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1 /* Definitions for AMD x86-64 using GNU userspace.
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2 Copyright (C) 2001-2018 Free Software Foundation, Inc.
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3 Contributed by Jan Hubicka <jh@suse.cz>, based on linux.h.
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4
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5 This file is part of GCC.
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6
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7 GCC is free software; you can redistribute it and/or modify
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8 it under the terms of the GNU General Public License as published by
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9 the Free Software Foundation; either version 3, or (at your option)
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10 any later version.
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11
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12 GCC is distributed in the hope that it will be useful,
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13 but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 GNU General Public License for more details.
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16
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17 Under Section 7 of GPL version 3, you are granted additional
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18 permissions described in the GCC Runtime Library Exception, version
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19 3.1, as published by the Free Software Foundation.
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20
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21 You should have received a copy of the GNU General Public License and
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22 a copy of the GCC Runtime Library Exception along with this program;
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23 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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24 <http://www.gnu.org/licenses/>. */
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25
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26 /* Provide a LINK_SPEC. Here we provide support for the special GCC
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27 options -static and -shared, which allow us to link things in one
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28 of these three modes by applying the appropriate combinations of
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29 options at link-time.
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30
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31 When the -shared link option is used a final link is not being
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32 done. */
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33
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34 #if TARGET_64BIT_DEFAULT
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35 #define SPEC_32 "m16|m32"
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36 #if TARGET_BI_ARCH == 2
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37 #define SPEC_64 "m64"
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38 #define SPEC_X32 "m16|m32|m64:;"
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39 #else
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40 #define SPEC_64 "m16|m32|mx32:;"
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41 #define SPEC_X32 "mx32"
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42 #endif
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43 #else
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44 #define SPEC_32 "m64|mx32:;"
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45 #define SPEC_64 "m64"
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46 #define SPEC_X32 "mx32"
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47 #endif
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48
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49 #undef ASM_SPEC
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50 #define ASM_SPEC "%{" SPEC_32 ":--32} \
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51 %{" SPEC_64 ":--64} \
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52 %{" SPEC_X32 ":--x32} \
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53 %{msse2avx:%{!mavx:-msse2avx}}"
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54
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55 #define GNU_USER_TARGET_LINK_SPEC \
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56 "%{" SPEC_64 ":-m " GNU_USER_LINK_EMULATION64 "} \
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57 %{" SPEC_32 ":-m " GNU_USER_LINK_EMULATION32 "} \
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58 %{" SPEC_X32 ":-m " GNU_USER_LINK_EMULATIONX32 "} \
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59 %{shared:-shared} \
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60 %{!shared: \
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61 %{!static: \
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62 %{!static-pie: \
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63 %{rdynamic:-export-dynamic} \
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64 %{" SPEC_32 ":-dynamic-linker " GNU_USER_DYNAMIC_LINKER32 "} \
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65 %{" SPEC_64 ":-dynamic-linker " GNU_USER_DYNAMIC_LINKER64 "} \
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66 %{" SPEC_X32 ":-dynamic-linker " GNU_USER_DYNAMIC_LINKERX32 "}}} \
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67 %{static:-static} %{static-pie:-static -pie --no-dynamic-linker -z text}}"
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68
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69 #undef LINK_SPEC
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70 #define LINK_SPEC GNU_USER_TARGET_LINK_SPEC
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71
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72 #if TARGET_64BIT_DEFAULT
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73 #if TARGET_BI_ARCH == 2
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74 #define MULTILIB_DEFAULTS { "mx32" }
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75 #else
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76 #define MULTILIB_DEFAULTS { "m64" }
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77 #endif
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78 #else
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79 #define MULTILIB_DEFAULTS { "m32" }
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80 #endif
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81
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82 #ifdef TARGET_LIBC_PROVIDES_SSP
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83 /* i386 glibc provides __stack_chk_guard in %gs:0x14,
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84 x32 glibc provides it in %fs:0x18.
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85 x86_64 glibc provides it in %fs:0x28. */
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86 #define TARGET_THREAD_SSP_OFFSET \
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87 (TARGET_64BIT ? (TARGET_X32 ? 0x18 : 0x28) : 0x14)
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88
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89 /* i386 glibc provides __private_ss in %gs:0x30.
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90 x32 glibc provides it in %fs:0x40.
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91 x86_64 glibc provides it in %fs:0x70. */
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92 #define TARGET_THREAD_SPLIT_STACK_OFFSET \
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93 (TARGET_64BIT ? (TARGET_X32 ? 0x40 : 0x70) : 0x30)
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94 #endif
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95
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96 #undef WCHAR_TYPE
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97 #define WCHAR_TYPE (TARGET_LP64 ? "int" : "long int")
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