diff options
author | Stan Shebs <shebs@codesourcery.com> | 1999-04-16 01:35:26 +0000 |
---|---|---|
committer | Stan Shebs <shebs@codesourcery.com> | 1999-04-16 01:35:26 +0000 |
commit | c906108c21474dfb4ed285bcc0ac6fe02cd400cc (patch) | |
tree | a0015aa5cedc19ccbab307251353a41722a3ae13 /gdb/config/i386/tm-i386v4.h | |
parent | cd946cff9ede3f30935803403f06f6ed30cad136 (diff) | |
download | gdb-c906108c21474dfb4ed285bcc0ac6fe02cd400cc.zip gdb-c906108c21474dfb4ed285bcc0ac6fe02cd400cc.tar.gz gdb-c906108c21474dfb4ed285bcc0ac6fe02cd400cc.tar.bz2 |
Initial creation of sourceware repositorygdb-4_18-branchpoint
Diffstat (limited to 'gdb/config/i386/tm-i386v4.h')
-rw-r--r-- | gdb/config/i386/tm-i386v4.h | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/gdb/config/i386/tm-i386v4.h b/gdb/config/i386/tm-i386v4.h new file mode 100644 index 0000000..eafff01 --- /dev/null +++ b/gdb/config/i386/tm-i386v4.h @@ -0,0 +1,78 @@ +/* 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 */ |