| /* 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) func_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 (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 (struct frame_info *); |
| |
| #endif /* ifndef TM_I386V4_H */ |