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aarch64: morello: configure change for purecap abi

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Detect default-abi and add aarch64-purecap make variable.

Purecap abi sets HIDDEN_VAR_NEEDS_DYNAMIC_RELOC and unsets
SUPPORT_STATIC_PIE.
This commit is contained in:
Szabolcs Nagy 2022-04-08 16:27:01 +01:00
parent 4fc4072240
commit 18fb025070
2 changed files with 69 additions and 15 deletions
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54
sysdeps/aarch64/configure vendored Normal file → Executable file
View File

@ -1,10 +1,6 @@
# This file is generated from configure.ac by Autoconf. DO NOT EDIT!
# Local configure fragment for sysdeps/aarch64.
# Static PIE is supported.
$as_echo "#define SUPPORT_STATIC_PIE 1" >>confdefs.h
# We check to see if the compiler and flags are
# selecting the big endian ABI and if they are then
# we set libc_cv_aarch64_be to yes which causes
@ -167,16 +163,56 @@ rm -f conftest*
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_aarch64_be" >&5
$as_echo "$libc_cv_aarch64_be" >&6; }
# Check for purecap ABI too, an alternative name is l64pc128.
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for purecap ABI" >&5
$as_echo_n "checking for purecap ABI... " >&6; }
if ${libc_cv_aarch64_purecap+:} false; then :
$as_echo_n "(cached) " >&6
else
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
#ifdef __CHERI_PURE_CAPABILITY__
yes
#endif
_ACEOF
if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
$EGREP "yes" >/dev/null 2>&1; then :
libc_cv_aarch64_purecap=yes
else
libc_cv_aarch64_purecap=no
fi
rm -f conftest*
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_aarch64_purecap" >&5
$as_echo "$libc_cv_aarch64_purecap" >&6; }
config_vars="$config_vars
aarch64-purecap = $libc_cv_aarch64_purecap"
libc_aarch64_be=""
if test $libc_cv_aarch64_be = yes; then
$as_echo "#define HAVE_AARCH64_BE 1" >>confdefs.h
config_vars="$config_vars
default-abi = lp64_be"
else
config_vars="$config_vars
default-abi = lp64"
libc_aarch64_be="_be"
fi
libc_aarch64_abi="lp64"
if test $libc_cv_aarch64_purecap = yes; then
libc_aarch64_abi="purecap"
# The purecap abi requires relocations because objects may not be
# within bounds for PCC. This means static-pie is not supported.
$as_echo "#define HIDDEN_VAR_NEEDS_DYNAMIC_RELOC 1" >>confdefs.h
else
# Static PIE is supported. Hidden variables only need relocations
# in PIE with -mcmodel=large, but that's unsupported.
$as_echo "#define SUPPORT_STATIC_PIE 1" >>confdefs.h
fi
config_vars="$config_vars
default-abi = $libc_aarch64_abi$libc_aarch64_be"
# Only consider BTI supported if -mbranch-protection=bti is
# on by default in the compiler and the linker produces
# binaries with GNU property notes in PT_GNU_PROPERTY segment.

30
sysdeps/aarch64/configure.ac
View File

@ -1,9 +1,6 @@
GLIBC_PROVIDES dnl See aclocal.m4 in the top level source directory.
# Local configure fragment for sysdeps/aarch64.
# Static PIE is supported.
AC_DEFINE(SUPPORT_STATIC_PIE)
# We check to see if the compiler and flags are
# selecting the big endian ABI and if they are then
# we set libc_cv_aarch64_be to yes which causes
@ -17,13 +14,34 @@ AC_CACHE_CHECK([for big endian],
yes
#endif
], libc_cv_aarch64_be=yes, libc_cv_aarch64_be=no)])
# Check for purecap ABI too, an alternative name is l64pc128.
AC_CACHE_CHECK([for purecap ABI],
[libc_cv_aarch64_purecap],
[AC_EGREP_CPP(yes,[#ifdef __CHERI_PURE_CAPABILITY__
yes
#endif
], libc_cv_aarch64_purecap=yes, libc_cv_aarch64_purecap=no)])
LIBC_CONFIG_VAR([aarch64-purecap], [$libc_cv_aarch64_purecap])
libc_aarch64_be=""
if test $libc_cv_aarch64_be = yes; then
AC_DEFINE(HAVE_AARCH64_BE)
LIBC_CONFIG_VAR([default-abi], [lp64_be])
else
LIBC_CONFIG_VAR([default-abi], [lp64])
libc_aarch64_be="_be"
fi
libc_aarch64_abi="lp64"
if test $libc_cv_aarch64_purecap = yes; then
libc_aarch64_abi="purecap"
# The purecap abi requires relocations because objects may not be
# within bounds for PCC. This means static-pie is not supported.
AC_DEFINE(HIDDEN_VAR_NEEDS_DYNAMIC_RELOC)
else
# Static PIE is supported. Hidden variables only need relocations
# in PIE with -mcmodel=large, but that's unsupported.
AC_DEFINE(SUPPORT_STATIC_PIE)
fi
LIBC_CONFIG_VAR([default-abi], [$libc_aarch64_abi$libc_aarch64_be])
# Only consider BTI supported if -mbranch-protection=bti is
# on by default in the compiler and the linker produces
# binaries with GNU property notes in PT_GNU_PROPERTY segment.