588 lines
26 KiB
C
588 lines
26 KiB
C
// OBSOLETE /* Target machine description for generic Motorola 88000, for GDB.
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// OBSOLETE
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// OBSOLETE Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1993, 1994, 1996,
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// OBSOLETE 1998, 1999, 2000, 2002 Free Software Foundation, Inc.
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// OBSOLETE
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// OBSOLETE This file is part of GDB.
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// OBSOLETE
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// OBSOLETE This program is free software; you can redistribute it and/or modify
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// OBSOLETE it under the terms of the GNU General Public License as published by
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// OBSOLETE the Free Software Foundation; either version 2 of the License, or
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// OBSOLETE (at your option) any later version.
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// OBSOLETE
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// OBSOLETE This program is distributed in the hope that it will be useful,
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// OBSOLETE but WITHOUT ANY WARRANTY; without even the implied warranty of
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// OBSOLETE MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// OBSOLETE GNU General Public License for more details.
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// OBSOLETE
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// OBSOLETE You should have received a copy of the GNU General Public License
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// OBSOLETE along with this program; if not, write to the Free Software
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// OBSOLETE Foundation, Inc., 59 Temple Place - Suite 330,
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// OBSOLETE Boston, MA 02111-1307, USA. */
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// OBSOLETE
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// OBSOLETE #include "doublest.h"
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// OBSOLETE #include "regcache.h"
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// OBSOLETE
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// OBSOLETE /* g++ support is not yet included. */
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// OBSOLETE
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// OBSOLETE /* We cache information about saved registers in the frame structure,
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// OBSOLETE to save us from having to re-scan function prologues every time
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// OBSOLETE a register in a non-current frame is accessed. */
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// OBSOLETE
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// OBSOLETE #define EXTRA_FRAME_INFO \
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// OBSOLETE struct frame_saved_regs *fsr; \
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// OBSOLETE CORE_ADDR locals_pointer; \
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// OBSOLETE CORE_ADDR args_pointer;
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// OBSOLETE
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// OBSOLETE /* Zero the frame_saved_regs pointer when the frame is initialized,
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// OBSOLETE so that FRAME_FIND_SAVED_REGS () will know to allocate and
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// OBSOLETE initialize a frame_saved_regs struct the first time it is called.
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// OBSOLETE Set the arg_pointer to -1, which is not valid; 0 and other values
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// OBSOLETE indicate real, cached values. */
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// OBSOLETE
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// OBSOLETE #define INIT_EXTRA_FRAME_INFO(fromleaf, fi) \
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// OBSOLETE init_extra_frame_info (fromleaf, fi)
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// OBSOLETE extern void init_extra_frame_info ();
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// OBSOLETE
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// OBSOLETE /* Offset from address of function to start of its code.
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// OBSOLETE Zero on most machines. */
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// OBSOLETE
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// OBSOLETE #define FUNCTION_START_OFFSET 0
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// OBSOLETE
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// OBSOLETE /* Advance PC across any function entry prologue instructions
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// OBSOLETE to reach some "real" code. */
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// OBSOLETE
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// OBSOLETE extern CORE_ADDR m88k_skip_prologue (CORE_ADDR);
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// OBSOLETE #define SKIP_PROLOGUE(frompc) (m88k_skip_prologue (frompc))
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// OBSOLETE
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// OBSOLETE /* The m88k kernel aligns all instructions on 4-byte boundaries. The
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// OBSOLETE kernel also uses the least significant two bits for its own hocus
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// OBSOLETE pocus. When gdb receives an address from the kernel, it needs to
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// OBSOLETE preserve those right-most two bits, but gdb also needs to be careful
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// OBSOLETE to realize that those two bits are not really a part of the address
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// OBSOLETE of an instruction. Shrug. */
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// OBSOLETE
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// OBSOLETE extern CORE_ADDR m88k_addr_bits_remove (CORE_ADDR);
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// OBSOLETE #define ADDR_BITS_REMOVE(addr) m88k_addr_bits_remove (addr)
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// OBSOLETE
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// OBSOLETE /* Immediately after a function call, return the saved pc.
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// OBSOLETE Can't always go through the frames for this because on some machines
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// OBSOLETE the new frame is not set up until the new function executes
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// OBSOLETE some instructions. */
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// OBSOLETE
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// OBSOLETE #define SAVED_PC_AFTER_CALL(frame) \
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// OBSOLETE (ADDR_BITS_REMOVE (read_register (SRP_REGNUM)))
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// OBSOLETE
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// OBSOLETE /* Stack grows downward. */
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// OBSOLETE
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// OBSOLETE #define INNER_THAN(lhs,rhs) ((lhs) < (rhs))
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// OBSOLETE
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// OBSOLETE /* Sequence of bytes for breakpoint instruction. */
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// OBSOLETE
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// OBSOLETE /* instruction 0xF000D1FF is 'tb0 0,r0,511'
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// OBSOLETE If Bit bit 0 of r0 is clear (always true),
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// OBSOLETE initiate exception processing (trap).
