b593e3d9b0
When `info float` is used on an AMD64 system, GDB prints
floating-point values of x87 registers with raw contents like
0x361a867a8e0527397ce0 or 0xc4f988454a1ddd3cfdab wrongly.
This happens due to truncation to double, after which the former
becomes 0.0, and the latter becomes negative infinity. This is caused
by failed detection of x86-64 host, which results in setting
gdb_host_{float,double,long_double}_format to zeros.
This commit fixes this misdetection, and adds a test to make sure
future commits don't introduce a regression here.
gdb/ChangeLog:
2015-12-09 Ruslan Kabatsayev <b7.10110111@gmail.com>
PR gdb/18702
* configure.host: Fix detection of x86_64 host when setting
floatformats.
gdb/testsuite/ChangeLog:
2015-12-09 Ruslan Kabatsayev <b7.10110111@gmail.com>
Pedro Alves <pedro@redhat.com>
PR gdb/18702
Add checking of floatformats setup on x86_64 hosts.
* gdb.arch/i386-float.S (main): Load bigval and smallval.
(smallval, bigval): New labels/constants.
* gdb.arch/i386-float.exp: Use with_test_prefix and test "info
float" after loading bigval and smallval.
219 lines
5.8 KiB
Plaintext
219 lines
5.8 KiB
Plaintext
# Mapping of configurations into GDB host definitions. This is
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# invoked from the autoconf generated configure script.
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# This file sets the following shell variables:
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# gdb_host_cpu generic name of host's CPU
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# gdb_host name of GDB host definition to use
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# gdb_host_float_format host's float floatformat, or 0
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# gdb_host_double_format host's double floatformat, or 0
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# gdb_host_long_double_format host's long double floatformat, or 0
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# gdb_host_obs host-specific .o files to include
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# Map host cpu into the config cpu subdirectory name.
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# The default is $host_cpu.
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case $host in
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arm*-*-netbsdelf* | \
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i[34567]86-*-netbsdelf* | \
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m68*-*-netbsdelf* | \
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sparc-*-netbsdelf* | \
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vax-*-netbsdelf*)
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;;
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*-*-irix* | \
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alpha*-*-osf* | \
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arm*-*-netbsd* | \
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hppa*-*-hiux* | \
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i[34567]86-ncr-* | \
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i[34567]86-*-dgux* | \
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i[34567]86-*-lynxos* | \
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i[34567]86-*-netbsd* | \
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i[34567]86-*-openbsd[0-2].* | i[34567]86-*-openbsd3.[0-3] | \
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i[34567]86-*-sco3.2v5* | \
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i[34567]86-*-sco3.2v4* | \
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i[34567]86-*-sco* | \
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i[34567]86-*-sysv4.2* | \
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i[34567]86-*-sysv4* | \
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i[34567]86-*-sysv5* | \
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i[34567]86-*-unixware2* | \
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i[34567]86-*-unixware* | \
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i[34567]86-*-sysv* | \
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i[34567]86-*-isc* | \
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m68*-*-netbsd* | \
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sparc-*-netbsd* | \
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rs6000-*-lynxos* | \
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vax-*-bsd* | \
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vax-*-netbsd* | \
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vax-*-ultrix* | \
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hppa*-*-hpux* | \
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ia64-*-hpux* | \
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null)
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echo "*** Configuration $host is obsolete." >&2
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echo "*** Support has been REMOVED." >&2
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exit 1
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;;
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esac
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case "${host_cpu}" in
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aarch64*) gdb_host_cpu=aarch64 ;;
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alpha*) gdb_host_cpu=alpha ;;
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arm*) gdb_host_cpu=arm ;;
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hppa*) gdb_host_cpu=pa ;;
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i[34567]86*) gdb_host_cpu=i386 ;;
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m68*) gdb_host_cpu=m68k ;;
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m88*) gdb_host_cpu=m88k ;;
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mips*) gdb_host_cpu=mips ;;
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powerpc* | rs6000) gdb_host_cpu=powerpc ;;
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sparcv9 | sparc64) gdb_host_cpu=sparc ;;
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s390*) gdb_host_cpu=s390 ;;
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sh*) gdb_host_cpu=sh ;;
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tilegx*) gdb_host_cpu=tilegx ;;
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x86_64*) gdb_host_cpu=i386 ;;
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m32r*) gdb_host_cpu=m32r ;;
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xtensa*) gdb_host_cpu=xtensa ;;
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*) gdb_host_cpu=$host_cpu ;;
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esac
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# map host info into gdb names.
