER_NAMES \
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{ \
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"psr", "fir", "trap", "dbrk", \
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"r0", "r1", "sp", "fp", "r4", "r5", "r6", "r7", \
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"r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", \
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"r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23", \
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"r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31", \
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\
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"f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7", \
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"f8", "f9", "f10", "f11", "f12", "f13", "f14", "f15", \
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"f16", "f17", "f18", "f19", "f20", "f21", "f22", "f23", \
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"f24", "f25", "f26", "f27", "f28", "f29", "f30", "f31", \
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\
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"fsr", \
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"fsr1", "fsr2", "fsr3", \
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"mul1", "", "mul2", "", "mul3", "", \
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"add1", "", "add2", "", "add3", "", \
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"KI", "", "KR", "", "T", "", \
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"MERGE", "", \
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"pfld1", "", "", "", "pfld2", "", "", "", "pfld3", "", "", "", \
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"graph1", "", \
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"fpe_fp1","", "fpe_fp2", "", "fpe_fp3", "", \
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"fpe_fp4", "", \
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"ieee_stat", "fpe_trapped_op", \
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"fpe_fp5","", "fpe_fp6", "", \
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"fpe_rfsr", "","","", \
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"epsr", \
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"ccr", "bear", "err" \
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}
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/* Register numbers of various important registers.
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Note that some of these values are "real" register numbers,
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and correspond to the general registers of the machine,
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and some are "phony" register numbers which are too large
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to be actual register numbers as far as the user is concerned
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but do serve to get the desired values when passed to read_register. */
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#define RP_REGNUM R1 /* Contains return address value */
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#define SP_REGNUM SP /* Contains address of top of stack, */
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#define FP_REGNUM FP /* Contains address of executing stack frame */
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/* which is also the bottom of the frame. */
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#define RTRN RP_REGNUM
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#define R_FP FP /* used by dwarfread.c */
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#define Y_REGNUM R31 /* Temp register for address calc., etc. */
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#define PC_REGNUM PC /* Contains program counter */
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#define PS_REGNUM PSR /* Contains processor status */
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#define FP0_REGNUM FREGS /* Floating point register 0 */
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#define FPS_REGNUM FSR /* Floating point status register */
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#define DB_REGNUM DB /* Debug register */
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/* Total amount of space needed to store our copies of the machine's
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register state, the array `registers'. */
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#define REGISTER_BYTES (NUM_REGS * 4)
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/* Index within `registers' of the first byte of the space for
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register N. */
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#define REGISTER_BYTE(N) ((N)*4)
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/* Number of bytes of storage in the actual machine representation
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for register N. */
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/* On the i860, all regs are 4 bytes. */
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#define REGISTER_RAW_SIZE(N) (4)
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/* Number of bytes of storage in the program's representation
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for register N. */
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/* On the i860, all regs are 4 bytes. */
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#define REGISTER_VIRTUAL_SIZE(N) (4)
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/* Largest value REGISTER_RAW_SIZE can have. */
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#define MAX_REGISTER_RAW_SIZE 8
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/* Largest value REGISTER_VIRTUAL_SIZE can have. */
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#define MAX_REGISTER_VIRTUAL_SIZE 8
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/* Nonzero if register N requires conversion
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from raw format to virtual format. */
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#define REGISTER_CONVERTIBLE(N) (0)
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/* Convert data from raw format for register REGNUM
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to virtual format for register REGNUM. */
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#define REGISTER_CONVERT_TO_VIRTUAL(REGNUM,FROM,TO) \
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{ bcopy ((FROM), (TO), 4); }
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/* Convert data from virtual format for register REGNUM
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to raw format for register REGNUM. */
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#define REGISTER_CONVERT_TO_RAW(REGNUM,FROM,TO) \
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{ bcopy ((FROM), (TO), 4); }
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/* Return the GDB type object for the "standard" data type
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of data in register N. */
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#define REGISTER_VIRTUAL_TYPE(N) \
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((N) < F0 ? builtin_type_int : (N) <= F31 ? builtin_type_float : builtin_type_int)
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/* Store the address of the place in which to copy the structure the
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subroutine will return. This is called from call_function. */
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#define STORE_STRUCT_RETURN(ADDR, SP) { write_register (R16, (ADDR)); }
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/* Extract from an array REGBUF containing the (raw) register state
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a function return value of type TYPE, and copy that, in virtual format,
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into VALBUF. */
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#define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \
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i860_extract_return_value(TYPE, REGBUF, VALBUF)
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/* Write into appropriate registers a function return value
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of type TYPE, given in virtual format. */
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/* On i860, values are returned in register r16. */
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#define STORE_RETURN_VALUE(TYPE,VALBUF) \
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i860_store_return_value(TYPE, VALBUF)
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/* Extract from an array REGBUF containing the (raw) register state
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the address in which a function should return its structure value,
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as a CORE_ADDR (or an expression that can be used as one). */
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#define EXTRACT_STRUCT_VALUE_ADDRESS(REGBUF) \
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(*(int *) ((REGBUF) + REGISTER_BYTE(R16)))
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/* Describe the pointer in each stack frame to the previous stack frame
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(its caller). */
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#include <sys/types.h>
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#include <sys/regset.h>
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#include "i860_reg.h"
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/* FRAME_CHAIN takes a frame's nominal address
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and produces the frame's chain-pointer.