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// OBSOLETE */
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// OBSOLETE #define BREAKPOINT {0xF0, 0x00, 0xD1, 0xFF}
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// OBSOLETE
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// OBSOLETE /* Amount PC must be decremented by after a breakpoint.
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// OBSOLETE This is often the number of bytes in BREAKPOINT
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// OBSOLETE but not always. */
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// OBSOLETE
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// OBSOLETE #define DECR_PC_AFTER_BREAK 0
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// OBSOLETE
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// OBSOLETE /* Say how long (ordinary) registers are. This is a piece of bogosity
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// OBSOLETE used in push_word and a few other places; REGISTER_RAW_SIZE is the
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// OBSOLETE real way to know how big a register is. */
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// OBSOLETE
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// OBSOLETE #define REGISTER_SIZE 4
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// OBSOLETE
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// OBSOLETE /* Number of machine registers */
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// OBSOLETE
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// OBSOLETE #define GP_REGS (38)
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// OBSOLETE #define FP_REGS (32)
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// OBSOLETE #define NUM_REGS (GP_REGS + FP_REGS)
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// OBSOLETE
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// OBSOLETE /* Initializer for an array of names of registers.
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// OBSOLETE There should be NUM_REGS strings in this initializer. */
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// OBSOLETE
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// OBSOLETE #define REGISTER_NAMES {\
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// OBSOLETE "r0",\
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// OBSOLETE "r1",\
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// OBSOLETE "r2",\
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// OBSOLETE "r3",\
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// OBSOLETE "r4",\
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// OBSOLETE "r5",\
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// OBSOLETE "r6",\
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// OBSOLETE "r7",\
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// OBSOLETE "r8",\
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// OBSOLETE "r9",\
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// OBSOLETE "r10",\
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// OBSOLETE "r11",\
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// OBSOLETE "r12",\
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// OBSOLETE "r13",\
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// OBSOLETE "r14",\
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// OBSOLETE "r15",\
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// OBSOLETE "r16",\
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// OBSOLETE "r17",\
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// OBSOLETE "r18",\
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// OBSOLETE "r19",\
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// OBSOLETE "r20",\
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// OBSOLETE "r21",\
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// OBSOLETE "r22",\
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// OBSOLETE "r23",\
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// OBSOLETE "r24",\
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// OBSOLETE "r25",\
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// OBSOLETE "r26",\
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// OBSOLETE "r27",\
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// OBSOLETE "r28",\
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// OBSOLETE "r29",\
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// OBSOLETE "r30",\
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// OBSOLETE "r31",\
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// OBSOLETE "psr",\
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// OBSOLETE "fpsr",\
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// OBSOLETE "fpcr",\
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// OBSOLETE "sxip",\
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// OBSOLETE "snip",\
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// OBSOLETE "sfip",\
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// OBSOLETE "x0",\
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// OBSOLETE "x1",\
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// OBSOLETE "x2",\
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// OBSOLETE "x3",\
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// OBSOLETE "x4",\
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// OBSOLETE "x5",\
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// OBSOLETE "x6",\
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// OBSOLETE "x7",\
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// OBSOLETE "x8",\
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// OBSOLETE "x9",\
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// OBSOLETE "x10",\
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// OBSOLETE "x11",\
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// OBSOLETE "x12",\
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// OBSOLETE "x13",\
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// OBSOLETE "x14",\
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// OBSOLETE "x15",\
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// OBSOLETE "x16",\
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// OBSOLETE "x17",\
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// OBSOLETE "x18",\
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// OBSOLETE "x19",\
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// OBSOLETE "x20",\
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// OBSOLETE "x21",\
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// OBSOLETE "x22",\
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// OBSOLETE "x23",\
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// OBSOLETE "x24",\
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// OBSOLETE "x25",\
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// OBSOLETE "x26",\
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// OBSOLETE "x27",\
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// OBSOLETE "x28",\
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// OBSOLETE "x29",\
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// OBSOLETE "x30",\
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// OBSOLETE "x31",\
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// OBSOLETE "vbr",\
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// OBSOLETE "dmt0",\
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// OBSOLETE "dmd0",\
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// OBSOLETE "dma0",\
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// OBSOLETE "dmt1",\
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// OBSOLETE "dmd1",\
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// OBSOLETE "dma1",\
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// OBSOLETE "dmt2",\
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// OBSOLETE "dmd2",\
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// OBSOLETE "dma2",\
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// OBSOLETE "sr0",\
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// OBSOLETE "sr1",\
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// OBSOLETE "sr2",\
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// OBSOLETE "sr3",\
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// OBSOLETE "fpecr",\
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// OBSOLETE "fphs1",\
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// OBSOLETE "fpls1",\
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// OBSOLETE "fphs2",\
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// OBSOLETE "fpls2",\
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// OBSOLETE "fppt",\
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// OBSOLETE "fprh",\
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// OBSOLETE "fprl",\
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// OBSOLETE "fpit",\
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// OBSOLETE "fpsr",\
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// OBSOLETE "fpcr",\
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// OBSOLETE }
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// OBSOLETE
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// OBSOLETE
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// OBSOLETE /* Register numbers of various important registers.
