87647bb0c7
* sparc-tdep.c (sparc_print_register_hook): Make static. (sparc_print_registers_info): New function. (sparc_do_registers_info): New function. (sparclet_print_registers_info): New function. (sparclet_do_registers_info): New function. (do_sparc_print_registers_info): New function. (sparc_print_registers): New static function, clone of infcmd.c's default_print_registers_info. * config/sparc/tm-sparclet.h (PRINT_REGISTER_HOOK): Delete macro. (sparclet_do_registers_info): Declare. (DEPRECATED_DO_REGISTERS_INFO): Re-define. * config/sparc/tm-sparc.h (DEPRECATED_DO_REGISTERS_INFO): Re-define. (sparc_do_registers_info): Declare. (PRINT_REGISTER_HOOK): Delete macro. (sparc_print_register_hook): Delete declaration.
761 lines
27 KiB
C
761 lines
27 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, 1995, 1996, 1997,
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1998, 1999, 2000
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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,
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Boston, MA 02111-1307, USA. */
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#include "regcache.h"
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struct type;
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struct value;
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struct frame_info;
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/*
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* The following enums are purely for the convenience of the GDB
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* developer, when debugging GDB.
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*/
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enum { /* Sparc general registers, for all sparc versions. */
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G0_REGNUM, G1_REGNUM, G2_REGNUM, G3_REGNUM,
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G4_REGNUM, G5_REGNUM, G6_REGNUM, G7_REGNUM,
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O0_REGNUM, O1_REGNUM, O2_REGNUM, O3_REGNUM,
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O4_REGNUM, O5_REGNUM, O6_REGNUM, O7_REGNUM,
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L0_REGNUM, L1_REGNUM, L2_REGNUM, L3_REGNUM,
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L4_REGNUM, L5_REGNUM, L6_REGNUM, L7_REGNUM,
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I0_REGNUM, I1_REGNUM, I2_REGNUM, I3_REGNUM,
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I4_REGNUM, I5_REGNUM, I6_REGNUM, I7_REGNUM,
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FP0_REGNUM /* Floating point register 0 */
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};
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enum { /* Sparc general registers, alternate names. */
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R0_REGNUM, R1_REGNUM, R2_REGNUM, R3_REGNUM,
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R4_REGNUM, R5_REGNUM, R6_REGNUM, R7_REGNUM,
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R8_REGNUM, R9_REGNUM, R10_REGNUM, R11_REGNUM,
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R12_REGNUM, R13_REGNUM, R14_REGNUM, R15_REGNUM,
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R16_REGNUM, R17_REGNUM, R18_REGNUM, R19_REGNUM,
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R20_REGNUM, R21_REGNUM, R22_REGNUM, R23_REGNUM,
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R24_REGNUM, R25_REGNUM, R26_REGNUM, R27_REGNUM,
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R28_REGNUM, R29_REGNUM, R30_REGNUM, R31_REGNUM
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};
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enum { /* Sparc32 control registers. */
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PS_REGNUM = 65, /* PC, NPC, and Y are omitted because */
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WIM_REGNUM = 66, /* they have different values depending on */
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TBR_REGNUM = 67, /* 32-bit / 64-bit mode. */
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FPS_REGNUM = 70,
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CPS_REGNUM = 71
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};
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/* v9 misc. and priv. regs */
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/* Note: specifying values explicitly for documentation purposes. */
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enum { /* Sparc64 control registers, excluding Y, PC, and NPC. */
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CCR_REGNUM = 82, /* Condition Code Register (%xcc,%icc) */
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FSR_REGNUM = 83, /* Floating Point State */
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FPRS_REGNUM = 84, /* Floating Point Registers State */
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ASI_REGNUM = 86, /* Alternate Space Identifier */
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VER_REGNUM = 87, /* Version register */
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TICK_REGNUM = 88, /* Tick register */
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PIL_REGNUM = 89, /* Processor Interrupt Level */
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PSTATE_REGNUM = 90, /* Processor State */
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TSTATE_REGNUM = 91, /* Trap State */
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TBA_REGNUM = 92, /* Trap Base Address */
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TL_REGNUM = 93, /* Trap Level */
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TT_REGNUM = 94, /* Trap Type */
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TPC_REGNUM = 95, /* Trap pc */
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TNPC_REGNUM = 96, /* Trap npc */
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WSTATE_REGNUM = 97, /* Window State */
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CWP_REGNUM = 98, /* Current Window Pointer */
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CANSAVE_REGNUM = 99, /* Savable Windows */
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CANRESTORE_REGNUM = 100, /* Restorable Windows */
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CLEANWIN_REGNUM = 101, /* Clean Windows */
