+# Skip targets where -shared is not supported
+
+if ![check_shared_lib_support] {
+ return
+}
+
+# Add $NOPIE_CFLAGS and $NOPIE_LDFLAGS if non-PIE is required.
+global NOPIE_CFLAGS NOPIE_LDFLAGS
+
+set old_ASFLAGS $ASFLAGS
+
+# This target requires extra GAS options when building code for shared
+# libraries.
+set AFLAGS_PIC ""
+if [istarget "nds32*-*"] {
+ append AFLAGS_PIC " -mpic"
+}
+if [istarget "tic6x-*-*"] {
+ append AFLAGS_PIC " -mpic -mpid=near"
+}
+if [istarget "sparc*-*-*"] {
+ append AFLAGS_PIC " -K PIC -Av9"
+}
+
+# GAS options to disable program property note.
+set AFLAGS_NOTE ""
+if { [istarget "i?86-*-*"] || [istarget "x86_64-*-*"] } {
+ append AFLAGS_NOTE "-mx86-used-note=no"
+}
+
+# This target requires a non-default emulation for successful shared
+# library/executable builds.
+set LFLAGS ""
+if [istarget "tic6x-*-*"] {
+ append LFLAGS " -melf32_tic6x_le"
+}
+# HPUX targets use a different .comm syntax.
+set hpux ""
+if [istarget "*-*-hpux*"] {
+ set hpux "--defsym HPUX=1"
+}
+# These targets do not default to linking with shared libraries.
+if { [istarget "mips*vr4100*-*-elf*"] \
+ || [istarget "mips*vr4300*-*-elf*"] \
+ || [istarget "mips*vr5000*-*-elf*"] } {
+ append LFLAGS " -call_shared"
+}
+
+if [is_underscore_target] {
+ set ASFLAGS "$ASFLAGS --defsym UNDERSCORE=1"
+}
+
+run_ld_link_tests [list \
+ [list \
+ "Build pr22471a.so" \
+ "$LFLAGS -shared" \
+ "" \
+ "$AFLAGS_PIC" \
+ {pr22471a.s} \
+ {} \
+ "pr22471a.so" \
+ ] \
+ [list \
+ "Build pr22471b.so" \
+ "$LFLAGS -shared --version-script pr22471.t" \
+ "tmpdir/pr22471a.so" \
+ "$AFLAGS_PIC" \
+ {pr22471a.s} \
+ {} \
+ "pr22471b.so" \
+ ] \
+ [list \
+ "Build pr22471" \
+ "$LFLAGS -rpath-link ." \
+ "tmpdir/pr22471b.so" \
+ "" \
+ {pr22471b.s} \
+ {} \
+ "pr22471" \
+ ] \
+ [list \
+ "Build pr22649-1.so" \
+ "$LFLAGS -shared" \
+ "" \
+ "$AFLAGS_PIC" \
+ {pr22649-1.s} \
+ {} \
+ "pr22649-1.so" \
+ ] \
+]
+
+if { [check_gc_sections_available] } {
+ if [istarget mips*-*-*] {
+ set actions {{ld pr22649-2ab-mips.msg}}
+ } else {
+ set actions {{ld pr22649.msg}}
+ }
+ run_ld_link_tests [list \
+ [list \
+ "Build pr22649-2a.so" \
+ "$LFLAGS -shared -gc-sections -print-gc-sections" \
+ "" \
+ "$AFLAGS_PIC" \
+ {pr22649-2a.s} \
+ $actions \
+ "pr22649-2a.so" \
+ ] \
+ [list \
+ "Build pr22649-2b.so" \
+ "$LFLAGS -shared -gc-sections -print-gc-sections" \
+ "tmpdir/pr22649-1.so" \
+ "$AFLAGS_PIC" \
+ {pr22649-2a.s} \
+ $actions \
+ "pr22649-2b.so" \
+ ] \
+ ]
+ if { [istarget mips*-*-*] && ![istarget *-*-elf*] } {
+ set actions {{ld pr22649-2cd-mips.msg}}
+ } else {
+ set actions {}
+ }
+ run_ld_link_tests [list \
+ [list \
+ "Build pr22649-2c.so" \
+ "$LFLAGS -shared -gc-sections -print-gc-sections" \
+ "" \
+ "$AFLAGS_PIC" \
+ {pr22649-2b.s} \
+ $actions \
+ "pr22649-2b.so" \
+ ] \
+ [list \
+ "Build pr22649-2d.so" \
+ "$LFLAGS -shared -gc-sections -print-gc-sections" \
+ "tmpdir/pr22649-1.so" \
+ "$AFLAGS_PIC" \
+ {pr22649-2b.s} \
+ $actions \
+ "pr22649-2b.so" \
+ ] \
+ ]
+}
+
+run_ld_link_tests [list \
+ [list \
+ "DT_TEXTREL in shared lib" \