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// OBSOLETE Note that some of these values are "real" register numbers,
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// OBSOLETE and correspond to the general registers of the machine,
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// OBSOLETE and some are "phony" register numbers which are too large
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// OBSOLETE to be actual register numbers as far as the user is concerned
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// OBSOLETE but do serve to get the desired values when passed to read_register. */
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// OBSOLETE
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// OBSOLETE #define R0_REGNUM 0 /* Contains the constant zero */
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// OBSOLETE #define SRP_REGNUM 1 /* Contains subroutine return pointer */
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// OBSOLETE #define RV_REGNUM 2 /* Contains simple return values */
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// OBSOLETE #define SRA_REGNUM 12 /* Contains address of struct return values */
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// OBSOLETE #define SP_REGNUM 31 /* Contains address of top of stack */
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// OBSOLETE
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// OBSOLETE /* Instruction pointer notes...
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// OBSOLETE
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// OBSOLETE On the m88100:
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// OBSOLETE
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// OBSOLETE * cr04 = sxip. On exception, contains the excepting pc (probably).
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// OBSOLETE On rte, is ignored.
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// OBSOLETE
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// OBSOLETE * cr05 = snip. On exception, contains the NPC (next pc). On rte,
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// OBSOLETE pc is loaded from here.
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// OBSOLETE
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// OBSOLETE * cr06 = sfip. On exception, contains the NNPC (next next pc). On
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// OBSOLETE rte, the NPC is loaded from here.
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// OBSOLETE
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// OBSOLETE * lower two bits of each are flag bits. Bit 1 is V means address
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// OBSOLETE is valid. If address is not valid, bit 0 is ignored. Otherwise,
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// OBSOLETE bit 0 is E and asks for an exception to be taken if this
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// OBSOLETE instruction is executed.
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// OBSOLETE
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// OBSOLETE On the m88110:
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// OBSOLETE
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// OBSOLETE * cr04 = exip. On exception, contains the address of the excepting
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// OBSOLETE pc (always). On rte, pc is loaded from here. Bit 0, aka the D
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// OBSOLETE bit, is a flag saying that the offending instruction was in a
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// OBSOLETE branch delay slot. If set, then cr05 contains the NPC.
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// OBSOLETE
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// OBSOLETE * cr05 = enip. On exception, if the instruction pointed to by cr04
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// OBSOLETE was in a delay slot as indicated by the bit 0 of cr04, aka the D
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// OBSOLETE bit, the cr05 contains the NPC. Otherwise ignored.
