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 #undef CPP_PREDEFINES
  27 #define CPP_PREDEFINES "-D__ELF__ -Dunix -D__gnu_linux__ -Dlinux -Asystem(posix)"
  28
  29 #undef CPP_SPEC
  30 #define CPP_SPEC "%(cpp_cpu) %{fPIC:-D__PIC__ -D__pic__} %{fpic:-D__PIC__ -D__pic__} %{posix:-D_POSIX_SOURCE} %{pthread:-D_REENTRANT} %{!m32:-D__LONG_MAX__=9223372036854775807L}"
  31
  32 /* Provide a LINK_SPEC.  Here we provide support for the special GCC
  33    options -static and -shared, which allow us to link things in one
  34    of these three modes by applying the appropriate combinations of
  35    options at link-time.
  36
  37    When the -shared link option is used a final link is not being
  38    done.  */
  39
  40 #undef  LINK_SPEC
  41 #define LINK_SPEC "%{!m32:-m elf_x86_64 -Y P,/usr/lib64} %{m32:-m elf_i386} \
  42   %{shared:-shared} \
  43   %{!shared: \
  44     %{!static: \
  45       %{rdynamic:-export-dynamic} \
  46       %{m32:%{!dynamic-linker:-dynamic-linker /lib/ld-linux.so.2}} \
  47       %{!m32:%{!dynamic-linker:-dynamic-linker /lib64/ld-linux-x86-64.so.2}}} \
  48     %{static:-static}}"
  49
  50 #undef  STARTFILE_SPEC
  51 #define STARTFILE_SPEC \
  52   "%{m32:%{!shared: \
  53        %{pg:gcrt1.o%s} %{!pg:%{p:gcrt1.o%s} \
  54        %{!p:%{profile:gcrt1.o%s} %{!profile:crt1.o%s}}}} \
  55      crti.o%s %{static:crtbeginT.o%s}\
  56      %{!static:%{!shared:crtbegin.o%s} %{shared:crtbeginS.o%s}}} \
  57    %{!m32:%{!shared: \
  58        %{pg:/usr/lib64/gcrt1.o%s} %{!pg:%{p:/usr/lib64/gcrt1.o%s} \
  59        %{!p:%{profile:/usr/lib64/gcrt1.o%s} %{!profile:/usr/lib64/crt1.o%s}}}}\
  60      /usr/lib64/crti.o%s %{static:crtbeginT.o%s} \
  61      %{!static:%{!shared:crtbegin.o%s} %{shared:crtbeginS.o%s}}}"
  62
  63 #undef  ENDFILE_SPEC
  64 #define ENDFILE_SPEC "\
  65   %{m32:%{!shared:crtend.o%s} %{shared:crtendS.o%s} crtn.o%s} \
  66   %{!m32:%{!shared:crtend.o%s} %{shared:crtendS.o%s} /usr/lib64/crtn.o%s}"
  67
  68 #define MULTILIB_DEFAULTS { "m64" }
  69
  70 /* Do code reading to identify a signal frame, and set the frame
  71    state data appropriately.  See unwind-dw2.c for the structs.
