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 HAVE_SSE_REGS
  30 #endif
  31
  32 #include "i386/tm-i386.h"
  33 #include "tm-linux.h"
  34
  35 /* Register number for the "orig_eax" pseudo-register.  If this
  36    pseudo-register contains a value >= 0 it is interpreted as the
  37    system call number that the kernel is supposed to restart.  */
  38 #define I386_LINUX_ORIG_EAX_REGNUM (NUM_GREGS + NUM_FREGS + NUM_SSE_REGS)
  39
  40 /* Adjust a few macros to deal with this extra register.  */
  41
  42 #undef NUM_REGS
  43 #define NUM_REGS (NUM_GREGS + NUM_FREGS + NUM_SSE_REGS + 1)
  44
  45 #undef MAX_NUM_REGS
  46 #define MAX_NUM_REGS (16 + 16 + 9 + 1)
  47
  48 #undef REGISTER_BYTES
  49 #define REGISTER_BYTES \
  50   (SIZEOF_GREGS + SIZEOF_FPU_REGS + SIZEOF_FPU_CTRL_REGS + SIZEOF_SSE_REGS + 4)
  51
  52 #undef REGISTER_NAME
  53 #define REGISTER_NAME(reg) i386_linux_register_name ((reg))
  54 extern char *i386_linux_register_name (int reg);
  55
  56 #undef REGISTER_BYTE
  57 #define REGISTER_BYTE(reg) i386_linux_register_byte ((reg))
  58 extern int i386_linux_register_byte (int reg);
  59
  60 #undef REGISTER_RAW_SIZE
  61 #define REGISTER_RAW_SIZE(reg) i386_linux_register_raw_size ((reg))
  62 extern int i386_linux_register_raw_size (int reg);
  63
  64 /* GNU/Linux ELF uses stabs-in-ELF with the DWARF register numbering
  65    scheme by default, so we must redefine STAB_REG_TO_REGNUM.  This
  66    messes up the floating-point registers for a.out, but there is not
  67    much we can do about that.  */
  68 #undef STAB_REG_TO_REGNUM
  69 #define STAB_REG_TO_REGNUM(reg) i386_dwarf_reg_to_regnum ((reg))
  70
  71 /* Use target_specific function to define link map offsets.  */
  72 extern struct link_map_offsets *i386_linux_svr4_fetch_link_map_offsets (void);
  73 #define SVR4_FETCH_LINK_MAP_OFFSETS() i386_linux_svr4_fetch_link_map_offsets ()
  74
  75 /* The following works around a problem with /usr/include/sys/procfs.h  */
  76 #define sys_quotactl 1
  77
  78 /* When the i386 Linux kernel calls a signal handler, the return
  79    address points to a bit of code on the stack.  These definitions
  80    are used to identify this bit of code as a signal trampoline in
  81    order to support backtracing through calls to signal handlers.  */
  82
  83 #define IN_SIGTRAMP(pc, name) i386_linux_in_sigtramp (pc, name)
  84 extern int i386_linux_in_sigtramp (CORE_ADDR, char *);
  85
  86 #undef FRAME_CHAIN
  87 #define FRAME_CHAIN(frame) i386_linux_frame_chain (frame)
  88 extern CORE_ADDR i386_linux_frame_chain (struct frame_info *frame);
  89
  90 #undef FRAME_SAVED_PC
  91 #define FRAME_SAVED_PC(frame) i386_linux_frame_saved_pc (frame)
  92 extern CORE_ADDR i386_linux_frame_saved_pc (struct frame_info *frame);
  93
  94 #undef SAVED_PC_AFTER_CALL
  95 #define SAVED_PC_AFTER_CALL(frame) i386_linux_saved_pc_after_call (frame)
  96 extern CORE_ADDR i386_linux_saved_pc_after_call (struct frame_info *);
  97
  98 #define TARGET_WRITE_PC(pc, ptid) i386_linux_write_pc (pc, ptid)
  99 extern void i386_linux_write_pc (CORE_ADDR pc, ptid_t ptid);
 100
 101 /* When we call a function in a shared library, and the PLT sends us
 102    into the dynamic linker to find the function's real address, we
 103    need to skip over the dynamic linker call.  This function decides
 104    when to skip, and where to skip to.  See the comments for
 105    SKIP_SOLIB_RESOLVER at the top of infrun.c.  */
 106 #define SKIP_SOLIB_RESOLVER i386_linux_skip_solib_resolver
 107 extern CORE_ADDR i386_linux_skip_solib_resolver (CORE_ADDR pc);
 108
 109 /* N_FUN symbols in shared libaries have 0 for their values and need
 110    to be relocated. */
 111 #define SOFUN_ADDRESS_MAYBE_MISSING
 112 \f
 113
 114 /* Support for longjmp.  */
 115
 116 /* Details about jmp_buf.  It's supposed to be an array of integers.  */
 117
 118 #define JB_ELEMENT_SIZE 4       /* Size of elements in jmp_buf.  */
 119 #define JB_PC           5       /* Array index of saved PC.  */
 120
 121 /* Figure out where the longjmp will land.  Slurp the args out of the
 122    stack.  We expect the first arg to be a pointer to the jmp_buf
 123    structure from which we extract the pc (JB_PC) that we will land
 124    at.  The pc is copied into ADDR.  This routine returns true on
 125    success.  */
 126
 127 #define GET_LONGJMP_TARGET(addr) get_longjmp_target (addr)
 128 extern int get_longjmp_target (CORE_ADDR *addr);
 129
 130 #endif /* #ifndef TM_LINUX_H */