gcc/config/i386/linux64.h

   1 /* Definitions for AMD x86-64 running Linux-based GNU systems with ELF format.
   2    Copyright (C) 2001, 2002 Free Software Foundation, Inc.
   3    Contributed by Jan Hubicka <jh@suse.cz>, based on linux.h.
   4
   5 This file is part of GCC.
   6
   7 GCC 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, or (at your option)
  10 any later version.
  11
  12 GCC 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 GCC; see the file COPYING.  If not, write to
  19 the Free Software Foundation, 59 Temple Place - Suite 330,
  20 Boston, MA 02111-1307, USA.  */
  21
  22 #define TARGET_VERSION fprintf (stderr, " (x86-64 Linux/ELF)");
  23
  24 #define TARGET_OS_CPP_BUILTINS()                                \
  25   do                                                            \
  26     {                                                           \
  27         builtin_define_std ("linux");                           \
  28         builtin_define_std ("unix");                            \
  29         builtin_define ("__gnu_linux__");                       \
  30         builtin_assert ("system=posix");                        \
  31         if (flag_pic)                                           \
  32           {                                                     \
  33             builtin_define ("__PIC__");                         \
  34             builtin_define ("__pic__");                         \
  35           }                                                     \
  36     }                                                           \
  37   while (0)
  38
  39 #undef CPP_SPEC
  40 #define CPP_SPEC "%{posix:-D_POSIX_SOURCE} %{pthread:-D_REENTRANT}"
  41
  42 /* The svr4 ABI for the i386 says that records and unions are returned
  43    in memory.  In the 64bit compilation we will turn this flag off in
  44    override_options, as we never do pcc_struct_return scheme on this target.  */
  45 #undef DEFAULT_PCC_STRUCT_RETURN
  46 #define DEFAULT_PCC_STRUCT_RETURN 1
  47
  48 /* We arrange for the whole %fs segment to map the tls area.  */
  49 #undef TARGET_TLS_DIRECT_SEG_REFS_DEFAULT
  50 #define TARGET_TLS_DIRECT_SEG_REFS_DEFAULT MASK_TLS_DIRECT_SEG_REFS
  51
  52 /* Provide a LINK_SPEC.  Here we provide support for the special GCC
  53    options -static and -shared, which allow us to link things in one
  54    of these three modes by applying the appropriate combinations of
  55    options at link-time.
  56
  57    When the -shared link option is used a final link is not being
  58    done.  */
  59
  60 #undef  LINK_SPEC
  61 #define LINK_SPEC "%{!m32:-m elf_x86_64} %{m32:-m elf_i386} \
  62   %{shared:-shared} \
  63   %{!shared: \
  64     %{!static: \
  65       %{rdynamic:-export-dynamic} \
  66       %{m32:%{!dynamic-linker:-dynamic-linker /lib/ld-linux.so.2}} \
  67       %{!m32:%{!dynamic-linker:-dynamic-linker /lib64/ld-linux-x86-64.so.2}}} \
  68     %{static:-static}}"
  69
  70 #define MULTILIB_DEFAULTS { "m64" }
  71
  72 #undef NEED_INDICATE_EXEC_STACK
  73 #define NEED_INDICATE_EXEC_STACK 1
  74
  75 /* Do code reading to identify a signal frame, and set the frame
  76    state data appropriately.  See unwind-dw2.c for the structs.
