PR linker/4844
* genscript.sh: Add support for generating a .xa script for use with the --auto-import option. * ld.texinfo: Document the new behaviour of the --auto-import option. * ldint.texinfo: Document new script generation. * emulparams/i386pe.sh (GENERATE_AUTO_IMPORT): Define. * emulparams/i386pe_posix.sh (GENERATE_AUTO_IMPORT): Define. * emulparams/i386pep.sh (GENERATE_AUTO_IMPORT): Define. * emultemp/pe.em (..._get_script): Support the use of the auto import script. * scripttempl/pe.sc: Put the .rdata input sections into the .data output section when creating an auto import script. * scripttempl/pep.sc: Likewise.
This commit is contained in:
Nick Clifton
parent
1576798ef8
commit
e2a83dd0ec
17
ld/ChangeLog
17
ld/ChangeLog
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@ -1,3 +1,20 @@
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2007-10-01 Nick Clifton <nickc@redhat.com>
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PR linker/4844
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* genscript.sh: Add support for generating a .xa script for use
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with the --auto-import option.
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* ld.texinfo: Document the new behaviour of the --auto-import
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option.
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* ldint.texinfo: Document new script generation.
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* emulparams/i386pe.sh (GENERATE_AUTO_IMPORT): Define.
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* emulparams/i386pe_posix.sh (GENERATE_AUTO_IMPORT): Define.
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* emulparams/i386pep.sh (GENERATE_AUTO_IMPORT): Define.
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* emultemp/pe.em (..._get_script): Support the use of the auto
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import script.
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* scripttempl/pe.sc: Put the .rdata input sections into the .data
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output section when creating an auto import script.
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* scripttempl/pep.sc: Likewise.
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2007-09-26 Brian Watt <bwatt@us.ibm.com>
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* emultempl/spu_ovl.S: Add debug printf code.
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@ -7,3 +7,4 @@ ENTRY="_mainCRTStartup"
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SUBSYSTEM=PE_DEF_SUBSYSTEM
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INITIAL_SYMBOL_CHAR=\"_\"
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TARGET_PAGE_SIZE=0x1000
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GENERATE_AUTO_IMPORT_SCRIPT=1
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@ -8,3 +8,4 @@ SUBSYSTEM=7
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EXECUTABLE_NAME=a.out
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INITIAL_SYMBOL_CHAR=\"_\"
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TARGET_PAGE_SIZE=0x1000
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GENERATE_AUTO_IMPORT_SCRIPT=1
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@ -7,3 +7,4 @@ ENTRY="_mainCRTStartup"
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SUBSYSTEM=PE_DEF_SUBSYSTEM
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INITIAL_SYMBOL_CHAR=\"_\"
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TARGET_PAGE_SIZE=0x1000
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GENERATE_AUTO_IMPORT_SCRIPT=1
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@ -1891,6 +1891,10 @@ echo ' ; else if (!config.text_read_only) return' >> e${EMULATION_NAME}.c
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sed $sc ldscripts/${EMULATION_NAME}.xbn >> e${EMULATION_NAME}.c
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echo ' ; else if (!config.magic_demand_paged) return' >> e${EMULATION_NAME}.c
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sed $sc ldscripts/${EMULATION_NAME}.xn >> e${EMULATION_NAME}.c
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if test -n "$GENERATE_AUTO_IMPORT_SCRIPT" ; then
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echo ' ; else if (link_info.pei386_auto_import == 1) return' >> e${EMULATION_NAME}.c
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sed $sc ldscripts/${EMULATION_NAME}.xa >> e${EMULATION_NAME}.c
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fi
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echo ' ; else return' >> e${EMULATION_NAME}.c
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sed $sc ldscripts/${EMULATION_NAME}.x >> e${EMULATION_NAME}.c
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echo '; }' >> e${EMULATION_NAME}.c
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@ -1659,6 +1659,10 @@ echo ' ; else if (!config.text_read_only) return' >> e${EMULATION_NAME}.c
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sed $sc ldscripts/${EMULATION_NAME}.xbn >> e${EMULATION_NAME}.c
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echo ' ; else if (!config.magic_demand_paged) return' >> e${EMULATION_NAME}.c
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sed $sc ldscripts/${EMULATION_NAME}.xn >> e${EMULATION_NAME}.c
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if test -n "$GENERATE_AUTO_IMPORT_SCRIPT" ; then
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echo ' ; else if (link_info.pei386_auto_import == 1) return' >> e${EMULATION_NAME}.c
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sed $sc ldscripts/${EMULATION_NAME}.xa >> e${EMULATION_NAME}.c
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fi
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echo ' ; else return' >> e${EMULATION_NAME}.c
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sed $sc ldscripts/${EMULATION_NAME}.x >> e${EMULATION_NAME}.c
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echo '; }' >> e${EMULATION_NAME}.c
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@ -63,6 +63,7 @@
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# sun3.xc [used when the linker is invoked with "-z combreloc"]
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# sun3.xsc [used when the linker is invoked with "--shared"]
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# sun3.xdc [used when the linker is invoked with "-pie"]
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# sun3.xa [used when the linker is invoked with "--enable-auto-import"]
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#
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# It also produced the C source file:
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#
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@ -386,6 +387,16 @@ if test -n "$GENERATE_PIE_SCRIPT"; then
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unset CREATE_PIE
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fi
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if test -n "$GENERATE_AUTO_IMPORT_SCRIPT"; then
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LD_FLAG=auto_import
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DATA_ALIGNMENT=${DATA_ALIGNMENT_}
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(
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echo "/* Script for ld --enable-auto-import: Like the default script except read only data is placed into .data */"
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. ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME}
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. ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
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) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xa
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fi
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case " $EMULATION_LIBPATH " in
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*" ${EMULATION_NAME} "*) COMPILE_IN=true;;
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esac
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@ -1568,15 +1568,15 @@ at link time. Searching @option{-rpath} in this way is only supported
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by native linkers and cross linkers which have been configured with
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the @option{--with-sysroot} option.