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OTHERWIN_REGNUM = 102, /* Other Windows */
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ASR16_REGNUM = 103, /* Ancillary State Registers */
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ASR17_REGNUM = 104,
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ASR18_REGNUM = 105,
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ASR19_REGNUM = 106,
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ASR20_REGNUM = 107,
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ASR21_REGNUM = 108,
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ASR22_REGNUM = 109,
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ASR23_REGNUM = 110,
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ASR24_REGNUM = 111,
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ASR25_REGNUM = 112,
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ASR26_REGNUM = 113,
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ASR27_REGNUM = 114,
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ASR28_REGNUM = 115,
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ASR29_REGNUM = 116,
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ASR30_REGNUM = 117,
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ASR31_REGNUM = 118,
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ICC_REGNUM = 119, /* 32 bit condition codes */
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XCC_REGNUM = 120, /* 64 bit condition codes */
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FCC0_REGNUM = 121, /* fp cc reg 0 */
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FCC1_REGNUM = 122, /* fp cc reg 1 */
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FCC2_REGNUM = 123, /* fp cc reg 2 */
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FCC3_REGNUM = 124 /* fp cc reg 3 */
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};
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/*
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* Make sparc target multi-archable: April 2000
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*/
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#if defined (GDB_MULTI_ARCH) && (GDB_MULTI_ARCH > 0)
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/* Multi-arch definition of TARGET_IS_SPARC64, TARGET_ELF64 */
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#undef GDB_TARGET_IS_SPARC64
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#define GDB_TARGET_IS_SPARC64 \
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(sparc_intreg_size () == 8)
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#undef TARGET_ELF64
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#define TARGET_ELF64 \
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(sparc_intreg_size () == 8)
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extern int sparc_intreg_size (void);
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#else
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/* Non-multi-arch: if it isn't defined, define it to zero. */
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#ifndef GDB_TARGET_IS_SPARC64
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#define GDB_TARGET_IS_SPARC64 0
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#endif
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#ifndef TARGET_ELF64
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#define TARGET_ELF64 0
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#endif
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#endif
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#if !defined (GDB_MULTI_ARCH) || (GDB_MULTI_ARCH == 0)
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/*
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* The following defines must go away for MULTI_ARCH
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*/
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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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}
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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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/* 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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/* 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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#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 FP_REGNUM 30 /* Contains address of executing 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 PC_REGNUM 68 /* Contains program counter */
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#define NPC_REGNUM 69 /* Contains next PC */
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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 better to
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remove the ins and locals from `registers', make sure that
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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
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hand, 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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#define REGISTER_BYTE(N) ((N)*4)
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/* Number of bytes of storage in the actual machine representation for
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register N. */
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/* On the SPARC, all regs are 4 bytes (except Sparc64, where they're 8). */
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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 (except Sparc64, where they're 8). */
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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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/* 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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/* Advance PC across any function entry prologue instructions
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to reach some "real" code. */
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extern CORE_ADDR sparc_skip_prologue (CORE_ADDR);
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#define SKIP_PROLOGUE(PC) sparc_skip_prologue (PC)
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/* Immediately after a function call, return the saved pc.
