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362588f7cc
The test is not a run-time check, so update the description. Also use readelf -W for a more stable output format and fix an LC_ALL typo. This avoids garbled configure messages: checking for s390-specific static PIE requirements (runtime check)... 0x0000000000000017 (JMPREL) 0x280 yes
58 lines
1.9 KiB
Plaintext
58 lines
1.9 KiB
Plaintext
GLIBC_PROVIDES dnl See aclocal.m4 in the top level source directory.
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# Local configure fragment for sysdeps/s390/s390-64.
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# Minimal checking for static PIE support in ld.
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# Compare to ld testcase/bugzilla:
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# <binutils-source>/ld/testsuite/ld-elf/pr22263-1.rd
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AC_CACHE_CHECK([for s390-specific static PIE requirements], \
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[libc_cv_s390x_staticpie_req_runtime], [dnl
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cat > conftest1.c <<EOF
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__thread int * foo;
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void
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bar (void)
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{
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*foo = 1;
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}
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void bar2 (void);
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void* bar2_ifunc (void) __asm__ ("bar2");
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__asm__ (".type bar2, %gnu_indirect_function");
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void* bar2_ifunc (void) { return 0; }
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EOF
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cat > conftest2.c <<EOF
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extern __thread int *foo;
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extern void bar (void);
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extern void bar2 (void);
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static int x;
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int
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main ()
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{
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foo = &x;
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bar2 ();
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return 0;
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}
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EOF
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libc_cv_s390x_staticpie_req_runtime=no
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# Check if the static linker does not generate dynamic TLS relocs in PIE
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# (binutils PR ld/22263), if it accepts --no-dynamic-linker
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# (by using -static-pie), and if it adds a DT_JMPREL pointing to .rela.iplt
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# with static pie.
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if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -fPIE -c conftest1.c -o conftest1.o]) \
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&& AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -fPIE -c conftest2.c -o conftest2.o]) \
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&& AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -static-pie -nostartfiles -nostdlib -fPIE -o conftest conftest1.o conftest2.o]) \
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&& AC_TRY_COMMAND([! LC_ALL=C $READELF -Wr conftest | grep R_390_TLS_TPOFF] >&AS_MESSAGE_LOG_FD) \
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&& AC_TRY_COMMAND([LC_ALL=C $READELF -Wd conftest | grep JMPREL >&AS_MESSAGE_LOG_FD])
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then
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libc_cv_s390x_staticpie_req_runtime=yes
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fi
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rm -rf conftest.*])
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if test $libc_cv_s390x_staticpie_req_runtime = yes; then
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# Some kernels might fail with /proc/sys/kernel/randomize_va_space set to 0
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# due not enough space for a brk call. However, there is no reliable way to
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# test it.
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AC_DEFINE(SUPPORT_STATIC_PIE)
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fi
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