projects / deliverable / binutils-gdb.git / blame
| Commit | Line | Data |
|---|---|---|
| c906108c | 1 | /* Macro definitions for GDB on an Intel i386 running SVR4. |
| b6ba6518 KB |
2 | Copyright 1991, 1994, 1995, 1998, 1999, 2000 |
| 3 | Free Software Foundation, Inc. | |
| c906108c SS |
4 | Written by Fred Fish at Cygnus Support (fnf@cygnus.com) |
| 5 | ||
| c5aa993b | 6 | This file is part of GDB. |
| c906108c | 7 | |
| c5aa993b JM |
8 | This program is free software; you can redistribute it and/or modify |
| 9 | it under the terms of the GNU General Public License as published by | |
| 10 | the Free Software Foundation; either version 2 of the License, or | |
| 11 | (at your option) any later version. | |
| c906108c | 12 | |
| c5aa993b JM |
13 | This program is distributed in the hope that it will be useful, |
| 14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 16 | GNU General Public License for more details. | |
| c906108c | 17 | |
| c5aa993b JM |
18 | You should have received a copy of the GNU General Public License |
| 19 | along with this program; if not, write to the Free Software | |
| 20 | Foundation, Inc., 59 Temple Place - Suite 330, | |
| 21 | Boston, MA 02111-1307, USA. */ | |
| c906108c SS |
22 | |
| 23 | #ifndef TM_I386V4_H | |
| 24 | #define TM_I386V4_H 1 | |
| 25 | ||
| 26 | /* Pick up most of what we need from the generic i386 target include file. */ | |
| 27 | ||
| 28 | #include "i386/tm-i386.h" | |
| 29 | ||
| 30 | /* Pick up more stuff from the generic SVR4 host include file. */ | |
| 31 | ||
| 32 | #include "tm-sysv4.h" | |
| 33 | ||
| 34 | /* Use the alternate method of determining valid frame chains. */ | |
| 35 | ||
| c4093a6a | 36 | #define FRAME_CHAIN_VALID(fp,fi) func_frame_chain_valid (fp, fi) |
| c906108c SS |
37 | |
| 38 | /* Offsets (in target ints) into jmp_buf. Not defined in any system header | |
| 39 | file, so we have to step through setjmp/longjmp with a debugger and figure | |
| 40 | them out. Note that <setjmp> defines _JBLEN as 10, which is the default | |
| 41 | if no specific machine is selected, even though we only use 6 slots. */ | |
| 42 | ||
| 43 | #define JB_ELEMENT_SIZE sizeof(int) /* jmp_buf[_JBLEN] is array of ints */ | |
| 44 | ||
| 45 | #define JB_EBX 0 | |
| 46 | #define JB_ESI 1 | |
| 47 | #define JB_EDI 2 | |
| 48 | #define JB_EBP 3 | |
| 49 | #define JB_ESP 4 | |
| 50 | #define JB_EDX 5 | |
| 51 | ||
| c5aa993b | 52 | #define JB_PC JB_EDX /* Setjmp()'s return PC saved in EDX */ |
| c906108c SS |
53 | |
| 54 | /* Figure out where the longjmp will land. Slurp the args out of the stack. | |
| 55 | We expect the first arg to be a pointer to the jmp_buf structure from which | |
| 56 | we extract the pc (JB_PC) that we will land at. The pc is copied into ADDR. | |
| 57 | This routine returns true on success */ | |
| 58 | ||
| a14ed312 | 59 | extern int get_longjmp_target (CORE_ADDR *); |
| c906108c SS |
60 | |
| 61 | #define GET_LONGJMP_TARGET(ADDR) get_longjmp_target(ADDR) | |
| 62 | ||
| 63 | /* The following redefines make backtracing through sigtramp work. | |
| 64 | They manufacture a fake sigtramp frame and obtain the saved pc in sigtramp | |
| 65 | from the ucontext structure which is pushed by the kernel on the | |
| 66 | user stack. Unfortunately there are three variants of sigtramp handlers. */ | |
| 67 | ||
| 68 | #define I386V4_SIGTRAMP_SAVED_PC | |
| 69 | #define IN_SIGTRAMP(pc, name) ((name) \ | |
| 70 | && (STREQ ("_sigreturn", name) \ | |
| 71 | || STREQ ("_sigacthandler", name) \ | |
| 72 | || STREQ ("sigvechandler", name))) | |
| 73 | ||
| 74 | /* Saved Pc. Get it from ucontext if within sigtramp. */ | |
| 75 | ||
| 76 | #define sigtramp_saved_pc i386v4_sigtramp_saved_pc | |
| a14ed312 | 77 | extern CORE_ADDR i386v4_sigtramp_saved_pc (struct frame_info *); |
| c906108c | 78 | |
| c5aa993b | 79 | #endif /* ifndef TM_I386V4_H */ |