33c65ba3b3
set endianness based on machine type. (_initialize_sparc_tdep): Initialize target_architecture_hook. (sparc_print_register_hook): Print PSR and FPSR in fancy format on 32-bit machines. * config/sparc/tm-sparc.h (PRINT_REGISTER_HOOK): Redefine to call sparc_print_register_hook instead of using inline code. * config/sparc/tm-sp64.h (PRINT_REGISTER_HOOK): Remove.
587 lines
22 KiB
C
587 lines
22 KiB
C
/* Target machine sub-parameters for SPARC, for GDB, the GNU debugger.
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This is included by other tm-*.h files to define SPARC cpu-related info.
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Copyright 1986, 1987, 1989, 1991, 1992, 1993, 1994
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Free Software Foundation, Inc.
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Contributed by Michael Tiemann (tiemann@mcc.com)
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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#ifdef __STDC__
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struct frame_info;
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struct type;
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struct value;
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#endif
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#define TARGET_BYTE_ORDER BIG_ENDIAN
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/* Floating point is IEEE compatible. */
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#define IEEE_FLOAT
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/* If an argument is declared "register", Sun cc will keep it in a register,
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never saving it onto the stack. So we better not believe the "p" symbol
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descriptor stab. */
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#define USE_REGISTER_NOT_ARG
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/* When passing a structure to a function, Sun cc passes the address
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not the structure itself. It (under SunOS4) creates two symbols,
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which we need to combine to a LOC_REGPARM. Gcc version two (as of
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1.92) behaves like sun cc. REG_STRUCT_HAS_ADDR is smart enough to
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distinguish between Sun cc, gcc version 1 and gcc version 2. */
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#define REG_STRUCT_HAS_ADDR(gcc_p,type) (gcc_p != 1)
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/* Sun /bin/cc gets this right as of SunOS 4.1.x. We need to define
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BELIEVE_PCC_PROMOTION to get this right now that the code which
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detects gcc2_compiled. is broken. This loses for SunOS 4.0.x and
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earlier. */
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#define BELIEVE_PCC_PROMOTION 1
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/* For acc, there's no need to correct LBRAC entries by guessing how
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they should work. In fact, this is harmful because the LBRAC
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entries now all appear at the end of the function, not intermixed
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with the SLINE entries. n_opt_found detects acc for Solaris binaries;
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function_stab_type detects acc for SunOS4 binaries.
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For binary from SunOS4 /bin/cc, need to correct LBRAC's.
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For gcc, like acc, don't correct. */
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#define SUN_FIXED_LBRAC_BUG \
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(n_opt_found \
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|| function_stab_type == N_STSYM \
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|| function_stab_type == N_GSYM \
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|| processing_gcc_compilation)
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/* Do variables in the debug stabs occur after the N_LBRAC or before it?
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acc: after, gcc: before, SunOS4 /bin/cc: before. */
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#define VARIABLES_INSIDE_BLOCK(desc, gcc_p) \
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(!(gcc_p) \
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&& (n_opt_found \
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|| function_stab_type == N_STSYM \
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|| function_stab_type == N_GSYM))
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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. SKIP_PROLOGUE_FRAMELESS_P advances
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the PC past some of the prologue, but stops as soon as it
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knows that the function has a frame. Its result is equal
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to its input PC if the function is frameless, unequal otherwise. */
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#define SKIP_PROLOGUE(pc) \
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{ pc = skip_prologue (pc, 0); }
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#define SKIP_PROLOGUE_FRAMELESS_P(pc) \
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{ pc = skip_prologue (pc, 1); }
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extern CORE_ADDR skip_prologue PARAMS ((CORE_ADDR, int));
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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) sparc_pc_adjust(pc)
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extern CORE_ADDR sparc_pc_adjust PARAMS ((CORE_ADDR));
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#define SAVED_PC_AFTER_CALL(frame) PC_ADJUST (read_register (RP_REGNUM))
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/* Stack grows downward. */
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#define INNER_THAN <
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/* Stack must be aligned on 64-bit boundaries when synthesizing
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function calls. */
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#define STACK_ALIGN(ADDR) (((ADDR) + 7) & -8)
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/* Sequence of bytes for breakpoint instruction (ta 1). */
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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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v9 does not have such critters though. */
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#define ABOUT_TO_RETURN(pc) \
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((read_memory_integer (pc, 4)|0x00040000) == 0x81c7e008)
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/* Say how long (ordinary) registers are. This is a piece of bogosity
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used in push_word and a few other places; REGISTER_RAW_SIZE is the
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real way to know how big a register is. */
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#define REGISTER_SIZE 4
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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 G0_REGNUM 0 /* %g0 */
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#define G1_REGNUM 1 /* %g1 */
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#define O0_REGNUM 8 /* %o0 */