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@item
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On an ELF system, if the @option{-rpath} and @code{rpath-link} options
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were not used, search the contents of the environment variable
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@code{LD_RUN_PATH}. It is for the native linker only.
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On an ELF system, for native linkers, if the @option{-rpath} and
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@option{-rpath-link} options were not used, search the contents of the
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environment variable @code{LD_RUN_PATH}.
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@item
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On SunOS, if the @option{-rpath} option was not used, search any
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directories specified using @option{-L} options.
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@item
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For a native linker, the contents of the environment variable
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@code{LD_LIBRARY_PATH}.
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For a native linker, the search the contents of the environment
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variable @code{LD_LIBRARY_PATH}.
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@item
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For a native ELF linker, the directories in @code{DT_RUNPATH} or
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@code{DT_RPATH} of a shared library are searched for shared
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@ -2220,6 +2220,12 @@ building the import libraries with those DATA exports. Note: Use of the
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to be made writable. This does not conform to the PE-COFF format
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specification published by Microsoft.
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Note - use of the 'auto-import' extension will also cause read only
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data which would normally be placed into the .rdata section to be
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placed into the .data section instead. This is in order to work
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around a problem with consts that is described here:
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http://www.cygwin.com/ml/cygwin/2004-09/msg01101.html
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Using 'auto-import' generally will 'just work' -- but sometimes you may
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see this message:
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@ -237,7 +237,7 @@ If @code{SCRIPT_NAME} is set to @var{script}, @code{genscripts.sh} will
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invoke @file{scripttempl/@var{script}.sc}.
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The @file{genscripts.sh} script will invoke the @file{scripttempl}
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script 5 to 8 times. Each time it will set the shell variable
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script 5 to 9 times. Each time it will set the shell variable
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@code{LD_FLAG} to a different value. When the linker is run, the
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options used will direct it to select a particular script. (Script
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selection is controlled by the @code{get_script} emulation entry point;
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@ -292,6 +292,13 @@ this value if @code{GENERATE_COMBRELOC_SCRIPT} is defined in the
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The @file{emultempl} script must arrange to use this script at the
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appropriate time, normally when the linker is invoked with the @code{-shared
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-z combreloc} option. The output has an extension of @file{.xsc}.
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@item auto_import
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The @file{scripttempl} script is only invoked with @code{LD_FLAG} set to
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this value if @code{GENERATE_AUTO_IMPORT_SCRIPT} is defined in the
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@file{emulparams} file. The @file{emultempl} script must arrange to
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use this script at the appropriate time, normally when the linker is
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invoked with the @code{--enable-auto-import} option. The output has
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an extension of @file{.xa}.
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@end table
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Besides the shell variables set by the @file{emulparams} script, and the
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@ -13,8 +13,16 @@ fi
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# use grouped sections instead).
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if test "${RELOCATING}"; then
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R_TEXT='*(SORT(.text$*))'
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R_DATA='*(SORT(.data$*))'
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R_RDATA='*(SORT(.rdata$*))'
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if test "x$LD_FLAG" = "xauto_import" ; then
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R_DATA='*(SORT(.data$*))
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*(.rdata)
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*(SORT(.rdata$*))'
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R_RDATA=''
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else
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R_DATA='*(SORT(.data$*))'
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R_RDATA='*(.rdata)
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*(SORT(.rdata$*))'
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fi
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R_IDATA='
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SORT(*)(.idata$2)
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SORT(*)(.idata$3)
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@ -37,7 +45,7 @@ if test "${RELOCATING}"; then
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else
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R_TEXT=
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R_DATA=
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R_RDATA=
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R_RDATA='*(.rdata)'
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R_IDATA=
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R_CRT=
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R_RSRC=
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@ -93,7 +101,6 @@ SECTIONS
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.rdata ${RELOCATING+BLOCK(__section_alignment__)} :
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{
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*(.rdata)
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${R_RDATA}
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${RELOCATING+ *(.eh_frame)}
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${RELOCATING+___RUNTIME_PSEUDO_RELOC_LIST__ = .;}
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@ -13,8 +13,16 @@ fi
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# use grouped sections instead).
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if test "${RELOCATING}"; then
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R_TEXT='*(SORT(.text$*))'
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R_DATA='*(SORT(.data$*))'
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R_RDATA='*(SORT(.rdata$*))'
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if test "x$LD_FLAG" = "xauto_import" ; then
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R_DATA='*(SORT(.data$*))
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*(.rdata)
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*(SORT(.rdata$*))'
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R_RDATA=''
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else
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R_DATA='*(SORT(.data$*))'
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R_RDATA='*(.rdata)
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*(SORT(.rdata$*))'
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fi
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R_IDATA='
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SORT(*)(.idata$2)
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SORT(*)(.idata$3)
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@ -37,7 +45,7 @@ if test "${RELOCATING}"; then
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else
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R_TEXT=
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R_DATA=
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R_RDATA=
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R_RDATA='*(.rdata)'
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R_IDATA=
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R_CRT=
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R_RSRC=
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@ -93,7 +101,6 @@ SECTIONS
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.rdata ${RELOCATING+BLOCK(__section_alignment__)} :
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{
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*(.rdata)
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${R_RDATA}
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${RELOCATING+ *(.eh_frame)}
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${RELOCATING+___RUNTIME_PSEUDO_RELOC_LIST__ = .;}
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