From e7cbfeff174df51ab0ff27565faca8c6d3cb0978 Mon Sep 17 00:00:00 2001 From: Jim Kingdon Date: Mon, 4 Oct 1993 17:28:19 +0000 Subject: Rename i386lynx-tdep.c to i386ly-tdep.c for 14 character file names --- gdb/i386ly-tdep.c | 43 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 43 insertions(+) create mode 100644 gdb/i386ly-tdep.c (limited to 'gdb/i386ly-tdep.c') diff --git a/gdb/i386ly-tdep.c b/gdb/i386ly-tdep.c new file mode 100644 index 0000000..87b0ac1 --- /dev/null +++ b/gdb/i386ly-tdep.c @@ -0,0 +1,43 @@ +/* Target-dependent code for Lynx running on i386's, for GDB. + Copyright 1988, 1989, 1991, 1992, 1993 + Free Software Foundation, Inc. + +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., 675 Mass Ave, Cambridge, MA 02139, USA. */ + +#include "defs.h" +#include "inferior.h" +#include "target.h" + +/* Return the PC of the caller from the call frame. Assumes the subr prologue + has already been executed, and the frame pointer setup. If this is the + outermost frame, we check to see if we are in a system call by examining the + previous instruction. If so, then the return PC is actually at SP+4 because + system calls use a different calling sequence. */ + +CORE_ADDR +i386lynx_saved_pc_after_call (frame) + struct frame_info *frame; +{ + char opcode[7]; + static const char call_inst[] = {0x9a, 0, 0, 0, 0, 8, 0}; /* lcall 0x8,0x0 */ + + read_memory (frame->pc - 7, opcode, 7); + if (memcmp (opcode, call_inst, 7) == 0) + return read_memory_integer (read_register (SP_REGNUM) + 4, 4); + + return read_memory_integer (read_register (SP_REGNUM), 4); +} -- cgit v1.1