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64 lines
1.9 KiB
Plaintext
64 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/sparc/sparc64/elf.
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if test "$usetls" != no; then
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# Check for support of thread-local storage handling in assembler and linker.
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AC_CACHE_CHECK(for sparc64 TLS support, libc_cv_sparc64_tls, [dnl
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changequote(,)dnl
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cat > conftest.s <<\EOF
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.section ".tdata", "awT", @progbits
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.globl foo
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foo: .word 1
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.section ".tbss", "awT", @nobits
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.globl bar
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bar: .skip 4
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.text
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.globl _start
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_start: sethi %tgd_hi22(foo), %l1
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add %l1, %tgd_lo10(foo), %l1
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add %l7, %l1, %o0, %tgd_add(foo)
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call __tls_get_addr, %tgd_call(foo)
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sethi %tldm_hi22(bar), %l1
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add %l1, %tldm_lo10(bar), %l1
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add %l7, %l1, %o0, %tldm_add(bar)
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call __tls_get_addr, %tldm_call(bar)
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sethi %tldo_hix22(bar), %l1
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xor %l1, %tldo_lox10(bar), %l1
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add %o0, %l1, %l1, %tldo_add(bar)
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sethi %tie_hi22(foo), %l1
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add %l1, %tie_lo10(foo), %l1
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ldx [%l7 + %l1], %l1, %tie_ldx(foo)
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add %g7, %l1, %l1, %tie_add(foo)
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sethi %tle_hix22(foo), %l1
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xor %l1, %tle_lox10(foo), %l1
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EOF
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changequote([,])dnl
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dnl
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if AC_TRY_COMMAND(${CC-cc} -o conftest.bin $CFLAGS $LDFLAGS conftest.s -nostdlib -nostartfiles 1>&AS_MESSAGE_LOG_FD); then
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libc_cv_sparc64_tls=yes
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else
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libc_cv_sparc64_tls=no
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fi
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rm -f conftest*])
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if test $libc_cv_sparc64_tls = yes; then
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AC_DEFINE(HAVE_TLS_SUPPORT)
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fi
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fi
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# Check for broken WDISP22 in the linker.
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AC_CACHE_CHECK(for sparc64 ld WDISP22 handling, libc_cv_sparc64_wdisp22, [dnl
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echo 'bne foo; nop' > conftest1.s
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echo '.globl foo; .hidden foo; foo: nop' > conftest2.s
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libc_cv_sparc64_wdisp22=unknown
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if AC_TRY_COMMAND(${CC-cc} -nostdlib -shared $CFLAGS conftest1.s conftest2.s -o conftest.so 1>&AS_MESSAGE_LOG_FD); then
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if readelf -r conftest.so | grep -q R_SPARC_WDISP22; then
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libc_cv_sparc64_wdisp22=broken
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else
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libc_cv_sparc64_wdisp22=ok
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fi
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fi
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rm -f conftest*])
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if test $libc_cv_sparc64_wdisp22 != ok; then
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AC_DEFINE(BROKEN_SPARC_WDISP22)
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fi
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