1 /* Definitions of target machine for GNU compiler, 2 for Alpha Linux-based GNU systems. 3 Copyright (C) 1996, 1997, 1998, 2002 Free Software Foundation, Inc. 4 Contributed by Richard Henderson. 5 6 This file is part of GNU CC. 7 8 GNU CC is free software; you can redistribute it and/or modify 9 it under the terms of the GNU General Public License as published by 10 the Free Software Foundation; either version 2, or (at your option) 11 any later version. 12 13 GNU CC is distributed in the hope that it will be useful, 14 but WITHOUT ANY WARRANTY; without even the implied warranty of 15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 GNU General Public License for more details. 17 18 You should have received a copy of the GNU General Public License 19 along with GNU CC; see the file COPYING. If not, write to 20 the Free Software Foundation, 59 Temple Place - Suite 330, 21 Boston, MA 02111-1307, USA. */ 22 23 #undef TARGET_DEFAULT 24 #define TARGET_DEFAULT (MASK_FP | MASK_FPREGS | MASK_GAS) 25 26 #define TARGET_OS_CPP_BUILTINS() \ 27 do { \ 28 builtin_define ("__gnu_linux__"); \ 29 builtin_define ("_LONGLONG"); \ 30 builtin_define_std ("linux"); \ 31 builtin_define_std ("unix"); \ 32 builtin_assert ("system=linux"); \ 33 /* The GNU C++ standard library requires this. */ \ 34 if (c_language == clk_cplusplus) \ 35 builtin_define ("_GNU_SOURCE"); \ 36 } while (0) 37 38 #undef LIB_SPEC 39 #define LIB_SPEC \ 40 "%{pthread:-lpthread} \ 41 %{shared:-lc} \ 42 %{!shared: %{profile:-lc_p}%{!profile:-lc}}" 43 44 /* Show that we need a GP when profiling. */ 45 #undef TARGET_PROFILING_NEEDS_GP 46 #define TARGET_PROFILING_NEEDS_GP 1 47 48 /* Don't care about faults in the prologue. */ 49 #undef TARGET_CAN_FAULT_IN_PROLOGUE 50 #define TARGET_CAN_FAULT_IN_PROLOGUE 1 51 52 /* OS fixes up EV5 data fault on prefetch. */ 53 #undef TARGET_FIXUP_EV5_PREFETCH 54 #define TARGET_FIXUP_EV5_PREFETCH 1 55 56 #undef WCHAR_TYPE 57 #define WCHAR_TYPE "int" 58 59 /* Define this so that all GNU/Linux targets handle the same pragmas. */ 60 #define HANDLE_PRAGMA_PACK_PUSH_POP 61 62 #define TARGET_HAS_F_SETLKW 63 64 #define LINK_GCC_C_SEQUENCE_SPEC \ 65 "%{static:--start-group} %G %L %{static:--end-group}%{!static:%G}" 66 67 /* Do code reading to identify a signal frame, and set the frame 68 state data appropriately. See unwind-dw2.c for the structs. */ 69 70 #ifdef IN_LIBGCC2 71 #include <signal.h> 72 #include <sys/ucontext.h> 73 #endif 74 75 #define MD_FALLBACK_FRAME_STATE_FOR(CONTEXT, FS, SUCCESS) \ 76 do { \ 77 unsigned int *pc_ = (CONTEXT)->ra; \ 78 struct sigcontext *sc_; \ 79 long new_cfa_, i_; \ 80 \ 81 if (pc_[0] != 0x47fe0410 /* mov $30,$16 */ \ 82 || pc_[2] != 0x00000083 /* callsys */) \ 83 break; \ 84 if ((CONTEXT)->cfa == 0) \ 85 break; \ 86 if (pc_[1] == 0x201f0067) /* lda $0,NR_sigreturn */ \ 87 sc_ = (CONTEXT)->cfa; \ 88 else if (pc_[1] == 0x201f015f) /* lda $0,NR_rt_sigreturn */ \ 89 { \ 90 struct rt_sigframe { \ 91 struct siginfo info; \ 92 struct ucontext uc; \ 93 } *rt_ = (CONTEXT)->cfa; \ 94 sc_ = &rt_->uc.uc_mcontext; \ 95 } \ 96 else \ 97 break; \ 98 new_cfa_ = sc_->sc_regs[30]; \ 99 (FS)->cfa_how = CFA_REG_OFFSET; \ 100 (FS)->cfa_reg = 30; \ 101 (FS)->cfa_offset = new_cfa_ - (long) (CONTEXT)->cfa; \ 102 for (i_ = 0; i_ < 30; ++i_) \ 103 { \ 104 (FS)->regs.reg[i_].how = REG_SAVED_OFFSET; \ 105 (FS)->regs.reg[i_].loc.offset \ 106 = (long)&sc_->sc_regs[i_] - new_cfa_; \ 107 } \ 108 for (i_ = 0; i_ < 31; ++i_) \ 109 { \ 110 (FS)->regs.reg[i_+32].how = REG_SAVED_OFFSET; \ 111 (FS)->regs.reg[i_+32].loc.offset \ 112 = (long)&sc_->sc_fpregs[i_] - new_cfa_; \ 113 } \ 114 (FS)->regs.reg[64].how = REG_SAVED_OFFSET; \ 115 (FS)->regs.reg[64].loc.offset = (long)&sc_->sc_pc - new_cfa_; \ 116 (FS)->retaddr_column = 64; \ 117 goto SUCCESS; \ 118 } while (0) 119