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56eec3c737
but not the others. * symm-tdep.c: Remove exec_file_command. [_SEQUENT_] (ptx_coff_regno_to_gdb, register_addr): New functions. A few miscellaneous cleanups. * symm-nat.c: Renamed from symm-xdep.c. * All symmetry dependent files: Many changes.
401 lines
12 KiB
C
401 lines
12 KiB
C
/* Target machine definitions for GDB on a Sequent Symmetry under dynix 3.0,
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with Weitek 1167 and i387 support.
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Copyright 1986, 1987, 1989, 1991, 1992, 1993 Free Software Foundation, Inc.
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Symmetry version by Jay Vosburgh (fubar@sequent.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., 675 Mass Ave, Cambridge, MA 02139, USA. */
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/* I don't know if this will work for cross-debugging, even if you do get
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a copy of the right include file. */
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#ifdef _SEQUENT_
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/* ptx */
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#include <sys/reg.h>
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#else
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/* dynix */
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#include <machine/reg.h>
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#endif
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#ifdef _SEQUENT_
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/* ptx, not dynix */
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#define SDB_REG_TO_REGNUM(value) ptx_coff_regno_to_gdb(value)
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extern int ptx_coff_regno_to_gdb();
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#endif /* _SEQUENT_ */
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#define START_INFERIOR_TRAPS_EXPECTED 2
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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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#include "i386/tm-i386v.h"
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/* Nonzero if instruction at PC is a return instruction. */
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/* For Symmetry, this is really the 'leave' instruction, which */
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/* is right before the ret */
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#undef
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#define ABOUT_TO_RETURN(pc) (read_memory_integer (pc, 1) == 0xc9)
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#if 0
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--- this code can't be used unless we know we are running native,
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since it uses host specific ptrace calls.
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/* code for 80387 fpu. Functions are from i386-dep.c, copied into
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* symm-dep.c.
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*/
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#define FLOAT_INFO { i386_float_info(); }
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#endif
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/* Number of machine registers */
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#undef NUM_REGS
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#define NUM_REGS 49
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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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/* Symmetry registers are in this weird order to match the register
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numbers in the symbol table entries. If you change the order,
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things will probably break mysteriously for no apparent reason.
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Also note that the st(0)...st(7) 387 registers are represented as
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st0...st7. */
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#undef REGISTER_NAMES
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#define REGISTER_NAMES { "eax", "edx", "ecx", "st0", "st1", \
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"ebx", "esi", "edi", "st2", "st3", \
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"st4", "st5", "st6", "st7", "esp", \
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"ebp", "eip", "eflags", "fp1", "fp2", \
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"fp3", "fp4", "fp5", "fp6", "fp7", \
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"fp8", "fp9", "fp10", "fp11", "fp12", \
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"fp13", "fp14", "fp15", "fp16", "fp17", \
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"fp18", "fp19", "fp20", "fp21", "fp22", \
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"fp23", "fp24", "fp25", "fp26", "fp27", \
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"fp28", "fp29", "fp30", "fp31" }
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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 EAX_REGNUM 0
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#define EDX_REGNUM 1
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#define ECX_REGNUM 2
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#define ST0_REGNUM 3
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#define ST1_REGNUM 4
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#define EBX_REGNUM 5
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#define ESI_REGNUM 6
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#define EDI_REGNUM 7
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#define ST2_REGNUM 8
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#define ST3_REGNUM 9
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#define ST4_REGNUM 10
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#define ST5_REGNUM 11
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#define ST6_REGNUM 12
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#define ST7_REGNUM 13
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#define FP1_REGNUM 18 /* first 1167 register */
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/* Get %fp2 - %fp31 by addition, since they are contiguous */
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#undef SP_REGNUM
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#define SP_REGNUM 14 /* Contains address of top of stack */
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#undef FP_REGNUM
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#define FP_REGNUM 15 /* Contains address of executing stack frame */
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#undef PC_REGNUM
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#define PC_REGNUM 16 /* Contains program counter */
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#undef PS_REGNUM
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#define PS_REGNUM 17 /* Contains processor status */
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#ifndef _SEQUENT_
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/* dynix, not ptx. For ptx, see register_addr in symm-tdep.c */
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/* The magic numbers below are offsets into u_ar0 in the user struct.
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* They live in <machine/reg.h>. Gdb calls this macro with blockend
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* holding u.u_ar0 - KERNEL_U_ADDR. Only the registers listed are
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* saved in the u area (along with a few others that aren't useful
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* here. See <machine/reg.h>).
