gdb/config/i386/tm-linux.h

   1 /* Definitions to target GDB to GNU/Linux on 386.
   2    Copyright 1992, 1993, 1995, 1996, 1998, 1999, 2000, 2001
   3    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_LINUX_H
  23 #define TM_LINUX_H
  24
  25 #define I386_GNULINUX_TARGET
  26 #define HAVE_I387_REGS
  27 #ifdef HAVE_PTRACE_GETFPXREGS
  28 #define HAVE_SSE_REGS
  29 #endif
  30
  31 #include "i386/tm-i386.h"
  32 #include "tm-linux.h"
  33
  34 /* Linux/ELF uses stabs-in-ELF with the DWARF register numbering
  35    scheme by default, so we must redefine STAB_REG_TO_REGNUM.  This
  36    messes up the floating-point registers for a.out, but there is not
  37    much we can do about that.  */
  38 #undef STAB_REG_TO_REGNUM
  39 #define STAB_REG_TO_REGNUM(reg) i386_dwarf_reg_to_regnum ((reg))
  40
  41 /* Use target_specific function to define link map offsets.  */
  42 extern struct link_map_offsets *i386_linux_svr4_fetch_link_map_offsets (void);
  43 #define SVR4_FETCH_LINK_MAP_OFFSETS() i386_linux_svr4_fetch_link_map_offsets ()
  44
  45 /* The following works around a problem with /usr/include/sys/procfs.h  */
  46 #define sys_quotactl 1
  47
  48 /* When the i386 Linux kernel calls a signal handler, the return
  49    address points to a bit of code on the stack.  These definitions
  50    are used to identify this bit of code as a signal trampoline in
  51    order to support backtracing through calls to signal handlers.  */
  52
  53 #define IN_SIGTRAMP(pc, name) i386_linux_in_sigtramp (pc, name)
  54 extern int i386_linux_in_sigtramp (CORE_ADDR, char *);
  55
  56 #undef FRAME_CHAIN
  57 #define FRAME_CHAIN(frame) i386_linux_frame_chain (frame)
  58 extern CORE_ADDR i386_linux_frame_chain (struct frame_info *frame);
  59
  60 #undef FRAME_SAVED_PC
  61 #define FRAME_SAVED_PC(frame) i386_linux_frame_saved_pc (frame)
  62 extern CORE_ADDR i386_linux_frame_saved_pc (struct frame_info *frame);
  63
  64 #undef SAVED_PC_AFTER_CALL
  65 #define SAVED_PC_AFTER_CALL(frame) i386_linux_saved_pc_after_call (frame)
  66 extern CORE_ADDR i386_linux_saved_pc_after_call (struct frame_info *);
  67
  68 /* When we call a function in a shared library, and the PLT sends us
  69    into the dynamic linker to find the function's real address, we
  70    need to skip over the dynamic linker call.  This function decides
  71    when to skip, and where to skip to.  See the comments for
  72    SKIP_SOLIB_RESOLVER at the top of infrun.c.  */
  73 #define SKIP_SOLIB_RESOLVER i386_linux_skip_solib_resolver
  74 extern CORE_ADDR i386_linux_skip_solib_resolver (CORE_ADDR pc);
  75
  76 /* N_FUN symbols in shared libaries have 0 for their values and need
  77    to be relocated. */
  78 #define SOFUN_ADDRESS_MAYBE_MISSING
  79 \f
  80
  81 /* Support for longjmp.  */
  82
  83 /* Details about jmp_buf.  It's supposed to be an array of integers.  */
  84
  85 #define JB_ELEMENT_SIZE 4       /* Size of elements in jmp_buf.  */
  86 #define JB_PC           5       /* Array index of saved PC.  */
  87
  88 /* Figure out where the longjmp will land.  Slurp the args out of the
  89    stack.  We expect the first arg to be a pointer to the jmp_buf
  90    structure from which we extract the pc (JB_PC) that we will land
  91    at.  The pc is copied into ADDR.  This routine returns true on
  92    success.  */
  93
  94 #define GET_LONGJMP_TARGET(addr) get_longjmp_target (addr)
  95 extern int get_longjmp_target (CORE_ADDR *addr);
  96
  97 #endif /* #ifndef TM_LINUX_H */