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// OBSOLETE
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// OBSOLETE * cr06 is invalid */
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// OBSOLETE
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// OBSOLETE /* Note that the Harris Unix kernels emulate the m88100's behavior on
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// OBSOLETE the m88110. */
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// OBSOLETE
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// OBSOLETE #define SXIP_REGNUM 35 /* On m88100, Contains Shadow Execute
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// OBSOLETE Instruction Pointer. */
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// OBSOLETE #define SNIP_REGNUM 36 /* On m88100, Contains Shadow Next
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// OBSOLETE Instruction Pointer. */
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// OBSOLETE #define SFIP_REGNUM 37 /* On m88100, Contains Shadow Fetched
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// OBSOLETE Intruction pointer. */
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// OBSOLETE
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// OBSOLETE #define EXIP_REGNUM 35 /* On m88110, Contains Exception
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// OBSOLETE Executing Instruction Pointer. */
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// OBSOLETE #define ENIP_REGNUM 36 /* On m88110, Contains the Exception
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// OBSOLETE Next Instruction Pointer. */
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// OBSOLETE
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// OBSOLETE #define PC_REGNUM SXIP_REGNUM /* Program Counter */
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// OBSOLETE #define NPC_REGNUM SNIP_REGNUM /* Next Program Counter */
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// OBSOLETE #define M88K_NNPC_REGNUM SFIP_REGNUM /* Next Next Program Counter */
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// OBSOLETE
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// OBSOLETE
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// OBSOLETE #define PSR_REGNUM 32 /* Processor Status Register */
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// OBSOLETE #define FPSR_REGNUM 33 /* Floating Point Status Register */
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// OBSOLETE #define FPCR_REGNUM 34 /* Floating Point Control Register */
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// OBSOLETE #define XFP_REGNUM 38 /* First Extended Float Register */
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// OBSOLETE #define X0_REGNUM XFP_REGNUM /* Which also contains the constant zero */
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// OBSOLETE
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// OBSOLETE /* This is rather a confusing lie. Our m88k port using a stack pointer value
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// OBSOLETE for the frame address. Hence, the frame address and the frame pointer are
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// OBSOLETE only indirectly related. The value of this macro is the register number
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// OBSOLETE fetched by the machine "independent" portions of gdb when they want to know
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// OBSOLETE about a frame address. Thus, we lie here and claim that FP_REGNUM is
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// OBSOLETE SP_REGNUM. */
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// OBSOLETE #define FP_REGNUM SP_REGNUM /* Reg fetched to locate frame when pgm stops */
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// OBSOLETE #define ACTUAL_FP_REGNUM 30
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// OBSOLETE
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// OBSOLETE /* PSR status bit definitions. */
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// OBSOLETE
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// OBSOLETE #define PSR_MODE 0x80000000
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// OBSOLETE #define PSR_BYTE_ORDER 0x40000000
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// OBSOLETE #define PSR_SERIAL_MODE 0x20000000
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// OBSOLETE #define PSR_CARRY 0x10000000
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// OBSOLETE #define PSR_SFU_DISABLE 0x000003f0
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// OBSOLETE #define PSR_SFU1_DISABLE 0x00000008
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// OBSOLETE #define PSR_MXM 0x00000004
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// OBSOLETE #define PSR_IND 0x00000002
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// OBSOLETE #define PSR_SFRZ 0x00000001
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// OBSOLETE
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// OBSOLETE
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// OBSOLETE
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// OBSOLETE /* The following two comments come from the days prior to the m88110
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// OBSOLETE port. The m88110 handles the instruction pointers differently. I
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// OBSOLETE do not know what any m88110 kernels do as the m88110 port I'm
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// OBSOLETE working with is for an embedded system. rich@cygnus.com
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// OBSOLETE 13-sept-93. */
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// OBSOLETE
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// OBSOLETE /* BCS requires that the SXIP_REGNUM (or PC_REGNUM) contain the
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// OBSOLETE address of the next instr to be executed when a breakpoint occurs.
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// OBSOLETE Because the kernel gets the next instr (SNIP_REGNUM), the instr in
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// OBSOLETE SNIP needs to be put back into SFIP, and the instr in SXIP should
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// OBSOLETE be shifted to SNIP */
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// OBSOLETE
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// OBSOLETE /* Are you sitting down? It turns out that the 88K BCS (binary
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// OBSOLETE compatibility standard) folks originally felt that the debugger
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// OBSOLETE should be responsible for backing up the IPs, not the kernel (as is
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// OBSOLETE usually done). Well, they have reversed their decision, and in
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// OBSOLETE future releases our kernel will be handling the backing up of the
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// OBSOLETE IPs. So, eventually, we won't need to do the SHIFT_INST_REGS
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// OBSOLETE stuff. But, for now, since there are 88K systems out there that do