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*/
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#define REGISTER_U_ADDR(addr, blockend, regno) \
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{ struct user foo; /* needed for finding fpu regs */ \
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switch (regno) { \
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case 0: \
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addr = blockend + EAX * sizeof(int); break; \
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case 1: \
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addr = blockend + EDX * sizeof(int); break; \
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case 2: \
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addr = blockend + ECX * sizeof(int); break; \
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case 3: /* st(0) */ \
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addr = blockend - \
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((int)&foo.u_fpusave.fpu_stack[0][0] - (int)&foo); \
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break; \
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case 4: /* st(1) */ \
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addr = blockend - \
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((int) &foo.u_fpusave.fpu_stack[1][0] - (int)&foo); \
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break; \
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case 5: \
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addr = blockend + EBX * sizeof(int); break; \
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case 6: \
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addr = blockend + ESI * sizeof(int); break; \
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case 7: \
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addr = blockend + EDI * sizeof(int); break; \
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case 8: /* st(2) */ \
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addr = blockend - \
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((int) &foo.u_fpusave.fpu_stack[2][0] - (int)&foo); \
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break; \
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case 9: /* st(3) */ \
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addr = blockend - \
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((int) &foo.u_fpusave.fpu_stack[3][0] - (int)&foo); \
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break; \
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case 10: /* st(4) */ \
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addr = blockend - \
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((int) &foo.u_fpusave.fpu_stack[4][0] - (int)&foo); \
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break; \
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case 11: /* st(5) */ \
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addr = blockend - \
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((int) &foo.u_fpusave.fpu_stack[5][0] - (int)&foo); \
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break; \
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case 12: /* st(6) */ \
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addr = blockend - \
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((int) &foo.u_fpusave.fpu_stack[6][0] - (int)&foo); \
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break; \
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case 13: /* st(7) */ \
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addr = blockend - \
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((int) &foo.u_fpusave.fpu_stack[7][0] - (int)&foo); \
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break; \
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case 14: \
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addr = blockend + ESP * sizeof(int); break; \
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case 15: \
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addr = blockend + EBP * sizeof(int); break; \
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case 16: \
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addr = blockend + EIP * sizeof(int); break; \
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case 17: \
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addr = blockend + FLAGS * sizeof(int); break; \
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case 18: /* fp1 */ \
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case 19: /* fp2 */ \
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case 20: /* fp3 */ \
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case 21: /* fp4 */ \
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case 22: /* fp5 */ \
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case 23: /* fp6 */ \
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case 24: /* fp7 */ \
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case 25: /* fp8 */ \
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case 26: /* fp9 */ \
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case 27: /* fp10 */ \
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case 28: /* fp11 */ \
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case 29: /* fp12 */ \
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case 30: /* fp13 */ \
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case 31: /* fp14 */ \
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case 32: /* fp15 */ \
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case 33: /* fp16 */ \
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case 34: /* fp17 */ \
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case 35: /* fp18 */ \
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case 36: /* fp19 */ \
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case 37: /* fp20 */ \
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case 38: /* fp21 */ \
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case 39: /* fp22 */ \
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case 40: /* fp23 */ \
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case 41: /* fp24 */ \
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case 42: /* fp25 */ \
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case 43: /* fp26 */ \
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case 44: /* fp27 */ \
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case 45: /* fp28 */ \
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case 46: /* fp29 */ \
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case 47: /* fp30 */ \
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case 48: /* fp31 */ \
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addr = blockend - \
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((int) &foo.u_fpasave.fpa_regs[(regno)-18] - (int)&foo); \
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} \
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}
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#endif /* _SEQUENT_ */
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/* Total amount of space needed to store our copies of the machine's
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register state, the array `registers'. */
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/* 10 i386 registers, 8 i387 registers, and 31 Weitek 1167 registers */
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#undef REGISTER_BYTES
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#define REGISTER_BYTES ((10 * 4) + (8 * 10) + (31 * 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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#undef REGISTER_BYTE
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#define REGISTER_BYTE(N) \
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((N < 3) ? (N * 4) : \
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(N < 5) ? (((N - 2) * 10) + 2) : \
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(N < 8) ? (((N - 5) * 4) + 32) : \
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(N < 14) ? (((N - 8) * 10) + 44) : \
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(((N - 14) * 4) + 104))
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/* Number of bytes of storage in the actual machine representation
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* for register N. All registers are 4 bytes, except 387 st(0) - st(7),
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* which are 80 bits each.
