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