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/* Macro definitions for GDB on an Intel i386 running SVR4.
Copyright (C) 1991, Free Software Foundation, Inc.
Written by Fred Fish at Cygnus Support (fnf@cygint)
This file is part of GDB.
This program 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 2 of the License, or
(at your option) any later version.
This program 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 this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
/* Use the alternate method of determining valid frame chains. */
#define FRAME_CHAIN_VALID_ALTERNATE
/* number of traps that happen between exec'ing the shell
* to run an inferior, and when we finally get to
* the inferior code. This is 2 on most implementations.
*/
#define START_INFERIOR_TRAPS_EXPECTED 2
/* Pick up most of what we need from the generic i386 target include file. */
#include "tm-i386v.h"
/* Pick up more stuff from the generic SVR4 host include file. */
#include "tm-sysv4.h"
/* We can't tell how many args there are
now that the C compiler delays popping them. */
#undef FRAME_NUM_ARGS
#define FRAME_NUM_ARGS(val,fi) (val = -1)
/* Offsets (in target ints) into jmp_buf. Not defined in any system header
file, so we have to step through setjmp/longjmp with a debugger and figure
them out. Note that <setjmp> defines _JBLEN as 10, which is the default
if no specific machine is selected, even though we only use 6 slots. */
#define JB_ELEMENT_SIZE sizeof(int) /* jmp_buf[_JBLEN] is array of ints */
#define JB_EBX 0
#define JB_ESI 1
#define JB_EDI 2
#define JB_EBP 3
#define JB_ESP 4
#define JB_EDX 5
#define JB_PC JB_EDX /* Setjmp()'s return PC saved in EDX */
/* Figure out where the longjmp will land. Slurp the args out of the stack.
We expect the first arg to be a pointer to the jmp_buf structure from which
we extract the pc (JB_PC) that we will land at. The pc is copied into ADDR.
This routine returns true on success */
#define GET_LONGJMP_TARGET(ADDR) get_longjmp_target(ADDR)
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