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// OBSOLETE need the debugger to do the IP shifting, and since there will be
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// OBSOLETE systems where the kernel does the shifting, the code is a little
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// OBSOLETE more complex than perhaps it needs to be (we still go inside
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// OBSOLETE SHIFT_INST_REGS, and if the shifting hasn't occurred then gdb goes
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// OBSOLETE ahead and shifts). */
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// OBSOLETE
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// OBSOLETE extern int target_is_m88110;
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// OBSOLETE #define SHIFT_INST_REGS() \
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// OBSOLETE if (!target_is_m88110) \
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// OBSOLETE { \
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// OBSOLETE CORE_ADDR pc = read_register (PC_REGNUM); \
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// OBSOLETE CORE_ADDR npc = read_register (NPC_REGNUM); \
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// OBSOLETE if (pc != npc) \
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// OBSOLETE { \
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// OBSOLETE write_register (M88K_NNPC_REGNUM, npc); \
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// OBSOLETE write_register (NPC_REGNUM, pc); \
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// OBSOLETE } \
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// OBSOLETE }
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// OBSOLETE
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// OBSOLETE /* Storing the following registers is a no-op. */
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// OBSOLETE #define CANNOT_STORE_REGISTER(regno) (((regno) == R0_REGNUM) \
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// OBSOLETE || ((regno) == X0_REGNUM))
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// OBSOLETE
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// OBSOLETE /* Number of bytes of storage in the actual machine representation
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// OBSOLETE for register N. On the m88k, the general purpose registers are 4
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// OBSOLETE bytes and the 88110 extended registers are 10 bytes. */
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// OBSOLETE
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// OBSOLETE #define REGISTER_RAW_SIZE(N) ((N) < XFP_REGNUM ? 4 : 10)
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// OBSOLETE
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// OBSOLETE /* Total amount of space needed to store our copies of the machine's
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// OBSOLETE register state, the array `registers'. */
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// OBSOLETE
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// OBSOLETE #define REGISTER_BYTES ((GP_REGS * REGISTER_RAW_SIZE(0)) \
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// OBSOLETE + (FP_REGS * REGISTER_RAW_SIZE(XFP_REGNUM)))
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// OBSOLETE
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// OBSOLETE /* Index within `registers' of the first byte of the space for
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// OBSOLETE register N. */
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// OBSOLETE
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// OBSOLETE #define REGISTER_BYTE(N) (((N) * REGISTER_RAW_SIZE(0)) \
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// OBSOLETE + ((N) >= XFP_REGNUM \
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// OBSOLETE ? (((N) - XFP_REGNUM) \
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// OBSOLETE * REGISTER_RAW_SIZE(XFP_REGNUM)) \
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// OBSOLETE : 0))
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// OBSOLETE
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// OBSOLETE /* Number of bytes of storage in the program's representation for
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// OBSOLETE register N. On the m88k, all registers are 4 bytes excepting the
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// OBSOLETE m88110 extended registers which are 8 byte doubles. */
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// OBSOLETE
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// OBSOLETE #define REGISTER_VIRTUAL_SIZE(N) ((N) < XFP_REGNUM ? 4 : 8)
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// OBSOLETE
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// OBSOLETE /* Largest value REGISTER_RAW_SIZE can have. */
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// OBSOLETE
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// OBSOLETE #define MAX_REGISTER_RAW_SIZE (REGISTER_RAW_SIZE(XFP_REGNUM))
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// OBSOLETE
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// OBSOLETE /* Largest value REGISTER_VIRTUAL_SIZE can have.
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// OBSOLETE Are FPS1, FPS2, FPR "virtual" regisers? */
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// OBSOLETE
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// OBSOLETE #define MAX_REGISTER_VIRTUAL_SIZE (REGISTER_RAW_SIZE(XFP_REGNUM))
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// OBSOLETE
|
||
// OBSOLETE /* Return the GDB type object for the "standard" data type
|
||
// OBSOLETE of data in register N. */
|
||
// OBSOLETE
|
||
// OBSOLETE struct type *m88k_register_type (int regnum);
|
||
// OBSOLETE #define REGISTER_VIRTUAL_TYPE(N) m88k_register_type (N)
|
||
// OBSOLETE
|
||
// OBSOLETE /* The 88k call/return conventions call for "small" values to be returned
|
||
// OBSOLETE into consecutive registers starting from r2. */
|
||
// OBSOLETE
|
||
// OBSOLETE #define DEPRECATED_EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \
|
||
// OBSOLETE memcpy ((VALBUF), &(((char *)REGBUF)[REGISTER_BYTE(RV_REGNUM)]), TYPE_LENGTH (TYPE))
|
||
// OBSOLETE
|
||
// OBSOLETE #define DEPRECATED_EXTRACT_STRUCT_VALUE_ADDRESS(REGBUF) (*(int *)(REGBUF))
|
||
// OBSOLETE
|
||
// OBSOLETE /* Write into appropriate registers a function return value
|
||
// OBSOLETE of type TYPE, given in virtual format. */
|
||
// OBSOLETE
|
||
// OBSOLETE #define STORE_RETURN_VALUE(TYPE,VALBUF) \
|
||
// OBSOLETE write_register_bytes (2*REGISTER_RAW_SIZE(0), (VALBUF), TYPE_LENGTH (TYPE))
|
||
// OBSOLETE
|
||
// OBSOLETE /* In COFF, if PCC says a parameter is a short or a char, do not
|
||
// OBSOLETE change it to int (it seems the convention is to change it). */
|
||
// OBSOLETE
|
||
// OBSOLETE #define BELIEVE_PCC_PROMOTION 1
|
||
// OBSOLETE
|
||
// OBSOLETE /* Describe the pointer in each stack frame to the previous stack frame
|
||
// OBSOLETE (its caller). */
|
||
// OBSOLETE
|
||
// OBSOLETE /* FRAME_CHAIN takes a frame's nominal address
|
||
// OBSOLETE and produces the frame's chain-pointer.
