1 /* Macro definitions for GDB on an Intel i386 running SVR4.
2 Copyright (C) 1991, Free Software Foundation, Inc.
3 Written by Fred Fish at Cygnus Support (fnf@cygint)
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
21 /* Use the alternate method of determining valid frame chains. */
23 #define FRAME_CHAIN_VALID_ALTERNATE
25 /* number of traps that happen between exec'ing the shell
26 * to run an inferior, and when we finally get to
27 * the inferior code. This is 2 on most implementations.
29 #define START_INFERIOR_TRAPS_EXPECTED 2
31 /* Pick up most of what we need from the generic i386 target include file. */
35 /* Pick up more stuff from the generic SVR4 host include file. */
39 /* We can't tell how many args there are
40 now that the C compiler delays popping them. */
43 #define FRAME_NUM_ARGS(val,fi) (val = -1)
45 /* Offsets (in target ints) into jmp_buf. Not defined in any system header
46 file, so we have to step through setjmp/longjmp with a debugger and figure
47 them out. Note that <setjmp> defines _JBLEN as 10, which is the default
48 if no specific machine is selected, even though we only use 6 slots. */
50 #define JB_ELEMENT_SIZE sizeof(int) /* jmp_buf[_JBLEN] is array of ints */
59 #define JB_PC JB_EDX /* Setjmp()'s return PC saved in EDX */
61 /* Figure out where the longjmp will land. Slurp the args out of the stack.
62 We expect the first arg to be a pointer to the jmp_buf structure from which
63 we extract the pc (JB_PC) that we will land at. The pc is copied into ADDR.
64 This routine returns true on success */
67 get_longjmp_target
PARAMS ((CORE_ADDR
*));
69 #define GET_LONGJMP_TARGET(ADDR) get_longjmp_target(ADDR)
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