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 GNU CC.
   6
   7 GNU CC 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 GNU CC 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 GNU CC; 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 LINUX_DEFAULT_ELF
  23
  24 #define TARGET_VERSION fprintf (stderr, " (x86-64 Linux/ELF)");
  25
  26 #define TARGET_OS_CPP_BUILTINS()                                \
  27   do                                                            \
  28     {                                                           \
  29         builtin_define_std ("linux");                           \
  30         builtin_define_std ("unix");                            \
  31         builtin_define ("__gnu_linux__");                       \
  32         builtin_define ("__ELF__");                             \
  33         builtin_assert ("system=posix");                        \
  34         if (flag_pic)                                           \
  35           {                                                     \
  36             builtin_define ("__PIC__");                         \
  37             builtin_define ("__pic__");                         \
  38           }                                                     \
  39     }                                                           \
  40   while (0)
  41
  42 #undef CPP_SPEC
  43 #define CPP_SPEC "%{posix:-D_POSIX_SOURCE} %{pthread:-D_REENTRANT}"
  44
  45 /* The svr4 ABI for the i386 says that records and unions are returned
  46    in memory.  In the 64bit compilation we will turn this flag off in
  47    override_options, as we never do pcc_struct_return scheme on this target.  */
  48 #undef DEFAULT_PCC_STRUCT_RETURN
  49 #define DEFAULT_PCC_STRUCT_RETURN 1
  50
  51 /* Provide a LINK_SPEC.  Here we provide support for the special GCC
  52    options -static and -shared, which allow us to link things in one
  53    of these three modes by applying the appropriate combinations of
  54    options at link-time.
  55
  56    When the -shared link option is used a final link is not being
  57    done.  */
  58
  59 #undef  LINK_SPEC
  60 #define LINK_SPEC "%{!m32:-m elf_x86_64} %{m32:-m elf_i386} \
  61   %{shared:-shared} \
  62   %{!shared: \
  63     %{!static: \
  64       %{rdynamic:-export-dynamic} \
  65       %{m32:%{!dynamic-linker:-dynamic-linker /lib/ld-linux.so.2}} \
  66       %{!m32:%{!dynamic-linker:-dynamic-linker /lib64/ld-linux-x86-64.so.2}}} \
  67     %{static:-static}}"
  68
  69 #undef  STARTFILE_SPEC
  70 #define STARTFILE_SPEC \
  71   "%{!shared: \
  72      %{pg:gcrt1.o%s} %{!pg:%{p:gcrt1.o%s} \
  73      %{!p:%{profile:gcrt1.o%s} %{!profile:crt1.o%s}}}} \
  74    crti.o%s %{static:crtbeginT.o%s} \
  75    %{!static:%{!shared:crtbegin.o%s} %{shared:crtbeginS.o%s}}"
  76
  77 #undef  ENDFILE_SPEC
  78 #define ENDFILE_SPEC "%{!shared:crtend.o%s} %{shared:crtendS.o%s} crtn.o%s"
  79
  80 #define MULTILIB_DEFAULTS { "m64" }
  81
  82 /* Do code reading to identify a signal frame, and set the frame
  83    state data appropriately.  See unwind-dw2.c for the structs.