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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 RP_REGNUM 15 /* Contains return address value, *before* \
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any windows get switched. */
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#define O7_REGNUM 15 /* Last local reg not saved on stack frame */
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#define L0_REGNUM 16 /* First local reg that's saved on stack frame
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rather than in machine registers */
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#define I0_REGNUM 24 /* %i0 */
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#define FP_REGNUM 30 /* Contains address of executing stack frame */
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#define I7_REGNUM 31 /* Last local reg saved on stack frame */
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#define FP0_REGNUM 32 /* Floating point register 0 */
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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 PS_FLAG_CARRY 0x100000 /* Carry bit in PS */
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#define WIM_REGNUM 66 /* Window Invalid Mask (not really supported) */
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#define TBR_REGNUM 67 /* Trap Base Register (not really supported) */
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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 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'. On the sparc, `registers'
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contains the ins and locals, even though they are saved on the
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stack rather than with the other registers, and this causes hair
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and confusion in places like pop_frame. It might be
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better to remove the ins and locals from `registers', make sure
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that get_saved_register can get them from the stack (even in the
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innermost frame), and make this the way to access them. For the
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frame pointer we would do that via TARGET_READ_FP. On the other hand,
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that is likely to be confusing or worse for flat frames. */
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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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/* We need to override GET_SAVED_REGISTER so that we can deal with the way
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outs change into ins in different frames. HAVE_REGISTER_WINDOWS can't
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deal with this case and also handle flat frames at the same time. */
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#define GET_SAVED_REGISTER 1
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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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/* 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 : \
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builtin_type_int)
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/* Writing to %g0 is a noop (not an error or exception or anything like
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that, however). */
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#define CANNOT_STORE_REGISTER(regno) ((regno) == G0_REGNUM)
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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_by_hand.
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The ultimate mystery is, tho, what is the value "16"? */
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#define STORE_STRUCT_RETURN(ADDR, SP) \
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{ char val[4]; \
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store_unsigned_integer (val, 4, (ADDR)); \
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write_memory ((SP)+(16*4), val, 4); }
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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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sparc_extract_return_value(TYPE, REGBUF, VALBUF)
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extern void
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sparc_extract_return_value PARAMS ((struct type *, char [], char *));
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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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#define STORE_RETURN_VALUE(TYPE,VALBUF) \
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sparc_store_return_value(TYPE, VALBUF)
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extern void sparc_store_return_value PARAMS ((struct type *, char *));
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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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(sparc_extract_struct_value_address (REGBUF))
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extern CORE_ADDR
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sparc_extract_struct_value_address PARAMS ((char [REGISTER_BYTES]));
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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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/* FRAME_CHAIN takes a frame's nominal address
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and produces the frame's chain-pointer. */
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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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If we are setting up an arbitrary frame, we'll need to know where
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it ends. Hence the following. This part of the frame cache
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structure should be checked before it is assumed that this frame's
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bottom is in the stack pointer.
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If there isn't a frame below this one, the bottom of this frame is
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in the stack pointer.
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If there is a frame below this one, and the frame pointers are
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identical, it's a leaf frame and the bottoms are the same also.
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Otherwise the bottom of this frame is the top of the next frame.
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The bottom field is misnamed, since it might imply that memory from
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bottom to frame contains this frame. That need not be true if
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stack frames are allocated in different segments (e.g. some on a
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stack, some on a heap in the data segment).
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GCC 2.6 and later can generate ``flat register window'' code that
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makes frames by explicitly saving those registers that need to be
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saved. %i7 is used as the frame pointer, and the frame is laid out so
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that flat and non-flat calls can be intermixed freely within a
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program. Unfortunately for GDB, this means it must detect and record
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the flatness of frames.
