mirror of
https://sourceware.org/git/glibc.git
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a8ba52bde5
ARM _dl_tlsdesc_dynamic slow path has two issues:
* The ip/r12 is defined by AAPCS as a scratch register, and gcc is
used to save the stack pointer before on some function calls. So it
should also be saved/restored as well. It fixes the tst-gnu2-tls2.
* None of the possible VFP registers are saved/restored. ARM has the
additional complexity to have different VFP bank sizes (depending of
VFP support by the chip).
The tst-gnu2-tls2 test is extended to check for VFP registers, although
only for hardfp builds. Different than setcontext, _dl_tlsdesc_dynamic
does not have HWCAP_ARM_IWMMXT (I don't have a way to properly test
it and it is almost a decade since newer hardware was released).
With this patch there is no need to mark tst-gnu2-tls2 as XFAIL.
Checked on arm-linux-gnueabihf.
Reviewed-by: H.J. Lu <hjl.tools@gmail.com>
(cherry picked from commit 64c7e34428)
326 lines
9.2 KiB
Plaintext
326 lines
9.2 KiB
Plaintext
# This file is generated from configure.ac by Autoconf. DO NOT EDIT!
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# Local configure fragment for sysdeps/arm.
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# We check to see if the compiler and flags are
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# selecting the hard-float ABI and if they are then
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# we set libc_cv_arm_pcs_vfp to yes which causes
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# HAVE_ARM_PCS_VFP to be defined in config.h and
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# in include/libc-symbols.h and thus available to
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# shlib-versions to select the appropriate name for
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# the dynamic linker via %ifdef.
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{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for grep that handles long lines and -e" >&5
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printf %s "checking for grep that handles long lines and -e... " >&6; }
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if test ${ac_cv_path_GREP+y}
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then :
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printf %s "(cached) " >&6
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else $as_nop
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if test -z "$GREP"; then
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ac_path_GREP_found=false
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# Loop through the user's path and test for each of PROGNAME-LIST
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as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
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for as_dir in $PATH$PATH_SEPARATOR/usr/xpg4/bin
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do
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IFS=$as_save_IFS
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case $as_dir in #(((
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'') as_dir=./ ;;
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*/) ;;
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*) as_dir=$as_dir/ ;;
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esac
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for ac_prog in grep ggrep
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do
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for ac_exec_ext in '' $ac_executable_extensions; do
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ac_path_GREP="$as_dir$ac_prog$ac_exec_ext"
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as_fn_executable_p "$ac_path_GREP" || continue
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# Check for GNU ac_path_GREP and select it if it is found.
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# Check for GNU $ac_path_GREP
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case `"$ac_path_GREP" --version 2>&1` in
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*GNU*)
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ac_cv_path_GREP="$ac_path_GREP" ac_path_GREP_found=:;;
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*)
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ac_count=0
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printf %s 0123456789 >"conftest.in"
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while :
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do
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cat "conftest.in" "conftest.in" >"conftest.tmp"
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mv "conftest.tmp" "conftest.in"
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cp "conftest.in" "conftest.nl"
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printf "%s\n" 'GREP' >> "conftest.nl"
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"$ac_path_GREP" -e 'GREP$' -e '-(cannot match)-' < "conftest.nl" >"conftest.out" 2>/dev/null || break
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diff "conftest.out" "conftest.nl" >/dev/null 2>&1 || break
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as_fn_arith $ac_count + 1 && ac_count=$as_val
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if test $ac_count -gt ${ac_path_GREP_max-0}; then
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# Best one so far, save it but keep looking for a better one
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ac_cv_path_GREP="$ac_path_GREP"
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ac_path_GREP_max=$ac_count
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fi
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# 10*(2^10) chars as input seems more than enough
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test $ac_count -gt 10 && break
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done
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rm -f conftest.in conftest.tmp conftest.nl conftest.out;;
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esac
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$ac_path_GREP_found && break 3
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done
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done
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done
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IFS=$as_save_IFS
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if test -z "$ac_cv_path_GREP"; then
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as_fn_error $? "no acceptable grep could be found in $PATH$PATH_SEPARATOR/usr/xpg4/bin" "$LINENO" 5
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fi
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else
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ac_cv_path_GREP=$GREP
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fi
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fi
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{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_path_GREP" >&5
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printf "%s\n" "$ac_cv_path_GREP" >&6; }
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GREP="$ac_cv_path_GREP"
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{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for egrep" >&5
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printf %s "checking for egrep... " >&6; }
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if test ${ac_cv_path_EGREP+y}
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then :
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printf %s "(cached) " >&6
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else $as_nop
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if echo a | $GREP -E '(a|b)' >/dev/null 2>&1
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then ac_cv_path_EGREP="$GREP -E"
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else
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if test -z "$EGREP"; then
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ac_path_EGREP_found=false
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# Loop through the user's path and test for each of PROGNAME-LIST
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as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
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for as_dir in $PATH$PATH_SEPARATOR/usr/xpg4/bin
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do
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IFS=$as_save_IFS
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case $as_dir in #(((
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'') as_dir=./ ;;
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*/) ;;
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*) as_dir=$as_dir/ ;;
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esac
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for ac_prog in egrep
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do
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for ac_exec_ext in '' $ac_executable_extensions; do
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ac_path_EGREP="$as_dir$ac_prog$ac_exec_ext"
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as_fn_executable_p "$ac_path_EGREP" || continue
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# Check for GNU ac_path_EGREP and select it if it is found.
