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e0590f41fe
This patch referents the commit 374cef3 to add static-pie support. And
because the dummy link map is used when relocating ourselves, so need
not to set __global_pointer$ at this time.
It will also check whether toolchain supports to build static-pie.
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
83 lines
2.8 KiB
Plaintext
83 lines
2.8 KiB
Plaintext
# This file is generated from configure.ac by Autoconf. DO NOT EDIT!
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# Local configure fragment for sysdeps/riscv/elf.
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# Check if static linker supports R_RISCV_ALIGN
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{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for R_RISCV_ALIGN linker relaxation support" >&5
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printf %s "checking for R_RISCV_ALIGN linker relaxation support... " >&6; }
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if test ${libc_cv_riscv_r_align+y}
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then :
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printf %s "(cached) " >&6
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else $as_nop
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cat > conftest.S <<EOF
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.align 3
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foo:
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li a0,42
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ret
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EOF
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libc_cv_riscv_r_align=no
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if { ac_try='${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -nostdlib -nostartfiles $no_ssp -shared -fPIC -o contests.o conftest.S'
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{ { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
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(eval $ac_try) 2>&5
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ac_status=$?
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printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
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test $ac_status = 0; }; }
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then
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libc_cv_riscv_r_align=yes
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fi
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rm -rf conftest.*
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fi
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{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $libc_cv_riscv_r_align" >&5
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printf "%s\n" "$libc_cv_riscv_r_align" >&6; }
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config_vars="$config_vars
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riscv-r-align = $libc_cv_riscv_r_align"
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{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if the toolchain is sufficient to build static PIE on RISC-V" >&5
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printf %s "checking if the toolchain is sufficient to build static PIE on RISC-V... " >&6; }
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if test ${libc_cv_static_pie_on_riscv+y}
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then :
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printf %s "(cached) " >&6
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else $as_nop
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cat > conftest1.S <<\EOF
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.globl _start
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.type _start, @function
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_start:
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nop
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.data
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/* This should produce an R_RISCV_RELATIVE in the static PIE. */
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.dword _start
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EOF
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libc_cv_static_pie_on_riscv=no
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if { ac_try='${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -static-pie -nostdlib -fPIE -o conftest1 conftest1.S'
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{ { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
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(eval $ac_try) 2>&5
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ac_status=$?
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printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
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test $ac_status = 0; }; } \
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&& { ac_try='LC_ALL=C $READELF -Wr conftest1 | grep -q R_RISCV_RELATIVE'
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{ { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
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(eval $ac_try) 2>&5
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ac_status=$?
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printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
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test $ac_status = 0; }; } \
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&& ! { ac_try='LC_ALL=C $READELF -Wl conftest1 | grep -q INTERP'
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{ { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
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(eval $ac_try) 2>&5
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ac_status=$?
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printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
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test $ac_status = 0; }; }
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then
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libc_cv_static_pie_on_riscv=yes
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fi
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rm -rf conftest*
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fi
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{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $libc_cv_static_pie_on_riscv" >&5
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printf "%s\n" "$libc_cv_static_pie_on_riscv" >&6; }
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if test "$libc_cv_static_pie_on_riscv" = yes; then
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printf "%s\n" "#define SUPPORT_STATIC_PIE 1" >>confdefs.h
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fi
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