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 /* ??? Maybe this should be in sysv4.h?  */
  13 #define CPP_PREDEFINES "\
  14 -D__ia64 -D__ia64__ -D__linux -D__linux__ -D_LONGLONG -Dlinux -Dunix \
  15 -D__LP64__ -D__ELF__ -Asystem=linux -Acpu=ia64 -Amachine=ia64"
  16
  17 /* ??? ia64 gas doesn't accept standard svr4 assembler options?  */
  18 #undef ASM_SPEC
  19 #define ASM_SPEC "-x %{mconstant-gp} %{mauto-pic}"
  20
  21 /* Need to override linux.h STARTFILE_SPEC, since it has crtbeginT.o in.  */
  22 #undef STARTFILE_SPEC
  23 #define STARTFILE_SPEC \
  24   "%{!shared: \
  25      %{pg:gcrt1.o%s} %{!pg:%{p:gcrt1.o%s} \
  26                        %{!p:%{profile:gcrt1.o%s} \
  27                          %{!profile:crt1.o%s}}}} \
  28    crti.o%s %{!shared:crtbegin.o%s} %{shared:crtbeginS.o%s}"
  29
  30 /* Similar to standard Linux, but adding -ffast-math support.  */
  31 #undef  ENDFILE_SPEC
  32 #define ENDFILE_SPEC \
  33   "%{ffast-math|funsafe-math-optimizations:crtfastmath.o%s} \
  34    %{!shared:crtend.o%s} %{shared:crtendS.o%s} crtn.o%s"
  35
  36 /* Define this for shared library support because it isn't in the main
  37    linux.h file.  */
  38
  39 #undef LINK_SPEC
  40 #define LINK_SPEC "\
  41   %{shared:-shared} \
  42   %{!shared: \
  43     %{!static: \
  44       %{rdynamic:-export-dynamic} \
  45       %{!dynamic-linker:-dynamic-linker /lib/ld-linux-ia64.so.2}} \
  46       %{static:-static}}"
  47
  48
  49 #define DONT_USE_BUILTIN_SETJMP
  50 #define JMP_BUF_SIZE  76
  51
  52 /* Output any profiling code before the prologue.  */
  53
  54 #undef PROFILE_BEFORE_PROLOGUE
  55 #define PROFILE_BEFORE_PROLOGUE 1
  56
  57 /* Override linux.h LINK_EH_SPEC definition.
  58    Signalize that because we have fde-glibc, we don't need all C shared libs
  59    linked against -lgcc_s.  */
  60 #undef LINK_EH_SPEC
  61 #define LINK_EH_SPEC ""
  62
  63 /* Do code reading to identify a signal frame, and set the frame
  64    state data appropriately.  See unwind-dw2.c for the structs.  */
  65
  66 #ifdef IN_LIBGCC2
  67 #include <signal.h>
  68 #include <sys/ucontext.h>
  69
  70 #define IA64_GATE_AREA_START 0xa000000000000100LL
  71 #define IA64_GATE_AREA_END   0xa000000000010000LL
  72
  73 #define MD_FALLBACK_FRAME_STATE_FOR(CONTEXT, FS, SUCCESS)               \
  74   if ((CONTEXT)->rp >= IA64_GATE_AREA_START                             \
  75       && (CONTEXT)->rp < IA64_GATE_AREA_END)                            \
  76     {                                                                   \
  77       struct sigframe {                                                 \
  78         char scratch[16];                                               \
  79         unsigned long sig_number;                                       \
  80         struct siginfo *info;                                           \
  81         struct sigcontext *sc;                                          \
  82       } *frame_ = (struct sigframe *)(CONTEXT)->psp;                    \
  83       struct sigcontext *sc_ = frame_->sc;                              \
  84                                                                         \
  85       /* Restore scratch registers in case the unwinder needs to        \
  86          refer to a value stored in one of them.  */                    \
  87       {                                                                 \
  88         int i_;                                                         \
  89                                                                         \
  90         for (i_ = 2; i_ < 4; i_++)                                      \
  91           (CONTEXT)->ireg[i_ - 2].loc = &sc_->sc_gr[i_];                \
  92         for (i_ = 8; i_ < 12; i_++)                                     \
  93           (CONTEXT)->ireg[i_ - 2].loc = &sc_->sc_gr[i_];                \
  94         for (i_ = 14; i_ < 32; i_++)                                    \
  95           (CONTEXT)->ireg[i_ - 2].loc = &sc_->sc_gr[i_];                \
  96       }                                                                 \
  97                                                                         \
  98       (CONTEXT)->pfs_loc = &(sc_->sc_ar_pfs);                           \
  99       (CONTEXT)->lc_loc = &(sc_->sc_ar_lc);                             \
 100       (CONTEXT)->unat_loc = &(sc_->sc_ar_unat);                         \
 101       (CONTEXT)->pr = sc_->sc_pr;                                       \
 102       (CONTEXT)->psp = sc_->sc_gr[12];                                  \
 103                                                                         \
 104       /* Don't touch the branch registers.  The kernel doesn't          \
 105          pass the preserved branch registers in the sigcontext but      \
 106          leaves them intact, so there's no need to do anything          \
 107          with them here.  */                                            \
 108                                                                         \
 109       {                                                                 \
 110         unsigned long sof = sc_->sc_cfm & 0x7f;                         \
 111         (CONTEXT)->bsp = (unsigned long)                                \
 112           ia64_rse_skip_regs ((unsigned long *)(sc_->sc_ar_bsp), -sof); \
 113       }                                                                 \
 114                                                                         \
 115       (FS)->curr.reg[UNW_REG_RP].where = UNW_WHERE_SPREL;               \
 116       (FS)->curr.reg[UNW_REG_RP].val                                    \
 117         = (unsigned long)&(sc_->sc_ip) - (CONTEXT)->psp;                \
 118       (FS)->curr.reg[UNW_REG_RP].when = -1;                             \
 119                                                                         \
 120       goto SUCCESS;                                                     \
 121     }
 122 #endif /* IN_LIBGCC2 */