gcc/config/ia64/linux.h

   1 /* Definitions for ia64-linux target.  */
   2
   3 /* This macro is a C statement to print on `stderr' a string describing the
   4    particular machine description choice.  */
   5
   6 #define TARGET_VERSION fprintf (stderr, " (IA-64) Linux");
   7
   8 /* This is for -profile to use -lc_p instead of -lc.  */
   9 #undef CC1_SPEC
  10 #define CC1_SPEC "%{profile:-p} %{G*}"
  11
  12 /* Target OS builtins.  */
  13 #define TARGET_OS_CPP_BUILTINS()                \
  14 do {                                            \
  15         builtin_assert("system=linux");         \
  16         builtin_define_std("linux");            \
  17         builtin_define_std("unix");             \
  18         builtin_define("__gnu_linux__");        \
  19         builtin_define("_LONGLONG");            \
  20 } while (0)
  21
  22 /* Need to override linux.h STARTFILE_SPEC, since it has crtbeginT.o in.  */
  23 #undef STARTFILE_SPEC
  24 #ifdef HAVE_LD_PIE
  25 #define STARTFILE_SPEC \
  26   "%{!shared: %{pg|p|profile:gcrt1.o%s;pie:Scrt1.o%s;:crt1.o%s}}\
  27    crti.o%s %{shared|pie:crtbeginS.o%s;:crtbegin.o%s}"
  28 #else
  29 #define STARTFILE_SPEC \
  30   "%{!shared: %{pg|p|profile:gcrt1.o%s;:crt1.o%s}}\
  31    crti.o%s %{shared|pie:crtbeginS.o%s;:crtbegin.o%s}"
  32 #endif
  33
  34 /* Similar to standard Linux, but adding -ffast-math support.  */
  35 #undef  ENDFILE_SPEC
  36 #define ENDFILE_SPEC \
  37   "%{ffast-math|funsafe-math-optimizations:crtfastmath.o%s} \
  38    %{shared|pie:crtendS.o%s;:crtend.o%s} crtn.o%s"
  39
  40 /* Define this for shared library support because it isn't in the main
  41    linux.h file.  */
  42
  43 #undef LINK_SPEC
  44 #define LINK_SPEC "\
  45   %{shared:-shared} \
  46   %{!shared: \
  47     %{!static: \
  48       %{rdynamic:-export-dynamic} \
  49       %{!dynamic-linker:-dynamic-linker /lib/ld-linux-ia64.so.2}} \
  50       %{static:-static}}"
  51
  52
  53 #define JMP_BUF_SIZE  76
  54
  55 /* Override linux.h LINK_EH_SPEC definition.
  56    Signalize that because we have fde-glibc, we don't need all C shared libs
  57    linked against -lgcc_s.  */
  58 #undef LINK_EH_SPEC
  59 #define LINK_EH_SPEC ""
  60
  61 /* Do code reading to identify a signal frame, and set the frame
  62    state data appropriately.  See unwind-dw2.c for the structs.  */
  63
  64 #ifdef IN_LIBGCC2
  65 #include <signal.h>
  66 #include <sys/ucontext.h>
  67
  68 #define IA64_GATE_AREA_START 0xa000000000000100LL
  69 #define IA64_GATE_AREA_END   0xa000000000020000LL
  70
  71 #define MD_FALLBACK_FRAME_STATE_FOR(CONTEXT, FS, SUCCESS)               \
  72   if ((CONTEXT)->rp >= IA64_GATE_AREA_START                             \
  73       && (CONTEXT)->rp < IA64_GATE_AREA_END)                            \
  74     {                                                                   \
  75       struct sigframe {                                                 \
  76         char scratch[16];                                               \
  77         unsigned long sig_number;                                       \
  78         struct siginfo *info;                                           \
  79         struct sigcontext *sc;                                          \
  80       } *frame_ = (struct sigframe *)(CONTEXT)->psp;                    \
  81       struct sigcontext *sc_ = frame_->sc;                              \
  82                                                                         \
  83       /* Restore scratch registers in case the unwinder needs to        \
  84          refer to a value stored in one of them.  */                    \
  85       {                                                                 \
  86         int i_;                                                         \
  87                                                                         \
  88         for (i_ = 2; i_ < 4; i_++)                                      \
  89           (CONTEXT)->ireg[i_ - 2].loc = &sc_->sc_gr[i_];                \
  90         for (i_ = 8; i_ < 12; i_++)                                     \
  91           (CONTEXT)->ireg[i_ - 2].loc = &sc_->sc_gr[i_];                \
  92         for (i_ = 14; i_ < 32; i_++)                                    \
  93           (CONTEXT)->ireg[i_ - 2].loc = &sc_->sc_gr[i_];                \
  94       }                                                                 \
  95                                                                         \
  96       (CONTEXT)->pfs_loc = &(sc_->sc_ar_pfs);                           \
  97       (CONTEXT)->lc_loc = &(sc_->sc_ar_lc);                             \
  98       (CONTEXT)->unat_loc = &(sc_->sc_ar_unat);                         \
  99       (CONTEXT)->br_loc[0] = &(sc_->sc_br[0]);                          \
 100       (CONTEXT)->bsp = sc_->sc_ar_bsp;                                  \
 101       (CONTEXT)->pr = sc_->sc_pr;                                       \
 102       (CONTEXT)->psp = sc_->sc_gr[12];                                  \
 103       (CONTEXT)->gp = sc_->sc_gr[1];                                    \
 104       /* Signal frame doesn't have an associated reg. stack frame       \
 105          other than what we adjust for below.     */                    \
 106       (FS) -> no_reg_stack_frame = 1;                                   \
 107                                                                         \
 108       /* Don't touch the branch registers o.t. b0.  The kernel doesn't  \
 109          pass the preserved branch registers in the sigcontext but      \
 110          leaves them intact, so there's no need to do anything          \
 111          with them here.  */                                            \
 112                                                                         \
 113       {                                                                 \
 114         unsigned long sof = sc_->sc_cfm & 0x7f;                         \
 115         (CONTEXT)->bsp = (unsigned long)                                \
 116           ia64_rse_skip_regs ((unsigned long *)(sc_->sc_ar_bsp), -sof); \
 117       }                                                                 \
 118                                                                         \
 119       (FS)->curr.reg[UNW_REG_RP].where = UNW_WHERE_SPREL;               \
 120       (FS)->curr.reg[UNW_REG_RP].val                                    \
 121         = (unsigned long)&(sc_->sc_ip) - (CONTEXT)->psp;                \
 122       (FS)->curr.reg[UNW_REG_RP].when = -1;                             \
 123                                                                         \
 124       goto SUCCESS;                                                     \
 125     }
 126 #endif /* IN_LIBGCC2 */