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/* Definitions to make GDB run on an Alpha box under Linux. The
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definitions here are used when the _target_ system is running Linux.
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Copyright 1996 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#ifndef TM_LINUXALPHA_H
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#define TM_LINUXALPHA_H
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#include "alpha/tm-alpha.h"
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/* Are we currently handling a signal ? */
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extern long alpha_linux_sigtramp_offset PARAMS ((CORE_ADDR));
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#undef IN_SIGTRAMP
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#define IN_SIGTRAMP(pc, name) (alpha_linux_sigtramp_offset (pc) >= 0)
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/* Get start and end address of sigtramp handler. */
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#define SIGTRAMP_START(pc) (pc - alpha_linux_sigtramp_offset (pc))
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#define SIGTRAMP_END(pc) (SIGTRAMP_START(pc) + 3*4)
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/* Number of traps that happen between exec'ing the shell to run an
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inferior, and when we finally get to the inferior code. This is 2
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on Linux and most implementations. */
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#undef START_INFERIOR_TRAPS_EXPECTED
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#define START_INFERIOR_TRAPS_EXPECTED 2
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/* Return TRUE if procedure descriptor PROC is a procedure descriptor
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that refers to a dynamically generated sigtramp function. */
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#undef PROC_DESC_IS_DYN_SIGTRAMP
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#define PROC_SIGTRAMP_MAGIC 0x0e0f0f0f
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#define PROC_DESC_IS_DYN_SIGTRAMP(proc) ((proc)->pdr.isym \
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== PROC_SIGTRAMP_MAGIC)
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#undef SET_PROC_DESC_IS_DYN_SIGTRAMP
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#define SET_PROC_DESC_IS_DYN_SIGTRAMP(proc) ((proc)->pdr.isym \
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= PROC_SIGTRAMP_MAGIC)
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/* If PC is inside a dynamically generated sigtramp function, return
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how many bytes the program counter is beyond the start of that
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function. Otherwise, return a negative value. */
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#undef DYNAMIC_SIGTRAMP_OFFSET
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#define DYNAMIC_SIGTRAMP_OFFSET(pc) (alpha_linux_sigtramp_offset (pc))
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/* Translate a signal handler frame into the address of the sigcontext
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structure. */
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#undef SIGCONTEXT_ADDR
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#define SIGCONTEXT_ADDR(frame) ((frame)->frame - 0x298)
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/* If FRAME refers to a sigtramp frame, return the address of the next frame.
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Under Linux, sigtramp handlers have dynamically generated procedure
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descriptors that make this hack unnecessary. */
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#undef FRAME_PAST_SIGTRAMP_FRAME
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#define FRAME_PAST_SIGTRAMP_FRAME(frame, pc) (0)
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#include "tm-linux.h"
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#endif /* TM_LINUXALPHA_H */
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