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authorStan Shebs <shebs@codesourcery.com>1999-04-16 01:34:07 +0000
committerStan Shebs <shebs@codesourcery.com>1999-04-16 01:34:07 +0000
commit071ea11e85eb9d529cc5eb3d35f6247466a21b99 (patch)
tree5deda65b8d7b04d1f4cbc534c3206d328e1267ec /gdb/config/i386/tm-i386v4.h
parent1730ec6b1848f0f32154277f788fb29f88d8475b (diff)
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Initial creation of sourceware repository
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-/* Macro definitions for GDB on an Intel i386 running SVR4.
- Copyright (C) 1991, 1994 Free Software Foundation, Inc.
- Written by Fred Fish at Cygnus Support (fnf@cygnus.com)
-
-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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
-
-#ifndef TM_I386V4_H
-#define TM_I386V4_H 1
-
-/* Pick up most of what we need from the generic i386 target include file. */
-
-#include "i386/tm-i386.h"
-
-/* Pick up more stuff from the generic SVR4 host include file. */
-
-#include "tm-sysv4.h"
-
-/* Use the alternate method of determining valid frame chains. */
-
-#define FRAME_CHAIN_VALID(fp,fi) alternate_frame_chain_valid (fp, fi)
-
-/* 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)
-
-/* The following redefines make backtracing through sigtramp work.
- They manufacture a fake sigtramp frame and obtain the saved pc in sigtramp
- from the ucontext structure which is pushed by the kernel on the
- user stack. Unfortunately there are three variants of sigtramp handlers. */
-
-#define I386V4_SIGTRAMP_SAVED_PC
-#define IN_SIGTRAMP(pc, name) ((name) \
- && (STREQ ("_sigreturn", name) \
- || STREQ ("_sigacthandler", name) \
- || STREQ ("sigvechandler", name)))
-
-/* Saved Pc. Get it from ucontext if within sigtramp. */
-
-#define sigtramp_saved_pc i386v4_sigtramp_saved_pc
-extern CORE_ADDR i386v4_sigtramp_saved_pc PARAMS ((struct frame_info *));
-
-#endif /* ifndef TM_I386V4_H */