  77    Don't use this at all if inhibit_libc is used.  */
  78
  79 #ifndef inhibit_libc
  80 #ifdef IN_LIBGCC2
  81 #include <signal.h>
  82 #include <sys/ucontext.h>
  83 #endif
  84
  85 #ifdef __x86_64__
  86 #define MD_FALLBACK_FRAME_STATE_FOR(CONTEXT, FS, SUCCESS)               \
  87   do {                                                                  \
  88     unsigned char *pc_ = (CONTEXT)->ra;                                 \
  89     struct sigcontext *sc_;                                             \
  90     long new_cfa_;                                                      \
  91                                                                         \
  92     /* movq __NR_rt_sigreturn, %rax ; syscall  */                       \
  93     if (*(unsigned char *)(pc_+0) == 0x48                               \
  94         && *(unsigned long *)(pc_+1) == 0x050f0000000fc0c7)             \
  95       {                                                                 \
  96         struct ucontext *uc_ = (CONTEXT)->cfa;                          \
  97         sc_ = (struct sigcontext *) &uc_->uc_mcontext;                  \
  98       }                                                                 \
  99     else                                                                \
 100       break;                                                            \
 101                                                                         \
 102     new_cfa_ = sc_->rsp;                                                \
 103     (FS)->cfa_how = CFA_REG_OFFSET;                                     \
 104     /* Register 7 is rsp  */                                            \
 105     (FS)->cfa_reg = 7;                                                  \
 106     (FS)->cfa_offset = new_cfa_ - (long) (CONTEXT)->cfa;                \
 107                                                                         \
 108     /* The SVR4 register numbering macros aren't usable in libgcc.  */  \
 109     (FS)->regs.reg[0].how = REG_SAVED_OFFSET;                           \
 110     (FS)->regs.reg[0].loc.offset = (long)&sc_->rax - new_cfa_;          \
 111     (FS)->regs.reg[1].how = REG_SAVED_OFFSET;                           \
 112     (FS)->regs.reg[1].loc.offset = (long)&sc_->rdx - new_cfa_;          \
 113     (FS)->regs.reg[2].how = REG_SAVED_OFFSET;                           \
 114     (FS)->regs.reg[2].loc.offset = (long)&sc_->rcx - new_cfa_;          \
 115     (FS)->regs.reg[3].how = REG_SAVED_OFFSET;                           \
 116     (FS)->regs.reg[3].loc.offset = (long)&sc_->rbx - new_cfa_;          \
 117     (FS)->regs.reg[4].how = REG_SAVED_OFFSET;                           \
 118     (FS)->regs.reg[4].loc.offset = (long)&sc_->rsi - new_cfa_;          \
 119     (FS)->regs.reg[5].how = REG_SAVED_OFFSET;                           \
 120     (FS)->regs.reg[5].loc.offset = (long)&sc_->rdi - new_cfa_;          \
 121     (FS)->regs.reg[6].how = REG_SAVED_OFFSET;                           \
 122     (FS)->regs.reg[6].loc.offset = (long)&sc_->rbp - new_cfa_;          \
 123     (FS)->regs.reg[8].how = REG_SAVED_OFFSET;                           \
 124     (FS)->regs.reg[8].loc.offset = (long)&sc_->r8 - new_cfa_;           \
 125     (FS)->regs.reg[9].how = REG_SAVED_OFFSET;                           \
 126     (FS)->regs.reg[9].loc.offset = (long)&sc_->r9 - new_cfa_;           \
 127     (FS)->regs.reg[10].how = REG_SAVED_OFFSET;                          \
 128     (FS)->regs.reg[10].loc.offset = (long)&sc_->r10 - new_cfa_;         \
 129     (FS)->regs.reg[11].how = REG_SAVED_OFFSET;                          \
 130     (FS)->regs.reg[11].loc.offset = (long)&sc_->r11 - new_cfa_;         \
 131     (FS)->regs.reg[12].how = REG_SAVED_OFFSET;                          \
 132     (FS)->regs.reg[12].loc.offset = (long)&sc_->r12 - new_cfa_;         \
 133     (FS)->regs.reg[13].how = REG_SAVED_OFFSET;                          \
 134     (FS)->regs.reg[13].loc.offset = (long)&sc_->r13 - new_cfa_;         \
 135     (FS)->regs.reg[14].how = REG_SAVED_OFFSET;                          \
 136     (FS)->regs.reg[14].loc.offset = (long)&sc_->r14 - new_cfa_;         \
 137     (FS)->regs.reg[15].how = REG_SAVED_OFFSET;                          \
 138     (FS)->regs.reg[15].loc.offset = (long)&sc_->r15 - new_cfa_;         \
 139     (FS)->regs.reg[16].how = REG_SAVED_OFFSET;                          \
