projects / binutils.git / blame
| Commit | Line | Data |
|---|---|---|
| 8c6e9f05 FF |
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) | |
| 4 | ||
| 5 | This file is part of GDB. | |
| 6 | ||
| 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. | |
| 11 | ||
| 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. | |
| 16 | ||
| 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. */ | |
| 20 | ||
| 21 | /* Use the alternate method of determining valid frame chains. */ | |
| 22 | ||
| 23 | #define FRAME_CHAIN_VALID_ALTERNATE | |
| 24 | ||
| 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. | |
| 28 | */ | |
| 29 | #define START_INFERIOR_TRAPS_EXPECTED 2 | |
| 30 | ||
| ee1ad69c FF |
31 | /* Pick up most of what we need from the generic i386 target include file. */ |
| 32 | ||
| 8c6e9f05 FF |
33 | #include "tm-i386v.h" |
| 34 | ||
| ee1ad69c FF |
35 | /* Pick up more stuff from the generic SVR4 host include file. */ |
| 36 | ||
| 37 | #include "tm-sysv4.h" | |
| 38 | ||
| 8c6e9f05 FF |
39 | /* We can't tell how many args there are |
| 40 | now that the C compiler delays popping them. */ | |
| 41 | ||
| 42 | #undef FRAME_NUM_ARGS | |
| 43 | #define FRAME_NUM_ARGS(val,fi) (val = -1) | |
| d7eddc51 FF |
44 | |
| 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. */ | |
| 49 | ||
| 50 | #define JB_ELEMENT_SIZE sizeof(int) /* jmp_buf[_JBLEN] is array of ints */ | |
| 51 | ||
| 52 | #define JB_EBX 0 | |
| 53 | #define JB_ESI 1 | |
| 54 | #define JB_EDI 2 | |
| 55 | #define JB_EBP 3 | |
| 56 | #define JB_ESP 4 | |
| 57 | #define JB_EDX 5 | |
| 58 | ||
| 59 | #define JB_PC JB_EDX /* Setjmp()'s return PC saved in EDX */ | |
| 60 | ||
| 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 */ | |
| 65 | ||
| 51b57ded FF |
66 | extern int |
| 67 | get_longjmp_target PARAMS ((CORE_ADDR *)); | |
| 68 | ||
| d7eddc51 | 69 | #define GET_LONGJMP_TARGET(ADDR) get_longjmp_target(ADDR) |