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Since the prologue in a flat frame also tells us where fp and pc
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have been stashed (the frame is of variable size, so their location
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is not fixed), it's convenient to record them in the frame info. */
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#define EXTRA_FRAME_INFO \
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CORE_ADDR bottom; \
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int flat; \
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/* Following fields only relevant for flat frames. */ \
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CORE_ADDR pc_addr; \
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CORE_ADDR fp_addr; \
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/* Add this to ->frame to get the value of the stack pointer at the */ \
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/* time of the register saves. */ \
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int sp_offset;
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#define INIT_EXTRA_FRAME_INFO(fromleaf, fci) \
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sparc_init_extra_frame_info (fromleaf, fci)
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extern void sparc_init_extra_frame_info PARAMS((int, struct frame_info *));
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#define PRINT_EXTRA_FRAME_INFO(fi) \
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{ \
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if ((fi) && (fi)->flat) \
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printf_filtered (" flat, pc saved at 0x%x, fp saved at 0x%x\n", \
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(fi)->pc_addr, (fi)->fp_addr); \
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}
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#define FRAME_CHAIN(thisframe) (sparc_frame_chain (thisframe))
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extern CORE_ADDR sparc_frame_chain PARAMS ((struct frame_info *));
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/* INIT_EXTRA_FRAME_INFO needs the PC to detect flat frames. */
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#define INIT_FRAME_PC(fromleaf, prev) /* nothing */
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#define INIT_FRAME_PC_FIRST(fromleaf, prev) \
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(prev)->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 other aspects of the stack frame. */
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/* A macro that tells us whether the function invocation represented
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by FI does not have a frame on the stack associated with it. If it
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does not, FRAMELESS is set to 1, else 0. */
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#define FRAMELESS_FUNCTION_INVOCATION(FI, FRAMELESS) \
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(FRAMELESS) = frameless_look_for_prologue(FI)
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/* The location of I0 w.r.t SP. This is actually dependent on how the system's
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window overflow/underflow routines are written. Most vendors save the L regs
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followed by the I regs (at the higher address). Some vendors get it wrong.
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*/
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#define FRAME_SAVED_L0 0
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#define FRAME_SAVED_I0 (8 * REGISTER_RAW_SIZE (L0_REGNUM))
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/* Where is the PC for a specific frame */
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#define FRAME_SAVED_PC(FRAME) sparc_frame_saved_pc (FRAME)
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extern CORE_ADDR sparc_frame_saved_pc PARAMS ((struct frame_info *));
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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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/* Things needed for making the inferior call functions. */
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/*
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* First of all, let me give my opinion of what the DUMMY_FRAME
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* actually looks like.
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*
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* | |
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* | |
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* + - - - - - - - - - - - - - - - - +<-- fp (level 0)
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* | |
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* | |
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* | |
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* | |
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* | Frame of innermost program |
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* | function |
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* | |
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* | |
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* | |
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* | |
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* | |
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* |---------------------------------|<-- sp (level 0), fp (c)
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* | |
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* DUMMY | fp0-31 |
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* | |
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* | ------ |<-- fp - 0x80
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* FRAME | g0-7 |<-- fp - 0xa0
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* | i0-7 |<-- fp - 0xc0
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* | other |<-- fp - 0xe0
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* | ? |
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* | ? |
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* |---------------------------------|<-- sp' = fp - 0x140
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* | |
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* xcution start | |
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* sp' + 0x94 -->| CALL_DUMMY (x code) |
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* | |
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* | |
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* |---------------------------------|<-- sp'' = fp - 0x200
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* | align sp to 8 byte boundary |
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* | ==> args to fn <== |
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* Room for | |
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* i & l's + agg | CALL_DUMMY_STACK_ADJUST = 0x0x44|
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* |---------------------------------|<-- final sp (variable)
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* | |
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* | Where function called will |
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* | build frame. |
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* | |
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* | |
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*
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* I understand everything in this picture except what the space
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* between fp - 0xe0 and fp - 0x140 is used for. Oh, and I don't
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* understand why there's a large chunk of CALL_DUMMY that never gets
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* executed (its function is superceeded by PUSH_DUMMY_FRAME; they
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* are designed to do the same thing).
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*
|
||
* PUSH_DUMMY_FRAME saves the registers above sp' and pushes the
|
||
* register file stack down one.
|
||
*
|
||
* call_function then writes CALL_DUMMY, pushes the args onto the
|
||
* stack, and adjusts the stack pointer.
|
||
*
|
||
* run_stack_dummy then starts execution (in the middle of
|
||
* CALL_DUMMY, as directed by call_function).
|
||
*/
|
||
|
||
/* Push an empty stack frame, to record the current PC, etc. */
|
||
|
||
#define PUSH_DUMMY_FRAME sparc_push_dummy_frame ()
|
||
#define POP_FRAME sparc_pop_frame ()
|
||
|
||
void sparc_push_dummy_frame PARAMS ((void)), sparc_pop_frame PARAMS ((void));
|
||
|
||
#ifndef CALL_DUMMY
|
||
/* This sequence of words is the instructions
|
||
|
||
0: mov %g1, %fp
|
||
4: save %sp, %g0, %sp
|
||
8: mov %g2, %fp
|
||
12: mov %g3, %i7
|
||
16: ld [%sp+0x58],%o5
|
||
20: ld [%sp+0x54],%o4
|
||
24: ld [%sp+0x50],%o3
|
||
28: ld [%sp+0x4c],%o2
|
||
32: ld [%sp+0x48],%o1
|
||
36: call 0x00000000
|
||
40: ld [%sp+0x44],%o0
|
||
44: nop
|
||
48: ta 1
|
||
52: nop
|
||
|
||
NOTES:
|
||
* the first four instructions are necessary only on the simulator.
