diff options
Diffstat (limited to 'packages/glibc/2.25/0005-sparc-extra-plt-call.patch')
| -rw-r--r-- | packages/glibc/2.25/0005-sparc-extra-plt-call.patch | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/packages/glibc/2.25/0005-sparc-extra-plt-call.patch b/packages/glibc/2.25/0005-sparc-extra-plt-call.patch new file mode 100644 index 0000000..7b01b83 --- /dev/null +++ b/packages/glibc/2.25/0005-sparc-extra-plt-call.patch @@ -0,0 +1,64 @@ +commit bdc543e338281da051b3dc06eae96c330a485ce6 +Author: Adhemerval Zanella <adhemerval.zanella@linaro.org> +Date: Thu Mar 16 09:15:57 2017 -0300 + + sparc: Fix .udiv plt on libc + + With the removal of divdi3 object from sparcv9-linux-gnu build, its + definition came from libgcc and its functions internall calls .udiv. + Since glibc also exports these symbols for compatibility reasons, it + will end up creating PLT calls internally in libc.so. + + To avoid it, this patch uses the linker option --wrap to replace all + the internal libc.so .udiv calls to the wrapper __wrap_.udiv. Along + with strong alias in the udiv implementations, it makes linker do + local calls. + + Checked on sparcv9-linux-gnu. + + * sysdeps/sparc/sparc32/Makefile (libc.so-gnulib): New rule. + * sysdeps/sparc/sparc32/sparcv8/udiv.S (.udiv): Make a strong_alias + to __wrap_.udiv. + * sysdeps/sparc/sparc32/sparcv9/udiv.S (.udiv): Likewise. + * sysdeps/sparc/sparc32/udiv.S (.udiv): Likewise. + +--- + sysdeps/sparc/sparc32/Makefile | 6 ++++++ + sysdeps/sparc/sparc32/sparcv8/udiv.S | 1 + + sysdeps/sparc/sparc32/sparcv9/udiv.S | 1 + + sysdeps/sparc/sparc32/udiv.S | 1 + + 4 files changed, 9 insertions(+) + +--- a/sysdeps/sparc/sparc32/Makefile ++++ b/sysdeps/sparc/sparc32/Makefile +@@ -47,3 +47,9 @@ + mv -f $@-tmp $@ + + sysdep-realclean := $(sysdep-realclean) $(divrem:%=sysdeps/sparc/sparc32/%.S) ++ ++# libgcc __divdi3 and __moddi3 uses .udiv and since it is also exported by ++# libc.so linker will create PLTs for the symbol. To avoid it we strong alias ++# the exported libc one to __wrap_.udiv and use linker option --wrap to make any ++# call to .udiv to call the wrapper symbol. ++libc.so-gnulib += -Wl,--wrap=.udiv +--- a/sysdeps/sparc/sparc32/sparcv8/udiv.S ++++ b/sysdeps/sparc/sparc32/sparcv8/udiv.S +@@ -13,3 +13,4 @@ + udiv %o0, %o1, %o0 + + END(.udiv) ++strong_alias (.udiv, __wrap_.udiv) +--- a/sysdeps/sparc/sparc32/sparcv9/udiv.S ++++ b/sysdeps/sparc/sparc32/sparcv9/udiv.S +@@ -15,3 +15,4 @@ + udiv %o0, %o1, %o0 + + END(.udiv) ++strong_alias (.udiv, __wrap_.udiv) +--- a/sysdeps/sparc/sparc32/udiv.S ++++ b/sysdeps/sparc/sparc32/udiv.S +@@ -344,3 +344,4 @@ + mov %o2, %o0 + + END(.udiv) ++strong_alias (.udiv, __wrap_.udiv) |