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Can't go through the frames for this because on some machines
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the new frame is not set up until the new function executes
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some instructions. */
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#define SAVED_PC_AFTER_CALL(FRAME) PC_ADJUST (read_register (RP_REGNUM))
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/* Stack grows downward. */
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#define INNER_THAN(LHS,RHS) ((LHS) < (RHS))
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/* Write into appropriate registers a function return value of type
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TYPE, given in virtual format. */
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#define DEPRECATED_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 (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 DEPRECATED_EXTRACT_STRUCT_VALUE_ADDRESS(REGBUF) \
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sparc_extract_struct_value_address (REGBUF)
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extern CORE_ADDR sparc_extract_struct_value_address (char *);
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/* If the current gcc for for this target does not produce correct
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debugging information for float parameters, both prototyped and
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unprototyped, then define this macro. This forces gdb to always
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assume that floats are passed as doubles and then converted in the
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callee. */
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#define COERCE_FLOAT_TO_DOUBLE(FORMAL, ACTUAL) (1)
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/* Stack must be aligned on 64-bit boundaries when synthesizing
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function calls (128-bit for sparc64). */
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#define STACK_ALIGN(ADDR) sparc32_stack_align (ADDR)
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extern CORE_ADDR sparc32_stack_align (CORE_ADDR addr);
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/* The Sparc returns long doubles on the stack. */
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#define RETURN_VALUE_ON_STACK(TYPE) \
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(TYPE_CODE(TYPE) == TYPE_CODE_FLT \
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&& TYPE_LENGTH(TYPE) > 8)
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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) \
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sparc_reg_struct_has_addr (GCC_P, TYPE)
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extern int sparc_reg_struct_has_addr (int, struct type *);
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/* Is the prologue at PC frameless? */
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#define PROLOGUE_FRAMELESS_P(PC) sparc_prologue_frameless_p (PC)
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extern int sparc_prologue_frameless_p (CORE_ADDR);
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#endif /* GDB_MULTI_ARCH */
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#if defined (GDB_MULTI_ARCH) && (GDB_MULTI_ARCH > 0)
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/*
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* The following defines should ONLY appear for MULTI_ARCH.
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*/
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/* Multi-arch the nPC and Y registers. */
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#define Y_REGNUM (sparc_y_regnum ())
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extern int sparc_npc_regnum (void);
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extern int sparc_y_regnum (void);
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#endif /* GDB_MULTI_ARCH */
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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 (CORE_ADDR);
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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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/* 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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/* Sequence of bytes for breakpoint instruction (ta 1). */
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#define BREAKPOINT {0x91, 0xd0, 0x20, 0x01}
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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 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 I7_REGNUM 31 /* Last local reg saved on stack frame */
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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 FPS_REGNUM 70 /* Floating point status register */
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#define CPS_REGNUM 71 /* Coprocessor status register */
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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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/*
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||
* FRAME_CHAIN and FRAME_INFO definitions, collected here for convenience.
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||
*/
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||
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||
#if !defined (GDB_MULTI_ARCH) || (GDB_MULTI_ARCH == 0)
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||
/*
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||
* The following defines must go away for MULTI_ARCH.
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||
*/
|
||
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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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||
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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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||
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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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||
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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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||
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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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||
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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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||
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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
|
||
stack frames are allocated in different segments (e.g. some on a
|
||
stack, some on a heap in the data segment).
|
||
|
||
GCC 2.6 and later can generate ``flat register window'' code that
|
||
makes frames by explicitly saving those registers that need to be
|
||
saved. %i7 is used as the frame pointer, and the frame is laid out
|
||
so that flat and non-flat calls can be intermixed freely within a
|
||
program. Unfortunately for GDB, this means it must detect and
|
||
record the flatness of frames.