  72    Don't use this at all if inhibit_libc is used.  */
  73
  74 #ifndef inhibit_libc
  75 #ifdef IN_LIBGCC2
  76 #include <signal.h>
  77 #include <sys/ucontext.h>
  78 #endif
  79
  80 #ifdef __x86_64__
  81 #define MD_FALLBACK_FRAME_STATE_FOR(CONTEXT, FS, SUCCESS)               \
  82   do {                                                                  \
  83     unsigned char *pc_ = (CONTEXT)->ra;                                 \
  84     struct sigcontext *sc_;                                             \
  85     long new_cfa_;                                                      \
  86                                                                         \
  87     /* movq __NR_rt_sigreturn, %rax ; syscall  */                       \
  88     if (*(unsigned char *)(pc_+0) == 0x48                               \
  89         && *(unsigned long *)(pc_+1) == 0x050f0000000fc0c7)             \
  90       {                                                                 \
  91         struct ucontext *uc_ = (CONTEXT)->cfa;                          \
  92         sc_ = (struct sigcontext *) &uc_->uc_mcontext;                  \
  93       }                                                                 \
  94     else                                                                \
  95       break;                                                            \
  96                                                                         \
  97     new_cfa_ = sc_->rsp;                                                \
  98     (FS)->cfa_how = CFA_REG_OFFSET;                                     \
  99     /* Register 7 is rsp  */                                            \
 100     (FS)->cfa_reg = 7;                                                  \
 101     (FS)->cfa_offset = new_cfa_ - (long) (CONTEXT)->cfa;                \
 102                                                                         \
 103     /* The SVR4 register numbering macros aren't usable in libgcc.  */  \
 104     (FS)->regs.reg[0].how = REG_SAVED_OFFSET;                           \
 105     (FS)->regs.reg[0].loc.offset = (long)&sc_->rax - new_cfa_;          \
 106     (FS)->regs.reg[1].how = REG_SAVED_OFFSET;                           \
 107     (FS)->regs.reg[1].loc.offset = (long)&sc_->rbx - new_cfa_;          \
 108     (FS)->regs.reg[2].how = REG_SAVED_OFFSET;                           \
 109     (FS)->regs.reg[2].loc.offset = (long)&sc_->rcx - new_cfa_;          \
 110     (FS)->regs.reg[3].how = REG_SAVED_OFFSET;                           \
 111     (FS)->regs.reg[3].loc.offset = (long)&sc_->rdx - new_cfa_;          \
 112     (FS)->regs.reg[4].how = REG_SAVED_OFFSET;                           \
 113     (FS)->regs.reg[4].loc.offset = (long)&sc_->rbp - new_cfa_;          \
 114     (FS)->regs.reg[5].how = REG_SAVED_OFFSET;                           \
 115     (FS)->regs.reg[5].loc.offset = (long)&sc_->rsi - new_cfa_;          \
 116     (FS)->regs.reg[6].how = REG_SAVED_OFFSET;                           \
 117     (FS)->regs.reg[6].loc.offset = (long)&sc_->rdi - new_cfa_;          \
 118     (FS)->regs.reg[8].how = REG_SAVED_OFFSET;                           \
 119     (FS)->regs.reg[8].loc.offset = (long)&sc_->r8 - new_cfa_;           \
 120     (FS)->regs.reg[9].how = REG_SAVED_OFFSET;                           \
 121     (FS)->regs.reg[9].loc.offset = (long)&sc_->r9 - new_cfa_;           \
 122     (FS)->regs.reg[10].how = REG_SAVED_OFFSET;                          \
 123     (FS)->regs.reg[10].loc.offset = (long)&sc_->r10 - new_cfa_;         \
 124     (FS)->regs.reg[11].how = REG_SAVED_OFFSET;                          \
 125     (FS)->regs.reg[11].loc.offset = (long)&sc_->r11 - new_cfa_;         \
 126     (FS)->regs.reg[12].how = REG_SAVED_OFFSET;                          \
 127     (FS)->regs.reg[12].loc.offset = (long)&sc_->r12 - new_cfa_;         \
 128     (FS)->regs.reg[13].how = REG_SAVED_OFFSET;                          \
 129     (FS)->regs.reg[13].loc.offset = (long)&sc_->r13 - new_cfa_;         \
 130     (FS)->regs.reg[14].how = REG_SAVED_OFFSET;                          \
 131     (FS)->regs.reg[14].loc.offset = (long)&sc_->r14 - new_cfa_;         \
 132     (FS)->regs.reg[15].how = REG_SAVED_OFFSET;                          \
 133     (FS)->regs.reg[15].loc.offset = (long)&sc_->r15 - new_cfa_;         \