+ "$LFLAGS -shared --warn-shared-textrel" \
+ "" \
+ "$AFLAGS_PIC" \
+ {textrel.s} \
+ {{ld textrel.warn} \
+ {readelf {-d --wide} textrel.rd}} \
+ "textrel.so" \
+ ] \
+] "xtensa-*-*"
+
+# The MIPS backend sets SHF_WRITE, in `mips_elf_create_dynamic_relocation',
+# for any section that has a dynamic relocation attached and consequently
+# this test is irrelevant for MIPS targets. We don't have a clean way to
+# request UNSUPPORTED result, which would be the most appropriate here,
+# so we just XFAIL the test instead.
+run_ld_link_tests [list \
+ [list \
+ "DT_TEXTREL map file warning" \
+ "$LFLAGS -shared -M" \
+ "" \
+ "$AFLAGS_PIC" \
+ {textrel.s} \
+ {{ld textrel.map}} \
+ "textrel.so" \
+ ] \
+] "cris*-*-*" "mips*-*-*"
+
+# PR ld/20828 check for correct dynamic symbol table entries where:
+# - symbols have been defined with a linker script,
+# - the same symbols have been seen in shared library used in the link,
+# - the shared library symbols have been swept in section garbage collection.
+# Verify that the symbols are global rather than local and that a version
+# script adjusts them accordingly.
+# Also verify that a version definition supplied by an object rather than
+# a version script and forcibly exported is unaffected by section GC.
+if { [check_gc_sections_available] } {
+ run_ld_link_tests [list \
+ [list \
+ "PR ld/20828 dynamic symbols with section GC\
+ (auxiliary shared library)" \
+ "$LFLAGS -shared --gc-sections -T pr20828.ld" "" "$AFLAGS_PIC" \
+ {pr20828.s} \
+ {{readelf --dyn-syms pr20828-a.sd} \
+ {readelf --dyn-syms pr20828-b.sd}} \
+ "libpr20828.so"] \
+ [list \
+ "PR ld/20828 dynamic symbols with section GC (plain)" \
+ "$LFLAGS -shared --gc-sections -T pr20828.ld" \
+ "tmpdir/libpr20828.so" "$AFLAGS_PIC" \
+ {pr20828.s} \
+ {{readelf --dyn-syms pr20828-a.sd} \
+ {readelf --dyn-syms pr20828-b.sd}} \
+ "pr20828-1.so"] \
+ [list \
+ "PR ld/20828 dynamic symbols with section GC (version script)" \
+ "$LFLAGS -shared --gc-sections -T pr20828.ld\
+ --version-script=pr20828.ver" \
+ "tmpdir/libpr20828.so" \
+ "$AFLAGS_PIC" \
+ {pr20828.s} \
+ {{readelf --dyn-syms pr20828-b.sd} \
+ {readelf --dyn-syms pr20828-c.sd}} \
+ "pr20828-2.so"] \
+ [list \
+ "PR ld/20828 dynamic symbols with section GC\
+ (versioned shared library)" \
+ "$LFLAGS -shared --gc-sections -T pr20828.ld\
+ --version-script=pr20828-v.ver" \
+ "" "$AFLAGS_PIC" \
+ {pr20828.s} \
+ {{readelf --dyn-syms pr20828-c.sd} \
+ {readelf --dyn-syms pr20828-d.sd} \
+ {readelf --dyn-syms pr20828-e.sd}} \
+ "libpr20828-v.so"] \
+ [list \
+ "PR ld/20828 dynamic symbols with section GC (versioned)" \
+ "$LFLAGS -shared --gc-sections -T pr20828.ld\
+ --version-script=pr20828-v.ver" \
+ "tmpdir/libpr20828-v.so" \
+ "$AFLAGS_PIC" \
+ {pr20828.s} \
+ {{readelf --dyn-syms pr20828-c.sd} \
+ {readelf --dyn-syms pr20828-d.sd} \
+ {readelf --dyn-syms pr20828-e.sd}} \
+ "pr20828-v.so"] \
+ [list \
+ "PR ld/20828 forcibly exported symbol version without section GC" \
+ "$LFLAGS --no-dynamic-linker -e foo -E -T pr20828-v.ld" "" "" \
+ {pr20828-v.s} \
+ {{objdump -p pr20828-v.od}} \