  84    Don't use this at all if inhibit_libc is used.  */
  85
  86 #ifndef inhibit_libc
  87 #ifdef IN_LIBGCC2
  88 #include <signal.h>
  89 #include <sys/ucontext.h>
  90 #endif
  91
  92 #ifdef __x86_64__
  93 #define MD_FALLBACK_FRAME_STATE_FOR(CONTEXT, FS, SUCCESS)               \
  94   do {                                                                  \
  95     unsigned char *pc_ = (CONTEXT)->ra;                                 \
  96     struct sigcontext *sc_;                                             \
  97     long new_cfa_;                                                      \
  98                                                                         \
  99     /* movq __NR_rt_sigreturn, %rax ; syscall  */                       \
 100     if (*(unsigned char *)(pc_+0) == 0x48                               \
 101         && *(unsigned long *)(pc_+1) == 0x050f0000000fc0c7)             \
 102       {                                                                 \
 103         struct ucontext *uc_ = (CONTEXT)->cfa;                          \
 104         sc_ = (struct sigcontext *) &uc_->uc_mcontext;                  \
 105       }                                                                 \
 106     else                                                                \
 107       break;                                                            \
 108                                                                         \
 109     new_cfa_ = sc_->rsp;                                                \
 110     (FS)->cfa_how = CFA_REG_OFFSET;                                     \
 111     /* Register 7 is rsp  */                                            \
 112     (FS)->cfa_reg = 7;                                                  \
 113     (FS)->cfa_offset = new_cfa_ - (long) (CONTEXT)->cfa;                \
 114                                                                         \
 115     /* The SVR4 register numbering macros aren't usable in libgcc.  */  \
 116     (FS)->regs.reg[0].how = REG_SAVED_OFFSET;                           \
 117     (FS)->regs.reg[0].loc.offset = (long)&sc_->rax - new_cfa_;          \
 118     (FS)->regs.reg[1].how = REG_SAVED_OFFSET;                           \
 119     (FS)->regs.reg[1].loc.offset = (long)&sc_->rbx - new_cfa_;          \
 120     (FS)->regs.reg[2].how = REG_SAVED_OFFSET;                           \
 121     (FS)->regs.reg[2].loc.offset = (long)&sc_->rcx - new_cfa_;          \
 122     (FS)->regs.reg[3].how = REG_SAVED_OFFSET;                           \
 123     (FS)->regs.reg[3].loc.offset = (long)&sc_->rdx - new_cfa_;          \
 124     (FS)->regs.reg[4].how = REG_SAVED_OFFSET;                           \
 125     (FS)->regs.reg[4].loc.offset = (long)&sc_->rbp - new_cfa_;          \
 126     (FS)->regs.reg[5].how = REG_SAVED_OFFSET;                           \
 127     (FS)->regs.reg[5].loc.offset = (long)&sc_->rsi - new_cfa_;          \
 128     (FS)->regs.reg[6].how = REG_SAVED_OFFSET;                           \
 129     (FS)->regs.reg[6].loc.offset = (long)&sc_->rdi - new_cfa_;          \
 130     (FS)->regs.reg[8].how = REG_SAVED_OFFSET;                           \
 131     (FS)->regs.reg[8].loc.offset = (long)&sc_->r8 - new_cfa_;           \
 132     (FS)->regs.reg[9].how = REG_SAVED_OFFSET;                           \
 133     (FS)->regs.reg[9].loc.offset = (long)&sc_->r9 - new_cfa_;           \
 134     (FS)->regs.reg[10].how = REG_SAVED_OFFSET;                          \
 135     (FS)->regs.reg[10].loc.offset = (long)&sc_->r10 - new_cfa_;         \
 136     (FS)->regs.reg[11].how = REG_SAVED_OFFSET;                          \
 137     (FS)->regs.reg[11].loc.offset = (long)&sc_->r11 - new_cfa_;         \
 138     (FS)->regs.reg[12].how = REG_SAVED_OFFSET;                          \
 139     (FS)->regs.reg[12].loc.offset = (long)&sc_->r12 - new_cfa_;         \
 140     (FS)->regs.reg[13].how = REG_SAVED_OFFSET;                          \
 141     (FS)->regs.reg[13].loc.offset = (long)&sc_->r13 - new_cfa_;         \
 142     (FS)->regs.reg[14].how = REG_SAVED_OFFSET;                          \
 143     (FS)->regs.reg[14].loc.offset = (long)&sc_->r14 - new_cfa_;         \
 144     (FS)->regs.reg[15].how = REG_SAVED_OFFSET;                          \
 145     (FS)->regs.reg[15].loc.offset = (long)&sc_->r15 - new_cfa_;         \
