-/* svr4.h -- operating system specific defines to be used when
- targeting GCC for some generic System V Release 4 system.
- Copyright (C) 1991, 1994 Free Software Foundation, Inc.
- Contributed by Ron Guilmette (rfg@netcom.com).
+/* Operating system specific defines to be used when targeting GCC for some
+ generic System V Release 4 system.
+ Copyright (C) 1991, 1994, 1995, 1996 Free Software Foundation, Inc.
+ Contributed by Ron Guilmette (rfg@segfault.us.com).
This file is part of GNU CC.
You should have received a copy of the GNU General Public License
along with GNU CC; see the file COPYING. If not, write to
-the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
+the Free Software Foundation, 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA.
To use this file, make up a file with a name like:
/* Provide an ASM_SPEC appropriate for svr4. Here we try to support as
many of the specialized svr4 assembler options as seems reasonable,
given that there are certain options which we can't (or shouldn't)
- support directly due to the fact that they conflict with other options
+ support directly due to the fact that they conflict with other options
for other svr4 tools (e.g. ld) or with other options for GCC itself.
For example, we don't support the -o (output file) or -R (remove
input file) options because GCC already handles these things. We
/* Under svr4, the normal location of the `ld' and `as' programs is the
/usr/ccs/bin directory. */
+#ifndef CROSS_COMPILE
#undef MD_EXEC_PREFIX
#define MD_EXEC_PREFIX "/usr/ccs/bin/"
+#endif
/* Under svr4, the normal location of the various *crt*.o files is the
/usr/ccs/lib directory. */
+#ifndef CROSS_COMPILE
#undef MD_STARTFILE_PREFIX
#define MD_STARTFILE_PREFIX "/usr/ccs/lib/"
+#endif
/* Provide a LIB_SPEC appropriate for svr4. Here we tack on the default
- standard C library (unless we are building a shared library) followed by
- our own magical crtend.o file (see crtstuff.c) which provides part of
- the support for getting C++ file-scope static object constructed before
+ standard C library (unless we are building a shared library). */
+
+#undef LIB_SPEC
+#define LIB_SPEC "%{!shared:%{!symbolic:-lc}}"
+
+/* Provide an ENDFILE_SPEC appropriate for svr4. Here we tack on our own
+ magical crtend.o file (see crtstuff.c) which provides part of the
+ support for getting C++ file-scope static object constructed before
entering `main', followed by the normal svr3/svr4 "finalizer" file,
which is either `gcrtn.o' or `crtn.o'. */
-#undef LIB_SPEC
-#define LIB_SPEC \
- "%{!shared:%{!symbolic:-lc}} \
- crtend.o%s \
- %{!shared:%{!symbolic:%{pg:gcrtn.o}%{!pg:crtn.o%s}}}"
+#undef ENDFILE_SPEC
+#define ENDFILE_SPEC "crtend.o%s %{pg:gcrtn.o}%{!pg:crtn.o%s}"
/* Provide a LINK_SPEC appropriate for svr4. Here we provide support
for the special GCC options -static, -shared, and -symbolic which
not being done. */
#undef LINK_SPEC
+#ifdef CROSS_COMPILE
#define LINK_SPEC "%{h*} %{V} %{v:%{!V:-V}} \
%{b} %{Wl,*:%*} \
%{static:-dn -Bstatic} \
- %{shared:-G -dy} \
- %{symbolic:-Bsymbolic -G -dy} \
+ %{shared:-G -dy -z text %{!h*:%{o*:-h %*}}} \
+ %{symbolic:-Bsymbolic -G -dy -z text %{!h*:%{o*:-h %*}}} \
+ %{G:-G} \
+ %{YP,*} \
+ %{Qy:} %{!Qn:-Qy}"
+#else
+#define LINK_SPEC "%{h*} %{V} %{v:%{!V:-V}} \