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# Check for GNU $ac_path_EGREP
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case `"$ac_path_EGREP" --version 2>&1` in
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*GNU*)
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ac_cv_path_EGREP="$ac_path_EGREP" ac_path_EGREP_found=:;;
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*)
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ac_count=0
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printf %s 0123456789 >"conftest.in"
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while :
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do
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cat "conftest.in" "conftest.in" >"conftest.tmp"
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mv "conftest.tmp" "conftest.in"
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cp "conftest.in" "conftest.nl"
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printf "%s\n" 'EGREP' >> "conftest.nl"
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"$ac_path_EGREP" 'EGREP$' < "conftest.nl" >"conftest.out" 2>/dev/null || break
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diff "conftest.out" "conftest.nl" >/dev/null 2>&1 || break
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as_fn_arith $ac_count + 1 && ac_count=$as_val
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if test $ac_count -gt ${ac_path_EGREP_max-0}; then
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# Best one so far, save it but keep looking for a better one
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ac_cv_path_EGREP="$ac_path_EGREP"
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ac_path_EGREP_max=$ac_count
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fi
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# 10*(2^10) chars as input seems more than enough
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test $ac_count -gt 10 && break
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done
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rm -f conftest.in conftest.tmp conftest.nl conftest.out;;
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esac
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$ac_path_EGREP_found && break 3
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done
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done
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done
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IFS=$as_save_IFS
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if test -z "$ac_cv_path_EGREP"; then
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as_fn_error $? "no acceptable egrep could be found in $PATH$PATH_SEPARATOR/usr/xpg4/bin" "$LINENO" 5
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fi
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else
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ac_cv_path_EGREP=$EGREP
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fi
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fi
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fi
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{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_path_EGREP" >&5
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printf "%s\n" "$ac_cv_path_EGREP" >&6; }
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EGREP="$ac_cv_path_EGREP"
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{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether the compiler is using the ARM hard-float ABI" >&5
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printf %s "checking whether the compiler is using the ARM hard-float ABI... " >&6; }
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if test ${libc_cv_arm_pcs_vfp+y}
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then :
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printf %s "(cached) " >&6
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else $as_nop
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cat confdefs.h - <<_ACEOF >conftest.$ac_ext
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/* end confdefs.h. */
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#ifdef __ARM_PCS_VFP
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yes
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#endif
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_ACEOF
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if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
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$EGREP "yes" >/dev/null 2>&1
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then :
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libc_cv_arm_pcs_vfp=yes
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else $as_nop
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libc_cv_arm_pcs_vfp=no
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fi
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rm -rf conftest*
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fi
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{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $libc_cv_arm_pcs_vfp" >&5
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printf "%s\n" "$libc_cv_arm_pcs_vfp" >&6; }
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if test $libc_cv_arm_pcs_vfp = yes; then
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printf "%s\n" "#define HAVE_ARM_PCS_VFP 1" >>confdefs.h
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config_vars="$config_vars
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default-abi = hard"
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else
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config_vars="$config_vars
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default-abi = soft"
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fi
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{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether VFP supports 32 registers" >&5
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printf %s "checking whether VFP supports 32 registers... " >&6; }
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if test ${libc_cv_arm_pcs_vfp_d32+y}
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then :
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printf %s "(cached) " >&6
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else $as_nop
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cat confdefs.h - <<_ACEOF >conftest.$ac_ext
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/* end confdefs.h. */
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void foo (void)
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{
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asm volatile ("vldr d16,=17" : : : "d16");
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}
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_ACEOF
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if ac_fn_c_try_compile "$LINENO"
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then :
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libc_cv_arm_pcs_vfp_d32=yes
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else $as_nop
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libc_cv_arm_pcs_vfp_d32=no
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fi
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rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
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fi
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{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $libc_cv_arm_pcs_vfp_d32" >&5
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printf "%s\n" "$libc_cv_arm_pcs_vfp_d32" >&6; }
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if test "$libc_cv_arm_pcs_vfp_d32" = yes ;
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then
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printf "%s\n" "#define HAVE_ARM_PCS_VFP_D32 1" >>confdefs.h
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fi
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{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether PC-relative relocs in movw/movt work properly" >&5
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printf %s "checking whether PC-relative relocs in movw/movt work properly... " >&6; }
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if test ${libc_cv_arm_pcrel_movw+y}
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then :
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printf %s "(cached) " >&6
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else $as_nop
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cat > conftest.s <<\EOF
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.syntax unified
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.arm
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.arch armv7-a
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.text
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.globl foo
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.type foo,%function
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foo: movw r0, #:lower16:symbol - 1f - 8
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movt r0, #:upper16:symbol - 1f - 8
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1: add r0, pc
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@ And now a case with a local symbol.
