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LoongArch: Use medium cmodel build libc_nonshared.a.

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This patch is used to fix address out-of-bounds error when building
Chrome.
This commit is contained in:
Chenghua Xu 2022-09-07 10:33:00 +08:00 committed by caiyinyu
parent 8d6083717c
commit 9f482b73f4
3 changed files with 38 additions and 0 deletions
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6
sysdeps/loongarch/Makefile
View File

@ -5,3 +5,9 @@ endif
# LoongArch's assembler also needs to know about PIC as it changes the
# definition of some assembler macros.
ASFLAGS-.os += $(pic-ccflag)
# All the objects in lib*_nonshared.a need to be compiled with medium code
# model or large applications may fail to link.
ifeq (yes,$(have-cmodel-medium))
CFLAGS-.oS += -mcmodel=medium
endif

22
sysdeps/loongarch/configure vendored
View File

@ -72,3 +72,25 @@ if test "$libc_cv_static_pie_on_loongarch" = yes; then
$as_echo "#define SUPPORT_STATIC_PIE 1" >>confdefs.h
fi
# Check if gcc supports option -mcmodel=medium.
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether $CC supports option -mcmodel=medium" >&5
$as_echo_n "checking whether $CC supports option -mcmodel=medium... " >&6; }
if ${libc_cv_loongarch_cmodel_medium+:} false; then :
$as_echo_n "(cached) " >&6
else
if { ac_try='${CC-cc} -c $CFLAGS -mcmodel=medium /dev/null 1>&5'
{ { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
(eval $ac_try) 2>&5
ac_status=$?
$as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
test $ac_status = 0; }; }; then
libc_cv_loongarch_cmodel_medium=yes
else
libc_cv_loongarch_cmodel_medium=no
fi
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_loongarch_cmodel_medium" >&5
$as_echo "$libc_cv_loongarch_cmodel_medium" >&6; }
config_vars="$config_vars
have-cmodel-medium = $libc_cv_loongarch_cmodel_medium"

10
sysdeps/loongarch/configure.ac
View File

@ -51,3 +51,13 @@ EOF
if test "$libc_cv_static_pie_on_loongarch" = yes; then
AC_DEFINE(SUPPORT_STATIC_PIE)
fi
# Check if gcc supports option -mcmodel=medium.
AC_CACHE_CHECK(whether $CC supports option -mcmodel=medium,
libc_cv_loongarch_cmodel_medium, [
if AC_TRY_COMMAND(${CC-cc} -c $CFLAGS -mcmodel=medium /dev/null 1>&AS_MESSAGE_LOG_FD); then
libc_cv_loongarch_cmodel_medium=yes
else
libc_cv_loongarch_cmodel_medium=no
fi])
LIBC_CONFIG_VAR([have-cmodel-medium], [$libc_cv_loongarch_cmodel_medium])