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494 lines
17 KiB
C
494 lines
17 KiB
C
/* Parameters for execution on a Sun 4, for GDB, the GNU debugger.
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Copyright (C) 1986, 1987 Free Software Foundation, Inc.
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Contributed by Michael Tiemann (tiemann@mcc.com)
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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 sun4
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#define sun4
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#endif
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/* Get rid of any system-imposed stack limit if possible. */
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#define SET_STACK_LIMIT_HUGE
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/* Define this if the C compiler puts an underscore at the front
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of external names before giving them to the linker. */
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#define NAMES_HAVE_UNDERSCORE
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/* Debugger information will be in DBX format. */
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#define READ_DBX_FORMAT
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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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/* 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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/* On the Sun 4 under SunOS, the compile will leave a fake insn which
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encodes the structure size being returned. If we detect such
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a fake insn, step past it. */
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#define PC_ADJUST(pc) ((read_memory_integer (pc + 8, 4) & 0xfffffe00) == 0 ? pc+12 : pc+8)
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#define SAVED_PC_AFTER_CALL(frame) PC_ADJUST (read_register (RP_REGNUM))
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/* Address of end of stack space. */
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#define STACK_END_ADDR 0xf000000
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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 STACK_ALIGN(ADDR) (((ADDR)+7)&-8)
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/* Sequence of bytes for breakpoint instruction. */
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#define BREAKPOINT {0x91, 0xd0, 0x20, 0x01}
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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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/* For SPARC, this is either a "jmpl %o7+8,%g0" or "jmpl %i7+8,%g0".
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Note: this does not work for functions returning structures under SunOS. */
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#define ABOUT_TO_RETURN(pc) \
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((read_memory_integer (pc, 4)|0x00040000) == 0x81c7e008)
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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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/* 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 72
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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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{ "g0", "g1", "g2", "g3", "g4", "g5", "g6", "g7", \
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"o0", "o1", "o2", "o3", "o4", "o5", "sp", "o7", \
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"l0", "l1", "l2", "l3", "l4", "l5", "l6", "l7", \
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"i0", "i1", "i2", "i3", "i4", "i5", "fp", "i7", \
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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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"y", "psr", "wim", "tbr", "pc", "npc", "fpsr", "cpsr" };
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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 FP_REGNUM 30 /* Contains address of executing stack frame */
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#define RP_REGNUM 15 /* Contains return address value, *before* \
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any windows get switched. */
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#define SP_REGNUM 14 /* Contains address of top of stack, \
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which is also the bottom of the frame. */
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#define Y_REGNUM 64 /* Temp register for multiplication, etc. */
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#define PS_REGNUM 65 /* Contains processor status */
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#define PC_REGNUM 68 /* Contains program counter */
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#define NPC_REGNUM 69 /* Contains next PC */
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#define FP0_REGNUM 32 /* Floating point register 0 */
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#define FPS_REGNUM 70 /* Floating point status register */
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#define CPS_REGNUM 71 /* Coprocessor status 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 (32*4+32*4+8*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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/* ?? */
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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 SPARC, 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 SPARC, 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) < 32 ? builtin_type_int : (N) < 64 ? builtin_type_float : builtin_type_int)
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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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bcopy ((int *)REGBUF+8, VALBUF, TYPE_LENGTH (TYPE))
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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 sparc, values are returned in register %o0. */
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#define STORE_RETURN_VALUE(TYPE,VALBUF) \
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write_register_bytes (REGISTER_BYTE (8), VALBUF, TYPE_LENGTH (TYPE))
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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) (read_memory_integer (((int *)(REGBUF))[SP_REGNUM]+(16*4), 4))
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/* Enable use of alternate code to read and write registers. */
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#define NEW_SUN_PTRACE
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/* Enable use of alternate code for Sun's format of core dump file. */
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#define NEW_SUN_CORE
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/* Do implement the attach and detach commands. */
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#define ATTACH_DETACH
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/* It is safe to look for symsegs on a Sun, because Sun's ld
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does not screw up with random garbage at end of file. */
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#define READ_GDB_SYMSEGS
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/* The SPARC processor has register windows. */
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#define HAVE_REGISTER_WINDOWS
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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 <machine/reg.h>
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#define GET_RWINDOW_REG(FRAME, REG) \
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(read_memory_integer (&((struct rwindow *)FRAME)->REG, 4))
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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 Sun 4, the frame-chain's nominal address
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is held in the frame pointer register.
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On the Sun4, the frame (in %fp) is %sp for the previous frame.
