gdb/config/i386/tm-linux.h

   1 /* Definitions to target GDB to GNU/Linux on 386.
   2
   3    Copyright 1992, 1993, 1995, 1996, 1998, 1999, 2000, 2001, 2002 Free
   4    Software Foundation, Inc.
   5
   6    This file is part of GDB.
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 2 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program; if not, write to the Free Software
  20    Foundation, Inc., 59 Temple Place - Suite 330,
  21    Boston, MA 02111-1307, USA.  */
  22
  23 #ifndef TM_LINUX_H
  24 #define TM_LINUX_H
  25
  26 #define I386_GNULINUX_TARGET
  27 #define HAVE_I387_REGS
  28 #ifdef HAVE_PTRACE_GETFPXREGS
  29 #define FILL_FPXREGSET
  30 #define HAVE_SSE_REGS
  31 #endif
  32
  33 #include "i386/tm-i386.h"
  34 #include "config/tm-linux.h"
  35
  36 /* Register number for the "orig_eax" pseudo-register.  If this
  37    pseudo-register contains a value >= 0 it is interpreted as the
  38    system call number that the kernel is supposed to restart.  */
  39 #define I386_LINUX_ORIG_EAX_REGNUM (NUM_GREGS + NUM_FREGS + NUM_SSE_REGS)
  40
  41 /* Adjust a few macros to deal with this extra register.  */
  42
  43 #undef NUM_REGS
  44 #define NUM_REGS (NUM_GREGS + NUM_FREGS + NUM_SSE_REGS + 1)
  45
  46 #undef MAX_NUM_REGS
  47 #define MAX_NUM_REGS (16 + 16 + 9 + 1)
  48
  49 #undef REGISTER_BYTES
  50 #define REGISTER_BYTES \
  51   (SIZEOF_GREGS + SIZEOF_FPU_REGS + SIZEOF_FPU_CTRL_REGS + SIZEOF_SSE_REGS + 4)
  52
  53 #undef REGISTER_NAME
  54 #define REGISTER_NAME(reg) i386_linux_register_name ((reg))
  55 extern char *i386_linux_register_name (int reg);
  56
  57 #undef REGISTER_BYTE
  58 #define REGISTER_BYTE(reg) i386_linux_register_byte ((reg))
  59 extern int i386_linux_register_byte (int reg);
  60
  61 #undef REGISTER_RAW_SIZE
  62 #define REGISTER_RAW_SIZE(reg) i386_linux_register_raw_size ((reg))
  63 extern int i386_linux_register_raw_size (int reg);
  64
  65 /* GNU/Linux ELF uses stabs-in-ELF with the DWARF register numbering
  66    scheme by default, so we must redefine STAB_REG_TO_REGNUM.  This
  67    messes up the floating-point registers for a.out, but there is not
  68    much we can do about that.  */
  69 #undef STAB_REG_TO_REGNUM
  70 #define STAB_REG_TO_REGNUM(reg) i386_dwarf_reg_to_regnum ((reg))
  71
  72 /* Use target_specific function to define link map offsets.  */
  73 extern struct link_map_offsets *i386_linux_svr4_fetch_link_map_offsets (void);
  74 #define SVR4_FETCH_LINK_MAP_OFFSETS() i386_linux_svr4_fetch_link_map_offsets ()
  75
  76 /* The following works around a problem with /usr/include/sys/procfs.h  */
  77 #define sys_quotactl 1
  78
  79 /* When the i386 Linux kernel calls a signal handler, the return
  80    address points to a bit of code on the stack.  These definitions
  81    are used to identify this bit of code as a signal trampoline in
  82    order to support backtracing through calls to signal handlers.  */
  83
  84 #define IN_SIGTRAMP(pc, name) i386_linux_in_sigtramp (pc, name)
  85 extern int i386_linux_in_sigtramp (CORE_ADDR, char *);
  86
  87 #undef FRAME_CHAIN
  88 #define FRAME_CHAIN(frame) i386_linux_frame_chain (frame)
  89 extern CORE_ADDR i386_linux_frame_chain (struct frame_info *frame);
  90
  91 #undef FRAME_SAVED_PC
  92 #define FRAME_SAVED_PC(frame) i386_linux_frame_saved_pc (frame)
  93 extern CORE_ADDR i386_linux_frame_saved_pc (struct frame_info *frame);
  94
  95 #undef SAVED_PC_AFTER_CALL
  96 #define SAVED_PC_AFTER_CALL(frame) i386_linux_saved_pc_after_call (frame)
  97 extern CORE_ADDR i386_linux_saved_pc_after_call (struct frame_info *);
  98
  99 #define TARGET_WRITE_PC(pc, ptid) i386_linux_write_pc (pc, ptid)
 100 extern void i386_linux_write_pc (CORE_ADDR pc, ptid_t ptid);
 101
 102 /* When we call a function in a shared library, and the PLT sends us
 103    into the dynamic linker to find the function's real address, we
 104    need to skip over the dynamic linker call.  This function decides
 105    when to skip, and where to skip to.  See the comments for
 106    SKIP_SOLIB_RESOLVER at the top of infrun.c.  */
 107 #define SKIP_SOLIB_RESOLVER i386_linux_skip_solib_resolver
 108 extern CORE_ADDR i386_linux_skip_solib_resolver (CORE_ADDR pc);
 109
 110 /* N_FUN symbols in shared libaries have 0 for their values and need
 111    to be relocated. */
 112 #define SOFUN_ADDRESS_MAYBE_MISSING
 113 \f
 114
 115 /* Support for longjmp.  */
 116
 117 /* Details about jmp_buf.  It's supposed to be an array of integers.  */
 118
 119 #define JB_ELEMENT_SIZE 4       /* Size of elements in jmp_buf.  */
 120 #define JB_PC           5       /* Array index of saved PC.  */
 121
 122 /* Figure out where the longjmp will land.  Slurp the args out of the
 123    stack.  We expect the first arg to be a pointer to the jmp_buf
 124    structure from which we extract the pc (JB_PC) that we will land
 125    at.  The pc is copied into ADDR.  This routine returns true on
 126    success.  */
 127
 128 #define GET_LONGJMP_TARGET(addr) get_longjmp_target (addr)
 129 extern int get_longjmp_target (CORE_ADDR *addr);
 130
 131 #endif /* #ifndef TM_LINUX_H */