|
||
|
||
Since the prologue in a flat frame also tells us where fp and pc
|
||
have been stashed (the frame is of variable size, so their location
|
||
is not fixed), it's convenient to record them in the frame info. */
|
||
|
||
#define EXTRA_FRAME_INFO \
|
||
CORE_ADDR bottom; \
|
||
int in_prologue; \
|
||
int flat; \
|
||
/* Following fields only relevant for flat frames. */ \
|
||
CORE_ADDR pc_addr; \
|
||
CORE_ADDR fp_addr; \
|
||
/* Add this to ->frame to get the value of the stack pointer at the */ \
|
||
/* time of the register saves. */ \
|
||
int sp_offset;
|
||
|
||
/* We need to override GET_SAVED_REGISTER so that we can deal with the
|
||
way outs change into ins in different frames. */
|
||
|
||
void sparc_get_saved_register (char *raw_buffer,
|
||
int *optimized,
|
||
CORE_ADDR * addrp,
|
||
struct frame_info *frame,
|
||
int regnum, enum lval_type *lvalp);
|
||
|
||
#define GET_SAVED_REGISTER(RAW_BUFFER, OPTIMIZED, ADDRP, FRAME, REGNUM, LVAL) \
|
||
sparc_get_saved_register (RAW_BUFFER, OPTIMIZED, ADDRP, \
|
||
FRAME, REGNUM, LVAL)
|
||
|
||
#define FRAME_INIT_SAVED_REGS(FP) /*no-op */
|
||
|
||
#define INIT_EXTRA_FRAME_INFO(FROMLEAF, FCI) \
|
||
sparc_init_extra_frame_info (FROMLEAF, FCI)
|
||
extern void sparc_init_extra_frame_info (int, struct frame_info *);
|
||
|
||
#define FRAME_CHAIN(THISFRAME) (sparc_frame_chain (THISFRAME))
|
||
extern CORE_ADDR sparc_frame_chain (struct frame_info *);
|
||
|
||
/* A macro that tells us whether the function invocation represented
|
||
by FI does not have a frame on the stack associated with it. If it
|
||
does not, FRAMELESS is set to 1, else 0. */
|
||
|
||
#define FRAMELESS_FUNCTION_INVOCATION(FI) \
|
||
frameless_look_for_prologue (FI)
|
||
|
||
/* Where is the PC for a specific frame */
|
||
|
||
#define FRAME_SAVED_PC(FRAME) sparc_frame_saved_pc (FRAME)
|
||
extern CORE_ADDR sparc_frame_saved_pc (struct frame_info *);
|
||
|
||
/* If the argument is on the stack, it will be here. */
|
||
#define FRAME_ARGS_ADDRESS(FI) ((FI)->frame)
|
||
|
||
#define FRAME_LOCALS_ADDRESS(FI) ((FI)->frame)
|
||
|
||
/* Set VAL to the number of args passed to frame described by FI.
|
||
Can set VAL to -1, meaning no way to tell. */
|
||
|
||
/* We can't tell how many args there are
|
||
now that the C compiler delays popping them. */
|
||
#define FRAME_NUM_ARGS(FI) (-1)
|
||
|
||
/* Return number of bytes at start of arglist that are not really args. */
|
||
|
||
#define FRAME_ARGS_SKIP 68
|
||
|
||
#endif /* GDB_MULTI_ARCH */
|
||
|
||
#define PRINT_EXTRA_FRAME_INFO(FI) \
|
||
sparc_print_extra_frame_info (FI)
|
||
extern void sparc_print_extra_frame_info (struct frame_info *);
|
||
|
||
/* INIT_EXTRA_FRAME_INFO needs the PC to detect flat frames. */
|
||
|
||
#define INIT_FRAME_PC(FROMLEAF, PREV) /* nothing */
|
||
#define INIT_FRAME_PC_FIRST(FROMLEAF, PREV) \
|
||
(PREV)->pc = ((FROMLEAF) ? SAVED_PC_AFTER_CALL ((PREV)->next) : \
|
||
(PREV)->next ? FRAME_SAVED_PC ((PREV)->next) : read_pc ());
|
||
|
||
/* Define other aspects of the stack frame. */
|
||
|
||
/* The location of I0 w.r.t SP. This is actually dependent on how the
|
||
system's window overflow/underflow routines are written. Most
|
||
vendors save the L regs followed by the I regs (at the higher
|
||
address). Some vendors get it wrong. */
|
||
|
||
#define FRAME_SAVED_L0 0
|
||
#define FRAME_SAVED_I0 (8 * REGISTER_RAW_SIZE (L0_REGNUM))
|
||
|
||
#define FRAME_STRUCT_ARGS_ADDRESS(FI) ((FI)->frame)
|
||
|
||
/* Things needed for making the inferior call functions. */
|
||
/*
|
||
* First of all, let me give my opinion of what the DUMMY_FRAME
|
||
* actually looks like.