+ %{b} %{Wl,*:%*} \
+ %{static:-dn -Bstatic} \
+ %{shared:-G -dy -z text %{!h*:%{o*:-h %*}}} \
+ %{symbolic:-Bsymbolic -G -dy -z text %{!h*:%{o*:-h %*}}} \
%{G:-G} \
%{YP,*} \
%{!YP,*:%{p:-Y P,/usr/ccs/lib/libp:/usr/lib/libp:/usr/ccs/lib:/usr/lib} \
%{!p:-Y P,/usr/ccs/lib:/usr/lib}} \
%{Qy:} %{!Qn:-Qy}"
+#endif
/* Gcc automatically adds in one of the files /usr/ccs/lib/values-Xc.o,
/usr/ccs/lib/values-Xa.o, or /usr/ccs/lib/values-Xt.o for each final
#undef STARTFILE_SPEC
#define STARTFILE_SPEC "%{!shared: \
%{!symbolic: \
- %{pg:gcrt1.o%s}%{!pg:%{p:mcrt1.o%s}%{!p:crt1.o%s}} \
- %{pg:gcrti.o%s}%{!pg:crti.o%s} \
- %{ansi:values-Xc.o%s} \
- %{!ansi: \
- %{traditional:values-Xt.o%s} \
- %{!traditional:values-Xa.o%s}}}} crtbegin.o%s"
+ %{pg:gcrt1.o%s}%{!pg:%{p:mcrt1.o%s}%{!p:crt1.o%s}}}}\
+ %{pg:gcrti.o%s}%{!pg:crti.o%s} \
+ %{ansi:values-Xc.o%s} \
+ %{!ansi: \
+ %{traditional:values-Xt.o%s} \
+ %{!traditional:values-Xa.o%s}} \
+ crtbegin.o%s"
/* Attach a special .ident directive to the end of the file to identify
the version of GCC which compiled this code. The format of the
#define DBX_DEBUGGING_INFO
+/* When generating stabs debugging, use N_BINCL entries. */
+
+#define DBX_USE_BINCL
+
/* Use DWARF debugging info by default. */
#ifndef PREFERRED_DEBUGGING_TYPE
do \
{ \
static int sym_lineno = 1; \
- fprintf (file, ".stabn 68,0,%d,.LM%d-%s\n.LM%d:\n", \
- line, sym_lineno, \
- XSTR (XEXP (DECL_RTL (current_function_decl), 0), 0), \
- sym_lineno); \
+ fprintf (file, ".stabn 68,0,%d,.LM%d-", \
+ line, sym_lineno); \
+ assemble_name (file, \
+ XSTR (XEXP (DECL_RTL (current_function_decl), 0), 0));\
+ fprintf (file, "\n.LM%d:\n", sym_lineno); \
sym_lineno += 1; \
} \
while (0)
#define DBX_FUNCTION_FIRST
+/* Generate a blank trailing N_SO to mark the end of the .o file, since
+ we can't depend upon the linker to mark .o file boundaries with
+ embedded stabs. */
+
+#define DBX_OUTPUT_MAIN_SOURCE_FILE_END(FILE, FILENAME) \
+ fprintf (FILE, \
+ "\t.text\n\t.stabs \"\",%d,0,0,.Letext\n.Letext:\n", N_SO)
+
/* Define the actual types of some ANSI-mandated types. (These
definitions should work for most SVR4 systems). */
ASM_OUTPUT_ALIGNED_COMMON (FILE, NAME, SIZE, ALIGN); \
} while (0)
+/* Biggest alignment supported by the object file format of this
+ machine. Use this macro to limit the alignment which can be
+ specified using the `__attribute__ ((aligned (N)))' construct. If
+ not defined, the default value is `BIGGEST_ALIGNMENT'. */
+
+#define MAX_OFILE_ALIGNMENT (32768*8)
+
/* This is the pseudo-op used to generate a 32-bit word of data with a
specific value in some section. This is the same for all known svr4
assemblers. */
#define USE_CONST_SECTION 1
#define CONST_SECTION_ASM_OP ".section\t.rodata"
-#define CTORS_SECTION_ASM_OP ".section\t.ctors,\"a\",@progbits"
-#define DTORS_SECTION_ASM_OP ".section\t.dtors,\"a\",@progbits"
-/* On svr4, we *do* have support for the .init section, and we can put
- stuff in there to be executed before `main'. We let crtstuff.c and
- other files know this by defining the following symbol. The definition
- says how to change sections to the .init section. This is the same
- for all know svr4 assemblers. */
+/* Define the pseudo-ops used to switch to the .ctors and .dtors sections.