 140     (FS)->regs.reg[16].loc.offset = (long)&sc_->rip - new_cfa_;         \
 141     (FS)->retaddr_column = 16;                                          \
 142     goto SUCCESS;                                                       \
 143   } while (0)
 144 #else /* ifdef __x86_64__  */
 145 #define MD_FALLBACK_FRAME_STATE_FOR(CONTEXT, FS, SUCCESS)               \
 146   do {                                                                  \
 147     unsigned char *pc_ = (CONTEXT)->ra;                                 \
 148     struct sigcontext *sc_;                                             \
 149     long new_cfa_;                                                      \
 150                                                                         \
 151     /* popl %eax ; movl $__NR_sigreturn,%eax ; int $0x80  */            \
 152     if (*(unsigned short *)(pc_+0) == 0xb858                            \
 153         && *(unsigned int *)(pc_+2) == 119                              \
 154         && *(unsigned short *)(pc_+6) == 0x80cd)                        \
 155       sc_ = (CONTEXT)->cfa + 4;                                         \
 156     /* movl $__NR_rt_sigreturn,%eax ; int $0x80  */                     \
 157     else if (*(unsigned char *)(pc_+0) == 0xb8                          \
 158              && *(unsigned int *)(pc_+1) == 173                         \
 159              && *(unsigned short *)(pc_+5) == 0x80cd)                   \
 160       {                                                                 \
 161         struct rt_sigframe {                                            \
 162           int sig;                                                      \
 163           struct siginfo *pinfo;                                        \
 164           void *puc;                                                    \
 165           struct siginfo info;                                          \
 166           struct ucontext uc;                                           \
 167         } *rt_ = (CONTEXT)->cfa;                                        \
 168         sc_ = (struct sigcontext *) &rt_->uc.uc_mcontext;               \
 169       }                                                                 \
 170     else                                                                \
 171       break;                                                            \
 172                                                                         \
 173     new_cfa_ = sc_->esp;                                                \
 174     (FS)->cfa_how = CFA_REG_OFFSET;                                     \
 175     (FS)->cfa_reg = 4;                                                  \
 176     (FS)->cfa_offset = new_cfa_ - (long) (CONTEXT)->cfa;                \
 177                                                                         \
 178     /* The SVR4 register numbering macros aren't usable in libgcc.  */  \
 179     (FS)->regs.reg[0].how = REG_SAVED_OFFSET;                           \
 180     (FS)->regs.reg[0].loc.offset = (long)&sc_->eax - new_cfa_;          \
 181     (FS)->regs.reg[3].how = REG_SAVED_OFFSET;                           \
 182     (FS)->regs.reg[3].loc.offset = (long)&sc_->ebx - new_cfa_;          \
 183     (FS)->regs.reg[1].how = REG_SAVED_OFFSET;                           \
 184     (FS)->regs.reg[1].loc.offset = (long)&sc_->ecx - new_cfa_;          \
 185     (FS)->regs.reg[2].how = REG_SAVED_OFFSET;                           \
 186     (FS)->regs.reg[2].loc.offset = (long)&sc_->edx - new_cfa_;          \
 187     (FS)->regs.reg[6].how = REG_SAVED_OFFSET;                           \
 188     (FS)->regs.reg[6].loc.offset = (long)&sc_->esi - new_cfa_;          \
 189     (FS)->regs.reg[7].how = REG_SAVED_OFFSET;                           \
 190     (FS)->regs.reg[7].loc.offset = (long)&sc_->edi - new_cfa_;          \
 191     (FS)->regs.reg[5].how = REG_SAVED_OFFSET;                           \
 192     (FS)->regs.reg[5].loc.offset = (long)&sc_->ebp - new_cfa_;          \
 193     (FS)->regs.reg[8].how = REG_SAVED_OFFSET;                           \
 194     (FS)->regs.reg[8].loc.offset = (long)&sc_->eip - new_cfa_;          \
 195     (FS)->retaddr_column = 8;                                           \
 196     goto SUCCESS;                                                       \
 197   } while (0)
 198 #endif /* ifdef __x86_64__  */
 199 #endif /* ifdef inhibit_libc  */