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FRAME_CHAIN_COMBINE takes the chain pointer and the frame's nominal address
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and produces the nominal address of the caller frame.
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However, if FRAME_CHAIN_VALID returns zero,
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it means the given frame is the outermost one and has no caller.
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In that case, FRAME_CHAIN_COMBINE is not used. */
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/* In the case of the i860, the frame-chain's nominal address
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is held in the frame pointer register.
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On the i860 the frame (in %fp) points to %fp for the previous frame.
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*/
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/* our FRAME_CHAIN requires a pointer to all the frame info (e.g. pc)
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*/
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#define FRAME_CHAIN(thisframe) frame_chain(thisframe)
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#define FRAME_CHAIN_COMBINE(chain, thisframe) (chain)
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/* Define other aspects of the stack frame. */
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#define FRAME_SAVED_PC(frame_struct) frame_saved_pc(frame_struct)
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#define FRAME_ARGS_ADDRESS(fi) ((fi)->frame)
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#define FRAME_LOCALS_ADDRESS(fi) ((fi)->frame)
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/* Set VAL to the number of args passed to frame described by FI.
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Can set VAL to -1, meaning no way to tell. */
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/* We can't tell how many args there are */
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#define FRAME_NUM_ARGS(val,fi) (val = -1)
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#define FRAME_STRUCT_ARGS_ADDRESS(fi) ((fi)->frame)
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/* extra stuff in frame structure to support
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* backtraceing thru non fp frame based frames
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* (trace stuff thats not -g compiled)
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*/
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#define EXTRA_FRAME_INFO int is_minus_g; CORE_ADDR sp; CORE_ADDR rp;
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#define INIT_EXTRA_FRAME_INFO(fromleaf,fci) (fci)->is_minus_g = 0; (fci)->sp = 0; (fci)->rp = 0;
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/* Return number of bytes at start of arglist that are not really args. */
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#define FRAME_ARGS_SKIP 8
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/* Put here the code to store, into a struct frame_saved_regs,
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the addresses of the saved registers of frame described by FRAME_INFO.
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This includes special registers such as pc and fp saved in special
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ways in the stack frame. sp is even more special:
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the address we return for it IS the sp for the next frame. */
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/* Grind through the various st.l rx,Y(fp) and fst.z fx,Y(fp) */
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#define FRAME_FIND_SAVED_REGS(frame_info, frame_saved_regs) \
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frame_find_saved_regs(frame_info, &(frame_saved_regs))
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/* Things needed for making the inferior call functions. */
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/* Push an empty stack frame, to record the current PC, etc. */
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/* We have this frame with fp pointing to a block where all GDB-visible
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registers are stored in the order GDB knows them, and sp at the next
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alignment point below fp. Note: fp + NUM_REGS*4 was the old sp
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*/
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#define PUSH_DUMMY_FRAME i860_push_frame()
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/* Discard from the stack the innermost frame,
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restoring all saved registers. */
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#define POP_FRAME i860_pop_frame()
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/* This sequence of words is the instructions:
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*../
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--
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nop
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calli r31
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nop
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trap r0,r0,r0
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--
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Note this is 16 bytes.
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Saving of the registers is done by PUSH_DUMMY_FRAME. The address of the
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function to call will be placed in register r31 prior to starting.
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The arguments have to be put into the parameter registers by GDB after
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the PUSH_DUMMY_FRAME is done. NOTE: GDB expects to push arguments, but
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i860 takes them in registers */
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#ifdef BIG_ENDIAN
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/* account for reversal of instructions in memory */
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#define CALL_DUMMY { \
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0x4c00f802, 0xa0000000, 0x44000000, 0xa0000000 }
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#else
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#define CALL_DUMMY { \
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0xa0000000, 0x4c00F802, 0xa0000000, 0x44000000 }
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#endif
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/* This setup is somewhat unusual. PUSH_DUMMY_FRAME and
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FRAME_FIND_SAVED_REGS conspire to handle dummy frames differently.
