C++ support changes:
Generate .ctors and .dtors sections which contain the contructor and deconstructor function addresses. Use .init and .fini sections to call the functions to call those functions. Include the crtbegin and crtend object files which perform those calls.
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mhitch
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@ -131,9 +131,29 @@ Boston, MA 02111-1307, USA. */
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#define LIB_SPEC "%{!p:%{!pg:-lc}}%{p:-lc_p}%{pg:-lc_p}"
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#undef LIB_SPEC
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#define LIB_SPEC "%{p:-lprof1} %{pg:-lprof1} -lc /usr/lib/crtn.o%s"
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#define LIB_SPEC "%{p:-lprof1} %{pg:-lprof1} -lc%s"
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/* Provide a STARTFILE_SPEC appropriate for NetBSD. Here we add
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the crtbegin.o file (see crtstuff.c) which provides part of the
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support for getting C++ file-scope static object constructed
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before entering `main'. */
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#undef STARTFILE_SPEC
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#define STARTFILE_SPEC \
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"%{!shared:%{pg:gcrt1.o%s}%{!pg:%{p:mcrt1.o%s libprof1.a%s}%{!p:crt1.o%s}}}"
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"%{!shared: \
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%{pg:gcrt0.o%s} \
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%{!pg: \
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%{p:gcrt0.o%s} \
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%{!p:crt0.o%s}}} \
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%{!shared:crtbegin.o%s} %{shared:crtbeginS.o%s}"
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/* Provide a ENDFILE_SPEC appropriate for NetBSD. Here we tack on
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the file which provides part of the support for getting C++
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file-scope static object deconstructed after exiting `main' */
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#undef ENDFILE_SPEC
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#define ENDFILE_SPEC \
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"%{!shared:crtend.o%s} %{shared:crtendS.o%s}"
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#ifndef MACHINE_TYPE
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#define MACHINE_TYPE "NetBSD/mips"
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@ -302,7 +322,127 @@ do { \
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} \
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} while (0)
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/* Since gas and gld are standard on NetBSD, we don't need these */
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/* Since gas is standard on NetBSD, we don't need this */
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#undef ASM_FINAL_SPEC
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#undef STARTFILE_SPEC
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/* Stuff for constructors. Start here. */
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/* Define the pseudo-ops used to switch to the .ctors and .dtors sections.
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Note that we want to give these sections the SHF_WRITE attribute
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because these sections will actually contain data (i.e. tables of
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addresses of functions in the current root executable or shared library
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file) and, in the case of a shared library, the relocatable addresses
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will have to be properly resolved/relocated (and then written into) by
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the dynamic linker when it actually attaches the given shared library
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to the executing process. (Note that on SVR4, you may wish to use the
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`-z text' option to the ELF linker, when building a shared library, as
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an additional check that you are doing everything right. But if you do
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use the `-z text' option when building a shared library, you will get
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errors unless the .ctors and .dtors sections are marked as writable
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via the SHF_WRITE attribute.) */
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#define CONST_SECTION_ASM_OP_32 "\t.rdata"
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#define CONST_SECTION_ASM_OP_64 ".section\t.rodata"
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#define CTORS_SECTION_ASM_OP ".section\t.ctors,\"aw\""
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#define DTORS_SECTION_ASM_OP ".section\t.dtors,\"aw\""
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/* On svr4, we *do* have support for the .init and .fini sections, and we
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can put stuff in there to be executed before and after `main'. We let
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crtstuff.c and other files know this by defining the following symbols.
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The definitions say how to change sections to the .init and .fini
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sections. This is the same for all known svr4 assemblers. */
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#define INIT_SECTION_ASM_OP ".section\t.init"
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#define FINI_SECTION_ASM_OP ".section\t.fini"
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/* This is the pseudo-op used to generate a 32-bit word of data with a
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specific value in some section. This is the same for all known svr4
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assemblers. */
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#define INT_ASM_OP ".word"
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/* A default list of other sections which we might be "in" at any given
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time. For targets that use additional sections (e.g. .tdesc) you
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should override this definition in the target-specific file which
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includes this file. */
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#undef EXTRA_SECTIONS
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#define EXTRA_SECTIONS in_sdata, in_rdata, in_const, in_ctors, in_dtors, in_bss
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/* A default list of extra section function definitions. For targets
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that use additional sections (e.g. .tdesc) you should override this
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definition in the target-specific file which includes this file. */
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/* ??? rdata_section is now same as svr4 const_section. */
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#undef EXTRA_SECTION_FUNCTIONS
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#define EXTRA_SECTION_FUNCTIONS \
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void \
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sdata_section () \
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{ \
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if (in_section != in_sdata) \
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{ \
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fprintf (asm_out_file, "%s\n", SDATA_SECTION_ASM_OP); \
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in_section = in_sdata; \
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} \
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} \
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\
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void \
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rdata_section () \
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{ \
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if (in_section != in_rdata) \
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{ \
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if (mips_isa >= 3) \
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fprintf (asm_out_file, "%s\n", CONST_SECTION_ASM_OP_64); \
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else \
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fprintf (asm_out_file, "%s\n", CONST_SECTION_ASM_OP_32); \
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in_section = in_rdata; \
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} \
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} \
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CTORS_SECTION_FUNCTION \
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DTORS_SECTION_FUNCTION
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#define CTORS_SECTION_FUNCTION \
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void \
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ctors_section () \
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{ \
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if (in_section != in_ctors) \
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{ \
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fprintf (asm_out_file, "%s\n", CTORS_SECTION_ASM_OP); \
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in_section = in_ctors; \
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} \
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}
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#define DTORS_SECTION_FUNCTION \
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void \
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dtors_section () \
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{ \
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if (in_section != in_dtors) \
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{ \
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fprintf (asm_out_file, "%s\n", DTORS_SECTION_ASM_OP); \
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in_section = in_dtors; \
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} \
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}
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#define OBJECT_FORMAT_ELF
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/* A C statement (sans semicolon) to output an element in the table of
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global constructors. */
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#define ASM_OUTPUT_CONSTRUCTOR(FILE,NAME) \
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do { \
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ctors_section (); \
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fprintf (FILE, "\t%s\t ", INT_ASM_OP); \
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assemble_name (FILE, NAME); \
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fprintf (FILE, "\n"); \
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} while (0)
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/* A C statement (sans semicolon) to output an element in the table of
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global destructors. */
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#define ASM_OUTPUT_DESTRUCTOR(FILE,NAME) \
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do { \
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dtors_section (); \
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fprintf (FILE, "\t%s\t ", INT_ASM_OP); \
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assemble_name (FILE, NAME); \
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fprintf (FILE, "\n"); \
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} while (0)
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