|
||
*
|
||
* | |
|
||
* | |
|
||
* + - - - - - - - - - - - - - - - - +<-- fp (level 0)
|
||
* | |
|
||
* | |
|
||
* | |
|
||
* | |
|
||
* | Frame of innermost program |
|
||
* | function |
|
||
* | |
|
||
* | |
|
||
* | |
|
||
* | |
|
||
* | |
|
||
* |---------------------------------|<-- sp (level 0), fp (c)
|
||
* | |
|
||
* DUMMY | fp0-31 |
|
||
* | |
|
||
* | ------ |<-- fp - 0x80
|
||
* FRAME | g0-7 |<-- fp - 0xa0
|
||
* | i0-7 |<-- fp - 0xc0
|
||
* | other |<-- fp - 0xe0
|
||
* | ? |
|
||
* | ? |
|
||
* |---------------------------------|<-- sp' = fp - 0x140
|
||
* | |
|
||
* xcution start | |
|
||
* sp' + 0x94 -->| CALL_DUMMY (x code) |
|
||
* | |
|
||
* | |
|
||
* |---------------------------------|<-- sp'' = fp - 0x200
|
||
* | align sp to 8 byte boundary |
|
||
* | ==> args to fn <== |
|
||
* Room for | |
|
||
* i & l's + agg | CALL_DUMMY_STACK_ADJUST = 0x0x44|
|
||
* |---------------------------------|<-- final sp (variable)
|
||
* | |
|
||
* | Where function called will |
|
||
* | build frame. |
|
||
* | |
|
||
* | |
|
||
*
|
||
* I understand everything in this picture except what the space
|
||
* between fp - 0xe0 and fp - 0x140 is used for. Oh, and I don't
|
||
* understand why there's a large chunk of CALL_DUMMY that never gets
|
||
* executed (its function is superceeded by PUSH_DUMMY_FRAME; they
|
||
* are designed to do the same thing).
|
||
*
|
||
* 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).
|
||
*/
|
||
|
||
#ifndef CALL_DUMMY
|
||
/* This sequence of words is the instructions
|
||
|
||
00: bc 10 00 01 mov %g1, %fp
|
||
04: 9d e3 80 00 save %sp, %g0, %sp
|
||
08: bc 10 00 02 mov %g2, %fp
|
||
0c: be 10 00 03 mov %g3, %i7
|
||
10: da 03 a0 58 ld [ %sp + 0x58 ], %o5
|
||
14: d8 03 a0 54 ld [ %sp + 0x54 ], %o4
|
||
18: d6 03 a0 50 ld [ %sp + 0x50 ], %o3
|
||
1c: d4 03 a0 4c ld [ %sp + 0x4c ], %o2
|
||
20: d2 03 a0 48 ld [ %sp + 0x48 ], %o1
|
||
24: 40 00 00 00 call <fun>
|
||
28: d0 03 a0 44 ld [ %sp + 0x44 ], %o0
|
||
2c: 01 00 00 00 nop
|
||
30: 91 d0 20 01 ta 1
|
||
34: 01 00 00 00 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).
|
||
*/
|
||
|
||
#if !defined (GDB_MULTI_ARCH) || (GDB_MULTI_ARCH == 0)
|
||
/*
|
||
* The following defines must go away for MULTI_ARCH.