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From the previous frame's %sp, we can find the previous frame's
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%fp: it is in the save area just above the previous frame's %sp. */
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#define FRAME_CHAIN(thisframe) \
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GET_RWINDOW_REG (thisframe, rw_in[6])
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#define FRAME_CHAIN_VALID(chain, thisframe) \
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(chain != 0 && (FRAME_SAVED_PC (thisframe, 0) >= first_object_file_end))
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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, next_frame) frame_saved_pc (frame, next_frame)
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/* If the argument is on the stack, it will be here. */
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#define FRAME_ARGS_ADDRESS(fi) (fi.frame)
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#define FRAME_STRUCT_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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now that the C compiler delays popping them. */
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#define FRAME_NUM_ARGS(val,fi) (val = -1)
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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 68
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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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On the Sun 4, the only time all registers are saved is when
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a dummy frame is involved. Otherwise, the only saved registers
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are the LOCAL and IN registers which are saved as a result
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of the "save/restore" opcodes. This condition is determined
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by address rather than by value. */
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#define FRAME_FIND_SAVED_REGS(fi, frame_saved_regs) \
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{ register int regnum; \
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register CORE_ADDR pc; \
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FRAME frame = (fi).frame; \
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FRAME next_frame = (fi).next_frame; \
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bzero (&frame_saved_regs, sizeof frame_saved_regs); \
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if ((fi).pc >= frame - CALL_DUMMY_LENGTH - 0x140 \
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&& (fi).pc <= frame) \
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{ \
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for (regnum = 0; regnum < 32; regnum++) \
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(frame_saved_regs).regs[regnum+FP0_REGNUM] = frame + regnum * 4 - 0x80;\
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for (regnum = 1; regnum < 8; regnum++) \
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(frame_saved_regs).regs[regnum] = frame + regnum * 4 - 0xa0; \
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for (regnum = 0; regnum < 8; regnum++) \
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(frame_saved_regs).regs[regnum+24] = frame + regnum * 4 - 0xc0; \
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for (regnum = 0; regnum < 8; regnum++) \
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(frame_saved_regs).regs[regnum+64] = frame + regnum * 4 - 0xe0; \
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frame = (fi).next_frame ? \
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(fi).next_frame : read_register (SP_REGNUM); \
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} \
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else \
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{ \
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for (regnum = 0; regnum < 16; regnum++) \
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(frame_saved_regs).regs[regnum+16] = frame + regnum * 4; \
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} \
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if (next_frame == 0) next_frame = read_register (SP_REGNUM); \
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for (regnum = 0; regnum < 8; regnum++) \
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(frame_saved_regs).regs[regnum+8] = next_frame + regnum * 4; \
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(frame_saved_regs).regs[FP_REGNUM] = frame + 14*4; \
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(frame_saved_regs).regs[SP_REGNUM] = frame; \
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(frame_saved_regs).regs[PC_REGNUM] = frame + 15*4; \
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}
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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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/* NOTE: to be perfectly correct, we will probably have to restore the
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IN registers (which were the OUT registers of the calling frame). */
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#define PUSH_DUMMY_FRAME \
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{ extern char registers[]; \
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register int regnum; \
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CORE_ADDR fp = read_register (FP_REGNUM); \
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CORE_ADDR pc = read_register (PC_REGNUM); \
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void do_save_insn (); \
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supply_register (RP_REGNUM, &pc); \
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do_save_insn (0x140); \
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fp = read_register (FP_REGNUM); \
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write_memory (fp - 0x80, ®isters[REGISTER_BYTE (FP0_REGNUM)], 32 * 4); \
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write_memory (fp - 0xa0, ®isters[REGISTER_BYTE (0)], 8 * 4); \
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write_memory (fp - 0xc0, ®isters[REGISTER_BYTE (24)], 8 * 4); \
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write_memory (fp - 0xe0, ®isters[REGISTER_BYTE (64)], 8 * 4); \
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}
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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 \
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{ register CORE_ADDR fp = read_register (FP_REGNUM); \
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register int regnum; \
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struct frame_saved_regs fsr; \
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struct frame_info fi; \
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char raw_buffer_fp[REGISTER_BYTES]; \
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char raw_buffer_globals[REGISTER_BYTES]; \
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char raw_buffer_outs[REGISTER_BYTES]; \
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char raw_buffer_xx[REGISTER_BYTES]; \
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void do_restore_insn (); \
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fi = get_frame_info (fp); \
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get_frame_saved_regs (&fi, &fsr); \
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if (fsr.regs[FP0_REGNUM]) \