|
||
// OBSOLETE
|
||
// OBSOLETE However, if FRAME_CHAIN_VALID returns zero,
|
||
// OBSOLETE it means the given frame is the outermost one and has no caller. */
|
||
// OBSOLETE
|
||
// OBSOLETE extern CORE_ADDR frame_chain ();
|
||
// OBSOLETE extern int frame_chain_valid ();
|
||
// OBSOLETE extern int frameless_function_invocation ();
|
||
// OBSOLETE
|
||
// OBSOLETE #define FRAME_CHAIN(thisframe) \
|
||
// OBSOLETE frame_chain (thisframe)
|
||
// OBSOLETE
|
||
// OBSOLETE #define FRAMELESS_FUNCTION_INVOCATION(frame) \
|
||
// OBSOLETE (frameless_function_invocation (frame))
|
||
// OBSOLETE
|
||
// OBSOLETE /* Define other aspects of the stack frame. */
|
||
// OBSOLETE
|
||
// OBSOLETE #define FRAME_SAVED_PC(FRAME) \
|
||
// OBSOLETE frame_saved_pc (FRAME)
|
||
// OBSOLETE extern CORE_ADDR frame_saved_pc ();
|
||
// OBSOLETE
|
||
// OBSOLETE #define FRAME_ARGS_ADDRESS(fi) \
|
||
// OBSOLETE frame_args_address (fi)
|
||
// OBSOLETE extern CORE_ADDR frame_args_address ();
|
||
// OBSOLETE
|
||
// OBSOLETE #define FRAME_LOCALS_ADDRESS(fi) \
|
||
// OBSOLETE frame_locals_address (fi)
|
||
// OBSOLETE extern CORE_ADDR frame_locals_address ();
|
||
// OBSOLETE
|
||
// OBSOLETE /* Return number of args passed to a frame.
|
||
// OBSOLETE Can return -1, meaning no way to tell. */
|
||
// OBSOLETE
|
||
// OBSOLETE #define FRAME_NUM_ARGS(fi) (-1)
|
||
// OBSOLETE
|
||
// OBSOLETE /* Return number of bytes at start of arglist that are not really args. */
|
||
// OBSOLETE
|
||
// OBSOLETE #define FRAME_ARGS_SKIP 0
|
||
// OBSOLETE
|
||
// OBSOLETE /* Put here the code to store, into a struct frame_saved_regs,
|
||
// OBSOLETE the addresses of the saved registers of frame described by FRAME_INFO.
|
||
// OBSOLETE This includes special registers such as pc and fp saved in special
|
||
// OBSOLETE ways in the stack frame. sp is even more special:
|
||
// OBSOLETE the address we return for it IS the sp for the next frame. */
|
||
// OBSOLETE
|
||
// OBSOLETE /* On the 88k, parameter registers get stored into the so called "homing"
|
||
// OBSOLETE area. This *always* happens when you compiled with GCC and use -g.
|
||
// OBSOLETE Also, (with GCC and -g) the saving of the parameter register values
|
||
// OBSOLETE always happens right within the function prologue code, so these register
|
||
// OBSOLETE values can generally be relied upon to be already copied into their
|
||
// OBSOLETE respective homing slots by the time you will normally try to look at
|
||
// OBSOLETE them (we hope).
|
||
// OBSOLETE
|
||
// OBSOLETE Note that homing area stack slots are always at *positive* offsets from
|
||
// OBSOLETE the frame pointer. Thus, the homing area stack slots for the parameter
|
||
// OBSOLETE registers (passed values) for a given function are actually part of the
|
||
// OBSOLETE frame area of the caller. This is unusual, but it should not present
|
||
// OBSOLETE any special problems for GDB.
|
||
// OBSOLETE
|
||
// OBSOLETE Note also that on the 88k, we are only interested in finding the
|
||
// OBSOLETE registers that might have been saved in memory. This is a subset of
|
||
// OBSOLETE the whole set of registers because the standard calling sequence allows
|
||
// OBSOLETE the called routine to clobber many registers.
|
||
// OBSOLETE
|
||
// OBSOLETE We could manage to locate values for all of the so called "preserved"
|
||
// OBSOLETE registers (some of which may get saved within any particular frame) but
|
||
// OBSOLETE that would require decoding all of the tdesc information. That would be
|
||
// OBSOLETE nice information for GDB to have, but it is not strictly manditory if we
|
||
// OBSOLETE can live without the ability to look at values within (or backup to)
|
||
// OBSOLETE previous frames.