 134     (FS)->retaddr_column = 16;                                          \
 135     goto SUCCESS;                                                       \
 136   } while (0)
 137 #else /* ifdef __x86_64__  */
 138 #define MD_FALLBACK_FRAME_STATE_FOR(CONTEXT, FS, SUCCESS)               \
 139   do {                                                                  \
 140     unsigned char *pc_ = (CONTEXT)->ra;                                 \
 141     struct sigcontext *sc_;                                             \
 142     long new_cfa_;                                                      \
 143                                                                         \
 144     /* popl %eax ; movl $__NR_sigreturn,%eax ; int $0x80  */            \
 145     if (*(unsigned short *)(pc_+0) == 0xb858                            \
 146         && *(unsigned int *)(pc_+2) == 119                              \
 147         && *(unsigned short *)(pc_+6) == 0x80cd)                        \
 148       sc_ = (CONTEXT)->cfa + 4;                                         \
 149     /* movl $__NR_rt_sigreturn,%eax ; int $0x80  */                     \
 150     else if (*(unsigned char *)(pc_+0) == 0xb8                          \
 151              && *(unsigned int *)(pc_+1) == 173                         \
 152              && *(unsigned short *)(pc_+5) == 0x80cd)                   \
 153       {                                                                 \
 154         struct rt_sigframe {                                            \
 155           int sig;                                                      \
 156           struct siginfo *pinfo;                                        \
 157           void *puc;                                                    \
 158           struct siginfo info;                                          \
 159           struct ucontext uc;                                           \
 160         } *rt_ = (CONTEXT)->cfa;                                        \
 161         sc_ = (struct sigcontext *) &rt_->uc.uc_mcontext;               \
 162       }                                                                 \
 163     else                                                                \
 164       break;                                                            \
 165                                                                         \
 166     new_cfa_ = sc_->esp;                                                \
 167     (FS)->cfa_how = CFA_REG_OFFSET;                                     \
 168     (FS)->cfa_reg = 4;                                                  \
 169     (FS)->cfa_offset = new_cfa_ - (long) (CONTEXT)->cfa;                \
 170                                                                         \
 171     /* The SVR4 register numbering macros aren't usable in libgcc.  */  \
 172     (FS)->regs.reg[0].how = REG_SAVED_OFFSET;                           \
 173     (FS)->regs.reg[0].loc.offset = (long)&sc_->eax - new_cfa_;          \
 174     (FS)->regs.reg[3].how = REG_SAVED_OFFSET;                           \
 175     (FS)->regs.reg[3].loc.offset = (long)&sc_->ebx - new_cfa_;          \
 176     (FS)->regs.reg[1].how = REG_SAVED_OFFSET;                           \
 177     (FS)->regs.reg[1].loc.offset = (long)&sc_->ecx - new_cfa_;          \
 178     (FS)->regs.reg[2].how = REG_SAVED_OFFSET;                           \
 179     (FS)->regs.reg[2].loc.offset = (long)&sc_->edx - new_cfa_;          \
 180     (FS)->regs.reg[6].how = REG_SAVED_OFFSET;                           \
 181     (FS)->regs.reg[6].loc.offset = (long)&sc_->esi - new_cfa_;          \
 182     (FS)->regs.reg[7].how = REG_SAVED_OFFSET;                           \
 183     (FS)->regs.reg[7].loc.offset = (long)&sc_->edi - new_cfa_;          \
 184     (FS)->regs.reg[5].how = REG_SAVED_OFFSET;                           \
 185     (FS)->regs.reg[5].loc.offset = (long)&sc_->ebp - new_cfa_;          \
 186     (FS)->regs.reg[8].how = REG_SAVED_OFFSET;                           \
 187     (FS)->regs.reg[8].loc.offset = (long)&sc_->eip - new_cfa_;          \
 188     (FS)->retaddr_column = 8;                                           \
 189     goto SUCCESS;                                                       \
 190   } while (0)
 191 #endif /* ifdef __x86_64__  */
 192 #endif /* ifdef inhibit_libc  */