|
||
* this is a multiple of 8 (not only 4) bytes.
|
||
* the `call' insn is a relative, not an absolute call.
|
||
* the `nop' at the end is needed to keep the trap from
|
||
clobbering things (if NPC pointed to garbage instead).
|
||
*/
|
||
|
||
#define CALL_DUMMY { 0xbc100001, 0x9de38000, 0xbc100002, 0xbe100003, \
|
||
0xda03a058, 0xd803a054, 0xd603a050, 0xd403a04c, \
|
||
0xd203a048, 0x40000000, 0xd003a044, 0x01000000, \
|
||
0x91d02001, 0x01000000 }
|
||
|
||
|
||
/* Size of the call dummy in bytes. */
|
||
|
||
#define CALL_DUMMY_LENGTH 56
|
||
|
||
/* Offset within call dummy of first instruction to execute. */
|
||
|
||
#define CALL_DUMMY_START_OFFSET 0
|
||
|
||
/* Offset within CALL_DUMMY of the 'call' instruction. */
|
||
|
||
#define CALL_DUMMY_CALL_OFFSET (CALL_DUMMY_START_OFFSET + 36)
|
||
|
||
/* Offset within CALL_DUMMY of the 'ta 1' instruction. */
|
||
|
||
#define CALL_DUMMY_BREAKPOINT_OFFSET (CALL_DUMMY_START_OFFSET + 48)
|
||
|
||
#define CALL_DUMMY_STACK_ADJUST 68
|
||
|
||
#endif
|
||
/* 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, args, type, gcc_p) \
|
||
sparc_fix_call_dummy (dummyname, pc, fun, type, gcc_p)
|
||
void sparc_fix_call_dummy PARAMS ((char *dummy, CORE_ADDR pc, CORE_ADDR fun,
|
||
struct type *value_type, int using_gcc));
|
||
|
||
/* The Sparc returns long doubles on the stack. */
|
||
|
||
#define RETURN_VALUE_ON_STACK(TYPE) \
|
||
(TYPE_CODE(TYPE) == TYPE_CODE_FLT \
|
||
&& TYPE_LENGTH(TYPE) > 8)
|
||
|
||
/* Sparc has no reliable single step ptrace call */
|
||
|
||
#define NO_SINGLE_STEP 1
|
||
|
||
/* We need more arguments in a frame specification for the
|
||
"frame" or "info frame" command. */
|
||
|
||
#define SETUP_ARBITRARY_FRAME(argc, argv) setup_arbitrary_frame (argc, argv)
|
||
extern struct frame_info *setup_arbitrary_frame PARAMS ((int, CORE_ADDR *));
|
||
|
||
/* To print every pair of float registers as a double, we use this hook.
|
||
We also print the condition code registers in a readable format
|
||
(FIXME: can expand this to all control regs). */
|
||
|
||
#undef PRINT_REGISTER_HOOK
|
||
#define PRINT_REGISTER_HOOK(regno) \
|
||
sparc_print_register_hook (regno)
|
||
extern void sparc_print_register_hook PARAMS ((int regno));
|
||
|
||
|
||
/* Optimization for storing registers to the inferior. The hook
|
||
DO_DEFERRED_STORES
|
||
actually executes any deferred stores. It is called any time
|
||
we are going to proceed the child, or read its registers.
|
||
The hook CLEAR_DEFERRED_STORES is called when we want to throw
|
||
away the inferior process, e.g. when it dies or we kill it.
|
||
FIXME, this does not handle remote debugging cleanly. */
|
||
|
||
extern int deferred_stores;
|
||
#define DO_DEFERRED_STORES \
|
||
if (deferred_stores) \
|
||
target_store_registers (-2);
|
||
#define CLEAR_DEFERRED_STORES \
|
||
deferred_stores = 0;
|
||
|
||
/* If the current gcc for for this target does not produce correct debugging
|
||
information for float parameters, both prototyped and unprototyped, then
|
||
define this macro. This forces gdb to always assume that floats are
|
||
passed as doubles and then converted in the callee. */
|
||
|
||
#define COERCE_FLOAT_TO_DOUBLE 1
|
||
|
||
/* Select the sparc disassembler */
|
||
|
||
#define TM_PRINT_INSN_MACH bfd_mach_sparc
|
||
|
||
/* Arguments smaller than an int must promoted to ints when synthesizing
|
||
function calls. */
|
||
|
||
#define PUSH_ARGUMENTS(nargs, args, sp, struct_return, struct_addr) \
|
||
sp = sparc_push_arguments((nargs), (args), (sp), (struct_return), (struct_addr))
|
||
extern CORE_ADDR
|
||
sparc_push_arguments PARAMS ((int, struct value **, CORE_ADDR, int, CORE_ADDR));
|