1 /* Definitions of target machine for GNU compiler, for DEC Alpha on OSF/1.
2 Copyright (C) 1992, 93, 94, 95, 96, 97, 1998 Free Software Foundation, Inc.
3 Contributed by Richard Kenner (kenner@vlsi1.ultra.nyu.edu)
5 This file is part of GNU CC.
7 GNU CC is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 GNU CC is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU CC; see the file COPYING. If not, write to
19 the Free Software Foundation, 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
22 /* As of OSF 4.0, as can subtract adjacent labels. */
24 #undef TARGET_AS_CAN_SUBTRACT_LABELS
25 #define TARGET_AS_CAN_SUBTRACT_LABELS 1
27 /* Names to predefine in the preprocessor for this target machine. */
29 #define CPP_PREDEFINES "\
30 -Dunix -D__osf__ -D_LONGLONG -DSYSTYPE_BSD \
31 -D_SYSTYPE_BSD -Asystem(unix) -Asystem(xpg4)"
33 /* Accept DEC C flags for multithreaded programs. We use _PTHREAD_USE_D4
34 instead of PTHREAD_USE_D4 since both have the same effect and the former
35 doesn't invade the users' namespace. */
37 #undef CPP_SUBTARGET_SPEC
38 #define CPP_SUBTARGET_SPEC \
39 "%{pthread|threads:-D_REENTRANT} %{threads:-D_PTHREAD_USE_D4}"
41 /* Under OSF4, -p and -pg require -lprof1, and -lprof1 requires -lpdf. */
44 "%{p|pg:-lprof1%{pthread|threads:_r} -lpdf} %{a:-lprof2} \
45 %{threads: -lpthreads} %{pthread|threads: -lpthread -lmach -lexc} -lc"
47 /* Pass "-G 8" to ld because Alpha's CC does. Pass -O3 if we are
48 optimizing, -O1 if we are not. Pass -shared, -non_shared or
49 -call_shared as appropriate. Also pass -pg. */
51 "-G 8 %{O*:-O3} %{!O*:-O1} %{static:-non_shared} \
52 %{!static:%{shared:-shared} %{!shared:-call_shared}} %{pg} %{taso} \
55 #define STARTFILE_SPEC \
56 "%{!shared:%{pg:gcrt0.o%s}%{!pg:%{p:mcrt0.o%s}%{!p:crt0.o%s}}}"
58 #define MD_STARTFILE_PREFIX "/usr/lib/cmplrs/cc/"
60 #define ASM_FILE_START(FILE) \
62 alpha_write_verstamp (FILE); \
63 fprintf (FILE, "\t.set noreorder\n"); \
64 fprintf (FILE, "\t.set volatile\n"); \
65 fprintf (FILE, "\t.set noat\n"); \
66 if (TARGET_SUPPORT_ARCH) \
67 fprintf (FILE, "\t.arch %s\n", \
68 alpha_cpu == PROCESSOR_EV6 ? "ev6" \
69 : (alpha_cpu == PROCESSOR_EV5 \
70 ? (TARGET_MAX ? "pca56" : TARGET_BWX ? "ev56" : "ev5") \
73 ASM_OUTPUT_SOURCE_FILENAME (FILE, main_input_filename); \
76 /* No point in running CPP on our assembler output. */
77 #if ((TARGET_DEFAULT | TARGET_CPU_DEFAULT) & MASK_GAS) != 0
78 /* Don't pass -g to GNU as, because some versions don't accept this option. */
79 #define ASM_SPEC "%{malpha-as:-g} -nocpp %{pg}"
81 /* In OSF/1 v3.2c, the assembler by default does not output file names which
82 causes mips-tfile to fail. Passing -g to the assembler fixes this problem.
83 ??? Strictly speaking, we need -g only if the user specifies -g. Passing
84 it always means that we get slightly larger than necessary object files
85 if the user does not specify -g. If we don't pass -g, then mips-tfile
86 will need to be fixed to work in this case. Pass -O0 since some
87 optimization are broken and don't help us anyway. */
88 #define ASM_SPEC "%{!mgas:-g} -nocpp %{pg} -O0"
91 /* Specify to run a post-processor, mips-tfile after the assembler
92 has run to stuff the ecoff debug information into the object file.
93 This is needed because the Alpha assembler provides no way
94 of specifying such information in the assembly file. */
96 #if ((TARGET_DEFAULT | TARGET_CPU_DEFAULT) & MASK_GAS) != 0
98 #define ASM_FINAL_SPEC "\
99 %{malpha-as: %{!mno-mips-tfile: \
100 \n mips-tfile %{v*: -v} \
102 %{!K: %{save-temps: -I %b.o~}} \
103 %{c:%W{o*}%{!o*:-o %b.o}}%{!c:-o %U.o} \
104 %{.s:%i} %{!.s:%g.s}}}"
107 #define ASM_FINAL_SPEC "\
108 %{!mgas: %{!mno-mips-tfile: \
109 \n mips-tfile %{v*: -v} \
111 %{!K: %{save-temps: -I %b.o~}} \
112 %{c:%W{o*}%{!o*:-o %b.o}}%{!c:-o %U.o} \
113 %{.s:%i} %{!.s:%g.s}}}"
117 /* Indicate that we have a stamp.h to use. */
118 #ifndef CROSS_COMPILE
119 #define HAVE_STAMP_H 1
122 /* Attempt to turn on access permissions for the stack. */
124 #define TRANSFER_FROM_TRAMPOLINE \
126 __enable_execute_stack (addr) \
129 long size = getpagesize (); \
130 long mask = ~(size-1); \
131 char *page = (char *) (((long) addr) & mask); \
132 char *end = (char *) ((((long) (addr + TRAMPOLINE_SIZE)) & mask) + size); \
134 /* 7 is PROT_READ | PROT_WRITE | PROT_EXEC */ \
135 if (mprotect (page, end - page, 7) < 0) \
136 perror ("mprotect of trampoline code"); \