+ "pr20828-v-1"] \
+ [list \
+ "PR ld/20828 forcibly exported symbol version with section GC" \
+ "$LFLAGS --no-dynamic-linker -e foo --gc-sections -E -T pr20828-v.ld" "" "" \
+ {pr20828-v.s} \
+ {{objdump -p pr20828-v.od}} \
+ "pr20828-v-2"]]
+}
+# PR ld/21233 check for correct dynamic symbol table entries where:
+# - a symbol has been defined in a shared library used in the link,
+# - the symbol has been referenced from a section swept in garbage collection,
+# - the symbol has also been forced to be entered in the output file as an
+# undefined symbol, either with a command-line option or a linker script
+# command.
+# Verify that the undefined symbol is global rather than local.
+if { [check_gc_sections_available] } {
+ run_ld_link_tests [list \
+ [list \
+ "PR ld/21233 dynamic symbols with section GC\
+ (auxiliary shared library)" \
+ "$LFLAGS -shared -T pr21233.ld" "" "$AFLAGS_PIC" \
+ {pr21233-l.s} \
+ {{readelf --dyn-syms pr21233-l.sd}} \
+ "libpr21233.so"]]
+
+ run_ld_link_tests [list \
+ [list \
+ "PR ld/21233 dynamic symbols with section GC (--undefined)" \
+ "$LFLAGS --gc-sections -e foo --undefined=bar -T pr21233.ld" \
+ "tmpdir/libpr21233.so" "" \
+ {pr21233.s} \
+ {{readelf --dyn-syms pr21233.sd}} \
+ "pr21233-1"]]
+
+ run_ld_link_tests [list \
+ [list \
+ "PR ld/21233 dynamic symbols with section GC (--require-defined)" \
+ "$LFLAGS --gc-sections -e foo --require-defined=bar\
+ -T pr21233.ld" \
+ "tmpdir/libpr21233.so" "" \
+ {pr21233.s} \
+ {{readelf --dyn-syms pr21233.sd}} \
+ "pr21233-2"]]
+
+ run_ld_link_tests [list \
+ [list \
+ "PR ld/21233 dynamic symbols with section GC (EXTERN)" \
+ "$LFLAGS --gc-sections -e foo -T pr21233-e.ld" \
+ "tmpdir/libpr21233.so" "" \
+ {pr21233.s} \
+ {{readelf --dyn-syms pr21233.sd}} \
+ "pr21233-3"]]
+}
+
+if { [check_gc_sections_available] } {
+ run_ld_link_tests [list \
+ [list \
+ "Build pr22150.so" \
+ "$LFLAGS -shared --version-script pr22150.ver" \
+ "" \
+ "$AFLAGS_PIC" \
+ {pr22150a.s} \
+ {} \
+ "pr22150.so" \
+ ] \
+ [list \
+ "Build pr22150" \
+ "$LFLAGS -e _start --gc-sections" \
+ "tmpdir/pr22150.so" \
+ "" \
+ {pr22150b.s} \
+ {{readelf -V pr22150.vd}} \
+ "pr22150" \
+ ] \
+ ]
+
+ switch -glob $target_triplet {
+ # exclude targets that don't support copy relocs
+ bfin-*-* { }
+ frv-*-* { }
+ lm32-*-* { }
+ mips*-*-* { }
+ tic6x-*-* { }
+ xtensa-*-* { }
+ default {
+ run_ld_link_tests [list \
+ [list \
+ "Build pr25458.so" \
+ "$LFLAGS -shared --version-script=pr25458.map" \
+ "" \
+ "$AFLAGS_PIC" \
+ {pr25458b.s} \
+ {} \
+ "pr25458.so" \
+ ] \
+ [list \
+ "Build pr25458" \
+ "$LFLAGS -e _start --gc-sections" \
+ "tmpdir/pr25458.so" \
+ "$AFLAGS_PIC" \
+ {pr25458a.s} \
+ {{readelf {--dyn-sym --wide} pr25458.rd}} \
+ "pr25458" \
+ ] \
+ ]
+ }
+ }
+}
+
+set ASFLAGS $old_ASFLAGS
+
+run_ld_link_tests {
+ {"Build pr14170a.o" "" "" "" {pr14170a.s} {} "pr14170.a" }
+}
+run_ld_link_tests [list \
+ [list "Build shared library for pr14170" \
+ "-shared" "" "$AFLAGS_PIC" "pr14170b.s" {} "pr14170.so" ] \
+]
+
+# bfin does not currently support copy relocs.