|
||
// OBSOLETE */
|
||
// OBSOLETE
|
||
// OBSOLETE struct frame_saved_regs;
|
||
// OBSOLETE struct frame_info;
|
||
// OBSOLETE
|
||
// OBSOLETE void frame_find_saved_regs (struct frame_info *fi,
|
||
// OBSOLETE struct frame_saved_regs *fsr);
|
||
// OBSOLETE
|
||
// OBSOLETE #define FRAME_FIND_SAVED_REGS(frame_info, frame_saved_regs) \
|
||
// OBSOLETE frame_find_saved_regs (frame_info, &frame_saved_regs)
|
||
// OBSOLETE
|
||
// OBSOLETE
|
||
// OBSOLETE #define POP_FRAME pop_frame ()
|
||
// OBSOLETE extern void pop_frame ();
|
||
// OBSOLETE
|
||
// OBSOLETE /* Call function stuff contributed by Kevin Buettner of Motorola. */
|
||
// OBSOLETE
|
||
// OBSOLETE #define CALL_DUMMY_LOCATION AFTER_TEXT_END
|
||
// OBSOLETE
|
||
// OBSOLETE extern void m88k_push_dummy_frame ();
|
||
// OBSOLETE #define PUSH_DUMMY_FRAME m88k_push_dummy_frame()
|
||
// OBSOLETE
|
||
// OBSOLETE #define CALL_DUMMY { \
|
||
// OBSOLETE 0x67ff00c0, /* 0: subu #sp,#sp,0xc0 */ \
|
||
// OBSOLETE 0x243f0004, /* 4: st #r1,#sp,0x4 */ \
|
||
// OBSOLETE 0x245f0008, /* 8: st #r2,#sp,0x8 */ \
|
||
// OBSOLETE 0x247f000c, /* c: st #r3,#sp,0xc */ \
|
||
// OBSOLETE 0x249f0010, /* 10: st #r4,#sp,0x10 */ \
|
||
// OBSOLETE 0x24bf0014, /* 14: st #r5,#sp,0x14 */ \
|
||
// OBSOLETE 0x24df0018, /* 18: st #r6,#sp,0x18 */ \
|
||
// OBSOLETE 0x24ff001c, /* 1c: st #r7,#sp,0x1c */ \
|
||
// OBSOLETE 0x251f0020, /* 20: st #r8,#sp,0x20 */ \
|
||
// OBSOLETE 0x253f0024, /* 24: st #r9,#sp,0x24 */ \
|
||
// OBSOLETE 0x255f0028, /* 28: st #r10,#sp,0x28 */ \
|
||
// OBSOLETE 0x257f002c, /* 2c: st #r11,#sp,0x2c */ \
|
||
// OBSOLETE 0x259f0030, /* 30: st #r12,#sp,0x30 */ \
|
||
// OBSOLETE 0x25bf0034, /* 34: st #r13,#sp,0x34 */ \
|
||
// OBSOLETE 0x25df0038, /* 38: st #r14,#sp,0x38 */ \
|
||
// OBSOLETE 0x25ff003c, /* 3c: st #r15,#sp,0x3c */ \
|
||
// OBSOLETE 0x261f0040, /* 40: st #r16,#sp,0x40 */ \
|
||
// OBSOLETE 0x263f0044, /* 44: st #r17,#sp,0x44 */ \
|
||
// OBSOLETE 0x265f0048, /* 48: st #r18,#sp,0x48 */ \
|
||
// OBSOLETE 0x267f004c, /* 4c: st #r19,#sp,0x4c */ \
|
||
// OBSOLETE 0x269f0050, /* 50: st #r20,#sp,0x50 */ \
|
||
// OBSOLETE 0x26bf0054, /* 54: st #r21,#sp,0x54 */ \
|
||
// OBSOLETE 0x26df0058, /* 58: st #r22,#sp,0x58 */ \
|
||
// OBSOLETE 0x26ff005c, /* 5c: st #r23,#sp,0x5c */ \
|
||
// OBSOLETE 0x271f0060, /* 60: st #r24,#sp,0x60 */ \
|
||
// OBSOLETE 0x273f0064, /* 64: st #r25,#sp,0x64 */ \
|
||
// OBSOLETE 0x275f0068, /* 68: st #r26,#sp,0x68 */ \
|
||
// OBSOLETE 0x277f006c, /* 6c: st #r27,#sp,0x6c */ \
|
||
// OBSOLETE 0x279f0070, /* 70: st #r28,#sp,0x70 */ \
|
||
// OBSOLETE 0x27bf0074, /* 74: st #r29,#sp,0x74 */ \
|
||
// OBSOLETE 0x27df0078, /* 78: st #r30,#sp,0x78 */ \
|
||
// OBSOLETE 0x63df0000, /* 7c: addu #r30,#sp,0x0 */ \
|
||
// OBSOLETE 0x145f0000, /* 80: ld #r2,#sp,0x0 */ \