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*/
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#undef REGISTER_RAW_SIZE
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#define REGISTER_RAW_SIZE(N) \
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((N < 3) ? 4 : \
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(N < 5) ? 10 : \
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(N < 8) ? 4 : \
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(N < 14) ? 10 : \
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4)
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/* Largest value REGISTER_RAW_SIZE can have. */
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#undef MAX_REGISTER_RAW_SIZE
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#define MAX_REGISTER_RAW_SIZE 10
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/* Nonzero if register N requires conversion
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from raw format to virtual format. */
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#undef REGISTER_CONVERTIBLE
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#define REGISTER_CONVERTIBLE(N) \
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((N < 3) ? 0 : \
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(N < 5) ? 1 : \
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(N < 8) ? 0 : \
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(N < 14) ? 1 : \
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0)
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/* Convert data from raw format for register REGNUM
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to virtual format for register REGNUM. */
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#undef REGISTER_CONVERT_TO_VIRTUAL
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#define REGISTER_CONVERT_TO_VIRTUAL(REGNUM,FROM,TO) \
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((REGNUM < 3) ? bcopy ((FROM), (TO), 4) : \
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(REGNUM < 5) ? i387_to_double((FROM), (TO)) : \
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(REGNUM < 8) ? bcopy ((FROM), (TO), 4) : \
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(REGNUM < 14) ? i387_to_double((FROM), (TO)) : \
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bcopy ((FROM), (TO), 4))
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extern void
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i387_to_double PARAMS ((char *, char *));
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/* Convert data from virtual format for register REGNUM
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to raw format for register REGNUM. */
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#undef REGISTER_CONVERT_TO_RAW
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#define REGISTER_CONVERT_TO_RAW(REGNUM,FROM,TO) \
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((REGNUM < 3) ? bcopy ((FROM), (TO), 4) : \
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(REGNUM < 5) ? double_to_i387((FROM), (TO)) : \
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(REGNUM < 8) ? bcopy ((FROM), (TO), 4) : \
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(REGNUM < 14) ? double_to_i387((FROM), (TO)) : \
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bcopy ((FROM), (TO), 4))
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extern void
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double_to_i387 PARAMS ((char *, char *));
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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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#undef REGISTER_VIRTUAL_TYPE
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#define REGISTER_VIRTUAL_TYPE(N) \
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((N < 3) ? builtin_type_int : \
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(N < 5) ? builtin_type_double : \
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(N < 8) ? builtin_type_int : \
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(N < 14) ? builtin_type_double : \
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builtin_type_int)
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/* from m-i386.h (now known as tm-i386v.h). */
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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. FIXME:
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Why is it writing register 0? Is the symmetry different from tm-i386v.h,
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or is it some sort of artifact? FIXME. */
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#undef STORE_STRUCT_RETURN
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#define STORE_STRUCT_RETURN(ADDR, SP) \
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{ (SP) -= sizeof (ADDR); \
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write_memory ((SP), &(ADDR), sizeof (ADDR)); \
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write_register(0, (ADDR)); }
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/* Extract from an array REGBUF containing the (raw) register state
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a function return value of type TYPE, and copy that, in virtual format,
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into VALBUF. */
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#undef EXTRACT_RETURN_VALUE
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#define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \
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symmetry_extract_return_value(TYPE, REGBUF, VALBUF)
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/* Things needed for making the inferior call functions. FIXME: Merge
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this with the main 386 stuff. */
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#define PUSH_DUMMY_FRAME \
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{ CORE_ADDR sp = read_register (SP_REGNUM); \
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int regnum; \
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sp = push_word (sp, read_register (PC_REGNUM)); \
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sp = push_word (sp, read_register (FP_REGNUM)); \
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write_register (FP_REGNUM, sp); \
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for (regnum = 0; regnum < NUM_REGS; regnum++) \
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sp = push_word (sp, read_register (regnum)); \
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write_register (SP_REGNUM, sp); \
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}
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#define POP_FRAME \
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{ \
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FRAME frame = get_current_frame (); \
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CORE_ADDR fp; \
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int regnum; \
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struct frame_saved_regs fsr; \
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struct frame_info *fi; \
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fi = get_frame_info (frame); \
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fp = fi->frame; \
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get_frame_saved_regs (fi, &fsr); \
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for (regnum = 0; regnum < NUM_REGS; regnum++) { \
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CORE_ADDR adr; \
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adr = fsr.regs[regnum]; \
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if (adr) \
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write_register (regnum, read_memory_integer (adr, 4)); \
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} \
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write_register (FP_REGNUM, read_memory_integer (fp, 4)); \
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write_register (PC_REGNUM, read_memory_integer (fp + 4, 4)); \
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write_register (SP_REGNUM, fp + 8); \
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flush_cached_frames (); \
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set_current_frame ( create_new_frame (read_register (FP_REGNUM), \
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read_pc ())); \
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}
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/* from i386-dep.c, worked better than my original... */
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/* This sequence of words is the instructions
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* call (32-bit offset)
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* int 3
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* This is 6 bytes.
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*/
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#define CALL_DUMMY { 0x223344e8, 0xcc11 }
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#define CALL_DUMMY_LENGTH 8
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#define CALL_DUMMY_START_OFFSET 0 /* Start execution at beginning of dummy */
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/* Insert the specified number of args and function address
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into a call sequence of the above form stored at DUMMYNAME. */
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#define FIX_CALL_DUMMY(dummyname, pc, fun, nargs, args, type, gcc_p) \
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{ \
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int from, to, delta, loc; \
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loc = (int)(read_register (SP_REGNUM) - CALL_DUMMY_LENGTH); \
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from = loc + 5; \
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to = (int)(fun); \
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delta = to - from; \
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*(int *)((char *)(dummyname) + 1) = delta; \
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}
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extern void
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print_387_control_word PARAMS ((unsigned int));
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extern void
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print_387_status_word PARAMS ((unsigned int));
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