/* 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 */ extern int get_longjmp_target PARAMS ((CORE_ADDR *)); #define GET_LONGJMP_TARGET(ADDR) get_longjmp_target(ADDR)