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