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case "${host}" in
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*-*-darwin*) gdb_host=darwin ;;
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aarch64*-*-linux*) gdb_host=linux ;;
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alpha*-*-linux*) gdb_host=alpha-linux ;;
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alpha*-*-freebsd* | alpha*-*-kfreebsd*-gnu)
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gdb_host=fbsd ;;
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alpha*-*-netbsd* | alpha*-*-knetbsd*-gnu)
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gdb_host=nbsd ;;
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alpha*-*-openbsd*) gdb_host=nbsd ;;
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arm*-*-linux*) gdb_host=linux ;;
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arm*-*-netbsdelf* | arm*-*-knetbsd*-gnu)
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gdb_host=nbsdelf ;;
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arm*-*-openbsd*) gdb_host=nbsdelf ;;
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hppa*-*-linux*) gdb_host=linux ;;
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hppa*-*-netbsd*) gdb_host=nbsd ;;
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hppa*-*-openbsd*) gdb_host=obsd ;;
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i[34567]86-*-freebsd* | i[34567]86-*-kfreebsd*-gnu)
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gdb_host=fbsd ;;
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i[34567]86-*-netbsdelf* | i[34567]86-*-knetbsd*-gnu)
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gdb_host=nbsdelf ;;
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i[34567]86-*-go32*) gdb_host=go32 ;;
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i[34567]86-*-mingw32*) gdb_host=mingw
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gdb_host_obs=mingw-hdep.o
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;;
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i[34567]86-*-msdosdjgpp*) gdb_host=go32 ;;
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i[34567]86-*-linux*) gdb_host=linux ;;
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i[34567]86-*-gnu*) gdb_host=i386gnu ;;
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i[3456]86-*-nto*) gdb_host=nto ;;
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i[34567]86-*-openbsd*) gdb_host=obsd ;;
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i[34567]86-*-solaris2.1[0-9]* | x86_64-*-solaris2.1[0-9]*)
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gdb_host=sol2-64 ;;
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i[34567]86-*-solaris*) gdb_host=i386sol2 ;;
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i[34567]86-*-cygwin*) gdb_host=cygwin ;;
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ia64-*-linux*) gdb_host=linux ;;
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m68*-*-linux*) gdb_host=linux ;;
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m68*-*-netbsdelf* | m68*-*-knetbsd*-gnu)
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gdb_host=nbsdelf ;;
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m68*-*-openbsd*) gdb_host=obsd ;;
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m88*-*-openbsd*) gdb_host=obsd ;;
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mips*-*-linux*) gdb_host=linux ;;
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mips*-*-netbsd* | mips*-*-knetbsd*-gnu)
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gdb_host=nbsd ;;
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mips64*-*-openbsd*) gdb_host=obsd64 ;;
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powerpc-*-aix* | rs6000-*-* | powerpc64-*-aix*)
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gdb_host=aix ;;
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powerpc*-*-freebsd*) gdb_host=fbsd ;;
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powerpc-*-netbsd* | powerpc-*-knetbsd*-gnu)
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gdb_host=nbsd ;;
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powerpc-*-openbsd*) gdb_host=obsd ;;
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powerpc64*-*-linux*) gdb_host=ppc64-linux
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# Support 'pseudo-native' debugging on the Cell BE
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if test "${target_cpu}" = "spu"; then
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gdb_host=spu-linux
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gdb_native=yes
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fi
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;;
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powerpc*-*-linux*) gdb_host=linux ;;
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s390*-*-linux*) gdb_host=linux ;;
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sh*-*-netbsdelf* | sh*-*-knetbsd*-gnu)
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gdb_host=nbsd ;;
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sh*-*-openbsd*) gdb_host=nbsd ;;
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sparc64-*-freebsd* | sparc64-*-kfreebsd*-gnu)
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gdb_host=fbsd ;;
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sparc-*-linux*) gdb_host=linux ;;
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sparc64-*-linux*) gdb_host=linux64 ;;
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sparc-*-netbsdelf* | sparc-*-knetbsd*-gnu)
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gdb_host=nbsdelf ;;
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sparc64-*-netbsd* | sparc64-*-knetbsd*-gnu)
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gdb_host=nbsd64 ;;
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sparc-*-openbsd*) gdb_host=nbsdelf ;;
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sparc64-*-openbsd*) gdb_host=obsd64 ;;
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sparc-*-solaris2* | sparcv9-*-solaris2* | sparc64-*-solaris2*)
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gdb_host=sol2
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;;
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tilegx-*-linux*) gdb_host=linux ;;
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vax-*-netbsdelf* | vax-*-knetbsd*-gnu)
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gdb_host=nbsdelf ;;
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vax-*-openbsd*) gdb_host=obsd ;;
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x86_64-*-linux*) gdb_host=linux64 ;;
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x86_64-*-freebsd* | x86_64-*-kfreebsd*-gnu)
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gdb_host=fbsd64 ;;
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x86_64-*-netbsd* | x86_64-*-knetbsd*-gnu)
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gdb_host=nbsd64 ;;
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x86_64-*-openbsd*) gdb_host=obsd64 ;;
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x86_64-*-mingw*) gdb_host=mingw64
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gdb_host_obs=mingw-hdep.o
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;;
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x86_64-*-cygwin*) gdb_host=cygwin64 ;;
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m32r*-*-linux*) gdb_host=linux ;;
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xtensa*-*-linux*) gdb_host=linux ;;
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esac
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# Map the host/cpu onto the floatformat correspondong to C's "float",
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# "double" and "long double" types.
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case "${host}" in
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i[34567]86-*-*|x86_64-*-*)
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gdb_host_float_format="&floatformat_ieee_single_little"
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gdb_host_double_format="&floatformat_ieee_double_little"
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gdb_host_long_double_format="&floatformat_i387_ext"
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;;
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hppa*-*-linux*)
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gdb_host_float_format="&floatformat_ieee_single_big"
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gdb_host_double_format="&floatformat_ieee_double_big"
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gdb_host_long_double_format="&floatformat_ieee_double_big"
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;;
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m68*-*-*)
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gdb_host_float_format="&floatformat_ieee_single_big"
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gdb_host_double_format="&floatformat_ieee_double_big"
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gdb_host_long_double_format="&floatformat_m68881_ext"
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;;
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*)
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gdb_host_float_format=0
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gdb_host_double_format=0
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gdb_host_long_double_format=0
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;;
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esac
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