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movw r0, #:lower16:3f - 2f - 8
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movt r0, #:upper16:3f - 2f - 8
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2: add r0, pc
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bx lr
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.data
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.globl symbol
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.hidden symbol
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symbol: .long 23
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3: .long 17
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EOF
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libc_cv_arm_pcrel_movw=no
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${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
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-nostartfiles -nostdlib -shared \
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-o conftest.so conftest.s 1>&5 2>&5 &&
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LC_ALL=C $READELF -dr conftest.so > conftest.dr 2>&5 &&
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{
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cat conftest.dr 1>&5
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grep -F 'TEXTREL
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R_ARM_NONE' conftest.dr > /dev/null || libc_cv_arm_pcrel_movw=yes
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}
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rm -f conftest*
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fi
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{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $libc_cv_arm_pcrel_movw" >&5
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printf "%s\n" "$libc_cv_arm_pcrel_movw" >&6; }
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if test $libc_cv_arm_pcrel_movw = yes; then
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printf "%s\n" "#define ARM_PCREL_MOVW_OK 1" >>confdefs.h
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fi
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# This was buggy in assemblers from GNU binutils versions before 2.25.1
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# (it's known to be broken in 2.24 and 2.25; see
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# https://sourceware.org/bugzilla/show_bug.cgi?id=18383).
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{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether TPOFF relocs with addends are assembled correctly" >&5
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printf %s "checking whether TPOFF relocs with addends are assembled correctly... " >&6; }
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if test ${libc_cv_arm_tpoff_addend+y}
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then :
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printf %s "(cached) " >&6
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else $as_nop
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cat > conftest.s <<\EOF
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.syntax unified
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.arm
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.arch armv7-a
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.text
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foo:
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.word tbase(tpoff)+4
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.section .tdata,"awT",%progbits
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.word -4
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tbase: .word 0
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.word 4
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EOF
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libc_cv_arm_tpoff_addend=no
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${CC-cc} -c $CFLAGS $CPPFLAGS \
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-o conftest.o conftest.s 1>&5 2>&5 &&
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LC_ALL=C $READELF -x.text conftest.o > conftest.x 2>&5 &&
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{
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cat conftest.x 1>&5
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$AWK 'BEGIN { result = 2 }
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$1 ~ /0x0+/ && $2 ~ /[0-9a-f]+/ {
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# Check for little-endian or big-endian encoding of 4 in the in-place addend.
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result = ($2 == "04000000" || $2 == "00000004") ? 0 : 1
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}
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END { exit(result) }
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' conftest.x 2>&5 && libc_cv_arm_tpoff_addend=yes
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}
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rm -f conftest*
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fi
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{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $libc_cv_arm_tpoff_addend" >&5
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printf "%s\n" "$libc_cv_arm_tpoff_addend" >&6; }
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if test $libc_cv_arm_tpoff_addend = no; then
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config_vars="$config_vars
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test-xfail-tst-tlsalign = yes"
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config_vars="$config_vars
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test-xfail-tst-tlsalign-static = yes"
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fi
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libc_cv_gcc_unwind_find_fde=no
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# Remove -fno-unwind-tables that was added in sysdeps/arm/preconfigure.ac.
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CFLAGS=${CFLAGS% -fno-unwind-tables}
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