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Therefore, CALL_DUMMY can be minimal. We put the address of the called
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function in r31 and let'er rip */
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#define CALL_DUMMY_LENGTH 16
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/* Actually start at the calli */
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#define CALL_DUMMY_START_OFFSET 4
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/* Normally, GDB will patch the dummy code here to put in the function
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address, etc., but we only need to put the call adddress in r31 */
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#define FIX_CALL_DUMMY(dummyname, pc, fun, nargs, args, type, gcc_p) \
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write_register(R31, fun)
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/* i860 has no reliable single step ptrace call */
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#define NO_SINGLE_STEP 1
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#define KERNEL_U_ADDR 0xfc7fe530
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#define REGISTER_U_ADDR(addr,ar0,regno) \
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addr = (REGISTER_BYTE(regno) + ar0 );
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/* How many bytes are pushed on the stack for the argument list
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*/
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#define STACK_ARG_BYTES(RESULT,ARGS,NARGS,STRUCT_RETURN) {(RESULT) = 0;}
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/* Pass arguments to a function
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*/
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#define PUSH_ARGUMENTS(NARGS,ARGS,STACKP,STRUCT_RETURN,STRUCT_ADDR) \
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{ \
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STACKP = (STACKP) & (-16); \
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STACKP = i860_arg_coerce(NARGS, ARGS, STRUCT_RETURN,STACKP); \
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STACKP =pass_function_arguments(ARGS,NARGS,STRUCT_RETURN, STRUCT_ADDR, STACKP); }
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#define CALL_DUMMY_LOCATION AFTER_TEXT_END
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#define NEED_TEXT_START_END
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#define NONSTANDARD_MEMORY_LAYOUT
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/* We support pseudo-frame structure so actual frame pointer value must be
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* read from the register.
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*/
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#define FP_FROM_REGISTER
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/* Support a quit from info register command because we have so many regs
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*/
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#define INFO_REGISTER_QUIT
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/* Identify text or absolute symbols to put in misc function table. In the
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* i860 case, only text symbols not starting with _L00
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*/
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#define MISC_FUNCTION(cs) ((cs)->c_secnum == 1 && (cs)->c_value && \
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strncmp((cs)->c_name, "_L00", 4) != 0)
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/* Define our a.out magic number and undefine the 386 one if it's defined
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*/
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#ifdef I860MAGIC
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#define AOUT_MAGIC I860MAGIC
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#else
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#define AOUT_MAGIC 0515
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#endif
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#ifdef I386MAGIC
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#undef I386MAGIC
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#endif
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/* The aouthdr may be larger than defined in a.out.h
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*/
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#define AOUTHDR_VARIABLE
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/* We have a bug where lineno information is not in symbol table correctly
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*/
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#define LINENO_BUG
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/* Similarly, the Endndx of a structure definition is bogus in ld860
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*/
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/* #define STRUCT_SYMBOL_BUG */
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/* Also, we see T_ARG types when we shouldn't
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*/
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#define T_ARG_BUG
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/* Macro to sign extend to 32 bits */
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#define SIGN_EXT(n,x) (((int) (x) << (32-n)) >> (32-n))
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#define SIGN_EXT16(x) (((int) (x) << (16)) >> (16))
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#define FRAMELESS_FUNCTION_INVOCATION(FI,FRAMELESS) frameless_look_for_prologue(FI)
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#if defined(i860) && defined(BIG_ENDIAN)
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#define ADJ_PC(pc) ((unsigned)pc ^ 4)
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#define ADJ_FREG(freg) (F0 + (((freg) - F0) ^ 1))
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#define ADJ_FREG_BYTE(freg) (REGISTER_BYTE(F0) + (((freg) - REGISTER_BYTE(F0)) ^ REGISTER_BYTE(1)))
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#else
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#define ADJ_PC(pc) (pc)
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#define ADJ_FREG(freg) (freg)
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#define ADJ_FREG_BYTE(freg) (freg)
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#endif
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/* define DO_REGISTERS_INFO to do i860-specific formatting */
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#define DO_REGISTERS_INFO(regnum,fpregs) i860_do_registers_info(regnum,fpregs)
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/* the two low order bits of the return pointer are ignored when returning; some systems store information
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in them. To avoid confusing the stack trace, provide this macro to "clean" the two low order bits */
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#define CLEAN_PC(pc) ((unsigned) pc & 0xfffffffc)
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#define adj_target_read_memory(memaddr,myaddr,len) target_read_memory(ADJ_PC(memaddr),myaddr,len)
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#define adj_target_write_memory(memaddr,myaddr,len) target_write_memory(ADJ_PC(memaddr),myaddr,len)
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#define adj_read_memory_integer(memaddr) read_memory_integer(ADJ_PC(memaddr),4)
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#define adj_read_memory(memaddr,myaddr,len) read_memory(ADJ_PC(memaddr),myaddr,len)
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#define adj_write_memory(memaddr,myaddr,len) write_memory(ADJ_PC(memaddr),myaddr,len)
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#define INIT_FRAME_PC(fromleaf, prev) \
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{ struct frame_info *nextframe = prev->next; \
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if (nextframe->rp) \
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{ prev->pc = CLEAN_PC( nextframe ->rp); \
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prev->rp = 0; } \
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else prev->pc = CLEAN_PC((fromleaf ? SAVED_PC_AFTER_CALL (prev->next) : \
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prev->next ? FRAME_SAVED_PC (prev->next) : read_pc ())); }
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#define INTERNAL_REGISTER_VAL(regno) regno+R0
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/* used to indicate that the misc function vector has size information about
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misc functions -- currently true for elf format only -- mlf */
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#define MISC_FUNCTIONS_HAS_SIZE
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#define FRAME_GET_BASEREG_VALUE(frame,basereg) get_saved_basereg(frame, basereg);
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