+run_ld_link_tests [list \
+ [list "PR ld/14170" \
+ "$LFLAGS --no-dynamic-linker tmpdir/pr14170a.o tmpdir/pr14170.so" "" \
+ $hpux \
+ {pr14170c.s} { } "pr14170" ] \
+] "bfin-*-*"
+
+# Targets that use _bfd_generic_link_add_symbols won't pass pr21703 tests
+# Nor will hppa64 with dot-symbols.
+run_ld_link_tests [list \
+ [list "PR ld/21703 shared" \
+ "-shared --allow-multiple-definition --version-script pr21703.ver\
+ tmpdir/pr21703-3.o tmpdir/pr21703-4.o" "" "$AFLAGS_PIC" \
+ {pr21703-3.s pr21703-4.s} {{readelf {--dyn-syms} pr21703-shared.sd}} \
+ "pr21703.so" ] \
+] \[is_generic\] hppa64-*-*
+
+# This target requires extra GAS options when building non-PIC code
+# for linking with shared libraries.
+set AFLAGS_NONPIC ""
+if [istarget "mips*-*-*"] {
+ append AFLAGS_NONPIC " -call_nonpic"
+}
+
+# Run a test to check linking a shared library with a broken linker
+# script that accidentally marks dynamic sections as notes. The
+# resulting executable is not expected to work, but the linker
+# should not seg-fault whilst creating the binary.
+run_ld_link_tests [list \
+ [list "Build shared library for broken linker script test" \
+ "-shared --hash-style=sysv" "" "$AFLAGS_PIC" "note-3.s" \
+ {} \
+ "note-3.so" ] \
+ [list "Link using broken linker script" \
+ "$LFLAGS --script note-3.t tmpdir/note-3.so" "" "" "" \
+ { { ld "note-3.l" } } \
+ "a.out" ] \
+]
+
+run_ld_link_tests [list \
+ [list "Build pr17068.so" \
+ "-shared" "" "$AFLAGS_PIC" \
+ {pr17068d.s} {} "pr17068.so"] \
+ [list "Build pr17068a.a" \
+ "" "" "" \
+ {pr17068a.s pr17068c.s pr17068ez.s} {} "pr17068a.a"] \
+ [list "Build pr17068b.a" \
+ "" "" "" \
+ {pr17068b.s pr17068e.s} {} "pr17068b.a"] \
+]
+
+# bfin does not currently support copy relocs.
+run_ld_link_tests {
+ {"pr17068 link --as-needed lib in group"
+ "$LFLAGS --as-needed --no-dynamic-linker"
+ "--start-group tmpdir/pr17068a.a tmpdir/pr17068.so tmpdir/pr17068b.a\
+ --end-group" ""
+ {start.s pr17068.s} {} "pr17068"}
+} "bfin-*-*"
+
+# Fails on MIPS because ABI trickery means that a NULL reloc is emitted.
+# Fails on bfin because relocations are not created.