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read_memory (fsr.regs[FP0_REGNUM], raw_buffer_fp, 32 * 4); \
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if (fsr.regs[1]) \
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read_memory (fsr.regs[1], raw_buffer_globals, 7 * 4); \
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if (fsr.regs[24]) \
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read_memory (fsr.regs[24], raw_buffer_outs, 8 * 4); \
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if (fsr.regs[64]) \
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read_memory (fsr.regs[64], raw_buffer_xx, 8 * 4); \
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do_restore_insn (fsr.regs); \
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if (fsr.regs[FP0_REGNUM]) \
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write_register_bytes (REGISTER_BYTE (FP0_REGNUM), raw_buffer_fp, 32 * 4); \
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if (fsr.regs[1]) \
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write_register_bytes (REGISTER_BYTE (1), raw_buffer_globals, 7 * 4);\
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if (fsr.regs[24]) \
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write_register_bytes (REGISTER_BYTE (8), raw_buffer_outs, 8 * 4); \
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if (fsr.regs[64]) \
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write_register_bytes (REGISTER_BYTE (64), raw_buffer_xx, 8 * 4); \
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set_current_frame (read_register (FP_REGNUM)); \
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}
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/* This sequence of words is the instructions
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save %sp,-0x140,%sp
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std %f30,[%fp-0x08]
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std %f28,[%fp-0x10]
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std %f26,[%fp-0x18]
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std %f24,[%fp-0x20]
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std %f22,[%fp-0x28]
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std %f20,[%fp-0x30]
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std %f18,[%fp-0x38]
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std %f16,[%fp-0x40]
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std %f14,[%fp-0x48]
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std %f12,[%fp-0x50]
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std %f10,[%fp-0x58]
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std %f8,[%fp-0x60]
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std %f6,[%fp-0x68]
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std %f4,[%fp-0x70]
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std %f2,[%fp-0x78]
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std %f0,[%fp-0x80]
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std %g6,[%fp-0x88]
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std %g4,[%fp-0x90]
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std %g2,[%fp-0x98]
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std %g0,[%fp-0xa0]
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std %i6,[%fp-0xa8]
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std %i4,[%fp-0xb0]
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std %i2,[%fp-0xb8]
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std %i0,[%fp-0xc0]
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nop ! stcsr [%fp-0xc4]
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nop ! stfsr [%fp-0xc8]
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nop ! wr %npc,[%fp-0xcc]
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nop ! wr %pc,[%fp-0xd0]
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rd %tbr,%o0
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st %o0,[%fp-0xd4]
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rd %wim,%o1
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st %o0,[%fp-0xd8]
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rd %psr,%o0
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st %o0,[%fp-0xdc]
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rd %y,%o0
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st %o0,[%fp-0xe0]
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/..* The arguments are pushed at this point by GDB;
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no code is needed in the dummy for this.
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The CALL_DUMMY_START_OFFSET gives the position of
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the following call instruction. *../
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ld [%sp+0x58],%o5
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ld [%sp+0x44],%o4
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ld [%sp+0x50],%o3
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ld [%sp+0x4c],%o2
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ld [%sp+0x48],%o1
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call 0x34343434
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ld [%sp+0x44],%o0
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nop
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ta 1
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nop
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note that this is 192 bytes, which is a multiple of 8 (not only 4) bytes.
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note that the `call' insn is a relative, not an absolute call.
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note that the `nop' at the end is needed to keep the trap from
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clobbering things (if NPC pointed to garbage instead).
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We actually start executing at the `sethi', since the pushing of the
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registers (as arguments) is done by PUSH_DUMMY_FRAME. If this were
|
||
real code, the arguments for the function called by the CALL would be
|
||
pushed between the list of ST insns and the CALL, and we could allow
|
||
it to execute through. But the arguments have to be pushed by GDB
|
||
after the PUSH_DUMMY_FRAME is done, and we cannot allow these ST
|
||
insns to be performed again, lest the registers saved be taken for
|
||
arguments. */
|
||
|
||
#define CALL_DUMMY { 0x9de3bee0, 0xfd3fbff8, 0xf93fbff0, 0xf53fbfe8, \
|
||
0xf13fbfe0, 0xed3fbfd8, 0xe93fbfd0, 0xe53fbfc8, \
|
||
0xe13fbfc0, 0xdd3fbfb8, 0xd93fbfb0, 0xd53fbfa8, \
|
||
0xd13fbfa0, 0xcd3fbf98, 0xc93fbf90, 0xc53fbf88, \
|
||
0xc13fbf80, 0xcc3fbf78, 0xc83fbf70, 0xc43fbf68, \
|
||
0xc03fbf60, 0xfc3fbf58, 0xf83fbf50, 0xf43fbf48, \
|
||
0xf03fbf40, 0x01000000, 0x01000000, 0x01000000, \
|
||
0x01000000, 0x91580000, 0xd027bf50, 0x93500000, \
|
||
0xd027bf4c, 0x91480000, 0xd027bf48, 0x91400000, \
|
||
0xd027bf44, 0xda03a058, 0xd803a044, 0xd603a050, \
|
||
0xd403a04c, 0xd203a048, 0x40000000, 0xd003a044, \
|
||
0x01000000, 0x91d02001, 0x01000000, 0x01000000}
|
||
|
||
#define CALL_DUMMY_LENGTH 192
|
||
|
||
#define CALL_DUMMY_START_OFFSET 148
|
||
|
||
#define CALL_DUMMY_STACK_ADJUST 68
|
||
|
||
/* 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 *)((char *) dummyname+168) = (0x40000000|((fun-(pc+168))>>2)); \
|
||
if (TYPE_CODE (type) == TYPE_CODE_STRUCT || TYPE_CODE (type) == TYPE_CODE_UNION) \
|
||
*(int *)((char *) dummyname+176) = (TYPE_LENGTH (type) & 0x1fff); \
|
||
}
|
||
|
||
/* Sparc has no reliable single step ptrace call */
|
||
|
||
#define NO_SINGLE_STEP 1
|
||
|
||
/* KDB stuff flushed for now. */
|