gdb/config/alpha/tm-alphalinux.h

   1 /* Definitions to make GDB run on an Alpha box under Linux.  The
   2    definitions here are used when the _target_ system is running Linux.
   3    Copyright 1996 Free Software Foundation, Inc.
   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., 59 Temple Place - Suite 330,
  20    Boston, MA 02111-1307, USA.  */
  21
  22 #ifndef TM_LINUXALPHA_H
  23 #define TM_LINUXALPHA_H
  24
  25 #include "alpha/tm-alpha.h"
  26
  27 /* Are we currently handling a signal ?  */
  28
  29 extern long alpha_linux_sigtramp_offset PARAMS ((CORE_ADDR));
  30 #undef IN_SIGTRAMP
  31 #define IN_SIGTRAMP(pc, name)   (alpha_linux_sigtramp_offset (pc) >= 0)
  32
  33 /* Get start and end address of sigtramp handler.  */
  34
  35 #define SIGTRAMP_START(pc)      (pc - alpha_linux_sigtramp_offset (pc))
  36 #define SIGTRAMP_END(pc)        (SIGTRAMP_START(pc) + 3*4)
  37
  38
  39 /* Number of traps that happen between exec'ing the shell to run an
  40    inferior, and when we finally get to the inferior code.  This is 2
  41    on Linux and most implementations.  */
  42
  43 #undef START_INFERIOR_TRAPS_EXPECTED
  44 #define START_INFERIOR_TRAPS_EXPECTED 2
  45
  46 /* Return TRUE if procedure descriptor PROC is a procedure descriptor
  47    that refers to a dynamically generated sigtramp function.  */
  48
  49 #undef PROC_DESC_IS_DYN_SIGTRAMP
  50 #define PROC_SIGTRAMP_MAGIC     0x0e0f0f0f
  51 #define PROC_DESC_IS_DYN_SIGTRAMP(proc) ((proc)->pdr.isym               \
  52                                          == PROC_SIGTRAMP_MAGIC)
  53 #undef SET_PROC_DESC_IS_DYN_SIGTRAMP
  54 #define SET_PROC_DESC_IS_DYN_SIGTRAMP(proc) ((proc)->pdr.isym           \
  55                                              = PROC_SIGTRAMP_MAGIC)
  56
  57 /* If PC is inside a dynamically generated sigtramp function, return
  58    how many bytes the program counter is beyond the start of that
  59    function.  Otherwise, return a negative value.  */
  60
  61 #undef DYNAMIC_SIGTRAMP_OFFSET
  62 #define DYNAMIC_SIGTRAMP_OFFSET(pc)     (alpha_linux_sigtramp_offset (pc))
  63
  64 /* Translate a signal handler frame into the address of the sigcontext
  65    structure.  */
  66
  67 #undef SIGCONTEXT_ADDR
  68 #define SIGCONTEXT_ADDR(frame)                  ((frame)->frame - 0x298)
  69
  70 /* If FRAME refers to a sigtramp frame, return the address of the next frame.
  71
  72    Under Linux, sigtramp handlers have dynamically generated procedure
  73    descriptors that make this hack unnecessary.  */
  74
  75 #undef FRAME_PAST_SIGTRAMP_FRAME
  76 #define FRAME_PAST_SIGTRAMP_FRAME(frame, pc)    (0)
  77
  78 /* We need this for the SOLIB_TRAMPOLINE stuff.  */
  79 #include "tm-sysv4.h"
  80
  81 #endif /* TM_LINUXALPHA_H */