| 1 | /* Target machine description for MIPS running SVR4, for GDB. |
| 2 | Copyright 1994, 1995 Free Software Foundation, Inc. |
| 3 | |
| 4 | This file is part of GDB. |
| 5 | |
| 6 | This program is free software; you can redistribute it and/or modify |
| 7 | it under the terms of the GNU General Public License as published by |
| 8 | the Free Software Foundation; either version 2 of the License, or |
| 9 | (at your option) any later version. |
| 10 | |
| 11 | This program is distributed in the hope that it will be useful, |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | GNU General Public License for more details. |
| 15 | |
| 16 | You should have received a copy of the GNU General Public License |
| 17 | along with this program; if not, write to the Free Software |
| 18 | Foundation, Inc., 59 Temple Place - Suite 330, |
| 19 | Boston, MA 02111-1307, USA. */ |
| 20 | |
| 21 | #include "mips/tm-bigmips.h" |
| 22 | #include "tm-sysv4.h" |
| 23 | |
| 24 | /* When calling functions on a MIPS SVR4 ABI compliant platform |
| 25 | $25 must hold the function address. Dest_Reg is a macro |
| 26 | used in CALL_DUMMY in tm-mips.h. */ |
| 27 | #undef Dest_Reg |
| 28 | #define Dest_Reg 25 |
| 29 | |
| 30 | /* The signal handler trampoline is called _sigtramp. */ |
| 31 | #undef IN_SIGTRAMP |
| 32 | #define IN_SIGTRAMP(pc, name) ((name) && STREQ ("_sigtramp", name)) |
| 33 | |
| 34 | /* On entry to the signal handler trampoline, an ucontext is already |
| 35 | pushed on the stack. We can get at the saved registers via the |
| 36 | mcontext which is contained within the ucontext. */ |
| 37 | #define SIGFRAME_BASE 0 |
| 38 | #define SIGFRAME_REGSAVE_OFF (SIGFRAME_BASE + 40) |
| 39 | #define SIGFRAME_PC_OFF (SIGFRAME_BASE + 40 + 35 * 4) |
| 40 | #define SIGFRAME_FPREGSAVE_OFF (SIGFRAME_BASE + 40 + 36 * 4) |
| 41 | |
| 42 | /* Use the alternate method of determining valid frame chains. */ |
| 43 | #define FRAME_CHAIN_VALID(fp,fi) func_frame_chain_valid (fp, fi) |
| 44 | |
| 45 | /* Convert a DWARF register number to a gdb REGNUM. */ |
| 46 | #define DWARF_REG_TO_REGNUM(num) ((num) < 32 ? (num) : (num)+FP0_REGNUM-32) |