|
||
// OBSOLETE 0x147f0004, /* 84: ld #r3,#sp,0x4 */ \
|
||
// OBSOLETE 0x149f0008, /* 88: ld #r4,#sp,0x8 */ \
|
||
// OBSOLETE 0x14bf000c, /* 8c: ld #r5,#sp,0xc */ \
|
||
// OBSOLETE 0x14df0010, /* 90: ld #r6,#sp,0x10 */ \
|
||
// OBSOLETE 0x14ff0014, /* 94: ld #r7,#sp,0x14 */ \
|
||
// OBSOLETE 0x151f0018, /* 98: ld #r8,#sp,0x18 */ \
|
||
// OBSOLETE 0x153f001c, /* 9c: ld #r9,#sp,0x1c */ \
|
||
// OBSOLETE 0x5c200000, /* a0: or.u #r1,#r0,0x0 */ \
|
||
// OBSOLETE 0x58210000, /* a4: or #r1,#r1,0x0 */ \
|
||
// OBSOLETE 0xf400c801, /* a8: jsr #r1 */ \
|
||
// OBSOLETE 0xf000d1ff /* ac: tb0 0x0,#r0,0x1ff */ \
|
||
// OBSOLETE }
|
||
// OBSOLETE
|
||
// OBSOLETE #define CALL_DUMMY_START_OFFSET 0x80
|
||
// OBSOLETE #define CALL_DUMMY_LENGTH 0xb0
|
||
// OBSOLETE
|
||
// OBSOLETE /* FIXME: byteswapping. */
|
||
// OBSOLETE #define FIX_CALL_DUMMY(dummy, pc, fun, nargs, args, type, gcc_p) \
|
||
// OBSOLETE { \
|
||
// OBSOLETE *(unsigned long *)((char *) (dummy) + 0xa0) |= \
|
||
// OBSOLETE (((unsigned long) (fun)) >> 16); \
|
||
// OBSOLETE *(unsigned long *)((char *) (dummy) + 0xa4) |= \
|
||
// OBSOLETE (((unsigned long) (fun)) & 0xffff); \
|
||
// OBSOLETE }
|
||
// OBSOLETE
|
||
// OBSOLETE /* Stack must be aligned on 64-bit boundaries when synthesizing
|
||
// OBSOLETE function calls. */
|
||
// OBSOLETE
|
||
// OBSOLETE #define STACK_ALIGN(addr) (((addr) + 7) & -8)
|
||
// OBSOLETE
|
||
// OBSOLETE #define STORE_STRUCT_RETURN(addr, sp) \
|
||
// OBSOLETE write_register (SRA_REGNUM, (addr))
|
||
// OBSOLETE
|
||
// OBSOLETE #define NEED_TEXT_START_END 1
|
||
// OBSOLETE
|
||
// OBSOLETE /* According to the MC88100 RISC Microprocessor User's Manual, section
|
||
// OBSOLETE 6.4.3.1.2:
|
||
// OBSOLETE
|
||
// OBSOLETE ... can be made to return to a particular instruction by placing a
|
||
// OBSOLETE valid instruction address in the SNIP and the next sequential
|
||
// OBSOLETE instruction address in the SFIP (with V bits set and E bits clear).
|
||
// OBSOLETE The rte resumes execution at the instruction pointed to by the
|
||
// OBSOLETE SNIP, then the SFIP.
|
||
// OBSOLETE
|
||
// OBSOLETE The E bit is the least significant bit (bit 0). The V (valid) bit is
|
||
// OBSOLETE bit 1. This is why we logical or 2 into the values we are writing
|
||
// OBSOLETE below. It turns out that SXIP plays no role when returning from an
|
||
// OBSOLETE exception so nothing special has to be done with it. We could even
|
||
// OBSOLETE (presumably) give it a totally bogus value.
|
||
// OBSOLETE
|
||
// OBSOLETE -- Kevin Buettner
|
||
// OBSOLETE */
|
||
// OBSOLETE
|
||
// OBSOLETE extern void m88k_target_write_pc (CORE_ADDR pc, ptid_t ptid);
|
||
// OBSOLETE #define TARGET_WRITE_PC(VAL, PID) m88k_target_write_pc (VAL, PID)
|