|
||
*/
|
||
|
||
#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 0x38
|
||
|
||
/* 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 + 0x24)
|
||
|
||
/* Offset within CALL_DUMMY of the 'ta 1' trap instruction. */
|
||
|
||
#define CALL_DUMMY_BREAKPOINT_OFFSET (CALL_DUMMY_START_OFFSET + 0x30)
|
||
|
||
#define CALL_DUMMY_STACK_ADJUST 68
|
||
|
||
/* Call dummy method (eg. on stack, at entry point, etc.) */
|
||
|
||
#define CALL_DUMMY_LOCATION ON_STACK
|
||
|
||
/* Method for detecting dummy frames. */
|
||
|
||
#define PC_IN_CALL_DUMMY(PC, SP, FRAME_ADDRESS) \
|
||
pc_in_call_dummy_on_stack (PC, SP, FRAME_ADDRESS)
|
||
|
||
#endif /* GDB_MULTI_ARCH */
|
||
|
||
#endif /* CALL_DUMMY */
|
||
|
||
#if !defined (GDB_MULTI_ARCH) || (GDB_MULTI_ARCH == 0)
|
||
/*
|
||
* The following defines must go away for MULTI_ARCH.
|
||
*/
|
||
|
||
/* 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 (char *dummy, CORE_ADDR pc, CORE_ADDR fun,
|
||
struct type *value_type, int using_gcc);
|
||
|
||
/* Arguments smaller than an int must be promoted to ints when
|
||
synthesizing function calls. */
|
||
|
||
/* 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 (void);
|
||
void sparc_pop_frame (void);
|
||
|
||
#define PUSH_ARGUMENTS(NARGS, ARGS, SP, STRUCT_RETURN, STRUCT_ADDR) \
|
||
sparc32_push_arguments (NARGS, ARGS, SP, STRUCT_RETURN, STRUCT_ADDR)
|
||
|
||
extern CORE_ADDR
|
||
sparc32_push_arguments (int, struct value **, CORE_ADDR, int, CORE_ADDR);
|
||
|
||
/* Store the address of the place in which to copy the structure the
|
||
subroutine will return. This is called from call_function_by_hand.
|
||
The ultimate mystery is, tho, what is the value "16"? */
|
||
|
||
#define STORE_STRUCT_RETURN(ADDR, SP) \
|
||
{ char val[4]; \
|
||
store_unsigned_integer (val, 4, (ADDR)); \
|
||
write_memory ((SP)+(16*4), val, 4); }
|
||
|
||
/* Default definition of USE_STRUCT_CONVENTION. */
|
||
|
||
#ifndef USE_STRUCT_CONVENTION
|
||
#define USE_STRUCT_CONVENTION(GCC_P, TYPE) \
|
||
generic_use_struct_convention (GCC_P, TYPE)
|
||
#endif
|
||
|
||
/* Extract from an array REGBUF containing the (raw) register state a
|
||
function return value of type TYPE, and copy that, in virtual
|
||
format, into VALBUF. */
|
||
|
||
#define DEPRECATED_EXTRACT_RETURN_VALUE(TYPE, REGBUF, VALBUF) \
|
||
sparc32_extract_return_value (TYPE, REGBUF, VALBUF)
|
||
extern void sparc32_extract_return_value (struct type *, char[], char *);
|
||
|
||
#endif /* GDB_MULTI_ARCH */
|
||
|
||
|
||
/* Sparc has no reliable single step ptrace call */
|
||
|
||
#define SOFTWARE_SINGLE_STEP_P() 1
|
||
extern void sparc_software_single_step (enum target_signal, int);
|
||
#define SOFTWARE_SINGLE_STEP(sig,bp_p) sparc_software_single_step (sig,bp_p)
|
||
|
||
/* 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 (int, CORE_ADDR *);
|
||
|
||
extern void sparc_do_registers_info (int regnum, int all);
|
||
#undef DEPRECATED_DO_REGISTERS_INFO
|
||
#define DEPRECATED_DO_REGISTERS_INFO(REGNUM,ALL) sparc_do_registers_info (REGNUM, ALL)
|
||
|
||
/* 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;
|
||
|
||
/* Select the sparc disassembler */
|
||
|
||
#define TM_PRINT_INSN_MACH bfd_mach_sparc
|
||
|