+
+ Note that we want to give these sections the SHF_WRITE attribute
+ because these sections will actually contain data (i.e. tables of
+ addresses of functions in the current root executable or shared library
+ file) and, in the case of a shared library, the relocatable addresses
+ will have to be properly resolved/relocated (and then written into) by
+ the dynamic linker when it actually attaches the given shared library
+ to the executing process. (Note that on SVR4, you may wish to use the
+ `-z text' option to the ELF linker, when building a shared library, as
+ an additional check that you are doing everything right. But if you do
+ use the `-z text' option when building a shared library, you will get
+ errors unless the .ctors and .dtors sections are marked as writable
+ via the SHF_WRITE attribute.) */
+
+#define CTORS_SECTION_ASM_OP ".section\t.ctors,\"aw\""
+#define DTORS_SECTION_ASM_OP ".section\t.dtors,\"aw\""
+
+/* On svr4, we *do* have support for the .init and .fini sections, and we
+ can put stuff in there to be executed before and after `main'. We let
+ crtstuff.c and other files know this by defining the following symbols.
+ The definitions say how to change sections to the .init and .fini
+ sections. This is the same for all known svr4 assemblers. */
#define INIT_SECTION_ASM_OP ".section\t.init"
+#define FINI_SECTION_ASM_OP ".section\t.fini"
/* A default list of other sections which we might be "in" at any given
time. For targets that use additional sections (e.g. .tdesc) you
} \
}
-/* Switch into a generic section.
- This is currently only used to support section attributes. */
-#define ASM_OUTPUT_SECTION(FILE, NAME) \
- fprintf (FILE, ".section\t%s,\"a\",@progbits\n", NAME)
+/*
+ * Switch into a generic section.
+ *
+ * We make the section read-only and executable for a function decl,
+ * read-only for a const data decl, and writable for a non-const data decl.
+ *
+ * If the section has already been defined, we must not
+ * emit the attributes here. The SVR4 assembler does not
+ * recognize section redefinitions.
+ * If DECL is NULL, no attributes are emitted.
+ */
+#define ASM_OUTPUT_SECTION_NAME(FILE, DECL, NAME) \
+do { \
+ static struct section_info \
+ { \
+ struct section_info *next; \
+ char *name; \
+ enum sect_enum {SECT_RW, SECT_RO, SECT_EXEC} type; \
+ } *sections; \
+ struct section_info *s; \
+ char *mode; \
+ enum sect_enum type; \
+ \
+ for (s = sections; s; s = s->next) \
+ if (!strcmp (NAME, s->name)) \
+ break; \
+ \
+ if (DECL) \
+ { \
+ if (TREE_CODE (DECL) == FUNCTION_DECL) \
+ type = SECT_EXEC, mode = "ax"; \
+ else if (TREE_READONLY(DECL)) \
+ type = SECT_RO, mode = "a"; \
+ else \
+ type = SECT_RW, mode = "aw"; \
+ } \
+ \
+ if (s == 0 && DECL) \
+ { \
+ s = (struct section_info *) xmalloc (sizeof (struct section_info)); \
+ s->name = xmalloc ((strlen (NAME) + 1) * sizeof (*NAME)); \
+ strcpy (s->name, NAME); \
+ s->type = type; \
+ s->next = sections; \
+ sections = s; \
+ fprintf (FILE, ".section\t%s,\"%s\",@progbits\n", NAME, mode); \
+ } \
+ else \
+ { \
+ if (DECL && s->type != type) \
+ error_with_decl (DECL, "%s causes a section type conflict"); \
+ \
+ fprintf (FILE, ".section\t%s\n", NAME); \
+ } \
+} while (0)
/* A C statement (sans semicolon) to output an element in the table of
global constructors. */
#define TYPE_ASM_OP ".type"
#define SIZE_ASM_OP ".size"
-#define WEAK_ASM_OP ".weak"
+
+/* This is how we tell the assembler that a symbol is weak. */
+
+#define ASM_WEAKEN_LABEL(FILE,NAME) \
+ do { fputs ("\t.weak\t", FILE); assemble_name (FILE, NAME); \
+ fputc ('\n', FILE); } while (0)
/* The following macro defines the format used to output the second
operand of the .type assembler directive. Different svr4 assemblers
fprintf ((FILE), "\"\n"); \
} \
while (0)
+
+/* All SVR4 targets use the ELF object file format. */
+#define OBJECT_FORMAT_ELF
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