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authorK. Richard Pixley <rich@cygnus>1991-03-28 16:28:29 +0000
committerK. Richard Pixley <rich@cygnus>1991-03-28 16:28:29 +0000
commitdd3b648e8b12ceb7bfce66e7f179b671403aea9c (patch)
tree91119a0f4943acc9293cd8baba06943621b6e6c7 /gdb/xm-vax.h
parentbd5635a1e2b38ee8432fcdaa6456079191375277 (diff)
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+/* Definitions to make GDB run on a vax under 4.2bsd.
+ Copyright (C) 1986, 1987, 1989 Free Software Foundation, Inc.
+
+This file is part of GDB.
+
+GDB is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 1, or (at your option)
+any later version.
+
+GDB is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GDB; see the file COPYING. If not, write to
+the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#define HOST_BYTE_ORDER LITTLE_ENDIAN
+
+/* Get rid of any system-imposed stack limit if possible. */
+
+#define SET_STACK_LIMIT_HUGE
+
+/* This is the amount to subtract from u.u_ar0
+ to get the offset in the core file of the register values. */
+
+#define KERNEL_U_ADDR (0x80000000 - (UPAGES * NBPG))
+
+#define REGISTER_U_ADDR(addr, blockend, regno) \
+{ addr = blockend - 0110 + regno * 4; \
+ if (regno == PC_REGNUM) addr = blockend - 8; \
+ if (regno == PS_REGNUM) addr = blockend - 4; \
+ if (regno == FP_REGNUM) addr = blockend - 0120; \
+ if (regno == AP_REGNUM) addr = blockend - 0124; \
+ if (regno == SP_REGNUM) addr = blockend - 20; }
+
+/* Interface definitions for kernel debugger KDB. */
+
+/* Map machine fault codes into signal numbers.
+ First subtract 0, divide by 4, then index in a table.
+ Faults for which the entry in this table is 0
+ are not handled by KDB; the program's own trap handler
+ gets to handle then. */
+
+#define FAULT_CODE_ORIGIN 0
+#define FAULT_CODE_UNITS 4
+#define FAULT_TABLE \
+{ 0, SIGKILL, SIGSEGV, 0, 0, 0, 0, 0, \
+ 0, 0, SIGTRAP, SIGTRAP, 0, 0, 0, 0, \
+ 0, 0, 0, 0, 0, 0, 0, 0}
+
+/* Start running with a stack stretching from BEG to END.
+ BEG and END should be symbols meaningful to the assembler.
+ This is used only for kdb. */
+
+#define INIT_STACK(beg, end) \
+{ asm (".globl end"); \
+ asm ("movl $ end, sp"); \
+ asm ("clrl fp"); }
+
+/* Push the frame pointer register on the stack. */
+#define PUSH_FRAME_PTR \
+ asm ("pushl fp");
+
+/* Copy the top-of-stack to the frame pointer register. */
+#define POP_FRAME_PTR \
+ asm ("movl (sp), fp");
+
+/* After KDB is entered by a fault, push all registers
+ that GDB thinks about (all NUM_REGS of them),
+ so that they appear in order of ascending GDB register number.
+ The fault code will be on the stack beyond the last register. */
+
+#define PUSH_REGISTERS \
+{ asm ("pushl 8(sp)"); \
+ asm ("pushl 8(sp)"); \
+ asm ("pushal 0x14(sp)"); \
+ asm ("pushr $037777"); }
+
+/* Assuming the registers (including processor status) have been
+ pushed on the stack in order of ascending GDB register number,
+ restore them and return to the address in the saved PC register. */
+
+#define POP_REGISTERS \
+{ asm ("popr $037777"); \
+ asm ("subl2 $8,(sp)"); \
+ asm ("movl (sp),sp"); \
+ asm ("rei"); }