 146     (FS)->retaddr_column = 16;                                          \
 147     goto SUCCESS;                                                       \
 148   } while (0)
 149 #else /* ifdef __x86_64__  */
 150 #define MD_FALLBACK_FRAME_STATE_FOR(CONTEXT, FS, SUCCESS)               \
 151   do {                                                                  \
 152     unsigned char *pc_ = (CONTEXT)->ra;                                 \
 153     struct sigcontext *sc_;                                             \
 154     long new_cfa_;                                                      \
 155                                                                         \
 156     /* popl %eax ; movl $__NR_sigreturn,%eax ; int $0x80  */            \
 157     if (*(unsigned short *)(pc_+0) == 0xb858                            \
 158         && *(unsigned int *)(pc_+2) == 119                              \
 159         && *(unsigned short *)(pc_+6) == 0x80cd)                        \
 160       sc_ = (CONTEXT)->cfa + 4;                                         \
 161     /* movl $__NR_rt_sigreturn,%eax ; int $0x80  */                     \
 162     else if (*(unsigned char *)(pc_+0) == 0xb8                          \
 163              && *(unsigned int *)(pc_+1) == 173                         \
 164              && *(unsigned short *)(pc_+5) == 0x80cd)                   \
 165       {                                                                 \
 166         struct rt_sigframe {                                            \
 167           int sig;                                                      \
 168           struct siginfo *pinfo;                                        \
 169           void *puc;                                                    \
 170           struct siginfo info;                                          \
 171           struct ucontext uc;                                           \
 172         } *rt_ = (CONTEXT)->cfa;                                        \
 173         sc_ = (struct sigcontext *) &rt_->uc.uc_mcontext;               \
 174       }                                                                 \
 175     else                                                                \
 176       break;                                                            \
 177                                                                         \
 178     new_cfa_ = sc_->esp;                                                \
 179     (FS)->cfa_how = CFA_REG_OFFSET;                                     \
 180     (FS)->cfa_reg = 4;                                                  \
 181     (FS)->cfa_offset = new_cfa_ - (long) (CONTEXT)->cfa;                \
 182                                                                         \
 183     /* The SVR4 register numbering macros aren't usable in libgcc.  */  \
 184     (FS)->regs.reg[0].how = REG_SAVED_OFFSET;                           \
 185     (FS)->regs.reg[0].loc.offset = (long)&sc_->eax - new_cfa_;          \
 186     (FS)->regs.reg[3].how = REG_SAVED_OFFSET;                           \
 187     (FS)->regs.reg[3].loc.offset = (long)&sc_->ebx - new_cfa_;          \
 188     (FS)->regs.reg[1].how = REG_SAVED_OFFSET;                           \
 189     (FS)->regs.reg[1].loc.offset = (long)&sc_->ecx - new_cfa_;          \
 190     (FS)->regs.reg[2].how = REG_SAVED_OFFSET;                           \
 191     (FS)->regs.reg[2].loc.offset = (long)&sc_->edx - new_cfa_;          \
 192     (FS)->regs.reg[6].how = REG_SAVED_OFFSET;                           \
 193     (FS)->regs.reg[6].loc.offset = (long)&sc_->esi - new_cfa_;          \
 194     (FS)->regs.reg[7].how = REG_SAVED_OFFSET;                           \
 195     (FS)->regs.reg[7].loc.offset = (long)&sc_->edi - new_cfa_;          \
 196     (FS)->regs.reg[5].how = REG_SAVED_OFFSET;                           \
 197     (FS)->regs.reg[5].loc.offset = (long)&sc_->ebp - new_cfa_;          \
 198     (FS)->regs.reg[8].how = REG_SAVED_OFFSET;                           \
 199     (FS)->regs.reg[8].loc.offset = (long)&sc_->eip - new_cfa_;          \
 200     (FS)->retaddr_column = 8;                                           \
 201     goto SUCCESS;                                                       \
 202   } while (0)
 203 #endif /* ifdef __x86_64__  */
 204 #endif /* ifdef inhibit_libc  */