+run_ld_link_tests [list \
+ [list "-Bsymbolic-functions" \
+ "-shared -Bsymbolic-functions" "" "$AFLAGS_PIC" \
+ {symbolic-func.s} {{readelf {-r --wide} symbolic-func.r}} \
+ "symbolic-func.so"] \
+] "mips*-*-*" "bfin-*-*"
+
+run_ld_link_tests [list \
+ [list "Build pr20995.so" \
+ "-shared" "" "$AFLAGS_PIC" \
+ {pr20995b.s} {} "pr20995.so"] \
+]
+
+# xfail on arm*-*-eabi*. The list can be enlarged to those targets that
+# don't support GNU_RELRO. For more details, please see discussions at:
+# https://sourceware.org/ml/binutils/2017-01/msg00441.html
+run_ld_link_tests [list \
+ [list "Build pr20995-2.so" \
+ "-shared -z relro" "" "$AFLAGS_PIC" \
+ {pr20995c.s} {{readelf {-l --wide} pr20995-2so.r}} "pr20995-2.so"] \
+] "tic6x-*-*" "arm*-*-eabi*" "hppa*64*-*-hpux*" "aarch64*-*-elf*" \
+ "*-*-lynxos*" "arm*-*-nto*" "i?86-*-nto*" "sh*-*-nto*"
+
+# These targets don't copy dynamic variables into .bss.
+setup_xfail "alpha-*-*" "bfin-*-*" "ia64-*-*" "xtensa-*-*"
+# or don't have .data.rel.ro
+setup_xfail "hppa*64*-*-hpux*"
+run_ld_link_tests [list \
+ [list \
+ "pr20995" \
+ "$LFLAGS" "tmpdir/pr20995.so" "$AFLAGS_NONPIC" \
+ {pr20995a.s} {{readelf {-S --wide} pr20995.r}} "pr20995"]]
+
+# xfail on arm*-*-eabi* is particularly because of no support of GNU_RELRO.
+# Please see the link above for details.
+setup_xfail "alpha-*-*" "bfin-*-*" "ia64-*-*" "xtensa-*-*" "arm*-*-eabi*"
+setup_xfail "hppa*64*-*-hpux*" "aarch64*-*-elf*"
+run_ld_link_tests [list \
+ [list \
+ "pr20995-2" \
+ "$LFLAGS" "tmpdir/pr20995-2.so" "$AFLAGS_NONPIC" \
+ {pr20995a.s} {{readelf {-S --wide} pr20995.r}} "pr20995-2"]
+] "*-*-lynxos*" "arm*-*-nto*" "i?86-*-nto*" "sh*-*-nto*"
+
+run_ld_link_tests [list \
+ [list "Build pr22374 shared library" \
+ "-shared" "" "$AFLAGS_PIC" "pr22374b.s" {} "pr22374.so" ] \
+]
+if { ![istarget "alpha-*-*"]
+ && ![istarget "csky-*-*"]
+ && ![istarget "frv-*-*"]
+ && ![istarget "hppa*-*-*"]
+ && ![istarget "i?86-*-*"]
+ && ![istarget "ia64-*-*"]
+ && ![istarget "microblaze-*-*"]
+ && ![istarget "powerpc*-*-*"]
+ && ![istarget "x86_64-*-*"]
+ && ![istarget "xtensa-*-*"] } {
+ # The next test checks that copy relocs are not used unnecessarily,
+ # but that is just an optimization so don't complain loudly.
+ setup_xfail "*-*-*"
+}
+run_ld_link_tests {
+ {"pr22374 function pointer initialization"
+ "" "tmpdir/pr22374.so" "" "pr22374a.s"
+ { {readelf {--wide -r --dyn-syms} "pr22374-1.r"}
+ {readelf {--wide -r} "pr22374-2.r"} }
+ "pr22374" }
+}
+
+if { [istarget *-*-linux*]
+ || [istarget *-*-nacl*]
+ || [istarget *-*-gnu*] } {
+ run_ld_link_tests {
+ {"Weak symbols in dynamic objects 1 (support)"
+ "-shared" "" "" {weak-dyn-1a.s}
+ {}
+ "libweakdyn1a.so"}
+ {"Weak symbols in dynamic objects 1 (main test)"
+ "-shared tmpdir/libweakdyn1a.so -Tweak-dyn-1.ld" "" "" {weak-dyn-1b.s}
+ {{readelf {--relocs --wide} weak-dyn-1.rd}}
+ "libweakdyn1b.so"}
+ }
+}
+